Hemostatic clip for endoscope

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a hemostatic clip for an endoscope, which comprises an outer tube, a hemostatic clip body, a push-pull component and a transition sleeve, a locking groove and a clamping groove are arranged at the rear end of the outer tube, and the hemostatic clip comprises two clip pieces which can be close to or far away from each other. Each clamping piece comprises a clamping section located at the front end and a control section located at the rear end, each control section is provided with a lock hook matched with the corresponding locking groove, the push-pull assembly comprises a pull rod detachably connected with the hemostatic clip body, and the transition sleeve is detachably connected with the outer tube and comprises a clamping hook located at the front end and used for being matched with the corresponding clamping groove. According to the utility model, the locking hook is matched with the locking groove to fix the hemostatic clip body and the outer tube to realize primary release, then the clamping hook is detachably connected with the clamping groove to realize separation of the transition sleeve and the outer tube to realize secondary release, and the clamping hook and the clamping groove are embedded, so that the clamping hook and the clamping groove have higher connection strength when being connected; and under the stress condition, rapid separation can be realized, so that the risk in the operation process is reduced.

Description

Technical Field

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

[0002] Hemostatic clips are generally used in conjunction with endoscopes. After reaching the target with the help of the endoscope, the push-pull assembly drives the two clips to close to clamp the tissue, and the clips clamped by the tissue are released in the patient's body to promote wound closure. The release of the clip generally requires two processes. The first is the separation of the push-pull assembly from the clip, which is the primary release. The second is the separation between the push-pull assembly and the outer tube that accommodates the clip, which is the secondary release. The secondary release is generally achieved by the push-pull assembly pulling the transition sleeve connected to the rear end of the outer tube, so that the transition sleeve is separated from the outer tube and the push-pull assembly is separated from the clip at the same time.

[0003] In the prior art, a detachable connection is generally achieved by bending a spring sheet formed at the rear end of the outer tube and cooperating with a slot on the transition sleeve. However, the spring sheet is in sheet shape, and its cooperation with the slot is approximately linear contact. Therefore, the connection strength between the two is not high, which may cause unexpected detachment or skewness between the outer tube and the transition sleeve, increasing the risk during the operation. Utility Model Content

[0004] 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 generally achieved by matching a spring sheet formed by bending at the rear end of the outer tube with a slot on a transition sleeve, but the matching of the spring sheet and the slot is approximately in line contact, so the connection strength between the two is not high, resulting in the outer tube and the transition sleeve possibly being unexpectedly separated or skewed, increasing the risk during the operation, a hemostatic clip for an endoscope is now provided.

[0005] The utility model solves the technical problem by adopting a technical solution: a hemostatic clip for an endoscope, comprising:

[0006] The outer tube has a locking groove and a clamping groove which penetrate the tube wall in the radial direction at the rear end;

[0007] The hemostatic clip body is movably disposed inside the outer tube, and includes two clips that can move closer to or farther from each other, each clip includes a clamping section at the front end and a control section at the rear end, a connecting piece is provided between the two control sections to connect the two sections, and each control section is provided with a locking hook that cooperates with the locking groove;

[0008] A push-pull assembly, comprising a pull rod detachably connected to the hemostatic clip body, wherein when the two are connected, the pull rod can drive the hemostatic clip body to move forward and backward to realize the opening or closing of the hemostatic clip body, and when the two are separated, the two control sections gradually move away from each other and the two locking hooks are respectively inserted into their corresponding locking grooves to fix the hemostatic clip body to the outer tube;

[0009] The transition sleeve is detachably connected to the outer tube, including a hook at the front end for cooperating with the slot, and the hook can be gradually deformed to disengage from the slot under the pulling force of the push-pull assembly to separate the transition sleeve from the outer tube;

[0010] Furthermore, the hook includes an extension section extending axially along the transition sleeve and a protrusion located at the front end of the extension section and protruding radially for engaging with the slot.

[0011] Furthermore, the thickness of the extension section is smaller than the thickness of the transition sleeve, and a step is formed between the two.

