CN114191059A

CN114191059A - Fetching device for abdominal operation of gynecology department

Info

Publication number: CN114191059A
Application number: CN202111564354.5A
Authority: CN
Inventors: 朱科科; 邵志坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-03-18
Anticipated expiration: 2041-12-20
Also published as: CN114191059B

Abstract

The invention discloses an extractor for gynecological abdominal cavity surgery, which comprises an outer sleeve, an inner sleeve arranged in the outer sleeve, a first memory metal elastic wire connected to one end of the inner sleeve and a bag body, wherein two ends of the inner first memory metal elastic wire are fixedly connected to the outer side of a guide ring, a connecting support rod is arranged at the guide ring, an extrusion and separation mechanism for separating large resections is arranged at one end of the connecting support rod positioned at the outer side of the guide ring, and the extrusion and separation mechanism is connected with the bag body, and the extractor for gynecological abdominal cavity surgery is characterized in that a silk net is arranged in the bag body and is matched with the bag body to realize the collection effect of the resections, and the silk net can directly separate and cut the large resections into small blocks after the large resections are collected, so that the resections can be taken out conveniently without additionally using surgical instruments to cut the large resections, the operation difficulty is effectively reduced, and the use in abdominal cavity operation of gynecology is convenient.

Description

Fetching device for abdominal operation of gynecology department

Technical Field

The invention relates to the technical field of medical instruments, in particular to an extractor for a gynecological abdominal operation.

Background

The thing ware is got in endoscopic surgery is special to laparoscopic surgery operation demand and development, can once only take out operation excision thing (malignant tumor, cystic nature, pustule excision thing and tissues such as endometrium), prevent effectively that pathological change tissue and healthy tissue from contacting, avoid the pathology to remain, can not only make things convenient for doctor's operation greatly, reduce the operation degree of difficulty, save operating time, improve operation efficiency, be favorable to patient postoperative rehabilitation moreover, reduce patient postoperative infection risk, save a large amount of recessive treatment expenses for the patient.

At present, in the existing gynecological abdominal cavity operation, when the surgical excision is removed, the excision and the cystic liquid are directly taken out when the extractor, the bag body and the puncture needle are pulled out, when the larger excision material is taken out, the bag mouth of the bag body needs to be pulled out to the outer side of the incision, then the bag mouth is expanded, the large excision material is cut into small blocks in the bag body by using a surgical instrument, and then the excision material is taken out in times, when the bag mouth is tightened and pulled to the outer side of the cut, the large cut-off object in the bag body is easily pressed against the cut, so that the cut is torn due to collision, secondly, the operation instrument is needed to be used again manually to cut the massive resection objects, which not only increases the operation difficulty, meanwhile, when cutting is performed, the bag body is easily damaged, and the cut-off object is left in the cut. Therefore, the fetching device for the abdominal cavity operation of the gynecology department is provided.

Disclosure of Invention

The invention aims to provide an extractor for gynecological abdominal cavity surgery to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the bag comprises an outer sleeve, an inner sleeve arranged in the outer sleeve, a first memory metal elastic wire connected to one end of the inner sleeve and a bag body, wherein the mouth of the bag body is connected to a continuous circle of the first memory metal elastic wire in series, one end of the inner sleeve is connected with a guide ring, and two ends of the first memory metal elastic wire are fixedly connected to the outer side of the guide ring;

the utility model discloses a bag body, including the guide ring, guide ring department is equipped with connection branch, the one end that connection branch is located the guide ring outside is equipped with the extrusion partition mechanism who cuts apart the bold excision thing, and extrudes partition mechanism and bag body coupling, the other end of connection branch is equipped with coupling mechanism, interior sleeve pipe department is equipped with and is used for carrying out the actuating mechanism that stimulates coupling mechanism.

Preferably, the extrusion cutting mechanism is including setting up the second memory metal elastic wire in connecting branch one end, the cover is equipped with a plurality of support covers on the second memory metal elastic wire, and supports the cover and all slide to cup joint on second memory metal elastic wire, and is a plurality of support cover bottom is connected with the silk gauze each other, the bottom of internal portion of bag is equipped with the setting element that is used for the location of silk gauze, cuts apart the mechanism through the extrusion that is equipped with to the realization extrudes the effect of cutting to the bold excision thing.

