1. A paper cutting apparatus, characterized by comprising: the paper conveying device comprises a frame (1) for bearing paper, wherein the frame (1) is sequentially provided with a pressing area (111), a cutting area (112) and a tensioning area (113) according to the conveying direction of the paper;

the paper cutting device further comprises a front pressing piece (3) which is movably connected with the rack (1) and can be matched with the pressing area (111) to press paper, a cutter (2) which is slidably connected with the rack (1) and can be matched with the cutting area (112) to cut off the paper, a rear pressing component (4) which is movably connected with the rack (1) and can be matched with the tensioning area (113) to press the paper, a cutting power mechanism (6) for driving the cutter (2) to lift, a front linkage mechanism (5) for driving the front pressing piece (3) to move, and a rear linkage mechanism (7) for driving the rear pressing component (4) to move;

when the front linkage mechanism (5) drives the front pressing piece (3) to abut against paper and the rear linkage mechanism (7) drives the rear pressing component (4) to abut against the paper, the cutting power mechanism (6) can drive the cutter (2) to cut the paper.

2. The paper cutting apparatus according to claim 1, characterized in that: the rear linkage mechanism (7) comprises a rear support block (72) fixed on the cutter (2) to move along with the cutter (2) and a rear elastic piece (71) used for enabling the rear pressing assembly (4) to move towards the direction close to the tensioning area (113);

the rear supporting block (72) is arranged between the rear pressing component (4) and the tensioning area (113), and the rear supporting block (72) can abut against the rear pressing component (4) so as to limit the distance between the rear pressing component (4) and the tensioning area (113); and two ends of the rear elastic piece (71) are respectively connected to the rack (1) and the rear pressing component (4).

3. The paper cutting apparatus according to claim 1, characterized in that: the rear pressing assembly (4) comprises a rear pressing roller (41) used for being matched with the tensioning area (113) to abut against paper and a supporting frame (42) used for driving the rear pressing roller (41) to move.

4. The paper cutting apparatus according to claim 3, characterized in that: the rear pressing roller (41) is rotatably connected with the supporting frame (42) through a connecting shaft (43), and a tensioning friction surface (411) is arranged on the peripheral side of the rear pressing roller (41); the paper cutting device also comprises a tensioning driving component (8) for driving the connecting shaft (43) to rotate;

when the front pressing piece (3) is matched with the pressing area (111) to press paper, the tensioning friction surface (411) can be matched with the tensioning area (113) to press paper, and the tensioning driving assembly (8) can drive the rear pressing roller (41) to rotate so as to tension the paper.

5. The paper cutting apparatus according to claim 4, wherein: the tensioning driving assembly (8) comprises a tensioning driving gear (81) for driving the rear pressing roller (41) to rotate and a tensioning driving rack (82) capable of being meshed with the tensioning driving gear (81); the driving gear is coaxially connected with the connecting shaft (43), and the tensioning driving rack (82) is fixedly connected with the cutter (2);

in the process that the cutting knife (2) gradually approaches the cutting area (112), the driving rack can move along with the cutting knife (2) and can drive the tensioning driving gear (81) to rotate.

6. The paper cutting apparatus according to claim 5, characterized in that: the supporting frame (42) is provided with a rotating part (4221) hinged with the rack (1), a distance is reserved between the rotating part (4221) and the connecting shaft (43), and the tensioning driving rack (82) is positioned on one side, away from the rotating part (4221), of the tensioning driving gear (81);

the tensioning drive gear (81) can move around the rotation part (4221) in a direction away from the tensioning drive rack (82) in the process that the cutting knife (2) gradually moves away from the cutting area (112).

7. The paper cutting apparatus according to claim 5, characterized in that: and a one-way transmission bearing (83) is connected between the tensioning driving gear (81) and the connecting shaft (43), so that the tensioning driving gear (81) and the connecting shaft (43) can rotate relatively when the tensioning driving rack (82) ascends.

8. The paper cutting apparatus according to claim 1, characterized in that: the cutting power mechanism (6) comprises a supporting column (61) capable of driving the cutting knife (2) to ascend and descend in a circular motion mode, a driving wheel (62) used for driving the supporting column (61) to move, and a power part (63) used for driving the driving wheel (62) to rotate, the driving wheel (62) is rotatably connected with the rack (1), and the supporting column (61) is eccentrically arranged on the driving wheel (62); the cutting knife (2) is provided with a driving groove (23) for the supporting column (61) to be connected in a sliding mode, and an included angle is formed between the length direction of the driving groove (23) and the moving direction of the cutting knife (2).

9. The paper cutting apparatus according to claim 1, characterized in that: supporting blocks (331) are arranged at two ends of the front pressing piece (3), a supporting hole (121) for accommodating the supporting blocks (331) is formed in the rack (1), a groove part (122) capable of enabling the supporting blocks (331) to swing is formed in the supporting hole (121), and the front pressing piece (3) can approach or be far away from the pressing area (111) in a swinging mode;

the front linkage mechanism (5) comprises a front supporting block (52) fixed on the cutting knife (2) to move along with the cutting knife (2) and a front elastic piece (51) used for enabling the front pressing piece (3) to swing towards the direction close to the pressing area (111); the front supporting block (52) is arranged between the front pressing piece (3) and the pressing area (111), and the front supporting block (52) can abut against the front pressing piece (3) to limit the distance between the front pressing piece (3) and the pressing area (111); two ends of the front elastic piece (51) are respectively connected with the rack (1) and the front pressing piece (3).

10. The paper cutting apparatus according to claim 5, characterized in that: the cutting knife (2) is provided with a limiting plate (21), the rack (1) is provided with a limiting groove (123) for limiting the limiting plate (21), and the limiting plate (21) is connected with the limiting groove (123) in a sliding manner;

one end of the limiting plate (21) is exposed out of the rack (1) through the limiting groove (123) and is provided with a linkage plate (25), and the front linkage mechanism (5) and the tensioning driving assembly (8) are connected with the linkage plate (25).

Background

At present, paper is widely applied to the intelligent retail industry, especially in scenes such as automatic lottery selling, movie ticket selling and the like, which realize unmanned automatic ticket drawing. The working principle of the automatic paper ticket issuing is that paper is printed, then the paper is transported to a corresponding position to be cut, and the cut part of the paper is the corresponding ticket, wherein the whole quality of the paper ticket is directly determined by the paper printing and the paper cutting. With the explosion of new retail demands in the market, the requirements of people for intelligent printing and intelligent cutting are higher and higher.

