Hemostatic clamp with self-locking chuck

Abstract

The utility model relates to medical instruments, in particular to a hemostatic clip with a self-locking chuck, which comprises the chuck, a control sleeve and a far-end operating device, the chuck is provided with two clamping arms and a self-locking structure, the self-locking structure comprises a clamping hook and a clamping groove which are mutually matched, one clamping arm is provided with the clamping hook, and the other clamping arm is provided with the clamping groove; a control hole is formed in the control sleeve; according to the utility model, the chuck with the self-locking structure is matched with the control sleeve fixed on the spring tube, so that the chuck and the control sleeve can be opened and closed when moving relative to each other, and when the chuck reaches a closed state to clamp tissues, the chuck is automatically locked by clamping the clamping hook and the clamping groove on the chuck; the control sleeve does not need to lock the clamping head in a closed state, so that only the clamping head is kept in the body of a patient, the retaining size of the hemostatic clip is reduced, the safety coefficient is improved, the space for instrument operation is utilized to the maximum extent, the structure of the clamping head is simplified, and the reliability and the stability are high.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a hemostatic clamp with a self-locking clamp head. Background Art

[0002] A hemostatic clip is a device used with an endoscope to clamp soft tissues in the digestive tract. It is mainly composed of a remote operating device and a clamping device. The remote operating device is used to control the opening and closing of the clamp, and the clamp finally clamps the tissue. A sleeve is provided outside the clamp to maintain the clamp in a closed state.

[0003] For example, Chinese patents with publication numbers CN116784919A, CN210644111U and CN217186282U all adopt a method of disposing a sleeve outside the chuck, and the sleeve will remain in the patient's body together with the chuck, so that the chuck is maintained in a closed state by the sleeve; however, the sleeve and the chuck remain in the patient's body together, resulting in a larger retained volume of the hemostatic clip. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to solve the problem in the prior art that the chuck needs to be retained in the patient's body together with the sleeve, resulting in a large retained volume of the hemostatic clip, a hemostatic clip with a self-locking chuck is provided.

[0005] The utility model solves the technical problem by adopting a technical solution: a hemostatic clamp with a self-locking clamp head, comprising:

[0006] The clamp head has two clamp arms and a self-locking structure. The front end of the clamp arm is a clamping end, and the rear ends of the two clamp arms are integrally formed to form a transmission section, and the two clamp arms are elastic. The self-locking structure includes a hook and a slot that cooperate with each other. One clamp arm is provided with a hook, and the other clamp arm is provided with a slot.

[0007] A control sleeve having a control hole therein;

[0008] And a remote operating device, comprising an operating wire, a spring tube and a handle assembly, wherein the front end of the spring tube is fixedly connected to the control sleeve, and the rear end of the spring tube is connected to the handle assembly, the operating wire is located in the spring tube and is detachably connected to the transmission section, and the handle assembly is configured to drive the chuck to move forward and backward in the control hole through the operating wire to change the angle between the two clamp arms, and when the chuck moves backward to the control hole to force the two clamp arms to be in a closed state, the hook is engaged with the slot.

[0009] Furthermore, a fixed sleeve is fixed to the front end of the spring tube, and the fixed sleeve has an inner hole inside, the aperture of the inner hole is larger than the aperture of the control hole, the front end of the control sleeve is located in the inner hole, and the control sleeve is clamped and fixed between the fixed sleeve and the spring tube, the clamping end of the chuck is located outside the fixed sleeve, and the transmission section of the chuck is movably arranged in the inner hole and can move between the inner hole and the control hole.

[0010] Furthermore, a rear limit surface is provided inside the front end of the spring tube, a front limit surface is provided in the inner hole of the fixed sleeve, the rear end of the control sleeve is inserted into the front end of the spring tube, the front end surface of the control sleeve contacts the front limit surface, and the rear end surface of the control sleeve contacts the rear limit surface.

[0011] Furthermore, the rear end of the control hole has a bottom edge for blocking the clamp.

[0012] Furthermore, there are two self-locking structures, namely a first self-locking structure and a second self-locking structure. The slot of the first self-locking structure and the hook of the second self-locking structure are respectively arranged on both sides of one clamp arm, and the hook of the first self-locking structure and the slot of the second self-locking structure are respectively arranged on both sides of the other clamp arm. When the two clamp arms are in a closed state, the hook of the first self-locking structure is inserted into the slot of the first self-locking structure, and the hook of the second self-locking structure is inserted into the slot of the second self-locking structure.

