CN115137438A - Clamping device and anastomosis clamp for endoscope - Google Patents

Abstract

The invention relates to the technical field of endoscope suturing, and provides a clamping device and an anastomosis clamp for an endoscope, wherein the clamping device comprises a sleeve, a forceps head frame and a pull rod, and a transmission mechanism is used for converting the movement of the pull rod into driving a clamping arm to rotate; when the forceps head frame is at an operation position, the stopping teeth are embedded in the tooth sockets at the front ends of the tooth socket groups; in the process of backward movement of the pull rod, when the clamping arm cannot rotate along the closing direction, the tong head frame overcomes the resistance between the stop tooth and the tooth socket and moves backward, so that the sleeve is arranged outside the clamping arm to prevent the clamping arm from rotating along the opening direction.

Description

Clamping device and anastomosis clamp for endoscope

Technical Field

The invention relates to the technical field of endoscopic suturing, and provides a clamping device and an anastomotic clamp for an endoscope, which comprises the clamping device.

Background

The endoscope anastomosis clamp is widely applied to endoscopic minimally invasive surgery and mainly comprises a handle component, a clamping arm component and a locking structure for locking the clamping arm component in a closed state, wherein the handle component can control the clamping arm component to be closed or opened; the existing endoscope anastomosis clamp generally adopts locking structures of the type such as ratchet one-way locking clamping arms or elastic sheets abutting clamping arms, and locks the clamping arms in a closed state, however, the size of the clamping arm assembly is very small, the size of the locking structure is limited, the locking structure is poor in reliability and prone to failure, once the locking structure fails, the clamping arms in the closed state are loosened, medical accidents are further caused, and great potential safety hazards are achieved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the problem that the locking structure of the clamping device in the prior art is easy to lose efficacy, a clamping device and an anastomosis clamp for an endoscope comprising the clamping device are provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a clipping device comprising:

a sleeve;

the rear end of the forceps head frame is slidably arranged in the sleeve, the front end of the forceps head frame is hinged with two clamping arms, one of the forceps head frame and the sleeve is fixedly provided with a stopping tooth, the other one of the forceps head frame and the sleeve is provided with a tooth groove group, the tooth groove group is provided with at least one tooth groove for the stopping tooth to be embedded into in the sliding direction of the forceps head frame, and when the stopping tooth is embedded into the tooth groove, the stopping tooth is suitable for being propped by the inner wall of the front side of the tooth groove and cannot move forwards, but is allowed to move backwards by overcoming resistance;

the pull rod is connected with the clamping arm through a transmission mechanism, and the transmission mechanism is used for converting the movement of the pull rod into driving the clamping arm to rotate;

when the forceps head frame is positioned at the operation position, the stopping teeth are embedded into the tooth grooves, and at least one part of the clamping arms is positioned outside the sleeve, so that the clamping arms are allowed to rotate along the opening direction when the pull rod moves forwards or rotate along the clamping direction when the pull rod moves backwards;

after the pull rod moves backwards until the clamping arms are closed to clamp human tissues, the tong head frame overcomes the resistance between the stop teeth and the tooth grooves and moves backwards, so that the sleeve is sleeved outside the clamping arms to prevent the clamping arms from rotating in the opening direction.

In the scheme, the clamping head frame is connected with the sleeve by matching the stopping teeth and the tooth grooves, so that the clamping head frame can only move backwards to enter the sleeve, the clamping arms are maintained in a closed state by means of interference caused by opening of the sleeve on the clamping arms, and the sleeve is of a closed-loop structure, so that the strength is high, the sleeve surrounds the clamping arms, and the clamping arms can be ensured to be locked in the closed state.

