Reusable biopsy winding device
By designing a reusable biopsy winding device, the problem of limited usage of existing devices is solved, achieving stable and precise winding of the biopsy needle, meeting the needs of high-frequency use, and reducing costs.
Patent Information
- Application Number
- CN202423006144.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing biopsy chord devices have complex structures, suffer from significant wear and tear, and have a limited number of uses, resulting in high operating costs and making it difficult to meet the needs of thousands or tens of thousands of biopsies.
A reusable biopsy winding device was designed, comprising a firing mechanism, a hook mechanism, a winding mechanism, and a winding reset mechanism. The device achieves stable winding of the inner and outer needles through two operations of the handle, ensuring precision and stability.
It enables the biopsy needle to be reused thousands or tens of thousands of times, ensuring the consistency of the movement distance of the inner and outer needles, improving the accuracy of biopsies and reducing the cost of use.
Smart Images
Figure CN223860873U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical and health device technology, and mainly relates to a reusable biopsy strut device. Background Technology
[0002] A biopsy needle is a medical device used for sampling and aspirating cells from pyramidal tumors and unidentified tumors in various organs such as the kidneys, liver, lungs, breasts, thyroid glands, prostate, pancreas, testes, uterus, ovaries, and the body surface. As a diagnostic tool, a biopsy needle generally consists of an inner needle (core) and an outer needle (sheath). It typically requires two firings. Before firing, both the inner and outer needles must be wound separately, i.e., fixed in their firing positions, and then fired sequentially to complete the biopsy procedure.
[0003] Currently available biopsy stringing devices are highly complex, requiring extremely high precision and fit between components. They experience significant wear during use, resulting in a limited number of uses and extremely high operating costs, increasing the financial burden on patients. Therefore, there is an urgent need for a reusable biopsy stringing device that is simple and stable in structure, capable of handling thousands or even tens of thousands of biopsies. Utility Model Content
[0004] To address the aforementioned issues, this invention provides a reusable biopsy strut device with a precise and stable structure, capable of handling thousands or tens of thousands of biopsies.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0006] A reusable biopsy strut device, comprising:
[0007] The firing mechanism includes a horizontally arranged main shaft, on which a slidable front slider and a rear slider are provided, and a front hook pin and a rear hook pin are respectively provided on the front slider and the rear slider.
[0008] The hook mechanism is arranged parallel to the firing mechanism and includes a movable front hook and a rear hook;
[0009] The winding mechanism is located below the hook mechanism and includes a handle. The handle is equipped with a rotating plate and a rotating hook that are linked together. Pulling the handle twice will cause the front hook to hook the front hook pin to complete the first winding through the linkage of the rotating hook and the rotating plate, and then cause the rear hook to hook the rear hook pin to complete the second winding.
[0010] The upper winding reset mechanism includes a reset rod located on the rear side of the handle and a reset torsion spring sleeved on the reset rod, for resetting the handle after it is pulled.
[0011] Furthermore, the firing mechanism also includes a striking block, a front main spring, and a rear main spring. The striking block is rotatably and slidably disposed on the front side of the rear slider, the front main spring is disposed between the front slider and the striking block, and the rear main spring is disposed on the rear side of the rear slider.
[0012] Furthermore, the hook mechanism also includes a front hook spring and a hook limiting block. The front hook spring gives the front hook a rotational force to hook the striking block. The hook limiting block is located on the upper side of the front hook. The front hook includes a front hook cantilever for hooking the striking block and a front hook hook for hooking the front hook pin.
[0013] Furthermore, the upper winding mechanism also includes a rotary tension spring and a rotary compression spring, which are housed in the handle spring groove of the handle. A downward rotary plate hook is provided on the rotary plate, and a rotary hook hook is provided on the rotary hook. One end of the rotary tension spring is connected to the rotary plate hook of the rotary plate, and the other end is connected to the rotary hook hook of the rotary hook. One end of the rotary compression spring is limited in the handle spring groove of the handle, and the other end is limited on the rotary hook hook of the rotary hook.
[0014] Furthermore, the left and right sides of the rear end of the rotating plate are respectively the left limiting surface and the right limiting surface of the rotating plate, which limit the rotation between the left limiting post and the right limiting post of the handle.
