1. A sheet feeding apparatus comprising:

the box body is provided with an accommodating cavity;

the paper box is positioned in the accommodating cavity, the paper box can be moved out of the accommodating cavity by pulling the paper box, and the paper box can be pushed into the accommodating cavity by pushing the paper box;

a damping portion adapted to apply a resistance to the carton during movement;

it is characterized by also comprising:

a detection unit adapted to detect carton information;

and the control part controls the resistance applied by the damping part to the paper box or the opening time of the damping part according to the paper box information detected by the detection unit.

2. The sheet feeding apparatus according to claim 1, wherein the cassette information includes a cassette moving speed, a cassette position, or a cassette weight.

3. The paper feeding apparatus according to claim 2, wherein when the paper cassette information is a paper cassette moving speed, the larger the resistance force the damping portion applies to the paper cassette.

4. The paper feeding apparatus according to claim 2, wherein when the paper cassette information is a paper cassette weight, the larger the paper cassette weight, the larger resistance the damping portion exerts on the paper cassette.

5. The paper feeding apparatus according to claim 2, wherein when the paper cassette information is a paper cassette position, the paper cassette moves to the housing chamber at a first predetermined position, and the control portion opens the damping portion.

6. The paper feeding apparatus according to claim 2, wherein said control portion receives the paper cassette information detected by said detecting unit from time to control the opening of said damping portion.

7. The sheet feeding apparatus according to claim 2, further comprising:

a storage portion adapted to store a correspondence table of resistance values and paper cassette information;

the control part also controls the resistance value applied to the paper box by the damping part or the opening time of the damping part according to the resistance value and the paper box information corresponding table.

8. The sheet feeding apparatus according to claim 2, wherein the resistance of the damping portion to the movement of the sheet cassette can be continuously changed.

9. The sheet feeding apparatus according to claim 1, characterized in that the number of the damping portions is one or more; when the number of the damping parts is one, the damping parts are positioned on one side of the paper box; when the number of the damping parts is multiple, the damping parts are distributed on two sides of the paper box.

10. The paper feeding apparatus according to claim 9, characterized in that the damping portion includes:

the track is positioned on the outer wall of the paper box, extends from one end of the paper box to the other end of the paper box along the moving direction of the paper box, and is provided with a plurality of first teeth;

the damping wheel is arranged on the inner wall of the accommodating cavity and provided with a plurality of second teeth, and the second teeth are meshed with the first teeth.

11. The paper feeding apparatus according to claim 5, wherein when said paper cassette information is a paper cassette position, said paper cassette is moved to said housing chamber at a second predetermined position, and said control portion closes said damping portion.

12. The paper feeding apparatus according to claim 2, wherein the paper cassette information further includes a paper cassette movement acceleration, and the control portion controls the amount of resistance applied to the paper cassette by the damping portion or the opening time of the damping portion based on the paper cassette movement acceleration detected by the detection unit.

13. An image forming apparatus, characterized by comprising the sheet feeding apparatus according to claims 1 to 12.

Background

In the existing paper feeding apparatus, the paper feeding apparatus includes: the box body is provided with an accommodating cavity; the paper box is positioned in the accommodating cavity, the paper box can be moved out of the accommodating cavity by pulling the paper box, and the paper box can be pushed into the accommodating cavity by pushing the paper box; a damping portion adapted to apply a resistance to the carton during movement.

The damping portion can apply resistance to the paper cassette only on a part of the moving path during the whole moving process of the paper cassette, and the resistance applied to the paper cassette by the damping portion is constant. The damping effect of damping portion is poor, is difficult to effectively reduce the risk that bumps between box and box, and the user outwards pull during the carton, because the carton receives on partial moving path the resistance that damping portion applyed leads to that user's pull carton operation is hard, influences user experience.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to improve a damping effect of the damping portion, reduce a collision between a paper cassette and a box body, and reduce a difficulty of drawing the paper cassette by a user.

