1. The utility model provides a trace inspection measuring device, includes bottom plate (1), bottom plate (1) top is fixed with first fixing base (2) and second fixing base (19), the one side that bottom plate (1) was kept away from in second fixing base (19) is equipped with microscope (23) one or more, its characterized in that: an attraction part (13) is arranged on one surface, far away from the bottom plate (1), of the first fixed seat (2), and an adjusting part for adjusting the position of the attraction part (13) is arranged between the attraction part (13) and the first fixed seat (2);

the suction component (13) comprises a supporting plate (1306) fixed with the adjusting component, a spring plate (1305) is fixed on the other surface of the supporting plate (1306), two ends of the spring plate (1305) are wrapped with a first pulling plate (1301) and a second pulling plate (1303), one surfaces, close to the adjusting component, of the first pulling plate (1301) and the second pulling plate (1303) are respectively provided with a first movable foot (1302) and a second movable foot (1304), and the first movable foot (1302) and the second movable foot (1304) are in sliding connection with the adjusting component; when the first pulling plate (1301) and the second pulling plate (1303) are separated, the spring plate (1305) pops up and is flush with the first pulling plate (1301) and the second pulling plate (1303) in height; the spring plate (1305) is wrapped by the first pulling plate (1301) and the second pulling plate (1303) when the first pulling plate (1301) and the second pulling plate (1303) are closed;

accommodating parts (14) for fixing the material evidence are adsorbed on one surface, away from the adjusting part, of the attraction part (13), and the number of the accommodating parts (14) is consistent with that of the microscopes (23); the accommodating part (14) comprises a polyhedral structure supporting frame (15), and a microscope probe plate (16) for probing a microscope (23) is movably adsorbed on one surface of the structure supporting frame (15); a measurement fixing plate (17) is movably adsorbed on the other surface of the structure supporting frame (15);

the measurement fixing plate (17) comprises a fixing frame (1701) adsorbed by a structure supporting frame (15), a plurality of scale strips (1702) are vertically fixed in the fixing frame (1701) in a staggered mode, a plurality of threaded holes (1703) are formed in each scale strip (1702), and a fixing part (18) with a fixing effect is rotationally connected in each threaded hole (1703).

2. A trace inspection measuring device according to claim 1, wherein: the adjusting component comprises a transverse displacement plate (3) fixed with a first fixing seat (2), a transverse sliding groove (4) is formed in one surface, far away from the first fixing seat (2), of the transverse displacement plate (3), a first sliding strip (6) is movably connected in the transverse sliding groove (4), a longitudinal displacement plate (8) is fixed on one surface, far away from the transverse sliding groove (4), of the first sliding strip (6), and the first sliding strip (6) slides in the transverse sliding groove (4) when the longitudinal displacement plate (8) is adjusted;

one side, far away from the first sliding strip (6), of the longitudinal displacement plate (8) is provided with a longitudinal sliding groove (9) perpendicular to the transverse sliding groove (4), a second sliding strip (11) is movably connected in the longitudinal sliding groove (9), one side, far away from the longitudinal displacement plate (8), of the second sliding strip (11) is fixed with the supporting plate (1306), and the second sliding strip (11) slides in the longitudinal sliding groove (9) when the suction component (13) is adjusted.

3. A trace inspection measuring device according to claim 2, wherein: a plurality of first limiting holes (5) are formed in the lateral surface, perpendicular to the bottom plate (1), of the transverse displacement plate (3) at intervals, and a first probing hole is formed in one surface, close to the first limiting hole (5), of the first sliding strip (6); a plurality of second limiting holes (10) are formed in the side face, perpendicular to the bottom plate (1), of the longitudinal displacement plate (8) at intervals, and a second access hole is formed in one face, close to the second limiting holes (10), of the second sliding strip (11); limiting parts (7) are connected between the first limiting hole (5) and the first probing hole and between the second limiting hole (10) and the second probing hole; under the state of connecting the limiting component (7), the positions of the longitudinal displacement plate (8) and the suction component (13) are limited; when the position limiting component (7) is detached, the positions of the longitudinal displacement plate (8) and the suction component (13) are not limited.

