Laparoscopic stapler

Abstract

This invention relates to laparoscopic anastomosis devices. To address the problems of complex structures and the inability of positioning blocks to quickly engage the rack to prevent it from retracting when the movable handle rotates, this invention provides a laparoscopic anastomosis device comprising a housing. A movable handle and a rack pusher block are installed within the housing. The rack pusher block is hinged to the top of the movable handle. The movable handle also has a hinge portion for hinged to one end of a connecting block. The other end of the connecting block is hinged to a positioning strip, and a positioning block is fitted onto the positioning strip. An opening groove is formed on the rear section of the positioning strip, and the front end of the opening groove has an oblique opening perpendicular to the length direction of the positioning strip and inclined towards the front end of the positioning strip. A retractable positioning structure is provided in the positioning block. The positioning structure and the opening groove are aligned on the same straight line and cooperate with the opening groove to lock or release the rack. This invention features a simple structure, rapid rack retraction prevention, and good retraction prevention effect.

Description

Technical Field

[0001] This invention relates to laparoscopic anastomosis devices, and more particularly to a laparoscopic anastomosis device. Background Technology

[0002] Existing laparoscopic anastomosis devices enable the movable handle to drive the rack pusher block to advance the rack during the forward movement, thereby achieving the surgical outcome. They can also disengage the positioning block from the rack at appropriate times, allowing the rack to move forward without restriction. However, when the movable handle is rotated back, the positioning block cannot quickly lock the rack, resulting in a lag effect. This leads to a visible regression in surgical outcomes, reduced surgical efficiency, and a lack of operator safety during the operation.

[0003] In summary, existing laparoscopic anastomotic devices have the problem that the positioning block cannot quickly lock the rack to prevent it from retracting when the movable handle is rotated. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problem that the positioning block cannot quickly lock the rack to prevent the rack from retracting when the movable handle of the existing laparoscopic anastomosis device is rotated, and to provide a laparoscopic anastomosis device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a laparoscopic anastomosis device, including a housing, in which a movable handle and a rack push block are installed, the rack push block is hinged to the top of the movable handle, the movable handle is also provided with a hinge part for hinged to one end of a connecting block, the other end of the connecting block is hinged to a positioning strip, and a positioning block is sleeved on the positioning strip;

[0006] An opening groove is provided on the rear section of the positioning strip, and the front end of the opening groove has an oblique opening that is perpendicular to the length direction of the positioning strip and inclined towards the front end of the positioning strip.

[0007] The positioning block is provided with a retractable positioning structure. The positioning structure and the opening slot are arranged on the same straight line and cooperate with the opening slot to lock or release the rack.

[0008] Furthermore, the positioning strip is a square strip that is thinner at the front and thicker at the back. The diameter of the front and middle sections of the positioning strip is smaller than the diameter of the rear section. There is a transitional inclined surface between the middle and rear sections of the positioning strip. When the positioning strip is pushed forward, the transitional inclined surface presses the positioning block downward, causing the positioning block to separate from the rack.

[0009] Furthermore, the diameters of the front and middle sections of the positioning strip are equal.

[0010] Furthermore, the positioning structure includes a positioning pin and a spring. The positioning pin is perpendicular to the positioning strip and has a limiting boss. The spring is sleeved on the positioning pin, with one end of the spring abutting against the rear end of the limiting boss and the other end of the spring abutting against the inner wall of the positioning block mounting position.

[0011] Furthermore, the positioning structure includes a mounting shaft, a rotating block, and a torsion spring. The mounting shaft and the positioning strip form a cross shape. The torsion spring and the rotating block are sleeved on the mounting shaft. The torsion spring is installed in the rotating block. One end of the torsion spring is engaged in a notch on the positioning block, and the other end of the torsion spring is engaged in a slot on the rotating block.

[0012] Furthermore, the end hinge of the positioning strip has an arc-shaped stepped surface, which mates with the connecting block.

[0013] Furthermore, the lower part of the rack pusher block has a first inclined surface, and the side of the connecting block has a protrusion with a second inclined surface that cooperates with the inclined surface of the first inclined surface.

[0014] Furthermore, the protrusion is a prismatic or columnar hexahedron.

[0015] The beneficial effects of the present invention are that the laparoscopic anastomosis device of the present invention replaces the existing numerous limiting blocks and sliders with a positioning strip that is narrow at the front and wide at the back or thin at the front and thick at the back. An opening groove is opened on the rear side of the rear section of the positioning strip, and a positioning pin that cooperates with the opening groove is installed on the positioning block to lock it. When the movable handle is rotated, the positioning block can quickly lock the rack and immediately prevent the rack from retracting.

