Nail abutting seat assembly of tubular anastomat

Abstract

The utility model discloses a tubular anastomat nail abutting seat component, which comprises a nail abutting seat, a clamp spring tube and a knife pad ring, a plug-in fastening component matched with the clamp spring tube is arranged between one end of the clamp spring tube close to the nail abutting seat and the nail abutting seat, and the nail abutting seat and the clamp spring tube are in fastening connection through the plug-in fastening component. The cutter cushion ring is embedded and attached to the inner wall face of a cavity, facing the side face of the clamping spring pipe, of the nail abutting base. According to the anastomat nail abutting seat assembly, the nail abutting seat and the clamp spring pipe are connected in the buckling mode through the inserting buckling assembly, other special clamps are not needed when the anastomat nail abutting seat assembly is assembled, meanwhile, the welding procedure is omitted, it is guaranteed that the concentric corresponding precision of the assembled nail abutting seat and the clamp spring pipe is high, and the assembling efficiency is improved. Therefore, it is ensured that the knife cushion ring cannot deform after being embedded in the cavity of the nail abutting seat, the annular knife can smoothly cut the knife cushion ring in the operation process, and the anastomosis nail is formed perfectly. The stapler nail abutting seat assembly is high in assembling efficiency and high in product percent of pass.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to an anvil assembly of a tubular stapler. Background Art

[0002] A disposable tubular stapler uses a circular knife to excise redundant pathological tissues, and at the same time drives in two rows of staggered staples arranged in a circle to close the remaining tissues. The disposable tubular stapler is mainly applicable to end-to-end, end-to-side and side-to-side anastomoses of the digestive tract in digestive tract reconstruction surgeries such as the esophagus, stomach, and intestine.

[0003] At present, the anvil assembly in a disposable tubular stapler on the market is composed of an anvil, a knife pad ring and a retaining ring tube, wherein the anvil and the retaining ring tube are of a split structure. After the anvil and the retaining ring tube are independently processed and formed, a special fixture is used to assemble the retaining ring tube into the corresponding mounting hole of the anvil, and then the end of the retaining ring tube is welded to the anvil. Since the corresponding positioning accuracy will be affected during the assembly and welding processes of the retaining ring tube and the anvil, and there is a problem that the assembly and welding firmness of the retaining ring tube and the anvil cannot be guaranteed, during the operation, the knife pad ring will tilt in the anvil under a little external force, resulting in deformation of the knife pad ring when the circular knife cuts the knife pad ring, and the staples cannot enter the anvil, resulting in imperfect or even unformed staples, and in severe cases, it will even lead to the failure of the operation. Summary of the Invention

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide an anvil assembly of a tubular stapler. The anvil and the retaining ring tube are snap-connected through a plug-in snap-fit assembly. When assembling the anvil assembly of the stapler, no other special fixture is required, and at the same time, the welding process is omitted, ensuring high concentric corresponding accuracy of the assembled anvil and retaining ring tube, so as to ensure that the knife pad ring will not deform after being installed in the cavity inner wall surface of the anvil, so that during the operation, the circular knife can smoothly cut the knife pad ring, and the staples are formed perfectly; the operation of assembling the anvil, the retaining ring tube and the knife pad ring into the anvil assembly of the stapler is simple, ensuring the high efficiency during the assembly and processing of the anvil assembly of the stapler, and at the same time improving the product qualification rate.

[0005] To achieve the above purpose, the technical solution of the utility model is to design an anvil assembly of a tubular stapler, including an anvil, a retaining ring tube and a knife pad ring. There is a mutually adapted plug-in snap-fit assembly between one end of the retaining ring tube close to the anvil and the anvil. The anvil and the retaining ring tube are snap-connected through the plug-in snap-fit assembly. The knife pad ring is installed and fitted on the inner wall surface of the cavity on the side of the anvil facing the retaining ring tube.