In the prior art, as disclosed in the chinese utility model patent with the publication number CN207433057U, a paper cutting mechanism suitable for bills with pages is provided, which comprises a core frame, a chain type paper feeder and a cutter assembly; the cutter subassembly locates chain form feed ware exit paper end one side on the core frame, and the cutter subassembly includes left wallboard, right wallboard, go up draws the cardboard, draw the cardboard down, the paper cutter subassembly (the paper cutting word car subassembly in the original text promptly), including a motor, stationary knife and play paper draw board, the paper cutter subassembly is by motor drive reciprocating motion between left socle and right branch frame, and the edge of a knife of paper cutter subassembly is relative with the edge of a knife of stationary knife, and the tax reciept of even page or leaf can be followed in the chain form feed ware directly gets into the cutter subassembly.

In view of the above-mentioned related art, the inventors have considered that the paper is less tensioned when cut by the cutter unit, and the paper is likely to wrinkle at the portion where the paper abuts against the cutter unit, which causes a problem that the cutting position is not accurate enough.

Disclosure of Invention

The application provides a paper cutting device has the high effect of paper cutting position accuracy, adopts following technical scheme:

a paper cutting apparatus comprising: the paper conveying device comprises a rack for bearing paper, wherein the rack is sequentially provided with a pressing area, a cutting area and a tensioning area according to the conveying direction of the paper;

the paper cutting device also comprises a front pressing piece which is movably connected with the rack and can be matched with the pressing area to press paper, a cutter which is slidably connected with the rack and can be matched with the cutting area to cut off the paper, a rear pressing assembly which is movably connected with the rack and can be matched with the tensioning area to press the paper, a cutting power mechanism for driving the cutter to lift, a front linkage mechanism for driving the front pressing piece to move, and a rear linkage mechanism for driving the rear pressing assembly to move;

when the front linkage mechanism drives the front pressing piece to press paper and the rear linkage mechanism drives the rear pressing assembly to press paper, the cutting power mechanism can drive the cutter to cut the paper.

Through adopting above-mentioned technical scheme, when needs cut off the paper, cut off power unit and order about the cutter and remove, and under preceding link gear's linkage effect, preceding casting die follows the cutter and takes place to remove, and under rear link gear's linkage effect, the back is pressed the subassembly and is followed the cutter and take place to remove, just makes the paper keep the tensioning state before cutter contact paper, reduces the paper because the fold that receives the cutter conflict to take place, cuts off the position more accurate, is applicable to cutting off of the great paper of thickness.

Optionally, the rear linkage mechanism includes a rear support block fixed to the cutter to move along with the cutter, and a rear elastic member for moving the rear pressing assembly toward a direction approaching the tensioning area;

the rear supporting block is arranged between the rear pressing assembly and the tensioning area and can abut against the rear pressing assembly so as to limit the distance between the rear pressing assembly and the tensioning area; two ends of the rear elastic piece are respectively connected to the rack and the rear pressing component.

Through adopting above-mentioned technical scheme, back tray sets up between atress board and tensioning zone, and the height of back tray has restricted the minimum distance between back compression roller and the tensioning zone. When the cutter needs to cut off paper, the cutter drives the rear supporting block to descend, and the rear pressing roller can gradually move towards the direction close to the tensioning area under the thrust action of the rear elastic piece.

Optionally, the rear pressing assembly comprises a rear pressing roller and a supporting frame, the rear pressing roller is used for being matched with the tensioning area to abut against paper, and the supporting frame is used for driving the rear pressing roller to move.

Through adopting above-mentioned technical scheme, the support frame is used for supporting fixed back compression roller.

Optionally, the rear pressing roller is rotatably connected with the supporting frame through a connecting shaft, and a tensioning friction surface is arranged on the periphery of the rear pressing roller; the paper cutting device also comprises a tensioning driving assembly for driving the connecting shaft to rotate;

when the front pressing piece is matched with the pressing area to press paper, the tensioning friction surface can be matched with the tensioning area to press the paper, and the tensioning movable driving assembly can drive the rear pressing roller to rotate so as to tension the paper.

By adopting the technical scheme, when the rear pressing roller rotates, the tensioning friction surface of the rear pressing roller is abutted to the paper, the paper tends to move continuously along the conveying direction due to the friction force between the tensioning friction surface and the paper, and the paper is tightly pressed by the pressing piece before being matched, so that the paper and the aligned part of the cutting area are kept in a tensioning state.

Optionally, the tensioning driving assembly comprises a tensioning driving gear for driving the rear pressing roller to rotate and a tensioning driving rack capable of being meshed with the tensioning driving gear; the driving gear is coaxially connected with the connecting shaft, and the tensioning driving rack is fixedly connected with the cutter;

in the process that the cutter gradually approaches the cutting area, the driving rack can move along with the cutter and can drive the tensioning driving gear to rotate.

By adopting the technical scheme, when the cutter descends, the tensioning driving rack cutter descends due to movement of the tensioning driving rack cutter, the tensioning driving gear rotates along with the descending of the tensioning driving rack, and the rear compression roller is driven to rotate.

Optionally, the support frame is provided with a rotating part hinged to the frame, a distance is reserved between the rotating part and the connecting shaft, and the tensioning driving rack is located on one side of the tensioning driving gear, which is far away from the rotating part;

in the process that the cutting knife is gradually far away from the cutting area, the tensioning driving gear can move around the rotating part towards the direction far away from the tensioning driving rack.

By adopting the technical scheme, a time difference is formed between the time point of the back pressing roller for abutting and pressing the paper and the time point of the back pressing roller for tensioning the paper by utilizing the separation mode between the tensioning driving gear and the tensioning driving rack, so that the tensioning of the back pressing roller on the paper before the cutter actually contacts the paper is reduced, and the damage of the friction force generated by the rotation of the back pressing roller on the back pressing roller or on the paper can be reduced.

Optionally, a one-way transmission bearing is connected between the tensioning driving gear and the connecting shaft, so that the tensioning driving gear and the connecting shaft can rotate relatively when the tensioning driving rack rises.

By adopting the technical scheme, when the tensioning driving rack descends, the rotation of the tensioning driving gear can drive the connecting shaft to rotate; when the tensioning driving rack ascends, the rotation of the tensioning driving gear cannot drive the connecting shaft to rotate under the influence of the one-way transmission bearing.

