Repeated loading fixture

Abstract

The invention relates to a repeated loading fixing device, and belongs to the technical field of medical instruments, and the repeated loading fixing device comprises a handle with a near end and a far end; the sleeve is arranged at the far end of the handle; the implant is arranged in the cannula; the percussion assembly comprises a percussion rod and a pushing rod, the percussion rod and the pushing rod extend into the sleeve from the handle, the pushing rod pushes an implant towards the far end, and the percussion rod is used for percussion of the implant located at the farthest end; the driving assembly drives the pushing rod to move towards the far end and limits the pushing rod to move towards the near end of the handle, and the unlocking mechanism relieves limitation so that the pushing rod can move towards the near end of the handle. According to the application, the limitation of the driving assembly on the movement of the pushing rod towards the near end can be removed through the unlocking mechanism, and then the pushing rod is allowed to move towards the near end of the handle, so that an operator can load an implant into the sleeve again.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a repeated loading fixing device. Background Art

[0002] Biological patches are widely used in surgical operations, especially in tendons, ligaments and other connective tissues that connect bones and muscles. With the advancement of medical technology, biological patches can not only provide immediate structural support, but also promote tissue regeneration in the body, thereby accelerating the healing process. For broken or severely damaged soft tissues, biological patches provide an effective alternative. By fixing the patch to the damaged part, the strength of the local tissue can be enhanced and favorable conditions for the growth of new tissue can be created. However, in order to ensure that the biological patch can be stably attached to the soft tissue to be repaired, a specially designed fixation device must be used to achieve this. Traditional fixation methods usually rely on tools such as sutures or metal nails, but these methods may cause additional trauma and, in some cases, it is difficult to ensure long-term stability. In contrast, modern fixation devices use more advanced design concepts. They can directly penetrate the biological patch and tightly integrate with the soft tissue to form a stable point by stimulating the injection of fixed implants. Therefore, in actual clinical applications, doctors face the dual challenges of pursuing both efficiency and safety.

[0003] Biological patches generally require six or more fixation implants to be fixed on the soft tissue to be repaired. Therefore, the operator often needs to repeatedly load the fixation implants and tendon fixation devices into and out of the human body during one repair operation, making the operation complicated and time-consuming.

[0004] To this end, the related art has developed a fixation device that can continuously excite the fixation implant. For example, the patent publication US9498211B2 discloses an applicator for deploying surgical fasteners. It can continuously excite the fasteners multiple times during one operation to fix the biological patch and the tendon to be repaired. However, it is impossible to reload the fasteners into the applicator. If the patient needs to fix the implant beyond the installed part of the fixation device, multiple instruments need to be used. Summary of the invention

[0005] Based on this, it is necessary to provide a reloadable fixation device to address the problem that the tendon fixation device cannot reload the fixation implant.

[0006] In order to solve the above technical problems, the present application adopts the following technical solution: a repeated loading and fixing device, comprising:

[0007] a handle having a proximal end and a distal end;

[0008] a sleeve, disposed at the distal end of the handle;

[0009] An implant is disposed in the sleeve;

[0010] A firing assembly, comprising a firing rod and a pushing rod, wherein the firing rod and the pushing rod extend from the handle into the sleeve, the pushing rod pushes the implant toward the distal end, and the firing rod fires the implant located at the most distal end;

[0011] a driving assembly, driving the push rod to move toward the distal end and limiting the push rod to move toward the proximal end of the handle, and

[0012] The unlocking mechanism releases the restriction to enable the push rod to move toward the proximal end of the handle.

[0013] The application of the present invention has the following beneficial effects: by setting a driving assembly, the push rod can be driven to move distally in a single direction, so that in the successive firing operations, the push rod can be driven to move distally one by one to push the implants one by one to the distal end of the sleeve, and the implant located at the farthest end can be fired out by the firing rod. The unlocking mechanism can release the restriction of the driving assembly on the push rod to move proximally, so that after all the implants set in the sleeve are fired out, the restriction can be released by the unlocking mechanism to allow the push rod to move to the proximal end of the handle. Thus, the push rod can eliminate the occupation of the internal space of the sleeve during the firing process by shifting proximally, and the operator can load the implant into the sleeve again.