Furthermore, an elastically deformable limiting sheet is arranged in the sleeve, and when the forceps head frame is positioned at the operation position, the limiting sheet supports the end part of the rear end of the forceps head frame; the arrangement of the limiting piece can cause certain resistance to the backward movement of the forceps head frame, and the forceps head frame cannot move forward, so that the forceps head frame can be temporarily positioned, the movement amount of the pull rod can be accurately converted into the rotation amount of the clamping arm, the control performance is improved, the forceps head frame is prevented from easily entering the sleeve backwards, and misoperation is reduced; in addition, the limiting sheet can also support the forceps head frame, so that the gap between the stopping teeth and the tooth sockets is eliminated, the movement amount of the pull rod can be converted into the rotation amount of the clamping arm by hundreds of percent, the control of opening and closing of the clamping arm by an operator is facilitated, and the success rate of the operation is increased.

In order to facilitate manufacturing and assembly simplification, a window is formed in the peripheral wall of the sleeve, a part of the peripheral wall of the sleeve, where the window is located, is bent inwards to form a limiting piece capable of elastically deforming, and one end of the limiting piece is connected with the front inner wall of the window.

In order to prevent the forceps head frame from rotating in the process of moving backwards to cause dislocation of the stop teeth and the tooth sockets, a sliding protrusion is further arranged at the rear end of the forceps head frame, a sliding groove matched with the sliding protrusion is formed in the sleeve, and the sliding protrusion is slidably mounted in the sliding groove along the front-back direction.

Further, the rear side surface of the stopping tooth is an inclined surface which is inclined inward from front to rear.

In order to release the sleeve, the clamping arm and the tong head frame as an integral module, the tong head frame further comprises a clamping piece, a rotating sleeve is inserted into the rear end of the sleeve, an inner hole penetrates through the outer peripheral wall of the rotating sleeve, an outer hole is formed in the outer periphery of the sleeve, and the front end face of the rotating sleeve is used for being abutted by the tong head frame;

the clamping piece is provided with an elastic piece which extends forwards, the front end of the elastic piece is bent outwards to form an elastic clamping part, the clamping part sequentially penetrates through the inner hole and the outer hole outwards to axially position the rotary sleeve on the sleeve, the pull rod penetrates through the clamping piece, the pull rod is provided with a step surface which is abutted against the front end face of the clamping piece, and the step surface is positioned on the front side of the clamping piece;

the pull rod is detachably connected with the transmission mechanism through a detachable structure, and when the pull rod moves backwards, the pull rod is detached from the transmission mechanism when the pulling force applied to the detachable mechanism exceeds a preset value.

In case the pull rod breaks away from the back with drive mechanism, the pull rod independently removes backward to when the step face was in the front side end face butt of joint spare, the pull rod drove joint spare and moves backward in the lump, the shell fragment then can produce elastic deformation and break away from until joint portion and hole and outer hole, thereby releases the sleeve.

Furthermore, each pull rod is in transmission connection with one clamping arm through a transmission mechanism, the two clamping arms are hinged to the clamp head frame through a pivot shaft, the front side part of each clamping arm on the pivot shaft is the front end of the corresponding clamping arm, and the rear side part of each clamping arm on the pivot shaft is the rear end of the corresponding clamping arm;

the transmission mechanism comprises a front shaft, a connecting rod and a rear shaft, the front end of the connecting rod is hinged with the front end of the clamping arm through the front shaft, the rear end of the connecting rod is hinged with the front end of the pull rod through the rear shaft, and the rear shaft is connected with the forceps head frame in a sliding mode along the front-rear direction.

Furthermore, an intermediate rod is fixed on the clamping piece, and the front end of the intermediate rod is suitable for being clamped by the front ends of the two clamping arms.

In order to allow the intermediate rod to be drawn out from between the two clamp arms, the outer peripheral surface of the intermediate rod located between the front ends of the two clamp arms is a circumferential surface.

Further, the detachable structure comprises a notch arranged at the end part of the front end of the pull rod, the front end of the pull rod is provided with a connecting hole matched with the rear shaft, the rear shaft is inserted into the connecting hole, the notch is communicated with the connecting hole, and the maximum width of the notch is smaller than the diameter of the rear shaft.

The invention also provides an anastomosis clip for an endoscope, which comprises the clip device.

