A clip-applying surgical forceps

Abstract

The invention discloses a clamping surgical forceps provided by the invention, comprising a fixed handle and a movable handle, wherein the fixed handle and the movable handle are connected via a rotating shaft, a spring is arranged in the mounting cavity of the fixed handle, one end of the spring abuts against the bottom of the mounting cavity, and the other end abuts against the movable handle; a limit rod for limiting the rotation range of the movable handle and an adjusting component for adjusting and fixing the position of the limit rod are arranged in the fixed handle, the limit rod is rotatably connected to the fixed handle; the limit rod comprises a limit rod body and a limit claw connected to the limit rod body, the movable handle is provided with an extension claw for limiting the position by clamping engagement with the limit claw, when the limit rod is in the limiting position, the extension claw is clamped engagement with the limit claw to limit the movable handle from continuing to rotate; when the limit rod is in the non-limiting position, the limit claw is not on the movement trajectory of the extension claw; the limitation on the closing degree of the jaws is achieved, the problem of relying on the operator's experience to control the closing angle during the conveying process is solved, and the misoperation of the jaws closing and fastening the tissue clamp during the conveying process is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, and more particularly to a pair of clip-applying surgical forceps. Background Art

[0002] In surgical operations, clip appliers are used to grasp disposable tissue clips, accurately deliver the tissue clips to the surgical site, and then fasten the combination clips.

[0003] The working principle of the clip applier is that the handle drives the jaws to open and close through a transmission mechanism. In a natural state, the clip applier surgical forceps and the jaws remain open under the action of an internal spring to clamp the tissue clip.

[0004] However, during the delivery of the tissue clip, since the clip applier cannot pass through the trocar in the open state, the clip applier surgical forceps need to be gripped to partially close the jaws so as to pass through the trocar without fastening the tissue clip. In this process, the degree of closing of the jaws is controlled by the operator based on experience, which can easily lead to operator fatigue and cause human errors.

[0005] In summary, how to control the degree of closure of the clip applier during the process of transporting the tissue clip is a problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a clip-applying surgical forceps which can control the closing angle, thereby solving the problem of the operator controlling the closing angle based on experience and avoiding the occurrence of misoperation.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A clip-applying surgical forceps comprises a fixed handle and a movable handle, wherein the fixed handle and the movable handle are connected via a rotating shaft, a spring is arranged in a mounting cavity of the fixed handle, one end of the spring abuts against the bottom of the mounting cavity, and the other end abuts against the movable handle;

[0009] The fixed handle is provided with a limit rod for limiting the rotation range of the movable handle and an adjustment component for adjusting and fixing the position of the limit rod, the limit rod comprises a limit rod body and a limit claw connected to the limit rod body, and the movable handle is provided with an extension claw for engaging and limiting the limit claw;

[0010] When the limiting rod is at the limiting position, the extending claw is engaged with the limiting claw to limit the movable handle from further rotation;

[0011] When the limiting rod is located at the non-limiting position, the limiting claw is not on the movement track of the extending claw.

[0012] Preferably, the limit rod is rotatably connected to the fixed handle, and the adjustment assembly includes a resistance spring ball assembly and a switch wrench assembly, and the resistance spring ball assembly and the switch wrench assembly are both arranged on the fixed handle;

[0013] One end of the resisting spring ball assembly is fixed on the fixed handle, and the other end is in contact with the end surface of the limiting rod body away from the movable handle;

[0014] The switch wrench assembly is rotatably connected to the fixed handle and abuts against an end surface of the limiting rod body close to the movable handle.

[0015] Preferably, the switch wrench assembly comprises a limit block and a wrench, the limit block is connected to the wrench via a limit block shaft, and the limit block is located in an area surrounded by the limit claw, the end surface of the limit rod body close to the movable handle, and the inner wall surface of the fixed handle;

[0016] The wrench is arranged on the surface of the fixed handle so that the limiting block can be driven to rotate by turning the wrench.

[0017] Preferably, the limiting block is a rectangular block, and when the limiting rod is located at the limiting position, the long side of the rectangular block abuts against the limiting rod body;

[0018] When the limiting rod is located at the non-limiting position, the short side of the rectangular block abuts against the limiting rod body.