To solve the above problem, the present invention provides a paper feeding apparatus having: the box body is provided with an accommodating cavity; the paper box is positioned in the accommodating cavity, the paper box can be moved out of the accommodating cavity by pulling the paper box, and the paper box can be pushed into the accommodating cavity by pushing the paper box; a damping portion adapted to apply a resistance to the carton during movement; a detection unit adapted to detect carton information; and the control part controls the resistance applied by the damping part to the paper box or the opening time of the damping part according to the paper box information detected by the detection unit.

The inventor of the present invention has found through intensive research that the detection unit detects carton information, the control portion regulates and controls the damping portion according to the detected carton information, and adjusts the resistance applied by the damping portion to the carton or the opening time of the damping portion, so that the damping applied by the damping portion is more accurate, which is beneficial to improving the damping effect of the damping portion, reducing the collision between the carton and the box body, and reducing the difficulty of drawing the carton by a user.

In the above paper feeding apparatus, the paper cassette information includes a paper cassette moving speed, a paper cassette position, or a paper cassette weight.

Therefore, the resistance applied by the damping part to the paper box or the opening time of the damping part is synchronously adjusted along with the change of the moving speed of the paper box, the position of the paper box or the weight of the paper box, so that the damping applied by the damping part is accurately matched with the state of the paper box, and the damping effect of the damping part is further improved.

In the above paper feeding apparatus, when the paper cassette information is a paper cassette moving speed, the greater the resistance applied to the paper cassette by the damping portion.

Therefore, the detection unit detects the moving speed of the paper box, and the control part regulates and controls the damping part. The larger the moving speed of the paper box is, the larger the resistance applied to the paper box by the damping part is, so that the damping part can timely reduce the moving speed of the paper box under the state that the moving speed of the paper box is high, and the risk of collision between the paper box and the box body is reduced. In addition, in a state that the moving speed of the paper box is low, the resistance applied to the paper box by the damping part is reduced, so that the energy consumption of the damping part is reduced.

In the above paper feeding apparatus, when the paper cassette information is a paper cassette weight, the resistance applied to the paper cassette by the damping portion increases as the paper cassette weight increases.

The greater the weight of the carton, the greater the inertia of the carton during the movement of the carton and thus the greater the resistance required to slow down the speed of movement of the carton. Therefore, the detection unit detects the weight of the paper box, and the larger the weight of the paper box is, the larger the resistance applied to the paper box by the damping part is, so that the moving speed of the paper box is effectively reduced in the moving process of the paper box, and the risk of collision between the paper box and the box body is reduced.

In the above paper feeding device, when the paper box information is the paper box position, the paper box moves to the first preset position of the accommodating cavity, and the control part opens the damping part.

Therefore, when the paper box moves to the first preset position of the accommodating cavity, the damping part exerts resistance on the paper box so as to reduce the moving speed of the paper box, and on one hand, the damping part helps to prevent the paper box from colliding with the inner wall of the accommodating cavity; on the other hand, the energy consumption of the damping part is reduced.

In the above paper feeding device, the control portion receives the paper cassette information detected by the detection unit from time to control the opening of the damping portion.

Therefore, the duration of the resistance exerted on the paper box by the damping part is changed along with the change of the paper box information, so that the accurate control of the motion state of the paper box is realized.

In the above paper feeding apparatus, further comprising: a storage portion adapted to store a correspondence table of resistance values and paper cassette information; the control part also controls the resistance value applied to the paper box by the damping part or the opening time of the damping part according to the resistance value and the paper box information corresponding table.

Therefore, the control part can perform proper regulation and control operation on the damping part. Under the same carton information state, the control part carries out the same regulation and control operation on the damping part according to the resistance value and the carton information corresponding table, thereby being beneficial to shortening the regulation and control time while ensuring the regulation and control effect.

In the above paper feeding apparatus, the resistance applied by the damping portion to the movement of the paper cassette can be continuously changed.

Therefore, the resistance force applied to the paper box by the damping part continuously changes along with the change of the paper box information, and the motion state of the paper box is favorably and accurately controlled.

