Claw type connecting structure and hemostatic clip for endoscope

Abstract

The utility model relates to the field of medical instruments, in particular to a claw type connecting structure and a hemostatic clip for an endoscope. The embodiment of the utility model provides a claw type connecting structure which comprises an assembling cap, a locking sleeve located on one side of the assembling cap and a connecting pipe arranged on the inner side of the locking sleeve and the inner side of the assembling cap in a sleeved mode, and the end of the assembling cap is inserted into the locking sleeve. A hook claw piece is installed on the inner side of the assembling cap, and the free end of the hook claw piece is inserted into the inner side of the locking sleeve. A clamping jaw step is arranged on the inner side, attached to the assembly cap, of the locking sleeve, and the free end of the hook claw piece penetrates through the assembly cap to be connected with the clamping jaw step in a clamped mode. The metal cap and the hook claw piece are arranged, and the inner side of the hook claw piece is sleeved with the connecting pipe, so that the free end of the hook claw piece penetrates through the metal cap to be fixedly connected with the locking sleeve in the normal state, and when the hook claw piece is stressed, the hook claw piece cannot be separated from the locking sleeve due to the fact that the hook claw piece contracts inwards to the maximum extent, and reliable connection between the metal cap and the locking sleeve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a claw-type connection structure and a hemostatic clip for endoscopes. Background Art

[0002] A hemostatic clip is a medical device used in endoscopic surgery, which is mainly used to clamp bleeding points in the human gastrointestinal tract and suture wounds.

[0003] Hemostatic clips are highly specialized and commonly used instruments in digestive endoscopic surgery, providing excellent clinical results. However, current hemostatic clips on the market often feature spikes or protrusions on the connecting or locking portions of the clips, ensuring a secure connection. However, these spikes and protrusions can also pose a risk of scratching the endoscope's clamping port. Repairing damaged endoscope ports is a significant portion of endoscope repairs.

[0004] The above structure has the technical problem that the exposed thorns or protrusions may scratch the clamp tube during use. Therefore, it is urgent to design a new hemostatic clamp to solve the above technical problem. Utility Model Content

[0005] The purpose of the utility model is to provide a claw-type connection structure and an endoscope hemostatic clip to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present invention provides a claw-type connection structure, comprising: an assembly cap, a locking sleeve located on one side of the assembly cap, and a connecting pipe sleeved inside the locking sleeve and the assembly cap; wherein

[0007] The end of the assembly cap is inserted into the locking sleeve, and a hook piece is installed on the inner side of the assembly cap, and the free end of the hook piece is inserted into the inner side of the locking sleeve;

[0008] The inner side of the locking sleeve that is in contact with the assembly cap has a claw step, and the free end of the hook claw member passes through the assembly cap and is engaged with the claw step; and

[0009] The shortest distance from the tip of the free end of the hook piece to the connecting pipe is greater than the distance from the claw step to the connecting pipe.

[0010] Furthermore, the hook member includes a positioning ring and a plurality of limiting claws, and the limiting claws are evenly distributed along the circumference of the positioning ring.

[0011] Furthermore, the limiting claw includes an integrally connected claw arm, a claw bend and a claw hook, and the end of the claw arm away from the positioning ring is tilted outward;

[0012] The claws are bent toward the axis of the positioning ring;

[0013] The claw hook and the claw arm are approximately vertically arranged.

[0014] Furthermore, the claw arm and the positioning ring are elastically arranged;

[0015] When the hook claw member is installed in the assembly sleeve, the claw arm is parallel to the connecting pipe.

[0016] Furthermore, the included angle between the claw arm and the axis of the positioning ring is 5°.

[0017] Furthermore, a side wall of one end of the assembly cap inserted into the locking sleeve is provided with a plurality of through grooves, each of which corresponds to a corresponding limiting claw;

[0018] The free end of the limiting claw passes through the through slot and is engaged with the claw step.

