阅读说明：本技术 一种伸缩自锁型旅游用便携型支撑扶杆 (Telescopic self-locking type portable supporting handrail for tourism ) 是由 乔光辉 于 2020-12-21 设计创作，主要内容包括：本发明公开了一种伸缩自锁型旅游用便携型支撑扶杆,包括支撑扶杆主体和第一固定把手主体,所述支撑扶杆主体顶端设置有第一固定把手主体,所述支撑扶杆主体内部设置有伸缩自锁机构,且伸缩自锁机构包括第一腔室,所述支撑扶杆主体内部开设有第一腔室。本发明解决了支撑扶杆不能够进行调节且使用时不够稳定,停止使用后不便进行收纳的问题,通过设置该机构,令不同游客能够手动进行调节相应的长度,增加了游客使用时相应的舒适度,提高了该装置整体的易用性,令支撑扶杆在游客不使用时,能够进行快速收纳,较于以往减少了收纳空间,大大提高了该装置整体的实用性,令该装置适用较多不同类型的地面,使游客在旅途中,能够支撑的更加稳定。(The invention discloses a telescopic self-locking type portable supporting handrail for traveling, which comprises a supporting handrail main body and a first fixed handle main body, wherein the first fixed handle main body is arranged at the top end of the supporting handrail main body, a telescopic self-locking mechanism is arranged in the supporting handrail main body, the telescopic self-locking mechanism comprises a first cavity, and the first cavity is formed in the supporting handrail main body. The supporting and holding rod mechanism solves the problems that the supporting and holding rod cannot be adjusted and is not stable enough when in use and is inconvenient to store after being stopped in use, different tourists can manually adjust corresponding lengths by arranging the supporting and holding rod mechanism, the corresponding comfort degree of the tourists during use is increased, the whole usability of the device is improved, the supporting and holding rod mechanism can be used for rapidly storing when the tourists are not in use, the storage space is reduced compared with the prior art, the whole practicability of the device is greatly improved, the device is suitable for grounds of more different types, and the tourists can be supported more stably during travel.)

1. The utility model provides a pole is held up with portable support to flexible auto-lock type tourism, holds up pole main part (111) and first fixed handle main part (112) including supporting, support and hold up pole main part (111) top and be provided with first fixed handle main part (112), its characterized in that: the telescopic self-locking mechanism is arranged in the supporting and holding rod main body (111) and comprises a first cavity (211), a first supporting rod (212), a bottom plate (213), a rack plate (214), a gear (215), a rotating rod (216), a knob (217), a first sliding groove (218), a first sliding block (219), a first fixed block (220), a first groove (221), a ball (222), a second groove (223), a trapezoidal limiting block (224), a connecting rod (225), a second fixed block (226), a pull ring (227) and a first spring (228), the first cavity (211) is formed in the supporting and holding rod main body (111), the first supporting rod (212) is inserted in the first cavity (211), the top end of the telescopic first supporting rod (212) is fixedly connected with a first fixed handle main body (112), the rack plate (214) is fixedly connected to the front face of the first supporting rod (212), and the rack plate (214) is positively engaged with a gear (215), a rotating rod (216) penetrates through the gear (215), the outer wall of the rotating rod (216) is fixedly connected to the inner wall of the gear (215), the left side of the rotating rod (216) is movably connected to the inner wall of the first cavity (211) through a bearing, a knob (217) is fixedly connected to one end, away from the inner wall of the first cavity (211), of the rotating rod (216), a second groove (223) is formed in the first supporting rod (212), a trapezoidal limiting block (224) is inserted in the second groove (223), a connecting rod (225) is fixedly connected to the right side of the trapezoidal limiting block (224), the outer wall of the connecting rod (225) penetrates through the inside of the supporting and supporting rod main body (111), a second fixing block (226) is fixedly connected to the right side of the connecting rod (225), and a first spring (228) is fixedly connected, the outer wall of the connecting rod (225) is wound with a first spring (228), the right side of the first spring (228) is fixedly connected to the outer wall of the second fixing block (226), and one end, far away from the outer wall of the second fixing block (226), of the first spring (228) is fixedly connected to the outer wall of the supporting and holding rod main body (111).

