Hemostatic clamp

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a hemostatic clip which comprises a sleeve, a clamping assembly, a separating sleeve and a traction assembly, a locking hole and a convex ring are arranged at the rear end of the sleeve, the clamping assembly comprises two clamping arms capable of being opened or closed, and each clamping arm comprises a clamping head and a locking hook used for being matched with the locking hole; the separating sleeve comprises a plurality of clamping jaws which are located at the front end, distributed at intervals in the circumferential direction and used for being matched with the protruding ring in a clamped mode, the middle of the outer wall of each clamping jaw is provided with a recess to form a clamping groove for the protruding ring to be clamped in, and the traction assembly comprises a drag hook detachably connected with the pin shaft. The clamping assembly and the sleeve are fixed through matching of the locking hole and the locking hook, the sleeve and the separating sleeve are detachably connected through matching of the protruding ring and the clamping groove, and the protruding ring and the clamping groove are matched in shape and embedded with each other, so that the connecting strength of the sleeve and the separating sleeve is improved, unexpected separation of the sleeve and the separating sleeve in the operation process is avoided, and the operating efficiency is improved. And the safety of the operation is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a hemostatic clip. Background Art

[0002] A Chinese patent with application number CN201520317758.8 discloses a clip-type reusable opening and closing hemostatic clip, which includes an outer tube component, a clamp and a push-pull component. The outer tube component includes a sleeve and a connector. The tail end of the sleeve is provided with a deformable fixing tooth. The connector is provided with a fixing groove. The deformable fixing tooth of the sleeve is bent inward and clamped in the fixing groove of the connector. When the push-pull component is pulled toward the tail to a certain position relative to the outer tube component, the deformable fixing tooth is restored to a straight state, thereby allowing the deformable fixing tooth to detach from the fixing groove; however, the deformable fixing tooth is in the shape of a thin sheet, and its own structural strength is limited, resulting in a low connection strength between it and the fixing groove, thereby reducing the safety of the surgical procedure. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the problem that in the prior art, a detachable connection is achieved between a sleeve and a connector by the cooperation of a deformable fixing tooth and a fixing groove, but the deformable fixing tooth is in the shape of a thin sheet and its own structural strength is limited, resulting in a low connection strength between it and the fixing groove, a hemostatic clip is now provided.

[0004] The utility model solves the technical problem by adopting a technical solution: a hemostatic clip, comprising:

[0005] The sleeve has a first locking mechanism and a second locking mechanism at its rear end, wherein the first locking mechanism comprises two locking holes opened in the sleeve wall, and the second locking mechanism comprises a convex ring protruding from the inner wall of the sleeve;

[0006] The clamping assembly comprises two clamping arms which can be opened or closed and a pin shaft which is inserted into the two clamping arms, each clamping arm comprises a clamping head which extends forward through a sleeve for clamping tissue and a lock hook which is movably arranged inside the sleeve for cooperating with a locking hole;

[0007] The separation sleeve comprises a plurality of claws located at the front end and spaced apart along the circumferential direction, wherein the middle part of the outer wall of the claw has a depression to form a groove for the convex ring to be clamped into;

[0008] The pulling assembly comprises a draw hook detachably connected to the pin shaft; when the draw hook drives the clamping assembly to move backward, the two clamps gradually close under the constraint of the sleeve, and while the draw hook is separated from the pin shaft, the two locking hooks move away from each other until they are respectively inserted into their corresponding locking holes to fix the clamping assembly and the sleeve; when the draw hook continues to move backward to drive the separation sleeve to move backward, the claws are separated from the convex ring to disengage the separation sleeve from the sleeve;

[0009] Further, a support portion extending axially along the separating sleeve and fitting against the inner wall of the convex ring is provided between two adjacent jaws.

[0010] Further, the hook has one and is located between two clamping arms. The hook has a connection hole for the supply shaft to pass through to connect the two and a notch located at the front end of the hook and communicating with the connection hole.

[0011] Further, a limiting portion for limiting the locking hook of the clamping assembly in the open state inside it to restrict its approach to the locking hole is provided at the rear end of the hook, and it includes two oppositely arranged limiting blocks.

[0012] Further, a limiting step is formed by the convexity of the inner wall at the rear end of the separating sleeve, and a contact block that abuts against the limiting step protrudes radially from the limiting portion.

[0013] Further, the two groove walls of the card slot are inclined and gradually approach each other in the direction from the slot opening to the slot bottom, and the two end faces of the convex ring are also inclined and gradually approach each other in the direction from the slot opening to the slot bottom along the card slot.

[0014] The beneficial effects of the present utility model are as follows: The present utility model realizes the fixation of the clamping assembly and the sleeve by the cooperation of the locking hole and the locking hook, and realizes the separable connection of the sleeve and the separating sleeve by the cooperation of the convex ring and the card slot. The convex ring and the card slot are matched in shape and mutually engaged, thereby improving the connection strength between the sleeve and the separating sleeve, avoiding the unexpected detachment of the two during the operation, and improving the safety of the operation.