In the above paper feeding apparatus, the number of the damping portions is one or more; when the number of the damping parts is one, the damping parts are positioned on one side of the paper box; when the number of the damping parts is multiple, the damping parts are distributed on two sides of the paper box.

When the number of the damping portions is one, the damping portions are located at one side of the paper cassette, whereby the damping portions can apply resistance to the paper cassette, thereby reducing the moving speed of the paper cassette.

Moreover, when the number of the damping parts is multiple, the damping parts are distributed on two sides of the paper box, so that the two sides of the paper box are subjected to resistance exerted by the damping parts, and the risk of inclination of the paper box in the moving process is reduced.

In the above paper feeding apparatus, the damping portion includes: the track is positioned on the outer wall of the paper box, extends from one end of the paper box to the other end of the paper box along the moving direction of the paper box, and is provided with a plurality of first teeth; the damping wheel is arranged on the inner wall of the accommodating cavity and provided with a plurality of second teeth, and the second teeth are meshed with the first teeth.

The track extends from one end of the paper box to the other end of the paper box along the moving direction of the paper box, so that the damping part can apply resistance to the paper box in the whole moving process of the paper box, all moving states of the paper box are regulated and controlled by the damping part, and the moving state of the paper box is accurately controlled.

In the above paper feeding device, when the paper box information is the paper box position, the paper box moves to the second preset position of the accommodating cavity, and the control part closes the damping part.

Therefore, when the paper box moves to the second preset position of the accommodating cavity, the control part closes the damping part so as to remove the resistance applied to the paper box by the damping part, so that the difficulty of drawing the paper box outwards by a user is reduced, and the operation of the user is facilitated.

In the above paper feeding device, the paper cassette information further includes a paper cassette movement acceleration, and the control portion controls the resistance applied to the paper cassette by the damping portion or the opening time of the damping portion according to the paper cassette movement acceleration detected by the detection portion.

The greater the acceleration of the movement of the paper cassette during the movement of the paper cassette, the greater the resistance required to reduce the speed of the movement of the paper cassette. The control part controls the resistance applied by the damping part to the paper box or the opening time of the damping part according to the paper box moving acceleration detected by the detection unit, so that the moving speed of the paper box can be effectively reduced, and the damping effect of the damping part is improved.

Further, the paper feeding apparatus of the present invention can be applied to an image forming apparatus, and can thereby bring about the effects described above.

Drawings

FIG. 1 is a schematic view of a paper feeding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of a damping wheel of the paper feeding device shown in FIG. 1;

FIG. 3 is a schematic view of another damping wheel of the paper feeding device shown in FIG. 1;

FIG. 4 is a schematic view of a paper feeding apparatus according to another embodiment of the present invention;

FIG. 5 is an enlarged schematic view of region A shown in FIG. 4;

FIG. 6 is an enlarged schematic view of region B shown in FIG. 4;

fig. 7 is a schematic diagram of an image forming apparatus according to an embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Further, it will be apparent to those skilled in the art that many alternatives thereof are possible in light of the above disclosure, and that the present invention is not limited to the preferred embodiments described herein.

Hereinafter, a specific configuration of the reading apparatus of the present invention will be described in detail.

Referring to fig. 1, a paper feeding apparatus 100 includes: a case 110, the case 110 having an accommodating chamber; the paper box 120 is positioned in the accommodating cavity, the paper box 120 can be moved out of the accommodating cavity by pulling the paper box 120, and the paper box 120 can be pushed into the accommodating cavity by pushing the paper box 120; a damping portion adapted to apply a resistance to the paper cassette 120 during movement; a detection unit adapted to detect carton information; and a control part for controlling the resistance applied by the damping part to the paper box 120 or the opening time of the damping part according to the paper box information detected by the detection unit.

Through examine and examine unit detection carton information, according to the carton information that detects, the control part is right the damping portion regulates and control, adjusts the damping portion to the resistance size or the opening time of damping portion that carton 120 applyed, makes the damping that the damping portion applyed is more accurate, helps improving the damping effect of damping portion reduces the collision between carton 120 and box 110, and reduces user's pull carton 120's the degree of difficulty.

