Endoscope anastomat with percussion protection mechanism

Abstract

According to the endoscope anastomat with the percussion protection mechanism, a main body is the endoscope anastomat, a nail pushing block of the endoscope anastomat is provided with a limiting part, and when the nail pushing block is located at the initial position, the limiting part extends out of the near end of a nail bin assembly; the cutting knife group comprises a connecting rod and a cutting knife part located at the front end of the connecting rod, the cutting knife part is rotationally connected to the front end of the connecting rod, an upper boss is arranged on the upper portion of the side face of the cutting knife part, a rib is arranged at the front end of the cutting knife part, and a lower boss is arranged on the lower portion of the side face of the cutting knife part; a guide cavity extending in the front-back direction is formed in a nail abutting base of the endoscope anastomat, an opening communicated with the guide cavity is formed in the rear portion of the anastomosis face of the nail abutting base and used for containing the cutting knife set, and a limiting step used for abutting against the lower boss is formed in the front side of the opening. The hollow nail bin protection mechanism has the advantages that the hollow nail bin protection mechanism is adopted, the original mode that the cutting knife assembly is clamped in a buckling mode is omitted, a new scheme is designed, the influence of large resistance is avoided during percussion, and the stability and reliability of the anastomat are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a laparoscope anastomat with a firing protection mechanism. BACKGROUND

[0002] An anastomat is a common medical device in surgical medical devices, which can replace manual suture operation, and only needs to operate the anastomat to realize wound anastomosis, tissue cutting and other actions. Therefore, it is widely used in open or minimally invasive general surgery, thoracic surgery and pediatric surgery and other surgeries. Its main working principle is to use titanium nail tissue to perform disconnection and anastomosis connection suture, which can reduce or eliminate bleeding from soft tissue during cutting tissue. The anastomat includes a handle assembly, a transmission assembly and an end effector. Among them, the end effector includes a nail cartridge assembly 7 and a nail holder, the nail cartridge assembly 7 includes a push block, a nail pusher and a cutting knife, and the nail cartridge assembly 7 is provided with a sliding groove capable of passing the cutting knife, and the handle assembly is provided with a trigger, a button or a push button for controlling the cutting knife. When working, the tissue is placed between the nail cartridge assembly 7 and the nail holder, the nail holder of the end effector is pivoted to the nail cartridge assembly 7 side to clamp the tissue by pulling the firing trigger, and after the tissue is clamped, the cutting knife is controlled to move along the sliding groove of the nail holder to cut the tissue; the cutting knife and the sliding block translate synchronously, the sliding block pushes the nail pusher to rise from the nail cartridge, and the nail pusher pushes the titanium nail to implant into the tissue to realize tissue suture. However, in actual operation, the doctor will use one end of the nail holder to pick up the tissue, but the nail holder can be rotated, which is not convenient to operate.

[0003] 1. The fixed end of the current technology nail cartridge seat, the nail holder is a swing end, which is not convenient for the doctor to pick up the tissue in actual operation.

[0004] The current empty nail cartridge protection mechanism is a buckle form for clamping the cutting knife assembly, and a relatively large resistance needs to be overcome to work normally in actual initial firing, which is easy to cause the gun to stop working by mistake. SUMMARY

[0005] The purpose of the present application is to provide a laparoscope anastomat with a firing protection mechanism, which realizes the protection mechanism for the empty nail cartridge assembly 7 or the protection mechanism for the used nail cartridge assembly 7, and solves the safety hidden trouble caused by misoperation in actual operation of the operator.

[0006] The present application realizes the technical scheme as follows: a laparoscope anastomat with a firing protection mechanism, a main body is a laparoscope anastomat, a front end of the laparoscope anastomat is provided with a nail abutting seat 8 and a nail cartridge seat 5, the nail cartridge seat 5 is pivotally connected with the nail abutting seat 8, so that the nail cartridge seat 5 rotates relative to the nail abutting seat 8, and the closing or opening of the nail cartridge seat 5 and the nail abutting seat 8 is realized by controlling a first firing structure of the laparoscope anastomat; a cutting knife group 9 is further arranged in the laparoscope anastomat, and the cutting knife group 9 is designed to realize the forward and backward movement of the cutting knife group 9 by controlling a second firing structure of the laparoscope anastomat.