[0015] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0018] Figure 2 is a three-dimensional schematic diagram of the present utility model with the sleeve removed;

[0019] Figure 3 is an exploded view of the present utility model;

[0020] Figure 4 is a cross-sectional view of the present utility model from the first perspective;

[0021] Figure 5 is a cross-sectional view of the present utility model from the second perspective;

[0022] Figure 6 is a three-dimensional schematic diagram of the separating sleeve;

[0023] In the figure:

[0024] 1. Sleeve; 101. Locking hole; 102. Convex ring;

[0025] 2. Clamping arm; 201. Chuck; 202. Locking hook;

[0026] 3. Pin shaft;

[0027] 4. Separation sleeve; 401. Claw; 4011. Card slot; 402. Support part; 403. Limit step;

[0028] 5. Pull hook; 501. Connection hole; 502. Notch; 503. Limit block; 504. Abutting block. Detailed implementation mode

[0029] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model. Directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following specific implementation modes are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0030] As Figure 1 and Figure 3 shown, a hemostatic clip includes a sleeve 1, a clamping assembly, a separation sleeve 4 and a pulling assembly:

[0031] A first locking mechanism and a second locking mechanism are provided at the rear end of the sleeve 1. The first locking mechanism includes two locking holes 101 opened on the tube wall of the sleeve 1. The locking holes 101 can be through holes or blind holes penetrating the tube wall in the radial direction. In this embodiment, a through hole is preferably used, which is more convenient for processing. The second locking mechanism includes a convex ring 102 protruding from the inner wall of the sleeve 1;

[0032] The clamping assembly includes two openable or closable clamping arms 2 and a pin shaft 3 passing through the inside of the two clamping arms 2. The clamping arms 2 have elasticity. Each clamping arm 2 includes a chuck 201 extending forward from the sleeve 1 for clamping tissue and a locking hook 202 movably arranged inside the sleeve 1 for cooperating with the locking hole 101. A pin hole for the pin shaft 3 to pass through is provided on the locking hook 202; when the locking hook 202 is disengaged from the locking hole 101, the clamping assembly and the sleeve 1 can move relatively, and when the locking hook 202 is snapped into the locking hook 202, the clamping assembly and the sleeve 1 are relatively fixed;

[0033] The separation sleeve 4 is detachably connected to the sleeve 1 and includes a plurality of claws 401 located at the front end and spaced circumferentially for snap-fitting with the convex ring 102. The middle part of the outer wall of the claw 401 has a depression to form a card slot 4011 for the convex ring 102 to snap into, as Figure 4 shown; when the plurality of claws 401 are snap-fitted with the convex ring 102, the separation sleeve 4 and the sleeve 1 are relatively fixed. When the plurality of claws 401 are elastically deformed by force and move closer to each other to disengage from the convex ring 102, the separation sleeve 4 and the sleeve 1 are disengaged. The claws 401 are spaced apart so that there is a deformation space between adjacent ones, making it easier to generate elastic deformation.

[0034] The pulling assembly includes a hook 5 detachably connected to the pin shaft 3, and the hook 5 can drive the clamping assembly to move forward and backward through the pin shaft 3.

[0035] When the hook 5 drives the clamping assembly to move forward, the two clamping arms 2 move away from each other under their own elastic force, that is, the two clamping arms 2 open.

[0036] When the hook 5 drives the clamping assembly to move backward, the two clamping heads 201 gradually close under the restraint of the sleeve 1 to clamp the tissue. After the pulling force on the hook 5 reaches a predetermined value, it deforms and separates from the pin shaft 3. At the same time, the two locking hooks 202 are released from restraint and move away from each other to respectively snap into their corresponding locking holes 101, realizing the fixation of the clamping assembly and the sleeve 1.

[0037] When the hook 5 continues to move backward and drives the separation sleeve 4 to move backward synchronously, the claws 401 are elastically deformed by force, and the convex ring 102 disengages from the card slot 4011, causing the separation sleeve 4 and the sleeve 1 to disengage, so that the clamping assembly remains in the patient's body. In this embodiment, the card slot 4011 and the convex ring 102 are matched in shape and fit with each other, and there is a high connection strength between the two, avoiding unexpected disengagement between the two during the operation.

[0038] In some examples, as Figure 5 and Figure 6 shown, a support portion 402 extending axially along the separation sleeve 4 and fitting with the inner wall of the convex ring 102 is provided between two adjacent claws 401. There are two claws 401 and they are symmetrically distributed. The support portion 402 provided between them fills part of the deformation space between them, but there is still part of the deformation space for the claws 401 to deform, so as to meet the deformation requirements of the claws 401 while improving the connection strength between the claws 401 and the convex ring 102.

[0039] In some examples, as Figure 2As shown, the hook 5 has one and is located between the two clamping arms 2. The hook 5 has a connecting hole 501 for the supply shaft 3 to pass through to connect the two, and a notch 502 located at the front end of the hook 5 and communicating with the connecting hole 501. The notch 502 can be deformed under the action of a pulling force to disengage the hook 5 from the pin shaft 3.

