CN216991660U

CN216991660U - Two-in-one screw driving jig

Info

Publication number: CN216991660U
Application number: CN202220769246.5U
Authority: CN
Inventors: 何宁宁
Original assignee: CK TELECOM TECHNOLOGY EQUIPMENT (HEYUAN) CO LTD
Current assignee: CK TELECOM TECHNOLOGY EQUIPMENT (HEYUAN) CO LTD
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-07-19
Anticipated expiration: 2032-04-06

Abstract

The utility model relates to the technical field of jigs, in particular to a two-in-one screw driving jig. In the utility model, the screwing cover plate is arranged between the two first connecting blocks, the product is placed in the positioning groove on the tray to cover the screwing cover plate, the screw can be screwed conveniently by using the circular hole, when the screw is screwed and fixed, the screwing cover plate is opened and the pressing cover plate is covered, so that the silica gel pressure head on the pressing cover plate is pressed down into the connector of the product, the product is pressed, when the product is pressed, the pressing cover plate is opened and the product is taken out, so that the next screwing and pressing of the product can be conveniently carried out, the product to be processed is protected by using the screwing cover plate and the pressing cover plate, the product is prevented from being collided by an electric screwdriver, the product quality is ensured, and the screwing cover plate and the pressing cover plate are both arranged on the tray, and the operation of an operator on the same station of the screwing and pressing connectors is satisfied, the waste of personnel is reduced.

Description

Two-in-one screw driving jig

Technical Field

The utility model relates to the technical field of jigs, in particular to a two-in-one screw driving jig.

Background

In the product manufacturing process, have a plurality of processes to need fix the product on frock clamp, beat the connector etc. of screw, pressfitting installation, at this moment need carry out the accuracy to the product body and fix, beat the screw and need remove the screw position, other places need do the protection, avoid being beaten badly by the electric screwdriver or unexpected to fall to have the screw in the product, so the use is beaten the screw apron and is protected. The connector is difficult to assemble, the problem that the connector cannot be assembled easily occurs, the problem that the product has functionality is avoided, the connector is pressed by the fixture, and the connector is pressed in place.

The existing screw driving jig is only provided with one positioning fixture without increasing the protection of a cover plate, the position of a written screw and PCBA components is closer in the screw driving process, the operation deviation of a worker and the electric screwdriver shake to easily knock the PCBA components or draw the appearance of a shell material. The pressfitting connector has automatic frock pressfitting at present, and this also needs accurate positioning, and automatic pressfitting frock is heavy, inconvenient operation, and only a connector pressfitting alone in the second stage uses the frock also to account for the manpower, and the frock pressfitting alone does not accomplish MES and crosses the control of station, leans on staff's conscious pressfitting, and the quality lacks guarantee and traceability. The separate fabrication of the fixture also increases the cost of fabricating the fixture.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: in order to solve the problems that in the production and manufacturing process of products, the production efficiency of the products is low, the products are not protected and are easy to damage, a plurality of workers are involved, and human resources are wasted, a two-in-one screw driving jig is provided.

The purpose of the utility model can be realized by the following technical scheme:

a two-in-one screw driving jig comprises a tray, wherein a positioning groove is formed in the middle position of the top of the tray, one end of the tray is provided with a first connecting block, a first rotating hole is formed in the top of the first connecting block, a screw driving cover plate is arranged between the first connecting block and the second connecting block, one end of the screw driving cover plate is fixedly connected with a first rotating rod, two ends of the first rotating rod are respectively and rotatably connected with a rotating hole in the corresponding position, a plurality of round holes are formed in the screw driving cover plate, one end of one side of the tray is provided with a second connecting block, a second rotating hole is formed in the top of the second connecting block, a press-fit cover plate is arranged between the second connecting blocks, one end of the press-fit cover plate is fixedly connected with a second rotating rod, two ends of the second rotating rod are respectively and rotatably connected with a second rotating hole in the corresponding position, and the other end of one side of the press-fit cover plate is fixedly connected with a silica gel pressing head, when in use, the product is put into the positioning groove on the tray and covered by the screw cover plate, the round hole is used for facilitating the screwing of the product, when the screwing and fixing of the screw are completed, the screw cover plate is opened and covered by the pressing cover plate, so that the silica gel pressure head on the pressing cover plate is pressed down into the connector of the product, thereby pressing the product, when the pressing of the product is completed, the pressing cover plate is opened and the product is taken out, thereby facilitating the next screwing and pressing of the product, the screw cover plate and the pressing cover plate are used for protecting the product to be processed, preventing the electric screwdriver from colliding with the product, ensuring the product quality, and the screw cover plate and the pressing cover plate are both arranged on one tray, satisfying the operation of an operator at the same station of the screw and the pressing connector, reducing the personnel waste and the clamp manufacturing waste, and reducing the working steps of the operator for frequently replacing the clamp, the operation and use are convenient, and the use effect of the two-in-one screw driving jig is further improved.