[0007] A nail cartridge assembly 7 is arranged on the nail cartridge seat 5 and is detachably connected with the nail cartridge seat 5; a nail pushing block 10 is arranged in the nail cartridge assembly 7 and is capable of sliding forward and backward, so that when the cutting knife group 9 is controlled to move to the front end after the closing of the rotating part and the fixed part, the cutting knife group 9 abuts against the nail pushing block 10 and drives the nail pushing block 10 to move to the front end.

[0008] The present application is characterized in that: the nail pushing block 10 is provided with a limiting part, and when the nail pushing block 10 is in an initial position, the limiting part extends out of the proximal end of the nail cartridge assembly 7; the cutting knife group 9 is divided into a connecting rod 9-2 and a cutting knife part 9-1 located at the front end of the connecting rod 9-2, the cutting knife part 9-1 is rotatably connected to the front end of the connecting rod 9-2, an upper protrusion 3-2 is arranged on the side upper part of the cutting knife part 9-1, a rib 3-1 is arranged at the front end of the cutting knife part 9-1, and a lower protrusion 3-3 is arranged on the side lower part of the cutting knife part 9-1.

[0009] A guide cavity 8-3 extending forward and backward is arranged in the nail abutting seat 8, an opening communicating with the guide cavity 8-3 is arranged at the rear part of the anastomosis surface of the nail abutting seat 8, the opening is used for accommodating the cutting knife group 9, and a limiting step 8-1 used for abutting against the lower protrusion 3-3 is formed at the front side of the opening; a spring 8-2 is arranged on the limiting step 8-1, and the spring 8-2 abuts against the upper protrusion 3-2 and drives the cutting knife part 9-1 to be upward pushed.

[0010] The limiting part is designed to abut against the rib 3-1 and drive the cutting knife part 9-1 to swing downward to overcome the elastic force of the spring 8-2 when the nail cartridge seat 5 is closed, so that the lower protrusion 3-3 is separated from the limiting step 8-1 and is aligned with the guide cavity 5-1.

[0011] Compared with the prior art, the present application has the beneficial effects of: an empty nail cartridge protection mechanism, the original buckle form for clamping the cutting knife assembly is removed, a new scheme is designed, and there is no large resistance influence during firing, and the stability and reliability of the anastomat are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an explosion view of the anastomosis part of the laparoscope anastomat of the present application.

[0013] Figure 2 It is a state view when the nail cartridge seat and the nail abutting seat of the laparoscope anastomat of the present application are opened.

[0014] Figure 3 This is a diagram showing the state of the staple cartridge and anvil in the laparoscopic stapler of the present invention when they are closed;

[0015] Figure 4 This is a schematic diagram of the anvil in the laparoscopic anastomosis device of the present invention;

[0016] Figure 5 In order to be in Figure 4 A schematic diagram of the structure with added spring clips on the basic basis;

[0017] Figure 6 This is a schematic diagram of the front end of the cutting blade assembly.

[0018] Labeling Explanation: 3-1 Rib, 3-2 Upper Boss, 3-3 Lower Boss, 5 Nail Clip Seat, 7 Nail Clip Assembly, 8 Nail Anchor Seat, 8-1 Limiting Step, 8-2 Spring Sheet, 8-3 Guide Cavity, 9 Cutting Blade Assembly, 9-1 Cutting Blade Section, 9-2 Connecting Rod, 9-3 Limiting Notch, 9-4 Connecting Section, 9-5 Insert, 10 Nail Pusher Block. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings:

[0020] like Figures 1-6 As shown: A laparoscopic stapler with a firing protection mechanism, the main body is a laparoscopic stapler, the front end of which is provided with a pin seat 8 and a staple cartridge seat 5, the staple cartridge seat 5 is pivotally connected to the pin seat 8, so that the staple cartridge seat 5 rotates relative to the pin seat 8, and the closing or opening of the staple cartridge seat 5 and the pin seat 8 is realized by controlling the first firing mechanism of the laparoscopic stapler; a cutting blade assembly 9 is also provided inside the laparoscopic stapler, the cutting blade assembly 9 is designed to move back and forth by controlling the second firing mechanism of the laparoscopic stapler;

[0021] The staple cartridge 5 is provided with a staple cartridge assembly 7 that is detachably connected to it; the staple cartridge assembly 7 is provided with a pusher block 10 that slides back and forth, so that when the rotating part and the fixed part are closed, the cutting blade assembly 9 moves to the front end by controlling the cutting blade assembly 9 to abut against the pusher block 10 and drive the pusher block 10 to move to the front end.