2. The portable type of telescopic self-locking type tourism of claim 1 supports and holds up pole, characterized in that: the bottom end of the supporting and supporting rod main body (111) is provided with a turnover mechanism, the turnover mechanism comprises a first side plate (311), a fixed rotating rod (312), a second side plate (313), a second supporting rod (314), a pull rod (315), a second cavity (316), a limiting rod (317), a second spring (318), a second fixed handle (319) and a first connecting plate (320), the bottom end of the supporting and supporting rod main body (111) is fixedly connected with the first side plate (311), the fixed rotating rod (312) penetrates through the first side plate (311), the right side of the fixed rotating rod (312) is fixedly connected with the second side plate (313), the bottom end of the second side plate (313) is fixedly connected with the second supporting rod (314), the pull rod (315) penetrates through the second side plate (313), the left side of the pull rod (315) is inserted into the first side plate (311), and the second cavity (316) is arranged inside the pull rod (315), and inside the inserting of second chamber (316) is equipped with gag lever post (317), gag lever post (317) top fixed connection is in second chamber (316) inner wall, and gag lever post (317) left side fixedly connected with second spring (318), the left one end fixed connection in second chamber (316) inner wall of gag lever post (317) is kept away from in second spring (318), pull rod (315) right side fixedly connected with second fixed handle (319), and second fixed handle (319) left side laminating has first connecting plate (320), first connecting plate (320) left side fixed connection is in second curb plate (313) outer wall.

3. The portable type of telescopic self-locking tourism that supports of claim 2 wherein: a buffer mechanism is arranged inside the second supporting rod (314), the buffer mechanism comprises a third cavity (411), a fixed column (412), a second sliding groove (413), a second sliding block (414), a buffer column (415), a fourth cavity (416), a third spring (417), a second connecting plate (418), a rubber pad (419) and an arc-shaped plate (420), the third cavity (411) is formed inside the second supporting rod (314), the fixed column (412) is fixedly connected to the inner wall of the third cavity (411), the second sliding groove (413) is formed inside the third cavity (411), the second sliding groove (413) is slidably connected to the inside of the second sliding groove (413), the buffer column (415) is fixedly connected to the right side of the second sliding block (414), the top end of the buffer column (415) is inserted into the third cavity (411), the fourth cavity (416) is formed inside the buffer column (415), and fourth chamber (416) is inside to be inserted and is equipped with fixed column (412), the outer wall winding of fixed column (412) has third spring (417), and third spring (417) top fixed connection in third chamber (411) inner wall, the one end fixed connection in cushion column (415) outer wall that third chamber (411) inner wall was kept away from in third spring (417), and cushion column (415) bottom fixed connection has arc (420).

4. The portable type of telescopic self-locking type tourism of claim 1 supports and holds up pole, characterized in that: the bottom end of the first supporting rod (212) is fixedly connected with a bottom plate (213), and the bottom end of the bottom plate (213) is attached to the inner wall of the first cavity (211).

5. The portable type of telescopic self-locking type tourism of claim 1 supports and holds up pole, characterized in that: first spout (218) have been seted up to first cavity (211) inside, and first spout (218) inside sliding connection has first slider (219), first slider (219) left side fixed connection is in first bracing piece (212) outer wall.

6. The portable self-locking type supporting handrail for tourism of claim 5, wherein: the inner wall of the first sliding groove (218) is fixedly connected with a first fixing block (220), and the top end of the first fixing block (220) is attached to the outer wall of the first sliding block (219).

7. The portable type of telescopic self-locking type tourism of claim 1 supports and holds up pole, characterized in that: first recess (221) have been seted up to support handrail main part (111) inside, and first recess (221) inner wall has ball (222) through pivot swing joint, ball (222) top is laminated in dwang (216) outer wall.

8. The portable type of claim 3, wherein the telescopic self-locking type of the supporting handrail for tourists is characterized in that: the bottom end of the fixing column (412) is fixedly connected with a second connecting plate (418), and a rubber pad (419) is glued to the bottom end of the second connecting plate (418).

Technical Field

The invention relates to the technical field of supporting holding rods, in particular to a telescopic self-locking portable supporting holding rod for tourism.

