Anastomat with stable connecting structure

Abstract

The anastomat with the stable connection structure comprises a shell, a rack assembly and a driving mechanism, the shell comprises a handle, and an installation space is formed in the shell; the rack assembly is installed in the installation space and comprises a rack capable of moving in the length direction of the rack, and a blocking wall is formed at one end of the rack; the driving mechanism comprises a trigger, a safety button, a propeller assembly and a safety lock assembly, the safety lock assembly comprises a safety lock piece, the safety lock piece can abut against the blocking wall along with rotation of the trigger so as to prevent the trigger from being away from the handle, and the safety button is always connected to the safety lock assembly. And the safety lock plate can be driven to be far away from the retaining wall. The safety button and the trigger of the anastomat are always in a connected state, so that the connection operation of the safety button and the trigger when the trigger is pressed is avoided, and the problems of connection failure or structure failure and even damage of structural components caused by forced connection are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a stapler with a stable connection structure. Background Technology

[0002] A stapler is a medical device used to replace manual suturing. Its main working principle is to use titanium staples to sever or anastomose tissue, similar to a stapler. Common staplers in current technology usually have a confirmation mechanism; a safety button must be pressed after the stapler clamps the target site to initiate firing. A connecting mechanism is located between the safety button and the stapler trigger. This connection only engages when the trigger is pressed, closing the front end of the stapler. However, in actual operation, this connection may fail to engage correctly, affecting the normal treatment process.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a stapler with a stable connection structure to solve the connection problem between the safety button and the trigger.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides a stapler, including a housing, a rack assembly, and a drive mechanism. The housing includes a handle and has an internal mounting space. The rack assembly is mounted within the mounting space and includes a rack capable of moving along its own length, with a retaining wall formed at one end. The drive mechanism includes a trigger, a safety button, a pusher assembly, and a safety lock assembly. The trigger is pivotally connected to the housing and can move closer to or further away from the handle. The safety button is mounted on the housing. The pusher assembly is connected to the trigger and can contact and drive the rack to move as the trigger rotates. The safety lock assembly includes a safety locking plate that can abut against the retaining wall as the trigger rotates to prevent the trigger from moving away from the handle. The safety button is always connected to the safety lock assembly and can drive the safety locking plate away from the retaining wall.

[0006] In one or more embodiments of this utility model, the safety button is provided with a groove, and the safety lock assembly includes a U-shaped bracket connected to the safety lock plate. The U-shaped bracket includes a connecting arm, mounting arms protruding from both ends of the connecting arm, and a guide plate connected to the connecting arm. The mounting arm is connected to the trigger, and the guide plate is disposed on the other side of the mounting arm and protrudes from the connecting arm in a direction perpendicular to the extension of the mounting arm. The guide plate is always inserted into the groove when the trigger is rotated.

[0007] In one or more embodiments of this utility model, the safety button includes a cylindrical rod and a driving part disposed in the middle of the rod. The groove is recessed in the driving part. The outer shell is provided with a mounting hole. The end of the rod is inserted into the mounting hole and extends to the outside of the outer shell. When the safety button is rotated, the bottom wall of the groove squeezes and drives the guide plate to move.

[0008] In one or more embodiments of this utility model, the bottom surface of the groove and the contact surface between the guide plate and the bottom surface of the groove are mutually cooperating arc-shaped surfaces.

[0009] In one or more embodiments of this utility model, the housing is provided with two blocking portions for limiting the rotation range of the safety button, and the driving portion is located between the two blocking portions.

[0010] In one or more embodiments of this utility model, the safety lock assembly further includes a lock plate bracket and a limiting rod. The two ends of the limiting rod are respectively connected to the mounting arm. The trigger is provided with a first mounting groove. The lock plate bracket is disposed in the first mounting groove and can move within the first mounting groove. The safety lock plate is connected to one end of the lock plate bracket and protrudes from the first mounting groove. The lock plate bracket is provided with a protrusion. The limiting rod is provided with a baffle that abuts against the protrusion. The mounting arm is pivotally connected to the trigger. When the safety button drives the U-shaped bracket to rotate, the baffle squeezes the protrusion and drives the lock plate bracket to move away from the opening of the first mounting groove.

[0011] In one or more embodiments of the present invention, a bracket spring is provided in the first mounting groove, and the bracket spring is pressed between the bottom of the first mounting groove and the locking plate bracket.

[0012] In one or more embodiments of this utility model, the locking plate bracket is provided with a second mounting groove, the safety locking plate is rotatably connected to the opening of the second mounting groove, and a locking plate spring is pressed between the safety locking plate and the bottom of the second mounting groove.

[0013] In one or more embodiments of this utility model, a push rod is further provided between the locking spring and the safety locking plate, and the push rod includes an arc-shaped contact surface that contacts the safety locking plate.

