CN219203659U

CN219203659U - Networking connection box for blasting

Info

Publication number: CN219203659U
Application number: CN202223556967.7U
Authority: CN
Inventors: 胡声钉; 廖宏昌; 韦沿行
Original assignee: Guangxi Guofang Construction Engineering Co ltd
Current assignee: Guangxi Guofang Construction Engineering Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-16
Anticipated expiration: 2032-12-29

Abstract

The utility model provides a networking connection box for blasting, and belongs to the technical field of connection boxes. The networking connection box for blasting comprises a connection box assembly and a cover plate assembly, wherein a wiring terminal and the connection assembly are arranged in the connection box assembly; the connecting box assembly comprises a box body, a first rotating member is fixedly connected to the upper end of the front side surface of the box body, a first mounting hole is formed in the rear side surface of the box body, waterproof connectors are mounted on the front side, the rear side, the left side and the right side of the outer portion of the box body, and fixing sheets are fixedly connected to the lower surface of the inner portion of the box body. The utility model can conveniently connect the wire connector with the wiring terminal, avoids the situation that the wire connector is difficult to be smoothly inserted into the wiring terminal in the connecting box, is easy to cause the virtual connection of the wire connector and the wiring terminal, and simultaneously has the problem of influencing the wiring efficiency, is convenient and efficient to operate, has better tightness, and prevents foreign matters from entering the inside.

Description

Networking connection box for blasting

Technical Field

The utility model relates to the technical field of connection boxes, in particular to a networking connection box for blasting.

Background

The connection box is arranged at the wire joint part, connects networking wires, achieves the aim of transitional connection, achieves the functions of networking circuit connection and protection of the networking wires, and has different characteristics according to use requirements in practical application, such as waterproof property, sealing property, splash resistance, flame retardance, dust prevention, ultraviolet prevention and the like.

At present, networking connection box for blasting that uses on the market is through inserting many networking electric wires in the connection box, and the joint position is connected through binding post, and binding post is installed in the connection box in advance through a plurality of screws, because the connection box is small, in being difficult to insert the binding post smoothly with wire connection in the connection box, easily causes the circumstances such as wire connection and binding post virtual joint, also influences wiring efficiency simultaneously.

Disclosure of Invention

In order to make up for the defects, the utility model provides a networking connection box for blasting, and aims to solve the problems that the connection box is difficult to smoothly insert a wire connector into a wiring terminal, the wire connector and the wiring terminal are easy to be in virtual connection, and the wiring efficiency is influenced.

The utility model is realized in the following way:

the utility model provides a networking connection box for blasting, which comprises a connection box assembly and a cover plate assembly, wherein a wiring terminal and a connection assembly are arranged in the connection box assembly;

the connecting box assembly comprises a box body, wherein the upper end of the front side surface of the box body is fixedly connected with a first rotating member, the rear side surface of the box body is provided with a first mounting hole, the front, back, left and right sides of the outer part of the box body are provided with waterproof joints, the lower surface of the inner part of the box body is fixedly connected with a fixing sheet, the front, back, left and right sides of the box body are provided with through holes matched with the waterproof joints, the through holes are in threaded connection with the box body through the waterproof joints, the front and back ends of the lower parts of the left and right sides of the box body are fixedly connected with side lugs, and the upper surface of the box body is glued with sealing sheets;

the cover plate assembly comprises cover plate monomers, a second rotating member is fixedly connected to the front side of each cover plate monomer, the second rotating member is connected with the first rotating member in a rotating mode, reinforcing ribs are arranged on the lower surface of each cover plate monomer, second mounting holes are formed in the rear side of each cover plate monomer, and a pulling piece is arranged between every two second mounting holes.

In one embodiment of the present utility model, the reinforcing rib and the cover plate are integrally injection molded, and the second mounting hole is matched with the first mounting hole.

In one embodiment of the utility model, the connecting assembly comprises a first mounting seat, a plurality of fourth mounting holes are longitudinally and equidistantly formed in the upper surface of the first mounting seat, the wiring terminals are arranged on the upper surface of the first mounting seat, fourth mounting holes matched with the fourth mounting holes are formed in the wiring terminals, and the wiring terminals are connected with the first mounting seat through the third mounting holes and the fourth mounting holes.