[0014] In one embodiment, the driving assembly includes a driving member capable of reciprocating between the proximal end and the distal end of the handle, the driving member is provided with an elastic arm, and at least one guide portion is provided along the length direction of the push rod; when the elastic arm moves toward the distal end with the driving member, the elastic arm abuts against the guide portion to drive the push rod to move toward the distal end, and when the elastic arm moves toward the proximal end with the driving member, it avoids the guide portion by relative movement with the driving member. Through the cooperation of the elastic arm on the driving member and the guide portion on the push rod, the driving member can drive the push rod to move toward the distal end during the process of moving toward the distal end, and the driving member can avoid the guide portion during the process of moving toward the proximal end to avoid driving the push rod to move toward the proximal end.

[0015] In one embodiment, the elastic arm is specifically a first slider, the first slider can be elastically deformed, and the guide portion is a first guide groove engaged with the first slider. By arranging the first slider and the first guide groove as the elastic arm and the guide portion respectively, the required function can be achieved, and manufacturing and assembly are facilitated.

[0016] In one embodiment, the drive assembly further comprises a locking member, and at least one abutment portion is provided along the length direction of the push rod; the locking member abuts against the abutment portion to limit the push rod from moving toward the proximal end, and the locking member avoids the abutment portion by relative movement of the handle when the push rod moves toward the distal end of the sleeve. By cooperating with the abutment portion on the push rod, the locking member can limit the push rod from moving toward the proximal end, and at the same time, the locking member can avoid the abutment portion during the process of the push rod moving toward the distal end to avoid hindering the push rod from moving toward the distal end.

[0017] In one embodiment, the locking member is specifically a second slider capable of elastic deformation, and the abutment portion is a second guide groove engaged with the second slider. By arranging the second slider and the second guide groove as the locking member and the abutment portion respectively, the required function can be achieved, and manufacturing and assembly are facilitated.

[0018] In one embodiment, the unlocking mechanism includes a pusher provided with a handle, the pusher abuts against the drive assembly and is used to push the drive assembly to separate from the push rod to release the restriction. The drive assembly can be pushed to separate from the push rod by providing the pusher so that the push rod can move toward the proximal end.

[0019] In one embodiment, the handle includes a housing and a cover plate detachably mounted on the housing, wherein the cover plate can be switched between an initial position and a pushing position relative to the housing in a detached state; the pusher is disposed between the driving assembly and the cover plate, and the pusher is driven by the cover plate during the movement of the cover plate from the initial position to the pushing position to push the driving assembly to separate from the pushing rod. By providing a cover plate detachable from the housing, it is convenient for the operator to operate from the outside of the handle, and by pushing the cover plate, the pusher can be driven to push the driving assembly to separate from the pushing rod.

[0020] In one embodiment, the firing assembly further comprises a toggle rod extending from the handle into the sleeve, the proximal end of the toggle rod is connected to the drive assembly, and a paddle is provided at the distal end of the toggle rod, the paddle is inclined toward the distal end, and the paddle is used to guide the implant at the distal end to fall into the distal end of the sleeve during the firing process. By providing the toggle rod, the implant can be guided to fall into the farthest end of the sleeve through the paddle on the toggle rod, which can improve the accuracy of the implant switching position to the farthest end of the sleeve and avoid the occurrence of jamming during the firing process.

[0021] In one embodiment, the toggle rod and the firing rod are spaced apart, the implant is disposed between the toggle rod and the firing rod, and the distal end of the push rod extends between the toggle rod and the firing rod and abuts against the implant. By setting the relative positions of the toggle rod and the firing rod, the assembly operation of the firing assembly and the drive assembly can be facilitated.

[0022] In one embodiment, the sleeve includes a tube body and an end cap, the end cap is detachably connected to the distal end of the tube body, and the distal end of the tube body is formed with a loading hole for loading the implant into the tube body. With the above structural design, when the implant needs to be loaded, the end cap can be removed from the tube body to perform the assembly operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a repeated loading fixture provided in an embodiment of the present application;

[0024] Figure 2 Explosion of fixtures for repeated loading Figure 1 ;

[0025] Figure 3 It is a schematic diagram of the connection between the connection block and the firing assembly;

[0026] Figure 4 It is a transverse cross-sectional view of the connecting block, the connecting frame, the pushing rod and the pushing bracket;

[0027] Figure 5 Explosion of fixtures for repeated loading Figure 2 ;

[0028] Figure 6 is a cross-sectional view of the sleeve, the firing rod, the toggle rod and the implant after the implant is loaded;

[0029] Figure 7 is a cross-sectional view of the cannula, firing rod, toggle rod and implant during the first firing operation;

[0030] Figure 8 is a cross-sectional view of the cannula, the firing rod, the toggle rod and the implant after the firing operation;

[0031] Fig. 9 A cross-sectional view of the sleeve, the firing rod, the toggle rod and the implant during a firing operation when the implant is disposed at the distal end of the firing sleeve;

[0032] Fig.10 Explosion of fixtures for repeated loading Figure 3 .