4. A trace inspection measuring device according to claim 3, wherein: the limiting part (7) comprises a limiting main body (701) which is used for connecting a first limiting hole (5) and a first access hole or connecting a second limiting hole (10) and a second access hole, a connecting block (702) is arranged on one side of the limiting main body (701), and a deep-in block (703) is arranged on the other side of the connecting block (702); the deep block (703) is respectively embedded in the first limit hole (5), the first probing hole, the second limit hole (10) and the second probing hole.

5. A trace inspection measuring device according to claim 1, wherein: the spring plate (1305) comprises a plate body (1305-1) provided with a groove, a spring (1305-2) is fixed on the bottom surface of the groove, and a movable plate (1305-3) is fixed on the other surface of the spring (1305-2); when the first pulling plate (1301) and the second pulling plate (1303) are in a separated state, the spring (1305-2) extends, and the height of the movable plate (1305-3) is flush with that of the first pulling plate (1301) and the second pulling plate (1303); under the state that the first pulling plate (1301) and the second pulling plate (1303) are folded, the movable plate (1305-3) is located inside the first pulling plate (1301) and the second pulling plate (1303), and the spring (1305-2) is in a compressed state.

6. A trace inspection measuring device according to claim 3, wherein: and a secondary sliding groove (12) is formed in the second sliding strip (11), and the first movable foot (1302) and the second movable foot (1304) are in sliding connection with the secondary sliding groove (12).

7. A trace inspection measuring device according to claim 1, wherein: the fixing part (18) comprises one or more separate bodies; each the components of a whole that can function independently include stock (1801), stock (1801) one end is equipped with fixed orifices (1802), and the other end is equipped with fixed head (1803) in screw in fixed orifices (1802), with the material evidence contact fixed head (1803) outside parcel has contact layer (1804).

8. A trace inspection measuring device according to claim 1, wherein: the microscope is characterized in that a telescopic column (20) is fixed on the second fixing seat (19), a sliding strip (21) is fixed at the other end of the telescopic column (20), and the microscope (23) is connected with the sliding strip (21) through a hinged support (22).

9. A trace inspection measuring device according to any one of claim 1, wherein: the scale bar (1702) is marked with a scale table.

10. A trace inspection measuring device according to any one of claims 1 to 9, wherein: magnets are arranged on one surfaces, close to the accommodating part (14), of the first pulling plate (1301) and the second pulling plate (1303), and the movable plate (1305-3) and the structural support frame (15) are made of the magnets.

Background

In the inspection and identification work of the evidence traces of the forensic science in China, the traces of the evidence such as a bullet shell and the like are compared and identified by mostly adopting a microscope, a digital microscope and auxiliary tools such as a vernier caliper. For a bullet shell, the characteristics of secondary traces remained in the processes of loading, firing and withdrawing the shooting shell need to be collected and measured in the process of manually studying and judging the bullet shell. The inspection and identification of the trace information still remain on the technical level of comparison by means of single direct observation of two-dimensional images, and the problem of accurate positioning and measurement in the three-dimensional space object morphology technology and the trace comparison technology cannot be solved. The current device can not firmly clamp the material evidence, can not randomly adjust the angle of the material evidence during clamping, and can not ensure that a microscope can observe the surface of the material evidence at any angle. In addition, for the material evidence with a large volume, if the clamping force is too large, the surface of the material evidence is easily damaged slightly in the clamping process, and the identification of the trace is influenced. Therefore, a trace inspection measuring device is required to solve the above problems.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to solve the problems of the prior art and provides a trace detection and measurement device.

The technical scheme is as follows: the invention relates to a trace inspection and measurement device, which comprises a bottom plate, wherein a first fixed seat and a second fixed seat are fixed above the bottom plate, one or more microscopes are arranged on one side, far away from the bottom plate, of the second fixed seat, and the trace inspection and measurement device is characterized in that: an attraction part is arranged on one surface, far away from the bottom plate, of the first fixed seat, and an adjusting part for adjusting the position of the attraction part is arranged between the attraction part and the first fixed seat;

the suction component comprises a supporting plate fixed with the adjusting component, a spring plate is fixed on the other side of the supporting plate, a first pulling plate and a second pulling plate are wrapped at two ends of the spring plate, a first movable foot and a second movable foot are respectively arranged on one sides, close to the adjusting component, of the first pulling plate and the second pulling plate, and the first movable foot and the second movable foot are connected with the adjusting component in a sliding mode; when the first pulling plate and the second pulling plate are separated, the spring plate is popped up and the height of the spring plate is flush with that of the first pulling plate and the second pulling plate; the spring plate is wrapped by the first pulling plate and the second pulling plate when the first pulling plate and the second pulling plate are closed;