[0006] A staple anvil assembly of the utility model, the staple anvil and the retaining spring tube are snap-connected through a plug-in snap-fit assembly. When assembling the staple anvil assembly of the stapler, no other special fixtures are required, and the welding process is omitted, ensuring high concentric correspondence accuracy between the assembled staple anvil and the retaining spring tube, so as to ensure that the cutting pad ring will not deform after being installed inside the cavity of the staple anvil, enabling the annular knife to smoothly cut the cutting pad ring during the operation and making the formed staples in good condition; the process of assembling the staple anvil, the retaining spring tube and the cutting pad ring into the staple anvil assembly of the stapler is simple in operation, ensuring the high efficiency during the assembly and processing of the staple anvil assembly of the stapler, and improving the product qualification rate at the same time.

[0007] The preferred technical solution is that a stepped shaft is vertically and fixedly provided at the center of one side surface of the staple anvil facing the retaining spring tube. At least two corresponding plug-in legs are coaxially provided on the end surface of the stepped shaft far from the staple anvil. One end of the plug-in leg far from the stepped shaft has a clamping foot one extending outward. There is a guiding shaft hole penetrating the central axis inside the retaining spring tube. An annular groove two is provided on the inner wall surface of the guiding shaft hole near the staple anvil. When the plug-in legs on the staple anvil are inserted into the guiding shaft hole of the retaining spring tube, the clamping foot one is clamped inside the annular groove two of the retaining spring tube. The plug-in legs, the clamping foot one, the guiding shaft hole and the annular groove two constitute the plug-in snap-fit assembly. The structure of the plug-in snap-fit assembly is ingenious and reasonable, ensuring the convenience of operation when the staple anvil and the retaining spring tube are snap-connected, and enabling the smooth preparation and implementation of the staple anvil assembly of the utility model.

[0008] A further preferred technical solution is that an annular groove one is provided at the bottom end of the inner wall surface of the upper cavity of the staple anvil. The cutting pad ring has an annular groove three with an opening facing the staple anvil. A plurality of circumferentially spaced clamping feet two are provided on the outer peripheral surface of the cutting pad ring near the opening end of the annular groove three. When the cutting pad ring is fitted and installed on the inner wall surface of the cavity on one side of the staple anvil facing the retaining spring tube, the plurality of clamping feet two are clamped inside the annular groove one. The cutting pad ring is clamped and fitted on the inner wall surface of the upper cavity of the staple anvil through a plurality of clamping feet two on the outer peripheral side, ensuring the installation accuracy and stability of the cutting pad ring inside the upper cavity of the staple anvil.

[0009] A further preferred technical solution is that a plurality of mounting holes for mounting the end cover are provided on the staple anvil.

[0010] A further preferred technical solution is that a plurality of guiding ribs along its length direction are circumferentially spaced on the outer side surface of the retaining spring tube, and a plurality of retaining spring grooves along its length direction are circumferentially spaced on the retaining spring tube.

[0011] A further preferred technical solution is that the staple anvil and the retaining spring tube are respectively integrally injection-molded parts.

[0012] The advantages and beneficial effects of the present utility model are as follows:

[0013] 1. For the anvil assembly of the tubular stapler of the present utility model, the anvil and the retaining ring tube are snap-connected through the plug-in snap-fit assembly. When assembling the stapler anvil assembly, no other special fixtures are required, and the welding process is omitted, ensuring a high concentric correspondence accuracy between the assembled anvil and the retaining ring tube. Thus, it is ensured that the cutting pad ring will not be deformed after being installed inside the anvil cavity, enabling the annular knife to smoothly cut the cutting pad ring during the operation and making the staples well formed; the process of assembling the anvil, the retaining ring tube, and the cutting pad ring into the stapler anvil assembly is simple to operate, ensuring the high efficiency of assembling and processing the stapler anvil assembly, and at the same time improving the product qualification rate.

[0014] 2. The structure of the plug-in snap-fit assembly is ingeniously and reasonably designed, ensuring the convenience of the operation when the anvil and the retaining ring tube are snap-connected, enabling the smooth preparation and implementation of the stapler anvil assembly of the present utility model.