[0033] Reference numerals: 1, handle; 10, housing; 100, first half shell; 101, second half shell; 103, opening; 105, block; 11, cover plate; 110, first locking screw; 111, observation window; 112, first elastic member; 12, screw sleeve; 2, sleeve; 20, tube body; 200, loading hole; 202, slot; 21, end; 212, implant observation hole; 213, second locking screw; 3, firing assembly; 30, firing rod; 31, push rod; 310, first guide groove; 311, second guide groove; 32, toggle rod; 320, paddle; 321, spring; 4, driving assembly; 40, driving member; 400, first slider; 401, first pin; 41, connecting block; 410, second slider; 411, first limit slide; 412, second limit slide; 413, rotating shaft; 5, pushing member; 50, first pushing part; 51, second pushing part; 6, driving mechanism; 60, gear; 61, rack; 610, second pin; 62, connecting member; 620, first opening; 621, second opening; 63, operating handle; 630, second elastic member; 7, implant. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, the "proximal end" refers to the end of the reload fixture that is relatively close to the operator when in use, and the "distal end" refers to the end of the reload fixture that is relatively far away from the operator when in use.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0040] This embodiment provides a repeated loading fixture, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown in , the repeated loading fixation device comprises a handle 1, a sleeve 2, an implant 7, a firing assembly 3, a drive assembly 4 and an unlocking mechanism. The handle 1 has a proximal end and a distal end. Figure 1As shown in , arrow S points to the proximal direction, and arrow P points to the distal direction. The sleeve 2 is arranged at the distal end of the handle 1, and the implant 7 is arranged in the sleeve 2. The implant 7 described in this embodiment can be used to fix the biological patch to the soft tissue. The firing assembly 3 includes a firing rod 30 and a push rod 31, and the firing rod 30 and the push rod 31 extend from the handle 1 to the sleeve 2. The push rod 31 pushes the implant 7 toward the distal end, and the firing rod 30 fires the implant 7. The driving assembly 4 drives the push rod 31 to move toward the distal end and restricts the push rod 31 from moving toward the proximal end of the handle 1. The unlocking mechanism releases the restriction to enable the push rod 31 to move toward the proximal end of the handle 1.

[0041] The repeated loading fixture provided in this embodiment can drive the push rod 31 to move distally in a single direction by setting a driving assembly 4, so that in the successive firing operation, the push rod 31 can be driven to move distally one by one to push the implants 7 one by one to the distal end of the sleeve 2, and the implants 7 located at the distal end of the sleeve 2 are fired and discharged by the firing rod 30. The unlocking mechanism can release the restriction of the driving assembly 4 on the proximal movement of the push rod 31, so that after all the implants 7 set in the sleeve 2 are fired and discharged, the restriction can be released by the unlocking mechanism to allow the push rod 31 to move toward the proximal end of the handle 1. Therefore, the push rod 31 can eliminate the occupation of the internal space of the sleeve 2 during the firing process by moving proximally, and the operator can load the implant 7 into the sleeve 2 again.

[0042] Combination Figure 3 and Figure 4 As shown in , the drive assembly 4 includes a drive member 40 that can reciprocate between the proximal end and the distal end of the handle 1. The drive member 40 is provided with an elastic arm, and the push rod 31 is provided with a plurality of guide portions spaced apart along its length direction. When the elastic arm moves toward the distal end with the drive member 40, the elastic arm abuts against the guide portion to drive the push rod 31 to move toward the distal end, and when the elastic arm moves toward the proximal end with the drive member 40, it avoids the guide portion by moving relative to the drive member 40. By matching the elastic arm on the drive member 40 with the guide portion on the push rod 31, the drive member 40 can drive the push rod 31 to move toward the distal end during the process of moving toward the distal end, and the drive member 40 can avoid the first guide portion during the process of moving toward the proximal end to avoid driving the push rod 31 to move toward the proximal end. It is easy to understand that in other optional embodiments, the number of guide portions can also be set to one.

