Bending protection structure for cutting knife of endoscope anastomat

Abstract

The utility model relates to a bending protection structure for an endoscope anastomat cutting knife, which comprises protection sheets, an H-shaped sheet and a joint gasket, the protection sheets are arranged on two sides of a cutting knife pushing plate in the thickness direction, the protection sheets are connected with a shell of a percussion assembly, and the H-shaped sheet is connected to one side, far away from the cutting knife pushing plate, of the protection sheets; the swing joint comprises an upper joint and a lower joint, an upper limiting block is arranged on the upper joint, and a lower limiting block is arranged on the lower joint; the top face of the lower limiting block on one side of the cutting knife pushing plate in the thickness direction is provided with an embedding groove allowing the connector gasket to be embedded, the connector gasket is provided with a matching hole allowing the riveting column to penetrate through, and the connector gasket makes contact with the H-shaped piece. The protection sheet is a silica gel part, and the H-shaped sheet and the joint gasket are stainless steel parts. According to the technical scheme, when the side, facing the connector gasket, of the cutting knife pushing plate is bent, the cutting knife pushing plate is protected, and the possibility that the cutting knife pushing plate is broken is reduced.

Description

Technical Field

[0001] The utility model relates to the field of laparoscopic staplers, in particular to a bending protection structure for a cutting knife of a laparoscopic stapler. Background Art

[0002] Laparoscopic stapler is a commonly used instrument in laparoscopic surgery.

[0003] The laparoscopic stapler mainly includes a staple cartridge assembly, a cutting knife, a firing assembly, a sleeve part, and a steering head. The staple cartridge assembly includes a staple cartridge seat and a nail anvil seat. Titanium nails are arranged on the staple cartridge seat. The nail anvil seat is rotatably connected to the staple cartridge and forms an openable and closable jaw with the staple cartridge seat. After the staple cartridge seat and the nail anvil seat are closed, the jaws bite and press the organ tissue that needs surgical anastomosis. The shell of the staple cartridge assembly is slidably connected with a bevel, which can push the titanium nail forward. The firing assembly includes a firing handle and a driving structure. After the firing handle is pulled, the firing assembly performs a firing action. The driving mechanism drives the cutting knife and the bevel forward at the same time. The bevel pushes the titanium nail. While the cutting knife cuts the tissue, the titanium nail staples the corresponding tissue.

[0004] The doctor holds the firing handle and manipulates the nail magazine assembly to swing left and right and rotate through the swing assembly to adjust the position of the nail magazine assembly. The swing assembly includes a swing joint, one end of which is fixedly connected to the nail magazine seat and the nail support seat of the nail magazine assembly, and the other end of the swing joint is rotatably connected to the shell of the firing assembly. The swing joint is provided with a rotating shaft, and a steering hook is rotatably provided on the rotating shaft. The steering hook is provided with a rotating hole for the rotating shaft to pass through. The hook portion of the steering hook extends into the shell of the firing assembly and slides along the shell of the firing assembly under the drive of the matching driving structure.

[0005] The middle parts of the staple cartridge seat and the staple anvil seat in the width direction are both provided with an accommodation space for the cutting knife to slide through. The cutting knife includes a knife head and a push plate. The knife head of the cutting knife is located on the side of the swing joint close to the staple cartridge assembly, and the cutting knife push plate is located on the side of the swing joint close to the firing assembly and extends into the housing of the push assembly. The swing joint is provided with a clearance space for the cutting knife push plate to slide. When firing, the cutting knife push plate can pass through the clearance space of the swing joint and slide along the accommodation space of the staple cartridge seat and the accommodation space of the staple anvil seat, so that the cutting knife cuts the tissue while the staple cartridge assembly sews the tissues on both sides of the cut tissue.

[0006] The stapler assembly of the laparoscopic stapler is fired after swinging left and right, and the cutting knife swings with the swing of the stapler assembly. There is a possibility that the cutting knife push plate breaks, which not only brings additional risks to the operation, but may even threaten the patient's life safety. Utility Model Content

[0007] In order to solve the above technical problems, the present application provides a bending protection structure for a laparoscopic stapler cutting knife.

