Endoscope forcep head assembly and clip applier

Abstract

The utility model discloses an endoscope clip applier, a first clip head is provided with a first connecting part and a first working part, one end of the first working part is fixed with the first connecting part, a second clip head is provided with a second connecting part and a second working part, one end of the second working part is fixed with the second connecting part, and both the first connecting part and the second connecting part are in running fit with a first hinge part. The first connecting part is further connected with one end of the first connecting rod, the other end of the first connecting rod is connected with the transmission part, the transmission part is in clearance fit with the first through hole, the second connecting part is further connected with one end of the second connecting rod, and the other end of the second connecting rod is connected with the transmission part; a first tooth-shaped part used for penetrating into tissue or increasing the tissue clamping force is fixed to the first working part, and a second tooth-shaped part used for penetrating into tissue or increasing the tissue clamping force is fixed to the second working part. The clamping device has the advantage of being good in clamping stability.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment, and in particular to an endoscope forceps assembly and clamping forceps. Background Technology

[0002] Endoscopic clips are tools used in endoscopic examinations and treatments, typically to reach limited or hard-to-access body cavities. Using advanced grippers and mechanical structures, clips can clamp, grasp, and move tissues such as tumors, polyps, bleeding vessels, or foreign bodies. Clips are often used in conjunction with an endoscopic lamp and camera, allowing physicians to precisely manipulate and observe the endoscopic situation by monitoring the video output. Clips are widely used in the examination and treatment of the gastrointestinal tract, respiratory tract, and urinary tract, reducing surgical trauma and postoperative recovery time, improving medical efficiency and patient experience.

[0003] Endoscopic clamps typically consist of a core rod, a slip ring assembly, a telescopic traction assembly, a sheath, and a clamp head assembly. The slip ring assembly slides with the core rod. One end of the telescopic traction assembly is connected to the slip ring assembly, and the other end is located inside the sheath and connected to the clamp head assembly. In use, the slip ring assembly moves along the core rod, causing the traction component to move. This causes the telescopic traction component to apply tension to the clamp head, switching the locking head from the open to the closed state, thereby clamping the tissue.

[0004] The current clamp head assembly consists of a clamp head frame, a rivet, and two clamp heads. The two clamp heads are fitted onto the same rivet, which is fixed to the clamp head frame, thus creating a hinge between the clamp heads and the clamp head frame. One end of each clamp head is connected to a traction component.

[0005] The drawback of the aforementioned forceps assembly is that, during tissue clamping, although the operator applies sufficient force to the slip ring assembly, the forceps currently in use are flat-jaw forceps, which have limited clamping force on the tissue. Therefore, the forceps are not stable in their clamping of the tissue and sometimes even slip out. This requires repeated operations during the procedure, which increases the patient's pain. Utility Model Content

[0006] This invention provides an endoscope clamping head assembly and clamping forceps with good clamping stability.

[0007] An endoscopic forceps assembly includes a forceps holder, a first hinge component, a first forceps head, and a second forceps head. The forceps holder has a first through hole arranged along the axial direction of the forceps holder. The first hinge component is connected to the forceps holder. The first forceps head has a first connecting portion and a first working portion fixed at one end to the first connecting portion. The second forceps head has a second connecting portion and a second working portion fixed at one end to the second connecting portion. Both the first connecting portion and the second connecting portion are rotatably engaged with the first hinge component. The assembly also includes a first connecting rod, a second connecting rod, and a transmission component. The first connecting portion is also connected to one end of the first connecting rod, and the other end of the first connecting rod is connected to the transmission component. The transmission component is clearance-fitted with the first through hole. The second connecting portion is also connected to one end of the second connecting rod, and the other end of the second connecting rod is connected to the transmission component. A first toothed component for inserting into tissue or increasing tissue clamping force is fixed on the first working portion, and a second toothed component for inserting into tissue or increasing tissue clamping force is fixed on the second working portion.

