CN212466240U

CN212466240U - Puncher for animal wound modeling

Info

Publication number: CN212466240U
Application number: CN202020091975.0U
Authority: CN
Inventors: 张江河; 闫燕; 邱奕云; 李翔; 张一鸣
Original assignee: Second Affiliated Hospital Army Medical University
Current assignee: Second Affiliated Hospital Army Medical University
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2021-02-05
Anticipated expiration: 2030-01-16

Abstract

A puncher for modeling animal wound surfaces comprises a fixed lower arm and a movable upper arm, wherein the movable upper arm and the fixed lower arm penetrate through a hinge support and a hinge seat to form hinge connection through a pin shaft, a through hole is formed in the front of the fixed lower arm, a hollow punching knife is installed at the lower end of the front of the fixed lower arm, a strip-shaped hole is formed in the front of the movable upper arm, the through hole and the strip-shaped hole are located between a hinge point and the movable upper arm, the front end of the fixed lower arm penetrates through the hollow punching knife, the through hole and the strip-shaped hole, a cushion block is arranged at the lower end of a lifting rod, a movement distance is reserved between the cushion block and a cutting edge of the hollow punching knife, the length of the strip-shaped hole is larger than the movement distance between the cushion block and the cutting edge, the distance between the tail end of the movable upper arm and the tail end of, the front end of the movable upper arm drives the lifting rod to drive the cushion block to ascend to be matched with the cutting edge of the hollow punching cutter to form punching.

Description

Puncher for animal wound modeling

Technical Field

The utility model relates to a medical science experimental facilities, in particular to hole puncher of animal surface of a wound modeling.

Background

Trauma patients with large-area skin defects are frequently encountered in medical clinical work, the incidence rate of acute wounds is improved along with the increase of traffic accidents, and the treatment research on the acute wounds is gradually deepened. In an animal test of acute wound, an animal wound model is often required to be established as a basis for researching the healing rule and mechanism of skin wound. In order to ensure the accuracy of test results, a large number of animals are required to be modeled at one time in tests, at present, when an animal test wound model is established, a blade, scissors, a trephine or a traditional puncher is usually adopted to cut the skin of the test animal, but the wound surfaces generated by the methods are different in size and lack in consistency, the mixed factors cannot be well eliminated, the test results are easily influenced, and the efficiency of the traditional punching method is low.

Patent document No. 201020142850.2 discloses a skin defect wound surface generation device, which comprises a trephine skin head, a screw rod and a handle, wherein when in use, the trephine skin head is perpendicular to the skin, the handle is rotated along an axis, and the circular edge of the trephine skin head is used for cutting the skin with the same diameter, so that a circular defect wound surface is formed. However, because a wound model is usually established on the back of a test animal, and the subcutaneous part of the back of the animal is relatively soft tissue, the skin of the trephine is difficult to penetrate into the subcutaneous part at one time, usually, only a less obvious impression can be generated on the back of the animal, and then the corresponding skin tissue is cut off by using scissors.

Patent document with application number 201620146164.X discloses a special puncher for animal wound modeling, which comprises two handles, a rotating pivot shaft, two clamp arms, clamp pieces, a punch and a gasket, wherein when the puncher is used, the skin of a test animal needs to be folded and then pinched and lifted, then the puncher is held by hands to enable the jaw end to be occluded at two sides of the skin to be modeled, and the two handles are pinched to enable the punches and the gaskets on the two clamp arms to be occluded, so that two symmetrical skin defect wound surfaces are formed. However, the puncher can only punch holes in a penetrating manner, two wound surfaces must be generated at one time, and some experimental animals, such as mice, have small volume and small available skin area, so that a large-area single wound surface cannot be formed by the puncher; moreover, the bottoms of the two wound surfaces generated by the hole puncher are communicated, and the two wound surfaces are easy to interfere with each other when medicines are applied to the two wound surfaces respectively, so that the test effect is influenced, and the healing process cannot be well reflected. In addition, in actual experiments, wound surfaces with different sizes are often required to be manufactured for different animals, and the tool bit of the two hole punches cannot be replaced. Therefore, in the actual test of the animal wound model, an efficient punching device is urgently needed to meet different test requirements.

