A rivet crimping device for a laparoscopic stapler assembly

Abstract

This utility model discloses a rivet pressing device for a laparoscopic stapler assembly, comprising an upper fixing structure, a lower fixing structure, a base, and a pressing mechanism. The upper fixing structure includes a mounting positioning post, an upper fixing plate, and an upper panel. The pressing mechanism is axially symmetrical about the laparoscopic stapler assembly, including a symmetrically arranged shovel, a slider, a rivet insert, and a slider guide block. The base has the slider guide block embedded in it, and the slider is slidably disposed within the slider guide block. A rivet insert is embedded in the middle of the front end of the slider, and the back has an upwardly and backwardly inclined surface. The shovel is located behind the slider, and its bottom has a pushing inclined surface that cooperates with the inclined surface on the back of the slider. This device has a reasonable structure, facilitating stable pressing of rivets in the laparoscopic stapler assembly.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a rivet crimping device for laparoscopic anastomosis device assemblies. Background Technology

[0002] Disposable linear cutting staplers for laparoscopy are widely used in minimally invasive laparoscopic surgery. During the manufacturing and assembly process, multiple components are typically connected using rivets. Traditional assembly methods rely heavily on manual labor, with workers using hammers to press the rivets into the components. This method not only suffers from low assembly efficiency and poor quality consistency but also carries significant operational risks, such as uneven force application leading to product deformation or even tool slippage causing personal injury.

[0003] Therefore, there is an urgent need for a new tooling structure that is structurally stable, has a controlled crimping stroke, precise positioning, and is suitable for the crimping of rivets in laparoscopic stapler components. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a rivet pressing device with reasonable structure, accurate positioning, controlled pressing process, and applicable to laparoscopic anastomosis device components, so as to achieve stable pressing of rivets and improve assembly accuracy and safety.

[0005] A rivet crimping device for a laparoscopic stapler assembly includes an upper fixing structure, a lower fixing structure, a base for accommodating the laparoscopic stapler assembly, and a crimping mechanism that cooperates with a press. The upper fixing structure includes a mounting positioning post, an upper fixing plate, and an upper panel. The crimping mechanism is axially symmetrical about the laparoscopic stapler assembly and includes a symmetrically arranged shovel, a slider, a rivet insert, and a slider guide block. The base has a slider guide block embedded in it, and the slider is slidably disposed within the slider guide block. A rivet insert is embedded in the middle of the front end of the slider, and an upward and backward inclined surface is provided on its back. The shovel is located behind the slider and has a pushing inclined surface at its bottom that cooperates with the inclined surface on the back of the slider to achieve the pushing action of the slider in cooperation with the press.

[0006] Furthermore, the pressing mechanism also includes a spring and a limiting pin. The slider is provided with a mounting hole to accommodate the spring. One end of the spring is fixed in the mounting hole, and the other end extends out of the slider and toward the endoscopic anastomosis device assembly area on the base. The limiting pin is fixedly disposed on the base and located behind the slider guide block. Its height relative to the slider is set to be higher than the bottom of the slider, so that the slider can be blocked by the limiting pin during the sliding process along the guide block.

[0007] Furthermore, the upper fixing structure includes a mounting positioning post, an upper fixing plate, and an upper panel. The mounting positioning post is vertically installed above the upper fixing plate. The upper fixing plate is fixed above the upper panel by internal hexagon screws. The upper panel is provided with a through hole for accommodating the shovel. The shovel passes through the through hole and maintains guidance and stability through the through hole during its up and down movement.

[0008] Furthermore, a limiting post is fixed to the base by bolts. When the rivet is pressed against the endoscopic anastomosis device assembly, the top of the limiting post contacts the lower surface of the upper panel, thereby limiting the end position of the pressing stroke in the structural design.

[0009] Furthermore, the base is provided with a guide post and a guide sleeve. The guide post is vertically arranged and passes through the guide sleeve. The guide sleeve is fixedly installed on the base. The guide post is located on one side of the shovel and maintains a close proximity relationship with the shovel to provide guidance and positioning during its up and down movement.

[0010] Furthermore, the lower fixing structure includes a lower fixing plate and a T-shaped fixing block. The lower fixing plate is disposed below the base and connected to the base by screws. The T-shaped fixing block is fixedly connected to the lower fixing plate by hexagonal socket screws. Its structure is adapted to the working platform of the crimping equipment to realize the fixed installation of the crimping device during use.