Background

With the development of economic progress and science and technology, the modern tourism industry is continuously developed, the tourism industry is a comprehensive industry which is specially or mainly used for soliciting, receiving tourists and providing six links such as transportation, tourism, accommodation, catering, shopping, entertainment and the like for the tourism industry by virtue of tourism resources and facilities, and people often use supporting support rods due to insufficient physical strength during the journey of tourism and sightseeing so as to be convenient for subsequently recovering physical strength, so that the existing supporting support rods for tourism basically meet the requirements of people, but still have some problems.

Present tourism is held up pole with supporting is mostly integral type structural design to can not carry out appropriate regulation, lead to and not being fit for the visitor of co-altitude not, and support and hold up the pole volume great, inconvenient when accomodating, the visitor easily produces when using and rocks, has reduced visitor's sense of use, consequently needs a flexible self-locking type tourism to hold up the pole with portable type support and solves above-mentioned problem.

Disclosure of Invention

The invention aims to provide a telescopic self-locking type portable supporting and holding rod for tourists, which aims to solve the problems that the supporting and holding rod provided in the background technology cannot be adjusted, is not stable enough when in use and is inconvenient to store after being stopped in use.

In order to achieve the purpose, the invention provides the following technical scheme: a portable supporting and holding rod for a telescopic self-locking type tour comprises a supporting and holding rod main body and a first fixed handle main body, wherein the top end of the supporting and holding rod main body is provided with the first fixed handle main body, a telescopic self-locking mechanism is arranged inside the supporting and holding rod main body, the telescopic self-locking mechanism comprises a first cavity, a first supporting rod, a bottom plate, a rack plate, a gear, a rotating rod, a knob, a first chute, a first sliding block, a first fixing block, a first groove, a ball, a second groove, a trapezoidal limiting block, a connecting rod, a second fixing block, a pull ring and a first spring, the knob is rotated, the first cavity is formed inside the supporting and holding rod main body, the first supporting rod is inserted inside the first cavity, the top end of the telescopic first supporting rod is fixedly connected with the first fixed handle main body, the rack plate is fixedly connected to the front side of the first supporting rod, and the gear is meshed to, the inside dwang that has run through of gear, and dwang outer wall fixed connection in gear inner wall, bearing swing joint is passed through in first cavity inner wall in the dwang left side, and the dwang keeps away from the one end fixedly connected with knob of first cavity inner wall, the inside second recess that has seted up of first bracing piece, and the inside trapezoidal stopper that is equipped with of inserting of second recess, trapezoidal stopper right side fixedly connected with connecting rod, and the connecting rod outer wall runs through inside the support rest bar main part, connecting rod right side fixedly connected with second fixed block, and the first spring of second fixed block right side fixedly connected with, the winding of connecting rod outer wall has first spring, and first spring right side fixed connection in second fixed block outer wall, the one end fixed connection that the second fixed block outer wall was kept away from to first spring holds up bar main part outer wall in.

Preferably, the bottom end of the supporting and holding rod main body is provided with a turnover mechanism, the turnover mechanism comprises a first side plate, a fixed rotating rod, a second side plate, a second supporting rod, a pull rod, a second cavity, a limiting rod, a second spring, a second fixed handle and a first connecting plate, the bottom end of the supporting and holding rod main body is fixedly connected with the first side plate, the fixed rotating rod penetrates through the first side plate, the right side of the fixed rotating rod is fixedly connected with the second side plate, the bottom end of the second side plate is fixedly connected with the second supporting rod, the pull rod penetrates through the second side plate, the left side of the pull rod is inserted into the first side plate, the second cavity is formed in the pull rod, the limiting rod is inserted into the second cavity, the top end of the limiting rod is fixedly connected to the inner wall of the second cavity, the second spring is fixedly connected to the left side of the limiting rod, the end of the second spring, which is, the fixed handle of pull rod right side fixedly connected with second, and the laminating of the fixed handle left side of second has first connecting plate, first connecting plate left side fixed connection is in second curb plate outer wall.