[0015] Furthermore, the left side of the rotating plate is provided with a rearward-inclined upward rotating plate sloping top, and the striking block is provided with a striking block platform, a striking block groove, and a striking block inclined surface in sequence; when the first winding is performed, the handle is pulled backward, the front hook of the front hook hooks the front hook pin, the rotating plate sloping top of the rotating plate pushes the striking block inclined surface upward, the front hook cantilever of the front hook slides into the striking block groove, and the hook limiting block is pressed upward by the striking block platform of the striking block, compressing the limiting slider spring of the hook limiting block.
[0016] Furthermore, the right side of the rotating plate is also provided with a rotating plate boss. In the initial state, the rotating plate boss is located directly in front of the rear hook pin. When the first winding occurs, the rotating plate boss rotates to the right synchronously with the rotating plate, thereby misaligning with the rear hook pin. When the second winding occurs, the rotating plate boss pushes the rear hook pin backward until the rear hook catches the rear hook pin.
[0017] Furthermore, the rotating hook is provided with a rotating hook boss, and the rotation of the rotating hook drives the rotating hook boss to push the front hook pin.
[0018] Furthermore, the upper winding mechanism also includes a rotating shaft, which is rotatably disposed in the handle rotating groove. A rotating shaft boss is provided on its top, and the rotating hook and rotating plate rotate around the rotating shaft boss.
[0019] Furthermore, the outer needle holder of the biopsy needle is installed on the front hook pin, and the inner needle holder is installed on the rear hook pin.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] This utility model provides a reusable biopsy winding device with a precise and stable structure, which can meet the needs of thousands or tens of thousands of biopsies. The inner and outer needles of the biopsy needle can be wound by pulling a handle twice, and the movement distance of the two needles is consistent, avoiding the problem of different strokes before and after firing, thereby improving the accuracy of biopsies. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model.
[0023] Figure 2 This is a schematic diagram of the firing mechanism of this utility model. Figure 1 .
[0024] Figure 3 This is a schematic diagram of the firing mechanism of this utility model. Figure 2 .
[0025] Figure 4 This is a schematic diagram of the hook mechanism of this utility model. Figure 1 .
[0026] Figure 5 This is a schematic diagram of the hook mechanism of this utility model. Figure 2 .
[0027] Figure 6 This is a schematic diagram of the upper winding mechanism of this utility model.
[0028] Figure 7 This is an exploded view of the upper chord mechanism of this utility model.
[0029] Figure 8 This is a schematic diagram of the initial state of this utility model (the front slider and the rear slider are omitted).
[0030] Figure 9 This is a schematic diagram of the first winding process of this utility model. Figure 1 (The front and back sliders are omitted.)
[0031] Figure 10 This is a schematic diagram of the first winding process of this utility model. Figure 2 (The front slider, rear slider, front spring, and rear spring are omitted.)
[0032] Figure 11 This is a schematic diagram of the first winding of this utility model (the front slider, rear slider, front spring, and rear spring are omitted).
[0033] Figure 12 This is a schematic diagram of the initial state of the second winding of this utility model (the front slider, rear slider, front spring, and rear spring are omitted).
[0034] Figure 13 This is a schematic diagram of the completion of the second winding of this utility model (the front and rear sliders are omitted).