[0008] The present application provides a bending protection structure for a laparoscopic stapler cutting knife using the following technical solution:

[0009] A bending protection structure for a laparoscopic stapler cutting blade, comprising a protection sheet, an H-shaped sheet, and a joint gasket, wherein the protection sheet is arranged on both sides of a cutting blade pushing plate in a thickness direction, the protection sheet is connected to a housing of a firing assembly, and the H-shaped sheet is connected to a side of the protection sheet away from the cutting blade pushing plate;

[0010] The swing joint comprises an upper joint and a lower joint, the upper joint is provided with an upper limit block, the upper limit blocks are provided on both sides of the thickness direction of the cutting knife pushing plate, and the sides of the upper limit blocks close to each other are arc surfaces, the lower joint is provided with a lower limit block, the lower limit blocks are provided on both sides of the thickness direction of the cutting knife pushing plate, and the sides of the lower limit blocks close to each other are arc surfaces, there is a clearance space between the two lower limit blocks and between the two upper limit blocks for the cutting knife pushing plate to pass through, a riveting column is provided on the top surface of the lower limit block, a riveting hole for the riveting column to penetrate is provided on the bottom surface of the upper limit block, and the bottom surface of the upper limit block is in contact with the bottom surface of the lower limit block;

[0011] The top surface of the lower limit block on one side of the cutting knife pushing plate in the thickness direction is provided with an embedding groove for embedding the joint gasket, and the joint gasket is provided with a matching hole for the riveting column to pass through, and the joint gasket is in contact with the H-shaped sheet.

[0012] Preferably, the top surface of the joint gasket is flush with the top surface of the lower limit block, and the side of the joint gasket close to the H-shaped piece is an arc surface, and the arc surface of the joint gasket is closer to the H-shaped piece than the arc surface of the lower limit block.

[0013] Preferably, the protective sheet is made of silicone, and the H-shaped sheet and the joint gasket are both made of stainless steel.

[0014] Preferably, each of the protective sheets is provided with a clamping block at the top and the bottom, and a clamping slot for the clamping block to be clamped is provided on the shell of the firing assembly.

[0015] Preferably, the length of the card slot is greater than the length of the card block.

[0016] Preferably, a positioning member is provided on the side of the protective sheet away from each other, and the positioning member includes a positioning plate and a U-shaped plate. The positioning plate is arranged at both ends of the U-shaped plate, and the plate surface of the positioning plate is perpendicular to the plate surface of the protective sheet. The positioning plate is arranged between two vertical sections of the H-shaped plate, and two U-shaped plates are arranged, and the horizontal section of the H-shaped plate is arranged between the two U-shaped plates.

[0017] Preferably, the length of the vertical section of the H-shaped sheet close to the joint gasket is greater than the length of the vertical section of the H-shaped sheet away from the joint gasket.

[0018] Preferably, a receiving groove for the steering hook to rotate is provided on the top surface of the lower limit block on the side of the cutting knife pushing plate away from the joint gasket, and a rotating hole for the riveting column to pass through is provided on the steering hook.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. When the cutting knife push plate bends toward one side of the joint gasket, the H-shaped plate and the joint gasket support the protective plate, and cooperate with the protective plate to form a guide rail for the cutting knife push plate to bend. After the nail magazine assembly swings, when the cutting knife moves, the cutting knife push plate does not contact the arc surface of the upper limit block of the swing joint, and the cutting knife push plate does not contact the arc surface of the lower limit block. Therefore, the H-shaped plate and the joint gasket cooperate with the protective plate to protect the cutting knife push plate, reducing the possibility of the cutting knife push plate breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a bending protection structure for a laparoscopic stapler cutting knife in an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the structure of the steering hook used to illustrate the embodiment of the present application.

[0023] Figure 3 It is a structural schematic diagram used to display the positioning member in the embodiment of the present application.

[0024] Explanation of the accompanying drawings: 1. Protective sheet; 11. Block; 2. H-shaped sheet; 3. Joint gasket; 31. Matching hole; 4. Swing joint; 41. Upper joint; 411. Upper limit block; 4111. Riveting hole; 42. Lower joint; 421. Lower limit block; 4211. Riveting column; 4212. Embedded groove; 4213. Accommodating groove; 5. Cutting knife push plate; 6. Steering hook; 61. Rotating hole; 7. Shell of firing assembly; 71. Slot; 8. Positioning piece; 81. Positioning plate; 82. U-shaped plate; 9. Nail magazine assembly. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-3 This application is described in further detail.

[0026] The embodiment of the present application discloses a bending protection structure for a cutting knife of a laparoscopic stapler.

[0027] Reference Figure 1-3The bending protection structure for the cutting knife of the laparoscopic stapler includes a protection sheet 1, an H-shaped sheet 2, and a joint gasket 3. The protection sheet 1 is arranged on both sides of the cutting knife pushing plate 5 in the thickness direction. The protection sheet 1 is connected to the shell 7 of the firing assembly, and the H-shaped sheet 2 is connected to the side of the protection sheet 1 away from the cutting knife pushing plate 5.

