CN113558413A

CN113558413A - Outdoor beach deck chair with but arbitrary angle regulation function

Info

Publication number: CN113558413A
Application number: CN202110697899.7A
Authority: CN
Inventors: 邵慰忠
Original assignee: Dangshan Xuhe Furniture Co ltd
Current assignee: Dangshan Xuhe Furniture Co ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-10-29

Abstract

The invention relates to the technical field of beach deck chairs, and discloses an outdoor beach deck chair with a function of randomly adjusting angles, which comprises a deck chair, an angle adjusting mechanism, a backrest adjusting mechanism and a height adjusting mechanism, wherein the angle adjusting mechanism comprises a first crank, a first rotating rod, a first gear, a second rotating rod, a hinge, a bolt and a first spring, the outer wall of the first crank is connected with the outer wall of the first rotating rod, the outer wall of the first rotating rod is connected with the inner wall of the deck chair, one end of the first rotating rod penetrates through the outer wall of the deck chair to extend into the inside of the deck chair, the outer wall of the first rotating rod is connected with the inner wall of the first gear, the angle of the second backrest is adjusted by arranging the angle adjusting mechanism, the bolt is inserted into the first rotating rod to fix the first rotating rod after the adjustment, and the aim of adjusting the angle of the backrest of the deck chair by rotating the first rotating rod is achieved, the user can adjust the electric heating device according to personal preferences, and the electric heating device is simple, convenient and quick.

Description

Outdoor beach deck chair with but arbitrary angle regulation function

Technical Field

The invention relates to the technical field of beach deck chairs, in particular to an outdoor beach deck chair with a function of randomly adjusting angles.

Background

A deck chair is one of furniture with new styles and functional purposes appearing in the Qing Dynasty, the late-stage process and the skill of the society established in China are continuously improved, people pay more and more attention to the quality of life, living appliances are classified more and more thin, and the furniture correspondingly produces new varieties like the deck chair, because the deck chair can be more relaxed than the traditional chair, and can be fully relaxed and rested in a half-sleep state, the deck chair is widely applied to hospital nursing chairs, noon break chairs, outdoor leisure chairs and the like, and the mulberry folding deck chair is more convenient and practical, flexible in folding, small in occupied space, convenient to carry and the like; most of the existing beach lounge chairs can not adjust the angle of the backrest, and users sit on the lounge chair with empty backs and are uncomfortable without stress points; there is therefore a need for an outdoor beach lounge chair that can be adjusted in angle.

Disclosure of Invention

The invention aims to provide an outdoor beach lounge chair with the function of freely adjusting the angle, and the aim of solving the problems in the background technology is fulfilled.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an outdoor sandy beach deck chair with but arbitrary angle regulation function, includes deck chair, angle adjustment mechanism, back adjustment mechanism, height adjustment mechanism, angle adjustment mechanism includes crank one, dwang one, gear two, dwang two, hinge, bolt, spring one, locating plate, the outer wall of crank one and the outer wall connection of dwang one.

Preferably, the outer wall of dwang one and the interior wall connection of deck chair, the outer wall that the one end of dwang one runs through the deck chair extends to the inside of deck chair, the outer wall of dwang one and the interior wall connection of gear one, the outer wall that the one end of dwang one runs through gear one extends to the outside of gear one, gear one and two meshing of gear, the inner wall of gear two and the outer wall connection of dwang two for gear one, gear two can obtain the holding power, and gear one can drive gear two rotations simultaneously.

Preferably, the outer wall that the one end of dwang two runs through gear two extends to gear two outside, the outer wall of dwang two and the interior wall connection of deck chair, the outer wall of dwang two and the interior wall connection of fixed plate, the one end of dwang two runs through the outer wall of fixed plate and extends to the outside of fixed plate, the outer wall of fixed plate and the outer wall connection of back two, the outer wall of fixed plate and the interior wall connection of deck chair, the one end of fixed plate runs through the inner wall of deck chair and extends to the outside of deck chair for the fixed plate can drive two removals of back.