The paper cassette information includes a paper cassette moving speed, a paper cassette position, or a paper cassette weight.

Therefore, the resistance applied by the damping part to the paper box 120 or the opening time of the damping part is synchronously adjusted along with the change of the moving speed of the paper box, the position of the paper box or the weight of the paper box, so that the damping applied by the damping part is accurately matched with the state of the paper box 120, and the damping effect of the damping part is further improved.

In this embodiment, the damping portion includes: a rail 210, wherein the rail 210 is located on the outer wall of the paper box 120, the rail 210 extends from one end of the paper box 120 to the other end along the moving direction of the paper box 120, and the rail 210 has a plurality of first teeth; the damping wheel 300 is arranged on the inner wall of the accommodating cavity, and the damping wheel 300 is provided with a plurality of second teeth which are meshed with the first teeth.

The rail 210 extends from one end to the other end of the paper box 120 along the moving direction of the paper box 120, so that the damping part can apply resistance to the paper box 120 in the whole moving process of the paper box 120, and all moving states of the paper box 120 are regulated and controlled by the damping part, thereby realizing accurate control of the moving state of the paper box 120.

In this embodiment, the carton 120 has a top wall, a bottom wall, a front wall, a back wall, and two opposing side walls. A handle 121 is provided on the front wall to allow a user to push and pull the paper cassette 120.

In this embodiment, the rail 210 has a rack structure. The rail 210 is fixedly disposed on a side wall of the paper box 120, extends from a rear wall of the paper box 120 to a front wall of the paper box 120, and an extending direction of the rail 210 is perpendicular to a surface of the rear wall of the paper box 120.

Referring to fig. 2, in the present embodiment, the damping portion further includes: the damping wheel 300 is sleeved at one end of the damping shaft 400, the other end of the damping shaft 400 is fixedly arranged on the inner wall of the accommodating cavity, the damping shaft 400 extends along the surface perpendicular to the side wall of the paper box 120, and the damping wheel 300 can rotate relative to the damping shaft 400.

The rail 210 is engaged with the damping wheel 300, the damping wheel 300 can exert a damping effect on the rail 210, and the damping portion can exert a resistance force on the paper cassette 120 during the movement of the paper cassette 120 to reduce the movement speed of the paper cassette 120 because the rail 210 is fixedly arranged on the paper cassette 120.

In this embodiment, the damping portion is an electromagnetic damper. The control part controls the rotation speed of the damping wheel 300 with respect to the damping shaft 400 to control the amount of resistance applied to the paper cassette 120 by the damping part and the opening time of the damping part.

The number of the damping parts is one or more; when the number of the damping parts is one, the damping parts are located at one side of the paper box 120; when the number of the damping portions is plural, the damping portions are disposed at both sides of the paper cassette 120.

When the number of the damping portions is one, the damping portions are located at one side of the paper cassette 120, and thus, the damping portions can apply resistance to the paper cassette 120, thereby reducing the moving speed of the paper cassette 120.

Moreover, when the number of the damping portions is multiple, the damping portions are disposed on two sides of the paper box 120, so that the two sides of the paper box 120 are subjected to the resistance exerted by the damping portions, which is beneficial to reducing the risk of the paper box 120 tilting during the moving process.

Referring to fig. 3, in another embodiment, the damping wheel 300 includes a first sub-damping wheel 310 and a second sub-damping wheel 320, the damping shaft 400 includes a first sub-damping shaft 410 and a second sub-damping shaft 420 arranged in parallel at an interval, the first sub-damping wheel 310 is sleeved on one end of the first sub-damping shaft 410, the second sub-damping wheel 320 is sleeved on one end of the second sub-damping shaft 420, the first sub-damping wheel 310 can rotate relative to the first sub-damping shaft 410, and the second sub-damping wheel 320 can rotate relative to the second sub-damping shaft 420.