The invention has the beneficial effects that: the clamping device of the invention utilizes the matching of the stopping teeth and the tooth grooves to connect the forceps head frame and the sleeve, so that the forceps head frame can only move backwards to enter the sleeve, thereby maintaining the clamping arms in a closed state by means of the interference of the sleeve on the opening of the clamping arms.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a three-dimensional schematic view of one side of a clamping device of the present invention;

FIG. 2 is a schematic three-dimensional view of the other side of the clamping device of the present invention;

FIG. 3 is a schematic front view of a clamping device of the present invention;

FIG. 4 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 3;

FIG. 5 is an enlarged partial schematic view of B in FIG. 4;

FIG. 6 is a schematic sectional view taken along line C-C in FIG. 4;

FIG. 7 is a schematic view of the linkage connecting the clamping arms via the drive mechanism;

FIG. 8 is a schematic view of the attachment of the pull rod to the rear axle of the present clamping assembly;

FIG. 9 is a three-dimensional schematic view of a sleeve in the clamping device of the present invention;

FIG. 10 is a three-dimensional schematic view of a jaw frame of the clamping device of the present invention;

FIG. 11 is a schematic view of the clamping device of the present invention connected to a handle assembly;

FIG. 12 is a cross-sectional view of the jaw frame in an operative position with the collet open and the clamp arms open;

FIG. 13 is a schematic drawing showing the sleeve broken away with the jaw frame in the operative position and the clamp arms closed;

FIG. 14 is a schematic view of the jawarm in the operative position with the clamping arms closed;

FIG. 15 is a schematic view of the jawarm as it moves rearwardly into the interior of the sleeve;

FIG. 16 is a schematic view of the sleeve shown in section with the jawarm moved rearwardly into the interior of the sleeve;

figure 17 is a schematic view of the sleeve when released.

In the figure: 1. the device comprises a sleeve, 101, tooth grooves, 102, windows, 103, limiting pieces, 104, sliding grooves, 105 and outer holes;

2. theforceps head frame 201, thestop tooth 201a, theinclined surface 202, thesliding protrusion 203, thebracket 204 and the stroke groove;

3. clamping arms;

4. apull rod 401, astep surface 402, a connectinghole 403 and a notch;

5. theclamping piece 501, theelastic piece 502 and the clamping part;

6. a rotatingsleeve 601, an inner hole;

7. pivot axis, 8, front axle, 9, connecting rod, 10, rear axle, 11, intermediate lever, 12, spring tube, 13, handle, 14, sliding ring.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings which illustrate the basic structure of the present invention only in a schematic manner, and thus show only the constituents related to the present invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Example 1

As shown in fig. 1-3, a clamping device includes:

asleeve 1;

theforceps head frame 2 is characterized in that the rear end of theforceps head frame 2 is slidably mounted in thesleeve 1, two clampingarms 3 are hinged to the front end of theforceps head frame 2, one of theforceps head frame 2 and thesleeve 1 is fixedly provided with a stoppingtooth 201, the other one of theforceps head frame 2 and thesleeve 1 is provided with a tooth groove group, the tooth groove group is provided with at least onetooth groove 101 for the stoppingtooth 201 to be embedded into in the sliding direction of theforceps head frame 2, when the stoppingtooth 201 is embedded into thetooth groove 101, the stoppingtooth 201 moves forwards and can abut against the inner wall of the front side of thetooth groove 101 and cannot be separated from thetooth groove 101, but the stoppingtooth 201 is allowed to move backwards to be separated from thetooth groove 101 after certain resistance is overcome;

in the embodiment, thestop tooth 201 is fixed or integrally formed on theforceps head frame 2, and thetooth socket 101 is arranged on thesleeve 1, so that when thestop tooth 201 is located in thetooth socket 101, theforceps head frame 2 cannot move forward under the blocking of thetooth socket 101; theforceps head frame 2 and thesleeve 1 can both adopt metal or metal alloy;

