Chuck assembly of endoscope double-side clamp
By using a coaxial hinge and locking pin design, the problem of excessively large size of the endoscope's double-sided clamps was solved, resulting in a smaller clamp diameter and better clamping performance, thus reducing surgical time and costs.
Patent Information
- Application Number
- CN202423159814.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The existing design of the double-sided clip for endoscopes results in an excessively large size, making it impossible to pass through the instrument channel of a conventional endoscope, thus increasing surgical time and patient costs.
The clamp arm design and locking pin structure are coaxially hinged. The locking pin at the proximal end of the clamp arm is located in the middle groove. The clamping performance of the clamp assembly is achieved through a smaller instrument channel. The clamp arm is hinged in the form of a lever and hooks the clamp seat limit plate through the locking pin.
The endoscope double-sided clip has a smaller clamp diameter, allowing it to pass through a smaller instrument channel, resulting in better clamping performance. The clamp arms are firmly locked by the clamp seat, reducing operation time and patient costs.
Smart Images
Figure CN223860892U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices, and in particular to a clamping assembly for an endoscope with bilateral clamps that can independently grasp tissues. Technical Background
[0002] The endoscopic double-sided clip is a novel type of endoscopic clip used to assist in the closure of large wounds during digestive endoscopy. It primarily involves controlling the opening and closing of the clip arms via an external control handle. During endoscopic examinations or surgeries, the surgeon can deliver the double-sided clip to the site requiring treatment through the endoscope's operating channel. For example, during a digestive tract endoscopy, if a bleeding wound is found, the surgeon can deliver the double-sided clip to the bleeding site, grasp one side of the tissue with the clip, pull on that tissue, and then grasp the other side, shrinking the larger wound into a linear wound. The clip is then released, and a traditional endoscopic clip is used to close the linear wound to achieve hemostasis.
[0003] Unlike traditional endoscopic clips, bilateral endoscopic clips need to overcome greater tissue tension and require more robust tissue clamping capabilities. Furthermore, the maneuverability of the clamp channel must be considered. Currently, the structural design of existing bilateral clips limits their minimum size, often exceeding 2.9 mm, while the instrument channel size of conventional endoscopes is mostly 2.8 mm. Therefore, physicians have to use endoscopes with larger maneuver sizes to facilitate the passage of the bilateral clips, which prolongs the operation time and increases the patient's treatment costs. Therefore, this invention proposes a smaller and more reliable bilateral clip to better meet clinical needs. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model proposes a clamp assembly for a bilateral endoscope clamp to overcome the shortcomings of existing technologies. This utility model is mainly achieved through the following technical solutions:
[0005] An endoscope double-sided clamp assembly includes a clamp base with a central plate at its distal end, and two clamp arms disposed on both sides of the central plate. The clamp base has a central groove at its proximal end, and a pair of obliquely aligned limiting baffles are located at the proximal end of the central groove. The limiting baffles are walls protruding from the sidewall of the central groove to the opposite side. The sidewall of the central groove also has a pin hole, and the two clamp arms are coaxially hinged within the central groove of the clamp base. Each clamp arm on both sides of the clamp base has an elongated slot and a locking element at its proximal end. The locking element has a stop pin that cooperates with the limiting baffle of the clamp base. The distal end of the locking element is bent and inserted into the proximal end of the clamp arm, dividing the elongated slot into opposing proximal and distal ends. The distal end of the elongated slot is a limiting groove for an opening / closing cable that drives the clamp arm to open and close, and the proximal end of the elongated slot is a sliding groove for the stop pin on the locking element. When the clamping arm closes under the action of the cable, the locking member and the proximal end of the clamping arm retract together into the middle groove of the clamp seat, and the stop pin on the locking member does not interfere with the limiting baffle of the clamp seat. When the locking member is pulled out from the proximal end of the clamping arm under the action of force, and the locking member moves towards the proximal end of the middle groove, the stop pin on the locking member engages with the limiting baffle of the clamp seat, thus locking the clamping arm by the clamp seat and maintaining the clamping state of the clamp.
[0006] Furthermore, the elongated slot is provided with a locking notch that mates with the partition plate.
[0007] Furthermore, the elongated slot is provided with a cable release notch for detaching the opening and closing cable.
[0008] Furthermore, the locking component is also provided with a stop pin fixing piece, the stop pin passing through the elongated slot and being fixedly connected to the stop pin fixing piece.
[0009] Furthermore, the locking member has a mounting hole for a locking cable at its proximal end.
[0010] Furthermore, the clamping arm is provided with distal biting teeth and side biting teeth.
[0011] Furthermore, the middle plate of the clamp is provided with a notch that engages with the side teeth of the clamping arm.
[0012] Furthermore, the distal end of the intermediate plate of the clamp is provided with intermediate teeth that engage with the distal teeth.