[0008] Furthermore, it also includes a spacer, which is fitted onto the first hinge member and is located between the first connecting part and the second connecting part.

[0009] Furthermore, the first working part is provided with a first discharge hole, and the second working part is provided with a second discharge hole.

[0010] Furthermore, the first toothed component and the second toothed component are triangular or trapezoidal.

[0011] Furthermore, there are multiple first toothed components located on the inner surfaces of the first working part and the second working part, and these first toothed components are arranged sequentially from one end of the first working part to the other end of the first working part; there are multiple second toothed components located on the inner surfaces of the second working part and the first working part, and these second toothed components are arranged sequentially from one end of the second working part to the other end of the second working part.

[0012] Furthermore, the first toothed component and the second toothed component are arranged in a staggered manner, so that when the first working part and the second working part are closed, the first toothed component and the second toothed component mesh with each other; or

[0013] The first toothed component and the second toothed component are arranged symmetrically. When the first working part and the second working part are closed, the tooth tip of the first toothed component abuts against the tooth tip of the second toothed component.

[0014] Furthermore, the first toothed component is inclined toward the first connecting portion, and the second toothed component is inclined toward the second connecting portion.

[0015] Furthermore, the first toothed component is provided on the inner sidewall of the other end of the first working part opposite to the second working part, and the second toothed component is provided on the inner sidewall of the other end of the second working part opposite to the first working part. There are multiple second toothed components, and a tooth groove is formed between two adjacent second toothed components to accommodate the first toothed component.

[0016] Furthermore, the first toothed component is U-shaped, with its non-closed end facing one end of the first working part, and its closed end connected to the other end of the first working part. The second toothed component is U-shaped, with its non-closed end facing one end of the second working part, and its closed end connected to the other end of the second working part.

[0017] The endoscopic clamp includes a core rod, a slip ring assembly, a telescopic traction assembly, and a protective tube. The slip ring assembly slides with the core rod, and the core rod has an assembly hole. The telescopic traction assembly is connected to the slip ring assembly and engages with both the assembly hole and the protective tube. The endoscopic clamp head assembly is also included, and a transmission component is connected to the telescopic traction assembly.

[0018] In this invention, when the first and second toothed components engage with the tissue, the contact area between the first and second toothed components and the tissue is smaller than that of the flat-jaw forceps. Therefore, under the same clamping force, the pressure exerted on the tissue by the first and second jaws in this embodiment is greater than that exerted on the tissue by the flat-jaw forceps. This improves the stability of the first and second jaws in clamping the tissue, which is beneficial for improving sampling efficiency, reducing sampling time, and reducing patient discomfort. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the endoscope forceps assembly in the open state according to the first embodiment.

[0020] Figure 2 In order to be in Figure 1 This is a schematic diagram with some parts hidden.

[0021] Figure 3 for Figure 2 A diagram from another direction.

[0022] Figure 4 This is a schematic diagram of the endoscope forceps assembly in the closed state according to the first embodiment.

[0023] Figure 5 This is a schematic diagram of the endoscope forceps assembly in the open state according to the second embodiment.

[0024] Figure 6 This is a schematic diagram of the endoscope forceps assembly in the closed state according to the second embodiment.

[0025] Figure 7 This is a schematic diagram of the endoscope forceps assembly in the open state according to the third embodiment.

[0026] Figure 8 This is a schematic diagram of the endoscope forceps assembly in the closed state according to the third embodiment.

[0027] Figure 9 This is a schematic diagram of the endoscope forceps assembly in the open state according to the fourth embodiment.

[0028] Figure 10 This is a schematic diagram of the endoscope forceps assembly in the closed state according to the fourth embodiment.

[0029] Figure 11 for Figure 9 A three-dimensional view of the first pliers head.

[0030] Figure 12 for Figure 9 A three-dimensional view of the second clamp head.

[0031] Figure 13 This is a schematic diagram of the endoscope forceps assembly in the open state according to the fifth embodiment.