Optionally, the cutting power mechanism includes a supporting column capable of driving the cutting knife to ascend and descend in a circular motion manner, a driving wheel for driving the supporting column to move, and a power member for driving the driving wheel to rotate, the driving wheel is rotatably connected with the rack, and the supporting column is eccentrically arranged on the driving wheel; the cutter is provided with the confession support column sliding connection's drive groove, the length direction in drive groove with the moving direction of cutter forms the contained angle.

Through adopting above-mentioned technical scheme, the drive wheel can drive the support column and do circular motion. When the supporting column is static, the cutter is stopped at the height corresponding to the supporting column; when the support column is circular motion, the displacement of the support column in the existing horizontal direction also has the displacement of vertical direction, and when the height of the support column changes, the support column slides relative to the driving groove, and the cutter can be lifted along with the height change of the support column under the action of gravity.

Optionally, support blocks are arranged at two ends of the front pressing piece, a support hole for the support blocks to accommodate is formed in the frame, a groove portion capable of allowing the support blocks to swing is formed in the support hole, and the front pressing piece can approach or be far away from the pressing area in a swinging mode;

the front linkage mechanism comprises a front supporting block fixed on the cutter to move along with the cutter and a front elastic piece used for enabling the front pressing piece to swing towards the direction close to the pressing area; the front supporting block is arranged between the front pressing piece and the pressing area, and can abut against the front pressing piece to limit the distance between the front pressing piece and the pressing area; two ends of the front elastic piece are respectively connected to the rack and the front pressing piece.

Through adopting above-mentioned technical scheme, under the thrust effect of preceding elastic component, the conflict of preceding tray is in the lower surface that lifts the piece to support lifting the piece. The front supporting block is arranged between the lifting block and the pressing area, the height of the lifting block is limited by the height of the front supporting block, and therefore the minimum distance between the front pressing piece and the pressing area is limited by the height of the front supporting block. When the cutter needs to cut off the paper, the cutter drives the front support block to descend, and the front pressing piece can gradually swing towards the direction close to the pressing area under the thrust action of the front elastic piece; when the cutter rises, the cutter drives the front supporting block to rise, and under the supporting action of the front supporting block, the front pressing piece can swing towards the direction far away from the pressing area gradually.

Optionally, the cutter is provided with a limiting plate, the rack is provided with a limiting groove for limiting the limiting plate, and the limiting plate is connected with the limiting groove in a sliding manner;

one end of the limiting plate is exposed out of the rack through the limiting groove and is provided with a linkage plate, and the front linkage mechanism and the tensioning driving assembly are connected with the linkage plate.

Through adopting above-mentioned technical scheme, when the cutter goes up and down, the frame has limiting displacement to the limiting plate through the spacing groove to prevent that the removal route of cutter from taking place the slope. The cutter is simultaneously connected with the front linkage mechanism and the tensioning driving assembly through the linkage plate, so that the overall structure of the paper cutting device is more compact.

Drawings

Fig. 1 is a front view of a paper cutting device according to a first embodiment of the present application.

Fig. 2 is a schematic view of an internal structure of the paper cutting apparatus according to the first embodiment of the present application.

Fig. 3 is an exploded view of the housing of fig. 1.

Fig. 4 is a schematic structural view of a front pressing member, a cutter and a front linkage mechanism according to a first embodiment of the present application.

Fig. 5 is a schematic structural diagram of a cutter, a cutting power mechanism, a rear pressing assembly and a rear linkage mechanism according to the first embodiment of the present application.

Fig. 6 is a schematic diagram illustrating the switching of the state of the paper cutting apparatus when the paper cutting apparatus is in operation, wherein (a) is a state in which the cutter is located at an original height, (b) is a state in which the cutter is located at a first height, and (c) is a state in which the cutter is located at a second height.

Fig. 7 is a schematic flow chart of the operation of the sheet cutting device.

Fig. 8 is a schematic configuration diagram of a paper cutting device according to a second embodiment of the present application.

Description of reference numerals:

1. a frame; 11. a chassis; 111. a compression zone; 112. a cutting-off region; 1121. a bottom edge; 113. a tensioning zone; 114. avoiding holes; 12. a side vertical plate; 121. a support hole; 122. a groove part; 123. a limiting groove; 124. a swing hole; 13. a front baffle; 131. a front cover plate; 132. a front side plate; 133. a second positioning block; 14. a tailgate; 141. a rear cover plate; 142. a rear side plate; 1421. a fourth positioning block; 2. a cutter; 21. a limiting plate; 22. a cutter head; 23. a drive slot; 24. a hole of abdication; 25. a linkage plate; 26. a sharp edge; 3. a front pressing piece; 31. a thrust plate; 311. a lifting block; 312. a first positioning block; 32. a lower pressing plate; 33. a swing plate; 331. a support block; 4. a back pressure assembly; 41. a back press roll; 411. tensioning the friction surface; 42. a support frame; 421. a stress plate; 4211. a third positioning block; 422. a connecting plate; 4221. a rotating part; 4222. a contact surface; 43. a connecting shaft; 5. a front linkage mechanism; 51. a front elastic member; 52. a front support block; 6. a power cutting-off mechanism; 61. a support pillar; 62. a drive wheel; 63. a power member; 631. a worm; 632. a deceleration turbine; 64. a linkage rod; 65. a transmission gear; 7. a rear linkage mechanism; 71. a rear elastic member; 72. a rear supporting block; 8. a tension drive assembly; 81. a tension drive gear; 82. tensioning the drive rack; 83. a one-way transmission bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship, unless otherwise specified.

Embodiments of the present invention are described in further detail below with reference to figures 1 through 8 of the specification.

Example one

The embodiment of the application provides a paper cutting device. Referring to fig. 1 and 2, the paper cutting apparatus includes a frame 1 for supporting paper to be cut, a cutter 2 for cutting the paper, a front pressing member 3 disposed at one side of the cutter 2 and capable of pressing the paper, and a rear pressing member 4 disposed at the other side of the cutter 2 and capable of pressing the paper. Before cutting off the paper, the user can aim at the position that the cutter 2 was aimed at to the position that the paper need cut off, then makes preceding casting die 3 and back pressure subassembly 4 can compress tightly respectively in the both sides of paper cutting position to make the paper be difficult for taking place the fold when contact cutter 2, and then make the actual cutting off position of paper and the preset cutting off position overlap degree higher, and the incision is more level and more smooth.

