Bending piece for bending of anvil bending portion of a stapler, actuating mechanism and stapler

Abstract

The present application relates to the technical field of medical devices, and in particular to a bending piece for bending the bending part of a stapler anvil, an actuating mechanism and a stapler. The bending piece for bending the bending part of the stapler anvil has a slot for inserting the bending part of the anvil for bending. The slot includes an open first end, and first and second walls arranged opposite and parallel to each other, the first wall being connected to the first end, the inner sides of the first and second walls forming a force receiving surface of the bending part of the anvil, and the first end is provided with a bending structure capable of providing bending support when the bending part of the anvil is bent. Since the bending piece is provided with a force receiving surface and the bending structure can smoothly bend the bending part of the anvil, the angle of the bending part of the anvil can be adjusted according to the different to-be-sutured cut tissues to facilitate the separation of the to-be-sutured cut tissues from other surrounding tissues, and then the cut tissues can be cut into the jaw for suture cutting action, and the bending piece is easy to operate and labor-saving when in use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a bending piece for bending the bending part of the anvil of a stapler, an actuating mechanism and a stapler. BACKGROUND

[0002] In endoscopic surgery, endoscopic surgical cutting staplers are usually used in digestive tract such as esophagus, stomach, duodenum, small intestine, colon, rectum, appendix, gallbladder, pancreas and spleen for cutting and stapling surgery, and are also used in respiratory tract such as lung and trachea for cutting and stapling surgery, so as to reduce the operation time and improve the operation quality.

[0003] The cutting stapler comprises a stapler body, an actuating mechanism, an extension tube connecting the stapler body and the actuating mechanism, and an operating mechanism for controlling the operation of the actuating mechanism. The actuating mechanism comprises a cartridge holder, a cutting knife, a cartridge and an anvil. The cartridge is mounted on the cartridge holder. The anvil is mounted on a swing hinge through a movable shaft. In the direction perpendicular to the movable shaft, another movable shaft is installed on the swing hinge to fix the anvil on the swing hinge. The operating mechanism controls the movement of the cutting knife to control the opening and closing of the jaw composed of the cartridge and the anvil, and then performs the stapling or cutting operation of the tissue.

[0004] During the operation, in order to achieve the stapling and cutting operation after the closure of the cartridge, the tissue to be stapled and cut needs to be separated from the surrounding tissue. However, the anvil of the existing cutting stapler is usually in the form of a flat strip, which is not convenient for separating the tissue to be stapled and cut from the surrounding tissue due to the angle. Or the bending part of the existing anvil has a fixed bending angle, which is not convenient for separating the tissue to be stapled and cut from the surrounding tissue due to the different bending angles required for different parts of the tissue to be cut, so as to facilitate the entry of the tissue to be cut into the jaw for stapling and cutting operation. Moreover, there is no bending tool for bending the bending part of the anvil in the prior art, which is not convenient for bending the bending part of the anvil. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a bending piece for bending the bending part of the anvil of a stapler, an actuating mechanism and a stapler. The bending piece can bend the bending part of the anvil, which is simple and labor-saving, and can adjust the angle of the bending part of the anvil according to different tissues to be stapled and cut, so as to facilitate the separation of the tissue to be stapled and cut from the surrounding tissue, and then facilitate the entry of the tissue to be cut into the jaw for stapling and cutting operation.

[0007] (II) Technical solutions

[0008] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the present application include:

[0009] The folding piece for bending the anastomat anvil bending part provided by the embodiment of the present application has an insertion slot which can be inserted into the anvil bending part of the anvil for bending; the insertion slot comprises a first end which is open, and a first wall and a second wall which are oppositely and parallelly arranged, the first wall is connected to the first end, and the inner sides of the first wall and the second wall form the stress surface of the anvil bending part; a folding structure is arranged on the first end, which can provide bending support when the anvil bending part is bent.

[0010] Preferably, the length of the second wall extending towards the anvil is less than the length of the first wall extending towards the anvil.

[0011] Preferably, the folding piece further comprises a retaining structure which can fix the anvil bending part inside the insertion slot, and the retaining structure is arranged at the connection between the first wall and the first end.

[0012] Preferably, the retaining structure is at least one positioning block arranged on the folding structure.