[0028] The swing joint 4 includes an upper joint 41 and a lower joint 42. An upper limit block 411 is provided on the upper joint 41. The upper limit blocks 411 are arranged on both sides of the thickness direction of the cutting knife push plate 5, and the sides of the upper limit blocks 411 close to each other are arc surfaces. A lower limit block 421 is provided on the lower joint 42. The lower limit blocks 421 are arranged on both sides of the thickness direction of the cutting knife push plate 5, and the sides of the lower limit blocks 421 close to each other are arc surfaces. There is a clearance space between the two lower limit blocks 421 and between the two upper limit blocks 411 for the cutting knife push plate 5 to pass through. Riveted columns 4211 are symmetrically arranged on the top surface of the lower limit block 421, and riveted holes 4111 for the corresponding riveted columns 4211 to penetrate are arranged on the bottom surface of the upper limit block 411. The bottom surface of the upper limit block 411 is fitted with the bottom surface of the lower limit block 421.

[0029] A embedding groove 4212 for embedding the joint gasket 3 is provided on the top surface of the lower limit block 421 on one side of the thickness direction of the cutting knife push plate 5, and a matching hole 31 for the rivet column 4211 to pass through is provided on the joint gasket 3. The top surface of the joint gasket 3 is flush with the top surface of the lower limit block 421, and the side of the joint gasket 3 close to the H-shaped piece 2 is an arc surface. The arc surface of the joint gasket 3 is closer to the H-shaped piece 2 than the arc surface of the lower limit block 421, and the joint gasket 3 is in contact with the H-shaped piece 2.

[0030] When installing the joint gasket 3, make the rivet column 4211 pass through the matching hole 31 of the joint gasket 3, then cover the upper joint 41 on the lower joint 42, make the rivet column 4211 pass through the rivet hole 4111, and then use a rotary riveting machine to lower the rivet column 4211 and rivet it firmly, so that the joint gasket 3 and the swing joint 4 are connected as a whole.

[0031] A receiving groove 4213 for the steering hook 6 to rotate is provided on the top surface of the lower limit block 421 on the side of the cutting knife push plate 5 away from the joint gasket 3, and a rotating hole 61 for the rivet column 4211 to pass through is provided on the steering hook 6. The hook part of the steering hook 6 extends into the shell 7 of the firing assembly and slides along the shell 7 of the firing assembly under the drive of the matching driving structure. It is very common in the prior art that the steering hook 6 drives the nail magazine assembly to swing, so it will not be repeated.

[0032] The protective sheet 1 is made of silicone, and the H-shaped sheet 2 and the joint gasket 3 are both made of stainless steel.

[0033] Each protective sheet 1 is provided with a card block 11 at the top and bottom, and a card slot 71 for the card block 11 to be fixed is provided on the shell 7 of the firing assembly. The length of the card slot 71 is greater than the length of the card block 11, which is convenient for the installation of the protective sheet 1.

[0034] A positioning member 8 is provided on the side of the protective sheet 1 that is away from each other. The positioning member 8 includes a positioning plate 81 and a U-shaped plate 82. The positioning plate 81 is provided at both ends of the U-shaped plate 82. The plate surface of the positioning plate 81 is perpendicular to the plate surface of the protective sheet 1. The positioning plate 81 is provided between the two vertical sections of the H-shaped plate. Two U-shaped plates 82 are provided, and the horizontal section of the H-shaped plate is provided between the two U-shaped plates 82. Therefore, the positioning member 8 on the protective sheet 1 provides positioning for the installation of the H-shaped sheet 2, and the H-shaped sheet 2 is clamped on the protective sheet 1 through the positioning member 8.

[0035] The length of the horizontal section of the H-shaped plate is slightly greater than the distance between the two positioning plates 81 on their sides away from each other, thereby providing the H-shaped plate 2 with an adaptive sliding space.

[0036] The side of the H-shaped plate 2 close to the joint gasket 3 is extended so that the length of the vertical section of the H-shaped plate 2 close to the joint gasket 3 is greater than the length of the vertical section of the H-shaped plate 2 away from the joint gasket 3, thereby increasing the supporting force of the H-shaped plate 2 close to the swing joint 4.