Referring to fig. 2 and 3, in particular, the frame 1 includes a base plate 11, side vertical plates 12 fixed at two ends of the base plate 11, and a front baffle 13 and a rear baffle 14 fixed between the two side vertical plates 12. The chassis 11 is rectangular as a whole, the width direction of the chassis 11 is consistent with the conveying direction of paper, and the chassis 11 is sequentially provided with a pressing area 111 for matching with the front pressing part 3 to press the paper, a cutting area 112 for matching with the rear pressing part 4 to cut the paper, and a tensioning area 113 for matching with the rear pressing part 4 to press the paper.

Referring to fig. 3, since the paper passes through the pressing area 111, the cutting area 112 and the tensioning area 113 in sequence when cutting is performed, the pressing area 111 is the portion of the chassis 11 which contacts the paper first, and in order to reduce the possibility that the side edge of the paper will be jammed with the edge portion of the chassis 11 when the paper enters the frame 1, the side of the chassis 11 close to the pressing area 111 is inclined downward in the direction away from the cutting area 112.

Referring to fig. 3, preferably, two ends of the bottom plate 11 in the length direction are respectively bent downward at 90 °, and two side vertical plates 12 are respectively bolted to two ends of the bottom plate 11. An installation space is formed between the two side vertical plates 12, wherein the front baffle 13 is positioned on one side of the installation space close to the pressing area 111, and the rear baffle 14 is positioned on one side of the installation space far away from the pressing area 111.

Referring to fig. 3, the front barrier 13 is rectangular as a whole, the length direction of the front barrier 13 is identical to the length direction of the chassis 11, the width direction of the front barrier 13 is identical to the vertical direction, and a distance is left between the lower side of the front barrier 13 and the upper surface of the chassis 11 to allow sheets to enter the installation space. A front cover plate 131 is fixedly arranged on the upper side of the front baffle 13, and a right angle is formed between the front cover plate 131 and the front baffle 13; front side plates 132 are fixedly arranged at two ends of the front baffle 13 in the length direction, the front side plates 132 form a right angle with the front baffle 13, and the two front side plates 132 are bolted with the nearest side vertical plates 12 respectively.

Referring to fig. 3, preferably, the front cover plate 131, the front side plate 132 and the front baffle 13 are integrally formed, and the front cover plate 131 and the front side plate 132 are formed by a bending process.

Referring to fig. 3, the tailgate 14 has a rectangular shape as a whole, and the shape of the tailgate 14 matches the shape of the front tailgate 13, leaving a distance between the lower side of the tailgate 14 and the upper surface of the chassis 11 for sheets to pass through the installation space. A rear cover plate 141 is fixedly arranged on the upper side of the rear baffle plate 14, a right angle is formed between the rear cover plate 141 and the rear baffle plate 14, and the rear cover plate 141 and the front cover plate 131 are matched to shield the upper part of the installation space; the two ends of the rear baffle plate 14 in the length direction are respectively fixedly provided with a rear side plate 142, the rear side plates 142 and the rear baffle plate 14 form a right angle, and the two rear side plates 142 are respectively bolted with the nearest side vertical plates 12.

Referring to fig. 3, preferably, the back cover plate 141, the back side plate 142 and the back flap 14 are integrally formed, and the back cover plate 141 and the back side plate 142 are formed by a bending process.

Referring to fig. 3 and 4, specifically, the front pressing member 3 extends along the length direction of the chassis 11 as a whole, and the front pressing member 3 includes a thrust plate 31, a lower pressing plate 32 and a swing plate 33, wherein the thrust plate 31 is fixed to one side of the lower pressing plate 32 close to the pressing area 111, and the swing plate 33 is fixed to the other side of the lower pressing plate 32. In the present embodiment, the thrust plate 31, the swinging plate 33, and the lower pressing plate 32 are integrally formed, and the thrust plate 31 and the swinging plate 33 are respectively bent upward at 90 ° from both sides of the lower pressing plate 32. Further, both ends of the lower pressing plate 32 are bent upward at 90 ° and welded to the thrust plate 31 and the swing plate 33, respectively, so as to enhance the stability among the lower pressing plate 32, the thrust plate 31, and the swing plate 33.

Referring to fig. 3 and 4, specifically, the length of the swing plate 33 is greater than the distance between the two side vertical plates 12, two supporting blocks 331 are formed at two ends of the swing plate 33, and supporting holes 121 for the supporting blocks 331 to penetrate are formed in both the two side vertical plates 12; the two support blocks 331 are respectively disposed through the closest support holes 121, so that the swing plate 33 is limited between the two side vertical plates 12.

Referring to fig. 3 and 4, in order to leave a certain movement space for the supporting block 331 so that the lower pressing plate 32 can swing, the inner side of the supporting hole 121 close to the thrust plate 31 is recessed inward to form a groove portion 122, the space in the groove portion 122 is gradually increased from bottom to top, and an included angle is formed between one side of the supporting hole 121 far from the groove portion 122 and the inner wall of the groove portion 122.

Referring to fig. 3 and 4, preferably, the supporting block 331 is vertically disposed with a side of the supporting hole 121 away from the groove portion 122; the longitudinal section of the supporting block 331 is rectangular. When the supporting block 331 and the supporting hole 121 are away from the side of the groove portion 122, a gap is left between the lower pressing plate 32 and the chassis 11; when the supporting block 331 gradually moves toward the groove portion 122, the side of the lower pressing plate 32 away from the swinging plate 33 gradually approaches the chassis 11, and eventually the lower pressing plate 32 can collide with the chassis 11. In order to ensure that the pressing plate 32 can press the paper in cooperation with the pressing area 111, when the pressing plate 32 abuts against the pressing area 111, a gap is still left between the supporting block 331 and the inner side of the groove portion 122.

Referring to fig. 3 and 4, the length of the thrust plate 31 is greater than the distance between the two side vertical plates 12, two lifting blocks 311 are formed at two ends of the thrust plate 31, the two lifting blocks 311 are located in front of the side vertical plates 12, and in the swinging process of the lower pressing plate 32, the lifting blocks 311 are not in contact with the side vertical plates 12.