Disclosure of Invention

The utility model aims at prior art not enough, provide a hole puncher of animal surface of a wound modeling, its easy operation, extensive applicability can once only produce single complete surface of a wound, improve test efficiency.

The technical scheme of the utility model is that: a puncher for animal wound modeling comprises a fixed lower arm and a movable upper arm, wherein an upwards extending hinged seat is arranged in the middle section of the fixed lower arm, a downwards extending hinged support is arranged in the middle section of the movable upper arm, a pin shaft penetrates through the hinged support and the hinged seat to hinge the movable upper arm and the fixed lower arm to form a hinged fulcrum of the movable upper arm, a through hole penetrating through the front part of the fixed lower arm from top to bottom is formed in the front part of the fixed lower arm, a hollow punching knife is installed at the lower end of the front part of the fixed lower arm to correspond to the through hole, a strip-shaped hole penetrating through the front part of the movable upper arm from top to bottom is formed in the front part of the movable upper arm and the front end of the fixed lower arm, a lifting rod penetrates through the hollow punching knife, the through hole and the strip-shaped hole, a cushion block is arranged at the lower end of the lifting rod, the, the major axis length in bar hole is greater than the cushion apart from the hollow space between the sword cutting edge that punches, the interval distance of activity upper arm, fixed underarm tail end is greater than the major axis length in bar hole, the upper portion of lifter sets up the up end sliding fit of an axial locating part and activity upper arm, set up a return spring between fixed underarm, the activity upper arm, make activity upper arm tail end push down, the front end of activity upper arm drives the cushion through the lifter and rises and the cooperation of hollow sword cutting edge that punches forms.

The movement distance between the cushion block and the cutting edge of the hollow punching knife is 5-7 mm, the length of the strip-shaped hole is 2.5-3.5 times of the movement distance between the cushion block and the cutting edge of the hollow punching knife, the spacing distance between the tail end of the movable upper arm and the tail end of the fixed lower arm is 2.5-3 times of the length of the strip-shaped hole, and the distance between the hinged point and the tail end of the movable upper arm is 2.5-3.5 times of the distance between the hinged point and the front end of the movable upper arm.

The front lower end of the lower fixed arm is provided with a knife sleeve, the knife sleeve is provided with an internal thread, and the hollow punching knife is provided with an external thread and is in threaded connection with the knife sleeve.

The strong rubidium magnet is arranged in the knife sleeve, and the hollow punching knife is sucked in the knife sleeve by the strong rubidium magnet.

The axial locating part comprises two idler wheels, and the two idler wheels are connected through a connecting shaft and are respectively located on two sides of the strip-shaped hole.

The roller adopts a bearing.

The lower end of the movable upper arm is provided with an upper spring seat for fixing the upper end of a return spring, the upper end of the fixed lower arm is provided with a lower spring seat for fixing the lower end of the return spring, and the return spring is located between the hinge point and the tail ends of the movable upper arm and the fixed lower arm.

Two return springs are arranged between the hinge point and the front ends of the movable upper arm and the fixed lower arm, and the two return springs are respectively positioned on two sides of the lifting rod.

The fixed lower arm is characterized in that two sides of the front end of the fixed lower arm are respectively provided with an upwards extending hinged seat, two sides of the front end of the movable upper arm are respectively provided with a downwards extending hinged support, and the width between the two hinged seats is smaller than the width between the two hinged supports.

The front upper end of the fixed lower arm is provided with a guide cylinder, and the guide cylinder and the via hole of the fixed lower arm are on the same axis and communicated with the via hole.