[0035] in:
[0036] Upper winding mechanism:
[0037] 101. Handle: 101-1. Handle rotation groove; 101-2. Handle left limit post; 101-3. Handle right limit post; 101-4. Handle spring groove; 101-5. Handle rear limit post;
[0038] 102. Rotating plate: 102-1. Rotating plate inclined top; 102-2. Rotating plate hook; 102-3. Rotating plate boss; 102-4. Rotating plate front limiting surface; 102-5. Rotating plate rear limiting surface; 102-6. Rotating plate positioning hole; 102-7. Rotating plate left limiting surface; 102-8. Rotating plate right limiting surface;
[0039] 103. Rotary hook: 103-1. Rotary hook hook; 103-2. Rotary hook boss;
[0040] 104. Rotating shaft: 104-1. Rotating shaft boss;
[0041] 105. Rotary tension spring;
[0042] 106. Rotary compression spring;
[0043] firing mechanism:
[0044] 201. Spindle;
[0045] 202. Rear slider;
[0046] 203. Front slider;
[0047] 204. Rear hook pin: 204-1. Rear hook pin slot;
[0048] 205. Front hook pin: 205-1. Front hook pin slot;
[0049] 206. Impact Block: 206-1. Impact Block Platform; 206-2. Impact Block Groove; 206-3. Impact Block Bevel;
[0050] 207. Rear main spring;
[0051] 208. Front main spring;
[0052] 209. Front stop block;
[0053] Hook mechanism;
[0054] 301. Hook bracket;
[0055] 302. Front hook: 302-1. Front hook cantilever; 302-2. Front hook catch;
[0056] 303. Front hook spring;
[0057] 304 Stainless Steel, Rear Hook: 304-1 Rear Hook Clip
[0058] 305. Hook limit block: 305-1. Limit slider; 305-2. Limit slider base; 305-3. Limit slider spring;
[0059] Upper winding reset mechanism:
[0060] 401. Reset rod;
[0061] 402. Reset torsion spring. Detailed Implementation
[0062] The specific embodiments of this utility model will be further explained below with reference to the accompanying drawings.
[0063] like Figures 1-13 As shown, a reusable biopsy winding device is used to wind the inner and outer needles of a biopsy needle. It is installed in the power unit of the biopsy needle and mainly includes a winding mechanism, a firing mechanism, a hook mechanism, and a winding reset mechanism. The inner and outer needles of the biopsy needle are respectively installed on the firing mechanism. The winding mechanism and the hook mechanism are mainly used to wind and fix the firing mechanism, and the winding reset mechanism is mainly used to reset the winding mechanism.
[0064] For ease of description, Figure 1 For example, the current regulations Figure 1 The right side is front, and the corresponding left side is back. Figure 1 The top side is left, and the corresponding bottom side is right.
[0065] like Figures 2-3 As shown, the firing mechanism is arranged parallel to the upper left side of the upper winding mechanism and includes a main shaft 201, a front slider 203, a rear slider 202, a front hook pin 205, a rear hook pin 204, a striking block 206, a front main spring 208, a rear main spring 207, and a front stop block 209.
[0066] The main shaft 201 is horizontally fixed inside the biopsy power device. A front stop 209 is provided at its front end as a front limit for the front slider 203. The front slider 203 and the rear slider 202 are slidably mounted on the main shaft 201. The striking block 206 is rotatably and slidably mounted on the front side of the rear slider 202. The front main spring 208 is located between the front slider 203 and the striking block 206. The rear main spring 207 is located on the rear side of the rear slider 202. The front hook pin 205 and the rear hook pin 204 are respectively mounted on the front slider 203 and the rear slider 202.
[0067] The outer needle holder of the biopsy needle is mounted on the front hook pin 205, and the inner needle holder is mounted on the rear hook pin 204. The front hook pin 205 and the rear hook pin 204 can move synchronously with the front slider 203 and the rear slider 202, respectively. The front hook pin 205 is provided with a front hook pin groove 205-1, which makes it easy for the front hook hook 302-2 of the front hook 302 to hook the front hook pin 205, thereby achieving the winding of the outer needle of the biopsy needle. The rear hook pin 204 is provided with a rear hook pin groove 204-1, which makes it easy for the rear hook hook 304-1 of the rear hook 304 to hook the rear hook pin 204, thereby achieving the winding of the inner needle of the biopsy needle.
[0068] The striking block 206 is provided with, in sequence, a striking block platform 206-1 that cooperates with the hook limiting block 305 of the hook mechanism, a striking block groove 206-2 that cooperates with the front hook cantilever 302-1 of the front hook 302, and a striking block inclined surface 206-3 that cooperates with the rotating plate inclined top 102-1 of the rotating plate 102. Figure 3 As shown.
[0069] In the initial state, the front main spring 208 and the rear main spring 207 are slightly compressed, thus exerting a small forward thrust on the front slider 203 and the rear slider 202, and consequently exerting a small forward thrust on the front hook pin 205 and the rear hook pin 204.