accommodating parts for fixing the material evidence are adsorbed on one surface of the attraction part, which is far away from the adjusting part, and the number of the accommodating parts is consistent with that of the microscopes; the accommodating part comprises a polyhedral structure supporting frame, and a microscope probe plate for a microscope to probe into is movably adsorbed on one surface of the structure supporting frame; the other surfaces of the structure supporting frame are movably adsorbed with a measuring fixing plate;

the measuring and fixing plate comprises a fixing frame which is adsorbed by the structure supporting frame, a plurality of scale strips are vertically fixed in the fixing frame in a staggered mode, a plurality of threaded holes are formed in each scale strip, and a fixing part which plays a fixing role is rotationally connected in each threaded hole.

The adjusting part is favorable for adjusting the position of the attraction part, so that the position of the accommodating part is adjusted, and observation of the material evidence by the microscope is facilitated. In order to fix the accommodating member, an attracting member is provided, and the accommodating member can be fixed at an arbitrary position. The accommodating part is beneficial to placing and fixing the material evidence, can randomly adjust the angle of the material evidence and clamp the material evidence, and can ensure that the microscope can observe the surface of the material evidence at any angle.

In the attraction part, when the first pulling plate and the second pulling plate are closed, an accommodating part can be attracted above the attraction part. In order to make two material evidences of device contrast observation simultaneously, set up the spring board, increased the surface area of attracting the part, two adsorbable accommodate the part, also be convenient for accomodate the spring board inside first arm-tie and second arm-tie when not using. The first movable foot and the second movable foot are beneficial to sliding the first pulling plate and the second pulling plate.

In the holding part, the structure support frame is as the frame that supports whole holding part, and the polyhedron form is favorable to fixing the material evidence from different directions for the material evidence is that arbitrary angle is placed. In order to facilitate observation of the material evidence in the accommodating part penetrated by the microscope, a microscope penetrating plate is arranged. The measurement fixed plate is favorable for the fixed part to fix the material evidence. The fixed frame is favorable for measuring the fixed plate and adsorbing on the structural support frame. For fixed to holding the material evidence in the part, set up the scale strip, the screw hole is favorable to adjusting the length that fixed part got into in the structural support frame to adjust the extrusion force size of fixed part to the material evidence, be applicable to the material evidence of various shapes, avoid pressure too big and cause small harm to the material evidence surface at the centre gripping in-process, guaranteed the accuracy of material evidence vestige measurement. The plurality of threaded holes facilitate securing the physical document from multiple orientations such that each face, each corner of the physical document can be presented under the microscope.

Preferably, the adjusting component comprises a transverse displacement plate fixed with the first fixed seat, a transverse sliding groove is formed in one surface, away from the first fixed seat, of the transverse displacement plate, a first sliding strip is movably connected in the transverse sliding groove, a longitudinal displacement plate is fixed on one surface, away from the transverse sliding groove, of the first sliding strip, and the first sliding strip slides in the transverse sliding groove when the longitudinal displacement plate is adjusted;

the one side that first draw runner was kept away from to vertical displacement board is equipped with horizontal spout vertically vertical spout, swing joint has the second draw runner in the vertical spout, the one side that vertical displacement board was kept away from to the second draw runner is fixed mutually with the supporting plate, when adjusting and attracting the part the second draw runner slides in vertical spout.

In order to make the longitudinal displacement plate slidable, a transverse sliding groove and a first sliding bar are provided. In order to make the attraction part slidable, a longitudinal slide groove and a second slide bar are provided. The longitudinal displacement plate is adjusted to realize the displacement of the suction component in the transverse direction. By adjusting the suction member itself, displacement of the suction member in the longitudinal direction can be achieved.

