An anastomosis device

Abstract

The utility model belongs to the technical field of medical equipment, especially, relate to a kind of anastomat firing assembly.The utility model to the situation that cutting knife is located on the nail bin in prior art needs to ensure that nail bin is installed in place and nail bin is intact so that the advancing assembly of anastomat can correctly advance cutting knife to push slider to press and suture nail condition, provide a kind of anastomat firing assembly, it is unlocked by the cutting knife of correctly installed nail bin tail portion on the nail bin support above by being provided with the safety block with two safety unlocking areas, so that advancing assembly can smoothly push cutting knife, when advancing assembly is withdrawn, it can be unlocked safety block from the nail bin support below by advancing assembly to realize secondary unlocking, so that the stable firing and reply function are reached.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, and in particular relates to a stapler firing assembly. Background Technology

[0002] Linear staplers are primarily used in minimally invasive surgery. In existing staplers, the cutting blade that performs the tissue cutting function is not replaceable. With increased use, the blade gradually wears down, leading to a decrease in sharpness and thus reducing surgical quality. Therefore, some products place the cutting blade on the staple cartridge for easy replacement. However, ensuring that the staple cartridge is properly installed and intact so that the stapler's advance assembly can correctly advance the cutting blade and thus the slider to press the staples together is a problem that needs to be solved.

[0003] For example, a Chinese utility model patent discloses a detachable stapler assembly and stapler application number: 202222928507.6. The staple cartridge body is provided with steps. The slide block cutting blade assembly is slidably mounted on the staple cartridge body. The slide block cutting blade assembly includes a slide block, a torsion spring, and a cutting blade. The slide block has a cutting blade mounting hole, and the cutting blade is rotatably mounted on the cutting blade mounting hole at a certain angle. The torsion spring is fixedly connected to both the slide block and the cutting blade. The cutting blade is located within a stepped groove in the staple cartridge body. This design solves the technical problem in the prior art where the cutting blade of a laparoscopic stapler is inconvenient to replace, thus affecting cutting efficiency.

[0004] While this invention makes the cutting blade easy to replace by placing it on the staple cartridge body, it still does not solve the problem of ensuring that the staple cartridge is installed in place and intact so that the stapler's propulsion assembly can correctly advance the cutting blade. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems by providing a stapler firing assembly.

[0006] This utility model includes a propulsion assembly, a staple cartridge assembly, a cutting blade assembly, and a staple cartridge bracket for mounting the staple cartridge assembly. The propulsion assembly includes a fixedly connected push rod and push rod head. The staple cartridge assembly includes a staple cartridge, a slider, and a support frame. The slider slides on the support frame, and the staple cartridge bracket houses the staple cartridge assembly. The push rod head slides vertically through the support frame and the staple cartridge bracket, pushing the slider to push out the staples from the staple cartridge by pushing the cutting blade assembly. The support frame is spring-loaded onto the staple cartridge bracket via a snap-fit ​​and a groove. The support frame provides an initial fixing force to the slider and the cutting blade assembly through elastic locking or other means, and then slides on the support frame after being pushed by a certain force. The staple cartridge bracket is longer than the staple cartridge assembly and has a safety compartment on its side near the propulsion assembly. It also includes a safety structure mounted on the staple cartridge bracket. The safety structure includes a first unlocking area and a second unlocking area. The safety structure and the safety compartment interfere with the propulsion assembly's movement in the direction of movement from the propulsion assembly to the staple cartridge assembly, blocking the propulsion assembly's movement. The interference is eliminated on the side near the staple cartridge assembly by the cutting blade assembly squeezing the first unlocking area or the cutting blade assembly squeezing the second unlocking area. The first and second unlocking areas are located on the upper and lower sides of the staple cartridge bracket.

[0007] Preferably, the insurance structure is an insurance block that is slidably fixed to the insurance compartment, the bottom of the insurance compartment is provided with a limiting groove, and one end of the insurance block is inserted into the limiting groove.

[0008] Preferably, it also includes a safety block pin, the safety block being generally cross-shaped with a centrally located sliding groove, and the safety chamber having mounting holes on both the left and right sides. The safety block pin passes through the mounting holes and the sliding groove to achieve a slidable fixation between the safety chamber and the safety block.

[0009] Preferably, the first unlocking area is an unlocking arc set at the lower left corner of the cross-shaped safety block, and the cutting blade assembly includes a pusher tail. The pusher tail squeezes the unlocking arc, causing the safety block to move upward and leave the limiting groove under the interference of the safety block pin.

[0010] Preferably, the push rod head includes a push seat that extends through the staple cartridge bracket, and the safety block includes a stop seat that extends through the limiting groove. The side of the stop seat away from the staple cartridge assembly and the side of the push seat near the staple cartridge assembly are vertical surfaces.