[0019] Preferably, the limiting claw protrudes from the surface of the limiting rod body, and the limiting claw is vertically connected to the limiting rod body.

[0020] Preferably, an upper end surface of the limiting rod body away from the movable handle is provided with an inclined limiting surface, and when the limiting rod is located at the limiting position, the inclined limiting surface abuts against the inner wall surface of the fixed handle;

[0021] When the limiting rod is located at the non-limiting position, the end surface of the limiting rod body away from the movable handle abuts against the inner wall surface of the fixed handle.

[0022] Preferably, one of the limiting claw and the extending claw is provided with a limiting opening, and the other is provided with a protrusion matching with the limiting opening.

[0023] Preferably, the limiting claw and the extending claw are both arc-shaped opening claws.

[0024] The clamping surgical forceps provided by the present invention include a fixed handle and a movable handle, which are connected by a rotating shaft, and a spring is provided in the installation cavity of the fixed handle, one end of the spring abuts against the bottom of the installation cavity, and the other end abuts against the movable handle; a limit rod for limiting the rotation range of the movable handle and an adjustment component for adjusting and fixing the position of the limit rod are provided in the fixed handle, and the limit rod is rotatably connected to the fixed handle; the limit rod includes a limit rod body and a limit claw connected to the limit rod body, and an extension claw that is engaged with the limit claw for limiting the position is provided on the movable handle, and when the limit rod is in the limiting position, the extension claw is engaged with the limit claw to limit the movable handle from continuing to rotate; when the limit rod is in the non-limiting position, the limit claw is not on the movement trajectory of the extension claw.

[0025] In the natural state, the movable handle and the fixed handle are kept in the open state due to the elastic restoring force of the spring; when the tissue clamp needs to be delivered, the limit rod is fixed in the limit position by using the adjustment component, and the user clamps the clamp to make the movable handle rotate in the direction close to the fixed handle until the extended claw abuts against the limit claw, thereby limiting the further movement of the movable handle; after delivery to the surgical site, the limit rod is fixed in the non-limiting position by using the adjustment component, at which time the limit claw is not on the movement trajectory of the extended claw, and the movable handle can be rotated in the direction close to the fixed handle to close the jaws, thereby fastening the tissue clamp.

[0026] Therefore, by setting a limit rod and an adjustment component, the clamping surgical forceps provided by the present invention achieves a limit on the degree of closure of the jaws, solves the problem in the prior art that the closing angle depends on the operator's experience in the process of transporting the tissue clamp, and avoids the erroneous operation of closing the jaws to tighten the tissue clamp during the transport process.

[0027] At the same time, by changing the position of the limit rod on the fixed handle and the length of the limit rod, the rotation range of the movable handle in the limited state can be adjusted, and it can be applicable to various types of tissue clamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of a specific embodiment of the clip applying surgical forceps provided by the present invention;

[0030] Figure 2 for Figure 1 A partial enlarged view of the clip-applying surgical forceps in a limited position state;

[0031] Figure 3 for Figure 1 A schematic diagram of the movement of the handle of the clip applicator when holding the surgical forceps;

[0032] Figure 4 for Figure 1 A partial enlarged view of the clip-applying surgical forceps in a non-restricted state;

[0033] Figure 5 for Figure 1 Schematic diagram of the movement of the wrench when the clip applicator forceps is held.

[0034] Figure 1-Figure 5 middle:

[0035] 1 is a movable handle, 11 is an extension claw, 2 is a fixed handle, 3 is a rotating shaft, 4 is a spring, 5 is a limit rod, 51 is a limit claw, 52 is a limit rod body, 521 is an inclined limit surface, 6 is a resistance spring ball assembly, 7 is a switch wrench assembly, 71 is a limit block, 72 is a wrench, a1 and a2 are the positions of the movable handle during holding the movable handle 1, b1 is the position of the limit block in the limit state, b2 is the position of the limit block in the non-limit state, c1 is the position of the wrench in the limit state, and c2 is the position of the wrench in the non-limit state. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The core of the present invention is to provide a clip-applying surgical forceps which can control the closing angle, thereby solving the problem of the operator controlling the closing angle based on experience and avoiding the occurrence of misoperation.