Preferably, a plurality of first limiting holes are formed in the side face, perpendicular to the bottom plate, of the transverse displacement plate at intervals, and a first probing hole is formed in one face, close to the first limiting holes, of the first sliding strip; a plurality of second limiting holes are formed in the side face, perpendicular to the bottom plate, of the longitudinal displacement plate at intervals, and a second access hole is formed in one face, close to the second limiting holes, of the second sliding strip; limiting parts are connected between the first limiting hole and the first probing hole and between the second limiting hole and the second probing hole; under the state of connecting the limiting component, the positions of the longitudinal displacement plate and the suction component are limited; when the position limiting component is detached, the position of the longitudinal displacement plate and the position of the suction component are not limited.

In order to limit the positions of the longitudinal displacement plate and the suction part after adjustment, the limiting part is arranged, so that the situation that the position of the suction part moves in the using process and the observation is influenced is avoided.

Preferably, the limiting part comprises a limiting main body for connecting a first limiting hole and a first probing hole or connecting a second limiting hole and a second probing hole, a connecting block is arranged on one side of the limiting main body, and a deep-entering block is arranged on the other side of the connecting block; the deep block is respectively embedded in the first limiting hole, the first probing hole, the second limiting hole and the second probing hole.

The limiting part is simultaneously connected with the first limiting hole and the first probing hole, so that the longitudinal displacement plate is prevented from displacing; and meanwhile, the second limiting hole and the second probing hole are connected, so that the displacement of the suction part is avoided.

Preferably, the spring plate comprises a plate body provided with a groove, the bottom surface of the groove is fixed with a spring, and the other surface of the spring is fixed with a movable plate; when the first pulling plate and the second pulling plate are separated, the spring extends, and the height of the movable plate is flush with that of the first pulling plate and the second pulling plate; under the state that the first pulling plate and the second pulling plate are closed, the movable plate is located inside the first pulling plate and the second pulling plate, and the spring is in a compressed state.

When a plurality of material evidences need to be compared and observed, the first pulling plate and the second pulling plate are separated, the movable plate is ejected out under the action of the spring, and the height of the ejected movable plate is parallel to the first pulling plate and the second pulling plate. Under the condition that only need place a material evidence, down press the fly leaf and fold first arm-tie and second arm-tie can, be favorable to accomodating of fly leaf, it is convenient to use.

Preferably, the second slide bar is provided with a secondary sliding groove, and the first movable foot and the second movable foot are connected with the secondary sliding groove in a sliding manner.

Preferably, the fixing part comprises one or more split bodies; each said components of a whole that can function independently include the stock, stock one end is equipped with the fixed orifices, and the other end is equipped with the fixed head of screw in fixed orifices, with material evidence contact the fixed head outside parcel has the contact layer.

The plurality of split bodies are beneficial to adjusting the length of the fixing part, and the problem that the length exposed outside the measuring fixing plate is too long, so that the positions of the microscope and the plurality of accommodating parts are influenced is avoided. The fixing holes and the fixing heads are beneficial to the connection among the split bodies. The contact layer is in direct contact with the material evidence, and the material evidence can be prevented from being damaged while being fixed.

Preferably, be fixed with flexible post on the second fixing base, the flexible post other end is fixed with the sliding strip, the microscope is connected with the sliding strip through articulated bracket. The telescopic column is favorable for adjusting the height of the microscope, and the hinged support and the sliding strip are favorable for adjusting the distance between the microscope and the accommodating part.

Preferably, the scale bar is marked with a scale table. The scale can assist in telling people the length of the trace while observing with a microscope. The area can also be estimated from the vertically staggered scale bars.

Preferably, the first pulling plate and the second pulling plate are provided with magnets on one surfaces close to the accommodating part, and the movable plate and the structural support frame are made of magnets.

The magnets on the surfaces of the first pulling plate and the second pulling plate are beneficial to adsorbing the accommodating part. The structure carriage material is magnet, is favorable to adsorbing the microscope and visits the board and measure the fixed plate, is favorable to selecting the quantity of installation measurement fixed plate according to the demand.