[0013] Preferably, the folding piece further comprises a spring arm in a cantilever structure;

[0014] The fixed end of the spring arm is connected to the second wall, and the spring arm is used to abut the anvil bending part against the first wall.

[0015] Preferably, an abutting part is arranged on the movable end of the spring arm, which extends towards the second wall and is used to abut the anvil bending part against the first wall.

[0016] Preferably, the first end of the insertion slot extends towards the outside of the insertion slot to form an inclined surface which can limit the maximum bending angle; the included angle between the inclined surface and the horizontal plane is 35°±5°.

[0017] Preferably, an anti-skid part is arranged on the second end of the folding piece opposite to the first end.

[0018] The present application further provides an execution mechanism for an anastomat, the front end of the anvil of the execution mechanism is integrally formed with an anvil bending part which can be bent around the connection with the anvil; the connection is in a hollow structure, and the thickness thereof is at least less than the thickness of the anvil bending part.

[0019] Preferably, the execution mechanism further comprises a check piece; the check piece is arranged on the side wall of the connection of the anvil.

[0020] The present application further provides an anastomat comprising the above-mentioned execution mechanism for an anastomat, and the anvil bending part of the execution mechanism can be bent by means of the above-mentioned folding piece.

[0021] (III) Beneficial Effects

[0022] The beneficial effects of the present application are:

[0023] The folding piece for folding the anastomat nail anvil bending part provided by the present application can smoothly fold the nail anvil bending part due to the stress receiving surface and the folding structure, and can adjust the angle of the nail anvil bending part according to different to-be-sutured cut tissues, so as to separate the to-be-sutured cut tissue from other surrounding tissues, and then facilitate the to-be-cut tissue to enter the jaw for suture cutting action. The folding piece is easy and labor-saving to operate when in use.

[0024] The execution mechanism of the anastomat provided by the present application can adjust the angle between the nail anvil bending part and the nail anvil, and then adjust the angle of the nail anvil bending part according to different to-be-sutured cut tissues, so as to separate the to-be-sutured cut tissue from other surrounding tissues, and then facilitate the to-be-cut tissue to enter the jaw for suture cutting action.

[0025] The anastomat provided by the present application can adjust the angle of the nail anvil bending part according to different to-be-sutured cut tissues, so as to separate the to-be-sutured cut tissue from other surrounding tissues, and then facilitate the to-be-cut tissue to enter the jaw for suture cutting action. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the execution mechanism for anastomat of embodiment 1;

[0027] Figure 2 It is a structural schematic view of the reverse stopper in embodiment 1;

[0028] Figure 3 It is a structural schematic view of the initial state of the cooperation between the execution mechanism of the anastomat in embodiment 1 and the folding piece in embodiment 2;

[0029] Figure 4 It is a structural schematic view of the folding of the nail anvil bending part by using the folding piece;

[0030] Figure 5 It is a structural schematic view of the reverse force after the folding of the nail anvil bending part by using the folding piece;

[0031] Figure 6 It is a structural schematic view of the separation of the folding piece from the nail anvil bending part;

[0032] Figure 7 It is a structural schematic view of the first perspective of the folding piece in embodiment 2;

[0033] Figure 8 It is a structural schematic view of the second perspective of the folding piece in embodiment 2;

[0034] Figure 9 This is a structural schematic diagram of the bent component from a third-view perspective in Example 2.

[0035] [Explanation of Labels in the Attached Image]

[0036] 1: Actuator; 11: Stamp cartridge frame; 12: Stamp cartridge; 13: Stamp anvil; 14: Stamp anvil bend; 141: Hollowed-out structure; 142: Arc-shaped structure; 15: Backstop; 151: Strip-shaped reverse rack; 1511: Reverse rack; 152: Strip-shaped reverse rack groove; 1521: Reverse rack groove;

[0037] 2: Bending part; 21: First end; 22: Second end; 221: Anti-slip part; 222: Hollow structure; 23: First wall; 231: Weight reduction hole; 24: Second wall; 241: Side edge; 25: Bending structure; 26: Holding structure; 27: Spring arm; 271: Abutment part. Detailed Implementation

[0038] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides an actuator 1 for a stapler, including a staple cartridge frame 11, a cutting blade, a staple cartridge 12, and an anvil 13. The staple cartridge 12 is mounted on the staple cartridge frame 11, and the anvil 13 is mounted on a swing head hinge via a movable shaft. The staple cartridge 12 and the anvil 13 can open and close to form a jaw. When the tissue to be cut and sutured enters the jaw, the staple cartridge 12 and the anvil 13 close, and the actuator 1 sutures or cuts the tissue to be cut and sutured.

