Continuous percussion fixing device

Abstract

The utility model relates to a continuous percussion fixing device, which belongs to the technical field of medical instruments, and comprises a handle, a percussion rod, a percussion rod and a percussion rod, and is characterized in that the handle is provided with a near end and a far end; the sleeve is arranged at the far end of the handle; the percussion assembly comprises a percussion rod and a pushing rod, and the percussion rod and the pushing rod extend into the sleeve from the handle; the driving assembly is arranged in the handle and drives the percussion rod and the pushing rod to move; the at least one implant is positioned in the sleeve and is arranged above the percussion rod; the pushing rod pushes the implants to the far end of the sleeve one by one, and the percussion rod percussion the implant located at the farthest end. By applying the device, the implant can be continuously triggered, the operation of a soft tissue repair operation is simplified, and the operation time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a continuous firing fixation device. Background Technology

[0002] Biological patches are widely used in surgery, especially in tendons, ligaments, and other connective tissues that connect bones and muscles. With advancements in medical technology, biological patches not only provide immediate structural support but also promote tissue regeneration within the body, thus accelerating the healing process. For torn or severely damaged soft tissues, biological patches offer an effective alternative, strengthening local tissues and creating favorable conditions for new tissue growth by fixing the patch to the damaged area. However, to ensure stable attachment of the biological patch to the soft tissue being repaired, specially designed fixators are necessary. Traditional fixation methods typically rely on sutures or metal staples, but these methods can cause additional trauma and, in some cases, are difficult to guarantee long-term stability. In contrast, modern fixators employ a more advanced design concept; they can directly penetrate the biological patch and integrate tightly with the soft tissue by ejecting the fixation implant, forming a stable point. Therefore, in practical clinical applications, physicians face the dual challenge of pursuing both high efficiency and ensuring safety.

[0003] Biological patches typically require six or more fixation implants to secure them to the soft tissue being repaired. Therefore, the operator often needs to repeatedly insert and remove the fixation implants and fire the fixation devices into and out of the body during a single repair surgery, making the procedure complex and time-consuming. Utility Model Content

[0004] Therefore, it is necessary to provide a continuous firing fixation device to address the problem that tendon fixators cannot continuously fire implants.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution: a continuous firing fixing device, comprising:

[0006] The handle has a proximal end and a distal end;

[0007] A sleeve is provided at the distal end of the handle;

[0008] The firing assembly includes a firing lever and a pusher lever, the firing lever and the pusher lever extending from the handle into the sleeve;

[0009] A drive assembly, disposed within the handle and driving the firing lever and push lever to move; and,

[0010] At least one implant is placed inside the cannula;

[0011] The push rod pushes the implants one by one to the distal end of the cannula, and the firing rod fires the implant located at the distal end.

[0012] The application of this application has the following beneficial effects: By setting up a firing assembly and a driving assembly, the driving assembly drives the firing rod and the push rod to move. The push rod, through its movement, can push the implants one by one to the distal end of the cannula, and the firing rod, through its movement, can fire the implants located at the distal end of the cannula. In this way, the operator can continuously fire multiple implants one by one through the driving assembly.

[0013] In one embodiment, the drive assembly includes a drive gear and a rack meshing with the drive gear. The rack reciprocates between the proximal and distal ends of the handle under the drive of the drive gear. The proximal end of the firing lever is equipped with the rack and moves with it. The push rod is connected to the rack and can move unidirectionally distally under the drive of the rack. By using the drive gear and rack, the firing lever is driven by the rack to move synchronously with it, thereby firing the implant. Simultaneously, the push rod is driven unidirectionally distally by the rack, and during this unidirectional distal movement, multiple implants can be pushed one by one to the distal end of the cannula during continuous firing.

[0014] In one embodiment, the drive assembly further includes a connecting rod that is pivotally mounted within the handle via a pivot shaft. Both the transmission rack and the push rod are connected to the connecting rod. The connecting rod is configured to pivot under the drive of the transmission rack, and this pivoting motion drives the push rod to move. The push rod's movement speed is slower than that of the firing lever. By configuring the connecting rod, the differential movement of the push rod and the firing lever can be controlled. The implant is positioned above the firing lever, and this differential movement allows the implant located above the firing lever to fall to the farthest end of the cannula.