Further lie in, a plurality of connection breachs have been seted up to the inside wall of constant head tank, and the inside of a plurality of connection breachs is provided with all and is provided with the silica gel piece, the intermediate position department at silica gel piece top has seted up the circular slot, and the intermediate position department of bottom surface has seted up spacing hole in the circular slot, the interior bottom surface of connection breach has seted up the bolt groove, the inside of circular slot is provided with fixing bolt, and fixing bolt one end passes spacing hole and closes soon with the bolt groove that corresponds position department and be connected, utilizes bolt groove, spacing hole, circular slot and fixing bolt to be convenient for install the silica gel piece fixedly.

The screw driving cover plate is characterized in that a first handle is fixedly connected to the middle position of the other end of one side of the screw driving cover plate, a second handle is fixedly connected to the middle position of the other end of the other side of the press fit cover plate, the screw driving cover plate can be conveniently rotated by the first handle, and the press fit cover plate can be conveniently rotated by the second handle.

Further, an infrared sensor is embedded and fixed at the middle position of one end of the bottom surface in the positioning groove, and an infrared sensing plate is embedded and fixed at the middle position of one side of the press-fit cover plate.

Further, a first rectangular groove is formed in a position, corresponding to the two first connecting blocks, of one end of the tray, a first limiting groove is formed in the middle of the inner side wall of each first rectangular groove, a first rectangular hole is formed in the bottom of each first connecting block, a first connecting shell is arranged on one side of each first connecting block, a first connecting plate is connected to the inside of each first connecting shell in a sliding mode, one end of each first connecting plate is connected with the corresponding first rectangular hole in a sliding mode, a first wedge block is fixedly connected to the other end of one side of each first connecting plate and clamped with the first limiting groove in the corresponding position, first telescopic rods are fixedly connected to the two ends of the other side of each first connecting plate, first compression springs are fixedly connected to the two ends of the other side of each first connecting plate, one telescopic rod is located inside the first compression spring in the corresponding position, the inner side wall of each rectangular hole is fixedly connected with the first telescopic rods and one end of the first compression springs in the corresponding position, the inner side wall of the connecting shell is fixedly connected with one end of a first telescopic rod and one end of a first compression spring at the corresponding positions, and one end of the first connecting plate is fixedly connected with a first pushing plate.

Further, a second rectangular groove is formed in the position, corresponding to the second two connecting blocks, of one side of the tray, a second limiting groove is formed in the middle position of the inner side wall of the second rectangular groove, a second rectangular hole is formed in the bottom of the second connecting block, a second connecting shell is arranged on one side of the second connecting block, a second connecting plate is slidably connected inside the second connecting shell, one end of the second connecting plate is slidably connected with the second rectangular hole, the other end of one side of the second connecting plate is fixedly connected with a second wedge block, the second wedge block is clamped with the second limiting groove in the corresponding position, two telescopic rods are fixedly connected with two ends of the other side of the second connecting plate, two compression springs are fixedly connected with two ends of the other side of the second connecting plate, the two telescopic rods are located inside the second compression springs in the corresponding positions, the inner side wall of the second rectangular hole is fixedly connected with the second telescopic rods and one ends of the second compression springs in the corresponding positions, the inner side wall of the second connecting shell is fixedly connected with one end of a second compression spring and a second telescopic rod at the corresponding position, and one end of the second connecting plate is fixedly connected with a second pushing plate.