Referring to fig. 3 and 4, a plurality of first positioning blocks 312 are fixedly disposed on the upper side of the thrust plate 31. The front baffle 13 is located above the thrust plate 31, a plurality of second positioning blocks 133 are fixedly arranged below the front baffle 13, and each first positioning block 312 corresponds to each second positioning block 133 one by one. Preferably, the number of the positioning blocks is 2, and two positioning blocks are arranged on the thrust plate 31 at intervals.

Referring to fig. 3 and 4, further, the paper cutting device further includes a front linkage mechanism 5 for driving the front pressing member 3 to swing, and the front linkage mechanism 5 includes a front elastic member 51 and a front support block 52. The front elastic members 51 are compression springs, the number of the front elastic members 51 corresponds to the number of the first positioning blocks 312, and each front elastic member 51 is clamped between each first positioning block 312 and the corresponding second positioning block 133. The front supporting block 52 is fixed relative to the cutter 2, so that the front supporting block 52 can automatically lift along with the lifting of the cutter 2. In the present embodiment, the number of the front support blocks 52 is 2, and the two front support blocks 52 are respectively located below the two lifting blocks 311.

Referring to fig. 3 and 4, both ends of the front elastic member 51 respectively abut against the front baffle 13 and the thrust plate 31, and under the thrust of the front elastic member 51, the front support block 52 abuts against the lower surface of the lifting block 311 to support the lifting block 311. The front pad 52 is disposed between the lifting block 311 and the pressing area 111, and the height of the front pad 52 limits the height of the lifting block 311, so that the height of the front pad 52 limits the minimum distance between the lower pressing plate 32 and the pressing area 111.

Referring to fig. 2 and 3, when the cutter 2 needs to cut off the paper, the cutter 2 drives the front support block 52 to descend, and the lower press plate 32 gradually swings towards the direction approaching the pressing area 111 under the thrust of the front elastic member 51; when the cutter 2 ascends, the cutter 2 drives the front supporting block 52 to ascend, and the lower pressing plate 32 gradually swings towards a direction away from the pressing area 111 under the supporting action of the front supporting block 52. In this embodiment, during the gradual descending process of the cutting blade 2, the lower pressing plate 32 and the pressing area 111 will be pressed against both sides of the paper before the cutting blade 2 contacts the paper, so as to reduce the position deviation of the paper on the side close to the pressing area 111 during the gradual cutting process of the paper by the cutting blade 2, and ensure that the actual cutting position of the paper corresponds to the position of the cutting blade 2.

Referring to fig. 3 and 4, specifically, the position of the cutting knife 2 corresponds to the position of the cutting area 112, two ends of the cutting knife 2, which are close to the two side vertical plates 12, are respectively and fixedly provided with a limiting plate 21, and the limiting plates 21 are arranged in the vertical direction; the two side vertical plates 12 are respectively provided with a limiting groove 123 for the limiting plate 21 to penetrate through, and the limiting groove 123 extends along the vertical direction and is communicated with the lower surfaces of the side vertical plates 12. The two limiting plates 21 are respectively arranged in the corresponding limiting grooves 123 in a penetrating and sliding manner, the two limiting grooves 123 limit the movement of the cutter 2 only in the vertical direction, and the cutter 2 is prevented from inclining.

Referring to fig. 3 and 4, the cutter head 22 is provided at the lower portion of the cutter 2, the cutting area 112 has a through-groove structure, and the cutter head 22 can pass through the cutting area 112 and cut the paper when it descends to the lowest point. In this embodiment, the paper to be cut is paper with easy-tear strips, and in the cutting process, the cutter 2 collides with the easy-tear strips through the cutter head 22 so that the paper is torn and cut at the easy-tear strips. In order to make the easy-to-tear strip easier to break, the cutter head 22 is gradually inclined upwards from the middle to two sides and is integrally conical; when the cutter head 22 cuts off the paper, the middle part of the cutter head 22 is firstly contacted with the paper, and because the area in the middle part of the cutter head 22 is smaller, the stress effect of the paper is concentrated in the middle part, so that the middle part of the paper can be cracked instantly, and the paper can be more easily cut off and the cut-off opening is smoother.

Referring to fig. 5, the paper cutting device further includes a cutting power mechanism 6 for supporting the cutting knife 2 and driving the cutting knife 2 to move up and down, and the cutting power mechanism 6 includes a supporting post 61 for supporting the cutting knife 2, a driving wheel 62 capable of driving the supporting post 61 to move by rotating itself, and a power member 63 for providing power for the rotation of the driving wheel 62.

Referring to fig. 5, specifically, the number of the support columns 61 is 2, the axes of the support columns 61 are parallel to the horizontal direction, and the two support columns 61 are arranged at intervals and the axes are located at the same horizontal height. Two driving grooves 23 corresponding to the supporting columns 61 one to one are formed in the upper portion of the cutter 2, the driving grooves 23 extend in the horizontal direction, and the groove width of the driving grooves 23 is consistent with the radius of the supporting columns 61. Two support columns 61 wear to locate respectively corresponding to the driving groove 23, and the side of support column 61 is contradicted in the upside cell wall of driving groove 23, and two support columns 61 have a supporting role to cutter 2. When the support column 61 is at rest, the cutter 2 is stopped at the height corresponding to the support column 61; when the support column 61 makes circular motion, the support column 61 has displacement in the horizontal direction and also has displacement in the vertical direction, and when the height of the support column 61 changes, the support column 61 slides in the driving groove 23, and the cutter 2 can lift along with the height change of the support column 61 under the action of gravity.

Referring to fig. 5, in the present embodiment, the two supporting columns 61 each change their height by making a circular motion, and when the cutting knife 2 is located at the highest position or the lowest position, the two supporting columns 61 are respectively located at the middle of the corresponding driving slot 23.

Referring to fig. 3 and 5, specifically, the number of the driving wheels 62 is 2, the two driving wheels 62 are respectively hinged to the front baffle 13, the axes of the two driving wheels 62 are located at the same horizontal height, and the two supporting columns 61 are respectively eccentrically arranged on the two driving wheels 62, so that the driving wheels 62 can drive the corresponding supporting columns 61 to perform circular motion through self-rotation. In this embodiment, the support column 61 is fixedly connected to the drive wheel 62 by interference fit.