[0011] Preferably, the second unlocking area is a first reset slope on the side of the blocking seat near the staple cartridge assembly, and the push seat has a second reset slope on the side away from the staple cartridge assembly.

[0012] Preferably, it also includes a reset device, which presses the safety block to maintain one end inserted into the limiting groove.

[0013] Preferably, the safety block includes a pressure groove located at the upper right of the cross shape, and the reset device is an elastic pressure plate fixed to the safety chamber. The elastic pressure plate presses the safety block downward through the pressure groove to maintain its embedded state in the limiting groove.

[0014] Preferably, the limiting groove is rectangular in shape.

[0015] Preferably, the end of the pusher is a curved surface.

[0016] Compared with existing technologies, the advantages of this utility model are: This invention features a safety mechanism on the staple cartridge bracket. The corresponding cutting blade assembly at the tail of the staple cartridge requires unlocking to allow the propulsion component to advance, push the cutting blade, and then drive the slider to insert the staples. This design prevents accidental firing even when the staple cartridge assembly is not installed or is already in use. The propulsion component of this invention has a built-in unlocking mechanism that, in conjunction with the corresponding part of the safety mechanism, allows the propulsion component to return without relying on the cutting blade assembly's unlocking structure. The cutting blade remains near the safety mechanism, facilitating staple cartridge disassembly and making it immediately clear whether the staple cartridge has been used. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the staple cartridge support; Figure 4 for Figure 3 Enlarged view of a specific area; Figure 5 This is a schematic diagram of the cutting blade assembly; Figure 6 This is a schematic diagram of the putter head; Figure 7 This is a schematic diagram of a safety block; Figure 8 This is a schematic diagram of the reset device; Figure 9 This is a diagram showing the situation without the staple cartridge installed. Figure 10 This is a diagram illustrating the correct installation of the staple cartridge. Figure 11 This diagram illustrates the push rod head resetting after the firing is completed following proper installation of the bolt magazine. Figure 12 A schematic diagram of the stapler with the stapler cartridge installed; In the diagram: 1. Propulsion assembly, 11. Push rod, 12. Push rod head, 121. Push seat, 1211. Second reset ramp, 211. 2. Pin cartridge assembly, 21. Slider, 22. Support frame, 23. Cutting blade assembly, 3. Push tail, 31. Pin cartridge bracket, 4. Safety chamber, 41. Limiting groove, 411. Mounting hole, 412. Safety structure, 5. Safety block, 51. Unlocking arc, 511. Blocking seat, 512. First reset ramp, 5121. Pressure groove, 513. Sliding groove, 514. Safety block pin, 6. Reset device, 7. Elastic pressure plate, 71. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] This utility model relates to a stapler firing assembly, such as... Figure 1-8 As shown in Figures 9 and 12, the device includes a propulsion assembly 1, a staple cartridge assembly 2, a cutting blade assembly 3, and a staple cartridge bracket 4 for mounting the staple cartridge assembly 2. The propulsion assembly 1 includes a push rod 11 and a push rod head 12 fixedly connected. The staple cartridge assembly 2 includes a staple cartridge 21, a slider 22, and a support frame 23. The slider 22 slides on the support frame 23, and the staple cartridge bracket 4 houses the staple cartridge assembly 2. The push rod head 12 slides vertically through the support frame 23 and the staple cartridge bracket 4, pushing the slider 22 to push the cutting blade assembly 3 to eject the staples from the staple cartridge 21. The slider 22 and the cutting blade assembly 3 are elastically deformed and fixed to the support frame. The staple cartridge support 4 is longer than the staple cartridge assembly 2 and has a safety chamber 41 on the side near the propulsion assembly 1. It also includes a safety structure 5 installed on the staple cartridge support 4. The safety structure 5 includes a first unlocking area and a second unlocking area. The safety structure 5 and the safety chamber 41 interfere with each other in the direction of movement of the propulsion assembly 1 to the staple cartridge assembly 2, blocking the movement of the propulsion assembly 1. The interference is eliminated by the cutting blade assembly 3 squeezing the first unlocking area or the cutting blade assembly 3 squeezing the second unlocking area on the side near the staple cartridge assembly 2. The first unlocking area and the second unlocking area are located on the upper and lower sides of the staple cartridge support 4.

[0020] In use, the support frame 23 is installed on the staple cartridge bracket via snaps and grooves. The slider 22 and the cutting blade assembly 3 are initially fixed by the support frame 23 through elastic compression or other means. Before installation, it is as shown in 9 and 12; after correct installation, it is as shown... Figure 1 , 10 As shown, the safety structure 5 is initially located between the cutting blade assembly 3 and the propulsion assembly 1; the cutting blade assembly 3, installed at the tail of the support frame 23, abuts against the safety structure 5 located on the staple cartridge bracket 4, thereby unlocking the safety structure 5, so that the propulsion assembly can smoothly advance the cutting blade assembly 3 and drive the push slider 22 to squeeze the staples.