Preferably, the wire mesh is composed of a plurality of vertical wires and a plurality of horizontal wires for connecting the plurality of vertical wires, so that the wire mesh has an effect of sufficiently cutting the large resection object.

Preferably, the setting element is including setting up a plurality of rubber strips in the internal portion bottom of bag, and the rubber strip is the Y shape, silk net bottom is equipped with the rubber circle, and the position that the rubber circle corresponds the rubber strip is equipped with the draw-in groove, through the setting element that is equipped with to carry out the effect of being connected each other with silk net and bag body.

Preferably, the connecting mechanism comprises a draw bar connected to one end of the connecting support rod positioned in the inner sleeve, a guide piece is arranged on the outer side of one end of the draw bar, a handle is connected to one end of the draw bar positioned on the outer side of the inner sleeve in a threaded manner, and the connecting mechanism is arranged so as to realize the connecting effect on the connecting support rod.

Preferably, the guide piece comprises a guide frame fixedly sleeved on the outer side of the traction rod, balls are arranged at two ends of the guide frame, two transverse grooves are respectively arranged at positions, corresponding to the two balls, of the inner sleeve, the tail ends of the transverse grooves are arranged on the inner sleeve, and a spiral groove is formed in the tail end of each transverse groove and located on the inner sleeve.

Preferably, the driving mechanism comprises a threaded cover which is sleeved at one end of the inner sleeve in a threaded manner, and the threaded cover is in threaded connection with the outer wall of the outer sleeve;

one end of the outer side of the threaded cover is rotatably connected with an internal thread sleeve, an external thread is arranged on the outer side of the traction rod, the internal thread sleeve is in threaded sleeve connection with the outer side of the traction rod, and the traction rod is driven by the driving mechanism.

Preferably, a positioning shell is fixedly sleeved on the outer side of one end, close to the handle, of the outer sleeve, a plurality of accommodating cavities are arranged in the positioning shell at equal intervals, clamping blocks are arranged in the accommodating cavities, and guide ports are arranged at positions, corresponding to the clamping blocks, of the outer sleeve;

the inner sleeve is provided with a clamping interface for connecting with the clamping block;

a plurality of buffer springs are mounted at one end, far away from the outer sleeve, in the accommodating cavity and fixedly connected with the clamping block;

the fixture block is provided with a wedge-shaped opening, the wedge-shaped opening is provided with a reset rod, the outer side of the outer sleeve is provided with a pushing piece used for connecting the plurality of reset rods, and the inner sleeve is positioned through the fixture block.

Preferably, the pushing part comprises a pushing ring which is sleeved on the outer side of the outer sleeve in a sliding manner, the plurality of reset rods are fixedly connected with the pushing ring, a plurality of extrusion springs are fixedly connected to the inner side of the pushing ring and fixedly connected to the positioning shell, and the pushing part is arranged so as to push the reset rods.

Preferably, a conical sleeve is sleeved at the guide ring and outside the connecting support rod and used for removing resection objects stained on the silk screen, one end of the conical sleeve inside the inner sleeve is connected with a limiting ring, the limiting ring is sleeved outside the connecting support rod, a plurality of limiting rods are arranged on the limiting ring at equal intervals, and the limiting ring penetrates through the limiting ring in a sliding manner;

a plurality of first limiting springs and second limiting springs are fixedly connected to the limiting ring, one ends of the first limiting springs are fixedly connected with the inside of the inner sleeve, one ends of the second limiting springs are fixedly connected with limiting plates, and the limiting plates are fixedly connected to the limiting rods;

it is a plurality of first spacing spring and the equal cover of second are established in the gag lever post outside, through the toper sleeve that is equipped with to the realization is to the effect that the excision thing that is stained with on the silk gauze was got rid of.

Compared with the prior art, the invention has the beneficial effects that:

1. when the bag is used, the silk net is arranged in the bag body and is matched with the bag body to realize the effect of collecting resection objects, and meanwhile, after the collection of large resection objects is completed, the silk net can directly separate and resect large resection objects into small blocks, so that the resection objects can be conveniently taken out, surgical instruments are not required to be additionally used for cutting the large resection objects, the surgical difficulty is effectively reduced, and the bag is convenient for abdominal cavity surgery of gynecology.