[0013] Furthermore, a clamping slot portion is integrally formed on the clamping arm, and the clamping slot portion is provided with the clamping slot;

[0014] The slot and / or the slot portion are elastic.

[0015] Furthermore, a connecting buckle is fixed to the front end of the operating wire, and the connecting buckle is clamped on the transmission section of the chuck.

[0016] The beneficial effects of the utility model are as follows: the hemostatic clamp with a self-locking chuck of the utility model utilizes a chuck with a self-locking structure to cooperate with a control sleeve fixed on a spring tube, so that the chuck and the control sleeve can perform opening and closing movements when they move relative to each other, and when the chuck reaches a closed state to clamp the tissue, the hook and the groove on the chuck engage to lock itself, and there is no need for the control sleeve to lock the chuck in a closed state. Therefore, only the chuck can be retained in the patient's body, thereby reducing the retention volume of the hemostatic clamp, improving the safety factor, maximizing the use of space for instrument operation, and simplifying the structure at the chuck, with high reliability and stability.

[0017] Other features and advantages of the present invention are specifically described in detail in the following exemplary embodiments. 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 cross-sectional schematic diagram of the two clamping arms of the clamp when they are opened;

[0020] Figure 2 yes Figure 1 A is a partial enlarged schematic diagram;

[0021] Figure 3 It is a three-dimensional schematic diagram of the two clamping arms of the clamp of the utility model when they are opened in cooperation with the control sleeve;

[0022] Figure 4 It is a cross-sectional schematic diagram of the two clamp arms of the clamp of the utility model when they cooperate with the control sleeve to be closed;

[0023] Figure 5 It is a three-dimensional schematic diagram of the two clamping arms of the clamp of the utility model when they cooperate with the control sleeve to close;

[0024] Figure 6 It is a cross-sectional schematic diagram of the two clamp arms of the clamp of the utility model cooperating with the control sleeve and being in a closed state;

[0025] Figure 7 It is a three-dimensional schematic diagram of the two clamping arms of the clamp of the utility model cooperating with the control sleeve and being in a closed state;

[0026] Figure 8 It is a cross-sectional schematic diagram of the utility model when the clamp in the closed state is separated from the control sleeve;

[0027] Fig. 9 It is a three-dimensional schematic diagram of the chuck of the utility model;

[0028] Fig.10 It is a three-dimensional schematic diagram of the connecting buckle of the utility model;

[0029] Fig.11 The utility model is a schematic diagram of a hemostatic clamp with a self-locking clamp head.

[0030] In the figure: 1, clamping head, 11, clamping arm, 111, hook, 112, slot, 113, slot part, 12, transmission section;

[0031] 2. control sleeve, 21. control hole, 211. bottom edge;

[0032] 3. operating line, 31. connecting buckle, 311. connecting hole, 312. notch;

[0033] 4. Spring tube, 41, rear limit surface;

[0034] 5. handle assembly, 51. slider, 52. handle;

[0035] 6. Fixed sleeve, 61. Inner hole, 611. Front limit surface. DETAILED DESCRIPTION

[0036] 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 claimed is limited only by the attached claims and their equivalents.

[0037] like Figure 1-11 As shown, a hemostatic clamp with a self-locking clamp includes a clamp 1, a control sleeve 2 and a distal operating device:

[0038] The chuck 1 has two clamping arms 11 and a self-locking structure. The material of the chuck 1 can be metal. The front end of the clamping arm 11 is a clamping end. The rear ends of the two clamping arms 11 are integrally formed to form a transmission section 12, and the two clamping arms 11 are elastic. The self-locking structure includes a hook 111 and a slot 112 that cooperate with each other. One clamping arm 11 is provided with a hook 111, and the other clamping arm 11 is provided with a slot 112. The clamping arm 11 can be, but not limited to, stamped to form the hook 111, and the hook 111 can be specifically arranged between the clamping end of the clamping arm 1 and the transmission section 12; similarly, the clamping arm 11 can be, but not limited to, stamped to form the slot 112, and the slot 112 can be specifically arranged between the clamping end of the clamping arm 1 and the transmission section 12.