[0012] Furthermore, the connecting member is a pin inserted into the two control sections, and the axial direction of the pin intersects with the axial direction of the outer tube.

[0013] Furthermore, the pull rods have two and the two pull rods are located between the two clips, each pull rod includes a rod portion and a hook portion located at the front end of the rod portion and having a notch, and the notches of the two hook portions are in opposite directions.

[0014] Furthermore, the push-pull assembly also includes two symmetrically arranged blocking wings extending along the axial direction, the two blocking wings are located on both sides of the two control sections and correspond one-to-one to the two locking hooks, and each blocking wing is used to prevent the corresponding locking hook from approaching the locking groove.

[0015] Furthermore, a connecting portion is provided between the two blocking wings, and the connecting portion has abutting wings protruding radially to abut against the step.

[0016] The beneficial effects of the utility model are as follows: the utility model firstly utilizes the cooperation of the locking hook and the locking groove to fix the hemostatic clip body and the outer tube to achieve a primary release, and then utilizes the detachable connection between the hook and the groove to separate the transition sleeve from the outer tube for a secondary release; the hook and the groove are interlocking, and the two have a high connection strength when connected, and can be quickly separated under stress, thereby reducing the risk of the surgical process.

[0017] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0020] Figure 2 It is a three-dimensional schematic diagram of the utility model without the outer tube;

[0021] Figure 3 It is a cross-sectional view of the utility model;

[0022] Figure 4 It is an exploded view of the utility model;

[0023] In the figure:

[0024] 1. outer tube; 101. locking groove; 102. card slot;

[0025] 2. Clip; 201. Clamping section; 202. Control section; 2021. Lock hook;

[0026] 3. pull rod; 301. rod portion; 302. hook portion; 3021. notch; 303. blocking wing; 304. abutting wing;

[0027] 4. transition sleeve; 401. hook; 4011. extension section; 4012. protrusion; 402. step;

[0028] 5. Latch. DETAILED DESCRIPTION

[0029] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter for which protection is sought is limited only by the attached claims and their equivalents.

[0030] like Figure 1 and Figure 2 As shown, a hemostatic clip for endoscope includes an outer tube 1, a hemostatic clip body, a push-pull assembly and a transition sleeve 4;

[0031] The outer tube 1 has a locking groove 101 and a clamping groove 102 at the rear end thereof which penetrate the tube wall in the radial direction;

[0032] The hemostatic clip body is movably arranged inside the outer tube 1, and includes two clips 2 that can move closer to or farther from each other. Each clip 2 includes a clamping section 201 at the front end and a control section 202 at the rear end. The clamping section 201 extends forward from the cavity for clamping tissue. A connecting piece for connecting the two control sections 202 is provided between the two control sections 202, and each control section 202 is provided with a locking hook 2021 that cooperates with the locking groove 101. The number of the locking grooves 101 corresponds to the number of the locking hooks 2021, which is also two, and the two correspond one to one. Each locking hook 2021 is embedded in the corresponding locking groove 101.

[0033] The push-pull assembly includes a pull rod 3 detachably connected to the hemostatic clip body. When the two are connected, the pull rod 3 can drive the hemostatic clip body to move forward and backward to open or close the hemostatic clip body. When the two are separated, the two control sections 202 gradually move away from each other and the two locking hooks 2021 are respectively inserted into their corresponding locking grooves 101 to fix the hemostatic clip body to the outer tube 1.

[0034] The transition sleeve 4 is detachably connected to the outer tube 1 and includes a hook 401 at the front end for cooperating with the slot 102. The hook 401 can be gradually deformed to disengage from the slot 102 under the pulling force of the push-pull assembly to separate the transition sleeve 4 from the outer tube 1.