[0021] like Figure 7 , 9As shown, the safety structure 5 is a safety block 51 that is slidably fixed to the safety chamber 41. The bottom of the safety chamber 41 is provided with a limiting groove 411. One end of the safety block 51 is inserted into the limiting groove 411. When the safety block 51 is not initially squeezed, it interferes with the limiting groove 411.

[0022] Specifically, the present invention also includes a safety block pin 6. The safety block 51 is generally in the shape of a cross and has a sliding groove 514 in the center. The safety chamber 41 has mounting holes 412 on both the left and right sides. The safety block pin 6 passes through the mounting holes 412 and the sliding groove 514 to achieve a slidable fixation between the safety chamber 41 and the safety block 51.

[0023] Furthermore, such as Figure 7 As shown, the first unlocking area is the unlocking arc 511 set at the lower left corner of the cross-shaped safety block 51. The cutting blade assembly 3 includes a push tail 31. The push tail 31 squeezes the unlocking arc 511 and, under the interference of the safety block pin 6, causes the safety block 51 to slide upward and leave the limiting groove 411 to complete the unlocking.

[0024] Preferred, such as Figure 6 , 7 As shown in Figure 9, the pusher head 12 includes a pusher seat 121 that extends through the staple cartridge bracket 4, and the safety block 51 includes a blocking seat 512 that extends through the limiting groove 411. The blocking seat 512 on the side away from the staple cartridge assembly 2 and the pusher seat 121 on the side close to the staple cartridge assembly 2 are vertical surfaces.

[0025] Furthermore, the second unlocking area is a first reset slope 5121 on the side of the blocking seat 512 near the staple cartridge assembly 2, and a second reset slope 1211 on the side of the push seat 121 away from the staple cartridge assembly 2.

[0026] Preferred, such as Figure 8 , 9 As shown, it also includes a reset device 7, which presses the safety block 51 to maintain one end inserted into the limiting groove 411.

[0027] Furthermore, such as Figure 7 As shown, the safety block 51 includes a pressure groove 513 located on the upper right of the cross shape, and the reset device 7 is an elastic pressure plate 71 fixed to the safety chamber 41. The elastic pressure plate 71 presses the safety block 51 downward through the pressure groove 513 to maintain the state of being embedded in the limiting groove 411.

[0028] Preferably, the limiting groove 411 is rectangular in shape, which can facilitate interference with the straight surface of the safety block 51 at one end.

[0029] Preferably, the end of the push tail 31 is curved, which, in conjunction with the unlocking arc 511, enables more stable pushing.

[0030] The working principle of this embodiment is as follows: When the staple cartridge is not installed, the specific structure is as follows: Figure 9 As shown, the safety block 51 is in a vertical cross shape. The elastic pressure plate 71 presses against the pressure groove 513 on the upper right of the cross structure, so that the blocking seat 512 of the safety block 51 can be stably inserted into the limiting groove 411 to block the advancement of the propulsion assembly 1. As shown, when the safety block 51 is not squeezed and slides upward, it only blocks the advancement of the propulsion assembly 1 below the staple cartridge bracket 4.

[0031] The support frame 23 is mounted on the staple cartridge bracket via snaps and grooves. The slider 22 and the cutting blade assembly 3 are initially fixed by the support frame 23 through elastic compression or other means. The entire assembly cooperates with the stapler as follows: Figure 12 After showing, as shown Figure 10 As shown, the arc-shaped tail of the pusher 31 of the cutter assembly 3, installed behind the staple cartridge assembly 2, pushes the unlocking arc 511 of the safety block 51. Due to the presence of the safety block pin 6, the lateral movement is limited, and the vertical movement causes the safety block 51 to move upward and disengage from the limiting groove 411. In this way, the pusher 11 can smoothly push the pusher head 12 past the position of the safety block 51 and push the cutter assembly 3 forward in the middle position. The cutter assembly 3 then pushes the slider 22 forward. After the cutter assembly 3 leaves contact with the safety block 51, the pusher assembly 1 passes the safety structure 5. At this time, the elastic pressure plate 71 presses the safety block 51 back into the limiting groove 411 and locks it in the locked state.