thepull rod 4 is connected with theclamping arm 3 through a transmission mechanism, and the transmission mechanism is used for converting the movement of thepull rod 4 into the rotation of theclamping arm 3;

when theforceps head 2 is in the operating position, thestop tooth 201 is embedded in thegullet 101 at the front end of the gullet group, and at least a part of theclamping arm 3 is positioned outside thesleeve 1, so that theclamping arm 3 is allowed to rotate in the opening direction when thepull rod 4 moves forwards, and theclamping arm 3 is also allowed to rotate in the clamping direction when thepull rod 4 moves backwards;

the process that thepull rod 4 drives theforceps head frame 2 to move into thesleeve 1 is as follows: in the process that thepull rod 4 moves backwards, the clampingarms 3 are gradually closed (namely the clampingarms 3 pulled by the movedpull rod 4 move towards the other clampingarms 3 which are not moved and pulled) until the human tissue is clamped, once the human tissue is clamped, the clampingarms 3 cannot continuously rotate in the closing direction, and as the pulling force which is applied to thepull rod 4 to enable thepull rod 4 to move backwards is increased, theforceps head frame 2 can overcome the resistance between the stoppingteeth 201 and thetooth grooves 101 to move backwards, so that thesleeve 1 is sleeved outside the clampingarms 3 to prevent the clampingarms 3 from rotating in the opening direction;

it should be noted that the rotation of theclamping arm 3 in the closing direction and the rotation in the opening direction in the present embodiment are defined as follows: pin joint betweenarm lock 3 and the tong-head frame 2 is first pin joint, and the position that lies in first pin joint front side on thearm lock 3 is the front end ofarm lock 3, and the position that lies in first pin joint rear side on thearm lock 3 is the rear end ofarm lock 3, andarbitrary arm lock 3 rotates along closed direction and can show that the interval between twoarm lock 3 front ends diminishes gradually, andarbitrary arm lock 3 rotates along opening the direction and can show that the interval between twoarm lock 3 front ends enlarges gradually.

As shown in fig. 12, an elastically deformable stopper 103 is disposed in the sleeve 1, and when the forceps head holder 2 is in the operating position, the stopper 103 holds the rear end of the forceps head holder 2; by means of the arrangement of the limiting piece 103, certain resistance can be caused to the backward movement of the forceps head frame 2, and the forceps head frame 2 cannot move forward, so that the forceps head frame 2 can be temporarily positioned, the movement amount of the pull rod 4 can be accurately converted into the rotation amount of the clamping arm 3, that is, the forceps head frame 2 is ensured not to move when being positioned at an operation position, the problem that the pull rod 4 drives the forceps head frame 2 to move when the clamping arm 3 does not clamp human tissues is solved, the operation performance is improved, the forceps head frame 2 is prevented from easily entering the sleeve 1 backwards, and misoperation is reduced; in addition, the limiting piece 103 can also support the forceps head frame 2, so that the gap between the stopping tooth 201 and the tooth socket 101 is eliminated, the movement amount of the pull rod 4 can be converted into the rotation amount of the clamping arm 3 by hundreds of percent, the opening and closing of the clamping arm 3 can be controlled by an operator, and the success rate of the operation is increased.

As shown in fig. 6 and 9, awindow 102 is formed on the outer circumferential wall of thesleeve 1, a portion of the outer circumferential wall of thesleeve 1, where thewindow 102 is located, is bent inward to form an elastically deformable limitingpiece 103, and one end of the limitingpiece 103 is connected to the front inner wall of thewindow 102, so as to facilitate manufacturing and simplify the assembly process.

