CN215384422U

CN215384422U - Surgical minimally invasive grasping forceps with linkage mechanism

Info

Publication number: CN215384422U
Application number: CN202022782232.0U
Authority: CN
Inventors: 徐万海
Original assignee: Fourth Hospital of Hebei Medical University Hebei Cancer Hospital
Current assignee: Fourth Hospital of Hebei Medical University Hebei Cancer Hospital
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2022-01-04
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a surgical minimally invasive grasping forceps with a linkage mechanism. It has solved the not good problem of effect of traditional chinese medical science with nipper linkage. It includes the location handle, location handle one end is rotated through the dowel and is connected with movable handle, location handle tip is equipped with the connecting rod that is the vertical direction extension with the location handle, and connecting rod one end is equipped with movable clamp subassembly, the connecting rod tip links to each other with movable clamp subassembly through rotating the aggregate unit, and rotate aggregate unit one end and link to each other with the rotation locating component who sets up in dowel week outside through the location stay cord, the other end links to each other with the fixing pin that sets up at movable handle tip through the linkage stay cord, and be equipped with handle reset structure between movable handle and the location handle. The utility model has the advantages that: the linkage effect is good, and the stability is good.

Description

Surgical minimally invasive grasping forceps with linkage mechanism

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a pair of minimally invasive surgical grasping forceps with a linkage mechanism.

Background

In the direct-view minimally invasive laparoscopic human body surgery, tissue organs which are necrotic or have been diseased in the abdominal cavity of a human body need to be grabbed, so that the tissue organs cannot be separated and fall off, and the surgery can be smoothly performed. The prior art adopts ordinary grasping forceps to grasp, and its defect is that ordinary grasping forceps rely on the tong hold the tooth to snatch, because the tong hold the tooth short and small, can make tissue organ break away from and drop when pulling, can not effectual snatch, satisfied ideal operation effect, in addition, because the linkage nature between clamp and the handle is not good, lead to the clamp to produce the phenomenon of coming loose easily at the in-process of centre gripping, influence centre gripping effect.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, chinese patent literature discloses a large-scale direct-view minimally invasive grasping forceps [ CN200920295580.6], which includes a positioning handle, a movable handle, a support block, a forceps lever, a pull rod, a fixed jaw, a movable jaw, a pull rod seat, a return spring, a resilient plate, and a rack, and is characterized in that: the fixed jaw and the movable jaw are both hook-shaped, and are provided with clamping teeth which are matched up and down; a flushing piece is also arranged and fixed on the supporting block.

The above scheme solves the problems that the medical grasping forceps in the prior art have short teeth and can cause the separation and falling of tissues and organs when being pulled, but the scheme still has a plurality of defects, such as: the clamping process is easy to cause the phenomenon of looseness, the clamping effect is influenced, and the linkage is poor.

Disclosure of Invention

The utility model aims to solve the problems and provides a pair of minimally invasive surgical grasping forceps with a linkage mechanism, which is reasonable in design and good in linkage effect.

In order to achieve the purpose, the utility model adopts the following technical scheme: this surgical minimal access grasping forceps with link gear, including the location handle, location handle one end is rotated through the shop bolt and is connected with movable handle, location handle tip is equipped with the connecting rod that is the vertical direction extension with the location handle, and connecting rod one end is equipped with movable clamp subassembly, the connecting rod tip links to each other with movable clamp subassembly through rotating the aggregate unit, and rotate aggregate unit one end and link to each other with the rotation locating component who sets up in the locating pin week outside through the location stay cord, the other end links to each other with the fixing pin who sets up at movable handle tip through the linkage stay cord, and be equipped with handle reset structure between movable handle and the location handle. The movable clamp assembly is clamped tightly by holding and pressing the movable handle and pulling the rotary linkage device to rotate by the linkage pull rope, and after the movable clamp assembly is clamped tightly, the movable clamp assembly can be positioned by the positioning pull rope and the rotary positioning assembly, so that the movable clamp assembly is kept in a clamping state, and the linkage is good and the stability is good.