[0070] like Figures 4-5 As shown, the hook mechanism is located on the upper side of the upper winding mechanism and includes a hook bracket 301, a front hook 302, a front hook spring 303, a rear hook 304, and a hook limiting block 305.
[0071] The hook bracket 301 is a long strip structure and is arranged parallel to the main shaft 201. The front hook 302 and the rear hook 304 are rotatably arranged in the middle and tail sections of the bottom surface of the hook bracket 301, respectively. The front hook 302 is also provided with a front hook spring 303, so that the front hook 302 always has a rotational force to hook the striking block 206 to the left. The front hook 302 is provided with a front hook cantilever 302-1 for cooperating with the striking block 206 and a front hook catch 302-2 for cooperating with the front hook pin 205. The rear hook 304 is provided with a rear hook catch 304-1 for cooperating with the rear hook pin 204.
[0072] The hook limiting block 305 is located on the top surface of the hook bracket 301, corresponding to the front hook 302. The hook limiting block 305 includes a slider base 305-2, a limiting slider spring 305-3, and a limiting slider 305-1. The limiting slider 305-1 is vertically movable within the slider base 305-2. The limiting slider spring 305-3 is engaged between the slider base 305-2 and the limiting slider 305-1, consistently applying a downward force to the limiting slider 305-1. The hook limiting block 305 cooperates with the striking block platform 206-1 of the striking block 206, primarily limiting the rotation of the striking block 206 on the main shaft 201.
[0073] In the initial state, rotational force is generated under the leftward rotational force of the front hook spring 303. The front hook cantilever 302-1 of the front hook 302 hooks the front end face of the striking block 206. The bottom of the limiting slider 305-1 of the hook limiting block 305 is in contact with the hook bracket 301 and the striking block platform 206-1 of the striking block 206. Once the striking block 206 is subjected to a leftward rotational force, the striking block platform 206-1 moves upward, which pushes the limiting slider 305-1 upward and compresses the limiting slider spring 305-3. When the leftward rotational force of the striking block 206 disappears and there is no other obstruction, the limiting slider spring 305-3 rebounds, pushing the striking block 206 back to its initial state. It should be noted that if the front hook cantilever 302-1 is stuck in the striking block groove 206-2, the rotation of the striking block 206 is restricted, preventing it from returning to its initial position.
[0074] like Figures 6-7 As shown, the upper winding mechanism includes a handle 101, a rotating plate 102, a rotating hook 103, a rotating shaft 104, a rotating tension spring 105, and a rotating compression spring 106.
[0075] The handle 101 is located at the bottom of the upper winding mechanism. A handle groove is provided in the middle of its bottom section to facilitate finger insertion and pulling. A handle rotation groove 101-1 is provided on the left side of its front end to accommodate the main body of the rotating shaft 104. A handle spring groove 101-4 is provided on the right side of its front end to accommodate the rotational tension spring 105 and the rotational compression spring 106. A left handle limiting post 101-2 and a right handle limiting post 101-3 are respectively provided on the left and right sides of the rear end of the handle 101, serving as the limit positions for the rear side of the rotating plate 102 when it rotates left and right on the handle. A rear handle limiting post 101-5 is provided at the rear end of the handle 101 to limit the position of the reset rod 401 and one end of the reset torsion spring 402 of the upper winding reset mechanism.
[0076] The rotating shaft 104 is rotatably disposed in the handle rotating groove 101-1, and its top is provided with a rotating shaft boss 104-1 for connecting the rotating hook hole of the rotating hook 103 and the rotating plate positioning hole 102-6 of the rotating plate 102, so that the rotating hook 103 and the rotating plate 102 rotate around the rotating shaft boss 104-1.
[0077] The rotating hook 103 is rotatably mounted on the rotating shaft 104 and also includes a rotating hook hook 103-1 and a rotating hook boss 103-2. The rotating hook hook 103-1 is used to install the rotating tension spring 105 and the rotating compression spring 106. The rotating hook boss 103-2 can pass through the rotating plate 102 and cooperate with the lower end of the front hook pin 205.