The damping portion further includes: the first connecting wheel 510 is fixedly sleeved on the first sub-damping shaft 410, the first connecting wheel 510 is located at the other end opposite to the first sub-damping wheel 310, the second connecting wheel 520 is fixedly sleeved on the second sub-damping shaft 420, and the second connecting wheel 520 is located at the other end opposite to the second sub-damping wheel 320.

The control part comprises a first sub-control part and a second sub-control part, the first sub-control part comprises a first clutch 610 and a first rotating shaft 631, the first clutch 610 is sleeved on the first rotating shaft 631, one end of the first rotating shaft 631 is fixedly arranged on the inner wall of the accommodating cavity, and the first clutch 610 is engaged with the first connecting wheel 510; the second sub-control portion includes a second clutch 620 and a second rotating shaft 632, the second clutch 620 is sleeved on the second rotating shaft 632, two ends of the second rotating shaft 632 are fixedly disposed on the inner wall of the accommodating cavity, and the second clutch 620 is engaged with the second connecting wheel 520.

When the first clutch 610 is opened, the first clutch 610 is stationary with respect to the first rotation shaft 631 such that the first connecting wheel 510 is in a fixed position and is stationary, and the first sub-damping shaft 410 is in a stationary state because the first connecting wheel 510 is fixedly connected with the first sub-damping shaft 410. At this time, the first sub damping wheel 310 rotates axially relative to the first sub damping shaft 410, the first sub damping wheel 310 is engaged with the rail 210, and the first sub damping wheel 310 can apply resistance to the rail 210 in a moving state, so that the first sub damping wheel 310 applies resistance to the paper cassette 120 to reduce the moving speed of the paper cassette.

When the first clutch 610 is closed, the first clutch 610 can rotate around the first rotating shaft 631 and drive the first connecting wheel 510 and the first sub-damping shaft 410 to rotate, and the first sub-damping shaft 410 and the first sub-damping wheel 310 rotate synchronously, so that the rotating speed of the first sub-damping wheel 310 relative to the first sub-damping shaft 410 is zero. At this time, the resistance of the first sub-damping wheel 310 to the rail 210 is small or even negligible.

When the second clutch 620 is opened, the second clutch 620 is stationary relative to the second rotating shaft 632, such that the second connecting wheel 520 is in a fixed position and is not moved, and the second sub-damping shaft 420 is in a stationary state because the second connecting wheel 520 is fixedly connected with the second sub-damping shaft 420. At this time, the second sub damping wheel 320 rotates axially relative to the second sub damping shaft 420, the second sub damping wheel 320 is engaged with the rail 210, and the second sub damping wheel 320 can apply resistance to the rail 210 in a moving state, so that the second sub damping wheel 320 applies resistance to the paper cassette 120 to reduce the moving speed of the paper cassette.

When the second clutch 620 is closed, the second clutch 620 may rotate around the second rotating shaft 632, and drive the second connecting wheel 520 and the second sub-damping shaft 420 to rotate, and the second sub-damping shaft 420 and the second sub-damping wheel 320 rotate synchronously, so that the rotating speed of the second sub-damping wheel 320 relative to the second sub-damping shaft 420 is zero. At this time, the resistance of the second sub-damping wheel 320 to the rail 210 is small or even negligible.

When the first clutch 610 and the second clutch 620 are simultaneously opened, the resistance force applied to the paper cassette 120 by the damping portion acts as a first resistance force. When the first clutch 610 is closed and the second clutch 620 is opened, or when the first clutch 610 is opened and the second clutch 620 is closed, the resistance force applied to the paper cassette 120 by the damper portion acts as a second resistance force, which is smaller than the first resistance force. When the first clutch 610 and the second clutch 620 are closed at the same time, the damper portion loses resistance to the movement of the paper cassette 120.

Thereby, the control portion controls the amount of resistance applied to the paper cassette 120 by the damper portion and the opening time of the damper portion.

Fig. 4 is a schematic diagram of a paper feeding apparatus 100 according to another embodiment of the present invention. FIG. 5 is an enlarged schematic view of region A shown in FIG. 4; fig. 6 is an enlarged schematic view of the region B shown in fig. 4.