[0015] In one embodiment, the drive assembly further includes a connecting frame, through which the connecting rod drives the push rod to move. The connecting rod has a first opening and a second opening. The transmission rack has a first pin that is rotatably and movably inserted into the first opening, and the connecting frame has a second pin that is rotatably and movably inserted into the second opening. The distance between the first pin and the rotating shaft is greater than the distance between the second pin and the rotating shaft. Differential drive control of the push rod and the firing rod can be achieved through the structural design of the connecting rod. Furthermore, the movement speed of the push rod and the firing rod can be controlled by designing the ratio of the distance between the first pin and the rotating shaft to the distance between the second pin and the rotating shaft.

[0016] In one embodiment, at least one guide portion is provided along the length of the push rod, and the connecting frame is provided with an elastic arm. When the elastic arm moves distally with the connecting frame, it abuts against the guide portion, causing the push rod to move distally. When the elastic arm moves proximally with the connecting frame, it avoids the guide portion by deforming relative to the connecting frame. Through the cooperation between the elastic arm on the connecting frame and the guide portion on the push rod, the connecting frame can drive the push rod distally during its movement distally, and the connecting frame can avoid the guide portion during its movement proximally to prevent the push rod from moving proximally.

[0017] In one embodiment, at least one abutment is provided along the length of the push rod, and a connecting block is provided inside the handle. The connecting block has a locking member. The locking member abuts against the abutment to restrict the push rod from moving proximally, and the locking member avoids the abutment by deforming relative to the handle when the push rod moves towards the distal end of the sleeve. By cooperating with the abutment on the push rod, the locking member restricts the push rod from moving proximally, while simultaneously avoiding the abutment during the push rod's movement towards the distal end to prevent obstruction of the push rod's movement towards the distal end.

[0018] In one embodiment, the firing assembly further includes a toggle lever extending from the handle into the cannula; the proximal end of the toggle lever is connected to and movable under the drive of the drive assembly, and the distal end of the toggle lever is provided with a paddle for guiding the implant to the distal end of the cannula. The toggle lever facilitates movement of the implant to the distal end of the cannula.

[0019] In one embodiment, the actuating lever is spaced apart from the firing lever and located above the firing lever, the implant is disposed between the actuating lever and the firing lever, and the distal end of the pusher extends between the firing lever and the actuating lever and abuts against the implant.

[0020] In one embodiment, the handle is equipped with a trigger connected to the drive assembly and used to actuate the drive assembly. The trigger facilitates pressure application to the drive assembly by the operator from outside the handle.

[0021] In one embodiment, the handle is further provided with a limiting member, which has a limited state and a disengaged state relative to the trigger member. In the limited state, the limiting member restricts the movement of the trigger member; in the disengaged state, the limiting member is separated from the trigger member. The limiting member is configured to respond to an external force and switch from the limited state to the disengaged state. The limiting member restricts the trigger member, and when the operator needs to perform a firing operation, the limiting member must first be switched to the disengaged state before operating the trigger member, thus preventing accidental operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the continuous firing fixing device provided in the embodiments of this application;

[0023] Figure 2 For continuous firing of fixed devices explosion Figure 1 ;

[0024] Figure 3 For continuous firing of fixed devices explosion Figure 2 ;

[0025] Figure 4 This is a cross-sectional view of the sleeve, firing pin, extension rod, and tendon screw after the tendon screw has been loaded.

[0026] Figure 5 A cross-sectional view of the cannula, firing pin, extension rod, and tendon nail during the first firing operation;

[0027] Figure 6 A cross-sectional view of the cannula, firing pin, extension rod, and tendon nail after the firing operation;

[0028] Figure 7 A cross-sectional view of the firing operation when the cannula, firing rod, extension rod, and tendon nail are present at the distal end of the cannula.