In foretell surgical minimal access nipper with link gear, rotate linkage including the linkage sleeve, the linkage sleeve both ends are equipped with the spacing portion of linkage sleeve, and linkage sleeve circumference inner wall is equipped with the meshing internal tooth, and the inboard grafting of linkage sleeve circumference has a position sleeve, and position sleeve one end circumference outer wall is equipped with and meshes the meshing external tooth that the internal tooth is the dislocation set one by one, and the meshing internal tooth on the linkage sleeve meshes with the meshing external tooth on the position sleeve intermeshing. Synchronous rotation or fixation between the linkage sleeve and the positioning sleeve is realized by utilizing the mode that the meshing internal teeth and the meshing external teeth are meshed with each other, and the linkage property is good.

In the minimally invasive surgical grasping forceps with the linkage mechanism, one end of the positioning sleeve is exposed out of the linkage sleeve to form a connecting part, one end of the positioning pull rope is sleeved on the connecting part, the two ends of the positioning sleeve are provided with the positioning sleeve limiting parts, and the positioning sleeve limiting parts inserted into one end of the linkage sleeve are mutually attached to the linkage sleeve limiting parts. The arrangement of the position sleeve limiting part and the linkage sleeve can enable the positioning sleeve to be always positioned in the linkage sleeve, so that displacement is prevented from being generated during rotation.

In the minimally invasive surgical grasping forceps with the linkage mechanism, one end of the linkage pull rope is sleeved on the circumferential outer wall of the linkage sleeve.

In foretell surgical minimal access grasping forceps with link gear, rotate the locating component including pressing the sleeve, press sleeve one end to have and seal through pressing the splenium, the other end is connected with spacing sleeve, press the sleeve to peg graft in spacing sleeve, press sleeve circumference outer wall to be equipped with the bellying, be equipped with the arc movable groove on the spacing sleeve, the arc movable groove is close to one side of pressing the sleeve and is equipped with the constant head tank that is corresponding the setting with the bellying, the bellying sets up in the arc movable groove. The movable handle can be limited by the mutual matching of the pressing sleeve and the limiting sleeve, and the linkage sleeve and the positioning sleeve can be kept in a static state, so that the movable clamp assembly is kept in a clamping state.

In the minimally invasive surgical grasping forceps with the linkage mechanism, a return tension spring is axially arranged in the pressing sleeve, one end of the return tension spring is provided with a connecting rod, and one end of the connecting rod is fixedly connected with the inner wall of the sealing part at one end of the limiting sleeve. Through the setting of extension spring and connecting rod that resets, utilize to press the splenium and can make movable handle reset fast, the activity clamp subassembly loosens fast.

In the minimally invasive surgical grasping forceps with the linkage mechanism, one end of the positioning pull rope, which is far away from the movable forceps assembly, is arranged on the limiting sleeve and is positioned between the sealing part and the arc-shaped movable groove.

In foretell surgical minimal access grasping forceps with link gear, the connecting rod inner chamber upside is equipped with a plurality of equidistance and arranges last stay cord reference column, and the linkage stay cord passes last stay cord reference column in proper order and is connected with the fixed pin, and the connecting rod inner chamber downside is equipped with a plurality of equidistance and arranges the stay cord reference column down, and the stay cord of just fixing a position passes the stay cord reference column down in proper order and links to each other with spacing sleeve. The upper pull rope positioning column and the lower pull rope positioning column enable the linkage pull rope and the positioning pull rope to keep stable linear motion, and the device has a guiding effect.

In the minimally invasive surgical grasping forceps with the linkage mechanism, the movable forceps assembly comprises an upper forceps and a lower forceps, one end of the upper forceps is connected with the linkage sleeve, the lower forceps is connected with the positioning sleeve, and the corresponding sides of the upper forceps and the lower forceps are provided with the clamping teeth which are arranged in a staggered mode. The clamping force of the movable clamp assembly can be effectively enhanced by utilizing the clamping teeth arranged in a staggered manner.