[0032] Figure 14 This is a schematic diagram of the endoscope forceps assembly in the closed state according to the fifth embodiment.

[0033] Figure 15 A structural diagram of a clamp used to apply forceps to an endoscope.

[0034] Labels in the attached diagram:

[0035] 1. Pliers head holder, 1a. First through hole, 1b. Guide component, 1c. Support component, 2. First hinge component, 3. First pliers head, 3a. First connecting part, 3b. First working part, 3c. First toothed component, 3d. First discharge hole, 3e. First bending part, 3f. First groove, 3f. Second pliers head, 4. Second connecting part, 4a. Second working part, 4b. Second toothed component, 4c. Second discharge hole, 4d. Tooth groove, 4e. Second bending part, 4f. Second groove, 4g. First connecting rod, 6. Second connecting rod, 7. Transmission component, 8. Spacer.

[0036] Core rod 11, mounting hole 11a, slip ring assembly 12, telescopic traction assembly 13, booster tube 13a, elastic component 13b, steel wire cable 13c, protective tube 14. Detailed Implementation

[0037] First Embodiment

[0038] The endoscopic forceps assembly in this embodiment is as follows: Figures 1 to 4As shown, it includes a clamp head frame 1, a first hinge component 2, a first clamp head 3, a second clamp head 4, a first connecting rod 5, a second connecting rod 6, a transmission component 7, and a spacer 8, which will be described in detail below.

[0039] The plier head holder 1 has a first through hole 1a arranged along the axial direction of the plier head holder 1. The plier head holder 1 is composed of a guide component 1b and a support component 1c. The guide component 1b is a cylinder. The first through hole 1a passes through the axial end faces of both ends of the guide component 1b. One end of the support component 1c is fixed to the guide component 1b, and the other end of the support component 1c is used to connect to the first hinge component 2. There are two support components 1c, which are arranged at intervals. A clearance opening 1d is formed between the two support components 1c to allow the first plier head 3, the second plier head 4, the first connecting rod 5, and the second connecting rod 6 to swing.

[0040] The first hinge component 2 is connected to the pliers head frame 1. The first hinge component 2 is a spindle. An assembly hole is provided on the circumferential surface of the other end of the support component 1c. The two ends of the first hinge component 2 are respectively engaged with the assembly holes on the support component 1c. The first hinge component 2 and the assembly holes can be interference fit, so that the first hinge component 2 and the pliers head frame 1 are fixed together.

[0041] The first pliers head 3 has a first connecting part 3a and a first working part 3b fixed at one end to the first connecting part 3a. The second pliers head 4 has a second connecting part 4a and a second working part 4b fixed at one end to the second connecting part 4a. The first connecting part 3a and the second connecting part 4a are both rotatably engaged with the first hinge component 2. The first connecting part 3a and the second connecting part 4a are both loosely fitted on the first hinge component 2, so that the first connecting part 3a and the second connecting part 4a can rotate relative to the first hinge component 2 under the action of external force.

[0042] The first connecting part 3a is also connected to one end of the first connecting rod 5, and the other end of the first connecting rod 5 is connected to the transmission component 7. The first connecting rod 5 is hinged to the first connecting part 3a and the transmission component 7 respectively. The transmission component 7 is clearance-fitted with the first through hole 1a. The second connecting part 4a is also connected to one end of the second connecting rod 6, and the other end of the second connecting rod 6 is connected to the transmission component 7. The second connecting rod 6 is hinged to the second connecting part 4a and the transmission component 7 respectively.

[0043] When a pulling force is applied to the transmission component 7, the transmission component 7 drives the first connecting rod 5 and the second connecting rod 6 to rotate, thereby causing the first jaw 3 and the second jaw 4 to rotate in opposite directions, so that the first jaw 3 and the second jaw 4 are in a closed state. When a pushing force is applied to the transmission component 7, the transmission component 7 drives the first connecting rod 5 and the second connecting rod 6 to rotate in opposite directions, thereby causing the first jaw 3 and the second jaw 4 to rotate in opposite directions, so that the first jaw 3 and the second jaw 4 are in an open state.