Referring to fig. 4 and 5, the damping part includes: a rail 210, the rail 210 being located on an outer wall of the carton 120; the damping wheel 300 is arranged on the inner wall of the accommodating cavity, and the damping wheel 300 comprises a first sub damping wheel 310 and a second sub damping wheel 320; the damping device comprises a first sub-damping shaft 410 and a second sub-damping shaft 420 which are arranged in parallel at intervals, wherein the first sub-damping wheel 310 is sleeved at one end of the first sub-damping shaft 410, and the second sub-damping wheel 320 is sleeved at one end of the second sub-damping shaft 420; a first connecting wheel 510 and a second connecting wheel 520, the first connecting wheel 510 being located at the other end opposite to the first sub damping wheel 310, the second connecting wheel 520 being located at the other end opposite to the second sub damping wheel 320.

The control part comprises a first sub-control part and a second sub-control part, the first sub-control part comprises a first clutch 610 and a first rotating shaft 631, the first clutch 610 is sleeved on the first rotating shaft 631, one end of the first rotating shaft 631 is fixedly arranged on the inner wall of the accommodating cavity, and the first clutch 610 is engaged with the first connecting wheel 510; the second sub-control portion includes a second clutch 620 and a second rotating shaft 632, the second clutch 620 is sleeved on the second rotating shaft 632, two ends of the second rotating shaft 632 are fixedly disposed on the inner wall of the accommodating cavity, and the second clutch 620 is engaged with the second connecting wheel 520.

Referring to fig. 4 and 6, the damping part further includes: the auxiliary damping member 700, the auxiliary damping member 700 includes an auxiliary damping wheel 710 and an auxiliary damping shaft 720, the auxiliary damping wheel 710 is sleeved on one end of the auxiliary damping shaft 720, the other end of the auxiliary damping shaft 720 penetrates through the side wall of the box body 110, the auxiliary damping shaft 720 extends along a direction perpendicular to the side wall of the paper box 120, the auxiliary damping wheel 710 can rotate relative to the auxiliary damping shaft 720, and the auxiliary damping shaft 720 can move along the axial direction relative to the box body 110; the spring 730, the spring 730 is sleeved on the auxiliary damping shaft 720; the sleeve 740 is sleeved on the auxiliary damping shaft 720, the sleeve 740 surrounds the spring 730, the sleeve 740 is fixedly arranged on the inner wall of the accommodating cavity, a clamping groove is formed in the inner wall of the sleeve 740, a protrusion is arranged on the surface of the auxiliary damping shaft 720, and the protrusion is matched with the clamping groove; and the pressing plate 750 is movably connected with the outer wall of the box body 110, and the pressing plate 750 is suitable for pressing the end part of the auxiliary damping shaft 720 exposed out of the outer wall of the box body 110.

In the non-operating state, along the axial direction of the auxiliary damping wheel 710, there is a gap between the auxiliary damping wheel 710 and the rail 210, and there is no interaction between the auxiliary damping wheel 710 and the rail 210.

When the auxiliary damping member 700 needs to be activated, the pressing plate 750 is pressed to move the auxiliary damping shaft 720 in the axial direction toward the rail 210, and drive the auxiliary damping wheel 710 to move toward the rail 210, so that the auxiliary damping wheel 710 is engaged with the rail 210. During the axial movement of the auxiliary damping shaft 720, the spring 730 is compressed, and the protrusion is clamped into the clamping groove, so that the auxiliary damping shaft 720 is fixed in position and kept engaged with the rail 210. The auxiliary damping wheel 710 is engaged with the rail 210, and the auxiliary damping wheel 710 can apply a resistance to the paper cassette 120 during the movement of the paper cassette 120 to reduce the movement speed of the paper cassette 120.