[0016] In summary, the present invention has the characteristics of simple structure, rapid rack-and-pinion check, and good check effect. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure after removing the outer shell.

[0020] Figure 3 This is a schematic diagram of the structure of the movable handle of the present invention.

[0021] Figure 4 This is a schematic diagram of the positioning strip of the present invention.

[0022] Figure 5 This is a schematic diagram of the positioning strip and positioning block under the first structure of the present invention.

[0023] Figure 6 yes Figure 5 A structural diagram from another angle.

[0024] Figure 7 This is a schematic diagram of the positioning block under the first structure of the present invention.

[0025] Figure 8 and Figure 9 This is a schematic diagram of the positioning strip and positioning block under the second structure of the present invention.

[0026] Figure 10 A schematic diagram of the positioning block under the second structure of the present invention.

[0027] Figure 11 yes Figure 10 A sectional view.

[0028] In the diagram: 1. Movable handle, 2. Rack pusher block, 3. Hinge, 4. Connecting block, 5. Positioning strip, 6. Positioning block, 7. Rack, 8. Transition inclined surface, 9. Opening slot, 10. Angled opening, 11. Positioning pin, 12. Limiting boss, 13. Spring, 14. Spring hole, 15. Protrusion, 16. Housing, 17. Rotating block, 18. Torsion spring, 19. Notch, 20. Slot, 21. Stepped surface, 22. Mounting shaft. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0030] like Figures 1 to 11 The laparoscopic anastomosis device shown includes a housing 16, in which a movable handle 1 and a rack pusher block 2 are installed. The rack pusher block 2 is hinged to the top of the movable handle 1 via a pin. A hinge part 3 is also machined on the movable handle 1. The hinge part 3 is located on the upper section of the movable handle 1 and the lower side of the rack pusher block 2. A connecting block 4 is hinged to the hinge part 3. The connecting block 4 is hinged to the positioning strip 5. A positioning block 6 is fitted on the outer side of the positioning strip 5. The positioning strip 5 can move back and forth in the positioning block 6.

[0031] The positioning strip 5 is a square strip that is thinner at the front and thicker at the back. The diameter of the front and middle sections of the positioning strip 5 is smaller than the diameter of the rear section of the positioning strip 5. The diameters of the front and middle sections of the positioning strip 5 are equal. There is a transition inclined surface 8 between the middle and rear sections of the positioning strip 5. An opening groove 9 is provided on the rear section of the positioning strip 5. The front end of the opening groove 9 is machined with an oblique opening 10 that is perpendicular to the length direction of the positioning strip 5 and inclined towards the front end of the positioning strip 5.

[0032] The positioning block 6 also contains a positioning structure, which has two types of structures.

[0033] The first structure includes a positioning pin 11 and a spring 13. The positioning pin 11 is perpendicular to the positioning strip 6 and is on the same straight line as the opening groove 9. A limiting boss 12 is machined on the pin body of the positioning pin 11. The spring 13 is sleeved on the positioning pin 11. One end of the spring 13 abuts against the rear end of the limiting boss 12, and the other end of the spring 13 abuts against the inner wall of the mounting position of the positioning block 6. A spring hole 14 for placing the lifting spring is machined at the bottom of the positioning block 6.

[0034] The second structure includes a mounting shaft 22, a rotating block 17, and a torsion spring 18. The mounting shaft 22 and the positioning strip 5 are in a cross shape. The torsion spring 18 and the rotating block 17 are sleeved on the mounting shaft 22. The torsion spring 18 is installed in the rotating block 17. One end of the torsion spring 18 is engaged in the notch 19 on the positioning block, and the other end of the torsion spring 18 is engaged in the slot 20 of the rotating block. The bottom of the positioning block 6 is machined with a spring hole 14 for placing the lifting spring.

[0035] To prevent the positioning strip 5 from excessively retracting and jamming, the lower part of the rack push block 2 has a first inclined surface, and the side of the connecting block 4 has a protrusion 15. The protrusion 15 has a second inclined surface that cooperates with the inclined surface of the first inclined surface. The protrusion 15 is a columnar hexahedron.

[0036] To reduce the swaying of the positioning strip 5 during movement, the end of the positioning strip 5 is hinged with an arc-shaped stepped surface 21. The arc-shaped stepped surface 21 provides certain support for the connecting block 4 to reduce the swaying of the positioning strip 5 during movement.