In foretell surgical minimal access gripping tongs with link gear, handle reset structure is equipped with the arc reference column of pegging graft in the arc reference column on the activity handle including setting up the arc location sleeve on the location handle on, arc location sleeve bottom is equipped with reset spring, and reset spring supports with arc reference column tip and leans on the setting. Through the handle reset structure, the movable clamp can be reset as if the handle is quick, and the loosening speed of the movable clamp assembly is increased.

Compared with the prior art, the utility model has the advantages that: reasonable in design, simple structure, through pressing movable handle, utilize linkage stay cord pulling linkage sleeve to rotate, linkage sleeve drives the abutment sleeve and carries out synchronous rotation to realize the clamp of activity clamp subassembly tightly, can make the activity clamp subassembly keep pressing from both sides tight state through rotating mutually supporting of alignment assembly and location stay cord simultaneously, not only the linkage nature is effectual, and stability is good when using moreover.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the rotary linkage of the present invention;

fig. 3 is a schematic structural view of a rotational positioning assembly in the present invention.

In the figure, the positioning handle 1, the positioning pin 11, the movable handle 2, the connecting rod 3, the upper pull rope positioning column 31, the lower pull rope positioning column 32, the movable clamp assembly 4, the upper clamp 41, the lower clamp 42, the clamping teeth 43, the rotating linkage device 5, the positioning pull rope 51, the linkage pull rope 52, the linkage sleeve 53, the linkage sleeve limiting part 54, the meshing internal teeth 55, the positioning sleeve 56, the meshing external teeth 57, the connecting part 58, the positioning sleeve limiting part 59, the rotating positioning assembly 6, the pressing sleeve 61, the pressing part 62, the limiting sleeve 63, the protruding part 64, the arc-shaped movable groove 65, the positioning groove 66, the reset tension spring 67, the connecting rod 68, the sealing part 69, the handle reset structure 7, the arc-shaped positioning sleeve 71, the arc-shaped positioning column 72 and the reset spring 73 are arranged.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-3, the minimally invasive surgical grasping forceps with the linkage mechanism comprises a positioning handle 1, one end of the positioning handle 1 is rotatably connected with a movable handle 2 through a positioning pin 11, a connecting rod 3 extending in the vertical direction with the positioning handle 1 is arranged at the end of the positioning handle 1, a movable clamp assembly 4 is arranged at one end of the connecting rod 3, the end of the connecting rod 3 is connected with the movable clamp assembly 4 through a rotating linkage device 5, one end of the rotating linkage device 5 is connected with a rotating positioning assembly 6 arranged on the circumferential outer side of the positioning pin 11 through a positioning pull rope 51, the other end of the rotating linkage device is connected with a fixed pin 21 arranged at the end of the movable handle 2 through a linkage pull rope 52, and a handle resetting structure 7 is arranged between the movable handle 2 and the positioning handle 1. Through pressing movable handle 2 when gripping, movable handle 2 tip rotates along rotating positioning assembly 6 and rotates through linkage stay cord 52 pulling rotation linkage 5 to realize the clamp of activity clamp subassembly 4, and rotating positioning assembly 6 when activity clamp subassembly 4 presss from both sides tightly, utilizes location stay cord 51 to fix a position rotation linkage 5 and make activity clamp subassembly 4 keep the tight state of clamp, and the linkage is effectual, and stability is good.

Wherein, rotating linkage 5 and including linkage sleeve 53, linkage sleeve 53 both ends are equipped with linkage sleeve spacing portion 54, and linkage sleeve 53 circumference inner wall is equipped with meshing internal tooth 55, linkage sleeve 53 circumference inboard peg graft and have location sleeve 56, and location sleeve 56 one end circumference outer wall is equipped with and meshes the meshing external tooth 57 that internal tooth 55 is the dislocation set one by one, meshing internal tooth 55 on the linkage sleeve 53 and the meshing external tooth 57 intermeshing on the location sleeve 56. When the link sleeve 53 rotates, the positioning sleeve 56 rotates synchronously due to the meshing of the external teeth 57 and the meshing internal teeth 55 on the link sleeve 53, and when the link pull rope 52 pulls the link sleeve 5 to rotate counterclockwise, the positioning sleeve 56 rotates clockwise, so that the movable clamp assembly 4 is clamped.