As shown in fig. 10, in consideration of the compactness of the lifting structure, the strength of the liftingsleeve 1, the ease of manufacturing, etc., thesleeve 1 is preferably designed such that the inner peripheral surface is a circumferential surface and the rear end of the outer peripheral surface of thebit holder 2 has a circumferential surface, and in this case, the circumferential surface of the outer peripheral surface of thebit holder 2 is located in a portion which is slidably engaged with the inner peripheral surface of thesleeve 1, but this structure has a problem in that: in order to solve the problem that theforceps head frame 2 is easy to rotate in the process of moving backwards, so that the stoppingteeth 201 and thetooth grooves 101 are dislocated, a slidingprotrusion 202 is arranged at the rear end of theforceps head frame 2, a slidinggroove 104 matched with the slidingprotrusion 202 is arranged on thesleeve 1, and the slidingprotrusion 202 is slidably arranged in the slidinggroove 104 in the front-back direction; thereby restraining theforceps head holder 2 with only a degree of freedom of movement in the front-rear direction; it should be noted that a profile connection between thesleeve 1 and thebinding clip frame 2 may also be used. In this embodiment, a plurality oftooth grooves 101 are distributed at intervals in the sliding direction of theforceps head frame 2, and the other side opposite to thetooth grooves 101 is provided with a slidinggroove 104, so that when theforceps head frame 2 slides in the axial direction relative to thesleeve 1, the slidinggroove 104 is located at one side to limit theforceps head frame 2, and the situation that theforceps head frame 2 is dislocated and deflected in the sliding in the axial direction to cause subsequent release failure does not occur.

As shown in fig. 5, the rear side surface of the stoppingtooth 201 is aninclined surface 201a, theinclined surface 201a is inclined inward from front to rear, and the front side surface of the stoppingtooth 201 is preferably perpendicular to the axis of thesleeve 1 and parallel to the front inner wall of thetooth slot 101; therefore, in the process that theforceps head frame 2 moves backwards, the component force generated by theinclined surface 201a can force theforceps head frame 2 to elastically deform inwards, so that thestop tooth 201 can move towards thenext tooth groove 101 beyond thecurrent tooth groove 101; in the present embodiment, theforceps head frame 2 has twobrackets 203, and thestop tooth 201 is located on one of thebrackets 203, which corresponds to a cantilever structure, so that when theforceps head frame 2 moves backwards, thestop tooth 201 goes over thefront tooth space 101; the slidingprotrusion 202 may be disposed on anotherbracket 203, so that the slidingprotrusion 202 and the stoppingtooth 201 are designed to have the same structure and symmetrical to each other, thereby facilitating manufacture and assembly.

As shown in fig. 6, the clamp device further comprises a clampingmember 5, arotating sleeve 6 is inserted into the rear end of thesleeve 1, aninner hole 601 penetrates through the outer peripheral wall of therotating sleeve 6, anouter hole 105 is formed in the outer periphery of thesleeve 1, and the front end face of therotating sleeve 6 is used for being abutted by thetong head frame 2;

anelastic sheet 501 extends forwards on theclamping piece 5, anelastic clamping part 502 is bent outwards at the front end of theelastic sheet 501, the clampingpart 502 penetrates through theinner hole 601 and theouter hole 105 outwards in sequence, so that therotary sleeve 6 is axially positioned on thesleeve 1, thepull rod 4 penetrates through theclamping piece 5, astep surface 401 used for being abutted against the front side end surface of theclamping piece 5 is arranged on thepull rod 4, and thestep surface 401 is positioned on the front side of theclamping piece 5;

thepull rod 4 is detachably connected with the transmission mechanism through a detachable structure, and thepull rod 4 is detached from the transmission mechanism when the pulling force applied to the detachable structure exceeds a preset value along with the backward movement of thepull rod 4; once pullrod 4 breaks away from the back with drive mechanism, pullrod 4 backward independent removal to whenstep face 401 and the front side terminal surface butt ofjoint spare 5, pullrod 4 drivesjoint spare 5 and moves backward in the lump,shell fragment 501 then can produce elastic deformation and break away from withhole 601 andouter hole 105 simultaneously untiljoint portion 502, thereby releasessleeve 1.