[0037] Example 1

[0038] When the active handle 1 moves counterclockwise:

[0039] S1: Positioning bar 5 moves to the left, and the transition inclined surface 8 contacts the positioning pin 11. The positioning pin 11 applies a downward force to the positioning block 6, and the positioning block 6 presses down on the lifting spring, separating the positioning block 6 from the rack 7. At the same time as the positioning bar 5 is pushed to the left, the rack pushing block 2 moves upward to contact the rack 7 and pushes the rack 7 to the left.

[0040] S2: When the positioning bar 5 moves to the left and to the rear section, the positioning pin 11 is squeezed into the opening groove 9 under the reaction force of the lifting spring. At the same time, the positioning bar 5 rebounds quickly and rises to lock the rack 7 under the reaction force of the lifting spring.

[0041] When the active handle 1 is rotated clockwise:

[0042] S1: Positioning bar 5 moves to the right, and positioning pin 11 slides out of opening groove 9 by squeezing spring 13 through the oblique opening 10 at the front end (left side) of opening groove 9; while positioning bar 5 moves to the right, rack push block 2 moves downward away from rack 7.

[0043] Example 2

[0044] S1: Positioning bar 5 moves to the left, the transition inclined surface 8 contacts the rotating block 17, and the rotating block 17 applies a downward force to positioning block 6. Positioning block 6 presses down on the lifting spring, and positioning block 6 separates from rack 7. At the same time as positioning bar 5 is pushed to the left, rack push block 2 moves upward to contact rack 7 and pushes rack 7 to the left.

[0045] S2: When the positioning bar 5 moves to the left and to the rear section, the rotating block 17 is squeezed into the opening groove 9 under the reaction force of the lifting spring. At the same time, the positioning bar 5 rebounds and rises rapidly under the reaction force of the lifting spring to lock the rack 7.

[0046] When the active handle 1 is rotated clockwise:

[0047] S1: Positioning bar 5 moves to the right, and rotating block 17 follows the oblique opening 10 at the front end (left side) of opening groove 9. Rotating block 17 twists torsion spring 18 to make room to slide out of opening groove 9. At the same time as positioning bar 5 moves to the right, rack pushes block 2 to move downward away from rack 7.

[0048] The above description is only a specific embodiment of the present invention. Various examples and illustrations do not constitute a limitation on the substantive content of the present invention. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the specification without departing from the substance and scope of the invention.

Claims

1. A laparoscopic anastomosis device, comprising a housing, characterized in that: The housing is equipped with a movable handle and a rack pusher block. The rack pusher block is hinged to the top of the movable handle. The movable handle is also provided with a hinge part for hinged to one end of the connecting block. The other end of the connecting block is hinged to the positioning strip. A positioning block is sleeved on the positioning strip. An opening groove is provided on the rear section of the positioning strip, and the front end of the opening groove has an oblique opening that is perpendicular to the length direction of the positioning strip and inclined towards the front end of the positioning strip. The positioning block is provided with a retractable positioning structure. The positioning structure and the opening slot are arranged on the same straight line and cooperate with the opening slot to lock or release the rack. The positioning strip is a square strip that is thinner at the front and thicker at the back. The diameter of the front and middle sections of the positioning strip is smaller than the diameter of the rear section. There is a transition inclined surface between the middle and rear sections of the positioning strip. When the positioning strip is pushed forward, the transition inclined surface presses the positioning block downward, causing the positioning block to separate from the rack. The positioning structure includes a positioning pin and a spring. The positioning pin is perpendicular to the positioning strip and has a limiting boss. The spring is sleeved on the positioning pin, with one end of the spring abutting against the rear end of the limiting boss and the other end of the spring abutting against the inner wall of the positioning block mounting position. The positioning structure may include: a mounting shaft, a rotating block, and a torsion spring. The mounting shaft and the positioning strip are in a cross shape. The torsion spring and the rotating block are sleeved on the mounting shaft. The torsion spring is installed in the rotating block. One end of the torsion spring is engaged in a notch on the positioning block, and the other end of the torsion spring is engaged in a slot on the rotating block.

2. The laparoscopic anastomosis device as described in claim 1, characterized in that: The diameters of the front and middle sections of the positioning strip are equal.

3. The laparoscopic anastomosis device as described in claim 1, characterized in that: The end hinge of the positioning strip has an arc-shaped stepped surface, which mates with the connecting block.

4. The laparoscopic stapler as described in claim 1, characterized in that: The lower part of the rack pusher block has a first inclined surface, and the side of the connecting block has a protrusion with a second inclined surface that cooperates with the inclined surface of the first inclined surface.

5. The laparoscopic anastomosis device as described in claim 4, characterized in that: The protrusion is a prismatic or columnar hexahedron.

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