[0043] Specifically in this embodiment, the elastic arm is specifically the first slider 400, the first slider 400 can be elastically deformed, and the guide part is the first guide groove 310 meshing with the first slider 400. By setting the first slider 400 and the first guide groove 310 as the elastic arm and the guide part respectively, the required function can be achieved, and it is convenient for manufacturing and assembly. The meshing match described here means that the opening direction of the first guide groove 310 is toward the proximal direction, and the first guide groove 310 has a pressure surface facing the proximal end and a guide inclined surface inclined relative to the pressure surface. After the first slider 400 is inserted into the first guide groove 310, the side surface of the end of the first slider 400 facing the distal end is in contact with the pressure surface, and at the same time, the side surface of the end of the first slider 400 is in contact with the guide inclined surface. When the driving member 40 is subjected to external pressure and moves toward the distal end, the end of the first slider 400 is pressed on the pressure surface of the first guide groove 310, which can drive the push rod 31 to move toward the distal end. When the driving member 40 is pressed by the outside and moves toward the proximal end, the end of the first slider 400 is separated from the pressure surface of the first guide groove 310. At the same time, due to the interaction between the end of the first slider 400 and the guide slope of the first guide groove 310, the first slider 400 is pressed and deformed relative to the driving member 40 under the action of the guide slope, so that the first slider 400 can be separated from the first guide groove 310. After that, the driving member 40 continues to move toward the proximal end, and the first slider 400 follows the driving member 40 to move toward the proximal end until it is stuck in the next first guide groove 310.

[0044] Combination Figure 3 and Figure 4 As shown in , the drive assembly 4 in this embodiment also includes a locking member, and a plurality of abutment portions arranged at intervals are provided along the length direction of the push rod 31. The locking member abuts against the abutment portion to limit the proximal movement of the push rod 31 to the handle 1, and the locking member avoids the abutment portion by moving relative to the handle 1 when the push rod 31 moves toward the distal end of the sleeve 2. By cooperating with the abutment portion on the push rod 31, the locking member can limit the proximal movement of the push rod 31, and at the same time, the locking member can avoid the abutment portion during the process of the push rod 31 moving toward the distal end to avoid hindering the push rod 31 from moving toward the distal end. It is easy to understand that in other optional embodiments, the number of abutment portions can also be set to one.

[0045] Specifically in this embodiment, the locking member is a second slider 410 that can be elastically deformed, and the abutting portion is a second guide groove 311 that meshes with the second slider 410. By setting the second slider 410 and the second guide groove 311 as the locking member and the abutting portion respectively, the required function can be achieved, and it is convenient for manufacturing and assembly. The meshing cooperation described here means that the opening direction of the second guide groove 311 is toward the proximal direction, and the second guide groove 311 has a pressure surface facing the proximal end and a guide inclined surface inclined relative to the pressure surface. After the second slider 410 is inserted into the second guide groove 311, the side surface of the end of the second slider 410 facing the distal end abuts against the pressure surface, and at the same time, the side surface of the end of the second slider 410 fits with the guide inclined surface. When the push rod 31 moves toward the distal end driven by the driving member 40, the side of the second slider 410 interacts with the guiding slope of the second guide groove 311, and the second slider 410 deforms relative to the handle 1 under the pressure of the guiding slope, and then the second slider 410 disengages from the second guide groove 311 until the push rod 31 moves forward so that the next second guide groove 311 is aligned with the second slider 410, and the second slider 410 is inserted into the next second guide groove 311. When the driving member 40 moves toward the proximal end, the first slider 400 interacts with the push rod 31, but the end of the second slider 410 abuts against the pressure surface of the second guide groove 311, so that the push rod 31 cannot move toward the proximal end.

[0046] Along the length direction of the push rod 31, the first guide groove 310 and the second guide groove 311 in this embodiment are respectively located on both sides of the push rod 31. The spacing between two adjacent first guide grooves 310 is not less than the length dimension of the implant 7, and similarly, the spacing between two adjacent second guide grooves 311 is not less than the length dimension of the implant 7.