2. According to the invention, the connecting mechanism is arranged on the connecting support rod, and the driving mechanism is arranged at the inner sleeve, so that the connecting support rod can be pulled out in a matching manner, the movement of the connecting support rod is positioned, and the wire net can be pulled independently.

Drawings

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

FIG. 2 is a schematic view of a wire mesh structure according to the present invention;

FIG. 3 is an internal view of the overall structure of the present invention;

FIG. 4 is a schematic view of the internal structure of the bag of the present invention;

FIG. 5 is a schematic view of the tapered sleeve structure of the present invention.

In the figure: 1-outer sleeve; 2-inner sleeve; 21-a guide ring; 22-connecting struts; 23-a transverse slot; 24-helical groove; 25-a card interface; 3-a first memory metal elastic wire; 31-a bag body; 4-extruding and cutting mechanism; 41-second memory metal elastic wire; 42-a support sleeve; 43-wire mesh; 431-vertical lines; 432-horizontal line; 5-a connection mechanism; 51-a drawbar; 52-a guide; 521-a guide frame; 522-balls; 53-a handle; 6-a drive mechanism; 61-screw cap; 62-an internal thread sleeve; 7-a positioning member; 71-rubber strips; 72-rubber ring; 721-card slot; 8-positioning the shell; 81-an accommodation chamber; 82-a fixture block; 821-wedge shaped opening; 83-a reset lever; 84-a pusher; 841-a push ring; 842-pressing the spring; 85-buffer spring; 9-a tapered sleeve; 91-a spacing ring; 92-a limiting rod; 93-a first limit spring; 94-a second limit spring; 95-limiting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a fetching device for gynecological abdominal cavity surgery comprises an outer sleeve 1, an inner sleeve 2 arranged inside the outer sleeve 1, a first memory metal elastic wire 3 connected to one end of the inner sleeve 2 and a bag body 31, wherein the mouth of the bag body 31 is connected to a continuous circle of the first memory metal elastic wire 3 in series, one end of the inner sleeve 2 is connected with a guide ring 21, and two ends of the first memory metal elastic wire 3 are fixedly connected to the outer side of the guide ring 21;

a connecting support rod 22 is arranged at the position of the guide ring 21, an extrusion and separation mechanism 4 for separating the large excision objects is arranged at one end of the connecting support rod 22, which is positioned at the outer side of the guide ring 21, and the extrusion and separation mechanism 4 is connected with the bag body 31;

the extrusion dividing mechanism 4 comprises a second memory metal elastic wire 41 arranged at one end of the connecting support rod 22, a plurality of supporting sleeves 42 are sleeved on the second memory metal elastic wire 41, the supporting sleeves 42 are all sleeved on the second memory metal elastic wire 41 in a sliding mode, a wire net 43 is connected to the bottoms of the supporting sleeves 42, and a positioning part 7 used for positioning the wire net 43 is arranged at the bottom end inside the bag body 31.

The wire net 43 is composed of a plurality of vertical wires 431 and horizontal wires 432, and the plurality of horizontal wires 432 are used to connect the plurality of vertical wires 431.

The positioning member 7 comprises a plurality of rubber strips 71 arranged at the bottom end inside the bag body 31, the rubber strips 71 are Y-shaped, the bottom of the silk thread net 43 is provided with a rubber ring 72, and a clamping groove 721 is arranged at the position of the rubber ring 72 corresponding to the rubber strips 71;

before the bag is used, the bottoms of the silk thread nets 43 are connected with the rubber strips 71 through the plurality of clamping grooves 721 of the rubber rings 72, so that the bag body 31 is connected with the silk thread nets 43, when large cuttings are cut, the silk thread nets 43 are forced to be separated from the plurality of rubber strips 71 in the process of pulling the silk thread nets 43 through the connecting support rods 22, and therefore the silk thread nets 43 and the bag body 31 are separated.

