Endoscope anastomat

Abstract

The utility model provides an endoscope anastomat which comprises a rod body, a nail bin seat rotationally connected with the far end of the rod body and a nail bin detachably connected with the nail bin seat, buckles protruding outwards are formed on the left side face and the right side face of the nail bin, positioning holes capable of being connected with the buckles in a clamped mode are formed in the nail bin seat, and the nail bin seat is provided with a positioning hole. The nail bin seat is provided with a positioning hole, the positioning hole is a through hole penetrating through the inner surface and the outer surface of the nail bin seat, an elastic piece is fixedly arranged on the far end face of the rod body, when the nail bin is installed on the nail bin seat, the buckle is located in the positioning hole, and the elastic piece is in a compressed state and abuts against the near end face of the nail bin; when the buckle is pressed inwards, the nail bin deforms inwards, the buckle is separated from the positioning hole, and the nail bin moves towards the far end under the action of the elastic force of the elastic piece. The nail bin is more time-saving and labor-saving to mount and dismount, medical staff can conveniently replace the nail bin in an operation, the operation efficiency is improved, and the operation time is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of staplers, and in particular relates to a laparoscope stapler. Background Art

[0002] Laparoscopic staplers are mainly used for the severance, resection and / or establishment of anastomosis of organs and tissues in the body during laparoscopic surgery. Multiple staple cartridges are used in one operation, which need to be disassembled and assembled back and forth. In the past, staple cartridges and staple cartridge seats usually adopted an interference fit and a structure that was pressed in from above. The process of disassembling and replacing staple cartridges was laborious and time-consuming, causing a great waste of time in the operation.

[0003] In order to overcome this problem, researchers have improved the connection structure between the stapler and the stapler seat to facilitate the disassembly and assembly of the stapler. For example, CN219048668U discloses a stapler stapler assembly that is easy to disassemble, which is provided with an L-shaped snap-in groove on the side of the stapler seat, and a mounting bar is slidably installed in the cavity of the stapler head and extends out of the stapler, and a snap-in block that engages with the snap-in groove is fixedly provided on the side of the mounting bar facing away from the stapler. A U-shaped groove is provided on the top surface of the stapler head, and an elastic sheet that can be pressed down is formed in the U-shaped groove, and the elastic sheet cooperates with the mounting bar. When disassembling the stapler assembly of this patent, the user needs to press the top of the elastic sheet so that the elastic sheet presses down to drive the mounting bar to move to the right, and the snap-in block moves to the right and enters the right part of the snap-in groove, and then the user lifts the stapler head upward to separate the stapler from the stapler seat.

[0004] Although this structure greatly simplifies the disassembly and assembly of the staple cartridge, it still requires the user to perform two steps, namely, first pressing down and then lifting up. Therefore, it is still necessary to develop a laparoscopic stapler with a more convenient disassembly and assembly of the staple cartridge. Utility Model Content

[0005] The utility model aims to provide a laparoscope stapler capable of replacing a staple cartridge more simply and conveniently.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The present utility model provides a laparoscopic stapler, which includes a shaft body, a cartridge holder rotatably connected to the distal end of the shaft body, and a cartridge detachably connected to the cartridge holder. The left and right side surfaces of the cartridge are formed with outwardly protruding buckles, and the cartridge holder is formed with positioning holes that can be engaged with the buckles. The positioning holes are through holes penetrating the inner and outer surfaces of the cartridge holder. An elastic member is fixedly arranged on the distal end surface of the shaft body. When the cartridge is installed on the cartridge holder, the buckle is located in the positioning hole, and the elastic member is in a compressed state and abuts against the proximal end surface of the cartridge. When the buckle is pressed inward, the cartridge deforms inward, the buckle disengages from the positioning hole, and the cartridge moves distally under the elastic force of the elastic member.

[0008] According to some specific embodiments, there are two buckles, which are symmetrically arranged on the left and right side surfaces of the cartridge.

[0009] According to some specific embodiments, the distal end surface of the buckle is perpendicular to the side surface of the cartridge, and the proximal end surface of the buckle is inclined outward from the proximal end to the distal end.