In one embodiment of the utility model, fixing pieces are arranged at four vertex angles of the first mounting seat, and bevel angles are arranged at upper parts of side surfaces of the fixing pieces, which are contacted with the first mounting seat.

In one embodiment of the utility model, clamping blocks are arranged at the front end and the rear end of the first mounting seat and in the left side and the right side of the first mounting seat, a first spring is fixedly connected to the side surface, close to the fourth mounting hole, of each clamping block, a second mounting seat is arranged at the left side and the right side of each first mounting seat, two second mounting seats are fixedly connected to the lower surface in the box body, one end, far away from the fourth mounting hole, of each clamping block is inserted into the second mounting seat, abutting blocks are arranged in the front end and the rear end of each second mounting seat, two abutting blocks are fixedly connected with a second spring on the side surface, far away from the first mounting seat, of each abutting block, a first connecting rod is fixedly connected between the two abutting blocks, and a handle is fixedly connected to the middle part of the upper surface of the first connecting rod.

In an embodiment of the utility model, the front side and the rear side in each first installation seat are respectively provided with a first chute matched with the clamping blocks, the clamping blocks are slidably connected in the first chutes, one end of each first spring, which is far away from the clamping blocks, is fixedly connected with the bottom surface of each first chute, a first sliding cavity is formed between the front side and the rear side of each first chute, a second connecting rod is slidably connected in the first sliding cavity, and the front end and the rear end of each second connecting rod are respectively fixedly connected with the clamping blocks on the same side in the left-right direction.

In an embodiment of the utility model, the front end and the rear end of the side surface, close to the first installation seat, of the second installation seat are provided with second sliding grooves matched with the clamping blocks, one end, far away from the fourth installation hole, of the clamping block is inserted into the second sliding grooves, the lower side of the inner end, inserted into the second sliding grooves, of the clamping block is provided with a wedge-shaped surface, the side surface, far away from the clamping block, of each second spring is fixedly connected with the bottom surface of the second sliding groove, a second sliding cavity is formed between the two second sliding grooves, the first connecting rod is slidably connected in the second sliding cavity, the upper surface of the second installation seat is provided with a waist hole, and the lower end of the handle penetrates through the waist hole to be fixedly connected with the first connecting rod.

The beneficial effects of the utility model are as follows: the networking connection box for blasting, which is obtained by the design, moves along the handle of the waist Kong Bodong towards the direction close to the first installation seat when in use, drives the first connecting rod and the abutting block to synchronously move towards the direction close to the first installation seat, the first connecting rod slides in the second sliding cavity, the abutting block slides in the second sliding groove, the second spring is in a stretching state, the abutting block abuts against the clamping block to move towards the first sliding groove until the clamping block completely enters the first sliding groove, at the moment, the clamping block and the second installation seat are in a releasing state, the wiring terminal and the first installation seat can be taken out from the box body, the electric wire penetrates into the box body from the waterproof joint and the through hole, the electric wire joint is connected with the wiring terminal, the electric wire is clamped by screwing the waterproof joint after the connection is finished, prevent that the electric wire from pulling out and leading to the condition that connects to take off, seal electric wire and through-hole opening edge with the sealant, prevent this wiring box into water and advance the phenomenon of dirt, then along stationary blade edge with first mount pad card in four stationary blades, when wedge face and second mount pad contact, the fixture block receives the extrusion to first spout internal motion, first spring is in compressed state, until first spout aligns with the second spout, the fixture block moves in the second spout under the effect of first spring, realize being connected between first mount pad and the second mount pad, through screwing the screw in second mounting hole and first mounting hole, realize the fixed connection between box body and the apron monomer, pass through the side ear granule with this junction box fixed mounting on the plane thing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a closed state of a networking connection box for blasting according to an embodiment of the present utility model;

fig. 2 is a schematic perspective view of an opened state of a networking connection box for blasting according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a networking connection box connection assembly (400) for blasting according to an embodiment of the present utility model;

fig. 4 is a schematic perspective view of a clamping block of a networking connection box, a first spring and a second connecting rod for blasting according to an embodiment of the present utility model;

fig. 5 is a schematic perspective view of a networking connection box abutment block, a second spring, a first connecting rod and a handle for blasting according to an embodiment of the present utility model;

fig. 6 is a schematic cross-sectional structure diagram of a first mounting seat of a networking connection box for blasting according to an embodiment of the present utility model;

fig. 7 is a schematic perspective view of a second installation seat of a networking connection box for blasting according to an embodiment of the present utility model.

