CN116115288A

CN116115288A - Hemostatic clamp assembly and hemostatic clamp comprising same

Info

Publication number: CN116115288A
Application number: CN202310225453.3A
Authority: CN
Inventors: 缪东林
Original assignee: Jiangsu Weidekang Medical Science & Technology Co ltd
Current assignee: Jiangsu Weidekang Medical Science & Technology Co ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-05-16
Anticipated expiration: 2043-03-10
Also published as: CN116115288B

Abstract

The invention discloses a hemostatic clip assembly and a hemostatic clip comprising the same, which comprise a sleeve, two-piece type clamps and a traction device connected with the two-piece type clamps, wherein the two-piece type clamps comprise a fixing piece and two clamping pieces which are connected through the fixing piece and are oppositely arranged, and each clamping piece comprises a first clamping section close to a far end and a second clamping section close to a near end; and the second clamping section is penetrated with a fixing piece. Each second clamping section is provided with a first locking mechanism and a second locking mechanism which are oppositely arranged, the sleeve is provided with a third locking mechanism, after the traction device is separated from the second locking mechanisms, the two first locking mechanisms are mutually far away, and the first locking mechanisms and the third locking mechanisms are matched to fix the two-piece clamp with the sleeve. The clamping piece manufacturing process is simpler, the stress at the joint of the two clamping pieces is reduced, and the clamping piece can be detached and replaced.

Description

Hemostatic clamp assembly and hemostatic clamp comprising same

Technical Field

The invention relates to the technical field of medical instruments, in particular to a hemostatic clamp assembly and a hemostatic clamp comprising the hemostatic clamp assembly.

Background

Hemostatic clips, which typically use mechanical pressure generated when two clips are closed to compress the bleeding site to block blood flow; then, the clamping piece is separated by the external control handle, so that the clamping piece is left in the human body to achieve the aim of continuous hemostasis.

In the hemostatic clamp in the prior art, the two clamping pieces are of an integrated structure, the rear ends of the clamping pieces are fixedly connected, the connecting parts at the rear ends of the clamping pieces are stressed greatly in the process of opening and closing the clamping pieces for many times, a certain fracture risk exists, and secondly, when the integrated clamping pieces are used, the clamping pieces are required to be locked with the sleeve in a closed state through the diameter-changing design on the sleeve or the deformable structure arranged on the clamping pieces, if the sleeve is designed into the diameter-changing structure, the die opening cost is increased, the clamping pieces can be locked with the sleeve only by crossing the diameter-changing parts of the sleeve, the resistance of the back-pulled clamping pieces is large, and the operation difficulty is increased; if the deformable structure is installed on the clamping piece, additional design is needed for the specific structure and the deformation mode of the deformable structure, the modification on the original clamping piece is larger, and the production cost is increased.

In addition, in the existing hemostatic clip, the pull rod is mostly connected with the clamping piece through the C-shaped matching part, the C-shaped matching part is of a C-shaped structure, when the pull rod is separated from the clamping piece, the opening of the C-shaped matching part is increased, the opened C-shaped matching part is difficult to recover to the standard C-shaped structure, the pull rod cannot be stably connected with the rear end of the clamping piece again, and the pull rod is poor in recoverability.

The prior art also has clamping pieces with two-piece structures, but the clamping pieces and the pull rods are separated more difficultly due to the unreasonable structural design.

Disclosure of Invention

In order to solve the technical problems that two clamping pieces in a hemostatic clamp in the prior art are of an integrated structure, the clamping pieces have fracture risk, the locking structure of the clamping pieces and a sleeve is complex, and the cost is high, the invention provides a hemostatic clamp assembly and a hemostatic clamp comprising the same, and aims to solve the problems.

The invention provides a hemostatic clip assembly, which comprises a sleeve, two-piece type clamps and a traction device connected with the two-piece type clamps, wherein the two-piece type clamps and the traction device are at least partially accommodated in the sleeve, the two-piece type clamps comprise a fixing piece and two clamping pieces which are connected through the fixing piece and are oppositely arranged, and each clamping piece comprises a first clamping section close to a distal end and a second clamping section close to a proximal end; and the second clamping section is penetrated with a fixing piece.