When the auxiliary damping member 700 needs to be closed, the pressing plate 750 is pressed again to separate the protrusion from the slot, the spring 730 starts to extend from a contracted state, the auxiliary damping shaft 720 drives the auxiliary damping wheel 710 to move away from the rail 210 under the action of the elastic force applied by the spring 730, and the auxiliary damping wheel 710 is separated from the rail 210. In the axial direction of the auxiliary damping wheel 710, there is a gap between the auxiliary damping wheel 710 and the rail 210, so as to remove the resistance effect of the auxiliary damping wheel 710 on the paper cassette 120.

As a result, as shown in fig. 6, the control unit controls the damper unit mechanically, and ensures that the damper unit can still operate even in the event of a power failure.

As shown in fig. 1, in this embodiment, the detecting unit includes: a speed sensor 810, wherein the speed sensor 810 is arranged on the inner wall of the accommodating cavity corresponding to the side wall of the paper box 120.

The speed sensor 810 functions to detect the moving speed of the paper cassette 120.

When the paper cassette information is the moving speed of the paper cassette 120, the greater the resistance applied to the paper cassette 120 by the damping portion.

Therefore, the detection unit detects the moving speed of the paper box, and the control part regulates and controls the damping part. The greater the paper cassette moving speed, the greater the resistance that the damping portion exerts on the paper cassette 120, so that the damping portion can reduce the paper cassette moving speed in time in a state where the paper cassette moving speed is high, thereby reducing the risk of collision between the paper cassette 120 and the case 110. Further, in a state where the moving speed of the sheet cassette is small, the resistance applied to the sheet cassette 120 by the damper portion is reduced to reduce the energy consumption of the damper portion.

In this embodiment, the detecting unit further includes: and position sensors including a first position sensor 821 and a second position sensor 822, wherein the first position sensor 821 is disposed on the inner wall of the receiving cavity corresponding to the rear wall of the paper box 120, and the second position sensor 822 is disposed on the inner wall of the receiving cavity corresponding to the side wall of the paper box 120.

In this embodiment, the number of the second position sensors 822 is two, and the two second position sensors 822 are respectively located at two sides of the paper box 120 and are oppositely disposed.

In this embodiment, in a state where the paper cassette 120 is completely pushed into the accommodating cavity, the second position sensor 822 on the same side as the speed sensor 810 is located between the speed sensor 810 and the rear wall of the paper cassette 120.

The control part receives the paper box information detected by the detection unit at any time so as to control the opening of the damping part.

Thus, the duration of the resistance force applied to the paper cassette 120 by the damping portion varies with the change of the paper cassette information to achieve precise control of the moving state of the paper cassette 120.

In the process of pulling the carton 120 out of the accommodating cavity, the damping part does not apply resistance to the carton 120 in the initial stage so as to reduce the difficulty of the user pulling the carton 120. When the rear wall of the paper cassette 120 moves to the second position sensor 822, the control portion opens the damping portion, which applies resistance to the paper cassette 120 to reduce the moving speed of the paper cassette 120. When the speed sensor 810 detects that the moving speed of the paper box 120 is reduced to zero, the control part closes the damping part, and the paper box 120 continues to move out of the accommodating cavity under the drawing action of the user.

The damping portion does not apply resistance to the paper cassette 120 at the initial stage in the process of pushing the paper cassette 120 out of the receiving cavity into the receiving cavity to reduce the difficulty of the user pushing the paper cassette 120. When the rear wall of the paper box 120 moves to the second position sensor 822, the control portion opens the damping portion, and the damping portion applies resistance to the paper box 120 to reduce the moving speed of the paper box 120, so as to prevent the rear wall of the paper box 120 from colliding with the inner wall of the receiving cavity, thereby protecting the paper box 120. When the first position sensor 821 detects that the distance from the rear wall of the paper box 120 is a predetermined distance, it is determined that the paper box 120 is completely pushed into the accommodating chamber, and the control portion closes the damping portion, thereby removing the resistance applied to the paper box 120 by the damping portion.

In another embodiment, when the paper box information is the position of the paper box 120, the paper box 120 moves to the first predetermined position of the accommodating cavity, and the control part opens the damping part. The paper box 120 moves to the second preset position of the accommodating cavity, and the control part closes the damping part.