In the figure: 100. a junction box assembly; 101. a case body; 102. a first rotating member; 103. a first mounting hole; 104. a waterproof joint; 105. a fixing piece; 106. a through hole; 107. a lateral ear; 108. a sealing sheet; 200. a cover plate assembly; 201. a cover plate monomer; 202. a second rotating member; 203. reinforcing ribs; 204. a second mounting hole; 205. a pulling piece; 300. a connection terminal; 301. a third mounting hole; 400. a connection assembly; 401. a first mount; 402. a fourth mounting hole; 403. a clamping block; 404. a first spring; 405. a second mounting base; 406. abutting blocks; 407. a second spring; 408. a first link; 409. a handle; 410. a first chute; 411. a wedge surface; 412. a second link; 413. a first sliding cavity; 414. a second chute; 415. a second sliding cavity; 416. waist holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

Examples

Referring to fig. 1-7, the present utility model provides a technical solution: a networking connection box for blasting includes a connection box assembly 100 and a cover plate assembly 200.

Referring to fig. 1 to 7, a networking connection box for blasting includes a connection box assembly 100 and a cover plate assembly 200, wherein a connection terminal 300 and a connection assembly 400 are disposed in the connection box assembly 100;

the connection box assembly 100 comprises a box body 101, a first rotating member 102 is fixedly connected to the upper end of the front side surface of the box body 101, a first mounting hole 103 is formed in the rear side surface of the box body 101, waterproof joints 104 are mounted on the front, back, left and right sides of the outer portion of the box body 101, a fixing sheet 105 is fixedly connected to the lower surface of the inner portion of the box body 101, through holes 106 matched with the waterproof joints 104 are formed in the front, back, left and right sides of the box body 101, the through holes 106 are in threaded connection with the box body 101 through the waterproof joints 104, side lugs 107 are fixedly connected to the front and back ends of the lower portions of the left and right sides of the box body 101, sealing sheets 108 are glued on the upper surface of the box body 101, and when networking wires are connected, the electric wire penetrates into the box body 101 from the waterproof connector 104 and the through hole 106, the electric wire connector is further connected with the wiring terminal 300, the electric wire is clamped by screwing the waterproof connector 104 after connection is finished, the situation that the connector is disconnected due to wire pulling-out is prevented, the edge of an opening of the electric wire and the through hole 106 is sealed by sealant, the phenomenon that the connecting box is in dust inlet is prevented, the connecting box is fixedly arranged on a plane object through side lugs 107, and when the connecting box is closed through the sealing piece 108, the box body 101 and the cover plate monomer 201 are in a sealing state, so that the whole connecting box is in a sealing state, and the waterproof and dustproof effects are achieved;

the cover plate assembly 200 comprises a cover plate single body 201, a second rotating member 202 is fixedly connected to the front side of the cover plate single body 201, the second rotating member 202 is rotationally connected with the first rotating member 102, a reinforcing rib 203 is arranged on the lower surface of the cover plate single body 201, a second mounting hole 204 is formed in the rear side of the cover plate single body 201, a poking piece 205 is arranged between every two second mounting holes 204, the reinforcing rib 203 and the cover plate single body 201 are integrally formed in an injection mode, the second mounting hole 204 and the first mounting hole 103 are matched with each other, the reinforcing rib 203 is arranged to strengthen the strength of the cover plate single body 201, the situation that the connecting box is damaged by extrusion and the like on a blasting site is prevented, the fixed connection between the box body 101 and the cover plate single body 201 is achieved through screwing screws in the second mounting hole 204 and the first mounting hole 103, when the connecting box needs to be opened, the poking piece 205 is dismounted through rotation between the first rotating member 102 and the second rotating member 202, and the purpose of overturning and opening the cover plate single body 201 is achieved.