[0044] Spacer 8 is fitted onto the first hinge member 2, and spacer 8 is located between the first connecting part 3a and the second connecting part 4a. In this embodiment, spacer 8 is loosely fitted onto the first hinge member 2, and spacer 8 serves to separate the first connecting part 3a and the second connecting part 4a, so that the first connecting part 3a and the second connecting part 4a can rotate smoothly around the first hinge member 2.

[0045] During tissue sampling, liquid leakage is inevitable, and sometimes gas may also be present inside the tissue. Since the space between the first working part 3b and the second working part 4b is limited when closed, a first discharge hole 3d is provided on the first working part 3b, and a second discharge hole 4d is provided on the second working part 4b to reduce the space occupied by liquid or gas between them. During tissue clamping, if liquid or gas is generated by the tissue clamped by the first working part 3b and the second working part 4b, this gas or liquid can be discharged through the discharge holes, thereby reducing the force applied by the operator to the transmission component 7.

[0046] To increase the stability of the first clamp head 3 and the second clamp head 4 in holding the tissue, a first toothed component 3c for inserting into the tissue or increasing the tissue clamping force is fixed on the first working part 3b, and a second toothed component 4c for inserting into the tissue or increasing the tissue clamping force is fixed on the second working part 4b. When the first toothed component 3c and the second toothed component 4c engage with the tissue, the contact area between the first toothed component 3c and the second toothed component 4c and the tissue is smaller than that of the flat-jaw pliers. Therefore, under the same clamping force, the pressure generated by the first clamp head 3 and the second clamp head 4 on the tissue in this embodiment is greater than that generated by the flat-jaw pliers, thereby improving the stability of the first clamp head 3 and the second clamp head 4 in holding the tissue and improving sampling efficiency.

[0047] In this embodiment, the first toothed component 3c and the second toothed component 4c are trapezoidal, and both the first toothed component 3c and the second toothed component 4c are isosceles trapezoids. There are multiple first toothed components 3c located on the inner surfaces of the first working part 3b and the second working part 4b, arranged sequentially from one end of the first working part 3b to the other end. Similarly, there are multiple second toothed components 4c located on the inner surfaces of the second working part 4b and the first working part 3b, arranged sequentially from one end of the second working part 4b to the other end.

[0048] The first toothed component 3c and the second toothed component 4c are arranged in a staggered manner. Since a first tooth groove is formed between two adjacent first toothed components 3c and a second tooth groove is formed between two adjacent second toothed components 4c, when the first working part 3b and the second working part 4b are closed, the first toothed component 3c engages with the second tooth groove, and the second toothed component 4c engages with the first tooth groove, thereby making the first toothed component 3c and the second toothed component 4c mesh with each other. This meshing structure of the first toothed component 3c and the second toothed component 4c provides good stability for tissue clamping.

[0049] Second Embodiment

[0050] like Figure 5 and Figure 6 As shown, the difference between this embodiment and the first embodiment is that both the first toothed component 3c and the second toothed component 4c are isosceles triangles. Because the contact area of ​​the isosceles triangular toothed component is smaller than that of the trapezoidal toothed component, the pressure exerted on the tissue by the first clamp head 3 and the second clamp head 4 is greater than that of the trapezoidal toothed component, resulting in better tissue clamping stability.

[0051] Third Embodiment

[0052] like Figure 7 and Figure 8 As shown, the difference between this embodiment and the first or second embodiment is that the first toothed component 3c and the second toothed component 4c are arranged symmetrically. When the first working part 3b and the second working part 4b are closed, the tooth tip of the first toothed component 3c abuts against the tooth tip of the second toothed component 4c.