[0029] Figure 8 This is a schematic diagram showing the connection between the connecting block and the firing assembly;

[0030] Figure 9 A cross-sectional view of the connecting block, connecting frame, push rod, and push bracket;

[0031] Figure 10 For continuous firing of fixed devices explosion Figure 3 .

[0032] Reference numerals: 1. Handle; 10. Outer shell; 100. First half-shell; 101. Second half-shell; 102. Sliding hole; 104. Cylindrical shell; 1040. Rectangular groove; 105. Locking block; 11. Top cover; 110. Observation window; 12. Tightening sleeve; 2. Sleeve; 20. Tube body; 201. Locking groove; 21. End; 210. Implant observation hole; 211. Locking screw; 3. Firing assembly; 30. Connecting bracket; 300. Second pin; 301. First slider; 31. Actuating lever; 310. Paddle; 311. Spring. 32. Push rod; 320. First guide groove; 321. Second guide groove; 33. Firing rod; 4. Drive assembly; 40. Trigger; 41. Drive gear; 42. Transmission rack; 420. First pin; 43. Connecting rod; 430. First opening; 431. Second opening; 44. First elastic element; 45. Limiting element; 450. Limiting part; 451. Annular flange; 46. Second elastic element; 5. Connecting block; 50. Second slider; 51. First limiting slide; 52. Second limiting slide; 53. Rotating shaft; 6. Implant. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. The proximal end refers to the end of the continuous firing device that is relatively close to the operator during use, and the distal end refers to the end of the continuous firing device that is relatively far from the operator during use.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set" on another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] This embodiment provides a continuous firing fixing device, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the continuous firing fixation device includes a handle 1, a sleeve 2, a firing assembly 3, a drive assembly 4, and at least one implant 6. The handle 1 has a proximal end and a distal end, as shown... Figure 1As shown, arrow S points towards the proximal end, and arrow P points towards the distal end. The cannula 2 is located at the distal end of the handle 1. The firing assembly 3 includes a firing lever 33 and a push lever 32, which extend from the handle 1 into the cannula 2. A drive assembly 4 is located within the handle 1 and drives the firing lever 33 and push lever 32 to move. The implant 6 is located within the cannula 2. In this embodiment, the implant 6 is used to fix the biological patch to soft tissue. The push lever 32 pushes the implants 6 one by one to the distal end of the cannula 2, and the firing lever 33 fires the implants 6 located at the distal end of the cannula 2.

[0040] By setting up a firing assembly 3 and a driving assembly 4, the driving assembly 4 drives the firing rod 33 and the push rod 32 to move. The push rod 32, through its movement, can push the implants 6 one by one to the distal end of the cannula 2. The firing rod 33, through its movement, can fire the implants 6 located at the distal end of the cannula 2. In this way, the operator can continuously fire multiple implants 6 one by one through the driving assembly 4. The implants 6 are arranged sequentially and abut against each other. By applying a pushing force to the implant 6 located at the nearest end by the push rod 32, the sequentially arranged implants 6 can be pushed one by one to the distal end of the cannula 2. Setting the push rod 32 to push the implants 6 one by one to the distal front of the firing rod 33, instead of using the firing rod 33 to directly push and fire multiple arranged implants 6, can avoid problems such as implant 6 accumulation and difficulty in applying force. This continuously firing and fixing device can continuously fire the implants 6. In this embodiment, ten implants 6 are placed inside the cannula 2. Therefore, the continuously firing and fixing device can continuously fire ten implants 6, meeting the usage requirements of most application scenarios. It is easy to understand that in other optional embodiments, one or more implants 6 can also be provided.

[0041] The drive assembly 4 in this embodiment includes a drive gear 41 and a transmission rack 42 meshing with the drive gear 41. The transmission rack 42 can reciprocate between the proximal and distal ends of the handle 1 under the drive of the drive gear 41. The transmission rack 42 is provided at the proximal end of the firing lever 33 and moves synchronously with the transmission rack 42. The push rod 32 is connected to the transmission rack 42 and can move unidirectionally to the distal end under the drive of the transmission rack 42. By setting the drive gear 41 and the transmission rack 42, the transmission rack 42 drives the firing lever 33 to move synchronously with it to achieve the firing of the implant 6. At the same time, the transmission rack 42 drives the push rod 32 to move unidirectionally to the distal end. During the unidirectional movement of the push rod to the distal end, multiple implants 6 can be pushed one by one to the distal end of the cannula 2 during continuous firing.