As can be seen, one end of the positioning sleeve 56 is exposed out of the linkage sleeve 53 to form a connection portion 58, one end of the positioning pull rope 51 is sleeved on the connection portion 58, two ends of the positioning sleeve 56 are provided with positioning sleeve limiting portions 59, and the positioning sleeve limiting portions 59 inserted into one end of the linkage sleeve 53 are attached to the linkage sleeve limiting portions 54.

Further, one end of the linkage pulling rope 52 is sleeved on the circumferential outer wall of the linkage sleeve 53.

Obviously, the rotating positioning assembly 6 includes a pressing sleeve 61, one end of the pressing sleeve 61 is sealed by a pressing portion 62, the other end of the pressing sleeve 61 is connected with a limiting sleeve 63, the pressing sleeve 61 is inserted into the limiting sleeve 63, a protruding portion 64 is arranged on the circumferential outer wall of the pressing sleeve 61, an arc-shaped movable groove 65 is arranged on the limiting sleeve 63, a positioning groove 66 corresponding to the protruding portion 64 is arranged on one side of the arc-shaped movable groove 65, which is close to the pressing sleeve 61, and the protruding portion 64 is arranged in the arc-shaped movable groove 65. When the positioning slot 66 of the restraining sleeve 63 is rotated to a position corresponding to the boss 64, the movable clamp assembly 4 is in a clamping state.

Specifically, a return tension spring 67 is axially arranged in the pressing sleeve 61, one end of the return tension spring 67 is provided with a connecting rod 68, and one end of the connecting rod 68 is fixedly connected with the inner wall of a sealing part 69 at one end of the limiting sleeve 63. The extension spring 67 that resets will bellying 64 pulling to in the constant head tank 66, prevent spacing sleeve 63 gyration to spacing sleeve 56 is spacing, make movable clamp subassembly 4 remain the clamping state all the time.

In detail, an end of the positioning cord 51 remote from the movable clamp assembly 4 is disposed on the restraining sleeve 63 between the sealing portion 69 and the arcuate movable groove 65.

Furthermore, the upper side of the inner cavity of the connecting rod 3 is provided with a plurality of upper stay cord positioning columns 31 which are arranged at equal intervals, the linkage stay cord 52 sequentially penetrates through the upper stay cord positioning columns 31 to be connected with the fixing pins 21, the lower side of the inner cavity of the connecting rod 3 is provided with a plurality of lower stay cord positioning columns 32 which are arranged at equal intervals, and the positioning stay cord 51 sequentially penetrates through the lower stay cord positioning columns 32 to be connected with the limiting sleeve 63. Here, the upper cord positioning post 31 and the lower cord positioning post 32 are both provided with a cord threading hole.

Preferably, the movable clamp assembly 4 includes an upper clamp 41 and a lower clamp 42, one end of the upper clamp 41 is connected to the linkage sleeve 53, the lower clamp 42 is connected to the positioning sleeve 56, and the corresponding sides of the upper clamp 41 and the lower clamp 42 are provided with clamping teeth 43 which are arranged in a staggered manner.

More specifically, the handle resetting structure 7 includes an arc-shaped positioning sleeve 71 disposed on the positioning handle 1, an arc-shaped positioning post 72 inserted into the arc-shaped positioning sleeve 71 is disposed on the movable handle 2, a return spring 73 is disposed at the bottom of the arc-shaped positioning sleeve 71, and the return spring 73 abuts against the end of the arc-shaped positioning post 72. The return spring 73 is used for separating one end of the movable handle 2 from one end of the positioning handle 2, so that the other ends are close to each other, and the rotary return of the pressing sleeve 61 is realized.