[0041] In order to facilitate the separation of the to-be-sewn and cut tissue from other surrounding tissues, and then facilitate the to-be-cut tissue to enter the jaw for the action of sewing and cutting. In the embodiment, the anvil 13 of the actuating mechanism 1 is integrally formed with an anvil bending portion 14 capable of bending around the connection of the anvil 13. In order to facilitate positioning with the folding member 2, the connection of the anvil 13 is in a hollow structure 141 (explained in detail below), and the thickness of the connection is at least less than the thickness of the anvil bending portion 14. In the embodiment, the longitudinal section of the anvil 13 after being connected with the anvil bending portion 14 is a two-way inwardly concave arc-shaped structure 142, that is, the thickness of the connection is less than the thickness of the anvil bending portion 14, which facilitates the bending of the anvil bending portion 14, and at the same time, the circular arc transition reduces the concentrated stress when the anvil bending portion 14 is bent.

[0042] It should be noted that the actuating mechanism 1 for the anastomat is in the initial state, and the anvil bending portion 14 and the anvil 13 are in a horizontal state. During the operation, due to the difference of the to-be-sewn and cut tissue, the required bending angle of the anvil bending portion 14 is different, and the doctor adjusts the bending angle of the anvil bending portion 14 according to the difference of the to-be-sewn and cut tissue, which facilitates the separation of the to-be-sewn and cut tissue from other surrounding tissues, and then facilitates the to-be-cut tissue to enter the jaw for the action of sewing and cutting.

[0043] As shown in Figure 2 In order to improve the reliability of the anvil bending portion 14 after bending, and prevent the reverse of the anvil bending portion 14 after bending, in the embodiment, the actuating mechanism 1 further comprises a reverse member 15, which is arranged on one side or both sides of the connection of the anvil 13, so as to limit the anvil bending portion 14 in the bent state after the anvil bending portion 14 is bent.

[0044] Specifically, the structure of the reverse member 15 comprises a strip-shaped ratchet 151 and a strip-shaped ratchet groove 152 arranged oppositely, at least one ratchet 1511 is arranged on the strip-shaped ratchet 151, and a plurality of ratchet grooves 1521 are arranged along the length direction of the strip-shaped ratchet groove 152, and the ratchet 1511 cooperates with the ratchet groove 1521. Among them, the strip-shaped ratchet 151 and the strip-shaped ratchet groove 152 are both flexible materials, when the actuating mechanism 1 is in the initial state, the ratchet 1511 on the strip-shaped ratchet 151 abuts in the ratchet groove 1521 at the end of the strip-shaped ratchet 151, when the anvil bending portion 14 is bent, the ratchet 1511 on the strip-shaped ratchet 151 moves relative to the strip-shaped ratchet groove 152, and then enters the inside ratchet groove 1521, because the ratchet 1511 cooperates with the ratchet groove 1521 to avoid the rebound trend of the anvil bending portion 14, so that the anvil bending portion 14 remains in the bent state.

[0045] Embodiment two

[0046] As shown in Figures 7-9As shown, the embodiment provides a bending piece 2 for bending the anastomat staple anvil bending portion 14, the bending piece 2 has a slot for inserting the staple anvil bending portion 14 in the first embodiment for bending. Wherein the slot includes an open first end 21, a second end 22 opposite to the first end 21, and a first wall 23 and a second wall 24 connected to the second end 22 and arranged opposite and parallel to each other, the other side of the first wall 23 is connected to the first end 21, the staple anvil bending portion 14 can extend between the first wall 23 and the second wall 24, the inner side of the first wall 23 and the second wall 24 forms the force surface of the staple anvil bending portion 14, a bending structure 25 is arranged at the first end 21 of the bending piece 2, which can provide bending support when the staple anvil bending portion 14 is bent, in the embodiment, the bending structure 25 is a bending pivot surface arranged on the side edge of the first end 21 for the staple anvil bending portion 14 to rotate, and the staple anvil bending portion 14 can rotate around the bending pivot surface to adjust the angle between the staple anvil bending portion 14 and the staple anvil 13.