[0035] When the pull rod 3 drives the hemostatic clip body to move backward, the outer tube 1 forces the two clips 2 to move closer to each other to clamp the tissue. After the tension on the pull rod 3 reaches a critical value, the pull rod 3 separates from the hemostatic clip body to achieve a release. At the same time, the locking hooks 2021 on the two clips 2 move away from each other and embed into their corresponding locking grooves 101 to lock the hemostatic clip body and the outer tube 1; then the pull rod 3 continues to move backward to drive the transition sleeve 4 to move backward synchronously, and the hook 401 is gradually deformed under force to disengage from the groove 102 to separate the transition sleeve 4 from the outer tube 1 to achieve a secondary release. The hook 401 and the groove 102 are interlocking, and the two have a high connection strength when connected, and can be quickly separated under force, thereby reducing the risk of the surgical procedure.

[0036] When the pull rod 3 drives the hemostatic clip body to move forward, the two clips 2 can move away from each other under the action of their own elastic force to loosen the clamped tissue, thereby achieving repeated opening and closing of the hemostatic clip body.

[0037] In some examples, such as Figure 3 and Figure 4 As shown, the hook 401 includes an extension section 4011 extending axially along the transition sleeve 4 and a protrusion 4012 located at the front end of the extension section 4011 and protruding radially for snapping into the slot 102. In this embodiment, there are two hooks 401 and they are symmetrically distributed, and there are also two slots 102 and they are symmetrically distributed. The two hooks 401 correspond to the two slots 102 one by one and each hook 401 is snapped into its corresponding slot 102.

[0038] In some examples, the thickness of the extension section 4011 is smaller than the thickness of the transition sleeve 4, which is conducive to the elastic deformation of the hook 401 under the action of the push-pull assembly, and a step 402 is formed between the inner wall of the extension section 4011 and the inner wall of the transition sleeve 4. When the pull rod 3 abuts against the step 402, the transition sleeve 4 can be driven to move synchronously, thereby applying force to the hook 401 to cause it to deform elastically.

[0039] In some examples, the connecting member is a pin 5 inserted into two control sections 202, and a pin hole is provided on the control section 202 for the pin 5 to pass through. The axial direction of the pin 5 intersects with the axial direction of the outer tube 1, and at least one end of the pin 5 protrudes radially to form a limiting portion, and the cross-sectional area of ​​the limiting portion is larger than the cross-sectional area of ​​the pin hole to prevent the pin 5 from detaching from the clip 2.

[0040] In some examples, such as Figure 4 As shown, the pull rod 3 has two pull rods 3 and the two pull rods 3 are located between the two clips 2. Each pull rod 3 includes a rod portion 301 and a hook portion 302 located at the front end of the rod portion 301. The hook portion 302 is bent and formed, and a center hole for the pin to pass through is formed in the center portion thereof, and a notch 3021 connected to the center hole is formed between the head end and the tail end of the hook portion 302. The hook portion 302 can be deformed through the notch 3021 to achieve a detachable connection with the pin, and the notches 3021 of the two hook portions 302 are in opposite directions to improve the connection strength with the pin.

[0041] In some examples, the push-pull assembly also includes two symmetrically arranged blocking wings 303 extending along the axial direction, the blocking wings 303 are located at the front end of the rod 301, the two blocking wings 303 are located on both sides of the two control sections 202 and correspond one-to-one to the two locking hooks 2021, and each blocking wing 303 is used to block the corresponding locking hook 2021 from approaching the locking groove 101; when the push-pull assembly is connected to the hemostatic clip body, the two blocking wings 303 force the two locking hooks 2021 to approach each other, and when the push-pull assembly is separated from the hemostatic clip body, the blocking wings 303 release the constraints on the locking hooks 2021, and the locking hooks 2021 can move away from each other under the action of their own elastic force until they are embedded in the locking groove 101.

[0042] In some examples, a connection portion is provided between the two blocking wings 303, and the connection portion has abutment wings 304 protruding radially and abutting against the step 402. When the push-pull assembly continues to move backward until the abutment wings 304 abut against the step 402, the transition sleeve 4 can be driven to move backward synchronously.