[0019] In addition, the present invention also provides an endoscopic hemostatic clip, comprising: the claw-type connection structure as described above, wherein the hemostatic clip further comprises two clamps, a pin and a connecting hook;

[0020] The two clamps are arranged opposite to each other at one end of the locking sleeve away from the assembly cap;

[0021] The pin connects the tails of the two clamps; and

[0022] The connecting hook is retracted in the connecting tube and includes two hook units. The installation directions of the two hook units are opposite, and the tails of the two hook units are elastically connected. The heads of the two hook units are respectively clamped with the two ends of the pin shaft, and the maximum width of the heads is greater than the diameter of the connecting tube.

[0023] Furthermore, the tail of the chuck is provided with a barb, and the locking sleeve is provided with a barb step.

[0024] Furthermore, the hemostatic clip further comprises a transition spring, a main spring tube, a pull cable, an operating handle, a booster block and a pressure strip; wherein

[0025] One end of the transition spring is connected to the side of the assembly cap away from the locking sleeve, and the other end is connected to the main spring tube;

[0026] The end of the main spring tube away from the transition spring is inserted into the inner side of the operating handle;

[0027] The pressure strip is detachably connected to the operating handle and is in sliding contact with the main spring tube;

[0028] The boost block is slidably connected to the operating handle; and

[0029] One end of the pull rope is connected to the tail of the connecting hook, and the other end is connected to the boosting block.

[0030] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: by providing a metal cap and a hook claw member, and sleeved with a connecting tube on the inner side of the hook claw member, the hook claw member is normally connected and fixed with the locking sleeve through the free end of the metal cap, and when subjected to pressure, the hook claw member will not separate from the locking sleeve even when it contracts inward to the maximum extent, thereby ensuring a reliable connection between the metal cap and the locking sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Figure 1 A schematic structural diagram of an embodiment of an endoscopic hemostatic clip provided by the present invention is shown;

[0033] Figure 2 A cross-sectional view of an embodiment of the claw-type connection structure provided by the present invention is shown;

[0034] Figure 3 Shown Figure 2 A partial enlarged view of part A;

[0035] Figure 4 A perspective view of an embodiment of a hook member provided by the present invention is shown;

[0036] Figure 5 A side view of an embodiment of a hook member provided by the present invention is shown;

[0037] Figure 6 A front view of an embodiment of the connecting hook provided by the present invention in an open state is shown;

[0038] Figure 7 A top view of a connecting hook provided by the present invention in a closed state is shown;

[0039] Figure 8 A schematic diagram of an embodiment of the chuck provided by the present invention in an open state is shown;

[0040] Figure 9 A schematic diagram of a chuck in a closed state according to an embodiment of the present invention is shown.

[0041] In the picture:

[0042] 1. Assembly cap; 11. Through slot;

[0043] 2. Locking sleeve; 21. Claw step; 22. Prick step;

[0044] 3. Connecting pipe;

[0045] 4. hook claw; 41. limit claw; 411. claw arm; 412. claw bend; 413. claw hook; 42. positioning ring;

[0046] 5. Chuck; 50. Barb; 51. Pin; 52. Connecting hook; 53. Hook unit;

[0047] 6. Transition spring; 61. Main spring tube; 62. Pull cable; 63. Operating handle; 64. Boost block; 65. Pressure strip. DETAILED DESCRIPTION

[0048] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0049] In the prior art, to achieve reuse of the claw-type connection structure, the clamp head is usually designed to be detachable, allowing the clamp to be separated from the body after surgery, thus enabling reuse of the hemostatic clip. However, this also brings the technical problem that the hemostatic clip body and the clamp may become detached within the patient's body.

[0050] In order to solve the above technical problems, Figure 2 As shown, at least one embodiment provides a claw-type connection structure, comprising: an assembly cap 1, a locking sleeve 2 located on one side of the assembly cap 1, and a connecting tube 3 sleeved within the locking sleeve 2 and the assembly cap 1. The connecting tube 3 is coaxially arranged with the assembly cap 1 and the locking sleeve 2 and is capable of sliding along the axial direction of the assembly cap 1. The assembly cap 1 and the locking sleeve 2 are two separate components. A hook member 4 is mounted on the inner side of the assembly cap 1. The free end of the hook member 4 is inserted into the inner side of the locking sleeve 2. The assembly cap 1 is detachably connected to the locking sleeve 2 via the hook member 4.