[0015] 3. The cutting pad ring is snap-connected and fitted to the inner wall surface of the upper cavity of the anvil through a plurality of second clamping feet on the outer peripheral side, ensuring the installation accuracy and stability of the cutting pad ring inside the upper cavity of the anvil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the left front side of the anvil assembly of the tubular stapler of the present utility model;

[0017] Figure 2 is a perspective view of the left rear side of the anvil assembly of the tubular stapler of the present utility model;

[0018] Figure 3 is a perspective view of the left front side of the anvil;

[0019] Figure 4 is a perspective view of the left rear side of the anvil;

[0020] Figure 5 is a longitudinal sectional view of the anvil along the axial line;

[0021] Figure 6 is a sectional view of the anvil assembly of the tubular stapler of the present utility model along the axial line;

[0022] Figure 7 is a sectional view of the retaining ring tube along the axial line;

[0023] Figure 8 is a perspective view of the left rear side of the cutting pad ring.

[0024] In the figure: 1. anvil; 2. retaining ring tube; 3. cutting pad; 1-1. stepped shaft; 1-2. insertion leg; 1-3. first clamping foot; 1-4. mounting hole; 1-5. cavity; 1-6. first annular groove; 2-1. guide shaft hole; 2-2. second annular groove; 2-3. guide rib; 2-4. retaining ring groove; 3-1. third annular groove; 3-2. second clamping foot. Detailed implementation manners

[0025] The following combines the accompanying drawings and embodiments to further describe the detailed implementation manners of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0026] Embodiment

[0027] As Figures 1 to 8 shown, the present utility model is an anvil assembly of a tubular stapler, including an anvil 1, a retaining ring tube 2 and a cutting pad 3. There is an adapted insertion and clamping assembly between one end of the retaining ring tube 2 close to the anvil 1 and the anvil 1. The anvil 1 and the retaining ring tube 2 are clamped and connected through the insertion and clamping assembly. The cutting pad 3 is embedded and fitted on the inner wall surface of the cavity 1-5 on the side of the anvil 1 facing the retaining ring tube 2.

[0028] Preferably, a stepped shaft 1-1 is vertically fixed at the center of one side of the anvil 1 facing the retaining ring tube 2. At least two corresponding insertion legs 1-2 are coaxially provided on the end surface of the stepped shaft 1-1 far from the anvil 1. One end of the insertion leg 1-2 far from the stepped shaft 1-1 has a first clamping foot 1-3 extending outward. The retaining ring tube 2 has a guide shaft hole 2-1 penetrating its central axis. One end of the inner wall surface of the guide shaft hole 2-1 close to the anvil 1 has a second annular groove 2-2. When the insertion legs 1-2 on the anvil 1 are inserted into the guide shaft hole 2-1 of the retaining ring tube 2, the first clamping foot 1-3 is clamped inside the second annular groove 2-2 of the retaining ring tube 2. The insertion legs 1-2, the first clamping foot 1-3, the guide shaft hole 2-1 and the second annular groove 2-2 constitute the insertion and clamping assembly.

[0029] Further preferably, the bottom end of the inner wall surface of the cavity 1-5 on the anvil 1 has a first annular groove 1-6. The cutting pad 3 has a third annular groove 3-1 with an opening facing the anvil 1. The outer peripheral surface of the cutting pad 3 has a plurality of second clamping feet 3-2 circumferentially spaced apart near the opening end of the third annular groove 3-1. When the cutting pad 3 is embedded and fitted on the inner wall surface of the cavity 1-5 on the side of the anvil 1 facing the retaining ring tube 2, the plurality of second clamping feet 3-2 are clamped inside the first annular groove 1-6.

[0030] Further preferably, the anvil 1 is provided with a plurality of mounting holes 1-4 for mounting end caps.

[0031] Further preferably, a plurality of guiding ribs 2-3 along its length direction are circumferentially and spacedly arranged on the outer side surface of the circlip tube 2, and a plurality of circlip grooves 2-4 along its length direction are circumferentially and spacedly arranged on the circlip tube 2.

[0032] Further preferably, the anvil 1 and the circlip tube 2 are respectively integrally injection-molded parts.