[0037] When the cutting knife push plate 5 bends toward one side of the joint gasket 3, the H-shaped plate 2 and the joint gasket 3 support the protective plate 1, and cooperate with the protective plate 1 to form a guide rail for the cutting knife push plate 5 to bend. After the nail magazine assembly swings, when the cutting knife moves, the cutting knife push plate 5 does not contact the arc surface of the upper limit block 411 of the swing joint 4, and the cutting knife push plate 5 does not contact the arc surface of the lower limit block 421. Therefore, the H-shaped plate 2 and the joint gasket 3 cooperate with the protective plate 1 to protect the cutting knife push plate 5, thereby reducing the possibility of the cutting knife push plate 5 breaking.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bending protection structure for a laparoscopic stapler cutting knife, characterized in that: It comprises a protective sheet (1), an H-shaped sheet (2), and a joint gasket (3), wherein the protective sheet (1) is arranged on both sides of a cutting blade pushing plate (5) in a thickness direction, the protective sheet (1) is connected to a housing (7) of a firing assembly, and the H-shaped sheet (2) is connected to a side of the protective sheet (1) away from the cutting blade pushing plate (5); The swing joint (4) comprises an upper joint (41) and a lower joint (42); the upper joint (41) is provided with an upper limit block (411); the upper limit blocks (411) are provided on both sides of the cutting blade pushing plate (5) in the thickness direction, and the sides of the upper limit blocks (411) close to each other are arc surfaces; the lower joint (42) is provided with a lower limit block (421); the lower limit blocks (421) are provided on both sides of the cutting blade pushing plate (5) in the thickness direction, and the lower limit blocks (421) are provided on both sides of the cutting blade pushing plate (5) in the thickness direction. ) are provided with a cambered surface on one side close to each other, and there is a clearance space between the two lower limit blocks (421) and between the two upper limit blocks (411) for the cutting knife to push the plate (5) to pass through, a riveting column (4211) is provided on the top surface of the lower limit block (421), and a riveting hole (4111) for the riveting column (4211) to pass through is provided on the bottom surface of the upper limit block (411), and the bottom surface of the upper limit block (411) is in contact with the bottom surface of the lower limit block (421); A groove (4212) for embedding a joint gasket (3) is provided on the top surface of a lower limit block (421) on one side of the cutting knife pushing plate (5) in the thickness direction, and a matching hole (31) for a riveting column (4211) to pass through is provided on the joint gasket (3), and the joint gasket (3) is in contact with the H-shaped plate (2).

2. The bending protection structure for a laparoscopic stapler cutting knife according to claim 1, characterized in that: The top surface of the joint gasket (3) is flush with the top surface of the lower limit block (421); the side of the joint gasket (3) close to the H-shaped plate (2) is an arc surface; the arc surface of the joint gasket (3) is closer to the H-shaped plate (2) than the arc surface of the lower limit block (421).

3. The bending protection structure for a laparoscopic stapler cutting knife according to claim 1, characterized in that: The protective sheet (1) is made of silicone, and the H-shaped sheet (2) and the joint gasket (3) are both made of stainless steel.

4. The bending protection structure for a laparoscopic stapler cutting knife according to claim 1, characterized in that: A clamping block (11) is provided at the top and bottom of each protective sheet (1), and a clamping slot (71) for clamping the clamping block (11) is provided on the shell (7) of the firing assembly.

5. The bending protection structure for a laparoscopic stapler cutting knife according to claim 4, characterized in that: The length of the card slot (71) is greater than the length of the card block (11).

6. The bending protection structure for a laparoscopic stapler cutting knife according to claim 1, characterized in that: A positioning member (8) is provided on a surface of the protection sheet (1) that is away from each other, and the positioning member (8) comprises a positioning plate (81) and a U-shaped plate (82). The positioning plate (81) is provided at both ends of the U-shaped plate (82), and the plate surface of the positioning plate (81) is perpendicular to the plate surface of the protection sheet (1). The positioning plate (81) is provided between two vertical sections of the H-shaped plate, and two U-shaped plates (82) are provided, and the horizontal section of the H-shaped plate is provided between the two U-shaped plates (82).

7. The bending protection structure for a laparoscopic stapler cutting knife according to claim 1, characterized in that: The length of the vertical section of the H-shaped sheet (2) on the side close to the joint gasket (3) is greater than the length of the vertical section of the H-shaped sheet (2) on the side away from the joint gasket (3).

8. The bending protection structure for a laparoscopic stapler cutting knife according to claim 1, characterized in that: A receiving groove (4213) for the steering hook (6) to rotate is provided on the top surface of the lower limit block (421) on the side of the cutting knife pushing plate (5) away from the joint gasket (3), and a rotating hole (61) for the riveting column (4211) to pass through is provided on the steering hook (6).

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