[0051] In order to realize the detachable connection between the assembly cap 1 and the locking sleeve 2 by the hook member 4, as shown in FIG. Figure 3As shown, in at least one embodiment, the sidewall of the end of the assembly cap 1 that is inserted into the locking sleeve 2 is provided with a plurality of through-grooves 11. The inner side of the locking sleeve 2 where it contacts the assembly cap 1 has a claw step 21. The free end of the hook member 4 is axially inserted into the locking sleeve 2 and radially extends outward, passing through the plurality of through-grooves 11 and engaging with the claw step 21. Furthermore, the shortest distance between the free end of the hook member 4 and the connecting tube 3 is greater than the distance between the claw step 21 and the connecting tube 3. That is, when the connecting tube 3 is located inside the locking sleeve 2 and the assembly cap 1, if the outer wall of the assembly cap 1 is subjected to pressure, the free end of the hook member 4 approaches the connecting tube 3. Since the shortest distance between the tip of the free end of the hook member 4 and the connecting tube 3 is always greater than the distance between the claw step 21 and the connecting tube 3, the free end of the hook member 4 cannot escape from the gap between the claw step 21 and the connecting tube 3. In other words, in this state, the hook member 4 can reliably connect the assembly cap 1 and the locking sleeve 2 without accidental separation. On the other hand, when the connecting tube 3 is not inside the locking sleeve 2 and the assembly cap 1, the free end of the hook member 4 can retract inward without being blocked by the connecting sleeve 3, and can therefore escape from the claw step 21, thereby separating the locking sleeve 2 from the assembly cap 1.

[0052] The structure of the hook member 4 is described in detail below. Figure 4 and Figure 5 As shown, the hook member 4 includes a positioning ring 42 and a plurality of limiting claws 41, and the limiting claws 41 are evenly distributed along the circumference of the positioning ring 42. Preferably, the number of limiting claws 41 is three, that is, the number of through-grooves 11 is also three, and one limiting claw 41 can be inserted into one through-grooves 11. The limiting claw 41 includes an integrally connected claw arm 411, a claw bend 412 and a claw hook 413. The claw arm 411 is tilted outward at one end away from the positioning ring 42, that is, the claw arm 411 has an angle with the axis of the positioning ring 42, the claw bend 412 is bent toward the axis of the positioning ring 42, and the claw hook 413 is perpendicular to the claw arm 411. The claw arm 411 and the positioning ring 42 are elastically arranged. Preferably, the angle is 5°. When the hook member 4 is installed in the assembly sleeve, the claw arm 411 is parallel to the connecting tube 3. Due to the above-mentioned elastic setting and the existence of the angle, the hook member 4 tends to open outward until the free end of the hook member 4 touches the inner wall of the locking sleeve 2, and the connection between the assembly cap 1 and the locking sleeve 2 is tighter.

[0053] like Figure 1As shown, at least one embodiment further provides an endoscopic hemostatic clip, comprising the claw-type connection structure described above, two chucks 5, an operating handle 63, a main spring tube 61, and a transition spring 6. The two chucks 5 are both mounted in the locking sleeve 2 in the claw-type connection structure, and the two chucks 5 are relatively arranged at the end of the locking sleeve 2 away from the assembly cap 1. The main spring tube 61 is connected to the transition spring 6, and the other end of the main spring 61 is connected to the operating handle 63. The end of the main spring tube 61 away from the transition spring 6 is inserted into the inside of the operating handle 63. The other end of the transition spring 6 is connected to the assembly cap 1, and the operating handle 63 can be grasped and operated by medical staff. A booster block 64 and a pressure strip 65 are also mounted on the operating handle 63. The pressure strip 65 is detachably connected to the operating handle 63 and is used to fix the position of the main spring tube 61, and the pressure strip 65 abuts against the main spring tube 61. A cable 62 is mounted on the end of the boost block 64. The cable 62 is located inside the main spring tube 81 and the transition spring 6 and extends toward the chuck 5. The boost block 64 is slidably connected to the operating handle 63. When the boost block 64 slides along the operating handle 63, the cable 62 is driven to slide synchronously.