Each second clamping section is provided with a first locking mechanism and a second locking mechanism which are oppositely arranged, and one end of the traction device is detachably connected with the two-piece type clamp through the second locking mechanism and enables the two first locking mechanisms to be close to each other.

The sleeve is provided with a third locking mechanism, the two-piece clamp moves towards the proximal end under the action of the traction device in the process that the traction device is separated from the second locking mechanism, and the sleeve forces the two first clamp sections to be gradually close to each other; after the traction device is separated from the second locking mechanism, the two first locking mechanisms are far away from each other, and the first locking mechanism and the third locking mechanism are matched to fix the two-piece clamp and the sleeve.

Further, the fixing piece is a pin shaft, and the second clamping section is provided with a shaft hole for the pin shaft to pass through.

Further, at least one end of the axial direction of the pin shaft is provided with a shielding cap, and the diameter of the shielding cap is larger than that of the shaft hole.

Furthermore, a shielding cap is arranged at one axial end of the pin shaft, and the other axial end of the pin shaft is of flaring design.

Further, the third locking mechanism is a clamping groove, and the first locking mechanism is a clamping hook.

Further, the second locking mechanism is located between the first locking mechanism and the fixing member.

Further, the pulling device comprises a rod part and a connecting part which are connected with each other, and the connecting part is matched with the second locking mechanism so as to connect the pulling device with the two-piece clamp; the connecting portion is capable of deforming and disengaging from the second locking mechanism under a proximally directed pulling force.

Further, the pulling device is composed of two pulling plates which clamp the two second clamping sections in the middle, and each pulling plate comprises a rod part and a connecting part.

Further, the second locking mechanism is a mating hole, and the connecting portion includes a plugboard inserted into the mating hole.

Further, the connecting portion further comprises a limiting plate extending towards the direction of the fixing piece, the limiting plate is provided with an opening, the opening faces towards the fixing piece, and the fixing piece is in clearance fit with the limiting plate.

Further, the inserting plates of the two pulling plates are arranged in parallel and oppositely, in a V-shaped, herringbone or splayed mode in the matching holes.

Further, the device also comprises a connecting shaft which is axially limited at the proximal end of the sleeve, the connecting shaft is provided with a central shaft for the pulling device to pass through, and the pulling device can drive the connecting shaft to move in the proximal direction of the sleeve so as to separate the connecting shaft from the sleeve.

The invention also provides a hemostatic clip which comprises a handle assembly and the hemostatic clip assembly, wherein the handle assembly drives a traction device in the hemostatic clip assembly to reciprocate.

The beneficial effects of the invention are as follows:

(1) The clamp disclosed by the invention consists of two clamping pieces, the two clamping pieces are connected through the fixing piece, each clamping piece is provided with a first locking mechanism matched with the sleeve, and the clamping pieces are locked with the sleeve through elastic deformation of the clamping pieces.

(2) The clamping piece is provided with the second locking mechanism matched with the traction device, the second locking mechanism is positioned between the first locking mechanism and the fixing piece, and after the traction device is separated from the second locking mechanism, the first locking mechanism can reach a free state and be fixed with the sleeve, so that the two-piece clamp is prevented from being locked in advance.

(3) The pulling device is connected with the clamp through the inserting plate inserted into the matching hole, and compared with the traditional C-shaped matching part, the inserting plate is easy to reset after deformation and can be recycled for multiple times.

(4) The traction device adopts a two-piece structure matched with the clamping piece, the structure has symmetry, the installation flexibility is strong, and the two-piece traction device is more beneficial to the opening of the connecting part.

Drawings

The invention will be further described with reference to the drawings and examples.