The principle of the embodiment is as follows: by pressing one end of the movable handle 2, one end of the movable handle 2 is close to the positioning handle 1 by overcoming the acting force of the handle resetting structure 7, the other end of the movable handle 2 moves towards the direction far away from the positioning handle 1 and drives the linkage sleeve 53 to rotate anticlockwise through the linkage pull rope 52, the linkage sleeve 53 drives the positioning sleeve 56 to rotate clockwise through the meshing internal teeth 55, the positioning sleeve 56 is connected with the limiting sleeve 63 through the positioning pull rope 51, the limiting sleeve 63 rotates along the positioning pin 11, when the positioning groove 66 of the limiting sleeve 63 rotates to be in a position corresponding to the protruding part 64 of the pressing sleeve 61, the protruding part 64 is inserted into the positioning groove 66 due to the acting force of the resetting tension spring 67, the limiting sleeve 63 stops moving, the positioning sleeve 56 and the linkage sleeve 53 stop synchronously, and the upper clamp 41 and the lower clamp 42 are clamped mutually; when the upper clamp 41 and the lower clamp 42 need to be loosened, the pressing part 62 on the pressing sleeve 61 is pressed, the protruding part 64 is separated from the positioning groove 66 and enters the arc-shaped movable groove 65, the movable handle 2 is separated from one end of the positioning handle 1 due to the acting force of the handle resetting structure 7, the other ends of the movable handle 2 and the positioning handle 1 are close to each other, the linkage pull rope 52 is reset, the linkage sleeve 53 and the limiting sleeve 63 are synchronously reset, and the upper clamp 41 and the lower clamp 42 are loosened.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although the terms of the positioning handle 1, the positioning pin 11, the movable handle 2, the connecting rod 3, the upper rope positioning post 31, the lower rope positioning post 32, the movable clamp assembly 4, the upper clamp 41, the lower clamp 42, the clamping tooth 43, the rotational linkage 5, the positioning rope 51, the linkage rope 52, the linkage sleeve 53, the linkage sleeve stopper 54, the internal teeth 55, the positioning sleeve 56, the external teeth 57, the connecting portion 58, the positioning sleeve stopper 59, the rotational positioning assembly 6, the pressing sleeve 61, the pressing portion 62, the stopper sleeve 63, the protruding portion 64, the arc-shaped movable groove 65, the positioning groove 66, the return tension spring 67, the connecting rod 68, the sealing portion 69, the handle return structure 7, the arc-shaped positioning sleeve 71, the arc-shaped positioning post 72, the return spring 73, and the like are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A surgical minimally invasive grasping forceps with a linkage mechanism comprises a positioning handle (1), one end of the positioning handle (1) is rotationally connected with a movable handle (2) through a positioning pin (11), the end part of the positioning handle (1) is provided with a connecting rod (3) which extends in the direction vertical to the positioning handle (1), one end of the connecting rod (3) is provided with a movable clamp assembly (4), it is characterized in that the end part of the connecting rod (3) is connected with the movable clamp assembly (4) through a rotating linkage device (5), one end of the rotating linkage device (5) is connected with a rotating positioning component (6) arranged on the circumferential outer side of the positioning pin (11) through a positioning pull rope (51), the other end is connected with a fixed pin (21) arranged at the end part of the movable handle (2) through a linkage pull rope (52), and a handle resetting structure (7) is arranged between the movable handle (2) and the positioning handle (1).

2. The minimally invasive surgical grasping forceps with the linkage mechanism according to claim 1, wherein the rotating linkage device (5) comprises a linkage sleeve (53), linkage sleeve limiting portions (54) are arranged at two ends of the linkage sleeve (53), meshing internal teeth (55) are arranged on the circumferential inner wall of the linkage sleeve (53), a positioning sleeve (56) is inserted into the circumferential inner side of the linkage sleeve (53), meshing external teeth (57) which are staggered one by one with the meshing internal teeth (55) are arranged on the circumferential outer wall of one end of the positioning sleeve (56), and the meshing internal teeth (55) on the linkage sleeve (53) are meshed with the meshing external teeth (57) on the positioning sleeve (56).