Preferably, a buffer mechanism is arranged inside the second support rod and comprises a third chamber, a fixed column, a second chute, a second slider, a buffer column, a fourth chamber, a third spring, a second connecting plate, a rubber pad and an arc-shaped plate, the second support rod is internally provided with the third chamber, the inner wall of the third chamber is fixedly connected with the fixed column, the third chamber is internally provided with the second chute, the second chute is internally and slidably connected with the second slider, the right side of the second slider is fixedly connected with the buffer column, the top end of the buffer column is inserted into the third chamber, the buffer column is internally provided with the fourth chamber, the fixed column is inserted into the fourth chamber, the outer wall of the fixed column is wound with the third spring, the top end of the third spring is fixedly connected to the inner wall of the third chamber, and the end of the third spring, which is far away from the inner wall of the third chamber, is fixedly connected to the outer wall of the buffer, and the bottom end of the buffer column is fixedly connected with an arc-shaped plate.

Preferably, the bottom end of the first supporting rod is fixedly connected with a bottom plate, and the bottom end of the bottom plate is attached to the inner wall of the first chamber.

Preferably, a first sliding groove is formed in the first cavity, a first sliding block is connected to the inner portion of the first sliding groove in a sliding mode, and the left side of the first sliding block is fixedly connected to the outer wall of the first supporting rod.

Preferably, the inner wall of the first sliding groove is fixedly connected with a first fixed block, and the top end of the first fixed block is attached to the outer wall of the first sliding block.

Preferably, the first groove is formed in the supporting and holding rod main body, the inner wall of the first groove is movably connected with a ball through a rotating shaft, and the top end of the ball is attached to the outer wall of the rotating rod.

Preferably, the bottom end of the fixed column is fixedly connected with a second connecting plate, and a rubber pad is glued to the bottom end of the second connecting plate.

Compared with the prior art, the invention has the beneficial effects that: the portable supporting handrail for the telescopic self-locking type tourism is provided with a first cavity, a first supporting rod, a bottom plate, a rack plate, a gear, a rotating rod, a knob, a first sliding groove, a first sliding block, a first fixing block, a first groove, a ball, a second groove, a trapezoidal limiting block, a connecting rod, a second fixing block, a pull ring and a first spring, wherein the knob is rotated, the gear is driven to rotate through the rotating rod, the gear drives the rack plate at the rear end to move, the rack plate drives the first supporting rod to move, meanwhile, the first supporting rod drives the first sliding block to slide in the first sliding groove, the first supporting rod can be stabilized while moving upwards through an inclined plane at the bottom end of the trapezoidal limiting block, the first supporting rod is prevented from moving downwards, the problem that the supporting handrail cannot be adjusted is solved, and by the mechanism, different tourists can manually adjust corresponding lengths, the corresponding comfort level of the tourist during use is increased, and the overall usability of the device is improved;

be provided with first curb plate simultaneously, fixed bull stick, the second curb plate, the second bracing piece, the pull rod, the second cavity, the gag lever post, the second spring, second fixed handle and first connecting plate, stimulate the fixed handle of second, it removes at the inside of second curb plate to drive the pull rod, extrude the second spring through the second cavity inner wall, make the second spring produce elastic deformation, break away from the inside of first curb plate until the pull rod left side, upset second curb plate after that, the inconvenient problem of accomodating of support handrail has been solved, through setting up this mechanism, make support handrail when the visitor does not use, can accomodate fast, in the past reduced the storage space, the holistic practicality of the device has been improved greatly.

Still be provided with the third chamber in addition, the fixed column, the second spout, the second slider, the buffering post, the fourth chamber, the third spring, the second connecting plate, rubber pad and arc, when the arc produced the extrusion to ground, the buffering post drives the second slider and removes inside the second spout, make the fixed column remove inside the fourth chamber, make buffering post top produce the extrusion to the third spring, make the third spring produce elastic deformation, the problem of support handrail unstable inadequately has been solved, through setting up this mechanism, make the device be suitable for the ground of more different grade type, make the visitor on the way of traveling, can support more stable.

Drawings

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

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

FIG. 3 is a schematic front view of a partial cross-sectional view of the self-locking mechanism of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 6 is a schematic front view, partially in section, of the canting mechanism of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6 at C according to the present invention;

fig. 8 is a front view partially in section of the cushioning mechanism of the present invention.