The utility model has the beneficial effects that:

1. the screw cover plate is arranged between the two first connecting blocks, the screw cover plate is covered by placing the product into the positioning groove on the tray, the round hole is utilized to facilitate the screwing of the product, after the screw is screwed and fixed, the screw cover plate is opened and the press cover plate is covered, so that the silica gel pressure head on the press cover plate is pressed down into the connector of the product, thereby the product is pressed, after the product is pressed, the press cover plate is opened and the product is taken out, thereby facilitating the next screwing and pressing of the product, the screw cover plate and the press cover plate are utilized to protect the processed product, the electric screwdriver is prevented from colliding with the product, the product quality is ensured, and the screw cover plate and the press cover plate are both arranged on the tray, and the operation of an operator on the same station of the screw and the press connector is satisfied, the waste of personnel and the waste of clamp manufacturing are reduced, the working steps of frequently replacing the clamp by an operator are reduced, the operation and the use are convenient, and the using effect of the two-in-one screw driving jig is further improved;

2. the silica gel blocks are arranged inside the plurality of connecting gaps, and the silica gel blocks are utilized to facilitate the positioning of the product, and the first wedge block is separated from the first limit groove at the corresponding position by pushing the first two pushing plates, thereby facilitating the removal and replacement of the first connecting block, the first rotating rod and the first screwing cover plate, and utilizing the cooperation of the first wedge-shaped block, the first limiting groove and the first compression spring, thereby facilitating the installation and fixation of the replaced connecting block I, the rotating rod I and the screw cover plate, and separating the wedge-shaped block II from the limit groove II at the corresponding position by pushing the two pushing plates II, thereby facilitating the removal and replacement of the second connecting block, the second rotating rod and the press cover plate, and utilizing the cooperation of the second wedge-shaped block, the second limit groove and the second compression spring, thereby be convenient for install fixedly connecting block two, dwang two and pressfitting apron after changing.

Drawings

The utility model will be further described with reference to the accompanying drawings.

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

FIG. 2 is a schematic view of the position relationship between the tray and the screw cover plate;

FIG. 3 is a schematic view of the position relationship between the tray and the second connecting block;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at B;

fig. 6 is a partially enlarged view of fig. 3 at C.

In the figure: 100. a tray; 101. positioning a groove; 102. a connecting gap; 103. a bolt slot; 104. a first rectangular groove; 105. a first limiting groove; 106. a second rectangular groove; 107. a second limiting groove; 110. a silica gel block; 111. a limiting hole; 120. an infrared sensor; 130. fixing the bolt; 200. a first connecting block; 201. rotating the first hole; 202. a first rectangular hole; 210. rotating the first rod; 220. screwing a cover plate; 221. a circular hole; 230. a first handle; 240. pushing the first plate; 250. a first connecting plate; 260. a first telescopic rod; 270. a first compression spring; 280. connecting the shell I; 290. a first wedge block; 300. a second connecting block; 301. rotating the second hole; 303. a second rectangular hole; 310. rotating the second rod; 320. pressing the cover plate; 321. a silica gel pressure head; 322. an infrared induction plate; 330. a second handle; 340. a second pushing plate; 350. a second connecting plate; 360. a second telescopic rod; 370. a second compression spring; 380. a second connecting shell; 390. and a second wedge block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. 1-6, a two-in-one screw driving jig comprises a tray 100, a positioning groove 101 is disposed at a middle position of the top of the tray 100, one end of the tray 100 is provided with two first connecting blocks 200, a first rotating hole 201 is disposed at the top of the first connecting block 200, a screw driving cover plate 220 is disposed between the two first connecting blocks 200, one end of the screw driving cover plate 220 is fixedly connected with a first rotating rod 210, two ends of the first rotating rod 210 are rotatably connected with the first rotating hole 201 at the corresponding position respectively, the screw driving cover plate 220 is provided with a plurality of round holes 221, one end of one side of the tray 100 is provided with two second connecting blocks 300, a second rotating hole 301 is disposed at the top of the second connecting block 300, a press-fit cover plate 320 is disposed between the two connecting blocks 300, one end of the press-fit cover plate 320 is fixedly connected with a second rotating rod 310, and two ends of the second rotating rod 310 are rotatably connected with the second rotating holes 301 at the corresponding positions respectively, the other end of one side of the pressing cover plate 320 is fixedly connected with the silica gel pressure head 321, when in use, a product is put into the positioning groove 101 on the tray 100 and covers the screw-driving cover plate 220, and the round hole 221 is used for facilitating the screw-driving of the product, after the screw-driving and fixing are completed, the silica gel pressure head 321 on the pressing cover plate 320 is pressed down into the connector of the product by opening the screw-driving cover plate 220 and covering the pressing cover plate 320, so as to press the product, and after the product is pressed, the pressing cover plate 320 is opened and the product is taken out, so as to facilitate the next screw-driving and pressing of the product, and the product to be processed is protected by the screw-driving cover plate 220 and the pressing cover plate 320, so as to prevent the electric screwdriver from colliding with the product, thereby ensuring the product quality, and the screw-driving cover plate 220 and the pressing cover plate 320 are both installed on one tray 100, thereby satisfying the operation of an operator at the same station as the screw-driving and pressing connector, the waste of personnel and the waste of anchor clamps preparation have been reduced, have reduced the work step that the operator frequently changed anchor clamps, and convenient operation is used, and then has improved the result of use that this two unifications were beaten screw tool.