Preferably, the outer wall of deck chair and the outer wall connection of hinge, the outer wall of hinge and the outer wall connection of back two, the outer wall of deck chair and the outer wall connection of locating plate, the inner wall of locating plate and the outer wall connection of bolt, the one end of bolt runs through the outside that the outer wall of locating plate extended to the locating plate, the outer wall of bolt and the outer wall connection of spring one, the outer wall of spring one and the outer wall connection of locating plate for spring one can obtain the holding power, can give the elasticity of bolt one to dwang one side.

Preferably, the outside of deck chair is provided with back adjustment mechanism, back adjustment mechanism includes handle, three dwangs, backup pad one, back two, backup pad two, the outer wall of handle and the outer wall connection of three dwangs, the outer wall of three dwangs and the inner wall connection of backup pad one, the one end of three dwangs runs through the outer wall of backup pad one and extends to the outside of backup pad one, the outer wall screw thread setting of handle one side is kept away from to three dwangs for the dwang can drive backup pad one and reciprocate.

Preferably, the outer wall of the first support plate is connected with the outer wall of the first backrest, the outer wall of the first support plate is connected with the inner wall of the second backrest, one end of the first support plate penetrates through the outer wall of the second backrest and extends to the outside of the second backrest, the outer wall of the first backrest is connected with the outer wall of the second support plate, the outer wall of the second support plate is connected with the inner wall of the second backrest, one end of the second support plate penetrates through the inner wall of the second backrest and extends to the inside of the second backrest, one end of the first backrest penetrates through the inner wall of the second backrest and extends to the outside of the second backrest, the outer wall of the first backrest is connected with the inner wall of the second backrest, supporting force can be obtained by the first backrest, and meanwhile the first backrest can extend out of the second backrest.

Preferably, the outside of back two is provided with high adjustment mechanism, high adjustment mechanism includes crank two, dwang four, gear three, rack, locating lever, dead lever, fixture block, spring two, the outer wall of crank two and the outer wall connection of dwang four, the outer wall of dwang four and the inner wall connection of gear three, the one end of dwang four runs through the outer wall of gear three and extends to the outside of gear three for dwang four can drive gear three rotations.

Preferably, gear three and rack toothing, the inner wall of rack and the outer wall connection of locating lever, the one end of locating lever runs through the outer wall of rack and extends to the inside of rack, the outer wall of locating lever and the inner wall connection of dead lever, the outer wall and the ground of dead lever are connected, the outer wall of rack and the outer wall connection of deck chair, the inner wall and the outer wall connection of dwang four of dead lever, the outer wall that the one end of dwang four runs through the dead lever extends to the inside of dead lever, the inner wall that the one end of rack runs through the dead lever extends to the outside of dead lever for the rack can drive the deck chair and remove.

Preferably, the outer wall of the rack is connected with the inner wall of the fixing rod, a clamping groove is formed in the surface of the outer wall of the fixing rod, the inner wall of the clamping groove is connected with the outer wall of the clamping block, the outer wall of the clamping block is connected with the outer wall of the second spring, the outer wall of the second spring is connected with the outer wall of the second crank, the outer wall of the clamping block is connected with the inner wall of the crank, one end of the clamping block penetrates through the outer wall of the crank and extends to the outside of the crank, and therefore the clamping block can limit the crank.

The invention provides an outdoor beach lounge chair with a function of randomly adjusting angles. The method has the following beneficial effects:

(1) according to the invention, the angle adjusting mechanism is arranged, so that the angle of the backrest II is adjusted, and the bolt is inserted into the rotating rod I to fix the backrest after the adjustment is completed, so that the purpose that the angle of the backrest of the deck chair can be adjusted by rotating the crank handle I, and a user can adjust the backrest according to personal preference is achieved, and the purposes of simplicity, convenience and quickness are achieved.

(2) According to the invention, the backrest adjusting mechanism is arranged, and the second supporting plate provides supporting force for the backrest and simultaneously performs limiting, so that the length of the backrest of the deck chair can be adjusted by a user according to the height of the user, the user feels more comfortable when the deck chair is used, and the user experience is enhanced.