[0054] like Figure 8 and Figure 9 As shown, in some embodiments, the hemostatic clamp further includes a pin 51 that connects the rear ends of the two clamps 5 to form a single unit, thereby achieving a synchronized opening or closing effect. The clamps 5 are arc-shaped with their middle portions contracting inward. Because the pin 51 is connected to the rear ends of the two clamps 5, it drives the two clamps 5 to slide within the locking sleeve 2, so that when the middle portions of the two clamps are in contact, the two clamps 5 are in a closed and clamped state. When the pin 51 drives the two clamps 5 to close at the rear ends of the locking sleeve 2, the heads of the two clamps 5 are in a state of opening to the sides.

[0055] like Figure 2 As shown, the hemostatic clip further includes a connecting hook 52, which is retracted in the connecting tube 3. The tail of the connecting hook 52 is connected to the cable 62. When the booster block 64 drives the cable 62 to slide, it can drive the connecting hook 52 to slide synchronously.

[0056] In order to achieve the effect of connecting the connecting hook 52 and the pin 51, as shown in FIG. Figure 6 and Figure 7 As shown, the connecting hook 52 comprises two hook units 53, which are installed in opposite directions. The tails of the two hook units 53 are elastically connected, and the maximum width of the heads of the two hook units 53 is greater than the diameter of the connecting tube 3. When the connecting hook 52 is not subjected to external forces, it is in an open state, at which time the heads of the two hook units 53 are respectively engaged with the ends of the pin 51. When the connecting hook 52 is pulled by the cable 62, the connecting hook 52 gradually retracts into the connecting tube 3, and the heads of the two hook units 53 gradually slide toward the center of the pin 51 until they are parallel to each other.

[0057] In order to achieve the hemostatic effect of closing and clamping the hemostatic clip, Figure 3 As shown, the tail of the two clamps 5 has barbs 50, and the locking sleeve 2 has a barb step 22. Figure 8 and Figure 9 As shown, when the connecting hook 52 is subjected to tension from the cable 62, the hook 52 pulls the pin 51, which in turn pulls the tail ends of the two clamps 5 toward the end of the locking sleeve 2 away from the two clamps 5. During this movement, the two clamps 5 gradually close and clamp, while the tail ends of the two clamps 5 gradually open until the barbs 50 engage the retaining steps 22. At this point, the barbs at the tail ends of the clamps 5 are restrained by the retaining steps 22, preventing the clamps 5 from opening and maintaining a closed and clamped state, achieving a hemostatic effect.

[0058] Furthermore, during this movement, the pin 51 becomes stuck on the other end of the thorn step 22 within the locking sleeve 2. The connecting hook 52 is continuously subjected to the tension from the cable 62. As the tension increases, the heads of the two hook units 53 deform at their junctions with the pin 51, thereby separating the connecting hook 52 from the pin 51. Simultaneously, the heads of the two hook units 53 push the connecting tube 3 through the positioning ring 42, and the hook member 4 no longer encounters interference from the connecting tube 3 when it retracts toward the center. Because the maximum width of the heads of the two hook units 53 is greater than the diameter of the connecting tube 3, the heads of the two hook units 53 cannot pass through the positioning ring 42 together with the connecting tube 3. At this time, the heads of the two hook units 53 will continue to apply force to the positioning ring 42 in the direction of tension. As the tension continues to increase, the positioning ring 42 will bulge in the direction of tension, thereby driving the hook member 4 to retract toward the center, further disengaging the claw hook 413 from the claw step 21 and the through groove 11, so that the assembly cap 1 is disengaged from the locking sleeve 2, and the locking sleeve 2 and the two clamps 5 remain in the human body. After a period of time, they are discharged by the human body, thereby realizing the function of reusing the hemostatic clip.