[0011] The beneficial effects of this utility model are:

[0012] This invention, by setting up an upper fixing structure and a lower fixing structure, enables the entire pressing device to be stably installed on the press and achieves precise docking with the press, facilitating standardized assembly operations.

[0013] This invention, by setting up a symmetrical structure for the shovel, slider, rivet insert, and slider guide block, ensures uniform force distribution during the rivet pressing process. The reasonable structural arrangement helps to improve the stability and consistency of the pressing action.

[0014] This invention achieves linear pushing of the slider by setting an inclined surface between the back of the slider and the bottom of the shovel, thereby simplifying the transmission structure and facilitating stable force transmission.

[0015] This invention improves the precise guidance and position control capabilities of the structure by setting mounting holes on the slider and installing springs, and by setting limit pins, effectively limiting the slider's stroke range and achieving automatic reset. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2This is an exploded structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the crimping mechanism of this utility model;

[0019] Figure 4 This utility model Figure 3 A magnified view of part I in the image;

[0020] In the diagram: 1-Installation positioning post; 2-Upper fixing plate; 3-Upper panel; 4-Shovel; 5-Guide post; 6-Limiting post; 7-Slider; 8-Guide sleeve; 9-Limiting pin; 10-Base; 11-Pressure pin insert; 12-Slider guide block; 13-Spring; 14-Lower fixing plate; 15-T-shaped fixing block; 16-Laparoscopic stapler assembly. Detailed Implementation

[0021] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] like Figure 1 As shown, this utility model provides a rivet crimping device for a laparoscopic stapler assembly, including an upper fixing structure, a lower fixing structure, a base 10 for accommodating the laparoscopic stapler assembly 16, and a crimping mechanism mounted on the base 10. This device is used in conjunction with an external press to achieve precise crimping of the rivet parts of the laparoscopic stapler assembly 16.

[0023] like Figure 2 As shown, the upper fixing structure includes a mounting positioning post 1, an upper fixing plate 2, and an upper panel 3. The mounting positioning post 1 is vertically fixed above the upper fixing plate 2 for connection and positioning with the press. The upper fixing plate 2 is connected and fixed to the upper panel 3 by hexagon socket screws. The lower fixing structure includes a lower fixing plate 14 and a T-shaped fixing block 15. The lower fixing plate 14 is located below the base 10 and connected to the base by screws. The T-shaped fixing block 15 is installed on the lower part of the lower fixing plate 14 and fixedly connected by hexagon socket screws for positioning in conjunction with the T-slot on the press table.

[0024] The base 10 is the main structure for accommodating the laparoscopic stapler assembly 16 and mounting the crimping mechanism. A limit post 6 is fixed to the base 10 by bolts. The limit post 6 is vertically upward and located in the middle of the slider area. When the crimping pin 11 presses the rivet into the laparoscopic stapler assembly 16, the lower surface of the upper panel 3 contacts the top of the limit post 6, thereby limiting the crimping stroke and preventing the shovel 4 from pressing down further.

[0025] like Figure 3 , Figure 4As shown, the crimping mechanism has an axisymmetric structure, symmetrically arranged around the laparoscopic stapler assembly 16. It mainly includes symmetrically arranged components such as a shovel 4, a slider 7, a stapling insert 11, a slider guide block 12, a spring 13, a guide post 5, and a guide sleeve 8. The slider guide block 12 is embedded in the base 10, and the slider 7 is slidably disposed within the slider guide block 12. The stapling insert 11 is embedded in the center of the front end of the slider, and the back has an upward-sloping and backward-inclined surface.

[0026] The shovel 4 is inserted into the through hole provided in the upper panel 3, and its bottom is provided with a pushing inclined surface that cooperates with the inclined surface on the back of the slider. When the shovel 4 is driven downward by the press, its bottom inclined surface contacts the inclined surface on the back of the slider 7, thereby driving the slider to slide forward along the guide block, realizing the pressing action of the rivet pin 11 on the rivet.

[0027] The slider 7 has an internal mounting hole for mounting a spring 13. One end of the spring is fixed inside the mounting hole, and the other end extends out of the rear of the slider and towards the area of ​​the endoscopic stapler assembly 16. When the slider is pushed forward by the shovel 4, the spring 13 is compressed; when the shovel 4 returns to its original position, the spring 13 releases its elasticity, pushing the slider 7 back to its initial position along the slide groove of the slider guide block 12. To prevent the slider 7 from overtraveling, a limiting pin 9 is provided at the rear of the base 10. The limiting pin 9 is fixedly installed behind the slider guide block 12, and its height is higher than the bottom of the slider. When the slider is reset to its tail end by the spring 13, its tail end will be blocked by the limiting pin 9, thus limiting the stroke.