[0013] Compared with the prior art, this utility model has the following advantages:
[0014] (1) Through the structural design of this utility model, the diameter of the clamp head of the endoscope double clamp is smaller, which can pass through endoscopes with smaller instrument channel diameters. In addition, this utility model adopts a coaxial hinged clamp arm design. Compared with the double clamps with non-coaxial hinged clamp arms currently on the market, the coaxial hinge can save more space, and the locking parts at the proximal end of the clamp arm are all located in the middle groove, so that the clamp head of the endoscope double clamp of this utility model can pass through endoscopes with smaller instrument channels.
[0015] (2) The clamping head assembly of the endoscope double clamp of this utility model has better clamping performance. The clamping arm is hinged to the clamping seat in the form of a lever, and the clamping seat is hooked by the locking pin. The pin is blocked by the limiting plate and cannot move laterally, so the clamping arm will be firmly locked by the clamping seat. Attached Figure Description
[0016] Appendix Figure 1 This is a schematic diagram of the clamp assembly of the endoscope double-sided clamp according to Embodiment 1 of this utility model.
[0017] Appendix Figure 2 This is a schematic diagram of the clamp arm structure of the clamping head assembly of the endoscope double-sided clamp according to Embodiment 1 of this utility model.
[0018] Appendix Figure 3 This is a schematic diagram of the clamping structure of the clamping head assembly of the endoscope double-sided clamp according to Embodiment 1 of this utility model.
[0019] Appendix Figure 4 This is a schematic diagram of the locking component structure of the clamp assembly of the endoscope double-sided clamp according to Embodiment 1 of this utility model.
[0020] Appendix Figure 5 This is a schematic diagram showing that the clamp arm of the endoscope double-sided clamp in Embodiment 1 of this utility model is not locked after the clamping head assembly is closed.
[0021] Appendix Figure 6 This is a schematic diagram showing the locking of the clamp arm after the clamping head assembly of the endoscope double-sided clamp in Embodiment 1 of this utility model is closed.
[0022] Appendix Figure 7 This is a schematic diagram of the clamp arm structure of the clamping head assembly of the endoscope double-sided clamp according to Embodiment 2 of this utility model.
[0023] Figure label:
[0024] 11. Clamping arm; 12. Distal biting tooth; 13. Side biting tooth; 14. Pin hole; 15. Long slot hole; 16. Mounting notch; 17. Cable release notch; 18. Distal clamping part; 19. Intermediate hinge part; 10. Proximal locking part; 2. Clamping seat; 21. Intermediate plate; 22. Intermediate groove; 23. Clamping seat pin hole; 24. Intermediate tooth; 25. Limiting baffle; 26. Intermediate plate side notch; 27. Elastic grab buckle mounting hole; 3. Locking component; 31. Divider plate; 32. Stop pin; 33. Stop pin fixing piece; 34. Mounting hole; 4. Pin; 5. Opening and closing cable; 6. Locking cable. Detailed Implementation
[0025] The specific embodiments provided by this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that in this application, "proximal end" generally refers to the side closer to the surgeon during actual surgery, and "distal end" generally refers to the side closer to the patient. The terms "proximal end" and "distal end" are relative and do not refer to any specific component.
[0026] Example 1
[0027] like Figures 1-6 As shown, a clamp assembly for an endoscope double-sided clamp includes two clamping arms 1, a clamping base 2, and two locking members 3 disposed at the proximal ends of the clamping arms 1. The two clamping arms 1 are hinged to the clamping base 2 by pins 4. Figure 2 As shown, the clamping arm 1 includes a distal clamping portion 1a, a middle hinge portion 1b, and a proximal locking portion 1c. The distal clamping portion 1a is provided with distal teeth 11 and side teeth 12; the middle hinge portion 1b is provided with a pin hole 13; and the proximal locking portion 1c is provided with an elongated slot 14. The elongated slot 14 has an installation notch 15 for the locking element 3 and a cable disengagement notch 16 for the opening / closing cable 5. Figure 3 As shown, the clamp 2 is provided with an intermediate plate 21 and an intermediate groove 22. The distal end of the intermediate plate 21 is provided with an intermediate tooth 24 that mates with the distal biting tooth 11, and an intermediate plate side notch 26 that mates with the side biting tooth 12. The side wall of the intermediate groove 22 is provided with a clamp pin hole 23, through which a pin 4 passes.