The inner side wall of the positioning groove 101 is provided with a plurality of connecting notches 102, the connecting notches 102 are internally provided with silica gel blocks 110, the middle position of the top of each silica gel block 110 is provided with a circular groove, the middle position of the inner bottom surface of each circular groove is provided with a limiting hole 111, the inner bottom surface of each connecting notch 102 is provided with a bolt groove 103, a fixing bolt 130 is arranged in each circular groove, one end of each fixing bolt 130 penetrates through the limiting hole 111 to be connected with the bolt groove 103 at the corresponding position in a screwing manner, the silica gel blocks 110 are conveniently installed and fixed by the aid of the bolt grooves 103, the limiting holes 111, the circular grooves and the fixing bolts 130, the middle position of the other end of one side of the screw beating cover plate 220 is fixedly connected with a first handle 230, the middle position of the other end of the other side of the press cover plate 320 is fixedly connected with a second handle 330, the screw beating cover plate 220 is conveniently rotated by the aid of the first handle 230, and the press cover plate 320 is conveniently rotated by the second handle 330, an infrared sensor 120 is embedded and fixed in the middle of one end of the inner bottom surface of the positioning groove 101, and an infrared sensing plate 322 is embedded and fixed in the middle of one side of the press-fit cover plate 320.

The tray 100 is provided with a first rectangular groove 104 at a position corresponding to the two first connecting blocks 200 at one end, a first limit groove 105 at a middle position of an inner side wall of the first rectangular groove 104, a first rectangular hole 202 at the bottom of the first connecting block 200, a first connecting shell 280 at one side of the first connecting block 200, a first connecting plate 250 slidably connected inside the first connecting shell 280, one end of the first connecting plate 250 slidably connected with the first rectangular hole 202, a first wedge 290 fixedly connected to the other end of the first connecting plate 250, the first wedge 290 clamped with the first limit groove 105 at the corresponding position, a first telescopic rod 260 fixedly connected to both ends of the other side of the first connecting plate 250, a first compression spring 270 fixedly connected to both ends of the other side of the first connecting plate 250, the first telescopic rod 260 located inside the first compression spring 270 at the corresponding position, the inner side wall of the first rectangular hole 202 fixedly connected with one ends of the first telescopic rod 260 and the first compression spring 270 at the corresponding position, one inner side wall of the first connecting shell 280 is fixedly connected with one end of a first telescopic rod 260 and one end of a first compression spring 270 which are arranged at corresponding positions, one end of a first connecting plate 250 is fixedly connected with a first pushing plate 240, one side of the tray 100 is provided with a second rectangular groove 106 corresponding to the positions of two second connecting blocks 300, the middle position of one inner side wall of the second rectangular groove 106 is provided with a second limiting groove 107, the bottom of the second connecting block 300 is provided with a second rectangular hole 303, one side of the second connecting block 300 is provided with a second connecting shell 380, the inside of the second connecting shell 380 is slidably connected with a second connecting plate 350, one end of the second connecting plate 350 is slidably connected with the second rectangular hole 303, the other end of one side of the second connecting plate 350 is fixedly connected with a second wedge block 390, the second wedge block 390 is clamped with the second limiting groove 107 which is arranged at corresponding positions, two ends of the other side of the second connecting plate 350 are fixedly connected with a second 360, and two ends of the other side of the second connecting plate 350 are fixedly connected with a second compression spring 370, the second telescopic rod 360 is located inside the second compression spring 370 at the corresponding position, the inner side wall of the second rectangular hole 303 is fixedly connected with one end of the second telescopic rod 360 and one end of the second compression spring 370 at the corresponding position, the inner side wall of the second connecting shell 380 is fixedly connected with one end of the second telescopic rod 360 and one end of the second compression spring 370 at the corresponding position, and one end of the second connecting plate 350 is fixedly connected with the second pushing plate 340.