[0039] The control sleeve 2 has a control hole 21 inside;

[0040] The remote operating device comprises an operating wire 3, a spring tube 4 and a handle assembly 5. The front end of the spring tube 4 is fixedly connected to the control sleeve 2, and the rear end of the spring tube 4 is connected to the handle assembly 5. The operating wire 3 is located in the spring tube 4 and is detachably connected to the transmission section 12. The handle assembly 5 is configured to drive the chuck 1 to move forward and backward in the control hole 21 through the operating wire 3 to change the angle between the two clamping arms 11, and when the chuck 1 moves backward to the control hole 21 to force the two clamping arms 11 to be in a closed state, the hook 111 is engaged with the slot 112; the handle assembly 5 may include a handle 52 and a slider 51 slidably mounted on the handle 52, the rear end of the spring tube 4 is connected to the handle 52, and the rear end of the operating wire 3 is fixedly connected to the slider 51. The operating wire 3 may specifically be a steel wire. In this way, by sliding the slider 51 on the handle 52, the slider 51 drives the operating wire 3 to move back and forth forward or backward.

[0041] The self-locking hemostatic clamp of the clamp head drives the clamp head 1 to move through the operating wire 3. When the clamp head 1 moves backward and gradually enters the control hole 21, the hole wall of the control hole 21 will generate a thrust on the clamp arm 11 in contact with it, so that the clamping ends of the two clamp arms 11 are close to each other, and the angle between the two clamp arms 11 becomes smaller, so that the two clamp arms 11 are closed; when the operating wire 3 drives the clamp head 1 to move forward and gradually leave the control hole 21, the two clamp arms 11 gradually lose the pressure of the hole wall of the control hole 21, and the clamping ends of the two clamp arms 11 are moved away from each other through the elasticity of the two clamp arms 11, and the angle between the two clamp arms 11 becomes larger, so that the two clamp arms 11 are opened;

[0042] When the chuck 1 is pulled until the two clamp arms 11 are in a closed state, the clamping ends of the two clamp arms 11 will clamp the tissue, and the hook 111 will automatically snap into the slot 112 to maintain the chuck 1 in a closed state. After the chuck 1 moves backward to a certain extent, it will not be able to move with the operating wire 3. In this way, the operating wire 3 will be separated from the chuck 1, and then the control sleeve 2, the spring tube 4 and the operating wire 3 will be withdrawn outward together, and the chuck 1 will be detached from the control sleeve 2, leaving only the chuck 1 in the patient's body.

[0043] The self-locking hemostatic clip of the chuck utilizes a chuck 1 with a self-locking structure to cooperate with a control sleeve 2 fixed on a spring tube 4, so that the chuck 1 and the control sleeve 2 can perform opening and closing movements when they move relative to each other, and when the chuck 1 reaches a closed state to clamp the tissue, the hook 111 and the groove 112 on the chuck 1 engage to lock itself, and there is no need for the control sleeve 2 to lock the chuck 1 in a closed state. Therefore, only the chuck 1 can be retained in the patient's body, thereby reducing the retention volume of the hemostatic clip, improving the safety factor, maximizing the use of space for instrument operation, and simplifying the structure at the chuck 1, with high reliability and stability.

[0044] In some examples, a fixed sleeve 6 is fixed to the front end of the spring tube 4, and an inner hole 61 is provided inside the fixed sleeve 6. The aperture of the inner hole 61 is larger than the aperture of the control hole 21. The front end of the control sleeve 2 is located in the inner hole 61, and the control sleeve 2 is clamped and fixed between the fixed sleeve 6 and the spring tube 4. The clamping end of the chuck 1 is located outside the fixed sleeve 6. The transmission section 12 of the chuck 1 is movably arranged in the inner hole 61 and can move between the inner hole 61 and the control hole 21. The inner hole 61 is coaxially arranged with the control hole 21, or is approximately aligned with the control hole 21. 1 is coaxially arranged; since the aperture of the inner hole 61 is larger than the aperture of the control hole 21, the closing amplitude when the chuck 1 enters the inner hole 61 is smaller than the closing amplitude when the chuck 1 enters the control hole 21, that is to say; when the chuck 1 is pulled from the inner hole 61 into the control hole 21, it is necessary to increase the force applied to the operating wire 3; in this way, the chuck 1 can be moved in the inner hole 61 first to tentatively close the chuck 1. After the operator determines the posture of the chuck 1 clamping the tissue, the force applied to the operating wire 3 can be increased to make the chuck 1 continue to enter the control hole 21 backward to further close.