Referring to fig. 3 and 5, preferably, the length of the driving groove 23 is slightly greater than the length of the supporting column 61 making one circular motion around the axis of the driving wheel 62, so that the cutting knife 2 can be reset to the highest position after moving from the highest position to the lowest position or the cutting knife 2 can be reset to the lowest position after moving from the lowest position to the highest position every time the supporting column 61 makes one complete circular motion, and the driving wheel 62 does not need to change the rotation direction midway.

Referring to fig. 5, the driving wheels 62 are preferably selected as gears, and the two driving wheels 62 are in meshing transmission. Two drive wheels 62 can be divided into action wheel and follow driving wheel, and when the action wheel rotated with forward, follow driving wheel simultaneous reverse rotation, circular motion was done simultaneously to two support columns 61, and the direction of motion when though two support columns 61 removed is opposite, but two support columns 61 were unanimous in the ascending displacement of vertical direction, consequently can drive cutter 2 and go up and down in step.

Referring to fig. 5, specifically, the power member 63 is located on a side of the cutting blade 2 away from the driving wheel 62, and the tailgate 14 is fixedly provided with a fixing plate (not shown) for bolting the power member 63. The power part 63 is selected as a motor, the output end of the power part 63 is fixedly provided with a worm 631, and the worm 631 is engaged with a speed reduction turbine 632.

Referring to fig. 5, a linkage rod 64 is rotatably connected between the front baffle 13 and the rear baffle 14 through a rotating bearing, the linkage rod 64 is coaxial with the reduction turbine 632, the cutter 2 is provided with a yielding hole 24 for the linkage rod 64 to penetrate through, and the yielding hole 24 extends in the vertical direction. One end of the linkage rod 64 penetrates through the speed reducing turbine 632 and is in key connection with the speed reducing turbine 632, the other end of the linkage rod 64 penetrates through the abdicating hole 24 and is in key connection with the transmission gear 65, and the transmission gear 65 is meshed with a driving wheel in the driving wheel 62.

Referring to fig. 5, the power member 63 can drive the worm 631 to rotate, so that the reduction turbine 632, the linkage rod 64 and the transmission gear 65 rotate, and further the driving wheel and the driven wheel rotate to drive the cutter 2 to lift. In the embodiment, when the cutter 2 is lifted, the linkage rod 64 can move relative to the cutter 2 in the abdicating hole 24.

Referring to fig. 3 and 5, the rear pressing assembly 4 includes a rear pressing roller 41 for pressing the paper in cooperation with the tension area 113 and a supporting frame 42 for moving the rear pressing roller 41. The supporting frame 42 includes a stress plate 421 and two connecting plates 422, the length direction of the stress plate 421 is the same as the length direction of the chassis 11, the upper portions of the two connecting plates 422 are respectively fixed at two ends of the stress plate 421, the connecting plates 422 are relatively perpendicular to the stress plate 421, and the rear pressing roller 41 is installed between the two connecting plates 422. Preferably, the stress plate 421 and the connection plate 422 are integrally formed, and the connection plate 422 is formed by bending.

Referring to fig. 3 and 5, the connecting plate 422 is provided with a rotation portion 4221, the rotation portion 4221 has a through hole structure, and the two side standing plates 12 are rotatably connected to the closest rotation portion 4221 by rotation shafts (not shown). The axis of the rear pressure roller 41 is spaced apart from the axis of the rotation part 4221, and when the connection plate 422 rotates, the rear pressure roller 41 can swing around the rotation part 4221, thereby causing the rear pressure roller 41 to approach the tension zone 113 or to be away from the tension zone 113. In the present embodiment, the rotation portion 4221 is located below the coupling plate 422, and the rotation portion 4221 is located at a side of the rear pressure roller 41 away from the cutter 2.

Referring to fig. 5, in order to enable the rear pressing roller 41 to automatically swing along with the lifting of the cutter 2, the paper cutting device further includes a rear linkage mechanism 7, and the rear linkage mechanism 7 includes a rear elastic member 71 and a rear support block 72, wherein the rear elastic member 71 is used for applying a downward pressure to the force-bearing plate 421, and the rear support block 72 is used for applying an upward supporting force to the force-bearing plate 421 and can move along with the cutter 2.

Referring to fig. 3 and 5, specifically, the number of the rear elastic members 71 is 2, and the rear elastic members 71 are selected as compression springs. In order to keep the rear elastic member 71 in contact with the force-bearing plate 421, the force-bearing plate 421 is provided with two third positioning blocks 4211 for engaging with the lower portion of the rear elastic member 71, and the two rear side plates 142 are respectively provided with two fourth positioning blocks 1421 for engaging with the upper portion of the rear elastic member 71. The third positioning blocks 4211 are protruded from the upper surface of the stress plate 421, and the two fourth positioning blocks 1421 are respectively located above the two third positioning blocks 4211. The fourth positioning block 1421 is perpendicular to the rear plate 142, and one end of the fourth positioning block 1421 away from the side plate 12 protrudes downward, so that the fourth positioning block 1421 and the rear elastic member 71 can be clamped. Two ends of the rear elastic member 71 respectively abut against the force-bearing plate 421 and the fourth positioning block 1421, and are clamped between the force-bearing plate 421 and the rear side plate 142.

Referring to fig. 3 and 5, in the present embodiment, the number of the rear pads 72 is 2, the horizontal heights of the two rear pads 72 are the same, and the two rear pads 72 are integrally formed on the side of the cutter 2 close to the force-bearing plate 421. Under the pushing force of the rear elastic member 71, the upper surface of the rear pad 72 abuts against the lower surface of the force-bearing plate 421. The back pad 72 is disposed between the force plate 421 and the tension section 113, and the height of the back pad 72 limits the height of the back pressure roller 41, and thus the height of the back pad 72 limits the minimum distance between the back pressure roller 41 and the tension section 113.

Referring to fig. 3 and 5, preferably, two clearance holes 114 corresponding to the connecting plate 422 are formed in the chassis 11, and the two clearance holes 114 are respectively communicated with two ends of the cutting area 112. The side of the connecting plate 422 close to the cutter 2 is provided with an abutting surface 4222.