Has the advantages that: (1) this device is equipped with the part that holds that is used for fixed material evidence, including structure carriage and nimble absorbent microscope visit board and measurement fixed plate, put the material evidence back in the structure carriage, run through the screw hole on the measurement fixed plate with fixed part, through the fixed material evidence of contact layer on the fixed part of equidirectional not. The structure support frame is as supporting the whole frame that holds the part, and the structure support frame of polyhedron form is favorable to fixing the material evidence from different directions for the material evidence is arbitrary angle and places. The quantity can be installed in a flexible way according to the use needs to the measurement fixed plate, is favorable to fixed part to the material evidence fixed, and its inside screw hole is favorable to adjusting the length that fixed part got into in the structural brace frame to adjust the extrusion force size of fixed part to the material evidence, be applicable to the material evidence of various shapes, avoid pressure too big and cause small harm to the material evidence surface at the centre gripping in-process, guaranteed the accuracy of material evidence vestige measurement. The plurality of threaded holes facilitate securing the physical document from multiple orientations such that each face, each corner of the physical document can be presented under the microscope. Utilize the fixed material evidence of holding part, can be with the firm centre gripping of material evidence, the angle of can adjusting the material evidence wantonly in the centre gripping ensures that the microscope can observe the surface of any angle of material evidence.

(2) This device is equipped with and attracts the part, can select the quantity of absorbent holding member according to the user demand, is favorable to measuring device to measure two material evidence contrast. When the first pulling plate and the second pulling plate in the attraction part are closed, an accommodating part can be attracted above the attraction part. When the first pulling plate and the second pulling plate in the suction part are separated, the movable plate on the spring plate rises under the action of the spring, and the height of the movable plate is flush with that of the first pulling plate and the second pulling plate, so that the surface area of the suction part is increased, and two accommodating parts can be sucked. The surface area of the attraction part can be increased or reduced according to the number of material evidences, the use diversity is met, and the space occupied by the attraction part is reduced.

(3) The device is provided with an adjusting component, wherein the adjusting component comprises a transverse displacement plate and a transverse sliding chute, a first sliding strip is movably connected in the transverse sliding chute, a longitudinal displacement plate and a longitudinal sliding chute are also included, and a second sliding strip is movably connected in the longitudinal sliding chute; the transverse displacement of the suction part can be realized by adjusting the longitudinal displacement plate, and the longitudinal displacement of the suction part can be realized by adjusting the suction part. Through the horizontal and longitudinal direction's removal to the suction means, be favorable to adjusting the position of holding the part, be convenient for people to utilize the microscope to observe and measure. The position of the accommodating part is adjusted without using electric energy, so that the energy and the power are saved, and the environment is protected. This device still is equipped with spacing part, and spacing part connects first spacing hole and the first hole of exploring simultaneously, avoids vertical displacement board displacement, connects spacing hole of second and the second hole of exploring simultaneously, avoids attracting the part displacement to reach the purpose of injecing the position of the vertical displacement board after adjusting and attracting the part, avoid attracting the part position in the use and take place to remove, thereby the influence is surveyed.

(4) The fixing part of the device comprises a plurality of split bodies, and the fixing holes and the fixing heads on the split bodies are sequentially in threaded connection, so that the length of the fixing part can be conveniently adjusted, and the problem that the length exposed outside the measuring fixing plate is too long, and the position of a microscope and a plurality of accommodating parts is influenced is avoided. The contact layer on the fixed layer is in direct contact with the material evidence, so that the material evidence can be prevented from being damaged while being fixed.

Drawings

FIG. 1 is a schematic perspective view of a trace inspection and measurement apparatus according to the present invention;

FIG. 2 is a schematic left side view of a trace inspection measuring device according to the present invention;

FIG. 3 is a schematic view of an expanded structure of a suction member of the trace inspection measuring device according to the present invention;

FIG. 4 is a schematic view of a spacing member of the trace inspection and measurement apparatus of the present invention;

FIG. 5 is a schematic view of the structure of a suction member of the trace inspection measuring device according to the present invention;

FIG. 6 is a schematic diagram of a spring plate structure of a trace inspection and measurement apparatus according to the present invention;

FIG. 7 is a schematic view of a containment component of a trace inspection measurement device according to the present invention;