FIG. 1 is an assembly view of a two-piece clamp and pulling device of the present invention;

FIG. 2 is an enlarged view at a of FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

fig. 5 fig. 4 is an enlarged view at b;

FIG. 6 is a front view of the hemostatic clip of the present invention with the two-piece clamp initially closed;

FIG. 7 is a B-B cross-sectional view of FIG. 6;

FIG. 8 is a B-B cross-sectional view of the hemostatic clip of the present invention from the perspective of FIG. 6 as the pull rod is deformed;

FIG. 9 is a schematic view showing a state that the hemostatic clip is left in a human body after being released;

fig. 10 is a schematic view of an embodiment of a pulling device according to the present invention;

FIG. 11 is a schematic view of a pulling device of the present invention with a V-shaped arrangement of the insert plate;

FIG. 12 is a schematic view of a pulling device of the present invention with a herringbone arrangement of the insert plates;

fig. 13 is a schematic view of a pulling device of the present invention with the insert plates horizontally aligned;

fig. 14 is a schematic view of a pulling device when the insert plate is arranged in a splayed form in the present invention.

In the figure, 1, two-piece clamp, 101, fixing piece, 1011, shielding cap, 102, clamping piece, 1021, first clamping section, 1022, second clamping section, 2, first locking mechanism, 3, sleeve, 301, third locking mechanism, 4, pulling device, 401, pulling plate, 4011, rod, 4012, baffle, 4013, plugboard, 4014, bending plate, 5, shaft hole, 6, arc section, 7, second locking mechanism, 8, limiting plate, 9, connecting shaft, 901, central shaft, 10, outer tube, 11, inhaul cable, 12, lateral boss, 13 and sleeve.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

The invention takes one end close to the target pathological tissue as a far end and one end close to an instrument operator as a near end in a use state.

Example 1

As shown in fig. 1-6, a hemostatic clip assembly comprises a sleeve 3, a two-piece clamp 1, and a pulling device 4 connected with the two-piece clamp 1, wherein the two-piece clamp 1 and the pulling device 4 are at least partially accommodated in the sleeve 3, the two-piece clamp 1 comprises a fixing piece 101 and two clamping pieces 102 which are connected through the fixing piece 101 and are oppositely arranged, and each clamping piece 102 comprises a first clamping section 1021 near a distal end and a second clamping section 1022 near a proximal end; the second clamping section 1022 is provided with a fixing member 101.

Each second clamping section 1022 is provided with a first locking mechanism 2 and an oppositely arranged second locking mechanism 7, and one end of the pulling device 4 is detachably connected with the two-piece clamp 1 through the second locking mechanism 7 and enables the two first locking mechanisms 2 to be close to each other. The sleeve 3 is provided with a third locking mechanism 301, in the process that the pulling device 4 is separated from the second locking mechanism 7, the two-piece type clamp 1 moves towards the proximal end under the action of the pulling device 4, the sleeve 3 forces the two first clamping sections 1021 to gradually approach each other, after the pulling device 4 is separated from the second locking mechanism 7, the two first locking mechanisms 2 are separated from each other, and the first locking mechanism 2 and the third locking mechanism 301 are matched to fix the two-piece type clamp 1 and the sleeve 3.

The second clamping section 1022 is connected to the traction device 4, and the first clamping section 1021 is close to the target lesion or bleeding tissue and is used for clamping the human tissue to perform compression hemostasis, in a free state, the first clamping sections 1021 of the two clamping pieces 102 are in an open state, when limited by the inner diameter of the sleeve 3, the first clamping sections 1021 of the two clamping pieces 102 can be closed, namely when the two-piece type clamp 1 is gradually pushed out of the sleeve 3, the distal ends of the two clamping pieces 102 are gradually released from the constraint of the sleeve 3, the two first clamping sections 1021 are gradually opened, and when the two-piece type clamp 1 is pulled back into the sleeve 3, the two first clamping sections 1021 are gradually closed.