The working principle is as follows: when the product pressing device is used, a product is placed into the positioning groove 101 in the tray 100 and covers the screw cover plate 220, the silicon gel block 110 is used for positioning the product, the round hole 221 is used for screwing the product, when the screw is screwed and fixed, the screw cover plate 220 is opened and the pressing cover plate 320 is covered, the silicon gel pressure head 321 on the pressing cover plate 320 is pressed into a connector of the product, so that the product is pressed, when the pressing cover plate 320 is covered, only when one side of the pressing cover plate 320 is in contact with the top of the tray 100, the infrared sensing plate 322 and the infrared sensor 120 are acted, so that whether the pressing cover plate 320 is covered in place or not is judged conveniently by using the infrared sensing plate 322 and the infrared sensor 120, and when the product is pressed, the pressing cover plate 320 is opened and the product is taken out, so that the next time of screwing and pressing of the product is facilitated, the two-in-one screwing jig is further improved in use effect, products to be processed are protected by the screwing cover plate 220 and the pressing cover plate 320, electric screwdriver collision with the products is prevented, product quality is guaranteed, the screwing cover plate 220 and the pressing cover plate 320 are both installed on the tray 100, the operation of an operator at the same station of screwing and pressing connectors is satisfied, personnel waste and clamp manufacturing waste are reduced, the working steps of frequently replacing the clamps by the operator are reduced, operation and use are convenient, when the screwing cover plate 220 and the pressing cover plate 320 are damaged and need to be replaced, the connecting plate I250 and the wedge I290 are moved by pushing the two pushing plates I240, the wedge I290 is separated from the limiting groove I105 at the corresponding position, and therefore the connecting block I200, the rotating rod I210 and the screwing cover plate 220 can be conveniently taken down for replacement, and when the first wedge block 290 is contacted with the tray 100, the first two connecting blocks 200 are continuously pushed, so that the first wedge block 290 moves to the inside of the first connecting shell 280, when the first wedge block 290 moves to the position of the first limiting groove 105, the first wedge block 290 is pushed by the first compression spring 270 to reset, so that the first connecting block 200, the first rotating rod 210 and the screwing cover plate 220 which are replaced are conveniently installed and fixed, the second connecting plate 350 and the second wedge block 390 move by pushing the second two pushing plates 340, so that the second wedge block 390 is separated from the second limiting groove 107 at the corresponding position, so that the second connecting block 300, the second rotating rod 310 and the pressing cover plate 320 are conveniently taken down for replacement, and when the second wedge block 390 is contacted with the tray 100, the second two connecting blocks 300 are continuously pushed, so that the second wedge block 390 moves to the inside of the second connecting shell 380, and when the second wedge block 390 moves to the position of the second limiting groove 107, and the second compression spring 370 is used for pushing the second wedge block 390 to reset, so that the second connecting block 300, the second rotating rod 310 and the press-fit cover plate 320 after replacement can be conveniently installed and fixed.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only, and it will be appreciated by those skilled in the art that various modifications, additions and substitutions can be made to the embodiments described without departing from the scope of the utility model as defined in the appended claims.

Claims

1. The two-in-one screw driving jig comprises a tray (100) and is characterized in that a positioning groove (101) is formed in the middle position of the top of the tray (100), two first connecting blocks (200) are arranged at one end of the tray (100), a first rotating hole (201) is formed in the top of each first connecting block (200), a screw driving cover plate (220) is arranged between the two first connecting blocks (200), a first rotating rod (210) is fixedly connected to one end of the screw driving cover plate (220), two ends of the first rotating rod (210) are respectively and rotatably connected with the first rotating holes (201) in the corresponding positions, a plurality of round holes (221) are formed in the screw driving cover plate (220), two second connecting blocks (300) are arranged at one end of one side of the tray (100), a second rotating hole (301) is formed in the top of each second connecting block (300), and a press fit cover plate (320) is arranged between the two connecting blocks (300), one end of pressfitting apron (320) has linked firmly dwang two (310), and dwang two (310) both ends rotate with two (301) rotation holes that correspond position department respectively and are connected, the other end of pressfitting apron (320) one side has linked firmly silica gel pressure head (321).