The other end of the connecting strut 22 is provided with a connecting mechanism 5, the inner sleeve 2 is provided with a driving mechanism 6 for pulling the connecting mechanism 5, the connecting mechanism 5 comprises a draw bar 51 connected to one end of the connecting strut 22 positioned in the inner sleeve 2, a guide 52 is arranged on the outer side of one end of the draw bar 51, and a handle 53 is connected to one end of the draw bar 51 positioned on the outer side of the inner sleeve 2 through threads.

The guide 52 includes a guide frame 521 fixedly secured to the outer side of the drawbar 51, balls 522 are disposed at two ends of the guide frame 521, two transverse grooves 23 are respectively disposed at positions of the inner sleeve 2 corresponding to the two balls 522, and a spiral groove 24 is disposed at the tail end of each of the two transverse grooves 23 and on the inner sleeve 2.

The driving mechanism 6 comprises a threaded cover 61 which is sleeved at one end of the inner sleeve 2 in a threaded manner, the threaded cover 61 is in threaded connection with the outer wall of the outer sleeve 1, when one end of the inner sleeve 2 is moved to the outer side of the outer sleeve 1, the threaded cover 61 is continuously rotated, the threaded cover 61 and the inner sleeve 2 can be detached, and then the traction rod 51 can be separated from the inner sleeve 2;

an internal thread sleeve 62 is rotatably connected to one end of the outer side of the threaded cover 61, a rotating ring for manual rotation is mounted on the outer side of the threaded sleeve, so that the internal thread sleeve 62 can be conveniently and manually rotated, external threads are arranged on the outer side of the traction rod 51, and the internal thread sleeve 62 is sleeved on the outer side of the traction rod 51 in a threaded manner.

The outer side of one end, close to the handle 53, of the outer sleeve 1 is fixedly sleeved with a positioning shell 8, two pull rings are arranged on the outer side of the positioning shell 8, so that the outer sleeve 1 can be pulled manually, a plurality of accommodating cavities 81 are formed in the positioning shell 8 at equal intervals, clamping blocks 82 are arranged in the accommodating cavities 81, and guide ports are formed in the positions, corresponding to the clamping blocks 82, of the outer sleeve 1;

the inner sleeve 2 is provided with a clamping interface 25 for connecting with the clamping block 82;

a plurality of buffer springs 85 are arranged at one end of the accommodating cavity 81 far away from the outer sleeve 1, and the buffer springs 85 are fixedly connected with the fixture blocks 82;

the fixture block 82 is provided with a wedge-shaped opening 821, the wedge-shaped opening 821 is provided with a reset rod 83, a pushing member 84 used for connecting the plurality of reset rods 83 is installed on the outer side of the outer sleeve 1, the pushing member 84 comprises a pushing ring 841 which is slidably sleeved on the outer side of the outer sleeve 1, the plurality of reset rods 83 are fixedly connected with the pushing ring 841, the reset rod 83 is in a wedge shape, the wedge surface of the reset rod 83 corresponds to the wedge surface of the wedge-shaped opening 821, the inner side of the pushing ring 841 is fixedly connected with a plurality of extrusion springs 842, and the extrusion springs 842 are fixedly connected on the positioning shell 8.

Move to a plurality of fixture blocks 82 department when interior sleeve pipe 2's joint interface 25 department, then a plurality of fixture blocks 82 realize relatively fixed to interior sleeve pipe 2, when needs extract interior sleeve pipe 2 to the outer tube 1 outside, then promote to push away movable ring 841, make to push away movable ring 841 and drive a plurality of release link 83 synchronous motion, and in the time of release link 83 removal, promote fixture block 82 and move along holding the chamber 81 outside, until a plurality of fixture blocks 82 all break away from joint interface 25 departments, thereby realize the dismantlement to interior sleeve pipe 2 and outer tube 1.