[0047] Because the bending piece 2 is provided with the bending structure 25 capable of smoothly bending the staple anvil bending portion 14, the angle of the staple anvil bending portion 14 can be adjusted according to the different cut tissues to be sutured, which facilitates the separation of the cut tissue to be sutured from other surrounding tissues, so as to facilitate the cut tissue to enter the jaw for suture cutting action. And when the staple anvil bending portion 14 enters the slot, the length of the force of the staple anvil bending portion 14 is extended, thereby increasing the moment arm of the staple anvil bending portion 14, which is easy and labor-saving to operate.

[0048] In order to facilitate the positioning of the staple anvil bending portion 14 in the bending piece 2 and prevent the staple anvil bending portion 14 from slipping to smoothly bend and rotate, the bending piece 2 includes a retaining structure 26 capable of fixing the staple anvil bending portion 14 inside the slot, the retaining structure 26 is arranged at the connection between the first wall 23 and the first end 21, wherein the retaining structure 26 is at least one positioning block arranged on the bending structure 25, in the embodiment, the retaining structure 26 is two positioning blocks arranged on the bending pivot surface, and the corresponding hollow structure 141 on the connection between the staple anvil 13 and the staple anvil bending portion 14 is a positioning groove corresponding to the positioning block one by one. In order to facilitate the subsequent disengagement of the positioning block of the bending piece 2 and the positioning groove of the staple anvil bending portion 14, the positioning block and the positioning groove are clearance fit, and the height of the positioning block is less than the depth of the positioning groove.

[0049] As shown in the drawings, Figure 3 As shown in the drawings, Figure 6As shown, in use, the anvil bending portion 14 extends into the slot, and the anvil bending portion 14 is pressed downward to bend the bending piece 2. The end of the anvil bending portion 14 is in contact with the inner side of the second wall 24, and the anvil bending portion 14 rotates around the bending axis. According to the actual needs, the anvil bending portion 14 is bent to a certain angle, and then the bending piece 2 is pressed in the opposite direction to make the end of the anvil bending portion 14 in contact with the inner side of the first wall 23. Then the positioning block is separated from the positioning groove on the anvil bending portion 14, and finally the bending piece 2 is pulled away from the anvil 13 to separate the bending piece 2 from the anvil bending portion 14.

[0050] In order to facilitate the separation of the positioning block on the bending piece 2 from the positioning groove on the anvil bending portion 14, the second wall 24 extends to the anvil 13 in a length less than that of the first wall 23. When the bending piece 2 is pressed in the opposite direction, the anvil bending portion 14 is in contact with the second wall 24. The side edge 241 on the side of the second wall 24 close to the anvil bending portion 14 applies force to the anvil bending portion 14, and then the positioning block is separated from the positioning groove on the anvil bending portion 14. In actual application, the first wall 23 is provided with a weight-reducing hole 231, which can save materials and avoid the formation of pits on the appearance of the bending piece 2 due to plastic shrinkage.

[0051] In order to make the bending piece 2 adhere to the anvil bending portion 14 and not to be separated at will, and to ensure that the bending piece 2 does not deviate from the working position during bending, the bending piece 2 further comprises a cantilever structure of a resilient arm 27. The fixed end of the resilient arm 27 is connected to the second wall 24, and the resilient arm 27 is used to make the anvil bending portion 14 in contact with the first wall 23. When the anvil bending portion 14 is bent to a certain angle, the bending piece 2 is pressed in the opposite direction to deform the resilient arm 27, which does not hinder the separation of the positioning block of the bending piece 2 from the positioning groove of the anvil bending portion 14, and the bending piece 2 can be easily removed. Of course, in order to make the resilient arm 27 more stable in the working state, the resilient arm 27 is arranged at a relative position between the two positioning blocks.

[0052] Specifically, in order to make the anvil bending portion 14 stably in contact with the first wall 23, an abutting portion 271 is arranged on the movable end of the resilient arm 27, which extends towards the second wall 24 to make the anvil bending portion 14 in contact with the first wall 23. The abutting portion 271 can be a protrusion extending towards the second wall 24, which can be a rectangular block or a trapezoidal block with inclined side walls. In this embodiment, the specific shape of the abutting portion 271 is not limited, as long as it can make the anvil bending portion 14 in contact with the first wall 23.