[0042] Furthermore, in combination Figure 8 and Figure 9As shown, the drive assembly 4 in this embodiment also includes a connecting rod 43, which is oscillatingly mounted inside the handle 1 via a rotating shaft 53. The transmission rack 42 and the push rod 32 are both connected to the connecting rod 43. The connecting rod 43 is configured to oscillate under the drive of the transmission rack 42, and the oscillating motion drives the push rod 32 to move. The movement speed of the push rod 32 is slower than that of the firing lever 33. By setting the connecting rod 43, the differential movement of the push rod 32 and the firing lever 33 can be controlled. The implant 6 is positioned above the firing lever 33, and the differential movement allows the implant 6, located above the firing lever 33, to fall into the distal end of the cannula 2. Specifically, in this embodiment, a connecting block 5 is fixedly installed inside the handle 1, and the rotating shaft 53 is mounted on the connecting block 5. A first limiting slide 51 and a second limiting slide 52 are also provided on the connecting block 5. The firing lever 33, the push rod 32, and the transmission rack 42 are all slidably mounted within the second limiting slide 52. Furthermore, the drive component 4 in this embodiment also includes a connecting frame 30. The connecting rod 43 drives the push rod 32 to move through the connecting frame 30. Specifically, the connecting frame 30 is slidably set within the first limiting slide rail 51.

[0043] In this embodiment, the connecting rod 43 is provided with a first opening 430 and a second opening 431. The transmission rack 42 is provided with a first pin 420 that can be rotatably and movablely inserted into the first opening 430. The connecting frame 30 is provided with a second pin 300 that can be rotatably and movablely inserted into the second opening 431. The distance between the first pin 420 and the rotating shaft 53 is greater than the distance between the second pin 300 and the rotating shaft 53. Through the structural design of the connecting rod 43, differential drive control of the push rod 32 and the firing rod 33 can be realized. At the same time, the movement speed of the push rod 32 and the firing rod 33 can be controlled by designing the ratio of the distance between the first pin 420 and the rotating shaft 53 and the distance between the second pin 300 and the rotating shaft 53.

[0044] In this embodiment, the push rod 32 is provided with multiple guide portions and abutment portions arranged at intervals along its length direction. The guide portions and abutment portions are located on both sides of the push rod 32 along its length direction. The connecting frame 30 is provided with an elastic arm. Specifically, in this embodiment, the elastic arm is a first slider 301 that applies pressure to the guide portion and drives the push rod 32 to move when the connecting frame 30 moves toward the distal end of the handle 1. When the connecting frame 30 moves toward the proximal end of the handle 1, the first slider 301 avoids the guide portion by deforming relative to the connecting frame 30. Through the cooperation between the first slider 301 on the connecting frame 30 and the guide portion on the push rod 32, the connecting frame 30 can drive the push rod 32 to move toward the distal end during its movement toward the distal end, and the connecting frame 30 can avoid the guide portion during its movement toward the proximal end to prevent the push rod 32 from moving toward the proximal end.

[0045] Additionally, the connecting block 5 is equipped with a locking element that can deform relative to it. Specifically, in this embodiment, the locking element is a second slider 50. The second slider 50 abuts against the abutment portion to restrict the movement of the push rod 32 towards the proximal end of the handle 1, and the second slider 50 avoids the abutment portion by deforming relative to the handle 1 when the push rod 32 moves towards the distal end of the sleeve 2. By cooperating with the abutment portion on the push rod 32, the second slider 50 can restrict the movement of the push rod 32 towards the proximal end. At the same time, the second slider 50 can avoid the abutment portion during the movement of the push rod 32 towards the distal end to avoid obstructing the movement of the push rod 32 towards the distal end.