[0022] When the pusher block 10 is in its initial position, the limiting part extends out of the proximal end of the nail cartridge assembly 7; the cutting blade assembly 9 is divided into a connecting rod 9-2 and a cutting blade part 9-1 located at the front end of the connecting rod 9-2. The cutting blade part 9-1 is rotatably connected to the front end of the connecting rod 9-2. The upper side of the cutting blade part 9-1 is provided with an upper boss 3-2, the front end of the cutting blade part 9-1 is provided with a rib 3-1, and the lower side of the cutting blade part 9-1 is provided with a lower boss 3-3.

[0023] The resistance nail seat 8 is provided with a front and back extending guide cavity 8-3, and the resistance nail seat 8 is provided with an opening communicated with the guide cavity 8-3 at the rear of the anastomosis surface, the opening is used for accommodating the cutting knife group 9, and the front side of the opening forms a limiting step 8-1 used for abutting against the lower boss 3-3; the limiting step 8-1 is provided with an elastic sheet 8-2, the elastic sheet 8-2 abuts against the upper boss 3-2 and drives the cutting knife part 9-1 to be pushed upward;

[0024] The limiting part is designed to abut against the rib 3-1 and drive the cutting knife part 9-1 to swing downward to overcome the elastic force of the elastic sheet 8-2 when the nail cartridge seat 5 is closed, so that the lower boss 3-3 is separated from the limiting step 8-1 and aligned with the guide cavity 5-1.

[0025] The core of the present application is that the nail cartridge assembly 74 is resisted by the resistance nail seat 8, and through the structure, whether the nail cartridge assembly 74 is installed or whether the nail cartridge assembly 74 is used is determined.

[0026] Because the limiting mechanism is arranged on the anastomosis nail and the cutting knife group 9 in the nail cartridge assembly 74 during use, the cutting knife part 9-1 abuts against the limiting step 8-1 through the action of the elastic sheet 8-2 under the premise that the pushing nail block 10 is not in the initial position, so that the cutting knife group 9 cannot be pushed forward; in this way, the cutting knife group 9 is prevented from being misfired when the nail cartridge assembly 74 is missing or the used nail cartridge assembly 74 is used.

[0027] The specific use mode will be described below.

[0028] When the nail cartridge assembly 74 is not installed or the nail cartridge assembly 74 has been used, because the pushing nail block 10 is missing, when the nail cartridge seat 5 is closed, the front end of the cutting knife part 9-1 is provided with the rib 3-1 and is not limited by the limiting part of the pushing nail block 10, at this time, the cutting knife part 9-1 is in a lifted state under the action of the elastic sheet 8-2, at this time, the lower boss 3-3 abuts against the limiting step 8-1, so that the cutting knife group 9 cannot be fired.

[0029] When the brand new nail cartridge assembly 74 is installed in place, when the nail cartridge seat 5 is closed, the rib 3-1 at the front end of the cutting knife part 9-1 is pressed by the limiting part of the pushing nail block 10, the whole cutting knife part 9-1 is lowered to overcome the deformation of the elastic sheet 8-2, so that the lower boss 3-3 is separated from the limiting step 8-1 and falls into the guide cavity 8-3 area, after firing the cutting knife group 9, the cutting knife group 9 as a whole will move forward under the guidance of the guide cavity 8-3.