The first locking mechanisms 2 in the present invention are close to each other under the constraint of the pulling device 4, and can be far away from each other in the free state, while the first locking mechanisms 2 are located on the second clamping section 1022, that is, the proximal ends of the second clamping sections 1022 can be far away from each other in the free state, and this effect can be achieved by the elastic force of the second clamping sections 1022 themselves, or by an additionally added reset structure, for example, a reset spring is connected between the two second clamping sections 1022. The present embodiment designs the second clip segment 1022 to be arcuate with two clips 102 arranged side by side, with the arcuate back of the second clip segment 1022 facing. The positions where the arc back surfaces of the two opposite second clamping sections 1022 are oppositely connected, wherein the curvature center of one second clamping section 1022 and the curvature center of the other second clamping section 1022 are positioned at two sides of the position where the arc back surfaces are oppositely connected; when the arc back surfaces of the two second clamping sections 1022 are attached, the arc back surface connection points of the two second clamping sections 1022 gradually move distally due to the arc feature design and the lever principle of the second clamping sections 1022, the proximal ends of the two second clamping sections 1022 are opened outwards in a free state, and in the process of opening the proximal ends of the second clamping sections 1022 outwards, the two first clamping sections 1021 gradually approach each other, so that the two-piece clamp 1 is in a closed state. The distal end of the second clip segment 1022 in this embodiment is approximately C-shaped.

The fixing member 101 is used to connect the two clips 102 so that the two clips 102 can move synchronously. The second clamp segment 1022 may be curved in its entirety or may be curved in part, and when the part is curved, the curved segment 6 is preferably disposed near one end of the first clamp segment 1021. The second clamping sections 1022 of the two clamping pieces 102 are always provided with mutually approaching parts in the sleeve 3 under the limitation of the inner diameter of the sleeve 3, when the two first clamping sections 1021 are outside the sleeve 3, the arc-shaped sections 6 of the two second clamping sections 1022 are positioned outside the sleeve 3, the rear parts of the second clamping sections 1022 are limited in the sleeve 3, the arc-shaped sections 6 of the second clamping sections 1022 are opened outside the sleeve 3, so that the first clamping sections 1021 are opened, and the two-piece clamp 1 is in an opened state; when the two second clamping sections 1022 are dragged proximally by the pulling device 4 in the sleeve 3, the arc-shaped sections 6 of the two second clamping sections 1022 are jointed and extruded in the sleeve 3, the arc-shaped back connection points of the two second clamping sections 1022 gradually move towards the first clamping sections 1021, under the action of the lever principle, the proximal ends of the second clamping sections 1022 gradually tend to open, when the pulling device 4 is disengaged from the second locking mechanism 7, the pulling device 4 also releases the restraint on the proximal ends of the second clamping sections 1022, the proximal ends of the two second clamping sections 1022 are finally far away from each other, the first locking mechanism 2 is matched with the third locking mechanism 301, and at the moment, the two first clamping sections 1021 are relatively closed, so that the two-piece clamp 1 is in a closed state. The arc segments 6 of the clips 102 shown in fig. 1 and 4 are located on the second clip segments 1022, and the curvature center of the left arc segment 6 is a point O, and the point O and the right second clip segment 1022 are located on both sides of the left second clip segment 1022, that is, the arc segments 6 of the two second clip segments 1022 are bent outward (i.e., bent in opposite directions), for example, the clip 102 on the left side of fig. 4.

Compared with the integrated clamping piece 102 in the prior art, the two-piece clamp 1 in the embodiment is composed of two independent clamping pieces 102, the manufacturing process is simple, the two independent clamping pieces 102 can be identical in structure, batch manufacturing is convenient, stress at the connecting part of the two clamping pieces 102 is reduced, and fracture phenomenon cannot occur. And the clamping piece 102 is provided with the first locking mechanism 2, so that the locking of the two-piece clamp 1 and the sleeve 3 can be realized through the deformation of the clamping piece 102, the structure is simplified, and the action synchronism is improved.

The fixing element 101 is a pin shaft, and the second clamping section 1022 is provided with a shaft hole 5 through which the pin shaft passes. The pin shaft can prevent the two clamping pieces 102 from transversely moving in the sleeve 3, so that the two clamping pieces 102 move axially more stably, and the acting force of an operator on the traction device 4 can be relatively stable.