3. The minimally invasive surgical grasping forceps with the linkage mechanism according to claim 2, wherein one end of the positioning sleeve (56) is exposed out of the linkage sleeve (53) to form a connecting portion (58), one end of the positioning pull rope (51) is sleeved on the connecting portion (58), two ends of the positioning sleeve (56) are provided with positioning sleeve limiting portions (59), and the positioning sleeve limiting portions (59) inserted into one end of the linkage sleeve (53) and the linkage sleeve limiting portions (54) are attached to each other.

4. The minimally invasive surgical grasping forceps with the linkage mechanism according to claim 3, characterized in that the linkage pulling rope (52) is sleeved at one end on the circumferential outer wall of the linkage sleeve (53).

5. The minimally invasive surgical grasping forceps with the linkage mechanism according to claim 1, wherein the rotating positioning assembly (6) comprises a pressing sleeve (61), one end of the pressing sleeve (61) is closed by a pressing portion (62), the other end of the pressing sleeve is connected with a limiting sleeve (63), the pressing sleeve (61) is inserted into the limiting sleeve (63), a protruding portion (64) is arranged on the circumferential outer wall of the pressing sleeve (61), an arc-shaped movable groove (65) is arranged on the limiting sleeve (63), a positioning groove (66) corresponding to the protruding portion (64) is arranged on one side of the arc-shaped movable groove (65) close to the pressing sleeve (61), and the protruding portion (64) is arranged in the arc-shaped movable groove (65).

6. The minimally invasive surgical grasping forceps with the linkage mechanism according to claim 5, characterized in that a return tension spring (67) is axially arranged in the pressing sleeve (61), one end of the return tension spring (67) is provided with a connecting rod (68), and one end of the connecting rod (68) is fixedly connected with the inner wall of a sealing part (69) at one end of the limiting sleeve (63).

7. The minimally invasive surgical grasper with linkage mechanism according to claim 6, wherein an end of the positioning pull rope (51) away from the movable jaw assembly (4) is disposed on the limiting sleeve (63) between the sealing portion (69) and the arc-shaped movable groove (65).

8. The minimally invasive surgical grasping forceps with the linkage mechanism according to claim 7, characterized in that a plurality of upper pulling rope positioning columns (31) are arranged on the upper side of the inner cavity of the connecting rod (3) at equal intervals, the linkage pulling ropes (52) sequentially pass through the upper pulling rope positioning columns (31) to be connected with the fixing pins (21), a plurality of lower pulling rope positioning columns (32) are arranged on the lower side of the inner cavity of the connecting rod (3) at equal intervals, and the positioning pulling ropes (51) sequentially pass through the lower pulling rope positioning columns (32) to be connected with the limiting sleeve (63).

9. The minimally invasive surgical grasper with linkage mechanism according to claim 2, wherein the movable jaw assembly (4) includes an upper jaw (41) and a lower jaw (42), one end of the upper jaw (41) is connected to the linkage sleeve (53), the lower jaw (42) is connected to the positioning sleeve (56), and the corresponding sides of the upper jaw (41) and the lower jaw (42) are provided with the gripping teeth (43) which are arranged in a staggered manner.

10. The minimally invasive surgical grasping forceps with the linkage mechanism according to claim 1, wherein the handle returning structure (7) includes an arc-shaped positioning sleeve (71) disposed on the positioning handle (1), the movable handle (2) is provided with an arc-shaped positioning post (72) inserted into the arc-shaped positioning sleeve (71), the bottom of the arc-shaped positioning sleeve (71) is provided with a return spring (73), and the return spring (73) is abutted against the end of the arc-shaped positioning post (72).