Thereby, when the paper box 120 moves to the first preset position of the accommodating cavity, the damping part exerts resistance on the paper box 120 to reduce the moving speed of the paper box 120, on one hand, the damping part helps to prevent the paper box 120 from colliding with the inner wall of the accommodating cavity; on the other hand, the energy consumption of the damping part is reduced.

Furthermore, when the paper box 120 moves to the second predetermined position of the accommodating cavity, the control part closes the damping part to remove the resistance applied by the damping part to the paper box 120, which is beneficial to reducing the difficulty of the user when pulling the paper box 120 outwards and is convenient for the user to operate.

In another embodiment, the detecting unit further includes: and the weight sensor 830, the weight sensor 830 is arranged on the bottom wall of the paper box 120 and is suitable for detecting the weight of the paper put in the paper box 120.

When the paper cassette information is the weight of the paper cassette 120, the greater the resistance that the damping portion exerts on the paper cassette 120.

The larger the weight of the paper cassette 120, the larger the inertia of the paper cassette 120 during the movement of the paper cassette 120, and thus the larger the resistance required to reduce the moving speed of the paper cassette 120. Therefore, the detecting unit detects the weight of the paper box 120, and the larger the weight of the paper box 120 is, the larger the resistance applied to the paper box 120 by the damping part is, so that the moving speed of the paper box 120 is effectively reduced in the moving process of the paper box 120, and the risk of collision between the paper box 120 and the box body 110 is reduced.

In other embodiments, the carton information further includes: the control part controls the resistance applied by the damping part to the paper box 120 or the opening time of the damping part according to the paper box moving acceleration detected by the detection unit.

The greater the acceleration of the movement of the paper cassette during the movement of the paper cassette 120, the greater the resistance required to reduce the speed of the movement of the paper cassette. The control part controls the resistance applied by the damping part to the paper box 120 or the opening time of the damping part according to the paper box moving acceleration detected by the detection unit, so that the moving speed of the paper box can be effectively reduced, and the damping effect of the damping part can be improved.

Specifically, the detecting unit further includes: and the acceleration sensor is arranged on the inner wall of the accommodating cavity corresponding to the side wall of the paper box 120.

The acceleration sensor functions to detect the moving acceleration of the paper cassette 120, thereby acquiring the moving state of the paper cassette 120 from time to time.

The resistance that the damping portion applies to the movement of the paper cassette 120 can be continuously changed.

Therefore, the resistance exerted by the damping part on the paper box 120 continuously changes along with the change of the paper box information, and the motion state of the paper box 120 is favorably and accurately controlled.

In this embodiment, the paper feeding apparatus 100 further includes: a storage portion adapted to store a correspondence table of resistance values and paper cassette information; the control part also controls the resistance value applied to the paper box 120 by the damping part or the opening time of the damping part according to the corresponding table of the resistance value and the paper box information.

Therefore, the control part can perform proper regulation and control operation on the damping part. Under the same carton information state, the control part carries out the same regulation and control operation on the damping part according to the resistance value and the carton information corresponding table, thereby being beneficial to shortening the regulation and control time while ensuring the regulation and control effect.

Referring to fig. 7, the present invention also provides an image forming apparatus 10 including the above-described paper feeding apparatus 100.

The number of the paper cassettes 120 is one or more. In this embodiment, the number of the paper cassettes 120 is plural.

The above-described paper feeding apparatus 100 can be applied to an image forming apparatus, and can thereby bring about the effects as described above.

The image forming apparatus 10 further includes: a conveying section 30 including a plurality of sets of conveying roller pairs adapted to convey a sheet along a predetermined conveying path; a transfer section 31 adapted to transfer toner onto a sheet; and a fixing section 32 adapted to perform a fixing process on the paper.

The image forming apparatus 10 further includes: a display unit 20 adapted to display the operating states of the paper feeding device 10, the conveying unit 30, the transfer unit 31, and the fixing unit 32, and to display an operation instruction of an operator; and an operation panel 21 adapted for an operator to input an operation instruction.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.