[0078] The rotating plate 102 is generally plate-shaped. Its front left side has a rotating plate positioning hole 102-6 for connecting to the top of the rotating shaft 104, serving as the rotating axis of the rotating plate 102. Its front right side has a groove for accommodating and limiting the rotating hook 103's rotating hook boss 103-2. The front and rear sides of the groove are respectively a rotating plate front limiting surface 102-4 and a rotating plate rear limiting surface 102-5 that can fit with the limiting rotating hook 103. Its left side has a rearwardly inclined rotating plate top 102-1 for engaging with the striking block. In conjunction with surface 206-3, there is also a vertically downward rotating plate hook 102-2 on the right side, which is used to connect one end of the rotating tension spring 105. The rear side of the rotating plate hook 102-2 is provided with a rotating plate boss 102-3; the left and right sides of its rear end are respectively the left limiting surface 102-7 and the right limiting surface 102-8 of the rotating plate. The rotating plate 102 rotates around the axis of the rotating shaft boss 104-1, and the two limiting surfaces of the rotating plate are limited to rotate between the left limiting post 101-2 and the right limiting post 101-3 of the handle 101.
[0079] One end of the rotary tension spring 105 is connected to the rotary plate hook 102-2 of the rotary plate 102, and the other end is connected to the rotary hook hook 103-1 of the rotary hook 103. One end of the rotary compression spring 106 is limited in the handle spring groove 101-4 of the handle 101, and the other end is limited on the rotary hook hook 103-1 of the rotary hook 103. The main function of the rotary compression spring 106 is to give the rotary hook hook 103-1 a force that tends towards the rear limiting surface 102-5 of the rotary plate. The main function of the rotary tension spring 105 is to work with the rotary compression spring 106 to achieve elastic linkage between the rotation of the rear side of the rotary plate 102 and the rotation of the rotary hook 103.
[0080] The upper winding reset mechanism is located on the rear side of the upper winding mechanism and includes a reset rod 401 and a reset torsion spring 402. The reset torsion spring 402 is sleeved on the reset rod 401. One end of the reset rod 401 is movably connected to the housing of the biopsy needle's power device, and the other end is movably connected to the rear limit post 101-5 of the handle. When the handle 101 is pulled backward, it compresses the reset torsion spring 402, providing the handle 101 with a forward reset elastic force.
[0081] The working process of the above-mentioned reusable biopsy chord device is as follows:
[0082] Initial state:
[0083] like Figure 8 As shown, under the action of the rotary compression spring 106, the rotary hook boss 103-2 of the rotary hook 103 is located at the rear limiting surface 102-5 of the rotary plate 102 and is close to the lower end of the front hook pin 205. At the same time, the left limiting surface 102-7 of the rotary plate 102 is in contact with the left limiting post 101-2 of the handle 101. At this time, under the action of the left rotation force of the front hook spring 303, the front hook cantilever 302-1 of the front hook 302 hooks the front end face of the striking block 206, the rotary plate boss 102-3 of the rotary plate 102 is located in front of the rear hook pin 204, and the reset torsion spring 402 of the upper winding reset mechanism is in a slightly compressed state.
[0084] First winding:
[0085] Pulling the handle 101 backward causes the rotating hook boss 103-2 to fully engage with the front hook pin 205. Because the backward thrust of the rotating spring 106 on the rotating hook 103 is less than the rebound force of the front main spring 208, the initial rebound force of the front main spring 208 causes the front slider 203 to drive the front hook pin 205 to push the rotating hook boss 103-2 forward. This allows the rotating hook 103-1 of the rotating hook 103 to rotate through the rotating tension spring 105, causing the rotating plate 102 to rotate. At this time, the right limiting surface 102-8 of the rotating plate 102 rotates to the right and engages with the right limiting post 101-3 of the handle. Correspondingly, the rotating plate boss 102-3, which was originally in front of the rear hook pin 204, is misaligned with the bottom of the rear hook pin 204 to prevent them from contacting and engaging. Continue pulling the handle backward. The rebound force of the front main spring 208 further causes the front slider 203 to drive the front hook pin 205 to push the rotating hook boss 103-2 to overcome the resistance of the rotating compression spring 106 and move forward to the rotating plate front limit surface 102-4 of the rotating plate 102. Figure 9 As shown.