In the figure: 111. supporting the handrail main body; 112. a first fixed handle body; 211. a first chamber; 212. a first support bar; 213. a base plate; 214. a rack plate; 215. a gear; 216. rotating the rod; 217. a knob; 218. a first chute; 219. a first slider; 220. a first fixed block; 221. a first groove; 222. a ball bearing; 223. a second groove; 224. a trapezoidal limiting block; 225. a connecting rod; 226. a second fixed block; 227. a pull ring; 228. a first spring; 311. a first side plate; 312. fixing the rotating rod; 313. a second side plate; 314. a second support bar; 315. a pull rod; 316. a second chamber; 317. a limiting rod; 318. a second spring; 319. a second fixed handle; 320. a first connecting plate; 411. a third chamber; 412. fixing a column; 413. a second chute; 414. a second slider; 415. a buffer column; 416. a fourth chamber; 417. a third spring; 418. a second connecting plate; 419. a rubber pad; 420. an arc-shaped plate.

Detailed Description

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

Referring to fig. 1-8, an embodiment of the present invention: a telescopic self-locking type portable supporting handrail for tourism comprises a supporting handrail main body 111 and a first fixed handle main body 112, wherein the top end of the supporting handrail main body 111 is provided with the first fixed handle main body 112, a telescopic self-locking mechanism is arranged inside the supporting handrail main body 111, the telescopic self-locking mechanism comprises a first cavity 211, a first supporting rod 212, a bottom plate 213, a rack plate 214, a gear 215, a rotating rod 216, a knob 217, a first sliding chute 218, a first sliding block 219, a first fixing block 220, a first groove 221, a ball 222, a second groove 223, a trapezoidal limiting block 224, a connecting rod 225, a second fixing block 226, a pull ring 227 and a first spring 228, the first cavity 211 is formed inside the supporting handrail main body 111, the first supporting rod 212 is inserted inside the first cavity 211, the top end of the telescopic first supporting rod 212 is fixedly connected with the first fixed handle main body 112, the rack plate 214 is fixedly connected to the front surface of the first supporting rod 212, and a gear 215 is engaged with the front surface of the rack plate 214, a rotating rod 216 penetrates through the gear 215, the outer wall of the rotating rod 216 is fixedly connected to the inner wall of the gear 215, the left side of the rotating rod 216 is movably connected to the inner wall of the first chamber 211 through a bearing, and one end of the rotating rod 216 far away from the inner wall of the first chamber 211 is fixedly connected with a knob 217, a second groove 223 is formed inside the first supporting rod 212, a trapezoidal limiting block 224 is inserted into the second groove 223, a connecting rod 225 is fixedly connected to the right side of the trapezoidal limiting block 224, and the outer wall of the connecting rod 225 penetrates through the inside of the supporting handrail main body 111, the right side of the connecting rod 225 is fixedly connected with a second fixing block 226, and a first spring 228 is fixedly connected to the right side of the second fixing block 226, the first spring 228 is wound around the outer wall of the connecting rod 225, and the right side of the first spring 228 is fixedly connected to the outer wall of the second fixed block 226, and one end of the first spring 228 away from the outer wall of the second fixed block 226 is fixedly connected to the outer wall of the support handrail main body 111.

The bottom end of the supporting and supporting rod main body 111 is provided with a turnover mechanism, the turnover mechanism comprises a first side plate 311, a fixed rotating rod 312, a second side plate 313, a second supporting rod 314, a pull rod 315, a second chamber 316, a limiting rod 317, a second spring 318, a second fixed handle 319 and a first connecting plate 320, the bottom end of the supporting and supporting rod main body 111 is fixedly connected with the first side plate 311, the fixed rotating rod 312 penetrates through the first side plate 311, the right side of the fixed rotating rod 312 is fixedly connected with the second side plate 313, the bottom end of the second side plate 313 is fixedly connected with the second supporting rod 314, the pull rod 315 penetrates through the second side plate 313, the left side of the pull rod 315 is inserted into the first side plate 311, the second chamber 316 is arranged inside the pull rod 315, the limiting rod 317 is inserted into the second chamber 316, the top end of the limiting rod 317 is fixedly connected to the inner wall of the second chamber 316, and the left side, one end of the second spring 318, which is far away from the left side of the limiting rod 317, is fixedly connected to the inner wall of the second chamber 316, the right side of the pull rod 315 is fixedly connected to a second fixed handle 319, the left side of the second fixed handle 319 is attached to a first connecting plate 320, and the left side of the first connecting plate 320 is fixedly connected to the outer wall of the second side plate 313.