FIG. 8 is a schematic view of a fixing member of the trace inspection measuring device according to the present invention;

reference numbers in the figures: 1. a base plate; 2. a first fixed seat; 3. a lateral displacement plate; 4. a transverse chute; 5. a first limit hole; 6. a first slide bar; 7. a limiting component; 701. a limiting main body; 702. connecting blocks; 703. deeply penetrating into the block; 8. a longitudinal displacement plate; 9. a longitudinal chute; 10. a second limiting hole; 11. a second slide bar; 12. a secondary chute; 13. a suction member; 1301. a first pulling plate; 1302. a first movable foot; 1303. a second pulling plate; 1304. a second movable foot; 1305. a spring plate; 1305-1, a plate body; 1305-2, a spring; 1305-3, a movable plate; 1306. a support plate 14, a housing member; 15. a structural support frame; 16. a microscope probe plate; 17. measuring a fixed plate; 1701. a fixing frame; 1702. a scale bar; 1703. a threaded hole; 18. a fixing member; 1801. a long rod; 1802. a fixing hole; 1803. a fixed head; 1804. a contact layer; 19. a second fixed seat; 20. a telescopic column; 21. a slide bar; 22. a hinged bracket; 23. and (4) a microscope.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Example 1: as shown in fig. 1-8, a trace inspection measuring device, includes bottom plate 1, and 1 top of bottom plate is fixed with first fixing base 2 and second fixing base 19, and the one side that bottom plate 1 was kept away from to second fixing base 19 is equipped with microscope 23 one or more, its characterized in that: an attraction part 13 is arranged on one surface of the first fixed seat 2 far away from the bottom plate 1, and an adjusting part for adjusting the position of the attraction part 13 is arranged between the attraction part 13 and the first fixed seat 2; the adjusting component is used for adjusting the position of the suction component 13, thereby adjusting the position of the accommodating part 14 and facilitating the observation of the material evidence by the microscope 23. The suction member 13 can fix the accommodating member 14 at an arbitrary position. The receiving member 14 is used for placing and holding the physical evidence, and can arbitrarily adjust the angle of the physical evidence and clamp the physical evidence, thereby ensuring that the microscope 23 can observe any angle surface of the physical evidence.

The suction member 13 comprises a supporting plate 1306 fixed with the adjusting member, a spring plate 1305 is fixed on the other surface of the supporting plate 1306, two ends of the spring plate 1305 are wrapped with a first pulling plate 1301 and a second pulling plate 1303, one surfaces, close to the adjusting member, of the first pulling plate 1301 and the second pulling plate 1303 are respectively provided with a first movable foot 1302 and a second movable foot 1304, and the first movable foot 1302 and the second movable foot 1304 are connected with the adjusting member in a sliding manner so as to facilitate sliding of the first pulling plate 1301 and the second pulling plate 1303; when the first pulling plate 1301 and the second pulling plate 1303 are separated, the spring plate 1305 is popped up and is flush with the first pulling plate 1301 and the second pulling plate 1303 in height; when the first pulling plate 1301 and the second pulling plate 1303 are closed, the spring plate 1305 is wrapped by the first pulling plate 1301 and the second pulling plate 1303; when the first pulling plate 1301 and the second pulling plate 1303 are closed, one accommodating member 14 can be attracted. The spring plate 1305 allows the device to see two physical evidence in contrast at the same time, increases the surface area of the attraction part 13, can attract two containing parts 14, and facilitates the spring plate 1305 to be accommodated inside the first pulling plate 1301 and the second pulling plate 1303 when not in use.

The side of the attraction part 13 far away from the adjusting part is adsorbed with accommodating parts 14 for fixing the material evidence, and the number of the accommodating parts 14 is consistent with that of the microscopes 23; the accommodating part 14 comprises a structural support frame 15 in a hexahedron shape, which is used as a frame for supporting the whole accommodating part 14, and the hexahedron shape is convenient for fixing the physical evidence from different directions so that the physical evidence can be placed at any angle; a microscope probe plate 16 for the microscope 23 to probe into is movably adsorbed on one surface of the structure supporting frame 15, so that the microscope 23 can probe into the accommodating part 14 to observe the material evidence conveniently; the other five surfaces of the structure supporting frame 15 are movably adsorbed with a measuring fixing plate 17 which is combined with a fixing part 18 to fix the material evidence;

the measurement fixing plate 17 includes a fixing frame 1701 adsorbed with the structure support frame 15 such that the measurement fixing plate 17 is adsorbed on the structure support frame 15; the fixed frame 1701 is fixed with a plurality of scale bars 1702 in a staggered and vertical mode, each scale bar 1702 is provided with a plurality of threaded holes 1703, and the threaded holes 1703 are internally and rotatably connected with fixing parts 18 for fixing. The length that fixed part 18 got into in the structural support frame 15 is adjusted to screw hole 1703 to adjust the extrusion force size of fixed part 18 to the material evidence, be applicable to the material evidence of various shapes, avoid pressure too big and cause small harm to the material evidence surface at the centre gripping in-process, guaranteed the accuracy of material evidence vestige measurement. The plurality of threaded holes 1703 secure the physical document from multiple directions such that each face, each corner of the physical document can be presented under the microscope 23.