[0045] In some examples, a rear limit surface 41 is provided inside the front end of the spring tube 4, a front limit surface 611 is provided in the inner hole 61 of the fixed sleeve 6, the rear end of the fixed sleeve 6 is welded and fixed to the front end of the spring tube 4, and the rear end of the control sleeve 2 is inserted into the front end of the spring tube 4, the front end surface of the control sleeve 2 contacts the front limit surface 611, and the rear end surface of the control sleeve 2 contacts the rear limit surface 41; in this way, the control sleeve 2 can be clamped and fixed between the spring tube 4 and the fixed sleeve 6, which is conducive to assembly, and the fixed sleeve 6 can be welded to the spring tube 4 from the outside, the welding points can be checked, and the product consistency can be ensured.

[0046] In some examples, the rear end of the control hole 21 has a bottom edge 211 for blocking the chuck 1, and the bottom edge 211 of the control hole 21 can abut against the rear limit surface 41; if the chuck 1 in the closed state has not been separated from the operating line 3 during the backward movement due to the small clamping tissue, when the chuck 1 in the closed state moves to contact with the bottom edge 211, the bottom edge 211 will prevent the chuck 1 from continuing to move backward with the operating line 3, thereby ensuring that the chuck 1 can be smoothly separated from the operating line 3.

[0047] In some examples, there are two self-locking structures, namely a first self-locking structure and a second self-locking structure. The slot 112 of the first self-locking structure and the hook 111 of the second self-locking structure are respectively arranged on both sides of one clamp arm 11, and the hook 111 of the first self-locking structure and the slot 112 of the second self-locking structure are respectively arranged on both sides of the other clamp arm 11. When the two clamp arms 11 are in a closed state, the hook 111 of the first self-locking structure is inserted into the slot 112 of the first self-locking structure, and the hook 111 of the second self-locking structure is inserted into the slot 112 of the second self-locking structure. The design of the double self-locking structure can stably and reliably keep the chuck 1 in a closed state.

[0048] In some examples, a clamping slot portion 113 is integrally formed on the clamping arm 11 , and the clamping slot 112 is formed in the clamping slot portion 113 ;

[0049] The slot 112 and / or the slot portion 113 are elastic, so that when the slot portion 113 initially contacts the hook 111, a certain elastic deformation can occur. Once the hook 111 is aligned with the slot 112, the hook 111 automatically snaps into the slot 112 under the action of its elasticity, thereby improving the reliability of the self-locking structure.

[0050] In some examples, a connecting buckle 31 is fixed to the front end of the operating wire 3, and the connecting buckle 31 is clamped on the transmission section 12 of the chuck 1. When the pulling force of the operating wire 3 on the chuck 1 is greater than the binding force between the connecting buckle 31 and the transmission section 12, the connecting buckle 31 is separated from the transmission section 12 of the chuck 1, thereby realizing a detachable connection between the operating wire 3 and the chuck 1.

[0051] Specifically, the connecting buckle 31 encloses a connecting hole 311, and the connecting hole 311 has a notch 312. The transmission section 12 of the chuck 1 is located in the connecting hole 311, thereby realizing the clamping connection between the chuck 1 and the transmission section 12. When the chuck 1 cannot move backward, the connecting buckle 31 will be deformed from the notch 312, so that the transmission section 12 of the chuck 1 is separated from the connecting hole 311 from the notch 312.

[0052] The working process of the above-mentioned hemostatic clamp with self-locking clamp head is as follows:

[0053] The clamp 1 is pulled by the operating wire 3 to move in the inner hole 61 in advance to tentatively close the clamp 1. After the operator has determined the posture of the clamp 1 to clamp the tissue, the force applied to the operating wire 3 can be increased to make the clamp 1 move backward into the control hole 21. The hole wall of the control hole 21 will generate a thrust on the clamp arm 11 in contact with it, so that the clamping ends of the two clamp arms 11 are close to each other to achieve the closure of the two clamp arms 11. When the clamp 1 is pulled until the two clamp arms 11 are in a closed state, the clamping ends of the two clamp arms 11 will clamp the tissue, and the hook 111 will automatically snap into the slot 112 to maintain the clamp 1 in a closed state. If the tissue clamped by the clamp 1 is large, the clamp 1 After moving backward to a certain extent, it will interfere with the control sleeve 2, causing the chuck 1 to be unable to move with the operating wire 3. In this way, the operating wire 3 will be separated from the chuck 1, and the fixed sleeve 6, the control sleeve 2, the spring tube 4 and the operating wire 3 will be withdrawn outward together, and the chuck 1 will be detached from the fixed sleeve 6 and the control sleeve 2, leaving only the chuck 1 in the patient's body; it is worth noting that if the chuck 1 in the closed state has not been separated from the operating wire 3 during the backward movement due to the small clamping tissue, when the chuck 1 in the closed state moves to contact the bottom edge 211, the bottom edge 211 will prevent the chuck 1 from continuing to move backward with the operating wire 3, thereby ensuring that the chuck 1 can be smoothly separated from the operating wire 3.