[0046] Specifically, the guiding part is the first guide groove 320, which engages with the first slider 301. The abutting part is the second guide groove 321, which engages with the second slider 50. The "engagement of the first guide groove 320 with the first slider 301" means that when the connecting frame 30 moves to the distal end, the engagement of the first slider 301 with the first guide groove 320 drives the push rod 32 to move to the distal end. When the connecting frame 30 moves to the proximal end, the push rod 32 cannot move synchronously due to the limitation imposed by the second slider 50. Under the action of the inner wall of the first guide groove 320, the first slider 301 deforms relative to the connecting frame 30 and disengages from the first guide groove 320. Then, the first slider 301 follows the connecting frame 30 to the proximal end. When the first slider 301 aligns with the adjacent first guide groove 320, it re-engages into the first guide groove 320 through deformation. The "engagement of the second guide groove 321 with the second slider 50" refers to the following: the opening of the second guide groove 321 faces the proximal end. After the second slider 50 is inserted into the second guide groove 321, when the push rod 32 is subjected to a force from the connecting frame 30 pointing towards the distal end, the inner wall of the second guide groove 321 presses against the second slider 50, causing the second slider 50 to deform relative to the connecting block 5 and disengage from the second guide groove 321. As the push rod 32 moves towards the distal end, the adjacent second guide groove 321 moves to align with the second slider 50, and the second slider 50 re-engages into the second guide groove 321 through deformation. When the connecting frame 30 moves towards the proximal end, the engagement between the second slider 50 and the inner wall of the second guide groove 321 limits the push rod 32, preventing it from moving towards the proximal end along with the connecting frame 30.

[0047] Along the length of the push rod 32, in this embodiment, the first guide groove 320 and the second guide groove 321 are located on both sides of the push rod 32. The distance between two adjacent first guide grooves 320 is not less than the length of the implant 6, and similarly, the distance between two adjacent second guide grooves 321 is not less than the length of the implant 6.

[0048] In this embodiment, the engagement between the first guide groove 320 and the first slider 301, and the engagement between the second guide groove 321 and the second slider 50, also have the following effects: During operation, after each firing operation, the first guide groove 320 and the first slider 301 can generate a prompt sound through the deformation of the first slider 301. Similarly, the second guide groove 321 and the second slider 50 can also generate a prompt sound through the deformation of the second slider 50. The prompt sound can remind the operator that the firing operation was successful and can ensure that the second slider 50 is engaged in the second guide groove 321, ensuring that the push rod 32 cannot retract.

[0049] The firing assembly 3 in this embodiment also includes a toggle lever 31, which extends from the handle 1 into the cannula 2. The proximal end of the toggle lever 31 is connected to the drive assembly 4 and can move under the drive of the drive assembly 4. The distal end of the toggle lever 31 is provided with a paddle 310, which is used to guide the implant 6 to the distal end of the cannula 2. The toggle lever 31 is used to move the implant 6 to the distal end of the cannula 2 more easily. Furthermore, the toggle lever 31 is spaced apart from the firing lever 33 and is located above the firing lever 33. The implant 6 is positioned between the toggle lever 31 and the firing lever 33. The distal end of the push lever 32 extends into the space between the firing lever 33 and the toggle lever 31 and abuts against the implant 6.

[0050] Specifically, in this embodiment, the actuating lever 31 is fixedly connected to the connecting frame 30 in the drive assembly 4 via its proximal end, thereby allowing the actuating lever 31 to move synchronously with the connecting frame 30. When the operator drives the connecting frame 30 and the firing lever 33 through the drive assembly 4, the distal end of the firing lever 33 can push against the implant 6 located at the distal end of the cannula 2, firing the implant 6. Simultaneously, the actuating lever 31 also moves distally, and the movement speed of the actuating lever 31 is slower than that of the firing lever 33. As mentioned above, the implant 6 is positioned between the firing lever 33 and the actuating lever 31. Because the firing lever 33 moves faster, when the firing lever 33 retracts and resets, the implant 6 loses the support of the firing lever 33 and is guided by the actuating plate 310. Thus, the implant 6 can accurately fall from between the firing lever 33 and the actuating lever 31 into the distal end of the cannula 2 and is located in front of the distal end of the firing lever 33.