[0047] In this embodiment, the meshing cooperation between the first guide groove 310 and the first slider 400, and the meshing cooperation between the second guide groove 311 and the second slider 410 also have the following effects: during operation, after each firing operation, a prompt sound can be generated between the first guide groove 310 and the first slider 400 through the deformation of the first slider 400, and similarly, a prompt sound can be generated between the second guide groove 311 and the second slider 410 through the deformation of the second slider 410. The prompt sound can remind the operator that the firing operation is successful, and can ensure that the second slider 410 is stuck in the second guide groove 311, ensuring that the push rod 31 cannot retreat.

[0048] Further, combined with Figure 4 and Figure 5As shown in , the unlocking mechanism in this embodiment includes a pusher 5 provided with a handle 1, the pusher 5 abuts against the drive assembly 4 and is used to push the drive assembly 4 to separate from the push rod 31 to release the restriction. The drive assembly 4 can be pushed to separate from the push rod 31 by providing the pusher 5, so that the push rod 31 can move toward the proximal end. Specifically, the pusher 5 has a first pusher 50 and a second pusher 51, the first pusher 50 is used to push the first slider 400, and the second pusher 51 is used to push the second slider 410. The external force applies pressure to the pusher 5 to drive the pusher 5 to move toward the distal end. During the movement, the pusher 5 can apply pressure to the first slider 400 and the second slider 410 respectively through the first pusher 50 and the second pusher 51, and the first slider 400 and the second slider 410 are respectively deformed under the pressure of the pusher 5 and are disengaged from the first guide groove 310 and the second guide groove 311 through the deformation. In this way, the pusher 31 can move toward the proximal end, which is convenient for reloading the implant 7 into the sleeve 2.

[0049] Furthermore, the handle 1 in this embodiment includes a housing 10 and a cover plate 11 detachably provided on the housing 10, and the cover plate 11 can switch between an initial position and a pushing position relative to the housing 10 in a disassembled state. The pusher 5 is provided between the driving assembly 4 and the cover plate 11, and the pusher 5 is driven by the cover plate 11 during the sliding process of the cover plate 11 from the initial position to the pushing position to push the driving assembly 4 to separate from the pushing rod 31. By providing the cover plate 11 detachable relative to the housing 10, it is convenient for the operator to operate from the outside of the handle 1, and by pushing the cover plate 11, the pusher 5 can be driven to push the driving assembly 4 to separate from the pushing rod 31. In this embodiment, a first elastic member 112 is also provided between the cover plate 11 and the housing 10. Specifically, the first elastic member 112 is a compression spring, one end of which abuts against the cover plate 11 and applies pressure to the cover plate 11 so that the cover plate 11 has a tendency to move to the initial position. In this way, after completing the operation of loading the implant 7, the operator can cancel the pressure on the cover plate 11, and the cover plate 11 can drive the pusher 5 to move proximally and return to its original position under the elastic force of the first elastic member 112. At the same time, after losing the pressure of the pusher 5, the first slider 400 and the second slider 410 are respectively inserted into the first guide groove 310 and the second guide groove 311 through deformation.

[0050] More specifically, combined Figure 2 , Figure 5 and Fig.10As shown in , the housing 10 in this embodiment includes a first half shell 100 and a second half shell 101, and the first half shell 100 and the second half shell 101 are locked and fixed. The housing 10 is formed with an opening 103, and the opening 103 is formed with a slideway that slides with the cover plate 11. The cover plate 11 is detachably connected to the opening 103, and the pusher is clamped and positioned on the cover plate 11. In this embodiment, the cover plate 11 is locked and fixed on the first half shell 100 by the first locking screw 110. After the lock between the cover plate 11 and the first half shell 100 is released, the cover plate 11 can be pushed from the outside to slide along the slideway, thereby driving the pusher 5 to move and push the first slider 400 and the second slider 410 respectively through the first pushing portion 50 and the second pushing portion 51, so that the first slider 400 and the second slider 410 are deformed to escape from the first guide groove 310 and the second guide groove 311.

[0051] Preferably, in this embodiment, an observation window 111 for observing the advancement position of the push rod 31 is also provided on the cover plate 11. The observation window 111 is provided to facilitate the operator to observe the advancement position of the push rod 31, and then facilitate the operator to judge the number of remaining implants 7. Specifically, in this embodiment, a mark that can represent the remaining implant 7 in the sleeve 2 is also provided on the push rod 31. After each firing operation, an implant 7 is ejected. Accordingly, the push rod 31 advances once and the advancement distance is L. The above marks are arranged in sequence at intervals of L. In this way, after a firing operation, the number of remaining implants 7 can be checked from the observation window 111.