[0010] Furthermore, the outer end surface of the buckle is a plane and is parallel to the side surface of the cartridge.

[0011] According to some specific embodiments, the positioning holes are opened on the side surface and the top surface of the cartridge holder.

[0012] Furthermore, when the buckle is located in the positioning hole, the buckle does not protrude from the outer side surface of the cartridge holder.

[0013] Furthermore, the positioning hole is surrounded by a lower hole wall on the side surface of the cartridge holder, an upper hole wall on the top surface of the cartridge holder, and a distal hole wall and a proximal hole wall on the side surface and the top surface of the cartridge holder. When the buckle is located in the positioning hole, the upper hole wall is located inside the outer end surface of the buckle.

[0014] Furthermore, the top surface of the cartridge holder is arc-shaped in cross-section.

[0015] According to some specific embodiments, the left and right side surfaces of the cartridge are further formed with outwardly protruding positioning bumps. The positioning bumps are located at the distal end of the buckle. The width of the positioning bump is substantially equal to the width of the buckle, and the thickness of the positioning bump is less than the thickness of the buckle. Grooves for the positioning bumps and the buckles to slide are formed on the inner surfaces of the left and right side surfaces of the cartridge holder. The width of the groove is slightly larger than the width of the positioning bump. The groove extends along the length direction of the cartridge holder and is communicated with the outside at the distal end.

[0016] According to some specific embodiments, there are two elastic members, which are symmetrically arranged left and right.

[0017] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0018] The structure of the present utility model is simpler, and the installation and disassembly operations are more time-saving and labor-saving, which is convenient for the machining and manufacturing of machinery, convenient for medical staff to replace the staple cartridge during the operation, improves the operation efficiency, and saves the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Overall structural schematic diagram of the endoscopic stapler for the specific implementation manner;

[0021] Figure 2 Partial longitudinal sectional view of the endoscopic stapler during the staple cartridge installation process;

[0022] Figure 3 Stereogram of the staple cartridge from one perspective;

[0023] Figure 4 Stereogram of the staple cartridge from another perspective;

[0024] Figure 5 Bottom view of the staple cartridge;

[0025] Figure 6 Side view of the staple cartridge;

[0026] Figure 7 Exploded view of the staple cartridge from one perspective;

[0027] Figure 8 Exploded view of the staple cartridge from another perspective;

[0028] Figure 9 Partial top view of the endoscopic stapler;

[0029] Figure 10 Partial side view of the endoscopic stapler;

[0030] Figure 11 Partial bottom view of the endoscopic stapler;

[0031] Figure 12 Partial stereogram of the endoscopic stapler (without staple cartridge installed);

[0032] Figure 13 Stereogram of the staple cartridge seat

[0033] Figure 14 Partial exploded side view of the endoscopic stapler (without the cartridge installed);

[0034] Figure 15 Partial exploded perspective view of the endoscopic stapler (without the cartridge installed);

[0035] Figure 16 Partial perspective view of the endoscopic stapler (with the cartridge installed);

[0036] Figure 17 Partial longitudinal sectional view of the endoscopic stapler (with the cartridge installed);

[0037] In the above figures: 1. Shaft body; 2. Handle assembly; 3. Cartridge seat; 4. Cartridge; 5. Anvil; 6. Snap; 7. Positioning hole; 8. Elastic member; 9. Positioning boss; 10. Groove; 61. Distal end face; 62. Proximal end face; 63. Outer end face; 71. Distal hole wall; 72. Lower hole wall; 73. Upper hole wall; 74. Proximal hole wall. Detailed implementation manners

[0038] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and the description are regarded as being exemplary in nature rather than restrictive.

[0039] In the description of the present invention, it should be understood that the distal end refers to the end of the instrument or component that is far from the operator, and the proximal end refers to the end of the instrument or component that is close to the operator; the inner and outer are positions defined based on the distance from the center of the instrument or component, where the inner is the position close to the center of the instrument or component, and the outer is the position far from the center of the instrument or component; the orientation terms such as "upper" and "lower" are described based on the state in the Figure 1 drawings, where Figure 1 above is the upper, below is the lower, the left side is the distal end, and the right side is the proximal end. The description of the above orientation terms is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, terms such as "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0041] Unless otherwise specified, the components of the present utility model can be prepared from materials commonly used in the art.