[0051] Preferably, in this embodiment, a spring piece 311 is also provided on the surface of the actuating lever 31 facing away from the firing lever 33. The spring piece 311 extends from the actuating lever 31 toward the inner wall of the sleeve 2 and abuts against the inner wall of the sleeve 2. By providing the spring piece 311 that abuts against the inner wall of the sleeve 2, a certain clamping force can be applied to the actuating lever 31, the push lever 32, and the firing lever 33, increasing the stability of the actuating lever 31, the push lever 32, and the firing lever 33 as they move toward the distal end during firing, and preventing the actuating lever 31, the push lever 32, and the firing lever 33 from shaking during movement.

[0052] In this embodiment, the sleeve 2 includes a tube body 20 and an end 21. The proximal end of the tube body 20 is fixed to the handle 1, and the end 21 is detachably connected to the distal end of the tube body 20. Specifically, in this embodiment, the end 21 is sleeved onto the distal end of the tube body 20, and then a locking screw 211 is used to lock the end 21 to the tube body 20. In addition, the handle 1 in this embodiment includes a housing 10, which includes a first half-shell 100 and a second half-shell 101. A slot 201 is provided at the proximal end of the tube body 20, and the housing 10 forms a tubular connecting section that cooperates with the tube body 20. During the process of the first half-shell 100 and the second half-shell 101 being fastened together, the connecting section can be sleeved on the outside of the tube body 20. At the same time, a locking block 105 that cooperates with the slot 201 is provided inside the connecting section. The locking block 105 is inserted into the slot 201 to install the tube body 20 onto the handle 1. In this embodiment, the screw-on sleeve 12 is also tightened to the outside of the connecting section to further fix the tube body 20 to the handle 1. In other optional embodiments, threaded connection, screw fastening connection, snap-fit, etc. can also be used to fix the tube body 20 to the end 21 and the handle 1. Preferably, in this embodiment, an implant observation hole 210 is also provided at the end 21. Through the implant observation hole 210, it is possible to check whether the distal end of the tube has the implant 6 to be fired, that is, to observe whether the implant 6 to be fired is accurately positioned.

[0053] Combination Figure 2 and Figure 10 As shown, the handle 1 in this embodiment also includes an upper cover 11 on the outer casing 10. The upper part of the outer casing 10 has an opening, and the upper cover 11 has an opening. The upper cover 11 also has an observation window 110 for observing the advancement position of the push rod 32. The observation window 110 facilitates the operator's observation of the advancement position of the push rod 32, thereby facilitating the operator's determination of the number of remaining implants 6. Specifically, in this embodiment, an indicator that can represent the remaining implants 6 in the cannula 2 is also provided on the push rod 32. After each firing operation, one implant 6 is ejected, and correspondingly, the push rod 32 advances once with a distance of L. The aforementioned indicators are arranged sequentially at intervals of L. In this way, after one firing operation, the number of remaining implants 6 can be viewed from the observation window 110.

[0054] In this embodiment, a trigger 40 is also provided on the handle 1. The trigger 40 is connected to the drive assembly 4 and is used to drive the drive assembly 4 to move. The trigger 40 facilitates the operator to apply pressure to the drive assembly 4 from outside the handle 1. The trigger 40 has an initial position and a firing position relative to the handle 1. During the process of moving from the initial position to the firing position, the trigger 40 can drive the drive gear 41 to rotate, which in turn drives the transmission rack 42 to move to the distal end. Specifically, in this embodiment, the trigger 40 is a wrench that is oscillatingly connected to the handle 1. The end of the wrench is fixedly connected to the drive gear 41. The operator can drive the drive gear 41 to rotate by turning the wrench. Furthermore, in this embodiment, a first elastic member 44 is provided between the trigger 40 and the handle 1. The first elastic member 44 applies pressure to the trigger 40 so that the trigger 40 tends to move to the initial position. In this way, when the operator removes the force on the wrench, under the elastic force of the first elastic member 44, the wrench swings back to the initial position, which can drive the drive gear 41 to reverse, which in turn drives the transmission rack 42 to move to the proximal end.