[0014] In one or more embodiments of the present invention, a trigger torsion spring for driving the trigger away from the handle is further included. The two ends of the trigger torsion spring abut against the trigger and the housing, respectively. The pusher assembly includes a pusher and a pusher torsion spring. The pusher is pivotally connected to the trigger and is provided with a push plate that can engage the rack. One end of the pusher torsion spring abuts against the pusher, and the other end abuts against the end of the trigger torsion spring connected to the housing.

[0015] Compared with the prior art, the safety button and trigger of the anastomosis device in this utility model are always connected, thus avoiding the connection operation when the trigger is pressed, thereby avoiding connection failure or structural failure, or even damage to structural components due to forced connection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an anatomical diagram of the stapler in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram showing the trigger away from the handle in one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the trigger near the handle in one embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional view of the anastomosis device in one embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the U-shaped bracket and the limiting rod in one embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of a safety button in one embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of a limiting rod in one embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the safety lock plate being installed on the lock plate bracket in one embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the combination of the safety button, U-shaped bracket, limiting rod, locking plate bracket and safety locking plate in one embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram showing the positions of the bracket spring, locking plate bracket, locking plate spring, push rod, and safety locking plate in one embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of a thruster assembly in one embodiment of the present invention;

[0028] Figure 12 for Figure 1 Enlarged view of a portion of the image;

[0029] Figure 13 This is a schematic diagram of the trigger in one embodiment of the present invention.

[0030] Explanation of key figure labels:

[0031] 100-Anastomosis device, 10-Housing shell, 11-Handle, 12-Mounting hole, 13-Blocking part, 20-Rack assembly, 21-Rack, 211-Baffle, 30-Drive mechanism, 31-Trigger, 311-Mounting part, 312-First mounting slot, 32-Safety button, 321-Lever, 322-Drive part, 323-Groove, 33-Thruster assembly, 331-Thruster, 3311-Push plate, 3312-Through hole, 3 32-Thrust spring for the pusher; 34-Safety lock assembly; 341-Safety lock plate; 342-U-shaped bracket; 3421-Connecting arm; 3422-Mounting arm; 3423-Guide plate; 343-Lock plate bracket; 3431-Protrusion; 3432-Second mounting groove; 344-Limit rod; 3441-Block; 345-Bracket spring; 346-Lock plate spring; 347-Push rod; 3471-Arc-shaped contact surface; 348-Trigger torsion spring. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0033] like Figure 1-13As shown, the anastomosis device 100 in one embodiment of this utility model includes a housing 10, a rack assembly 20, and a drive mechanism 30. The housing 10 includes a handle 11 for the operator to hold. The rack assembly 20 is installed within the housing 10 and includes a rack 21 that is movable along its length within the housing 10, with a stop 211 formed at one end of the rack 21. The drive mechanism 30 includes a trigger 31, a safety button 32, a pusher assembly 33, and a safety lock assembly 34. The trigger 31 is pivotally connected to the housing 10 and can move closer to or further away from the handle 11. The pusher assembly 33 is connected to the trigger 31 and can contact and drive the rack 21 to move outward from the housing 10 as the trigger 31 rotates. The safety lock assembly 34 is connected to the trigger 31 and includes a safety lock plate 341. When the trigger 31 is rotated to a position close to the handle 11, the safety lock plate 341 can move to and abut against the stop 211, thereby preventing the trigger 31 from moving away from the handle 11, thus entering the firing confirmation state. The safety button 32 is mounted on the housing 11 and is always connected to the safety lock assembly 34. When the safety button 32 is pressed, it can drive the safety lock assembly 34 to move, thereby causing the safety lock plate 341 to move away from the stop 211. At this time, the trigger 31 is no longer obstructed and can rotate away from the handle 11. At this time, the stapler 100 enters the firing state. Repeatedly pressing the trigger 31 can perform the firing operation.

[0034] In this embodiment, the safety button 32 and the safety lock assembly 34 are always in a connected state, without any steps to enter or disconnect the connection, thereby avoiding the situation where the structure cannot be properly connected or even fails, as well as the situation where forced operation causes damage to structural components, resulting in high safety and stability.

[0035] Specifically, a groove 323 is provided on the safety button 32, and the safety lock assembly 34 includes a U-shaped bracket 342 connected to the safety lock plate 341. The U-shaped bracket 342 includes a connecting arm 3421, mounting arms 3422 protruding from both ends of the connecting arm 3421, and a guide plate 3423 protruding from the connecting arm 3421. It is pivotally connected to the trigger 31 through the two mounting arms 3422. The guide plate 3423 is provided on the other side of the mounting arm 3422 and is a tongue-shaped structure protruding from the connecting arm 3421 in a direction perpendicular to the extension of the mounting arm 3422. The guide plate 3423 is always inserted into the groove 323, so that the safety button 32 and the safety lock assembly 34 are always in a connected state.