2. The two-in-one screw driving jig is characterized in that a plurality of connecting notches (102) are formed in the inner side wall of the positioning groove (101), silica gel blocks (110) are arranged inside the connecting notches (102), a circular groove is formed in the middle of the top of each silica gel block (110), a limiting hole (111) is formed in the middle of the inner bottom surface of each circular groove, a bolt groove (103) is formed in the inner bottom surface of each connecting notch (102), a fixing bolt (130) is arranged inside each circular groove, and one end of each fixing bolt (130) penetrates through each limiting hole (111) to be connected with the corresponding bolt groove (103) in a screwing mode.

3. The two-in-one screwing jig is characterized in that a first handle (230) is fixedly connected to the middle position of the other end of one side of the screwing cover plate (220), and a second handle (330) is fixedly connected to the middle position of the other end of the pressing cover plate (320).

4. The two-in-one screw driving jig according to claim 1, wherein the infrared sensor (120) is embedded and fixed at a middle position of one end of the inner bottom surface of the positioning groove (101), and the infrared sensing plate (322) is embedded and fixed at a middle position of one side of the press-fit cover plate (320).

5. The two-in-one screwing jig as claimed in claim 1, wherein one end of the tray (100) is provided with a first rectangular groove (104) at a position corresponding to the first two connecting blocks (200), a first limiting groove (105) is provided at a position corresponding to an intermediate position of an inner side wall of the first rectangular groove (104), a first rectangular hole (202) is provided at the bottom of the first connecting block (200), one side of the first connecting block (200) is provided with a first connecting shell (280), the first connecting plate (250) is slidably connected inside the first connecting shell (280), one end of the first connecting plate (250) is slidably connected with the first rectangular hole (202), the other end of one side of the first connecting plate (250) is fixedly connected with a first wedge block (290), the first wedge block (290) is clamped with the first limiting groove (105) at a corresponding position, and both ends of the other side of the first connecting plate (250) are fixedly connected with a telescopic rod (260), the both ends of connecting plate (250) opposite side all have linked firmly compression spring (270), and telescopic link (260) are located the inside of compression spring (270) of corresponding position department, a rectangular hole (202) inside wall links firmly with the one end of telescopic link (260) and compression spring (270) of corresponding position department, connect shell (280) inside wall and the one end of telescopic link (260) and compression spring (270) of corresponding position department and link firmly, the one end of connecting plate (250) has linked firmly slurcam (240).

6. The two-in-one screwing jig as claimed in claim 1, wherein a rectangular groove II (106) is formed in one side of the tray (100) at a position corresponding to two connecting blocks II (300), a limiting groove II (107) is formed in the middle position of an inner side wall of the rectangular groove II (106), a rectangular hole II (303) is formed in the bottom of the connecting block II (300), a connecting shell II (380) is arranged on one side of the connecting block II (300), a connecting plate II (350) is slidably connected inside the connecting shell II (380), one end of the connecting plate II (350) is slidably connected with the rectangular hole II (303), a wedge block II (390) is fixedly connected to the other end of one side of the connecting plate II (350), the wedge block II (390) is clamped with the limiting groove II (107) at the corresponding position, and two telescopic rods II (360) are fixedly connected to the two ends of the other side of the connecting plate II (350), the both ends of two (350) opposite sides of connecting plate have all linked firmly two (370) of compression spring, and two (360) of telescopic link are located the inside of two (370) of compression spring of corresponding position department, two (303) inside walls of rectangular hole link firmly with the one end of two (360) of telescopic link and two (370) of compression spring of corresponding position department, two (380) inside walls of connecting shell link firmly with the one end of two (360) of telescopic link and two (370) of compression spring of corresponding position department, the one end of two (350) of connecting plate has linked firmly two (340) of slurcam.