[0086] Continue pulling handle 101 backward, as... Figure 10 As shown, at this time, the backward pulling force is greater than the rebound force of the front main spring 208. The handle 101 drives the rotating hook boss 103-2 backward, and the front hook pin 205 moves backward under the push of the rotating hook boss 103-2 until the front hook hook 302 hooks the front hook pin slot 205-1. At the same time, the rotating plate inclined top 102-1 of the rotating plate 102 contacts the striking block inclined surface 206-3 of the striking block 206, and pushes the striking block platform 206-1 of the striking block 206 upward along the inclined surface. That is, the striking block 206 rotates to the left until the front hook cantilever 302-1 of the front hook 302 slides into the striking block groove 206-2 of the striking block 206. Figure 11 As shown, synchronously, the limit slider 305-1 of the hook limit block 305 of the hook mechanism is pushed upward by the striking block platform 206-1 of the striking block 206, and the limit slider spring 305-3 is compressed.
[0087] When handle 101 is released, the return torsion spring 402, compressed by handle 101, rebounds, pushing handle 101 forward back to its initial state. The tail of rotating plate 102 moves to the left, the left limiting surface 102-7 of rotating plate returns to the left limiting post 101-2 of handle, and the boss 102-3 of rotating plate returns to the front of the rear hook pin 204. Figure 12 As shown.
[0088] During the first winding, the front slider 203 drives the outer needle tube seat on the front hook pin 205 to move backward synchronously until it is hooked by the front hook 302 after moving into position, thus completing the winding.
[0089] Second winding:
[0090] Pulling handle 101 backward causes the rotating boss 102-3 to push the rear hook pin 204, located directly behind it, to move backward in a straight line until the rear hook hook 304-1 of the rear hook 304 engages with the rear hook pin groove 204-1 of the rear hook pin 204. Figure 13 As shown. Because the rear hook pin 204 drives the rear slider 202 to move backward, it compresses the rear main spring 207, thereby relieving the forward thrust on the striking block 206. The striking block 206 is only subjected to a small portion of the backward thrust generated by the front main spring 208 and the downward thrust transmitted by the limiting slider spring 305-3 through the limiting slider 305-1. As a result, the striking block 206 slides backward and rotates to the right at the same time. Finally, the front hook cantilever 302-1 of the front hook 302 disengages from the striking block groove 206-2 of the striking block 206 and returns to be in contact with the front end face of the striking block 206.
[0091] Release handle 101, the reset torsion spring 402 returns to its original state, and push handle 101 forward again to return to the initial state.
[0092] During the second winding, the rear slider 202 drives the inner needle tube seat on the rear hook pin 204 to move backward synchronously until it is hooked by the rear hook 304 after moving into position, thus completing the winding.
[0093] The rotating plate 102 rotates under resistance during the first winding and moves straight without resistance during the second winding. After the two windings are completed, the corresponding display blocks on the front slider 203 and the rear slider 202 can be displayed in place through the viewing window of the cover, allowing the operator to observe and confirm from the outside of the device whether the power unit has completed the two winding actions.
[0094] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A reusable biopsy stringing device, characterized in that, include: The firing mechanism includes a horizontally arranged main shaft (201), on which a slidable front slider (203) and a rear slider (202) are arranged, and a front hook pin (205) and a rear hook pin (204) are respectively arranged on the front slider (203) and the rear slider (202); The hook mechanism, which is arranged parallel to the firing mechanism, includes a movable front hook (302) and a rear hook (304). The winding mechanism is located on the lower side of the hook mechanism and includes a handle (101). The handle (101) is equipped with a rotating plate (102) and a rotating hook (103) that are linked together. When the handle (101) is pulled twice, the front hook (302) is driven to hook the front hook pin (205) to complete the first winding through the linkage of the rotating hook (103) and the rotating plate (102), and the rear hook (304) is driven to hook the rear hook pin (204) to complete the second winding. The upper winding reset mechanism includes a reset rod (401) disposed on the rear side of the handle (101) and a reset torsion spring (402) sleeved on the reset rod (401) for resetting after the handle (101) is pulled.