Adopt above-mentioned technical scheme: the hinge pin penetrates through the hinge support and the hinge seat to hinge the movable upper arm and the fixed lower arm, so that the movable upper arm and the fixed lower arm can rotate around the hinge pin by taking the hinge pin as a hinge pivot. The front portion of fixed underarm sets up the via hole, and the hollow sword of punching is installed to the anterior upper end of fixed underarm, and the front portion of activity upper arm sets up the bar hole, via hole, hollow sword, the bar hole three of punching correspond. The lifting rod penetrates through the hollow punching cutter, the via hole and the strip-shaped hole, a cushion block is arranged at the lower end of the lifting rod, and an axial limiting part is arranged at the upper part of the lifting rod and forms sliding fit with the upper end face of the movable upper arm. The length in bar hole is greater than the motion interval between cushion apart from hollow hole puncher sword cutting edge to and the interval distance of activity upper arm, fixed underarm tail end is greater than the major axis length in bar hole, makes activity upper arm and fixed underarm form the lever that uses the pin joint as the fulcrum. When the tail end of the movable upper arm is pressed down, the front end of the movable upper arm can be lifted upwards, the axial limiting part of the lifting rod is in sliding fit with the movable upper arm lifted upwards, the lifting rod drives the cushion block to vertically lift along the strip-shaped hole, the lifting rod lifting through the strip-shaped hole has a yielding effect, and punching is formed along with the rising of the cushion block and the matching of the cutting edge of the hollow punching knife. Because the lifter passes through the hollow punching knife, the lifter can be guided by the hollow punching knife, the lifter is prevented from deflecting in the lifting process, and punching accuracy is guaranteed. And the diameter that sets up the cushion is greater than the diameter of hollow punching sword to can guarantee that the cutting edge of hollow punching sword can support the cushion, and accomplish with the cushion cooperation and punch, accomplish the back of punching, activity upper arm and fixed underarm restore to the original state through return spring between the two. When the punching device is used for building an animal wound model, a linear incision with the length same as the diameter of the cushion block is made at the position where a test animal needs to be punched, the linear incision penetrates through the meat membrane layer, then the cushion block is inserted into the linear incision, the cushion block is rotated to separate tissue layers until the cushion block is completely inserted into the skin, the punching device is adjusted to enable the hollow punching knife to be tightly attached to the animal skin, then the movable upper arm is pressed downwards, the lifting rod drives the cushion block to ascend through the lever principle to be meshed with the cutting edge of the hollow punching knife, so that corresponding skin tissues are cut off, and the building of the animal wound is completed. Therefore, a single complete wound surface can be formed at one time through the punching device, the wound surfaces with the same size and shape can be formed for a plurality of animals, test errors caused by inconsistent sizes of the wound surfaces can be effectively eliminated, and the accuracy of test results is improved. And this perforating device easy operation has greatly improved testing personnel's work efficiency.

The movement distance between the cushion block and the cutting edge of the hollow punching knife is 5-7 mm, the length of the strip-shaped hole is 2.5-3.5 times of the movement distance between the cushion block and the cutting edge of the hollow punching knife, the spacing distance between the tail end of the movable upper arm and the tail end of the fixed lower arm is 2.5-3 times of the length of the strip-shaped hole, and the distance between the hinged point and the tail end of the movable upper arm is 2.5-3.5 times of the distance between the hinged point and the front end of the movable upper arm. The movable upper arm has enough moving distance to ensure that the movable upper arm can drive the cushion block to be occluded with the hollow punching knife by the lever principle to complete punching.

The anterior lower extreme of fixed underarm sets up a knife pouch, the knife pouch sets up the internal thread, the hollow punching sword sets up external screw thread and knife pouch threaded connection, makes hollow punching sword and knife pouch form threaded connection's the dismantlement through setting up the knife pouch and is connected, consequently can change not unidimensional hollow punching sword according to actual need, and the hollow punching sword of convenient to detach disinfects the washing.

The strong rubidium magnet is arranged in the knife sleeve and used for sucking the hollow punching knife in the knife sleeve, and the strong rubidium magnet is used for fixing the hollow punching knife, so that the connection reliability is guaranteed, the hollow punching knife is convenient to install, and the operation is simple and convenient.

The axial locating part includes two gyro wheels, two gyro wheels pass through the connecting axle and connect, are located the both sides in bar hole respectively, adopt the gyro wheel as the axial locating part of lifter, can make the sliding fit that axial locating part and the up end of activity upper arm formed more smooth and easy, guarantee the vertical rise of lifter.