[0042] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0043] Figure 1 A laparoscopic stapler is shown, which includes a shaft body 1, a handle assembly 2, a transmission assembly, a staple cartridge seat 3 rotatably connected to the distal end of the shaft body 1, a staple cartridge 4 detachably connected to the staple cartridge seat 3, a staple anvil 5, etc. Among them, the structures and the connection relationships of the shaft body 1, the handle assembly 2, and the transmission assembly are not the focus of the present utility model, and the conventional structures in the art can be adopted.

[0044] Figures 2 to 17 The structure facilitating the replacement of the staple cartridge 4 is shown.

[0045] Specifically, as Figures 2 to 8 shown, a buckle 6 protruding outward is respectively formed on the left side surface and the right side surface of the staple cartridge 4, and the two buckles 6 are symmetrically arranged, that is, the two buckles 6 are located on the same cross-section of the staple cartridge 4, so that when disassembling the staple cartridge 4, it is convenient for the operator to press the two buckles 6 inward with the thumb and index finger respectively. As Figure 2 shown in FIGS. 8 to 15, positioning holes 7 capable of being engaged with the buckles 6 are formed on the left and right sides of the staple cartridge seat 3, and the positions of the two positioning holes 7 on the staple cartridge seat 3 are respectively arranged corresponding to the positions of the two buckles 6. The positioning holes 7 are through holes penetrating the inner and outer surfaces of the staple cartridge seat 3, so that the buckles 6 located in the positioning holes 7 are not blocked and are exposed outside for the operator to press.

[0046] As Figure 2 shown, the distal end surface 61 of the buckle 6 is perpendicular to the side surface of the staple cartridge 4, so that when the buckle 6 is located in the positioning hole 7, the distal end surface 61 of the buckle 6 is in contact and cooperation with the distal end hole wall 71 of the positioning hole 7, preventing the staple cartridge 4 from being separated from the staple cartridge seat 3 under the action of an elastic member 8 (see below). The proximal end surface 62 of the buckle 6 is inclined outward from the proximal end to the distal end, so as to reduce the sliding resistance between the buckle 6 and the inner side surface of the staple cartridge seat 3 when the staple cartridge 4 is inserted into the staple cartridge seat 3 along the length direction of the staple cartridge seat 3 (i.e., the distal-proximal direction). The outer end surface 63 of the buckle 6 is a plane and is parallel to the side surface of the staple cartridge 4. Here, it is not limited that the outer end surface is a strictly smooth plane, but in fact, it only needs that the outer end surface is generally a smooth or rough plane so that the operator can press it with two fingers without being pricked.

[0047] As Figure 12 shown, the positioning holes 7 are formed on the side surface and the top surface of the staple cartridge seat 3. Among them, the top surface of the staple cartridge seat 3 is arc-shaped in cross-section, that is, the outer surface of the staple cartridge seat 3 is smooth, so as to avoid damaging tissues by the staple cartridge seat 3 during the operation. Further, as Figure 16As shown, when the buckle 6 is located within the positioning hole 7, the buckle 6 does not protrude beyond the outer side surface of the cartridge seat 3, thereby avoiding damage to tissues by the buckle 6 during the surgical process. Specifically, the positioning hole 7 is formed by a lower hole wall 72 located on the side surface of the cartridge seat 3, an upper hole wall 73 located on the top surface of the cartridge seat 3, and a distal hole wall 71 and a proximal hole wall 74 located on the side surface and the top surface of the cartridge seat 3; the positioning hole 7 is generally square-shaped. When the buckle 6 is located within the positioning hole 7, the upper hole wall 73 is located inside the outer end face 63 of the buckle 6, and the lower hole wall 72 is located outside the outer end face 63 of the buckle 6, so that the positioning hole 7 provides an avoidance space at the upper position to facilitate pinching the two buckles 6 with fingers and pressing them inward.