[0038] Please refer to Figure 1-Figure 5 , Figure 1 A schematic structural diagram of a specific embodiment of the clip applying surgical forceps provided by the present invention; Figure 2 for Figure 1 A partial enlarged view of the clip-applying surgical forceps in a limited position state; Figure 3 for Figure 1 A schematic diagram of the movement of the handle of the clip applicator when holding the surgical forceps; Figure 4 for Figure 1 A partial enlarged view of the clip-applying surgical forceps in a non-restricted state; Figure 5 for Figure 1 Schematic diagram of the movement of the wrench when the clip applicator forceps is held.

[0039] Figure 3a1 and a2 are the positions of the movable handle 1 during the process of holding the movable handle 1; Figure 2 b1 is the position of the limit block 71 in the limit state, Figure 4 b2 in the figure is the position of the limit block 71 in the non-limiting state; Figure 5 c1 in the figure is the position of the wrench 72 in the limit state. Figure 4 c2 in FIG. 7 is the position of the wrench 72 in the non-limiting state.

[0040] The clamping surgical forceps provided by the present invention include a fixed handle 2 and a movable handle 1, which are connected by a rotating shaft 3. A spring 4 is provided in the installation cavity of the fixed handle 2, one end of the spring 4 abuts against the bottom of the installation cavity, and the other end abuts against the movable handle 1; a limit rod 5 for limiting the rotation range of the movable handle 1 and an adjustment component for adjusting and fixing the position of the limit rod 5 are provided in the fixed handle 2, the limit rod 5 includes a limit rod body 52 and a limit claw 51 connected to the limit rod body 52, and an extension claw 11 that is engaged with the limit claw 51 for limiting the position is provided on the movable handle 1; when the limit rod 5 is in the limited position, the extension claw 11 is engaged with the limit claw 51 to limit the movable handle 1 from continuing to rotate; when the limit rod 5 is in the non-limited position, the limit claw 51 is not on the movement trajectory of the extension claw 11.

[0041] The limiting rod 5 limits the movable handle 1 from further rotating in the direction of approaching the fixed handle 2 by means of the clamping cooperation between the limiting claw 51 and the extending claw 11 .

[0042] The limiting claw 51 is connected to the limiting rod body 52. ​​The length of the limiting claw 51 extending from the end face of the limiting rod body 52 and the angle between the axis of the limiting claw 51 and the limiting rod body 52 are both related to the rotation angle range of the movable handle 1 in the limiting state, and need to be set according to actual production needs.

[0043] Preferably, please refer to Figure 1 , a limiting claw 51 can be provided to protrude from the surface of the limiting rod body 52 , and the limiting claw 51 is vertically connected to the limiting rod body 52 .

[0044] The limiting claw 51 and the extending claw 11 are snap-fitted together. Preferably, one of the limiting claw 51 and the extending claw 11 is provided with a limiting opening, and the other is provided with a protrusion that matches with the limiting opening.

[0045] Considering that the movement trajectory of the extension claw 11 is an arc when the movable handle 1 rotates, preferably, the limiting claw 51 and the extension claw 11 are both arc-shaped bayonet claws, so the contact surface of the limiting claw 51 and the extension claw 11 is an arc surface, which facilitates the snap-fitting between the two.

[0046] The adjustment component is used to adjust and fix the position of the limit rod 5 on the fixed handle 2. According to the different connection methods between the limit rod 5 and the fixed handle 2, the specific structure of the adjustment component is different.

[0047] When the limit rod 5 is slidably connected to the fixed handle 2 through a slide groove of a certain length, the adjustment component can be a positioning block that cooperates with the slide groove. The sum of the length of the positioning block and the length of the sliding block used by the limit rod 5 to engage with the slide groove on the fixed handle 2 is equal to the length of the slide groove. Therefore, the limit rod 5 can be fixed at the positions at both ends of the slide groove through the positioning blocks.