The lower extreme of activity upper arm sets up the spring holder for fixed return spring's upper end, the upper end of fixed underarm sets up down the spring holder for fixed return spring's lower extreme, return spring is located between the tail end of articulated point and activity upper arm, fixed underarm, fixes return spring's both ends respectively in last spring holder, lower spring holder, makes return spring's installation reliable, guarantees return spring and to the return effect of activity upper arm, fixed underarm, and with return spring setting between the tail end of articulated point and activity upper arm, fixed underarm, can avoid return spring to form to the lifter to interfere.

Set up two return springs between activity upper arm, the fixed underarm and be located the hinge point and the front end of activity upper arm, fixed underarm, and two return springs are located the both sides of lifter respectively, avoid return spring to cause the interference to the lift of lifter.

The both sides of fixed underarm front end set up an articulated seat that upwards extends respectively, the both sides of activity upper arm front end set up an articulated support of downwardly extending respectively, and width between two articulated seats is less than the width between two articulated supports, when reserving the activity space for the lifter, further guarantees the articulated reliability of activity upper arm and fixed underarm.

The front upper end of the fixed lower arm is provided with a guide cylinder, the guide cylinder and the via hole of the fixed lower arm are on the same axis and communicated with the via hole, so that the lifting rod can penetrate through the guide cylinder, the lifting rod further plays a role in guiding in the lifting process through the guide cylinder, the lifting rod is prevented from deflecting in the lifting process, and the lifting rod is ensured to be capable of driving the cushion block to vertically lift.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of fig. 1 taken along direction a.

In the attached drawing, 1 is a fixed lower arm, 1-1 is a hinged seat, 1-2 is a through hole, 1-3 is a lower spring seat, 1-4 is a guide cylinder, 2 is a movable upper arm, 2-1 is a hinged support, 2-2 is a strip-shaped hole, 2-3 is an upper spring seat, 3 is a pin shaft, 4 is a hollow punching cutter, 5 is a lifting rod, 6 is a cushion block, 7 is an axial limiting part, 7-1 is a roller, 8 is a return spring, 9 is a cutter sleeve, and 10 is a strong rubidium magnet.