[0036] like Figure 6As shown, the safety button 32 includes a cylindrical rod 321 and a drive portion 322 located in the middle of the rod 321. A groove 323 is recessed into the drive portion 322. A corresponding mounting hole 12 is provided in the housing 10. The end of the rod 321 is inserted into the mounting hole 12 and extends out of the housing 10 for operation by medical personnel. When the safety button 32 is rotated, the bottom of the groove 323 contacts and presses the guide plate 3423, causing it to move, thereby disengaging the safety locking plate 341 from the stop wall 211.

[0037] Furthermore, to facilitate operation by medical staff, operation knobs (not shown in the figure) can be installed at both ends of the rod 321 to provide operation positions for medical staff and avoid slippage.

[0038] Preferably, since both the safety button 32 and the U-shaped bracket 342 move by rotation, the bottom surface of the groove 323 and the contact position between the guide plate 3423 and the bottom surface of the groove 323 are set as mutually fitting arc surfaces, thereby optimizing the squeezing drive process of the contact between the two and avoiding the influence of force on the rotation operation of the safety button 32 and the U-shaped bracket 342.

[0039] In one embodiment, a blocking part 13 is provided on the outer casing 10, which is located around the mounting hole 12. The driving part 322 is limited between the blocking parts 13, and its rotation range is restricted, thus limiting the rotation range of the safety button 32 and preventing excessive rotation.

[0040] like Figure 5 and 8 As shown, the safety lock assembly 34 also includes a lock plate bracket 343 and a limiting rod 344. Two opposing mounting portions 311 protrude from the trigger 31, and two mounting arms 3422 are disposed on the housing of the mounting portions 311. The limiting rod 344 is disposed between the two mounting portions 311, and its two ends are connected to the mounting wall 3422 by pins. The safety lock plate 341 is pivotally connected to one end of the lock plate bracket 343. At the same time, a first mounting groove 312 is provided on the trigger 31, and the lock plate bracket 343 is movably disposed in the first mounting groove 312, with the safety lock plate 341 protruding from the first mounting groove 312. A protrusion 3431 is provided on the locking plate bracket 343, and a corresponding stop surface 3441 is provided on the limiting rod 344. When the safety button 32 drives the U-shaped bracket 342 to rotate, the limiting rod 344 rotates with it, and the stop surface 3441 contacts and squeezes the protrusion 3431, thereby driving the locking plate bracket 343 to move away from the opening of the first mounting groove 312, so that the safety locking plate 341 moves away from the baffle 211 and disengages from the baffle 211.

[0041] Preferably, a bracket spring 345 is provided in the first mounting groove 312, which presses against the bottom of the first mounting groove 312 and the locking plate bracket 343. When the locking plate bracket 343 is driven downward by the limiting rod 344, the bracket spring 345 deforms and stores energy. Subsequently, after losing the driving force of the limiting rod 344, it releases the stored energy and resets, thereby pushing the locking plate bracket 343 to move upward.

[0042] like Figure 4 and 10 As shown, a second mounting groove 3432 is provided at the end of the locking plate bracket 343 away from the bracket spring 345, and the safety locking plate 341 is pivotally connected to the opening of the second mounting groove 3432. Similarly, a locking plate spring 346 is provided in the second mounting groove 3432, which is pressed between the bottom of the second mounting groove 3432 and the safety locking plate 341 to ensure the posture of the safety locking plate 341.

[0043] Preferably, a push rod 347 is provided between the locking spring 346 and the safety locking plate 341. One end of the push rod is inserted into the locking spring 346, and the other end, which contacts the safety locking plate 341, has a larger diameter and forms an arc-shaped contact surface 3471. The safety locking plate 341 abuts against the arc-shaped contact surface 3471, and can receive a force from the arc-shaped contact surface 3471 in different postures, thereby restoring it to a vertical state and avoiding the situation where it cannot properly abut against the barrier 211 due to an incorrect posture after moving to the position of the barrier 211.

[0044] like Figure 1 As shown, a trigger torsion spring 348 is also provided in the mounting space inside the housing 10 to provide a reset function for the trigger 31. One end of the spring abuts against the trigger 31, and the other end abuts against the inner wall of the housing 10. When the trigger 31 is turned toward the handle 11, the trigger torsion spring 348 deforms and stores energy. When the force acting on the trigger 31 disappears, the trigger torsion spring 348 releases the stored energy and resets, thereby pushing the trigger 31 to move away from the handle 11.