[0043] Working principle:

[0044] When the pull rod 3 drives the hemostatic clip body to move backward, the outer tube 1 forces the two clips 2 to move closer to each other to clamp the tissue. After the pulling force on the pull rod 3 reaches the critical value, the pull rod 3 separates from the hemostatic clip body to achieve a release. At the same time, the locking hooks 2021 on the two clips 2 move away from each other and embed into their corresponding locking grooves 101 to lock the hemostatic clip body and the outer tube 1; then the pull rod 3 continues to move backward until the abutting wing 304 abuts against the step 402, which can drive the transition sleeve 4 to move backward synchronously. The hook 401 is gradually deformed under force until it disengages from the groove 102 to separate the transition sleeve 4 from the outer tube 1 to achieve a secondary release.

[0045] When the pull rod 3 drives the hemostatic clip body to move forward, the two clips 2 can move away from each other under the action of their own elastic force to loosen the clamped tissue, thereby achieving repeated opening and closing of the hemostatic clip body.

[0046] The above-mentioned ideal embodiments of the utility model are inspirations. Through the above-mentioned description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hemostatic clip for an endoscope, characterized in that: include: The outer tube (1) has a locking groove (101) and a clamping groove (102) at the rear end thereof which penetrate the tube wall in a radial direction; A hemostatic clip body, which is movably arranged inside the outer tube (1), comprises two clips (2) which can move closer to or farther from each other, each clip (2) comprises a clamping section (201) located at the front end and a control section (202) located at the rear end, a connecting piece for connecting the two control sections (202) is provided between the two control sections (202), and each control section (202) is provided with a locking hook (2021) which cooperates with the locking groove (101); A push-pull assembly, comprising a pull rod (3) detachably connected to the hemostatic clip body, wherein when the two are connected, the pull rod (3) can drive the hemostatic clip body to move forward and backward to achieve opening or closing of the hemostatic clip body, and when the two are separated, the two control sections (202) gradually move away from each other and the two locking hooks (2021) are respectively inserted into their corresponding locking grooves (101) to fix the hemostatic clip body to the outer tube (1); The transition sleeve (4) is detachably connected to the outer tube (1), and comprises a hook (401) located at the front end for cooperating with the slot (102), and the hook (401) can be gradually deformed to be disengaged from the slot (102) under the pulling force of the push-pull assembly to separate the transition sleeve (4) from the outer tube (1).

2. A hemostatic clip for endoscope according to claim 1, characterized in that: The hook (401) comprises an extension section (4011) extending axially along the transition sleeve (4) and a protruding portion (4012) located at the front end of the extension section (4011) and protruding radially for being engaged with the slot (102).

3. A hemostatic clip for endoscope according to claim 2, characterized in that: The thickness of the extension section (4011) is smaller than the thickness of the transition sleeve (4), and a step (402) is formed between the two.

4. The hemostatic clip for endoscope according to claim 1, characterized in that: The connecting member is a latch pin (5) inserted into the two control sections (202), and the axial direction of the latch pin (5) intersects with the axial direction of the outer tube (1).

5. The hemostatic clip for endoscope according to claim 1, characterized in that: The pull rods (3) have two pull rods (3) and the two pull rods (3) are located between the two clips (2). Each pull rod (3) comprises a rod portion (301) and a hook portion (302) located at the front end of the rod portion (301) and having a notch (3021). The notches (3021) of the two hook portions (302) are in opposite directions.

6. The hemostatic clip for endoscope according to claim 3, characterized in that: The push-pull assembly further comprises two symmetrically arranged blocking wings (303) extending along the axial direction, the two blocking wings (303) being located on both sides of the two control sections (202) and corresponding one to one with the two locking hooks (2021), and each blocking wing (303) being used to block the corresponding locking hook (2021) from approaching the locking groove (101).

7. The hemostatic clip for endoscope according to claim 6, characterized in that: A connecting portion is provided between the two blocking wings (303), and the connecting portion is provided with an abutting wing (304) protruding radially and abutting against the step (402).

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