Detailed Description

Referring to fig. 1 to 2, a puncher for animal wound modeling comprises a fixed lower arm 1 and a movable upper arm 2. The middle section of the fixed lower arm 1 is provided with an upwards extending hinge seat 1-1, the middle section of the movable upper arm 2 is provided with a downwards extending hinge support 2-1, and a pin shaft 3 passes through the hinge support 2-1 and the hinge seat 1-1 to hinge the movable upper arm 2 and the fixed lower arm 1 to form a hinge fulcrum of the movable upper arm 2, so that the movable upper arm 2 forms a lever taking the hinge fulcrum as a fulcrum and can rotate around the pin shaft 3. This embodiment sets up an articulated seat 1-1 of upwards extending respectively in the both sides of fixed underarm 1 front end, the both sides of 2 front ends on the activity upper arm set up an articulated support 2-1 of downwardly extending respectively, and the width between two articulated seats 1-1 is less than the width between two articulated supports 2-1, when reserving the space of stepping down for installation lifter 5, further guarantees the articulated reliability of activity upper arm 2 and fixed underarm 1, makes this perforating device's structure more stable. The punching device is characterized in that a through hole 1-2 which penetrates through the upper part and the lower part is formed in the front part of the fixed lower arm 1, a hollow punching knife 4 is installed at the lower end of the front part of the fixed lower arm 1 and corresponds to the through hole 1-2, a knife sleeve 9 is arranged at the lower end of the front part of the fixed lower arm 1, an internal thread is arranged on the knife sleeve 9, the hollow punching knife 4 is in threaded connection with the knife sleeve 9 through an external thread, the hollow punching knife 4 and the knife sleeve 9 are detachably connected through the knife sleeve 9, therefore, in the actual use, the hollow punching knives 4 with different sizes can be replaced according to the actual requirement, the replacement is convenient, the punching device can be suitable for different test animals, the application range is enlarged, a strong rubidium magnet 10 can also be installed in the knife sleeve 9, the strong rubidium magnet 10 absorbs the hollow punching knife 4 in the knife sleeve 9, and the knife sleeve 9 and the hollow punching knife 4 are detachably connected, guarantee that the installation of hollow punching sword 4 is reliable on the one hand, on the other hand testing personnel are when installing hollow punching sword 4, only need the upper end of handheld hollow punching sword 4 to aim at knife pouch 9 and can tightly be adsorbed by strong rubidium magnet 10 and live, the installation is simple fast, prevent that testing personnel from being injured because of contacting the cutting edge at the in-process of installing hollow punching sword 4, and in addition, hollow punching sword 4 adopts the detachable connected mode, be convenient for wash the residue after the perforating device uses, and be convenient for disinfect. The front part of the movable upper arm 2 is provided with a strip-shaped hole 2-2 which penetrates through the upper part and the lower part, the through hole 1-2 and the strip-shaped hole 2-2 are both positioned between the hinge point and the front ends of the movable upper arm 2 and the fixed lower arm 1, and the lifting rod 5 penetrates through the hollow punching knife 4, the knife sleeve 9, the through hole 1-2 and the strip-shaped hole 2-2. The lower extreme of lifter 5 sets up a cushion 6, the diameter of cushion 6 is greater than hollow punching sword 4 diameter, guarantees that hollow punching sword 4 can support cushion 6. The upper portion of lifter 5 sets up the up end sliding fit of an axial locating part 7 and activity upper arm 2, axial locating part 7 includes two gyro wheels 7-1, two gyro wheels 7-1 pass through the connecting axle and connect, are located the both sides of bar hole 2-2 respectively, and it is spacing to adopt gyro wheel 7-1 as the axial of lifter 5, can make its sliding fit with activity upper arm 2 more smooth and easy, guarantees the vertical rising of lifter 5 in the use, gyro wheel 7-1 can adopt the bearing, reduces the friction between gyro wheel 7-1 and the connecting axle, prolongs the life of axial locating part 7, guarantees sliding fit's reliability. A movement interval is reserved between the cushion block 6 and the cutting edge of the hollow punching cutter 4, a certain rising space is guaranteed to be reserved on the cushion block 6, the length of the long axis of each strip-shaped hole 2-2 is larger than the movement interval between the cushion block 6 and the cutting edge of the hollow punching cutter 4, the spacing distance between the tail end of each movable upper arm 2 and the tail end of each fixed lower arm 1 is larger than the length of the long axis of each strip-shaped hole 2-2, the movable upper arms 2 are enabled to have enough moving distance, and therefore the movable upper arms 2 are guaranteed to be capable of driving the cushion. A return spring 8 is arranged between the fixed lower arm 1 and the movable upper arm 2. The tail end of the movable upper arm 2 is pressed downwards, the front end of the movable upper arm 2 drives the cushion block 6 to ascend through the lifting rod 5 to be matched with the cutting edge of the hollow punching cutter 4 to form punching, and after punching is completed, the movable upper arm 2 and the fixed lower arm 1 are restored to the original positions through the pulling force of the return spring 8.

In the embodiment, the lower end of the movable upper arm 2 is provided with the upper spring seats 2-3 for fixing the upper end of the return spring 8, the upper end of the fixed lower arm 1 is provided with the lower spring seats 1-3 for fixing the lower end of the return spring 8, and the return spring 8 is positioned between the hinge point and the tail ends of the movable upper arm 2 and the fixed lower arm 1, so that the return spring 8 is prevented from interfering with the movement of the lifting rod 5.

The utility model discloses a further embodiment can also set up between activity upper arm 2, fixed underarm 1 that two return spring 8 are located the hinge point and between the front end of activity upper arm 2, fixed underarm 1, and two return spring 8 are located the both sides of lifter 5 respectively, when guaranteeing return spring 8 and act on the return of activity upper arm 2 and fixed underarm 1, also can not form the interference to the elevating movement of lifter 5.

The utility model discloses in movement interval between the cutting edge of cushion 6 and hollow punching sword 4 is 5~7mm, 2-2 times of length in bar hole is 2.5~3.5 times of movement interval between cushion 6 and hollow punching sword 4 cutting edge, the spacing distance of activity upper arm 2, fixed underarm 1 tail end is 2.5~3 times of bar hole 2-2 length, and the distance between 2 tail ends of articulated point and activity upper arm is 2.5~3.5 times of the distance between 2 front ends of articulated point and activity upper arm, makes activity upper arm 2 have sufficient displacement to guarantee that activity upper arm 2 can drive cushion 6 and hollow punching sword 4 interlocks through lever principle, accomplish and punch.