[0059] It is worth mentioning that the technical features such as the claw-type connection structure and other components of the endoscopic hemostatic clip involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial arrangement method of these technical features can be selected according to the conventional methods in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A claw-type connection structure, characterized in that: include: An assembly cap (1), a locking sleeve (2) located on one side of the assembly cap (1), and a connecting pipe (3) sleeved inside the locking sleeve (2) and the inner side of the assembly cap (1); wherein The end of the assembly cap (1) is inserted into the locking sleeve (2), a hook member (4) is installed on the inner side of the assembly cap (1), and the free end of the hook member (4) is inserted into the inner side of the locking sleeve (2); The inner side of the locking sleeve (2) that fits the assembly cap (1) has a claw step (21), and the free end of the hook claw member (4) passes through the assembly cap (1) and is engaged with the claw step (21); and The shortest distance from the free end of the hook member (4) to the connecting pipe (3) is greater than the distance from the claw step (21) to the connecting pipe (3).

2. The claw-type connection structure according to claim 1, characterized in that: The hook member (4) comprises a positioning ring (42) and a plurality of limiting claws (41), wherein the limiting claws (41) are evenly distributed along the circumference of the positioning ring (42).

3. The claw-type connection structure according to claim 2, characterized in that: The limiting claw (41) comprises an integrally connected claw arm (411), a claw bend (412) and a claw hook (413), and one end of the claw arm (411) away from the positioning ring (42) is tilted outward. The claw bend (412) bends toward the axis of the positioning ring (42); The claw hook (413) and the claw arm (411) are arranged approximately perpendicularly.

4. The claw-type connection structure according to claim 3, characterized in that: The claw arm (411) and the positioning ring (42) are elastically arranged; When the hook claw member (4) is installed in the assembly sleeve, the claw arm (411) is parallel to the connecting pipe (3).

5. The claw-type connection structure according to claim 3, characterized in that: The angle between the claw arm (411) and the axis of the positioning ring (42) is 5°.

6. The claw-type connection structure according to claim 2, characterized in that: The side wall of one end of the assembly cap (1) inserted into the locking sleeve (2) is provided with a plurality of through slots (11), each of the through slots (11) corresponding to a corresponding limiting claw (41); The free end of the limiting claw (41) passes through the through slot (11) and is engaged with the claw step (21).

7. An endoscopic hemostatic clip, characterized in that: include: The claw-type connection structure according to any one of claims 1 to 6; The hemostatic clamp further comprises two clamps (5), a pin (51) and a connecting hook (52); wherein The two clamps (5) are arranged opposite to each other at one end of the locking sleeve (2) away from the assembly cap (1); The pin (51) connects the tails of the two clamps (5); and The connecting hook (52) is retracted in the connecting tube (3) and comprises two hook units (53). The installation directions of the two hook units (53) are opposite, and the tails of the two hook units (53) are elastically connected. The heads of the two hook units (53) are respectively engaged with the two ends of the pin shaft (51), and the maximum width of the heads is greater than the diameter of the connecting tube (3).

8. The endoscopic hemostatic clip according to claim 7, wherein: The tail of the chuck has a barb (50), and the locking sleeve (2) has a barb step (22).

9. The endoscopic hemostatic clip according to claim 7, wherein: The hemostatic clip further comprises a transition spring (6), a main spring tube (61), a pull cable (62), an operating handle (63), a booster block (64) and a pressure strip (65); wherein One end of the transition spring (6) is connected to the side of the assembly cap (1) away from the locking sleeve (2), and the other end is connected to the main spring tube (61); One end of the main spring tube (61) away from the transition spring (6) is inserted into the inner side of the operating handle (63); The pressure strip (65) is detachably connected to the operating handle (63) by sliding, and the pressure strip (65) abuts against the main spring tube (61); The boost block (64) is slidably connected to the operating handle (63); and One end of the pull rope (62) is connected to the tail of the connecting hook (52), and the other end is connected to the boosting block (64).

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