[0054] 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 with a self-locking clamp, characterized in that: include: The clamp (1) comprises two clamp arms (11) and a self-locking structure, wherein the front end of the clamp arm (11) is a clamping end, and the rear ends of the two clamp arms (11) are integrally formed to form a transmission section (12), and the two clamp arms (11) are elastic; the self-locking structure comprises a hook (111) and a slot (112) which cooperate with each other, wherein one clamp arm (11) is provided with the hook (111), and the other clamp arm (11) is provided with the slot (112); A control sleeve (2) having a control hole (21) therein; A remote operating device is provided, comprising an operating wire (3), a spring tube (4) and a handle assembly (5), wherein the front end of the spring tube (4) is fixedly connected to a control sleeve (2), and the rear end of the spring tube (4) is connected to the handle assembly (5), the operating wire (3) is located in the spring tube (4) and is detachably connected to a transmission section (12), and the handle assembly (5) is configured to drive a clamp (1) to move forward and backward in a control hole (21) through the operating wire (3) to change the angle between two clamp arms (11), and when the clamp (1) moves backward to the control hole (21) to force the two clamp arms (11) to be in a closed state, the hook (111) is clamped into a clamping groove (112).

2. The hemostatic clip with self-locking clamp according to claim 1, characterized in that: A fixing sleeve (6) is fixed to the front end of the spring tube (4), the fixing sleeve (6) has an inner hole (61) inside, the diameter of the inner hole (61) is larger than the diameter of the control hole (21), the front end of the control sleeve (2) is located in the inner hole (61), and the control sleeve (2) is clamped and fixed between the fixing sleeve (6) and the spring tube (4), the clamping end of the chuck (1) is located outside the fixing sleeve (6), and the transmission section (12) of the chuck (1) is movably arranged in the inner hole (61) and can move between the inner hole (61) and the control hole (21).

3. The hemostatic clip with self-locking clamp according to claim 2, characterized in that: The front end of the spring tube (4) is provided with a rear limit surface (41), the inner hole (61) of the fixed sleeve (6) is provided with a front limit surface (611), the rear end of the control sleeve (2) is inserted into the front end of the spring tube (4), the front end surface of the control sleeve (2) is in contact with the front limit surface (611), and the rear end surface of the control sleeve (2) is in contact with the rear limit surface (41).

4. The hemostatic clip with self-locking clamp according to claim 2, characterized in that: The rear end of the control hole (21) has a bottom edge (211) for blocking the clamp (1).

5. The hemostatic clip with self-locking clamp according to claim 1, characterized in that: There are two self-locking structures, namely a first self-locking structure and a second self-locking structure; the slot (112) of the first self-locking structure and the hook (111) of the second self-locking structure are respectively arranged on both sides of one clamp arm (11); the hook (111) of the first self-locking structure and the slot (112) of the second self-locking structure are respectively arranged on both sides of the other clamp arm (11); when the two clamp arms (11) are in a closed state, the hook (111) of the first self-locking structure is locked into the slot (112) of the first self-locking structure, and the hook (111) of the second self-locking structure is locked into the slot (112) of the second self-locking structure.

6. The hemostatic clip with self-locking clamp according to claim 1, characterized in that: A clamping slot portion (113) is integrally formed on the clamping arm (11), and the clamping slot portion (113) is provided with the clamping slot (112); The clamping slot (112) and / or the clamping slot portion (113) are elastic.

7. The hemostatic clip with self-locking clamp according to claim 1, characterized in that: A connecting buckle (31) is fixed to the front end of the operating wire (3), and the connecting buckle (31) is clamped on the transmission section (12) of the clamp (1).

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