[0048] As Figure 2 shown, a positioning boss 9 protruding outward is respectively formed on the left side surface and the right side surface of the cartridge 4, and the positioning boss 9 is located at the distal end of the buckle 6. The width of the positioning boss 9 is substantially equal to the width of the buckle 6 and the thickness of the positioning boss 9 is less than the thickness of the buckle 6, wherein the width refers to the distance between the upper and lower side surfaces, and the thickness refers to the distance between the inner and outer side surfaces. A groove 10 for the positioning boss 9 and the buckle 6 to slide is formed on the inner surface of the left side surface and the right side surface of the cartridge seat 3, and the width of the groove 10 is slightly larger than the width of the positioning boss 9, so that during the installation and disassembly process, it is convenient for the buckle 6 and the positioning boss 9 to pass through the groove 10, and when the cartridge 4 is installed on the cartridge seat 3, the positioning boss 9 cooperates with the groove 10 to realize the positioning of the upper and lower positions of the cartridge 4 and the cartridge seat 3, and avoid the up and down shaking of the cartridge 4 within the cartridge seat 3. In order to better realize the positioning of the upper and lower positions, the positioning boss 9 is in the shape of a long strip extending along the length direction of the cartridge 4. In order to facilitate the insertion of the cartridge 4 along the length direction of the cartridge seat 3, the groove 10 extends along the length direction of the cartridge seat 3, the distal end communicates with the outside, and the proximal end is connected to the positioning hole 7.

[0049] As Figure 2 and Figures 14 to 17 shown, an elastic member 8 is fixedly provided on the distal end surface of the fixing block within the rod body 1. Preferably, there are two elastic members 8 which are symmetrically arranged left and right, and a channel for the cutting push knife to pass through is formed between the two elastic members 8. When the cartridge 4 is installed on the cartridge seat 3, the buckle 6 is located within the positioning hole 7, the elastic member 8 is in a compressed state and abuts against the proximal end surface of the cartridge 4; when the buckle 6 is pressed inward, the cartridge 4 deforms inward, the buckle 6 is disengaged from the positioning hole 7, and the cartridge 4 moves distally under the elastic force of the elastic member 8, realizing the removal of the cartridge 4 from the cartridge seat 3.

[0050] When the pressing buckle 6 is pressed in this application, the staple cartridge 4 deforms inward. On the one hand, it is due to the structure of the staple cartridge 4. The housing of the staple cartridge 4 has an intermediate slit for the cutting push knife to pass through. In order to make it more conducive to the inward deformation of the staple cartridge 4, the buckle 6 is preferably arranged at a position close to the middle of the staple cartridge 4. On the other hand, it is due to the material of the housing of the staple cartridge 4. In this application, the housing of the staple cartridge 4 is made of nylon material.

[0051] The operation process of the endoscopic stapler in this application is as follows:

[0052] 1. By closing the firing handle, the push blade is used to push the cutting push knife to move distally. The cutting push knife pushes the wedge-shaped push block to lift the staple and the anastomosis nail to achieve the actions of closing the jaws and suturing and cutting tissues.

[0053] 2. Pull back the release handle to drive the push blade to pull back the cutting push knife, open the jaws, and complete the whole operation.

[0054] 3. Remove the old staple cartridge 4 and install a new staple cartridge 4.

[0055] The process of loading and unloading the staple cartridge 4 in this application is as follows:

[0056] Installation:

[0057] The buckle 6 and the positioning boss 9 of the staple cartridge 4 are aligned with the groove 10 of the staple cartridge seat 3. Insert the staple cartridge 4 into the staple cartridge seat 3 along the longitudinal direction of the staple cartridge seat 3 (i.e., the distal-proximal direction) from the distal opening of the groove 10 until the buckle 6 of the staple cartridge 4 slides into the positioning hole 7 and bounces up, which means that the staple cartridge 4 is installed in place. At the same time, the tail end (i.e., the proximal end face) of the staple cartridge 4 will press the elastic member 8 (such as a spring) tightly.