2. The reusable biopsy stringing device according to claim 1, characterized in that, The firing mechanism also includes a striking block (206), a front main spring (208), and a rear main spring (207). The striking block (206) is rotatably and slidably disposed on the front side of the rear slider (202). The front main spring (208) is disposed between the front slider (203) and the striking block (206). The rear main spring (207) is disposed on the rear side of the rear slider (202).
3. The reusable biopsy stringing device according to claim 2, characterized in that, The hook mechanism further includes a front hook spring (303) and a hook limiting block (305). The front hook spring (303) gives the front hook (302) a rotational force to hook the striking block (206). The hook limiting block (305) is located on the upper side of the front hook (302). The front hook (302) includes a front hook cantilever (302-1) for hooking the striking block (206) and a front hook catch (302-2) for hooking the front hook pin (205).
4. The reusable biopsy stringing device according to claim 1, characterized in that, The upper winding mechanism also includes a rotary tension spring (105) and a rotary compression spring (106), which are housed in the handle spring groove (101-4) of the handle (101). A downward-facing rotary plate hook (102-2) is provided on the rotary plate (102), and a rotary hook hook (103-1) is provided on the rotary hook (103). One end of the rotary tension spring (105) is connected to the rotary plate hook (102-2) of the rotary plate (102), and the other end is connected to the rotary hook hook (103-1) of the rotary hook (103). One end of the rotary compression spring (106) is limited in the handle spring groove (101-4) of the handle (101), and the other end is limited on the rotary hook hook (103-1) of the rotary hook (103).
5. A reusable biopsy stringing device according to claim 1, characterized in that, The left and right sides of the rear end of the rotating plate (102) are the left limiting surface (102-7) and the right limiting surface (102-8) of the rotating plate, respectively, which limit the rotation between the left limiting post (101-2) and the right limiting post (101-3) of the handle (101).
6. A reusable biopsy stringing device according to claim 3, characterized in that, The left side of the rotating plate (102) is provided with a rearward-inclined upward rotating plate sloping top (102-1). The striking block (206) is provided with a striking block platform (206-1), a striking block groove (206-2), and a striking block inclined surface (206-3) in sequence. When the first winding is performed, the handle is pulled backward, and the front hook hook (302-2) of the front hook (302) hooks the front hook pin (205). The rotating plate of the rotating plate (102) is inclined. The top (102-1) pushes the inclined surface (206-3) of the striking block to move upward, and the front hook cantilever (302-1) of the front hook (302) slides into the groove (206-2) of the striking block. The hook limiting block (305) is pressed upward by the striking block platform (206-1) of the striking block (206), and the limiting slider (305-1) of the hook limiting block (305) is compressed.
7. The reusable biopsy stringing device according to claim 1, characterized in that, The rotating plate (102) is also provided with a rotating plate boss (102-3) on the right side. In the initial state, the rotating plate boss (102-3) is located in front of the rear hook pin (204). When the first winding is performed, the rotating plate boss (102-3) rotates to the right synchronously with the rotating plate (102), thereby misaligning with the rear hook pin (204). When the second winding is performed, the rotating plate boss (102-3) pushes the rear hook pin (204) backward until the rear hook (304) hooks the rear hook pin (204).
8. A reusable biopsy stringing device according to claim 4, characterized in that, The rotating hook (103) is provided with a rotating hook boss (103-2). The rotation of the rotating hook (103) drives the rotating hook boss (103-2) to push the front hook pin (205).
9. A reusable biopsy stringing device according to claim 1, characterized in that, The upper winding mechanism also includes a rotating shaft (104), which is rotatably disposed in the handle rotating groove (101-1). A rotating shaft boss (104-1) is provided on its top. The rotating hook (103) and the rotating plate (102) rotate around the rotating shaft boss (104-1).
10. A reusable biopsy stringing device according to claim 1, characterized in that, The outer needle tube seat of the biopsy needle is installed on the front hook pin (205), and the inner needle tube seat is installed on the rear hook pin (204).