A conical sleeve 9 is sleeved at the guide ring 21 and outside the connecting support rod 22, the conical sleeve 9 is used for removing the resection objects stained on the wire mesh 43, one end of the conical sleeve 9 inside the inner sleeve 2 is connected with a limiting ring 91, the limiting ring 91 is sleeved outside the connecting support rod 22, a plurality of limiting rods 92 are equidistantly arranged on the limiting ring 91, and the limiting ring 91 penetrates through the limiting ring 91 in a sliding manner;

a plurality of first limiting springs 93 and second limiting springs 94 are fixedly connected to the limiting ring 91, one end of each first limiting spring 93 is fixedly connected with the inside of the inner sleeve 2, one end of each second limiting spring 94 is fixedly connected with a limiting plate 95, and each limiting plate 95 is fixedly connected to a limiting rod 92;

the limiting rod 92 outside is all established to a plurality of first limiting springs 93 and second limiting spring 94, and along with the silk screen 43 along interior inside in-process that carries out continuous movement of sleeve pipe 2, the effect that the excision thing that the taper sleeve 9 was stained with on to silk screen 43 was got rid of, simultaneously under a plurality of first limiting springs 93 and the connection effect of second limiting spring 94, makes taper sleeve 9 last reciprocating motion, realizes effectively getting rid of the excision thing.

After the large excision objects are excised and put into the bag body 31, and at the same time, after the large excision objects are positioned inside the silk screen 43, the screw cap 61 is manually rotated to separate the large excision objects from the outer sleeve 1, and the large excision objects are also positioned on the inner sleeve 2, and then the inner sleeve 2 is relatively pulled through the screw cap 61 until the plurality of clamping interfaces 25 on the inner sleeve 2 move to the plurality of clamping blocks 82, the plurality of clamping blocks 82 fix the inner sleeve 2 relative to the outer sleeve 1, at this time, the first memory metal elastic wire 3 and the second memory metal elastic wire 41 are both contracted into the outer sleeve 1, meanwhile, the bag mouth of the bag body 31 is tightened, and the silk screen 43 mouth is synchronously tightened, then, the draw bar 51 is driven by the driving force due to the limiting effect of the guide frame 521 on the draw bar 51 in the two transverse grooves 23, so that the draw bar 51 drives the connecting support rod 22 to move along the inner sleeve 2, and the silk screen 43 continuously contracts, the cuttings are tightened and gathered, when two balls 522 on the direct guide frame 521 move to the two spiral grooves 24, the internal thread sleeve 62 continuously rotates, at the moment, the guide frame 521 rotates along the spiral grooves while moving, the further effect that the silk net 43 rotates while being tightened is achieved, and meanwhile, the cutting and separating effects on the large cuttings are achieved under the limiting effect of the bag body 31.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a thing ware is got to gynaecology's abdominal cavity operation, includes outer tube (1), sets up at inside interior sleeve pipe (2) of outer tube (1), connects first memory metal stretch yarn (3) and the bag body (31) of interior sleeve pipe (2) one end, bag body (31) oral area cluster is on continuous first memory metal stretch yarn (3) of round, its characterized in that: one end of the inner sleeve (2) is connected with a guide ring (21), and two ends of the first memory metal elastic wire (3) are fixedly connected to the outer side of the guide ring (21);

guide ring (21) department is equipped with connecting rod (22), the one end that connecting rod (22) are located the guide ring (21) outside is equipped with extrusion partition mechanism (4) of cutting apart the bold excision thing, and extrudees partition mechanism (4) and bag body (31) and be connected, the other end of connecting rod (22) is equipped with coupling mechanism (5), interior sleeve pipe (2) department is equipped with and is used for carrying out actuating mechanism (6) that stimulate coupling mechanism (5).

2. The extractor for the abdominal cavity operation of the gynecology department of claim 1, wherein: mechanism (4) are cut apart in the extrusion is including setting up second memory metal stretch yarn (41) in connecting branch (22) one end, the cover is equipped with a plurality of support covers (42) on second memory metal stretch yarn (41), and supports cover (42) and all slide to cup joint on second memory metal stretch yarn (41), and is a plurality of it is connected with silk gauze (43) to support cover (42) bottom each other, the inside bottom of bag body (31) is equipped with and is used for setting element (7) to silk gauze (43) location.

3. The extractor for the abdominal cavity operation of the gynecology department of claim 2, wherein: the wire net (43) is composed of a plurality of vertical wires (431) and transverse wires (432), and the plurality of transverse wires (432) are used for connecting the plurality of vertical wires (431).