The connecting assembly 400 comprises a first mounting seat 401, a plurality of fourth mounting holes 402 are longitudinally formed in the upper surface of the first mounting seat 401 at equal intervals, the wiring terminal 300 is arranged on the upper surface of the first mounting seat 401, the wiring terminal 300 is provided with the fourth mounting holes 402 matched with the fourth mounting holes 402, the wiring terminal 300 is connected with the first mounting seat 401 through the third mounting holes 301 and the fourth mounting holes 402 by fastening pieces, the wiring terminal 300 is pre-mounted on the upper surface of the first mounting seat 401 through the third mounting holes 301 and the fourth mounting holes 402 by using screws, fixing pieces 105 are arranged at four top corners of the first mounting seat 401, oblique angles are formed in the upper parts of side surfaces, which are in contact with the first mounting seat 401, of the fixing pieces 105, limiting the position of the first mounting seat 401 on a horizontal plane is achieved through the fixing pieces 105, dislocation between the first sliding grooves 410 and the second sliding grooves 414 is prevented, and the fixing pieces 105 are arranged at oblique angles so that the first mounting seat 401 is easier to be placed in the four fixing pieces 105, and the mounting convenience is improved.

Clamping blocks 403 are arranged in the front end and the rear end as well as the left side and the right side of the first mounting seat 401, a first spring 404 is fixedly connected to the side surface of each clamping block 403, which is close to the fourth mounting hole 402, a second mounting seat 405 is arranged in the left side and the right side of the first mounting seat 401, the two second mounting seats 405 are fixedly connected to the lower surface of the inside of the box body 101, one end, which is far away from the fourth mounting hole 402, of each clamping block 403 is inserted into the second mounting seat 405, a supporting block 406 is arranged in the front end and the rear end of each second mounting seat 405, a second spring 407 is fixedly connected to the side surface, which is far away from the first mounting seat 401, of each supporting block 406, a first connecting rod 408 is fixedly connected to the middle part of the upper surface of the first connecting rod 408, a second sliding groove 414 which is mutually matched with the clamping blocks 403 is formed in the front end and the rear end, which is close to the side surface of the first mounting seat 405, the end of the clamping block 403 far away from the fourth mounting hole 402 is inserted into the second sliding groove 414, the wedge-shaped surface 411 is arranged at the lower side of the inner end part of the clamping block 403 inserted into the second sliding groove 414, the side surface of each second spring 407 far away from the clamping block 403 is fixedly connected with the bottom surface of the second sliding groove 414, the second sliding cavities 415 are arranged between the two second sliding grooves 414, the first connecting rod 408 is slidingly connected in the second sliding cavities 415, the waist hole 416 is arranged on the upper surface of the second mounting seat 405, the lower end of the handle 409 penetrates through the waist hole 416 to be fixedly connected with the first connecting rod 408, under the action of the first spring 404, the end part of the clamping block 403 is stably clamped in the second sliding groove 414, the stable connection between the second mounting seat 405 and the first mounting seat 401 is realized, the wiring terminal 300 is further fixed inside the box body 101, the stable connection state of the wiring terminal 300 is realized, and the working stability of the connection box is improved when the wiring terminal 300 is required, the handle 409 is stirred along the waist hole 416 to move towards the direction approaching the first mounting seat 401, the first connecting rod 408 and the abutting block 406 are driven to synchronously move towards the direction approaching the first mounting seat 401, the first connecting rod 408 slides in the second sliding cavity 415, the abutting block 406 slides in the second sliding groove 414, the second spring 407 is in a stretching state, the abutting block 406 abuts against the clamping block 403 to move towards the first sliding groove 410 until the clamping block 403 completely enters the first sliding groove 410, at the moment, the clamping block 403 and the second mounting seat 405 are in a disengaging state, the wiring terminal 300 and the first mounting seat 401 can be taken out from the box body 101, the wiring terminal 300 is further connected with the wiring terminal 300 smoothly, then the first mounting seat 401 is clamped in the four fixing sheets 105 along the edges of the fixing sheets 105, when the wedge-shaped surface 411 is contacted with the second mounting seat 405, the clamping block 403 is pressed towards the first sliding groove 410 to move inwards, the first spring 404 is in a compressing state, until the first sliding groove 410 is aligned with the second sliding groove 414, the clamping blocks 403 move inwards towards the second sliding groove 414 under the action of the first springs 404, so that the connection between the first installation seat 401 and the second installation seat 405 is realized, the condition that a plurality of screws are required to be detached one by one for installation is avoided, the operation is convenient and efficient, the front side and the rear side of each first installation seat 401 are provided with the first sliding groove 410 which is mutually matched with the clamping blocks 403, the clamping blocks 403 are in sliding connection in the first sliding groove 410, one end of each first spring 404 far away from the clamping blocks 403 is fixedly connected with the bottom surface of the first sliding groove 410, a first sliding cavity 413 is arranged between the front side and the rear side of each first sliding groove 410, a second connecting rod 412 is connected in a sliding way between the front side and the rear side of each second connecting rod 412 and the clamping blocks 403 on the same side in the left-right direction respectively, the front side and the rear side of each second connecting rod 403 are fixedly connected through the second connecting rod 412, the consistency of the movement of the front clamping block 403 and the rear clamping block 403 in the horizontal direction is realized, and the fault tolerance of the movement of the two clamping blocks 403 is improved.