[0040] In some examples, a limiting portion is provided at the rear end of the hook 5 for limiting the locking hook 202 of the clamping assembly in the open state inside it to restrict its approach to the locking hole 101. It includes two relatively arranged limiting blocks 503, and the two limiting blocks 503 are located outside the two locking hooks 202 and correspond to each other one by one.

[0041] In some examples, a limiting step 403 protrudes from the inner wall of the rear end of the separation sleeve 4. The limiting portion protrudes radially with an abutting block 504 that abuts against the limiting step. When the abutting block 504 abuts against the limiting step, the hook 5 can drive the separation sleeve 4 to move backward synchronously.

[0042] In some examples, the two groove walls of the card slot 4011 are inclined and gradually approach each other along the direction from the slot opening to the slot bottom to form a first inclined surface. The two end faces of the convex ring 102 are also inclined and gradually approach each other along the direction of the card slot 4011 from the slot opening to the slot bottom to form a second inclined surface. The front end of the claw 401 has a third inclined surface. The first inclined surface and the second inclined surface cooperate with each other, and in combination with the third inclined surface, it can play a guiding role during the process of the claw 401 being inserted into or disengaged from the convex ring 102.

[0043] Working principle:

[0044] When the hook 5 drives the clamping assembly to move forward, the two clamping arms 2 move away from each other under their own elastic force, that is, the two clamping arms 2 open.

[0045] When the hook 5 drives the clamping assembly to move backward, the two clamping heads 201 are gradually closed under the constraint of the sleeve 1 to clamp the tissue. After the pulling force received by the hook 5 reaches a predetermined value, it deforms and separates from the pin shaft 3. At the same time, the limiting block 503 disengages from the locking hook 202, and the two locking hooks 202 are no longer constrained and move away from each other until they are respectively inserted into their corresponding locking holes 101, realizing the fixation of the clamping assembly and the sleeve 1.

[0046] When the hook 5 continues to move backward until the abutting block 504 abuts against the limiting step, it can drive the separation sleeve 4 to move backward synchronously. The claw 401 is elastically deformed by the force and separates from the convex ring 102 to disengage the separation sleeve 4 from the sleeve 1, so that the clamping assembly remains in the patient's body.

[0047] Based on the inspiration of the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hemostatic clip, comprising: A sleeve (1) having a first locking mechanism and a second locking mechanism at its rear end. The first locking mechanism includes two locking holes (101) formed in the wall of the sleeve (1), and the second locking mechanism includes a convex ring (102) protruding from the inner wall of the sleeve (1); A clamping assembly, including two clamp arms (2) that can be opened or closed and a pin shaft (3) passing through the two clamp arms (2). Each clamp arm (2) includes a clamping head (201) extending forward from the sleeve (1) for clamping tissue and a locking hook (202) movably disposed inside the sleeve (1) for cooperating with the locking hole (101); A separating sleeve (4) detachably connected to the sleeve (1), including a plurality of claws (401) located at the front end and spaced circumferentially. The claws (401) are provided with a slot (4011) for the convex ring (102) to snap into; A pulling assembly, including a hook (5) detachably connected to the pin shaft (3); when the hook (5) drives the clamping assembly to move backward, the two clamping heads (201) gradually close under the constraint of the sleeve (1). At the same time when the hook (5) separates from the pin shaft (3), the two locking hooks (202) move away from each other until they respectively snap into their corresponding locking holes (101) to fix the clamping assembly to the sleeve (1); when the hook (5) continues to move backward to drive the separating sleeve (4) to move backward, the claws (401) separate from the convex ring (102) to disconnect the separating sleeve (4) from the sleeve (1).

2. The hemostatic clip according to claim 1, wherein: A support portion (402) extending axially along the separating sleeve (4) and fitting against the inner wall of the convex ring (102) is provided between two adjacent claws (401).

3. The hemostatic clip according to claim 1, characterized in that: The hook (5) has one and is located between the two clamp arms (2). The hook (5) has a connection hole (501) for the pin shaft (3) to pass through to connect the two, and a notch (502) located at the front end of the hook (5) and communicating with the connection hole (501).

4. The hemostatic clip according to claim 1, wherein: A limiting portion for limiting the locking hook (202) of the clamping assembly in the open state inside it to prevent it from approaching the locking hole (101) is provided at the rear end of the hook (5), and it includes two oppositely arranged limiting blocks (503).

5. The hemostatic clip according to claim 4, wherein: A limiting step (403) protrudes from the inner wall of the rear end of the separating sleeve (4), and an abutting block (504) protruding radially from the limiting portion abuts against the limiting step (403).

6. The hemostatic clip according to claim 1, wherein: The two groove walls of the slot (4011) are inclined and gradually approach each other in the direction from the slot opening to the slot bottom, and the two end faces of the convex ring (102) are also inclined and gradually approach each other in the direction from the slot opening of the slot (4011) to the slot bottom.

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