(3) The height adjusting mechanism is arranged, so that the height of the deck chair is adjusted, the clamping block is driven to be clamped into the clamping groove formed in the outer wall surface of the fixed rod under the action of the second spring after the adjustment is finished, the purpose that a user can adjust the height of the deck chair according to different use conditions, the adjustment can be finished only by rotating the second crank is achieved, and the deck chair is convenient, simple and convenient to operate.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a front cross-sectional view of the present invention;

FIG. 3 is a block diagram of a first gear of the present invention;

FIG. 4 is a structural view of a second gear of the present invention;

FIG. 5 is a diagram of the first spring of the present invention;

fig. 6 is a structural view of a crank handle two of the present invention.

In the figure: the novel chair comprises a reclining chair 1, a 2-degree adjusting mechanism, a 3-backrest adjusting mechanism, a 4-degree adjusting mechanism, a 201 crank I, a 202 rotating rod I, a 203 gear I, a 204 gear II, a 205 rotating rod II, a 206 hinge, a 207 bolt, a 208 spring I, a 209 positioning plate, a 301 handle, a 302 rotating rod III, a 303 supporting plate I, a 304 backrest I, a 305 backrest II, a 306 supporting plate II, a 401 crank II, a 402 rotating rod IV, a 403 gear III, a 404 rack, a 405 positioning rod, a 406 fixing rod, a 407 clamping block and a 408 spring II.

Detailed Description

As shown in fig. 1 to 6, the present invention provides a technical solution: an outdoor beach lounge chair with a function of randomly adjusting angles comprises a lounge chair 1, an angle adjusting mechanism 2, a backrest adjusting mechanism 3 and a height adjusting mechanism 4, wherein the angle adjusting mechanism 2 comprises a crank handle I201, a rotating rod I202, a gear I203, a gear II 204, a rotating rod II 205, a hinge 206, a bolt 207, a spring I208 and a positioning plate 209, the outer wall of the crank handle I201 is fixedly connected with the outer wall of the rotating rod I202, the outer wall of the rotating rod I202 is movably connected with the inner wall of the lounge chair 1 through a bearing I, one end of the rotating rod I202 penetrates through the outer wall of the lounge chair 1 and extends to the inside of the lounge chair 1, the outer wall of the rotating rod I202 is fixedly connected with the inner wall of the gear I203, one end of the rotating rod I202 penetrates through the outer wall of the gear I203 and extends to the outside of the gear I203, the gear I203 is meshed with the gear II 204, the inner wall of the gear II 204 is fixedly connected with the outer wall of the rotating rod 205, one end of the rotating rod II 205 penetrates through the outer wall of the gear II 204 and extends to the outside of the gear II 204, the outer wall of the rotating rod II 205 and the inner wall of the deck chair 1 are movably connected through a bearing II, the outer wall of the rotating rod II 205 and the inner wall of the fixing plate are fixedly connected, one end of the rotating rod II 205 penetrates through the outer wall of the fixing plate and extends to the outside of the fixing plate, the outer wall of the fixing plate and the outer wall of the backrest II 305 are fixedly connected, the outer wall of the fixing plate is slidably connected with the inner wall of the deck chair 1, one end of the fixing plate penetrates through the inner wall of the deck chair 1 and extends to the outside of the fixing plate, the outer wall of the deck chair 1 and the outer wall of the hinge 206 are fixedly connected, the outer wall of the deck chair 1 and the outer wall of the positioning plate 209 are fixedly connected, the inner wall of the positioning plate 209 and the outer wall of the bolt 207 penetrates through the outer wall of the positioning plate 209 and extends to the outside of the positioning plate 209, the outer wall of bolt 207 and the outer wall fixed connection of spring 208, the outer wall of spring 208 and the outer wall fixed connection of locating plate 209, through setting up angle adjustment mechanism 2, pull out bolt 207 from dwang 202 earlier, then drive dwang 202 through rocking handle 201 and rotate, dwang 202 drives gear 203 to rotate, gear 203 drives gear 204 to rotate, gear 204 drives dwang 205 to rotate, dwang two 205 drive the fixed plate and rotate, the fixed plate drives back two 305 and moves, thereby adjust the angle of back two 305, fix it in inserting dwang 202 with bolt 207 after having adjusted, reached and just can adjust the angle of deck chair 1 back through rotating handle 201, make the user adjust according to individual hobby, simple convenient and fast's purpose.