The adjusting component comprises a transverse displacement plate 3 fixed with the first fixed seat 2, a transverse sliding groove 4 is formed in one surface, far away from the first fixed seat 2, of the transverse displacement plate 3, a first sliding strip 6 is movably connected into the transverse sliding groove 4, a longitudinal displacement plate 8 is fixed on one surface, far away from the transverse sliding groove 4, of the first sliding strip 6, and the first sliding strip 6 slides in the transverse sliding groove 4 when the longitudinal displacement plate 8 is adjusted; by adjusting the longitudinal displacement plate 8, the lateral displacement of the suction member 13 can be achieved.

One side of the longitudinal displacement plate 8, which is far away from the first sliding strip 6, is provided with a longitudinal sliding groove 9 which is perpendicular to the transverse sliding groove 4, a second sliding strip 11 is movably connected in the longitudinal sliding groove 9, one side of the second sliding strip 11, which is far away from the longitudinal displacement plate 8, is fixed with the supporting plate 1306, and the second sliding strip 11 slides in the longitudinal sliding groove 9 when the suction part 13 is adjusted. By adjusting the suction member 13 itself, displacement of the suction member 13 in the longitudinal direction can be achieved.

A plurality of first limiting holes 5 are formed in the side face, perpendicular to the bottom plate 1, of the transverse displacement plate 3 at intervals, and a first access hole is formed in one face, close to the first limiting hole 5, of the first sliding strip 6; a plurality of second limiting holes 10 are formed in the side face, perpendicular to the bottom plate 1, of the longitudinal displacement plate 8 at intervals, and a second access hole is formed in one face, close to the second limiting holes 10, of the second sliding strip 11; limiting parts 7 are connected between the first limiting hole 5 and the first access hole and between the second limiting hole 10 and the second access hole; in the state of connecting the limiting component 7, the positions of the longitudinal displacement plate 8 and the suction component 13 are limited; in a state where the stopper member 7 is removed, the positions of the vertical displacement plate 8 and the suction member 13 are released. The limiting component 7 limits the positions of the adjusted longitudinal displacement plate 8 and the suction component 13, and the situation that the position of the suction component 13 moves in the using process so as to influence observation is avoided.

The limiting part 7 comprises a limiting main body 701 for connecting the first limiting hole 5 and the first access hole or connecting the second limiting hole 10 and the second access hole, one side of the limiting main body 701 is provided with a connecting block 702, and the other side of the connecting block 702 is provided with a deep-in block 703; the deep block 703 is fitted in the first stopper hole 5, the first probing hole, the second stopper hole 10, and the second probing hole, respectively. The limiting part 7 is simultaneously connected with the first limiting hole 5 and the first probing hole to avoid the displacement of the longitudinal displacement plate 8; and the second limit hole 10 and the second probing hole are connected at the same time, so that the suction part 13 is prevented from moving.

The spring plate 1305 comprises a plate body 1305-1 provided with a groove, a spring 1305-2 is fixed on the bottom surface of the groove, and a movable plate 1305-3 is fixed on the other surface of the spring 1305-2; when a plurality of physical evidence needs to be contrastingly observed, the first pulling plate 1301 and the second pulling plate 1303 are separated, the movable plate 1305-3 pops up under the action of the spring 1305-2, and the height of the popped movable plate 1305-3 is flush with that of the first pulling plate 1301 and the second pulling plate 1303; only one material evidence is required to be placed, the movable plate 1305-3 is pressed downwards and the first pulling plate 1301 and the second pulling plate 1303 are closed, the movable plate 1305-3 is located inside the first pulling plate 1301 and the second pulling plate 1303, and the spring 1305-2 is in a compressed state.

The second slide bar 11 is provided with a secondary slide groove 12, and the first movable foot 1302 and the second movable foot 1304 are slidably connected with the secondary slide groove 12.