[0028] The proximal sidewall of the intermediate groove 22 is also provided with a pair of obliquely aligned limiting baffles 25. When the stop pin 32 is between the obliquely aligned limiting baffles 25, the limiting baffles 25 can limit the stop pin 32. The proximal end of the clamp 2 is also provided with a mounting hole 27 for an elastic gripper. When the elastic gripper needs to be disengaged, it can be pulled away from the mounting hole 27. Figure 4As shown, the locking member 3 includes a distally bent partition 31, a stop pin 32, and a stop pin fixing plate 33. The proximal end of the locking member 3 has a mounting hole 34 for the locking cable 6. The distal bent portion of the partition 31 is inserted into the locking member mounting notch 15 at the proximal end of the clamping arm 1, dividing the elongated slot 14 into opposing distal and proximal ends. The distal end of the elongated slot 14, separated by the partition 31, forms a limiting groove for the opening / closing cable 5. By setting the end limiting head of the opening / closing cable 5 to be larger than the size of the distal end of the limiting groove, the opening / closing cable 5 cannot be dislodged from the distal end of the limiting groove. The proximal end of the elongated slot, separated by the partition 31, forms a sliding groove for the stop pin 32 on the locking member 3. The stop pin 32 of the locking member 3 passes through the sliding groove and is fixedly connected to the stop pin fixing plate 33 on the opposite side. Figure 5 As shown, when the clamping arms 1 on both sides of the clamping seat 2 are fully closed, the stop pin 32 on the locking member 3 and the limiting baffle 25 on the clamping seat 2 have a gap, that is, the two do not interfere with each other, and the clamping arms 1 can be repeatedly opened and closed. Figure 6 As shown, when it is necessary to lock the clamping arm, by pulling the locking cable 6 attached to the locking member 3, the separator 31 is moved towards the proximal end of the clamping seat 2, the distal insertion part of the separator 31 is pulled out, and at the same time, the stop pin 32 is moved towards the proximal end of the intermediate groove 22. When the stop pin 32 is hooked onto the limiting baffle 25 on the clamping seat 2, the clamping arm 1 is locked by the clamping seat 2.
[0029] When the clamping arm 1 is locked by the clamping seat 2, the cable release notch 16 located near the long slot 14 is exposed because the distal insertion part of the separator 31 is pulled out. The end limiting head of the opening and closing cable 5 can move along the distal end of the long slot 14 to the position of the cable release notch 16 and release under the action of force.
[0030] Example 2
[0031] An endoscope double-sided clamp assembly includes two clamping arms 1 and a clamping base 2 with a central groove 22. The two clamping arms 1 are coaxially hinged to the clamping base 2. A pair of obliquely aligned limiting baffles 25 are provided in the central groove 22. Each limiting baffle 25 is a wall extending from the side wall of the central groove to the opposite side. Each clamping arm 1 is provided with a locking element 3.
[0032] The parts that are the same as those in the above embodiments will not be repeated. The differences are as follows: Figure 7As shown, in this embodiment, the clamping arm 1 consists of a clamping member and a fitting member. The clamping member has a distal biting tooth 11, a side biting tooth 12, and a contour groove that mates with the fitting member. The fitting member has an elongated slot 14, within which are an installation notch 15 for the separator 31 and a cable release notch 16 for opening and closing the cable 5. By configuring the clamping arm 1 to consist of a clamping arm member and a fitting member, accuracy can be improved, and the size can be reduced while lowering costs.
[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A clamp assembly for an endoscope bilateral clamp, comprising a clamp base with a central plate at its distal end, and two clamping arms disposed on both sides of the central plate and having elongated slots; the clamp base has a central slot at its proximal end, and the two clamping arms are coaxially hinged to the clamp base, characterized in that, A locking component is also provided. A limiting baffle is provided at the proximal end of the intermediate groove. When the clamping arm is locked, the limiting baffle locks the locking component. The locking component includes a separator plate with a bent distal end and a stop pin. The separator plate divides the elongated slot on the clamping arm into opposite proximal and distal ends. The distal end of the elongated slot is a limiting groove for the opening and closing cable that drives the clamping arm to open and close. The proximal end of the elongated slot is a sliding groove for the stop pin on the locking component.
2. The clamp assembly of the endoscopic bilateral clamp according to claim 1, characterized in that, The elongated slot is provided with a locking notch that mates with the separator.
3. The clamp assembly of the endoscopic bilateral clamp according to claim 1, characterized in that, The long slot is provided with a cable release notch for the opening and closing cable to disengage.
4. The clamp assembly of the endoscopic bilateral clamp according to claim 1, characterized in that, The locking component is also provided with a stop pin fixing piece, the stop pin passing through the elongated slot and being fixedly connected to the stop pin fixing piece.
5. The clamp assembly of the endoscopic bilateral clamp according to claim 1, characterized in that, The locking element has a mounting hole for the locking cable at its near end.
6. The clamp assembly of the endoscopic bilateral clamp according to claim 1, characterized in that, The clamping arm is provided with distal biting teeth and side biting teeth.
7. The clamp assembly of the endoscopic bilateral clamp according to claim 6, characterized in that, The middle plate of the clamp is provided with a notch that engages with the side teeth of the clamp arm.
8. The clamp assembly of the endoscopic bilateral clamp according to claim 6, characterized in that, The distal end of the intermediate plate of the clamp is provided with intermediate teeth that engage with the distal teeth.