Specifically, the networking connection box for blasting has the structural principle that: when in use, the handle 409 is stirred along the waist hole 416 to move towards the direction approaching the first mounting seat 401, the first connecting rod 408 and the abutting block 406 are driven to synchronously move towards the direction approaching the first mounting seat 401, the first connecting rod 408 slides in the second sliding cavity 415, the abutting block 406 slides in the second sliding groove 414, the second spring 407 is in a stretching state, so that the abutting block 406 abuts against the clamping block 403 to move into the first sliding groove 410 until the clamping block 403 completely enters the first sliding groove 410, at the moment, the clamping block 403 and the second mounting seat 405 are in a releasing state, the wiring terminal 300 and the first mounting seat 401 can be taken out from the box body 101, wires are penetrated into the box body 101 from the waterproof connector 104 and the through holes 106, the wire connector is connected with the wiring terminal 300, the wires are clamped by screwing the waterproof connector 104 after the connection is finished, and the situation that the connector is disconnected due to the wire pulling is prevented, the wire and the opening edge of the through hole 106 are sealed by sealant, the phenomenon that water and dust enter the connecting box is prevented, then the first mounting seat 401 is clamped in the four fixing plates 105 along the edge of the fixing plates 105, when the wedge-shaped surface 411 is contacted with the second mounting seat 405, the clamping block 403 is pressed to move in the first sliding groove 410, the first spring 404 is in a compressed state, until the first sliding groove 410 is aligned with the second sliding groove 414, the clamping block 403 moves in the second sliding groove 414 under the action of the first spring 404, the connection between the first mounting seat 401 and the second mounting seat 405 is realized, the condition that a plurality of screws are required to be detached one by one for mounting is avoided, the operation is convenient and efficient, the fixed connection between the box body 101 and the cover plate monomer 201 is realized by screwing the screws in the second mounting holes 204 and the first mounting holes 103, and the connecting box is fixedly mounted on a plane object through the side ears 107.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The networking connection box for blasting is characterized by comprising a connection box assembly (100) and a cover plate assembly (200), wherein a wiring terminal (300) and a connection assembly (400) are arranged inside the connection box assembly (100);

the connecting box assembly (100) comprises a box body (101), wherein the upper end of the front side surface of the box body (101) is fixedly connected with a first rotating member (102), the rear side surface of the box body (101) is provided with a first mounting hole (103), waterproof connectors (104) are mounted on the front, back, left and right sides of the outer part of the box body (101), fixing sheets (105) are fixedly connected with the lower surface of the inner part of the box body (101), through holes (106) matched with the waterproof connectors (104) are formed in the front, back, left and right sides of the box body (101), the through holes (106) are in threaded connection with the box body (101) through the waterproof connectors (104), the front, back and front ends of the lower parts of the left, right sides of the box body (101) are fixedly connected with side ears (107), and sealing sheets (108) are glued on the upper surface of the box body (101).