[0032] After pushing all the way down to complete the cut, push rod 11 is pulled back to push rod head 12, leaving the cutting blade assembly 3 at the head of support frame 23, i.e., away from the safety chamber 41. After the second reset slope 1211 at the rear end of push seat 121 at the bottom of push rod head 12 contacts the first reset slope 5121 of safety block 51, it begins to push safety block 51 out of limit groove 411. Figure 11 As shown, after the propulsion component 1 passes over the safety structure 5, the reset device restores the safety structure 5 to its locked state, and the propulsion component 1 returns to its initial position and waits for the next firing.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as propulsion assembly 1, push rod 11, push rod head 12, push seat 121, second reset ramp 1211, staple cartridge assembly 2, staple cartridge 21, slider 22, support frame 23, cutting blade assembly 3, push tail 31, staple cartridge bracket 4, safety chamber 41, limiting groove 411, mounting hole 412, safety structure 5, safety block 51, unlocking arc 511, blocking seat 512, first reset ramp 5121, pressure groove 513, sliding groove 514, safety block pin 6, reset device 7, and elastic pressure plate 71, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A stapler firing assembly, comprising an advance assembly (1), a staple cartridge assembly (2), a cutting blade assembly (3), and a staple cartridge bracket (4) for mounting the staple cartridge assembly (2); the advance assembly (1) includes a push rod (11) and a push rod head (12) fixedly connected; the staple cartridge assembly (2) includes a staple cartridge (21), a slider (22), and a support frame (23); the slider (22) slides on the support frame (23); the staple cartridge bracket (4) accommodates the staple cartridge assembly (2); the push rod head (12) slides vertically through the support frame (23) and the staple cartridge bracket (4) to push the slider (22) out of the staple cartridge (21) by pushing the cutting blade assembly (3); characterized in that: The slider (22) and the cutting blade assembly (3) are elastically deformed and fixed on the support frame (23) and slide on the support frame (23); the length of the staple cartridge bracket (4) is greater than that of the staple cartridge assembly (2) and a safety chamber (41) is provided on the side of it near the propulsion assembly (1); it also includes a safety structure (5) installed on the staple cartridge bracket (4), the safety structure (5) includes a first unlocking area and a second unlocking area; the safety structure (5) and the safety chamber (41) interfere with each other in the direction of movement of the propulsion assembly (1) towards the staple cartridge assembly (2) to block the movement of the propulsion assembly (1) and eliminate the interference by squeezing the first unlocking area or the second unlocking area by the cutting blade assembly (3) on the side (2) near the staple cartridge assembly, the first unlocking area and the second unlocking area are located on the upper and lower sides of the staple cartridge bracket (4).

2. The anastomosis device firing assembly as described in claim 1, characterized in that: The safety structure (5) is a safety block (51) that is slidably connected to the safety chamber (41). The bottom of the safety chamber (41) is provided with a limiting groove (411), and one end of the safety block (51) is inserted into the limiting groove (411).

3. The anastomosis device firing assembly as described in claim 2, characterized in that: It also includes a safety block pin (6), the safety block (51) is in the shape of a cross and has a sliding groove (514) in the center, the safety chamber (41) has mounting holes (412) on both the left and right sides, and the safety block pin (6) passes through the mounting holes (412) and the sliding groove (514) to achieve a sliding fixation between the safety chamber (41) and the safety block (51).

4. The anastomosis device firing assembly as described in claim 2, characterized in that: The first unlocking area is an unlocking arc (511) set at the lower left corner of the cross-shaped safety block (51). The cutting blade assembly (3) includes a push tail (31). The push tail (31) squeezes the unlocking arc (511) to make the safety block (51) move upward away from the limiting groove (411).

5. The anastomosis device firing assembly as described in claim 4, characterized in that: The pusher head (12) includes a pusher seat (121) that passes through the staple cartridge bracket (4), and the safety block (51) includes a stop seat (512) that passes through the limiting groove (411). The side of the stop seat (512) away from the staple cartridge assembly (2) and the side of the pusher seat (121) close to the staple cartridge assembly (2) are vertical surfaces.

6. The anastomosis device firing assembly as described in claim 5, characterized in that: The second unlocking area is the first reset slope (5121) of the blocking seat (512) on the side close to the staple cartridge assembly (2), and the push seat (121) has a second reset slope (1211) on the side away from the staple cartridge assembly (2).

7. The anastomosis device firing assembly as described in claim 4, characterized in that: It also includes a reset device (7), which presses the safety block (51) to maintain one end inserted into the limiting groove (411).

8. The anastomosis device firing assembly as described in claim 7, characterized in that: The safety block (51) includes a pressure groove (513) located on the upper right of the cross shape. The reset device (7) is an elastic pressure plate (71) fixed to the safety chamber (41). The elastic pressure plate (71) presses the safety block (51) downward through the pressure groove (513) to maintain the embedded limit groove (411).

9. The anastomosis device firing assembly as described in claim 6, characterized in that: The limiting groove (411) is rectangular in shape.

10. The anastomosis device firing assembly as described in claim 4, characterized in that: The end of the pusher (31) is a curved surface.

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