As shown in fig. 4 and 7, eachpull rod 4 is in transmission connection with oneclamping arm 3 through a transmission mechanism, the two clampingarms 3 are both hinged to thejaw frame 2 through apivot shaft 7, the front part of theclamping arm 3 located on thepivot shaft 7 is the front end of theclamping arm 3, and the rear part of theclamping arm 3 located on thepivot shaft 7 is the rear end of theclamping arm 3; in this embodiment, the axis of thepivot shaft 7 is arranged along the radial direction of thesleeve 1, and two ends of thepivot shaft 7 are respectively inserted into the twobrackets 203 of thebinding clip frame 2, so as to improve the stability of installation;

the transmission mechanism comprises a front shaft 8, a connecting rod 9 and a rear shaft 10, the front end of the connecting rod 9 is hinged with the front end of the clamping arm 3 through the front shaft 8, the rear end of the connecting rod 9 is hinged with the front end of the pull rod 4 through the rear shaft 10, and the rear shaft 10 is connected with the forceps head frame 2 in a sliding mode along the front-rear direction; therefore, the pull rod 4 drives the connecting rod 9 to move backwards through the rear shaft 10, and the connecting rod 9 pulls the clamping arm 3 to rotate around the pivot shaft 7 so as to realize opening or closing; in this embodiment, two sides of the jaw frame 2 or two brackets 203 on the jaw frame 2 are respectively and independently provided with a stroke slot 204 for the rear shaft 10 to move back and forth, the rear shafts 10 of the two transmission mechanisms are respectively inserted into the stroke slots 204 of the side brackets 203 where the rear shafts 10 are located, the rear shafts 10 are slidably connected with the stroke slots 204 where the rear shafts are located, and the stroke slots 204 can limit the connecting rod 9, so that the clamping arm 3 rotates within a design range.

Amiddle rod 11 is fixed on theclamping piece 5, and themiddle rod 11 extends to the position between the front ends of the two clampingarms 3; so that two human tissues can be clamped together; preferably, the outer peripheral surface of themiddle rod 11 between the front ends of the two clampingarms 3 is a circumferential surface, so that themiddle rod 11 can be conveniently drawn out from between the two clampingarms 3.

The detachable structure may adopt an example provided in this embodiment, specifically, as shown in fig. 8, the detachable structure includes anotch 403 provided at a front end portion of thepull rod 4, the front end of thepull rod 4 is provided with a connectinghole 402 matched with therear axle 10, therear axle 10 is inserted into the connectinghole 402, thenotch 403 is communicated with the connectinghole 402, and a maximum width of thenotch 403 is smaller than a diameter of therear axle 10.

As shown in fig. 11, in this embodiment, the connectingrod 9 can be used with a handle assembly, aspring tube 12 is disposed between the handle assembly and therotating sleeve 6 on thesleeve 1, an operating wire is disposed in thespring tube 12, twopull rods 4 are respectively and fixedly connected with an operating wire, the handle assembly has ahandle 13 and two slidingrings 14 slidably mounted on thehandle 13, and the two operating wires are respectively fixed on the two slidingrings 14, so that when the slidingrings 14 are moved forward and backward, the operating wire can drive the connectingrod 9 to move forward and backward, and medical staff can operate and control by using the slidingrings 14, and the specific working principle is as follows:

as shown in fig. 12-14, theforceps head 2 is in the operating position, the stoppingtooth 201 is embedded in thetooth socket 101 at the front end of the tooth socket set, the limitingpiece 103 holds the rear end of theforceps head 2, the clampingarms 3 are opened along with the forward movement of thepull rod 4 so as to re-clamp the human tissue, and when thepull rod 4 moves backwards, the clampingarms 3 are closed to clamp the human tissue;

as shown in fig. 15-16, after the two clampingarms 3 clamp the human tissue, as the pulling force applied to thepull rod 4 is increased, the force transmitted from thepull rod 4 to theforceps head holder 2 overcomes the resistance of theforceps head holder 2 moving backwards, theforceps head holder 2 moves backwards along with thepull rod 4, the limitingpiece 103 is pressed outwards by theforceps head holder 2 to deform, and the clampingarms 3 in the closed state on theforceps head holder 2 enter thesleeve 1, so that thesleeve 1 restrains the clampingarms 3, and the clampingarms 3 are maintained in the closed state;