[0058] Disassembly:

[0059] Press the buckle 6 of the staple cartridge 4 inward with two fingers. Utilizing the intermediate gap and elasticity of the staple cartridge 4, the buckle 6 of the staple cartridge 4 deforms inward and disengages from the positioning hole 7. At the same time, the elastic force of the compressed spring will automatically push the staple cartridge 4 out along the direction of the groove 10 of the staple cartridge seat 3, so as to remove the staple cartridge 4 from the staple cartridge seat 3.

[0060] The structure of the present utility model is simpler, and the installation and disassembly operations are more time-saving and labor-saving, thus facilitating the machining and manufacturing of the machine, facilitating the medical staff to replace the staple cartridge 4 during the operation, improving the operation efficiency, and saving the operation time.

[0061] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A laparoscopic stapler, comprising a shaft (1), a staple cartridge seat (3) rotatably connected to the distal end of the shaft (1), and a staple cartridge (4) detachably connected to the staple cartridge seat (3), characterized in that: The left and right sides of the nail magazine (4) are formed with buckles (6) protruding outward, and the nail magazine seat (3) is formed with a positioning hole (7) that can be engaged with the buckle (6). The positioning hole (7) is a through hole that penetrates the inner and outer surfaces of the nail magazine seat (3). An elastic member (8) is fixedly arranged on the distal end surface of the rod body (1). When the nail magazine (4) is installed on the nail magazine seat (3), the buckle (6) is located in the positioning hole (7), and the elastic member (8) is in a compressed state and is against the proximal end surface of the nail magazine (4); when the buckle (6) is pressed inward, the nail magazine (4) is deformed inward, the buckle (6) is separated from the positioning hole (7), and the nail magazine (4) moves toward the distal end under the elastic force of the elastic member (8).

2. The laparoscopic stapler according to claim 1, characterized in that: There are two buckles (6) which are symmetrically arranged on the left and right sides of the nail magazine (4).

3. The laparoscopic stapler according to claim 1, characterized in that: The distal end surface (61) of the buckle (6) is perpendicular to the side surface of the nail magazine (4), and the proximal end surface (62) of the buckle (6) is inclined outward from the proximal end to the distal end.

4. The laparoscopic stapler according to claim 3, characterized in that: The outer end surface (63) of the buckle (6) is a plane and is parallel to the side surface of the nail magazine (4).

5. The laparoscopic stapler according to claim 1, characterized in that: The positioning holes (7) are provided on the side surface and the top surface of the nail magazine seat (3).

6. The laparoscopic stapler according to claim 5, characterized in that: When the buckle (6) is located in the positioning hole (7), the buckle (6) does not protrude from the outer side surface of the nail magazine seat (3).

7. The laparoscopic stapler according to claim 5, characterized in that: The positioning hole (7) is surrounded by a lower hole wall (72) located on the side of the nail magazine seat (3), an upper hole wall (73) located on the top surface of the nail magazine seat (3), and a distal hole wall (71) and a proximal hole wall (74) located on the side and top surfaces of the nail magazine seat (3); when the buckle (6) is located in the positioning hole (7), the upper hole wall (73) is located on the inner side of the outer end surface (63) of the buckle (6).

8. The laparoscopic stapler according to claim 5 or 7, characterized in that: The top surface of the nail magazine seat (3) is arc-shaped in cross section.

9. The laparoscopic stapler according to claim 1, characterized in that: The left and right side surfaces of the nail magazine (4) are also formed with positioning convex bumps (9) protruding outwards, the positioning convex bumps (9) are located at the distal end of the buckle (6), the width of the positioning convex bumps (9) is substantially equal to the width of the buckle (6) and the thickness of the positioning convex bumps (9) is less than the thickness of the buckle (6), and the inner surfaces of the left and right side surfaces of the nail magazine seat (3) are formed with grooves (10) for the positioning convex bumps (9) and the buckle (6) to slide, the width of the grooves (10) is slightly greater than the width of the positioning convex bumps (9), and the grooves (10) extend along the length direction of the nail magazine seat (3) and the distal end is connected to the outside.

10. The laparoscopic stapler according to claim 1, characterized in that: There are two elastic members (8) which are arranged symmetrically on both sides.

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