[0048] Preferably, please refer to Figure 1-Figure 4 The limit rod 5 is rotatably connected to the fixed handle 2, and the adjustment assembly includes a resistance spring ball assembly 6 and a switch wrench assembly 7, both of which are arranged on the fixed handle 2; one end of the resistance spring ball assembly 6 is fixed to the fixed handle 2, and the other end abuts against the end surface of the limit rod body 52 away from the movable handle 1; the switch wrench assembly 7 is rotatably connected to the fixed handle 2, and abuts against the end surface of the limit rod body 52 close to the movable handle 1.

[0049] The resistance spring ball assembly 6 comprises an adjusting spring, one end of which is fixed to the inner wall surface of the fixed handle 2, and the other end is provided with a round ball abutting against the limit rod body 52. ​​During installation, a certain pre-pressure is applied to the adjusting spring.

[0050] Therefore, in the limited state, the spring ball assembly 6 has an elastic restoring force on the limit rod body 52 pointing to the direction of the movable handle 1, so that the limit rod 5 is abutted against the switch wrench assembly 7, thereby preventing the limit rod 5 from rebounding.

[0051] The switch wrench assembly 7 is rotatably connected to the fixed handle 2 and abuts against the end surface of the limit rod body 52 close to the movable handle 1. Therefore, when the switch wrench assembly 7 rotates, the contact surface between it and the limit rod body 52 changes, thereby changing the position of the limit rod body 52 relative to the fixed handle 2.

[0052] Preferably, please refer to Figure 2 and Figure 4 The switch wrench assembly 7 may include a limit block 71 and a wrench 72. The limit block 71 and the wrench 72 are connected via a limit block shaft. The limit block 71 is located in an area surrounded by the limit claw 51, the end surface of the limit rod body 52 close to the movable handle 1, and the inner wall surface of the fixed handle 2; the wrench 72 is arranged on the surface of the fixed handle 2 so that the limit block 71 can be driven to rotate by pulling the wrench 72.

[0053] like Figure 2 , Figure 4 and Figure 5As shown, in the limiting state, the wrench 72 is located at the c1 position, at this time the limiting block 71 is located at the b1 position, and the limiting claw 51 of the limiting rod 5 is located on the movement trajectory of the extending claw 11; the wrench 72 is pushed downward to the c2 position, and the wrench 72 drives the limiting block to move to the b2 position. At this time, the limiting claw 51 of the limiting rod 5 is not on the movement trajectory of the extending claw 11, the limiting rod 5 is in the non-limiting state, and the movable handle 1 can be closed freely.

[0054] Preferably, the limit block 71 can be a rectangular block. When the limit rod 5 is in the limit position, the long side of the rectangular block abuts against the limit rod body 52; when the limit rod 5 is in the non-limit position, the short side of the rectangular block abuts against the limit rod body 52.

[0055] Of course, the limit block 71 may also be replaced by other structures with similar functions, such as a cam and an eccentric wheel.

[0056] In the natural state, the movable handle 1 and the fixed handle 2 are kept in the open state due to the elastic restoring force of the spring 4; when the tissue clamp needs to be transported, the limiting rod 5 is fixed in the limiting position by the adjusting component, and the user clamps the clamp to make the movable handle 1 rotate toward the fixed handle 2 until the extending claw 11 abuts against the limiting claw 51, thereby limiting the further movement of the movable handle 1; after being transported to the surgical site, the limiting rod 5 is fixed in the non-limiting position by the adjusting component, and the limiting claw 51 is not on the movement trajectory of the extending claw 11, and the movable handle 1 can continue to rotate toward the fixed handle 2 to close the jaws, thereby fastening the tissue clamp.

[0057] In this embodiment, by providing a limit rod 5 and an adjustment assembly, the degree of closing of the jaws is limited, which solves the problem in the prior art that the closing angle is controlled by the operator's experience during the transportation of the tissue clamp, and avoids the erroneous operation of the jaws closing and fastening the tissue clamp during the transportation process.

[0058] At the same time, by changing the position of the limiting rod 5 on the fixed handle 2 and the length of the limiting rod 5, the rotation range of the movable handle 1 in the limited state can be adjusted, which can be applicable to various types of tissue clips.