[0052] Combination Figure 2 and Figure 6 As shown in , the firing assembly 3 in this embodiment further includes a toggle rod 32 extending from the handle 1 into the sleeve 2, the proximal end of the toggle rod 32 is connected to the drive assembly 4, and a paddle 320 is provided at the distal end of the toggle rod 32, the paddle 320 is inclined toward the front of the distal end of the firing rod 30, and the paddle 320 is used to guide the implant 7 at the distal end to fall into the distal end of the sleeve 2 during the firing process. By providing the toggle rod 32, the implant 7 can be guided to fall into the distal end of the sleeve 2 through the paddle 320 on the toggle rod 32, which can improve the accuracy of the implant 7 switching position to the distal end of the sleeve 2, and avoid the occurrence of a stuck situation during the firing process.

[0053] Specifically, the toggle rod 32 in this embodiment is fixedly connected to the driving member 40 through its proximal end, so that the toggle rod 32 can move synchronously with the driving member 40 .

[0054] Further, in this embodiment, the toggle rod 32 and the firing rod 30 are arranged at intervals, the implant 7 is arranged between the toggle rod 32 and the firing rod 30, and the distal end of the push rod 31 extends between the toggle rod 32 and the firing rod 30 and abuts against the implant 7. By setting the relative positions of the toggle rod 32 and the firing rod 30, the assembly operation of the firing assembly 3 and the drive assembly 4 can be facilitated. In this embodiment, a spring piece 321 is also arranged on the surface of the toggle rod 32 on one side away from the firing rod 30, and the spring piece 321 extends from the toggle rod 32 to the inner wall of the sleeve 2 and abuts against the inner wall of the sleeve 2. By setting the spring piece 321 abutting against the inner wall of the sleeve 2, a certain pressing force can be applied to the toggle rod 32, the push rod 31 and the firing rod 30, thereby increasing the stability of the movement of the toggle rod 32, the push rod 31 and the firing rod 30 during the firing process, and preventing the toggle rod 32, the push rod 31 and the firing rod 30 from shaking during the movement.

[0055] The sleeve 2 in this embodiment includes a tube body 20 and an end cap 21. The end cap 21 is detachably connected to the distal end of the tube body 20. The distal end of the tube body 20 is formed with a loading hole 200 for loading the implant 7 into the tube body 20. With the above structural design, when the implant 7 needs to be loaded, the end cap 21 can be removed from the tube body 20 to perform the assembly operation. Specifically, as Fig.10 As shown in , in this embodiment, the end 21 is sleeved on the distal end of the tube body 20, and then a second locking screw 213 is used to lock and fix the end 21 and the tube body 20. In addition, a slot 202 is provided at the proximal end of the tube body 20, and the outer shell 10 is formed with a tubular connecting section that matches the tube body 20. The first half shell 100 and the second half shell 101 can be sleeved on the outside of the tube body 20 when they are buckled together. At the same time, a clamping block 105 that matches the slot 202 is provided inside the connecting section, and the clamping block 105 is inserted into the slot 202 to install the tube body 20 on the handle 1. In this embodiment, a screw sleeve 12 is also used to be screwed to the outside of the connecting section to further fix the tube body 20 to the handle 1. In other optional embodiments, the tube body 20, the end 21 and the handle 1 can also be fixed and installed by threaded connection, screw fastening connection, clamping, etc.

[0056] Preferably, in this embodiment, an implant observation hole 212 is further provided at the end 21, through which it can be checked whether the distal end of the sleeve has an implant 7 to be fired.