4. The extractor for the abdominal cavity operation of the gynecology department of claim 2, wherein: the locating piece (7) is including setting up a plurality of rubber strips (71) in bag body (31) inside bottom, and rubber strip (71) are the Y shape, silk net (43) bottom is equipped with rubber circle (72), and the position that rubber circle (72) corresponds rubber strip (71) is equipped with draw-in groove (721).

5. The extractor for the abdominal cavity operation of the gynecology department of claim 1, wherein: the connecting mechanism (5) comprises a connecting support rod (22) and a draw bar (51) connected to one end of the connecting support rod, wherein the end of the connecting support rod is located inside the inner sleeve (2), a guide piece (52) is arranged on the outer side of one end of the draw bar (51), and a handle (53) is connected to one end of the draw bar (51), which is located on the outer side of the inner sleeve (2), through threads.

6. The extractor for abdominal cavity operation of gynecology of claim 5, wherein: the guide piece (52) comprises a guide frame (521) fixedly sleeved on the outer side of the traction rod (51), balls (522) are arranged at two ends of the guide frame (521), two transverse grooves (23) are respectively arranged at positions, corresponding to the two balls (522), of the inner sleeve (2), and spiral grooves (24) are formed in the tail ends of the transverse grooves (23) and located on the inner sleeve (2).

7. The extractor for the abdominal cavity operation of the gynecology department of claim 2, wherein: the driving mechanism (6) comprises a threaded cover (61) which is sleeved at one end of the inner sleeve (2) in a threaded manner, and the threaded cover (61) is in threaded connection with the outer wall of the outer sleeve (1);

one end of the outer side of the threaded cover (61) is rotatably connected with an internal threaded sleeve (62), external threads are arranged on the outer side of the traction rod (51), and the internal threaded sleeve (62) is in threaded sleeve connection with the outer side of the traction rod (51).

8. The extractor for the abdominal cavity operation of the gynecology department of claim 1, wherein: the outer side of one end, close to the handle (53), of the outer sleeve (1) is fixedly sleeved with a positioning shell (8), a plurality of accommodating cavities (81) are formed in the positioning shell (8) at equal intervals, clamping blocks (82) are arranged in the accommodating cavities (81), and guide ports are formed in the positions, corresponding to the clamping blocks (82), of the outer sleeve (1);

the inner sleeve (2) is provided with a clamping interface (25) for connecting with the clamping block (82);

a plurality of buffer springs (85) are mounted at one end, far away from the outer sleeve (1), in the accommodating cavity (81), and the buffer springs (85) are fixedly connected with the clamping blocks (82);

the fixture block (82) is provided with a wedge-shaped opening (821), a reset rod (83) is arranged at the wedge-shaped opening (821), and a pushing piece (84) used for connecting the reset rods (83) is installed on the outer side of the outer sleeve (1).

9. The extractor for abdominal cavity operation of gynecology of claim 8, wherein: the pushing piece (84) comprises a pushing ring (841) which is sleeved outside the outer sleeve (1) in a sliding mode, a plurality of reset rods (83) are fixedly connected with the pushing ring (841), a plurality of extrusion springs (842) are fixedly connected to the inner side of the pushing ring (841), and the extrusion springs (842) are fixedly connected to the positioning shell (8).

10. The extractor for the abdominal cavity operation of the gynecology department of claim 1, wherein: a conical sleeve (9) is sleeved at the guide ring (21) and positioned outside the connecting support rod (22), the conical sleeve (9) is used for removing cuttings stained on the wire mesh (43), one end of the conical sleeve (9) positioned inside the inner sleeve (2) is connected with a limiting ring (91), the limiting ring (91) is sleeved outside the connecting support rod (22), a plurality of limiting rods (92) are equidistantly arranged on the limiting ring (91), and the limiting ring (91) penetrates through the limiting ring (91) in a sliding manner;

a plurality of first limiting springs (93) and second limiting springs (94) are fixedly connected to the limiting ring (91), one ends of the first limiting springs (93) are fixedly connected with the inside of the inner sleeve (2), one ends of the second limiting springs (94) are fixedly connected with limiting plates (95), and the limiting plates (95) are fixedly connected to the limiting rods (92);

the first limiting springs (93) and the second limiting springs (94) are sleeved on the outer sides of the limiting rods (92).