When the punching device is used for building an animal wound model, firstly, a linear incision with the same length as the diameter of the cushion block 6 is made at the position where a test animal needs to punch, the depth of the linear incision penetrates through a meat membrane layer, then the cushion block 6 is inserted into the linear incision, the cushion block 6 is rotated to separate tissue layers of the skin of the test animal until the cushion block 6 is completely inserted into the skin, then the punching device is adjusted, because the distance between the cushion block 6 and the blade of the hollow punching knife 4 is usually only 5-7 mm, after the cushion block 6 is inserted into the skin of the animal, the blade of the hollow punching knife 4 can be basically attached to the skin of the animal, then the tail end of the movable upper arm 2 is pressed downwards, the front end of the movable upper arm 2 is lifted upwards through the lever principle, at the moment, the axial limiting part 7 of the lifting rod 5 is in sliding fit with the movable upper arm 2 lifted upwards, and the lifting rod 5 has the, so that the lifting rod 5 drives the cushion block 6 to do ascending motion along the strip-shaped hole 2-2. As the upper end of the front part of the fixed lower arm 1 is provided with the guide cylinder 1-4, the guide cylinder 1-4 and the through hole 1-2 of the fixed lower arm 1 are on the same axial line, and is communicated with the through hole 1-2, the lifting rod 5 sequentially passes through the hollow punching knife 4, the knife sleeve 9, the through hole 1-2, the guide cylinder 1-4 and the strip-shaped hole 2-2, therefore, when the lifting rod 5 moves upwards, the hollow punching knife 4, the knife sleeve 9 and the guide cylinders 1 to 4 can guide the lifting rod 5, the lifting rod 5 is prevented from deflecting in the lifting process, the lifting rod 5 drives the cushion block 6 to move vertically upwards until the cushion block 6 rises to abut against the cutting edge of the hollow punching knife 4 and is occluded with the cutting edge of the hollow punching knife 4, so as to cut off corresponding skin tissues, complete the punching on the skin of the test animal and establish an animal wound model. After the punching is finished, the cushion block 6 can be separated from the hollow punching cutter 4 only by releasing the force applied to the movable upper arm 2 and enabling the movable upper arm 2 to recover the original position under the pulling force of the return spring 8, then the hollow punching cutter 4 is taken down from the cutter sleeve 9, the residues are cleaned, and the punching device is cleaned for the next use.

The punching device can form a single complete wound at one time, can form the wound with the same size and shape for a plurality of test animals, can effectively eliminate test errors caused by inconsistent sizes of the wound, improves the accuracy of test results, reduces the pain of the test animals, and can keep vertical rising under the guiding effect of the guide cylinders 1-4 by the lifting rod 5 in the punching process, thereby ensuring the accuracy of the punching shape. The hollow punching knife 4 in the punching device can be flexibly detached, is very convenient to replace, meets the sterile requirement in the test, can design the hollow punching knives 4 with different diameters, and can select the hollow punching knife 4 with the proper diameter aiming at different test animals, so that the application range is wider. Moreover, the punching device is simple to operate, and the working efficiency of testers can be greatly improved.