The outside of the deck chair 1 is provided with a backrest adjusting mechanism 3, the backrest adjusting mechanism 3 comprises a grip 301, a rotating rod three 302, a support plate one 303, a backrest one 304, a backrest two 305 and a support plate two 306, the outer wall of the grip 301 is fixedly connected with the outer wall of the rotating rod three 302, the outer wall of the rotating rod three 302 is in threaded connection with the inner wall of the support plate one 303, one end of the rotating rod three 302 penetrates through the outer wall of the support plate one 303 to extend to the outside of the support plate one 303, the outer wall of the rotating rod three 302 far away from the grip 301 is in threaded connection, the outer wall of the support plate one 303 is fixedly connected with the outer wall of the backrest one 304, the outer wall of the support plate one 303 is in sliding connection with the inner wall of the backrest two 305, one end of the support plate one 303 penetrates through the outer wall of the backrest two 305 to extend to the outside of the backrest two 305, the outer wall of the backrest one 304 is fixedly connected with the outer wall of the support plate two 306, the outer wall of the support plate two 306 is in sliding connection with the inner wall of the backrest two 305, one end of the second support plate 306 penetrates through the inner wall of the second backrest 305 and extends to the inside of the second backrest 305, one end of the first backrest 304 penetrates through the inner wall of the second backrest 305 and extends to the outside of the second backrest 305, the outer wall of the first backrest 304 is in sliding connection with the inner wall of the second backrest 305, through the arrangement of the backrest adjusting mechanism 3, the third rotating rod 302 is driven to rotate by rotating the handle 301, the third rotating rod 302 drives the first support plate 303 to rotate, the second backrest 305 limits the first support plate 303, the first support plate 303 can move up and down, the first support plate 303 drives the first backrest 304 to move, the second support plate 306 limits the first backrest 304 while providing supporting force, the length of the backrest of the reclining chair 1 can be adjusted by a user according to the height of the user, the user is more comfortable when the user is used, and the purpose of enhancing the user experience is achieved.

The outer part of the backrest II 305 is provided with a height adjusting mechanism 4, the height adjusting mechanism 4 comprises a crank handle II 401, a rotating rod IV 402, a gear III 403, a rack 404, a positioning rod 405, a fixing rod 406, a clamping block 407 and a spring II 408, the outer wall of the crank handle II 401 is fixedly connected with the outer wall of the rotating rod IV 402, the outer wall of the rotating rod IV 402 is fixedly connected with the inner wall of the gear III 403, one end of the rotating rod IV 402 penetrates through the outer wall of the gear III 403 to extend to the outer part of the gear III 403, the gear III 403 is meshed with the rack 404, the inner wall of the rack 404 is slidably connected with the outer wall of the positioning rod 405, one end of the positioning rod 405 penetrates through the outer wall of the rack 404 to extend to the inner part of the rack 404, the outer wall of the positioning rod 405 is fixedly connected with the inner wall of the fixing rod 406, the outer wall of the fixing rod 406 is fixedly connected with the ground, the outer wall of the rack 404 is fixedly connected with the outer wall of the reclining chair 1, the inner wall of the fixing rod 406 is movably connected with the outer wall of the rotating rod IV 402 through a bearing III, one end of a rotating rod four 402 penetrates through the outer wall of the fixing rod 406 and extends to the inside of the fixing rod 406, one end of a rack 404 penetrates through the inner wall of the fixing rod 406 and extends to the outside of the fixing rod 406, the outer wall of the rack 404 is in sliding connection with the inner wall of the fixing rod 406, a clamping groove is formed in the surface of the outer wall of the fixing rod 406, the inner wall of the clamping groove is in sliding connection with the outer wall of a clamping block 407, the outer wall of the clamping block 407 is fixedly connected with the outer wall of a spring two 408, the outer wall of the spring two 408 is fixedly connected with the outer wall of a crank two 401, the outer wall of the clamping block 407 is in sliding connection with the inner wall of the crank 401, one end of the clamping block 407 penetrates through the outer wall of the crank 401 and extends to the outside of the crank 401, through the height adjusting mechanism 4, the rotating rod four 402 is driven to rotate by rotating the crank two 401, the rotating rod four 402 drives a gear three 403 to rotate, the gear 404 is driven by the three gear 403 to drive the rack 404 to move, the positioning rod 405 to provide supporting force and simultaneously limit the rack 404, dead lever 406 provides the holding power for dwang four 402, dead lever 406 provides the holding power for dead lever 405, make rack 404 can drive deck chair 1 and remove, thereby adjust deck chair 1's height, it can to drive in the draw-in groove that fixture block 407 card income dead lever 406 outer wall surface was seted up under spring two 408's effect after the regulation is accomplished, it can adjust deck chair 1's height according to the in service behavior of difference to have reached the user, only need rotate crank two 401 and can accomplish the regulation, the convenient simple purpose of being convenient for the operation.