[0028] In addition, to improve the guiding accuracy of the shovel 4, the pressing mechanism also includes a guide post 5 and a guide sleeve 8. The guide post 5 is vertically inserted into the guide sleeve 8, which is fixed to the base 10. The guide post 5 is located on the outside of the shovel 4 and is used to guide and position its up and down movement to ensure smooth alignment during the pressing process.

[0029] Specific workflow:

[0030] (1) During the crimping process, the press drives the fixed structure to move downwards, and the shovel 4 presses down vertically under the guidance of the mounting positioning post 1 and the guide post 5. The pushing slope at the bottom of the shovel 4 contacts the inclined slope on the back of the slider 7, causing the slider 7 to slide forward along the guide groove of the slider guide block 12. The pressing pin 11 at the front end of the slider 7 then moves forward, pressing the rivet located at the connection part of the laparoscopic stapler assembly 16.

[0031] (2) As the slider moves forward, its internal spring 13 is compressed and stores energy. When the rivet insert 11 completes the crimping action of the rivet, the lower surface of the upper panel 3 connected to the shovel 4 comes into contact with the top of the limit post 6, thereby structurally limiting the end point of the shovel's downward stroke and preventing overpressure.

[0032] (3) Subsequently, the press rises, the shovel 4 returns to its original position, and the slider 7 slides backward to its initial position under the elastic force of the spring 13. Its tail contacts the limiting pin 9 on the base 10 to form the limit at the end of the stroke, thus completing a complete pressing cycle.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A rivet crimping device for a laparoscopic stapler assembly, comprising an upper fixed structure, a lower fixed structure, a base accommodating the laparoscopic stapler assembly, and a crimping mechanism cooperating with a press machine, characterized in that: The upper fixing structure includes a mounting positioning post, an upper fixing plate, and an upper panel; the pressing mechanism is an axisymmetric structure about the endoscopic stapler assembly, including a symmetrically arranged shovel, slider, pressure pin, and slider guide block. The base is embedded with the slider guide block, and the slider is slidably disposed in the slider guide block. A pressure pin is embedded in the middle of the front end of the slider, and the back is provided with an upward and backward inclined surface. The shovel is located on the rear side of the slider, and the bottom is provided with a pushing inclined surface that cooperates with the inclined surface on the back of the slider.

2. The rivet crimping device for a laparoscopic stapler assembly according to claim 1, characterized in that: The pressing mechanism also includes a spring and a limiting pin. The slider is provided with a mounting hole to accommodate the spring. One end of the spring is fixed in the mounting hole, and the other end extends out of the slider and toward the endoscopic anastomosis device assembly area on the base. The limiting pin is fixedly set on the base and is located behind the slider guide block and is higher than the bottom of the slider.

3. The rivet crimping device for a laparoscopic stapler assembly according to claim 1, characterized in that: The upper fixing structure includes a mounting positioning post, an upper fixing plate, and an upper panel. The mounting positioning post is vertically installed above the upper fixing plate. The upper fixing plate is fixed above the upper panel by internal hexagon screws. The upper panel has a through hole for accommodating the shovel, and the shovel passes through the through hole.

4. The rivet crimping device for a laparoscopic stapler assembly according to claim 1, characterized in that: A limiting post is fixed to the base by bolts. When the rivet is pressed against the endoscopic anastomosis device assembly, the top of the limiting post contacts the lower surface of the upper panel.

5. A rivet crimping device for a laparoscopic stapler assembly according to claim 1, characterized in that: The base is provided with a guide post and a guide sleeve. The guide post is vertically arranged and passes through the guide sleeve. The guide sleeve is fixedly installed on the base. The guide post is located on one side of the shovel and is used to guide and position the shovel's up and down movement.

6. A rivet crimping device for a laparoscopic stapler assembly according to claim 1, characterized in that: The lower fixing structure includes a lower fixing plate and a T-shaped fixing block. The lower fixing plate is disposed below the base and is connected to the base by screws. The T-shaped fixing block is fixedly connected to the lower fixing plate by hexagonal socket screws.

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