The third locking mechanism 301 may be, but not limited to, a slot, and the first locking mechanism 2 is a hook that mates with the slot. Each second clamping section 1022 is provided with a hook, and when the two second clamping sections 1022 are opened relatively, that is, when the first clamping section 1021 is closed relatively, the hook is matched with the sleeve 3 to fix the two-piece clamp 1 in the sleeve 3. In another embodiment, since the second clamping segments 1022 need to be opened and closed, the fixing member 101 is in clearance fit with the shaft hole 5, i.e. the diameter of the shaft hole 5 is larger than the diameter of the fixing member 101, and the length of the fixing member 101 needs to be such that the hooks can reach the slots of the sleeve 3 when the two second clamping segments 1022 are opened. The hooks on the two clips 102 may be disposed opposite to each other or diagonally.

In order to avoid the clip 102 from being separated from the pin shaft, it is preferable that at least one axial end of the pin shaft is provided with a shielding cap 1011, and the diameter of the shielding cap 1011 is larger than that of the shaft hole 5. The first locking mechanism 2 is at the proximal end of the clip 102 and the first locking mechanism 2 is moved a maximum distance laterally when the second clip segment 1022 is open, ensuring that the first locking mechanism 2 is able to engage the sleeve 3 (as shown in figure 9). In other alternative embodiments, a shielding cap 1011 may be provided at one axial end of the pin, and the other axial end of the pin is flared.

The second locking mechanism 7 is preferably located between the first locking mechanism 2 and the fixing piece 101, when the pulling device 4 is connected with the second locking mechanism 7, the two first locking mechanisms 2 are forced to approach, and when the pulling device 4 is separated from the second locking mechanism 7, the two first locking mechanisms 2 are automatically separated, so that a large instant release force can be provided for the first locking mechanisms 2, on one hand, the quick matching with the third locking mechanism 301 of the sleeve 3 is facilitated, on the other hand, the accuracy of the sequence of the sequential movement can be ensured, and the first locking mechanisms 2 are prevented from being released in advance.

The pulling device 4 comprises a rod portion 4011 and a connecting portion which cooperates with the second locking mechanism 7 to connect the pulling device 4 with the two-piece clamp 1; the connection is capable of deforming and disengaging the second locking mechanism 7 under a proximally directed pulling force. The connecting part can be in a claw-shaped structure in a closed state in a free state, and can deform and open under the action of tensile force.

The specific working process is as follows: when the pulling device 4 is matched with the second locking mechanism 7, the pulling device 4 clamps and pulls the two second clamping sections 1022, and when the pulling device 4 pushes the two-piece clamp 1 to move towards the distal end of the sleeve 3, the second clamping sections 1022 are gradually pushed out of the sleeve 3, and the two first clamping sections 1021 are free to open (as shown in fig. 1); when the two-piece clamp 1 is pulled toward the proximal end of the sleeve 3, the second clamp segment 1022 is brought into the sleeve 3 gradually, the two first clamp segments 1021 come closer to each other under the diameter size constraint of the sleeve 3, and the two-piece clamp 1 is in a closed clamped state (as shown in fig. 7). After the pulling device 4 is separated from the second locking mechanism, the proximal ends of the second clamping segments 1022 lose compressive force, the proximal ends of the two second clamping segments 1022 are free to open, and the first locking mechanism 2 is snapped onto the third locking mechanism 301 (as shown in fig. 9).

The width of the first clamping section 1021 is greater than the width of the second clamping section 1022, so that a lateral boss 12 is formed at the proximal end of the first clamping section 1021, the second clamping section 1022 being at least partially located within the sleeve 3 when the two-piece clamp 1 is in the closed condition, the first clamping section 1021 being located outside the sleeve 3, the lateral boss 12 abutting the distal end of the sleeve 3, inhibiting continued movement of the two-piece clamp 1 in the proximal direction.

In another embodiment, the second clamping section 1022 is arc-shaped, and the longitudinal axis of the first clamping section 1021 is substantially linear, when the two-piece clamp 1 is in the closed state, the maximum spacing between the clamping spaces formed between the two first clamping sections 1021 is not smaller than the outer diameter of the sleeve 3, so that the arc-shaped back surface of the second clamping section 1022 and the distal end of the sleeve 3 can abut against each other to prevent the two-piece clamp 1 from being further dragged by the pulling device 4 and prevent the two-piece clamp 1 from being pulled off the sleeve 3.