[0057] It is easy to understand that the repeated loading and fixing device provided in this embodiment also includes a driving mechanism 6 for driving the driving member 40 and the firing rod 30 to move. Figure 2 , Figure 5 , Figure 6 and Fig.10As shown in , the driving mechanism 6 includes a trigger member, a gear 60, a rack 61, a connecting member 62 and a second elastic member 630. The trigger member is an operating handle 63 that is swingably set on the housing 10. The operating handle 63 has an initial position and a firing position relative to the housing 10. When the operating handle 63 moves from the initial position to the firing position, the operating handle 63 drives the gear 60 fixed to the operating handle 63 to rotate, and the gear 60 drives the rack 61 that is meshed with the gear 60 to move. The proximal end of the firing rod 30 is fixed to the rack 61. In this embodiment, a connecting block 41 is also connected to the handle 1. The aforementioned second slider 410 is provided with the connecting block 41, and the connecting block 41 is also formed with a first limiting slide 411 and a second limiting slide 412. The connecting member 62 is rotatably set to the connecting block 41 through the rotating shaft 413. The connecting member 62 is provided with a first opening 620 and a second opening 621, the rack 61 is fixedly provided with a first pin 401 inserted into the first opening 620, the driving member 40 is provided with a second pin 610 inserted into the second opening 621, the first pin 401 is rotatable and movable relative to the first opening 620, and the second pin 610 is rotatable and movable relative to the second opening 621, that is, the size of the first opening 620 is larger than the outer diameter of the first pin 401, and the size of the second opening 621 is larger than the outer diameter of the second pin 610. In this embodiment, the first pin 401 and the second pin 610 are both round shafts, and the first opening 620 and the second opening 621 are both oblong holes. Among them, the driving member 40 is slidably provided in the first limiting slide 411, and the firing rod 30, the toggle rod 32, the push rod 31 and the rack 61 are all slidably provided in the second limiting slide 412.

[0058] The second elastic member 630 is disposed between the operating handle 63 and the housing 10, and the second elastic member 630 applies pressure to the operating handle 63 so that the operating handle 63 has a tendency to move toward the initial position. In this way, after completing the firing operation, the operator cancels the force applied to the operating handle 63, and the operating handle 63 can swing back to the initial position under the pressure of the second elastic member 630, while driving the gear 60 and the rack 61 to move, and driving the firing rod 30 and the toggle rod 32 in the firing assembly 3 to move toward the proximal end and reset.

[0059] Through the above structural design, the operator can drive the rack 61 to reciprocate between the proximal end and the distal end of the handle 1 by pulling the operating handle 63, and the rack 61 can directly drive the firing rod 30 to move synchronously. In addition, the rack 61 can drive the driving member 40 to move through the connecting member 62, and the driving member 40 can drive the toggle rod 32 fixed thereto to move synchronously. At the same time, the driving member 40 can drive the push rod 31 to move toward the distal end through the first slider 400.

[0060] Furthermore, the first pin 401, the second pin 610 and the rotating shaft 413 are arranged in parallel and at intervals, and the spacing between the first pin 401 and the rotating shaft 413 is greater than the spacing between the second pin 610 and the rotating shaft 413. Thus, the movement speed of the toggle rod 32 and the toggle rod 32 can be slower than the movement speed of the firing rod 30. In this embodiment, the firing rod 30 and the toggle rod 32 and the toggle rod 32 are designed to move differentially so that the implant 7 can switch positions more accurately (from between the firing rod 30 and the toggle rod 32 to the distal end of the sleeve 2).

[0061] It is easy to understand that in other optional embodiments, the operating handle 63 can also be designed to switch between the first position and the second position through a linear motion. Alternatively, the driving mechanism 6 of other structural forms can also be used to drive the firing assembly 3 to move with reference to the prior art.

[0062] Combination Figure 6 , Figure 7 , Figure 8 and Fig. 9 The firing operation process of the reload fixing device is described as follows:

[0063] In this embodiment, ten implants 7 are loaded at one time as an example. Figure 6 As shown, after the implants 7 are loaded, all ten implants 7 are located in the sleeve 2 and between the firing rod 30 and the toggle rod 32. Figure 7 As shown in the figure, the operator performs the firing operation, pulls the operating handle 63 to drive the firing rod 30, the push rod 31 and the toggle rod 32 to move toward the distal end. In this process, the push rod 31 will push all ten implants 7 to move forward. After the firing operation is completed, the elastic force of the second elastic member 630 will drive the firing rod 30 and the toggle rod 32 to move toward the proximal end and reset. Figure 8 As shown in FIG, since the firing rod 30 and the toggle rod 32 move at a differential speed and the toggle rod 32 is provided with a paddle 320, the implant 7 located at the distal end among the implants 7 located between the firing rod 30 and the toggle rod 32 can easily fall into the distal end of the sleeve 2. Afterwards, the firing operation is performed with the implant 7 at the front end of the firing rod 30, as shown in FIG. Fig. 9 As shown in FIG. 1 , the operator pulls the operating handle 63 to drive the firing rod 30, the pushing rod 31 and the toggle rod 32 to move distally, and the firing rod 30 pushes the implant 7 to fire the implant 7 out of the sleeve 2. After the firing operation is completed, the elastic force of the second elastic member 630 drives the firing rod 30 and the toggle rod 32 to move proximally to reset, and the repeated loading fixture is in the same state as above. Figure 8 Afterwards, the operator can continue to perform the firing operation until the implant 7 is completely ejected.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. Repeated loading fixture, characterized in that ,include: A handle (1) having a proximal end and a distal end; A sleeve (2) is provided at the distal end of the handle (1); An implant (7) is arranged in the sleeve (2); A firing assembly (3), comprising a firing rod (30) and a pushing rod (31), wherein the firing rod (30) and the pushing rod (31) extend from the handle (1) into the sleeve (2), the pushing rod (31) pushes the implant (7) toward the distal end, and the firing rod (30) fires the implant (7) located at the farthest end; a driving assembly (4) for driving the push rod (31) to move distally and limiting the push rod (31) from moving proximally to the handle (1), and The unlocking mechanism releases the restriction to enable the pushing rod (31) to move toward the proximal end of the handle (1).

2. The reload fixture as claimed in claim 1, characterized in that: The driving assembly (4) comprises a driving member (40) capable of reciprocating between the proximal end and the distal end of the handle (1), the driving member (40) being provided with an elastic arm and at least one guiding portion being provided along the length direction of the pushing rod (31); When the elastic arm moves toward the distal end along with the driving member (40), the elastic arm abuts against the guide portion to drive the push rod (31) to move toward the distal end; when the elastic arm moves toward the proximal end along with the driving member (40), it avoids the guide portion by moving relative to the driving member (40).

3. The reload fixture as claimed in claim 2, characterized in that: The elastic arm is specifically a first slider (400), the first slider (400) is elastically deformable, and the guide portion is a first guide groove (310) meshing with the first slider (400).

4. The reload fixture according to any one of claims 1 to 3, characterized in that: The driving assembly (4) further comprises a locking member, and at least one abutment portion is provided along the length direction of the pushing rod (31); The locking piece abuts against the abutment portion to limit the proximal movement of the pushing rod (31), and when the pushing rod (31) moves toward the distal end of the sleeve (2), the locking piece avoids the abutment portion by moving relative to the handle (1).

5. The reload fixture as claimed in claim 4, characterized in that: The locking member is specifically a second sliding block (410) capable of elastic deformation, and the abutting portion is a second guide groove (311) meshingly matched with the second sliding block (410).

6. The reload fixture of claim 1, wherein: The unlocking mechanism comprises a pushing member (5) provided with a handle (1), wherein the pushing member (5) abuts against the driving assembly (4) and is used to push the driving assembly (4) to separate from the pushing rod (31) so as to release the restriction.

7. The reload fixture of claim 6, wherein: The handle (1) comprises a shell (10) and a cover plate (11) detachably arranged on the shell (10); the cover plate (11) can be switched between an initial position and a pushed position relative to the shell (10) in a detached state; The pushing member (5) is arranged between the driving assembly (4) and the cover plate (11), and the pushing member (5) is driven by the cover plate (11) to push the driving assembly (4) and the pushing rod (31) to separate when the cover plate (11) moves from the initial position to the pushing position.

8. The reload fixture of claim 1, wherein: The firing assembly (3) further comprises a toggle rod (32) extending from the handle (1) into the sleeve (2), wherein the proximal end of the toggle rod (32) is connected to the drive assembly (4), and a paddle (320) is arranged at the distal end of the toggle rod (32), wherein the paddle (320) is inclined toward the distal end, and the paddle (320) is used to guide the implant (7) at the distal end to fall into the distal end of the sleeve (2) during the firing process.

9. The reload fixture of claim 8, wherein: The toggle rod (32) and the firing rod (30) are arranged at intervals, the implant (7) is arranged between the toggle rod (32) and the firing rod (30), and the distal end of the push rod (31) extends between the toggle rod (32) and the firing rod (30) and abuts against the implant (7).

10. The reload fixture of claim 1, wherein: The sleeve (2) comprises a tube body (20) and an end head (21), wherein the end head (21) is detachably connected to the distal end of the tube body (20), and a loading hole (200) is formed at the distal end of the tube body (20) for loading an implant (7) into the tube body (20).

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