[0030] The front end of the connecting rod 9-2 is provided with a limiting gap 9-3 which is through left and right and the cross section is an arc; the rear part of the cutting knife part 9-1 is connected with a connecting segment 9-4, the tail of the connecting segment 9-4 is provided with an embedding body 9-5 with a circular cross section, the embedding body 9-5 is embedded in the limiting gap 9-3, so that the cutting knife part 9-1 can realize small range up and down swing in the axis of the limiting gap 9-3.

[0031] The above design enables the cutting section 9-1 to swing vertically.

[0032] The staple cartridge holder 5 is provided with a locking groove, and the staple cartridge assembly 74 is provided with a locking protrusion that mates with the locking groove. This allows the staple cartridge assembly 74 to be replaced.

[0033] The lengths of the anvil 8 and the staple cartridge 5 are 60mm. With the same anastomosis length, such as 60mm, the overall length of the jaws is shortened, allowing the front jaws to swing and turn in confined spaces, preventing them from being too long and hitting tissue, thus facilitating the doctor's operation. Of course, the lengths of the anvil 8 and the staple cartridge 5 of this invention are also applicable to various anastomosis lengths.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laparoscopic stapler with a firing protection mechanism, the main body of which is a laparoscopic stapler. The front end of the laparoscopic stapler is provided with an anvil (8) and a staple cartridge seat (5). The staple cartridge seat (5) is pivotally connected to the anvil (8), so that the staple cartridge seat (5) rotates relative to the anvil (8). The staple cartridge seat (5) and the anvil (8) are closed or opened by controlling the first firing structure of the laparoscopic stapler. A cutting blade assembly (9) is also provided inside the laparoscopic stapler. The cutting blade assembly (9) is designed to move back and forth by controlling the second firing structure of the laparoscopic stapler. A staple cartridge assembly (7) is provided on the staple cartridge seat (5) and is detachably connected to it; a pusher block (10) that slides back and forth is provided in the staple cartridge assembly (7), so that when the rotating part and the fixed part are closed, the cutting blade assembly (9) moves to the front end by controlling the cutting blade assembly (9), the cutting blade assembly (9) abuts against the pusher block (10) and drives the pusher block (10) to move to the front end; Its features are: The pusher block (10) is provided with a limiting part and when the pusher block (10) is in the initial position, the limiting part extends out of the proximal end of the nail cartridge assembly (7); the cutting blade assembly (9) is divided into a connecting rod (9-2) and a cutting blade part (9-1) located at the front end of the connecting rod (9-2). The cutting blade part (9-1) is rotatably connected to the front end of the connecting rod (9-2). The upper side of the cutting blade part (9-1) is provided with an upper boss (3-2), the front end of the cutting blade part (9-1) is provided with a rib (3-1), and the lower side of the cutting blade part (9-1) is provided with a lower boss (3-3). The anvil (8) has a guide cavity (8-3) extending in the front and back direction. The rear part of the mating surface of the anvil (8) has an opening that communicates with the guide cavity (8-3). The opening is used to accommodate the cutting blade assembly (9). A limiting step (8-1) is formed on the front side of the opening for abutting against the lower boss (3-3). A spring piece (8-2) is installed on the limiting step (8-1). The spring piece (8-2) abuts against the upper boss (3-2) and drives the cutting blade part (9-1) to push upward. The limiting part is designed such that when the nail cartridge seat (5) is closed, the limiting part abuts against the rib (3-1) and drives the cutter part (9-1) to swing downward against the elastic force of the spring piece (8-2), so that the lower boss (3-3) disengages from the limiting step (8-1) and aligns with the guide cavity (5-1).

2. The laparoscopic stapler with a firing protection mechanism according to claim 1, characterized in that: The front end of the connecting rod (9-2) is provided with a limiting notch (9-3) that runs through the left and right and has an arc-shaped cross section; the rear connecting section (9-4) of the cutter part (9-1) has an insert (9-5) with a circular cross section at its tail end. The insert (9-5) is embedded in the limiting notch (9-3), so that the cutter part (9-1) can swing up and down in a small range along the central axis of the limiting notch (9-3).

3. The laparoscopic stapler with a firing protection mechanism according to claim 1, characterized in that: The staple cartridge seat (5) is provided with a slot, and the staple cartridge assembly (7) is provided with a slot protrusion that cooperates with the slot.

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