A buffer mechanism is arranged inside the second support rod 314, and the buffer mechanism comprises a third chamber 411, a fixed column 412, a second sliding groove 413, a second sliding block 414, a buffer column 415, a fourth chamber 416, a third spring 417, a second connecting plate 418, a rubber pad 419 and an arc plate 420, the third chamber 411 is arranged inside the second support rod 314, the fixed column 412 is fixedly connected to the inner wall of the third chamber 411, the second sliding groove 413 is arranged inside the third chamber 411, the second sliding groove 413 is slidably connected to the inside of the second sliding groove 413, the buffer column 415 is fixedly connected to the right side of the second sliding block 414, the top end of the buffer column 415 is inserted inside the third chamber 411, the fourth chamber 416 is arranged inside the buffer column 415, the fixed column 412 is inserted inside the fourth chamber 416, the outer wall of the fixed column 412 is wound with a third spring 417, the top end of the third spring 417 is fixedly connected to the inner wall of the third chamber, the end of the third spring 417 far away from the inner wall of the third chamber 411 is fixedly, and the bottom end of the buffer column 415 is fixedly connected with an arc-shaped plate 420.

The bottom end of the first supporting rod 212 is fixedly connected with the bottom plate 213, and the bottom end of the bottom plate 213 is attached to the inner wall of the first chamber 211, so that the first supporting rod 212 is prevented from being separated from the first chamber 211 integrally when the first supporting rod 212 moves in the first chamber 211.

The first sliding groove 218 is formed in the first chamber 211, the first sliding block 219 is slidably connected to the first sliding groove 218, and the left side of the first sliding block 219 is fixedly connected to the outer wall of the first supporting rod 212, so that the stability of the first supporting rod 212 during movement is improved.

The inner wall of the first sliding groove 218 is fixedly connected with a first fixed block 220, and the top end of the first fixed block 220 is attached to the outer wall of the first sliding block 219, so that abrasion to the inner wall of the first sliding groove 218 when the first sliding block 219 moves is reduced.

The supporting handrail main body 111 is internally provided with a first groove 221, the inner wall of the first groove 221 is movably connected with a ball 222 through a rotating shaft, and the top end of the ball 222 is attached to the outer wall of the rotating rod 216, so that when the rotating rod 216 rotates, the abrasion is reduced.

The bottom end of the fixing column 412 is fixedly connected with a second connecting plate 418, and a rubber pad 419 is glued to the bottom end of the second connecting plate 418, so that the fixing column 412 is prevented from being separated from the inside of the fourth cavity 416, and due to the arrangement of the rubber pad 419, the abrasion of the second connecting plate 418 on the inner wall of the fourth cavity 416 under the elastic action of the third spring 417 is relieved.

The working principle is as follows: when adjustment is needed, the knob 217 is rotated first, the gear 215 is driven to rotate through the rotating rod 216, the rotating rod 216 drives the ball 222 to rotate in the first groove 221 when rotating, the gear 215 drives the rack plate 214 at the rear end to move, the rack plate 214 drives the first support rod 212 to move, simultaneously, the first support rod 212 drives the first sliding block 219 to slide in the first sliding groove 218 until the height is needed, the first sliding block stops when the first sliding block stops, the pull ring 227 is pulled first when the first sliding block returns to the original position, the second fixing block 226 drives the connecting rod 225 to move, when the second fixing block 226 moves, the first spring 228 is lifted to make the first spring 228 generate elastic deformation, the connecting rod 225 drives the trapezoidal limiting block 224 to be separated from the interior of the second groove 223 when moving, the knob 217 is then rotated until the base plate 213 is attached to the inner wall of the first chamber 211, and the pull ring 227 is released.

When the storage is needed, the second fixing handle 319 is pulled to drive the pull rod 315 to move inside the second side plate 313, the second spring 318 is extruded through the inner wall of the second chamber 316, the second spring 318 is elastically deformed until the left side of the pull rod 315 is separated from the inside of the first side plate 311, and then the second side plate 313 is turned over.

When the arc plate 420 extrudes the ground, the buffer column 415 drives the second sliding block 414 to move inside the second sliding groove 413, so that the fixed column 412 moves inside the fourth chamber 416, and the top end of the buffer column 415 extrudes the third spring 417, so that the third spring 417 elastically deforms.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.