[0055] Furthermore, to prevent accidental wrench operation by the operator, the handle 1 in this embodiment is also equipped with a limiting member 45. The limiting member 45 has a limiting state and a disengaged state relative to the trigger member 40. In the limiting state, the limiting member 45 restricts the movement of the trigger member 40; in the disengaged state, the limiting member 45 is separated from the trigger member 40. The limiting member 45 is configured to respond to external force and switch from the limiting state to the disengaged state. By providing the limiting member 45, the trigger member 40 can be limited. When the operator needs to perform a firing operation, the limiting member 45 must first be switched to the disengaged state before operating the trigger member 40, thus preventing accidental operation by the operator.

[0056] Specifically, the limiting member 45 is fixedly provided with a limiting part 450. When the limiting member 45 is in the limiting state, the limiting part 450 abuts against the wrench to restrict the wrench to a first position. When the limiting member 45 is in the disengaged state, the limiting part 450 separates from the wrench to release the restriction. In this way, the firing operation must apply force to both the limiting member 45 and the wrench simultaneously, which can avoid misoperation. In this embodiment, the limiting member 45 is shaft-shaped. In this embodiment, the handle 1 is provided with a through sliding hole 102. The limiting member 45 is slidably disposed in the sliding hole 102, and two annular flanges 451 are formed on the limiting member 45 and spaced apart along its axial direction. A second limiting member 45 is provided between the inner wall of the handle 1 and the annular flange 451. The second elastic member 46 includes two compression springs. One compression spring is sleeved outside the limiting member 45 and its two ends abut against one annular flange 451 and the inner wall of the handle 1, respectively. The other compression spring is sleeved outside the limiting member 45 and its two ends abut against another annular flange 451 and the inner wall of the handle 1, respectively. In this way, the limiting member 45 can be pressed from both sides of the handle 1, which is convenient for left-handed and right-handed users to operate according to their usage habits. In addition, a cylindrical shell 104 is formed on the inner wall of the handle 1. The limiting member 45 passes through the cylindrical shell 104. A rectangular groove 1040 is provided on the cylindrical shell 104, and the limiting part 450 extends out of the cylindrical shell 104 from the rectangular groove 1040. The limiting part 450 and the limiting member 45 can be circumferentially limited by the inner wall of the rectangular groove 1040 along the circumference of the cylindrical shell 104, preventing the limiting member 45 from rotating circumferentially along the sliding hole 102.

[0057] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 The firing operation process of this continuous firing stationary device is described below:

[0058] like Figure 4 As shown, immediately after the implant 6 was loaded, all ten implants 6 were located within the cannula. Figure 5 As shown, the operator performs a firing operation, pulling the lever to move the firing rod 33, push rod 32, and actuating rod 31 distally. During this process, the push rod 32 pushes all ten implants 6 distally. After the firing operation is completed, the elastic force of the first elastic element 44 moves the firing rod 33 and actuating rod 31 proximally. Figure 6 As shown, due to the differential movement of the firing lever 33 and the actuating lever 31, and the presence of a paddle 310 on the actuating lever 31, the distal implant 6 of the implant 6 located between the firing lever 33 and the actuating lever 31 easily falls into the distal end of the cannula 2. Then, the firing operation is performed with the implant 6 present at the distal end of the cannula 2, as... Figure 7As shown, when the operator pulls the lever, the firing lever 33, push lever 32, and actuating lever 31 move distally. The firing lever 33 pushes the implant 6, thus firing the implant 6 and ejecting it from the cannula 2. After firing, the first elastic element 44, under its elastic force, moves the firing lever 33 and actuating lever 31 proximally to reset, and the continuous firing fixing device returns to its original position. Figure 6 The state shown in the image. Afterwards, the operator can continue firing until the implant 6 is fully ejected.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0060] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A continuous firing fixing device, characterized in that, include: Handle (1), having a proximal end and a distal end; Sleeve (2), which is provided at the distal end of the handle (1); The firing assembly (3) includes a firing lever (33) and a pusher lever (32) extending from the handle (1) into the sleeve (2); Drive assembly (4), disposed within the handle (1) and driving the firing lever (33) and push lever (32) to move; and, At least one implant (6) is placed inside the cannula (2); The push rod (32) pushes the implants (6) one by one to the distal end of the cannula (2), and the firing rod (33) fires the implant (6) located at the distal end.