Example two

The present embodiment is different from the pulling device 4 in the first embodiment in structure, specifically: the second locking mechanism 7 is a mating hole, and the connecting portion includes a plugboard 4013 inserted into the mating hole.

As shown in fig. 3-5, two second clamping sections 1022 are provided with matching holes which are oppositely arranged, the matching holes are located between the pin shafts and the hooks, the rod 4011 is located at the proximal end of the pulling device 4, the inserting plate 4013 is connected with the rod 4011, when the inserting plate 4013 is matched with the matching holes, an included angle is formed between the surface of the inserting plate 4013 and the surface (the surface is the surface with a larger area) of the rod 4011, specifically, the inserting plate 4013 can be formed by performing laser cutting from the rod 4011 and bending sideways, or the inserting plate 4013 and the rod 4011 are mutually independent and are fixed in a welding or riveting mode, so that the inserting plate 4013 is clamped at the matching holes, as shown in fig. 5 and 8, the matching holes are opened along the horizontal direction, the inserting plate 4013 is approximately perpendicular to the rod 4011, and when the pulling device 4 is pulled towards the proximal end, the two-piece clamp 4013 is limited by the sleeve 3, and the inserting plate 4013 is gradually pulled towards the vertical state until being pulled out of the matching holes.

Preferably, an end wall surface of the mating hole far away from the first clamping section 1021 is a plane, and the inner wall and the outer side wall of the mating hole are in smooth transition, so that the pulling-out of the plugboard 4013 is more labor-saving, and the mating hole can be a rectangular hole, a waist-shaped hole, a triangular hole and the like.

The insertion plate 4013 is provided in two, and two insertion plates 4013 are inserted from both sides of the fitting hole. A baffle 4012 is further connected between the insert plate 4013 and the rod portion 4011, and the baffle 4012 can press the two second clamping sections 1022, so that when the pulling device 4 is pulled to the proximal end and is subjected to resistance, the baffles 4012 on two sides are opened to two sides. In this embodiment, two baffles 4012 may be connected to the same rod 4011, the size of the mating hole cannot be too large, if the height h of the mating hole is too large, the insert plate 4013 and the inner side of the mating hole have a gap, when the pulling device 4 is pushed, the two-plate clamp 1 cannot respond to the action of the pulling device 4 in time, and preferably, when two insert plates 4013 are simultaneously mated in the mating hole, the height h of the mating hole is slightly larger than the sum of the thicknesses d of the two insert plates 4013 (as shown in fig. 5), so that the two insert plates 4013 are attached to the inner side of the mating hole.

Example III

In the second embodiment, two baffles 4012 are connected to the same rod 4011, the lateral opening difficulty of the baffles 4012 and the plugboard 4013 is relatively high, the rod 4011 and the baffles 4012 are difficult to be integrally formed, and if the two baffles are fixedly connected at a later stage, the connection parts of the two baffles are easily disconnected, so that the following improvement is made in this embodiment:

as shown in fig. 2, 3 and 10, the pulling device 4 is composed of two pulling plates 401 sandwiching two second sandwiching sections 1022, each pulling plate 401 including one rod 4011, a baffle 4012 and a plugboard 4013. The arrangement direction of the two pulling plates 401 is parallel to the axial direction of the fixing piece 101, when the pulling plates 401 are pulled, the baffle 4012 and the plugboard 4013 can be bent along the thin-wall direction of the pulling plates 401, the bending difficulty is low, and the pulling device 4 is convenient to separate from the two-piece clamp 1.

The pulling device 4 of this embodiment is composed of two independent pulling plates 401, the rod portion 4011, the baffle 4012 and the plugboard 4013 on the pulling plates 401 can be integrally formed, no fracture phenomenon occurs during bending deformation, and when the pulling device 4 is ready to be separated from the second locking mechanism 7, the distal ends of the two pulling plates 401 can be freely opened. The two inserting plates 4013 can be inserted into the matching holes to apply pulling force to the two-piece type clamp 1, the two inserting plates 4013 can be arranged in parallel and opposite, V-shaped (shown in fig. 11), herringbone (shown in fig. 12) or splayed (shown in fig. 14) in the matching holes, the parallel and opposite arrangement comprises horizontal alignment (shown in fig. 13) and stacking arrangement (shown in fig. 10), and when the pull rod 4 is not pulled, the two inserting plates 4013 are abutted in the matching holes and cannot be separated from the matching holes.