[0045] The propeller assembly 33 includes a propeller 331 and a propeller torsion spring 332. The propeller 331 is pivotally connected to the trigger 31 via a pin, and one end of the propeller 3311 is provided with a push plate 3311 that can engage with the rack 21. One end of the propeller torsion spring 332 abuts against the propeller 331, and the other end abuts against the connection end of the trigger torsion spring 348 abutting against the inner wall of the housing 10. Since the end of the trigger torsion spring 348 abutting against the inner wall of the housing 10 is always in a relatively stationary state with the housing 10, it can provide a fixed position for the propeller torsion spring 332. When the trigger 31 is turned, the propeller 331 moves accordingly, and the push plate 3311 moves on the rack 21. The propeller torsion spring 332 is used to drive the push plate 3311 to always face the rack 21 and to smoothly enter the gap between adjacent teeth of the rack 21, thereby smoothly firing. A through hole 3312 is also provided on the thruster 331, and the locking plate bracket 343 extends toward the rack 21 after passing through the through hole 3312.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stapler with a stable connection structure, characterized in that, include: The housing includes a handle, and the interior of the housing has an installation space. A rack assembly, installed within the installation space, includes a rack capable of moving along its own length, with a baffle formed at one end of the rack; A drive mechanism includes a trigger, a safety button, a pusher assembly, and a safety lock assembly. The trigger is pivotally connected to the housing and can move closer to or further away from the handle. The safety button is mounted on the housing. The pusher assembly is connected to the trigger and can contact and drive the rack to move as the trigger rotates. The safety lock assembly includes a safety lock plate that can abut against a stop wall as the trigger rotates to prevent the trigger from moving away from the handle. The safety button is always connected to the safety lock assembly and can drive the safety lock plate away from the stop wall. The safety button has a groove. The safety lock assembly includes a U-shaped bracket connected to the safety lock plate. The U-shaped bracket includes a connecting arm, mounting arms protruding from both ends of the connecting arm, and a guide plate connected to the connecting arm. The mounting arm is connected to the trigger. The guide plate is located on the other side of the mounting arm and protrudes from the connecting arm in a direction perpendicular to the extension of the mounting arm. The guide plate is always inserted into the groove when the trigger rotates.

2. The stapler with a stable connection structure according to claim 1, characterized in that, The safety button includes a cylindrical rod and a drive part disposed in the middle of the rod. The groove is recessed in the drive part. The housing is provided with a mounting hole. The end of the rod is inserted into the mounting hole and extends to the outside of the housing. When the safety button is rotated, the bottom wall of the groove squeezes and drives the guide plate to move.

3. The stapler with a stable connection structure according to claim 2, characterized in that, The bottom surface of the groove and the contact surface between the guide plate and the bottom surface of the groove are mutually cooperating arc-shaped surfaces.

4. The stapler with a stable connection structure according to claim 2, characterized in that, The housing is provided with two blocking parts for limiting the rotation range of the safety button, and the drive part is located between the two blocking parts.

5. The stapler with a stable connection structure according to claim 1, characterized in that, The safety lock assembly further includes a locking plate bracket and a limiting rod. The two ends of the limiting rod are respectively connected to the mounting arm. The trigger is provided with a first mounting groove. The locking plate bracket is disposed in the first mounting groove and can move within the first mounting groove. The safety locking plate is connected to one end of the locking plate bracket and protrudes from the first mounting groove. The locking plate bracket is provided with a protrusion. The limiting rod is provided with a baffle that abuts against the protrusion. The mounting arm is pivotally connected to the trigger. When the safety button drives the U-shaped bracket to rotate, the baffle squeezes the protrusion and drives the locking plate bracket to move away from the opening of the first mounting groove.

6. The stapler with a stable connection structure according to claim 5, characterized in that, A bracket spring is provided in the first mounting groove, and the bracket spring is pressed between the bottom of the first mounting groove and the locking plate bracket.

7. The stapler with a stable connection structure according to claim 6, characterized in that, The locking plate bracket is provided with a second mounting groove, the safety locking plate is rotatably connected to the opening of the second mounting groove, and a locking plate spring is pressed between the safety locking plate and the bottom of the second mounting groove.

8. The stapler with a stable connection structure according to claim 7, characterized in that, A push rod is also provided between the locking spring and the safety locking plate, and the push rod includes an arc-shaped contact surface that contacts the safety locking plate.

9. The stapler with a stable connection structure according to claim 1, characterized in that, It also includes a trigger torsion spring for driving the trigger away from the handle, the two ends of the trigger torsion spring abutting against the trigger and the housing respectively, the pusher assembly including a pusher and a pusher torsion spring, the pusher being pivotally connected to the trigger and provided with a push plate capable of engaging the rack, one end of the pusher torsion spring abutting against the pusher, and the other end abutting against the end of the trigger torsion spring connected to the housing.

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