When the angle adjusting mechanism 2 is used, the bolt 207 is firstly pulled out from the first rotating rod 202, then the first rotating rod 202 is driven to rotate by shaking the first crank 201, the first rotating rod 202 drives the first gear 203 to rotate, the first gear 203 drives the second gear 204 to rotate, the second gear 204 drives the second rotating rod 205 to rotate, the second rotating rod 205 drives the fixing plate to rotate, the fixing plate drives the second backrest 305 to move, so that the angle of the second backrest 305 is adjusted, the bolt 207 is inserted into the first rotating rod 202 to be fixed after the adjustment is finished, the purpose that the angle of the backrest of the deck chair 1 can be adjusted by rotating the first crank 201 is achieved, a user can adjust the angle of the backrest according to personal preferences, the aim of simplicity, convenience and quickness is achieved, by arranging the backrest adjusting mechanism 3, the third rotating rod 302 is driven to rotate by rotating the handle 301, the first rotating rod 302 drives the first supporting plate 303 to rotate, the backrest II 305 limits the support plate I303, so that the support plate I303 can move up and down, the support plate I303 drives the backrest I304 to move, the support plate II 306 provides support force for the backrest I304 and limits the support force, the purpose that a user can adjust the length of the backrest of the deck chair 1 according to the height of the user is achieved, the user is more comfortable when the user uses the deck chair, the user experience is enhanced, by arranging the height adjusting mechanism 4, the crank II 401 is rotated to drive the crank IV 402 to rotate, the crank IV 402 drives the gear III 403 to rotate, the gear III 403 drives the rack 404 to move, the positioning rod 405 provides support force for the rack 404 and limits the rack 404, the fixing rod 406 provides support force for the crank IV 402, the fixing rod 406 provides support force for the positioning rod 405, so that the rack 404 can drive the deck chair 1 to move, and the height of the deck chair 1 is adjusted, after the adjustment is completed, the clamping block 407 is driven to be clamped into the clamping groove formed in the surface of the outer wall of the fixing rod 406 under the action of the second spring 408, so that the purpose that the height of the deck chair 1 can be adjusted by a user according to different use conditions, the adjustment can be completed only by rotating the second crank 401, and the operation is convenient, simple and convenient.

In conclusion, although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made herein 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 an outdoor sandy beach deck chair with but arbitrary angle regulation function, includes deck chair (1), angle adjustment mechanism (2), back adjustment mechanism (3), height adjustment mechanism (4), its characterized in that: the angle adjusting mechanism (2) comprises a crank I (201), a rotating rod I (202), a gear I (203), a gear II (204), a rotating rod II (205), a hinge (206), a bolt (207), a spring I (208) and a positioning plate (209), and the outer wall of the crank I (201) is connected with the outer wall of the rotating rod I (202).

2. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 1, which is characterized in that: the outer wall of dwang one (202) and the interior wall connection of deck chair (1), the one end of dwang one (202) runs through the outer wall of deck chair (1) and extends to the inside of deck chair (1), the outer wall of dwang one (202) and the interior wall connection of gear one (203), the one end of dwang one (202) runs through the outer wall of gear one (203) and extends to the outside of gear one (203), gear one (203) and two (204) meshing of gear, the inner wall of gear two (204) and the outer wall connection of dwang two (205).

3. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 2, which is characterized in that: the outer wall that the one end of dwang two (205) runs through gear two (204) extends to the outside of gear two (204), the outer wall of dwang two (205) and the interior wall connection of deck chair (1), the outer wall of dwang two (205) and the interior wall connection of fixed plate, the outer wall that the one end of dwang two (205) runs through the fixed plate extends to the outside of fixed plate, the outer wall of fixed plate and the outer wall connection of back two (305), the outer wall of fixed plate and the interior wall connection of deck chair (1), the one end of fixed plate runs through the inner wall of deck chair (1) and extends to the outside of deck chair (1).

4. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 3, which is characterized in that: the outer wall of deck chair (1) and the outer wall connection of hinge (206), the outer wall of hinge (206) and the outer wall connection of back two (305), the outer wall of deck chair (1) and the outer wall connection of locating plate (209), the inner wall of locating plate (209) and the outer wall connection of bolt (207), the one end of bolt (207) is run through the outer wall of locating plate (209) and is extended to the outside of locating plate (209), the outer wall of bolt (207) and the outer wall connection of spring one (208), the outer wall of spring one (208) and the outer wall connection of locating plate (209).

5. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 4, which is characterized in that: the outside of deck chair (1) is provided with back adjustment mechanism (3), back adjustment mechanism (3) are including handle (301), dwang three (302), backup pad (303), back (304), back two (305), backup pad two (306), the outer wall of handle (301) and the outer wall connection of dwang three (302), the outer wall and the inner wall connection of backup pad (303) of dwang three (302), the one end of dwang three (302) runs through the outer wall of backup pad (303) and extends to the outside of backup pad (303), the outer wall screw thread setting of handle (301) one side is kept away from in dwang three (302).

6. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 5, which is characterized in that: the outer wall of the support plate I (303) is connected with the outer wall of the backrest I (304), the outer wall of the support plate I (303) is connected with the inner wall of the backrest II (305), one end of the support plate I (303) penetrates through the outer wall of the backrest II (305) and extends to the outside of the backrest II (305), the outer wall of the backrest I (304) is connected with the outer wall of the support plate II (306), the outer wall of the support plate II (306) is connected with the inner wall of the backrest II (305), one end of the support plate II (306) penetrates through the inner wall of the backrest II (305) and extends to the inside of the backrest II (305), one end of the backrest I (304) penetrates through the inner wall of the backrest II (305) and extends to the outside of the backrest II (305), and the outer wall of the backrest I (304) is connected with the inner wall of the backrest II (305).

7. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 6, which is characterized in that: the outside of back two (305) is provided with height adjusting mechanism (4), height adjusting mechanism (4) include crank two (401), dwang four (402), three (403) of gear, rack (404), locating lever (405), dead lever (406), fixture block (407), spring two (408), the outer wall of crank two (401) and the outer wall connection of dwang four (402), the outer wall of dwang four (402) and the inner wall connection of gear three (403), the outer wall that the one end of dwang four (402) runs through gear three (403) extends to the outside of gear three (403).

8. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 7, which is characterized in that: the utility model discloses a reclining chair, including gear three (403), rack (404), the inner wall of rack (404) and the outer wall connection of locating lever (405), the one end of locating lever (405) runs through the outer wall of rack (404) and extends to the inside of rack (404), the outer wall of locating lever (405) and the inner wall connection of dead lever (406), the outer wall and the ground of dead lever (406) are connected, the outer wall of rack (404) and the outer wall connection of deck chair (1), the inner wall of dead lever (406) and the outer wall connection of dwang four (402), the outer wall that the one end of dwang four (402) runs through dead lever (406) extends to the inside of dead lever (406), the inner wall that the one end of rack (404) runs through dead lever (406) extends to the outside of dead lever (406).

9. The outdoor beach lounge chair with the function of freely adjusting the angle of claim 8, which is characterized in that: the outer wall of the rack (404) is connected with the inner wall of the fixing rod (406), a clamping groove is formed in the surface of the outer wall of the fixing rod (406), the inner wall of the clamping groove is connected with the outer wall of a clamping block (407), the outer wall of the clamping block (407) is connected with the outer wall of a spring II (408), the outer wall of the spring II (408) is connected with the outer wall of the crank II (401), the outer wall of the clamping block (407) is connected with the inner wall of the crank (401), and one end of the clamping block (407) penetrates through the outer wall of the crank (401) and extends to the outside of the crank (401).