[0059] Preferably, an oblique limiting surface 521 is provided on the upper end surface of the limiting rod body 52 away from the movable handle 1. When the limiting rod 5 is in the limiting position, the oblique limiting surface 521 abuts against the inner wall surface of the fixed handle 2; when the limiting rod 5 is in the non-limiting position, the end surface of the limiting rod body 52 away from the movable handle 1 abuts against the inner wall surface of the fixed handle 2. Therefore, in the limiting position state, the limiting rod 5 is in surface contact with the inner wall surface of the fixed handle 2, and compared with point contact, the structure is more stable and not easy to lose stability.

[0060] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] The above is a detailed introduction to the clip-applying surgical forceps provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A clip-applying surgical forceps, comprising a fixed handle (2) and a movable handle (1), wherein the fixed handle (2) and the movable handle (1) are connected via a rotating shaft (3), characterized in that: A spring (4) is provided in the installation cavity of the fixed handle (2), one end of the spring (4) abuts against the bottom of the installation cavity, and the other end abuts against the movable handle (1); The fixed handle (2) is provided with a limit rod (5) for limiting the rotation range of the movable handle (1) and an adjustment component for adjusting and fixing the position of the limit rod (5); the limit rod (5) comprises a limit rod body (52) and a limit claw (51) connected to the limit rod body (52); the movable handle (1) is provided with an extension claw (11) for engaging and limiting the limit claw (51) in a clamping manner; When the limiting rod (5) is located at the limiting position, the extending claw (11) engages with the limiting claw (51) to limit the movable handle (1) from further rotation; When the limiting rod (5) is located at the non-limiting position, the limiting claw (51) is not on the movement track of the extending claw (11); The limit rod (5) is rotatably connected to the fixed handle (2); the adjustment assembly comprises a resistance spring ball assembly (6) and a switch wrench assembly (7); and the resistance spring ball assembly (6) and the switch wrench assembly (7) are both arranged on the fixed handle (2); One end of the resisting spring ball assembly (6) is fixed on the fixed handle (2), and the other end is in contact with the end surface of the limiting rod body (52) away from the movable handle (1); The switch wrench assembly (7) is rotatably connected to the fixed handle (2) and abuts against the end surface of the limit rod body (52) close to the movable handle (1); The switch wrench assembly (7) comprises a limit block (71) and a wrench (72), wherein the limit block (71) and the wrench (72) are connected via a limit block shaft, and the limit block (71) is located in an area surrounded by the limit claw (51), the end surface of the limit rod body (52) close to the movable handle (1), and the inner wall surface of the fixed handle (2); The wrench (72) is arranged on the surface of the fixed handle (2), so that the limiting block (71) can be driven to rotate by turning the wrench (72).

2. The clip applier surgical forceps according to claim 1, characterized in that: The limiting block (71) is a rectangular block, and when the limiting rod (5) is located at the limiting position, the long side of the rectangular block abuts against the limiting rod body (52); When the limiting rod (5) is located at a non-limiting position, the short side of the rectangular block abuts against the limiting rod body (52).

3. The clip applying surgical forceps according to any one of claims 1 to 2, characterized in that: The limiting claw (51) protrudes from the surface of the limiting rod body (52), and the limiting claw (51) is vertically connected to the limiting rod body (52).

4. The clip applier surgical forceps according to claim 3, characterized in that: An upper end surface of the limiting rod body (52) away from the movable handle (1) is provided with an inclined limiting surface (521); when the limiting rod (5) is located at the limiting position, the inclined limiting surface (521) abuts against the inner wall surface of the fixed handle (2); When the limiting rod (5) is located at a non-limiting position, the end surface of the limiting rod body (52) away from the movable handle (1) abuts against the inner wall surface of the fixed handle (2).

5. The clip applier surgical forceps according to any one of claims 1 to 2, characterized in that: One of the limiting claw (51) and the extending claw (11) is provided with a limiting opening, and the other is provided with a protrusion that matches the limiting opening.

6. The clip applier surgical forceps according to claim 5, characterized in that: The limiting claw (51) and the extending claw (11) are both arc-shaped opening claws.

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