Referring to fig. 3 and 5, when the cutter 2 needs to cut off the paper, the cutter 2 drives the rear support block 72 to descend, and the rear pressing roller 41 gradually swings towards the direction approaching the tensioning area 113 under the thrust of the rear elastic member 71; when the cutter 2 is at the lowest position, the rear pressing roller 41 can press the paper by cooperating with the tensioning area 113, and simultaneously the lower portions of the two connecting plates 422 are respectively accommodated in the two avoiding holes 114, and the contact surface 4222 of the connecting plates 422 can contact the cutter 2. When the cutter 2 needs to cut the paper, the cutter 2 drives the rear supporting block 72 to ascend, the rear pressing roller 41 gradually swings towards the direction far away from the tensioning area 113 under the supporting effect of the rear supporting block 72, and the compression amount of the rear elastic piece 71 is larger and larger.

Referring to fig. 3 and 5, further, the minimum distance between the highest point of the rear pressing roller 41 and the tension area 113 is smaller than the minimum distance between the highest point of the lower pressing plate 32 (refer to fig. 4) and the tension area 111, so that the rear pressing roller 41 can press the paper sheet before the lower pressing plate 32 (refer to fig. 4).

Referring to fig. 4 and 5, in the present embodiment, since the front holder block 52 abuts against the thrust plate 31 and the rear holder block 72 abuts against the force-bearing plate 421, when the cutting knife 2 is about to be displaced in the horizontal direction, the cutting knife 2 is prevented from moving in the horizontal direction by the static friction force of the thrust plate 31 and the force-bearing plate 421, so that the lifting of the cutting knife 2 is prevented from being more stable.

Referring to fig. 3 and 5, further, the longitudinal section of the rear pressure roller 41 is circular, and the circumferential side of the rear pressure roller 41 forms a tension friction surface 411. The back press roller 41 is coaxially connected with a connecting shaft 43, the connecting shaft 43 and the back press roller 41 are circumferentially fixed, and the back press roller 41 is hinged with the two connecting plates 422 through the connecting shaft 43. The tensioning driving component 8 is arranged between the cutter 2 and the supporting frame 42, when the cutter 2 descends, the tensioning driving component 8 can drive the rear pressing roller 41 to rotate, one end, close to the rear pressing roller 41, of the paper tends to move towards the pressing area 111, and therefore the paper is not prone to being wrinkled in the process of being cut off.

Referring to fig. 3 and 5, in order to connect the connecting shaft 43 to the tensioning driving assembly 8, the two side vertical plates 12 are respectively provided with a swing hole 124 through which two ends of the connecting shaft 43 pass, and the swing holes 124 extend in an arc shape around the rotating portion 4221, so that the connecting shaft 43 can automatically move in the swing holes 124 when swinging.

Referring to fig. 3 and 5, in particular, the tensioning drive assembly 8 comprises a tensioning drive gear 81 and a tensioning drive rack 82 engageable with said tensioning drive gear 81. The number of the tension driving gears 81 is 2, and the two tension driving gears 81 are respectively installed at two ends of the connecting shaft 43 exposed to the two swing holes 124.

Referring to fig. 3 and 5, specifically, one end of the limiting plate 21, which is far away from the cutting knife 2, is exposed to the corresponding limiting groove 123, and is fixedly connected with the linkage plate 25 for driving the tensioning driving rack 82 to move. In this embodiment, the linkage plate 25, the limiting plate 21 and the cutter 2 are integrally formed, wherein the linkage plate 25 is formed by bending the end of the limiting plate 21 exposed out of the limiting groove 123 by 90 degrees toward the direction close to the front pressing member 3, and the front support block 52 is integrally formed at the lower part of the linkage plate 25 close to the side of the thrust plate 31.

Referring to fig. 3 and 5, the tension drive rack 82 is bolted to the linkage plate 25 with the teeth of the tension drive rack 82 facing the tension drive gear 81 and with the tension drive rack 82 spaced from the tension drive gear 81 without complete meshing when the cutter 2 is in the uppermost position. When the rear pressing roller 41 moves to a position where it can abut against the tension area 113, the tension driving rack 82 is engaged with the tension driving gear 81, and at this time, if the cutter blade 2 drives the tension driving rack 82 to continuously descend, the tension driving rack 82 drives the tension driving gear 81 and the rear pressing roller 41 to rotate, and the friction force generated between the tension friction surface 411 and the paper sheet along with the rotation of the rear pressing roller 41 can maintain the tension state when the paper sheet is cut. When the cutter 2 lifts the tension driving rack 82, the tension driving gear 81 swings in a direction away from the tension driving rack 82, and gradually moves away from the tension driving rack 82.

Referring to fig. 5, it can be understood that the tension of the paper by the back pressure roller 41 is generated by rotating in order that the paper is not easily creased when the cutter 2 contacts the paper, and therefore, the tension of the paper by the back pressure roller 41 can be appropriately reduced before the paper contacts the cutter 2 to reduce the damage of the friction force to the paper or the surface of the back pressure roller 41. In this embodiment, by increasing the swing of the tension driving gear 81, when the cutter 2 starts to descend from the highest position, the tension driving gear 81 does not rotate greatly immediately, the rear pressing roller 41 only provides a pressing effect on the paper, only before the cutter 2 is about to contact the paper, the tension driving rack 82 is engaged with the tension driving gear 81, and the rear pressing roller 41 rotates positively along with the descending of the cutter 2.

Referring to fig. 5, further, in order to prevent the back pressure roller 41 from reversely rotating when the cutter 2 finishes cutting the paper and thus the cut paper is forced to move toward the front pressing member 3, a one-way transmission bearing 83 is provided between the tension driving gear 81 and the connection shaft 43. When the tensioning driving rack 82 descends, the rotation of the tensioning driving gear 81 can drive the connecting shaft 43 to rotate; when the tension driving rack 82 ascends, the rotation of the tension driving gear 81 cannot drive the connecting shaft 43 to rotate under the influence of the one-way transmission bearing 83.

Referring to fig. 2, in the present embodiment, the linkage plate 25 can fix the tensioning driving rack 82 and the front support block 52 at the same time, and on the other hand, the two linkage plates 25 are respectively disposed on the two side vertical plates 12 far away from the cutting knife 2, so as to limit the horizontal position of the cutting knife 2, thereby preventing the cutting knife 2 from deviating seriously in the horizontal direction.

Referring to fig. 6 and 7, in the operation of the paper cutting device according to the embodiment of the present application, the following steps are specifically included:

s1, feeding the paper, waiting for the paper to stay in the pressing area 111, the cutting area 112 and the tensioning area 113.