Claims

1. A hole puncher for animal wound modeling is characterized in that: the movable upper arm comprises a fixed lower arm (1) and a movable upper arm (2), wherein an upwards extending hinged seat (1-1) is arranged in the middle section of the fixed lower arm (1), a downwards extending hinged support (2-1) is arranged in the middle section of the movable upper arm (2), a pin shaft (3) penetrates through the hinged support (2-1) and the hinged seat (1-1) to hinge the movable upper arm (2) and the fixed lower arm (1) to form a hinged fulcrum of the movable upper arm (2), a through hole (1-2) penetrating up and down is formed in the front part of the fixed lower arm (1), a hollow punching cutter (4) is installed at the lower end of the front part of the fixed lower arm (1) and corresponds to the through hole (1-2), a strip-shaped hole (2-2) penetrating up and down is formed in the front part of the movable upper arm (2), and the through hole (1-2) and the strip-shaped hole (2) are located at the, Between the front end of fixed underarm (1), a lifter (5) passes from hollow punching cutter (4), via hole (1-2), bar hole (2-2), the lower extreme of lifter (5) sets up a cushion (6), the diameter of cushion (6) is greater than hollow punching cutter (4) diameter, leave the movement interval between the cutting edge of cushion (6) and hollow punching cutter (4), the major axis length of bar hole (2-2) is greater than cushion (6) and moves interval between hollow punching cutter (4) cutting edge, the interval distance of activity upper arm (2), fixed underarm (1) tail end is greater than the major axis length of bar hole (2-2), the upper portion of lifter (5) sets up an axial locating part (7) and the up end sliding fit of activity upper arm (2), fixed underarm (1), A return spring (8) is arranged between the movable upper arms (2) to press down the tail ends of the movable upper arms (2), and the front ends of the movable upper arms (2) drive the cushion blocks (6) to ascend through the lifting rods (5) to be matched with the cutting edges of the hollow punching cutters (4) to form punching.

2. The punch for animal wound modeling according to claim 1, wherein: the movement interval between the cushion block (6) and the cutting edge of the hollow punching cutter (4) is 5-7 mm, the length of the strip-shaped hole (2-2) is 2.5-3.5 times of the movement interval between the cushion block (6) and the cutting edge of the hollow punching cutter (4), the spacing distance between the tail end of the movable upper arm (2) and the tail end of the fixed lower arm (1) is 2.5-3 times of the length of the strip-shaped hole (2-2), and the distance between the hinged point and the tail end of the movable upper arm (2) is 2.5-3.5 times of the distance between the hinged point and the front end of the movable upper arm (2).

3. The punch for animal wound modeling according to claim 1, wherein: the front lower end of the fixed lower arm (1) is provided with a knife sleeve (9), the knife sleeve (9) is provided with an internal thread, and the hollow punching knife (4) is provided with an external thread and a knife sleeve (9) which are in threaded connection.

4. The punch for animal wound modeling according to claim 3, wherein: the punching knife is characterized in that a strong rubidium magnet (10) is arranged in the knife sleeve (9), and the hollow punching knife (4) is absorbed in the knife sleeve (9) by the strong rubidium magnet (10).

5. The punch for animal wound modeling according to claim 1, wherein: the axial limiting part (7) comprises two idler wheels, the two idler wheels are connected through a connecting shaft and are respectively located on two sides of the strip-shaped hole (2-2).

6. The punch for animal wound modeling according to claim 5, wherein: the roller adopts a bearing.

7. The punch for animal wound modeling according to claim 1, wherein: the lower end of the movable upper arm (2) is provided with an upper spring seat (2-3) for fixing the upper end of a return spring (8), the upper end of the fixed lower arm (1) is provided with a lower spring seat (1-3) for fixing the lower end of the return spring (8), and the return spring (8) is located between the hinge point and the tail ends of the movable upper arm (2) and the fixed lower arm (1).

8. The punch for animal wound modeling according to claim 1, wherein: two return springs (8) are arranged between the movable upper arm (2) and the fixed lower arm (1) and located between the hinge point and the front ends of the movable upper arm (2) and the fixed lower arm (1), and the two return springs (8) are located on two sides of the lifting rod (5) respectively.

9. The punch for animal wound modeling according to claim 1, wherein: two sides of the front end of the fixed lower arm (1) are respectively provided with an upwards extending hinged support (1-1), two sides of the front end of the movable upper arm (2) are respectively provided with a downwards extending hinged support (2-1), and the width between the two hinged supports (1-1) is smaller than the width between the two hinged supports (2-1).

10. The punch for animal wound modeling according to claim 1, wherein: the upper end of the front part of the fixed lower arm (1) is provided with a guide cylinder (1-4), and the guide cylinder (1-4) and the through hole (1-2) of the fixed lower arm (1) are on the same axis and communicated with the through hole (1-2).