[0053] Specifically, the first end 21 of the slot extends to the outside of the slot to form an inclined surface that can limit the maximum bending angle, which avoids the risk of the anvil bending portion 14 being bent too much and causing the connection between the anvil bending portion 14 and the anvil 13 to break. In actual application, the angle between the inclined surface and the horizontal plane is 35°±5°.

[0054] As Figure 1 shown, the second end 22 opposite to the first end 21 of the bending piece 2 is provided with an anti-skid part 221, the anti-skid part 221 is a protrusion arranged on the upper and lower surfaces of the second end 22, the protrusion can be a dot or a long strip structure, so as to facilitate the force application when the bending piece 2 is used. Of course, in the actual application process, since the bending piece 2 is usually made of plastic material, the hollow structure 222 is arranged on the two sides of the outer wall of the first end 21, the hollow structure 222 can save materials, and avoid the formation of holes on the appearance of the bending piece 2 due to plastic shrinkage.

[0055] Embodiment three

[0056] As Figures 3-6 shown, the embodiment provides an anastomat, which comprises the execution mechanism 1 for the anastomat in the embodiment one, further comprises an anastomat body, an extension tube connecting the anastomat body and the execution mechanism 1, and an operation mechanism controlling the action of the execution mechanism 1, wherein the anvil bending part 14 of the execution mechanism 1 can be bent by means of the bending piece 2 in the embodiment two.

[0057] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0058] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "below", "under" and "under" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0059] Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A bending member (2) for bending of a staple anvil bend of a stapler, characterized in that, The bending piece (2) has a anvil bending part (14) which can be inserted into an anvil (13) for bending; The slot comprises a first end (21) which is open, and a first wall (23) and a second wall (24) which are opposite and parallel, the first wall (23) is connected to the first end (21), and the inner sides of the first wall (23) and the second wall (24) form the stress surface of the anvil bending part (14); A bending structure (25) is provided on the first end (21) to provide bending support when the anvil bending part (14) is bent, and the bending structure (25) provides bending support through a bending pivot surface; The bending piece (2) further comprises a retaining structure (26) which can fix the anvil bending part (14) inside the slot, and the retaining structure (26) is provided at the connection between the first wall (23) and the first end (21); The bending piece (2) further comprises a spring arm (27) in a cantilever structure; The fixed end of the spring arm (27) is connected to the second wall (24), and the spring arm (27) is used to abut the anvil bending part (14) against the first wall (23).

2. The bending member (2) for bending of the anastomat staple anvil bend according to claim 1, characterized in that: The length of the second wall (24) extending towards the anvil (13) is less than the length of the first wall (23) extending towards the anvil (13).

3. The bend (2) for bending of the anastomat staple anvil bend as claimed in claim 1, characterized in that: The retaining structure (26) is at least one positioning block provided on the bending structure (25).

4. The bend (2) for bending of the anastomat staple anvil bend of claim 1, characterized in that: The movable end of the spring arm (27) is provided with an abutting part (271) which extends towards the second wall (24) to abut the anvil bending part (14) against the first wall (23).

5. The bend (2) for bending of the anastomat staple anvil bend of claim 1, characterized in that: The first end (21) of the slot extends to the outside of the slot to form an inclined surface which can limit the maximum bending angle; The angle between the inclined surface and the horizontal plane is 35°±5°.

6. The bend (2) for bending of the anastomat staple anvil bend of claim 1, characterized in that: The second end (22) of the bending piece (2) opposite to the first end (21) is provided with an anti-skid part (221).

7. An actuation mechanism for a stapler, characterized by: The anvil (13) of the execution mechanism (1) is integrally formed with an anvil bending part (14) which can be bent around the connection with the anvil (13), and the anvil bending part (14) is inserted into the slot of the bending piece (2) according to any one of claims 1-6; The connection is in a hollow structure (141), and the thickness is at least less than the thickness of the anvil bending part (14).

8. The effector for a stapler of claim 7, wherein: Further comprising a check member (15); The check member (15) is provided on the side wall of the connection of the anvil (13).

9. An anastomat characterized by: The execution mechanism (1) for an anastomat comprises the anvil bending part (14) which can be bent by means of the bending piece (2) according to any one of claims 1-6.

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