The pulling plate 401 may be in a straight plate shape, at this time, the distances between the two baffles 4012 and the two rods 4011 are equal, and since the two baffles 4012 cannot be mutually attached, the two pulling plates 401 need to be obliquely arranged (as shown in fig. 10), the pulling plate 401 in this embodiment is in a bent shape, as shown in fig. 12 and 5, the rods 4011 and the baffles 4012 of the pulling plate 401 are connected through the bent plate 4014, at this time, the two rods 4011 are mutually attached, the two rods 4011 can be partially connected, and the design of the bent plate 4014 is also beneficial to the deformation and expansion of the baffles 4012.

Example IV

On the basis of the second embodiment or the third embodiment, the connecting portion further includes a limiting plate 8 extending toward the fixing member 101, the limiting plate 8 is provided with an opening, the opening faces the fixing member 101, and the fixing member 101 is in clearance fit with the limiting plate 8, as shown in fig. 2. The cooperation of the limiting plate 8 and the fixing piece 101 can enable the symmetrical axes of the traction device 4 and the two-piece clamp 1 to be on the same straight line, so that the traction device 4 is prevented from tilting. In addition, the limiting plate 8 is located between the second clamping section 1022 and the shielding cap 1011 (or the end flaring of the fixing piece 101), the limiting plate 8 is matched with the shielding cap 1011 and the flaring for use, the end flaring of the shielding cap 1011 and the fixing piece 101 is the maximum limit position of the second clamping section 1022 outwards flaring in a natural state, and the limiting plate 8 is the limit position of the second clamping section 1022 outwards flaring when the traction device 4 is connected with the second locking mechanism 7, and meanwhile, the effect of preventing the fixing piece 101 from laterally shifting is also achieved.

Example five

On the basis of the above embodiment, the hemostatic clip assembly further comprises a connecting shaft 9 axially limited at the rear end of the sleeve 3, the connecting shaft 9 is provided with a central shaft 901 for the pulling device 4 to pass through, and the pulling device 4 can drive the connecting shaft 9 to move towards the proximal end of the sleeve 3 so as to separate the connecting shaft 9 from the sleeve 3. The connecting shaft 9 conceals the connecting section of the pulling device 4 and the two-piece clamp 1 in the sleeve 3. The connecting shaft 9 is generally tubular in structure, and a sleeve 13 may be fixed to the proximal end of the pulling device 4, the sleeve 13 being engaged with the central shaft 901 in order to avoid changing the structure of the connecting shaft 9.

The contact surface between the sleeve 3 and the connecting shaft 9 can be a different diameter cylindrical surface, the connecting shaft 9 is extruded at the proximal end of the sleeve 3, and the connecting shaft 9 is contracted and deformed to be separated from the proximal end of the sleeve 3 under the tensile force of the traction device 4. In other embodiments, a barb abutting against the end face of the connecting shaft 9 may be provided at the proximal end of the sleeve 3, and the barb may support the rear end face of the connecting shaft 9 to avoid detachment of the connecting shaft 9. When the pulling device 4 drives the connecting shaft 9 to move towards the proximal end of the sleeve 3, the barbs are squeezed and straightened, and the connecting shaft 9 is separated from the proximal end of the sleeve 3.

Example six

A hemostatic clip comprising a handle assembly and the hemostatic clip assembly described above, the handle assembly driving a pulling device 4 in the hemostatic clip assembly to reciprocate. The handle assembly specifically comprises an outer tube 10 and a stay cable 11, one end of the connecting shaft 9 is connected with the sleeve 3, the other end of the connecting shaft is connected with the outer tube 10, and the stay cable 11 penetrates through the outer tube 10 to be connected with the traction device 4. The proximal end of the pull cable 11 is provided with a handle by which the reciprocating movement of the pulling device 4 is controlled. The outer tube 10 is typically a relatively flexible spring tube.