[0053] Preferably, the first toothed component 3c and the second toothed component 4c are non-isosceles triangles or non-isosceles trapezoids. The first toothed component 3c is inclined toward the first connecting portion 3a, and the second toothed component 4c is inclined toward the second connecting portion 4a, that is, inclined toward the direction of the transmission component 7. Thus, the first toothed component 3c and the second toothed component 4c are oblique teeth. Since both the first toothed component 3c and the second toothed component 4c are inclined toward the direction of the applied tension, such oblique teeth can generate oblique cutting force on the tissue. Compared with embodiments 1 or 2, the first toothed component 3c and the second toothed component 4c in this embodiment are easier to sample.

[0054] Fourth embodiment

[0055] like Figures 9 to 12As shown, the difference between this embodiment and the first embodiment is that one end of the first working part 3b is bent to form a first bent part 3e, and the first toothed component 3c is provided on the inner sidewall of the other end of the first working part 3b opposite to the second working part 4b. The first working part 3b, the first bent part 3e and the first toothed component 3c form a structure close to a C-shape. One end of the second working part 4b is bent to form a second curved part 4f. The second toothed component 4c is provided on the inner sidewall of the other end of the second working part 4b opposite to the first working part 3b. The second working part 4b, the second curved part 4f, and the second toothed component 4c form a near-C-shaped structure. There are multiple second toothed components 4c. A tooth groove 4e is formed between two adjacent second toothed components 4c to accommodate the first toothed component 3c. When the first clamp head 3 and the second clamp head 4 are closed, the first toothed component 3c and the tooth groove 4e are in clearance fit, and an annular space for accommodating tissue is formed between the first working part 3b, the first toothed component 3c, the first curved part 3e, the second working part 4b, the second toothed component 4c, and the second curved part 4f.

[0056] Example 5

[0057] like Figure 13 and Figure 14 As shown, the difference between this embodiment and the first embodiment is that: the first toothed component 3c is U-shaped, with its non-closed end facing one end of the first working part 3b, and its closed end connected to the other end of the first working part 3b; the second toothed component 4c is U-shaped, with its non-closed end facing one end of the second working part 4b, and its closed end connected to the other end of the second working part 4b. The first working part 3b has a first groove 3f, and the second working part 4b has a second groove 4g.

[0058] like Figure 15 As shown, the endoscopic clamp of this utility model includes a core rod 11, a slip ring assembly 12, a telescopic traction assembly 13, and a protective tube 14. The slip ring assembly 12 is slidably engaged with the core rod 11. The core rod 11 has an assembly hole 11a. The telescopic traction assembly 13 is connected to the slip ring assembly 12 and engages with both the assembly hole 11a and the protective tube 14. It also includes the endoscopic clamp head assembly described in any of the above embodiments. A transmission component 7 is connected to the telescopic traction assembly 13. The telescopic traction assembly 13 includes a push tube 13a, an elastic component 13b, and a steel wire cable 13c. One end of the push tube 13a is connected to the slip ring assembly 12, and the other end is connected to one end of the elastic component 13b. A portion of the steel wire cable 13c is located inside the protective tube 14 and is clearance-fitted with it. One end of the steel wire cable 13c is connected to the elastic component 13b, and the other end is connected to the transmission component 7. A portion of the transmission component 7 is located inside the protective tube 14.

[0059] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of this application are still within the scope of this application.