normally, as shown in fig. 16, when thebinding clip frame 2 moves backward to contact with the front end of therotary sleeve 6, thestop tooth 201 is embedded in thecorresponding tooth socket 101, the bindingclip frame 2 cannot move backward under the block of therotary sleeve 6, the pulling force applied to thepull rod 4 is increased again, as shown in fig. 17, thenotch 403 at the front end of thepull rod 4 is deformed, therear shaft 10 is separated from thepull rod 4 from thenotch 403, then thepull rod 4 moves backward independently, and when thestep 401 abuts against the front end of thebinding clip 5, thepull rod 4 drives thebinding clip 5 to move backward together, thespring plate 501 elastically deforms until thebinding clip 502 is separated from theinner hole 601 and theouter hole 105, thereby separating thesleeve 1 from therotary sleeve 6, completing the release of thesleeve 1, and themiddle rod 11 moves backward along with thebinding clip 5, so as to realize the extraction from between the two clampingarms 3.

Under special circumstances, if the human tissue clamped by theclip arms 3 is very large, when theforceps head holder 2 enters thesleeve 1 backwards, after the twoclip arms 3 enter thesleeve 1 backwards for a certain distance, thestop teeth 201 are embedded into the correspondingtooth grooves 101, the edge of the front end opening of thesleeve 1 is easily clamped with the twoclip arms 3, theforceps head holder 2 cannot move backwards continuously, the pulling force applied to thepull rod 4 is increased again, thenotch 403 at the front end of thepull rod 4 is deformed, therear shaft 10 is separated from thepull rod 4 from thenotch 403, thepull rod 4 moves backwards independently, when thestep surface 401 abuts against the front end surface of theclip element 5, thepull rod 4 drives theclip element 5 to move backwards together, theelastic sheet 501 is elastically deformed until theclip portion 502 is separated from theinner hole 601 and theouter hole 105, so that thesleeve 1 is separated from therotary sleeve 6, the release of thesleeve 1 is completed, and theintermediate rod 11 moves backwards along with theclip element 5, so as to be drawn out from between the twoclip arms 3.

Example 2

An anastomosis clip for an endoscope, comprising the clip device ofembodiment 1 above.

While the preferred embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made herein without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. A clamping device, characterized in that: the method comprises the following steps:

a sleeve (1);

the rear end of the forceps head frame (2) is slidably mounted in the sleeve (1), two clamping arms (3) are hinged to the front end of the forceps head frame (2), one of the forceps head frame (2) and the sleeve (1) is fixedly provided with a stopping tooth (201), the other one of the forceps head frame (2) and the sleeve (1) is provided with a tooth groove group, the tooth groove group is provided with at least one tooth groove (101) for the stopping tooth (201) to be embedded into in the sliding direction of the forceps head frame (2), when the stopping tooth (201) is embedded into the tooth groove (101), the stopping tooth (201) is suitable for being supported by the inner wall of the front side of the tooth groove (101) and cannot move forwards, but the stopping tooth (201) is allowed to move backwards against resistance;

the pull rod (4) is connected with the clamping arm (3) through a transmission mechanism, and the transmission mechanism is used for converting the movement of the pull rod (4) into the rotation of the driving clamping arm (3);

when the forceps head frame (2) is in an operation position, the stop tooth (201) is embedded into the tooth groove (101), and at least one part of the clamping arm (3) is positioned outside the sleeve (1) so as to allow the clamping arm (3) to rotate in an opening direction when the pull rod (4) moves forwards or rotate in a clamping direction when the pull rod (4) moves backwards;

after the pull rod (4) moves backwards until the clamping arms (3) finish closing and clamping human tissues, the forceps head frame (2) overcomes the resistance between the stop teeth (201) and the tooth grooves (101) and moves backwards, so that the sleeve (1) is sleeved outside the clamping arms (3) to prevent the clamping arms (3) from rotating in the opening direction.