The fixing part 18 comprises three split bodies, and the three split bodies are convenient for adjusting the length of the fixing part 18, so that the problem that the length exposed outside the measuring and fixing plate 17 is too long, and the adjustment of the positions of the microscope 23 and the accommodating parts 14 is influenced is avoided. Each components of a whole that can function independently include stock 1801, and stock 1801 one end is equipped with fixed orifices 1802, and the other end is equipped with the fixed head 1803 in the screw in fixed orifices 1802, and the outside parcel of fixed head 1803 with the material evidence contact has contact layer 1804. The fixing holes 1802 and the fixing heads 1803 are used for connection between the respective division bodies. The contact layer 1804 directly contacts with the physical evidence, so that the physical evidence can be prevented from being damaged while being fixed.

A telescopic column 20 is fixed on the second fixing seat 19, a sliding strip 21 is fixed at the other end of the telescopic column 20, and a microscope 23 is connected with the sliding strip 21 through a hinged support 22. The telescopic column 20 adjusts the height of the microscope 23, and the hinge bracket 22 and the slide bar 21 adjust the distance between the microscope 23 and the accommodating member 14.

The scale bar 1702 is marked with a scale. The scale can assist in telling people the length of the trace while observing with a microscope. From the vertically staggered scale bars 1702, the area can also be estimated.

Magnets are arranged on one surfaces, close to the accommodating part 14, of the first pulling plate 1301 and the second pulling plate 1303, and are used for adsorbing the accommodating part 14; the movable plate 1305-3 and the structural support frame 15 are made of magnets. The material of the structural support frame 15 is magnet, and is used for adsorbing the microscope probe plate 16 and the measurement fixing plate 17, and the quantity of the measurement fixing plate 17 can be selected according to the requirement.

The working principle of the invention is as follows: during the use, if only need observe a material evidence, adsorb on structure braced frame 15 bottom and measure fixed plate 17, put into structure braced frame 15 with the material evidence. Adsorbing a measuring fixing plate 17 on one opposite side of the structural support frame 15, adjusting the position and the angle of the material evidence, respectively rotating a plurality of fixing parts 18 to penetrate through threaded holes 1703 on the measuring fixing plate 17, so that the contact layer 1804 is contacted with the material evidence, and primarily fixing the material evidence; then, adsorbing the measurement fixing plate 17 on the other opposite side surface of the structural support frame 15, continuing to rotate the fixing part 18 to penetrate through the threaded hole 1703, and adjusting the length and the position of the fixing part 18 extending into the threaded hole 1703 so as to adjust the angle and the position of material evidence fixation; after the material evidence is fixed, the split body on the fixing part 18 exposed out of the measuring fixing plate 17 can be rotationally disassembled, so that the phenomenon that the operation of an observer is influenced due to the overlong fixing part 18 is avoided. The accommodating part 14 fixed with the physical evidence is adsorbed above the suction part 13, the position of the microscope 23 is adjusted by adjusting the telescopic column 20, the sliding strip 21 and the hinged support 22, and the microscope 23 is inserted into the accommodating part to observe the physical evidence. If it is necessary to adjust the position of the accommodating member 14, this can also be achieved by adjusting the suction member 13. The longitudinal displacement plate 8 and the first sliding strip 6 are adjusted to slide in the transverse sliding groove 4, so that the transverse displacement of the suction component 13 can be realized. When the suction part 13 is adjusted, the second slide bar 11 slides in the longitudinal slide groove 9, so that the longitudinal displacement of the suction part 13 can be realized. After the adjustment is finished, the limiting part 7 is simultaneously embedded and connected with the first limiting hole 5 and the first probing hole, so that the longitudinal displacement plate 8 is prevented from displacing; and the second limit hole 10 and the second probing hole are connected at the same time, so that the suction part 13 is prevented from moving. If two material evidences need to be observed, the first pulling plate 1301 and the second pulling plate 1303 are separated, the spring plate 1305 is popped out and is flush with the first pulling plate 1301 and the second pulling plate 1303 in height, and two accommodating parts can be placed on the surface of the suction part 13; after use, the movable plate 1305-3 is pressed downwards and the first pulling plate 1301 and the second pulling plate 1303 are closed.

As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.