The cover plate assembly (200) comprises a cover plate single body (201), a second rotating member (202) is fixedly connected to the front side of the cover plate single body (201), the second rotating member (202) is rotationally connected with the first rotating member (102), a reinforcing rib (203) is arranged on the lower surface of the cover plate single body (201), a second mounting hole (204) is formed in the rear side of the cover plate single body (201), and a pulling piece (205) is arranged between every two second mounting holes (204).

2. A networking connection box for blasting according to claim 1, wherein the reinforcing rib (203) is injection molded integrally with the cover plate unit (201), and the second mounting hole (204) is fitted with the first mounting hole (103).

3. The networking connection box for blasting according to claim 1, wherein the connection assembly (400) comprises a first mounting seat (401), a plurality of fourth mounting holes (402) are longitudinally and equidistantly formed in the upper surface of the first mounting seat (401), the wiring terminal (300) is arranged on the upper surface of the first mounting seat (401), a fourth mounting hole (402) matched with the fourth mounting hole (402) is formed in the wiring terminal (300), and the wiring terminal (300) is connected with the first mounting seat (401) through a third mounting hole (301) and the fourth mounting hole (402) through a fastener.

4. A networking connection box for blasting according to claim 3, wherein the four top corners of the first mounting base (401) are provided with fixing pieces (105), and the upper parts of the side surfaces of the fixing pieces (105) contacted with the first mounting base (401) are provided with bevel angles.

5. A networking connection box for blasting according to claim 3, wherein, the front and rear ends and the left and right sides of the first mounting seat (401) are respectively provided with a clamping block (403), each clamping block (403) is close to a first spring (404) fixedly connected with a side face of the fourth mounting hole (402), the left and right sides of the first mounting seat (401) are respectively provided with a second mounting seat (405), the two second mounting seats (405) are respectively fixedly connected with the inner lower surface of the box body (101), one end, far away from the fourth mounting hole (402), of each clamping block (403) is inserted in the second mounting seat (405), the front and rear ends of each second mounting seat (405) are respectively internally provided with a supporting block (406), the side faces, far away from the first mounting seat (401), of the two supporting blocks (406) are respectively fixedly connected with a second spring (407), a first connecting rod (408) is fixedly connected between the two supporting blocks (406), and the upper surface (409) of the first connecting rod (409) is fixedly connected with.

6. The networking connection box for blasting according to claim 5, wherein a first sliding groove (410) which is matched with the clamping blocks (403) is formed in the front side and the rear side in each first installation seat (401), the clamping blocks (403) are slidably connected in the first sliding groove (410), one end, away from the clamping blocks (403), of each first spring (404) is fixedly connected with the bottom surface of the first sliding groove (410), a first sliding cavity (413) is formed between the front side and the rear side of the first sliding groove (410), a second connecting rod (412) is connected in the first sliding cavity (413) in a sliding mode, and the front end and the rear end of each second connecting rod (412) are fixedly connected with the clamping blocks (403) on the same side in the left-right direction respectively.

7. The networking connection box for blasting according to claim 5, wherein the second installation seat (405) is close to the front end and the rear end of the side face of the first installation seat (401) and is provided with a second sliding groove (414) matched with the clamping block (403), one end, away from the fourth installation hole (402), of the clamping block (403) is inserted into the second sliding groove (414), the lower side of the inner end of the clamping block (403) inserted into the second sliding groove (414) is provided with a wedge-shaped surface (411), the side face, away from the clamping block (403), of each second spring (407) is fixedly connected with the bottom face of the second sliding groove (414), a second sliding cavity (415) is formed between the two second sliding grooves (414), the first connecting rod (415) is slidably connected in the second sliding cavity (415), the upper surface of the second installation seat (405) is provided with a waist hole (416), and the lower end of the handle (409) penetrates through the waist hole (416) to be fixedly connected with the first connecting rod (408).