2. The continuous firing fixing device as described in claim 1, characterized in that, The drive assembly (4) includes a drive gear (41) and a transmission rack (42) meshing with the drive gear (41). The transmission rack (42) can reciprocate between the proximal and distal ends of the handle (1) under the drive of the drive gear (41). The firing rod (33) has a transmission rack (42) at its proximal end and moves with the transmission rack (42). The push rod (32) is connected to the transmission rack (42) and can move unidirectionally to the distal end under the drive of the transmission rack (42).

3. The continuous firing fixing device as described in claim 2, characterized in that, The drive assembly (4) also includes a connecting rod (43), which is swung within the handle (1) via a pivot (53); The transmission rack (42) and the push rod (32) are both connected to the connecting rod (43). The connecting rod (43) is configured to swing under the drive of the transmission rack (42) and drive the push rod (32) to move through the swinging action. The movement speed of the push rod (32) is slower than the movement speed of the firing rod (33).

4. The continuous firing fixing device as described in claim 3, characterized in that, The drive assembly (4) also includes a connecting frame (30), through which the connecting rod (43) drives the push rod (32) to move; The connecting rod (43) is provided with a first opening (430) and a second opening (431). The transmission rack (42) is provided with a first pin (420) that can be rotatably and movablely inserted into the first opening (430). The connecting frame (30) is provided with a second pin (300) that can be rotatably and movablely inserted into the second opening (431). The distance between the first pin (420) and the rotating shaft (53) is greater than the distance between the second pin (300) and the rotating shaft (53).

5. The continuous firing fixing device as described in claim 4, characterized in that, At least one guide is provided along the length of the push rod (32), and the connecting frame (30) is provided with an elastic arm. When the elastic arm moves to the far end with the connecting frame (30), the elastic arm abuts against the guide and drives the push rod (32) to move to the far end. When the elastic arm moves to the near end with the connecting frame (30), it avoids the guide by deforming relative to the connecting frame (30).

6. The continuous firing fixing device as described in claim 5, characterized in that, At least one abutting part is provided along the length direction of the push rod (32), and a connecting block (5) is provided inside the handle (1), and a locking element is provided in the connecting block (5); The locking member abuts against the abutment portion to restrict the push rod (32) from moving towards the proximal end, and the locking member avoids the abutment portion by deforming relative to the handle (1) when the push rod (32) moves towards the distal end of the sleeve (2).

7. The continuous firing fixing device as described in claim 1, characterized in that, The firing assembly (3) also includes a lever (31) that extends from the handle (1) into the sleeve (2); The proximal end of the lever (31) is connected to the drive assembly (4) and can move under the drive of the drive assembly (4). The distal end of the lever (31) is provided with a paddle (310) for guiding the implant (6) to the distal end of the cannula (2).

8. The continuous firing fixing device as described in claim 7, characterized in that, The actuating lever (31) is spaced apart from the firing lever (33) and located above the firing lever (33). The implant (6) is disposed between the actuating lever (31) and the firing lever (33). The distal end of the pusher (32) extends between the firing lever (33) and the actuating lever (31) and abuts against the implant (6).

9. The continuous firing fixing device as described in any one of claims 1 to 8, characterized in that, The handle (1) is equipped with a trigger (40), which is connected to the drive assembly (4) and is used to drive the drive assembly (4) to move.

10. The continuous firing fixing device as described in claim 9, characterized in that, The handle (1) is also provided with a limiting member (45), which has a limiting state and a separating state relative to the trigger member (40). In the limiting state, the limiting member (45) can restrict the action of the trigger member (40). In the separating state, the limiting member (45) is separated from the trigger member (40). The limiting member (45) is configured to be able to act in response to an external force and switch from the limiting state to the separating state.

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