In which the paper can be transported by means of a paper transport device outside the paper cutting device, which needs to transport the paper installation transport direction onto the pressing zone 111, the cutting zone 112 and the tensioning zone 113 of the chassis 11 and to align the preset cutting position of the paper with the position of the cutting zone 112.

S2, a paper pressing step, the driving wheel 62 rotates to lower the cutting blade 2 from the original height to the first height.

Wherein, the original height is the height of the cutter 2 at the highest position, and the first height is smaller than the original height.

When the cutter 2 is at the original height, there is a space between the front pressing member 3 and the pressing area 111, a space between the cutter 2 and the cutting area 112, and a space between the rear pressing roller 41 and the tension area 113 to form a paper feeding path for feeding paper through the frame 1, and the tension driving rack 82 and the tension driving gear 81 are not completely engaged.

When the cutting knife 2 descends, the front pressing piece 3, the rear pressing roller 41 and the tensioning driving gear 81 swing along with the movement of the cutting knife 2, and the tensioning driving rack 82 descends along with the movement of the cutting knife 2.

When the cutter 2 is at the first height, a gap exists between the cutter 2 and the paper, the front pressing part 3 and the pressing area 111 respectively press against two sides of the paper, the rear pressing roller 41 and the tensioning area 113 respectively press against two sides of the paper, so that the parts of the paper close to two sides of the cutting area 112 are pressed, the paper feeding channel is closed, and the tensioning driving rack 82 and the tensioning driving gear 81 are completely meshed. In this embodiment, the rear pressing roller 41 and the tension area 113 press the sheets before the front pressing member 3 and the pressing area 111.

S3, a tension cutting step, the driving wheel 62 rotates to lower the cutting knife 2 from the first height to the second height.

Wherein the second height is the height at which the cutting blade 2 is located at the lowermost position, and the drive wheel 62 rotates 180 ° when the cutting blade 2 is lowered from the original height to the second height.

When the cutter 2 descends from the first height, the horizontal heights of the front pressing piece 3 and the rear pressing roller 41 are unchanged, the tensioning driving rack 82 descends due to the movement of the cutter 2, the tensioning driving gear 81 rotates along with the descending of the tensioning driving rack 82, and the rear pressing roller 41 is driven to rotate. When the rear pressing roller 41 rotates, the rear pressing roller 41 abuts against the paper, and the friction force between the rear pressing roller 41 and the paper causes the paper to have a tendency to move continuously in the transport direction, and cooperates with the pressing of the front pressing member 3 against the paper, so that the position of the paper aligned with the cutting area 112 is kept in a tensioned state.

When the cutter 2 is at the second height, the cutter head 22 of the cutter 2 passes through the cutting area 112 and cuts the paper, and since the rear pressing roller 41 continuously rotates during the process that the cutter 2 is continuously lowered from the second height, the rear pressing roller 41 can not only keep the paper tensioned when contacting the cutter 2 by friction force, but also can tear out the cut paper.

S4, a lifting reset step, the driving wheel 62 rotates to raise the cutting knife 2 from the second height to the original height.

The driving wheel 62 rotates 180 degrees in the same direction, so that the cutter 2 can be lifted from the lowest position to the highest position, and the paper feeding channel is opened again to wait for the next paper cutting.

When the cutter 2 ascends, the front pressing member 3, the rear pressing roller 41 and the tension driving gear 81 swing following the movement of the cutter 2, and the tension driving rack 82 ascends following the movement of the cutter 2. Under the action of the one-way transmission bearing 83, since the return direction of the cutter 2 is opposite to the direction in which the cut paper was previously cut, the reverse rotation of the tension driving gear 81 does not rotate the rear pressure roller 41.

The implementation principle of the first embodiment of the application is as follows: when the cutter 2 descends to cut the paper, the front pressing piece 3 and the rear pressing roller 41 can move along with the descending of the cutter 2, so that the paper can be tensioned before contacting the cutter 2. Wherein, back compression roller 41 can follow the decline of cutter 2 and take place to rotate, will cut off the paper at cutter 2 to the in-process that cuts off the paper completely, and casting die 3 can make the paper keep the tension state before the cooperation of back compression roller 41, reduces the paper because the fold that takes place by the conflict of cutter 2, and the cutting off position is more accurate, is applicable to the cutting off of the great paper of thickness.

The rear pressing roller 41 can tear the paper through the friction force generated by rotation, the cutter head 22 can cut the paper from the middle of the paper, and the paper is more easily cut by the cutter 2 after being split at the middle under the tearing action of the rear pressing roller 41, so that the cutting speed is higher; on the other hand, the rotation of the rear pressing roller 41 can make the completely cut paper quickly separate from the frame 1 to finish the paper output, and is particularly suitable for scenes such as lottery tickets, movie tickets and the like, which need to be cut accurately without damaging the content of the tickets and have extremely high requirements on the working stability and the working efficiency.

The front pressing piece 3 moves in a swinging mode, when the front pressing piece 3 is abutted to the paper, the contact part approaches to a straight line, so that the contact area of the front pressing piece 3 and the paper is reduced, and the position deviation of the paper under the action of the rear pressing roller 41 under the condition of not cutting off the paper is reduced.

By utilizing the swinging mode of the tension driving gear 81, the tension driving gear 81 and the tension driving rack 82 are separated and can be separated, a time difference is formed between the time point when the rear pressing roller 41 presses the paper and the time point when the rear pressing roller 41 tensions the paper, the tension of the rear pressing roller 41 on the paper before the cutting knife 2 actually contacts the paper is reduced, on one hand, the damage of the friction force generated by the rotation of the rear pressing roller 41 on the rear pressing roller 41 or the paper is reduced, and on the other hand, the risk of position deviation of the paper under the tension action before the paper contacts the cutting knife 2 is reduced.

Example two

Referring to fig. 8, the difference between the embodiment of the present application and the first embodiment is: the lower end of the cutting knife 2 is provided with a sharp edge 26, a bottom edge 1121 is bolted in the cutting area 112, and the position of the bottom edge 1121 corresponds to the position of the sharp edge 26.

The implementation principle of the second embodiment of the present application is as follows: when the cutting knife 2 descends to the lowest position, the sharp edge 26 and the bottom edge 1121 can cooperate to cut off the paper at the cutting area 112, which is more suitable for cutting off the paper without easy-tear strips, and the cut is smoother.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.