Claims

1. An endoscope forceps head assembly, comprising a forceps head frame (1), a first hinging component (2), a first forceps head (3), and a second forceps head (4), the forceps head frame (1) being provided with a first through hole (la) arranged along the axial direction of the forceps head frame (1), the first hinging component (2) being connected to the forceps head frame (1), the first forceps head (3) having a first connecting portion (3a) and a first working portion (3b) fixed at one end of the first connecting portion (3a), the second forceps head (4) having a second connecting portion (4a) and a second working portion (4b) fixed at one end of the second connecting portion (4a), the first connecting portion (3a) and the second connecting portion (4a) being rotatably connected to the first hinging component (2), characterized in that, The first connecting part (3a) is further connected with one end of the first connecting rod (5), the other end of the first connecting rod (5) is connected with the transmission part (7), the transmission part (7) is matched with the first through hole (1a) in clearance, the second connecting part (4a) is further connected with one end of the second connecting rod (6), the other end of the second connecting rod (6) is connected with the transmission part (7), the first working part (3b) is fixed with the first toothed part (3c) for piercing the tissue or increasing the clamping force of the tissue, and the second working part (4b) is fixed with the second toothed part (4c) for piercing the tissue or increasing the clamping force of the tissue.

2. The endoscope forceps head assembly of claim 1, wherein, The spacer (8) is sleeved on the first hinged part (2), and the spacer (8) is located between the first connecting part (3a) and the second connecting part (4a).

3. The endoscope forceps head assembly of claim 1, wherein, The first working part (3b) is provided with the first discharge hole (3d), and the second working part (4b) is provided with the second discharge hole (4d).

4. The endoscope jaw assembly of any of claims 1 to 3, wherein, The first toothed part (3c) and the second toothed part (4c) are triangular or trapezoidal.

5. The endoscope forceps head assembly of claim 4, wherein, The first toothed part (3c) is multiple and located on the inner side of the first working part (3b) opposite to the second working part (4b), and the first toothed parts (3c) are arranged in sequence from one end of the first working part (3b) to the other end of the first working part (3b); the second toothed part (4c) is multiple and located on the inner side of the second working part (4b) opposite to the first working part (3b), and the second toothed parts (4c) are arranged in sequence from one end of the second working part (4b) to the other end of the second working part (4b).

6. The endoscope forceps head assembly of claim 5, wherein, The first toothed part (3c) and the second toothed part (4c) are arranged in dislocation, when the first working part (3b) and the second working part (4b) are closed, the first toothed part (3c) and the second toothed part (4c) are engaged with each other; or The first toothed part (3c) and the second toothed part (4c) are arranged in symmetry, when the first working part (3b) and the second working part (4b) are closed, the tooth top of the first toothed part (3c) is in abutment with the tooth top of the second toothed part (4c).

7. The endoscope forceps head assembly of claim 4, wherein, The first toothed part (3c) is inclined to the first connecting part (3a), and the second toothed part (4c) is inclined to the second connecting part (4a).

8. The endoscope forceps head assembly of any of claims 1-3, wherein, The first toothed part (3c) is arranged on the inner side wall opposite to the second working part (4b) at the other end of the first working part (3b), the second toothed part (4c) is arranged on the inner side wall opposite to the first working part (3b) at the other end of the second working part (4b), the second toothed part (4c) is multiple, and a tooth groove (4e) for accommodating the first toothed part (3c) is formed between adjacent two second toothed parts (4c).

9. The endoscope forceps head assembly of any of claims 1-3, wherein, The first toothed part (3c) is in the shape of a U, the non-closed end of the first toothed part (3c) faces one end of the first working part (3b), the closed end of the first toothed part (3c) is combined with the other end of the first working part (3b), the second toothed part (4c) is in the shape of a U, the non-closed end of the second toothed part (4c) faces one end of the second working part (4b), the closed end of the second toothed part (4c) is combined with the other end of the second working part (4b).

10. An endoscopic clip applier, comprising a core rod (11), a sliding ring assembly (12), a telescopic traction assembly (13), a sheath (14), the sliding ring assembly (12) being in sliding fit with the core rod (11), the core rod (11) being provided with an assembly hole (11a), the telescopic traction assembly (13) being connected with the sliding ring assembly (12), the telescopic traction assembly (13) being in fit with the assembly hole (11a) and the sheath (14) respectively, characterized in that, The endoscope forceps head assembly also comprises the transmission part (7) connected with the telescopic traction assembly (13).

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