In the description of the present invention, it should be understood that the terms "center," "vertical," "horizontal," "inner," "outer," "axial," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In this specification, a schematic representation of the terms does not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.

With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a hemostatic clip subassembly, includes sleeve (3), two formula clamp (1) and with the tractive device (4) that two formula clamp (1) are connected, two formula clamp (1) and tractive device (4) at least part accept in sleeve (3), its characterized in that: the two-piece clamp (1) comprises a fixing piece (101) and two clamping pieces (102) which are connected through the fixing piece (101) and are oppositely arranged, wherein each clamping piece (102) comprises a first clamping section (1021) close to the distal end and a second clamping section (1022) close to the proximal end; a fixing piece (101) is arranged on the second clamping section (1022) in a penetrating way;

each second clamping section (1022) is provided with a first locking mechanism (2) and a second locking mechanism (7) which are arranged oppositely, and one end of the traction device (4) is detachably connected with the two-piece type clamp (1) through the second locking mechanism (7) and enables the two first locking mechanisms (2) to be close to each other;

the sleeve (3) is provided with a third locking mechanism (301), the two-piece clamp (1) moves towards the near end under the action of the pulling device (4) in the process that the pulling device (4) is separated from the second locking mechanism (7), and the sleeve (3) forces the two first clamp sections (1021) to be gradually close to each other;

after the traction device (4) is separated from the second locking mechanism (7), the two first locking mechanisms (2) are far away from each other, and the first locking mechanism (7) and the third locking mechanism (301) are matched to fix the two-piece type clamp (1) and the sleeve (3).

2. A hemostatic clip assembly according to claim 1 wherein: the fixing piece (101) is a pin shaft, and the second clamping section (1022) is provided with a shaft hole (5) for the pin shaft to pass through.

3. A hemostatic clip assembly according to claim 2 wherein: the third locking mechanism (301) is a clamping groove, and the first locking mechanism (2) is a clamping hook.

4. A hemostatic clip assembly according to claim 1 wherein: the traction device (4) comprises a rod part (4011) and a connecting part which are connected with each other, and the connecting part is matched with the second locking mechanism (7) so as to connect the traction device (4) with the two-piece clamp (1); the connection portion is deformable and is disengaged from the second locking mechanism (7) under a proximally directed pulling force.

5. A hemostatic clip assembly according to claim 4 wherein: the pulling device (4) is composed of two pulling plates (401) which are used for clamping two second clamping sections (1022) in the middle, and each pulling plate (401) comprises one rod part (4011) and a connecting part.

6. A hemostatic clip assembly according to claim 4 wherein: the second locking mechanism (7) is a matching hole, and the connecting part comprises a plugboard (4013) inserted into the matching hole.

7. A hemostatic clip assembly according to claim 6 wherein: the insertion plates (4013) of the two pull plates (401) are arranged in parallel and oppositely, in a V-shaped, herringbone or splayed manner in the matching holes.

8. A hemostatic clip assembly according to claim 4 wherein: the connecting portion further comprises a limiting plate (8) extending towards the fixing piece (101), the limiting plate (8) is provided with an opening, the opening faces the fixing piece (101), and the fixing piece (101) is in clearance fit with the limiting plate (8).

9. A hemostatic clip assembly according to claim 1 wherein: the traction device is characterized by further comprising a connecting shaft (9) axially limited at the proximal end of the sleeve (3), wherein the connecting shaft (9) is provided with a central shaft (901) for the traction device (4) to pass through, and the traction device (4) can drive the connecting shaft (9) to move towards the proximal end of the sleeve (3) so as to separate the connecting shaft (9) from the sleeve (3).

10. A hemostatic clip, characterized in that: comprising a handle assembly and the hemostatic clip assembly according to any one of claims 1-9, said handle assembly driving a pulling device (4) in the hemostatic clip assembly to reciprocate.