2. A clamping device according to claim 1, characterised in that: the sleeve (1) is internally provided with a deformable limiting sheet (103), and when the forceps head frame (2) is positioned at an operation position, the limiting sheet (103) supports the rear end part of the forceps head frame (2).

3. A clamping device according to claim 2, characterised in that: a window (102) is formed in the outer peripheral wall of the sleeve (1), a part, located on the window (102), of the outer peripheral wall of the sleeve (1) is bent inwards to form a limiting piece (103) capable of elastically deforming, and one end of the limiting piece (103) is connected with the inner wall of the front side of the window (102).

4. A clamping device according to claim 2, characterised in that: the rear end of the forceps head frame (2) is provided with a sliding protrusion (202), the sleeve (1) is provided with a sliding groove (104) matched with the sliding protrusion (202), and the sliding protrusion (202) is slidably installed in the sliding groove (104) along the front-back direction.

5. A clamping device according to claim 1, characterised in that: the rear side surface of the stop tooth (201) is an inclined surface (201 a), and the inclined surface (201 a) is inclined inwards from front to back.

6. A clamping device according to claim 1, characterised in that: the clamp is characterized by further comprising a clamping piece (5), a rotary sleeve (6) is inserted into the rear end of the sleeve (1), an inner hole (601) penetrates through the outer peripheral wall of the rotary sleeve (6), an outer hole (105) is formed in the outer periphery of the sleeve (1), and the front end face of the rotary sleeve (6) is used for being abutted to the tong head frame (2);

the clamping piece (5) is provided with an elastic sheet (501) extending forwards, the front end of the elastic sheet (501) is outwards bent to form an elastic clamping portion (502), the clamping portion (502) outwards penetrates through an inner hole (601) and an outer hole (105) in sequence, so that the rotary sleeve (6) is axially positioned on the sleeve (1), the pull rod (4) penetrates through the clamping piece (5), the pull rod (4) is provided with a step surface (401) used for being abutted to the front end face of the clamping piece (5), and the step surface (401) is located on the front side of the clamping piece (5);

the pull rod (4) is detachably connected with the transmission mechanism through a detachable structure, and when the pull rod (4) moves backwards, the pull rod (4) is detached from the transmission mechanism when the pulling force applied to the detachable mechanism exceeds a preset value.

7. A clipping device according to claim 6, wherein: each pull rod (4) is in transmission connection with one clamping arm (3) through a transmission mechanism, the two clamping arms (3) are hinged to the clamp head frame (2) through a pivot shaft (7), the front side part of each clamping arm (3) located on the pivot shaft (7) is the front end of each clamping arm (3), and the rear side part of each clamping arm (3) located on the pivot shaft (7) is the rear end of each clamping arm (3);

the transmission mechanism comprises a front shaft (8), a connecting rod (9) and a rear shaft (10), the front end of the connecting rod (9) is hinged to the front end of the clamping arm (3) through the front shaft (8), the rear end of the connecting rod (9) is hinged to the front end of the pull rod (4) through the rear shaft (10), and the rear shaft (10) is connected with the forceps head frame (2) in a sliding mode in the front-rear direction.

8. A clipping device according to claim 6, wherein: the clamping piece (5) is fixedly provided with an intermediate rod (11), and the front end of the intermediate rod (11) is suitable for being clamped by the front ends of the two clamping arms (3).

9. The clipping device of claim 7, wherein: the detachable structure comprises a notch (403) arranged at the end part of the front end of the pull rod (4), the front end of the pull rod (4) is provided with a connecting hole (402) matched with the rear shaft (10), the rear shaft (10) is inserted into the connecting hole (402), the notch (403) is communicated with the connecting hole (402), and the maximum width of the notch (403) is smaller than the diameter of the rear shaft (10).

10. An anastomosis clip for an endoscope, characterized by: comprising a clipping device according to any one of claims 1 to 9.

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