[0033] Assembly principle of an anvil assembly of a tubular stapler of the present utility model:

[0034] The cutting pad 3 is embedded inside the cavity 1-5 of the anvil 1, and the annular groove three 3-1 faces the side of the anvil 1, and a plurality of second clamping feet 3-2 are clamped inside the first annular groove 1-6 of the anvil 1; then, a plurality of insertion legs 1-2 on the anvil 1 are inserted into one end of the circlip tube 2 having the second annular groove 2-2 (with guiding ribs 2-3 on the outside), and after the insertion is in place, the first clamping feet 1-3 on the insertion legs 1-2 are clamped inside the second annular groove 2-2.

[0035] For an anvil assembly of a tubular stapler of the present utility model, the anvil and the circlip tube are snap-connected through a plug-in snap-fit assembly. When assembling the anvil assembly of the stapler, no other special fixtures are required, and the welding process is omitted, ensuring a high concentric corresponding accuracy between the assembled anvil and the circlip tube. Thus, it is ensured that the cutting pad will not be deformed after being embedded inside the cavity of the anvil, enabling the annular knife to smoothly cut the cutting pad during the operation and ensuring that the staples are formed perfectly; the process of assembling the anvil, the circlip tube, and the cutting pad into the anvil assembly of the stapler is simple in operation, ensuring the high efficiency of assembling and processing the anvil assembly of the stapler, and at the same time improving the product qualification rate.

[0036] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A tubular stapler anvil assembly, characterized in that: It comprises a pin holder (1), a spring-loaded tube (2) and a washer ring (3); a plug-in and buckle assembly which fits with each other is arranged between the end of the spring-loaded tube (2) close to the pin holder (1) and the pin holder (1); the pin holder (1) and the spring-loaded tube (2) are buckled and connected via the plug-in and buckle assembly; the washer ring (3) is embedded and fitted on the inner wall surface of a cavity (1-5) on the side of the pin holder (1) facing the spring-loaded tube (2); The anvil seat (1) is vertically fixed with a stepped shaft (1-1) at the center of one side of the retaining spring tube (2); the end surface of the stepped shaft (1-1) away from the anvil seat (1) is coaxially provided with at least two corresponding plug-in legs (1-2); the end of the plug-in leg (1-2) away from the stepped shaft (1-1) has a plug-in pin (1-3) extending outward; the retaining spring tube (2) has a guide shaft hole (2-1) passing through the central axis thereof; the guide shaft The inner wall of the hole (2-1) is provided with an annular groove 2 (2-2) at one end close to the annular support (1). When the plug-in leg (1-2) on the annular support (1) is plugged into the guide shaft hole (2-1) of the retaining spring tube (2), the first clamping pin (1-3) is clamped into the second annular groove (2-2) of the retaining spring tube (2). The plug-in leg (1-2), the first clamping pin (1-3), the guide shaft hole (2-1) and the second annular groove (2-2) constitute the plug-in buckling assembly.

2. The tubular stapler anvil assembly according to claim 1, characterized in that: The bottom end of the inner wall surface of the upper cavity (1-5) of the anvil seat (1) has an annular groove one (1-6), the washer ring (3) has an annular groove three (3-1) opening toward the anvil seat (1), and the outer peripheral surface of the washer ring (3) has a plurality of snap-in pins two (3-2) distributed circumferentially and spaced near the opening end of the annular groove three (3-1). When the washer ring (3) is embedded and fitted on the inner wall surface of the cavity (1-5) on the side of the anvil seat (1) facing the retaining spring tube (2), a plurality of the snap-in pins two (3-2) are snap-fitted inside the annular groove one (1-6).

3. The tubular stapler anvil assembly according to claim 2, characterized in that: The anvil seat (1) is provided with a plurality of mounting holes (1-4) for mounting the end cover.

4. The tubular stapler anvil assembly according to claim 3, characterized in that: The outer side surface of the snap ring tube (2) is provided with a plurality of guide ribs (2-3) at intervals along its length direction in an annular direction, and the snap ring tube (2) is provided with a plurality of snap ring grooves (2-4) at intervals along its length direction in an annular direction.

5. The tubular stapler anvil assembly according to claim 4, characterized in that: The anvil seat (1) and the spring clip tube (2) are respectively integral injection-molded parts.

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