CN216070333U - Folding scooter - Google Patents

Abstract

The utility model discloses a folding scooter, which comprises a pedal, a vertical pipe and a handlebar, wherein the handlebar is arranged at the upper part of the vertical pipe, wheels are respectively arranged on the pedal and the vertical pipe, the pedal and the vertical pipe are arranged in a folding way through a folding mechanism, the folding mechanism comprises a folding support, a rotating part, a connecting rod assembly and two groups of locking parts, the folding support is respectively rotatably connected with the pedal and the vertical pipe, a plurality of locking grooves are respectively arranged on the circumferences of the rotating positions of the pedal and the vertical pipe, the rotating part is rotatably arranged on the folding support, the locking parts are arranged on the folding support in a sliding way, and the rotating part and the locking parts are connected and linked through the connecting rod assembly; when the rotating piece rotates forwards or reversely, the locking piece is driven to be close to or far away from the locking groove. The scooter of the utility model occupies small space in a folded state, and is convenient for pushing and upright storage.

Description

Folding scooter

Technical Field

The utility model relates to the field of vehicles, in particular to a folding scooter.

Background

In order to facilitate travel and realize low carbon and environmental protection, more and more people abandon driving automobiles and select bicycles or electric vehicles; wherein electric scooter is selected by more and more people and is used, and its small in size is convenient for accomodate to it is more easy to travel in the non-motor way and the pedestrian passageway in little space.

At present, a locking structure is arranged at or near the connecting position of a vertical pipe with a handle and a pedal for riding, and after the locking structure is unlocked, the vertical pipe is turned over towards the pedal through the rotation of a shaft structure, so that the overall volume is reduced, and the storage is realized; however, the conventional folding method can only accommodate the scooter, and in case some users need to travel but do not want to ride the scooter, the conventional folding method cannot realize the pushing function.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a folding scooter, which is characterized in that the folding mechanism is arranged, so that the overall size of a pedal and a vertical pipe is reduced after the pedal and the vertical pipe are folded, the height state of the vertical pipe is kept, wheels are supported by landing, a user can conveniently push or place and store the folding scooter, and the using mode of the folding scooter is enriched.

The utility model adopts the following technical scheme: a folding scooter comprises a pedal, a vertical pipe and a handlebar, wherein the handlebar is arranged on the upper portion of the vertical pipe, the pedal and the vertical pipe are respectively provided with a wheel, the pedal and the vertical pipe are arranged in a folding mode through a folding mechanism, the folding mechanism comprises a folding support, a rotating part, a connecting rod assembly and two groups of locking parts, the folding support is respectively rotatably connected with the pedal and the vertical pipe, the pedal and the vertical pipe are respectively provided with a plurality of locking grooves on the circumference of the rotating position, the rotating part is rotatably arranged on the folding support, the locking parts are arranged on the folding support in a sliding mode, and the rotating part and the locking parts are connected and linked through the connecting rod assembly; when the rotating piece rotates forwards or reversely, the locking piece is driven to be close to or far away from the locking groove.

As an improvement, the rotating piece comprises a rotating shaft which can be rotatably arranged on the folding bracket, a handle which is connected with the rotating shaft and a first elastic piece which is connected with the rotating shaft and the folding bracket, when the handle is operated, the rotating shaft is driven to rotate so as to enable the locking piece to be separated from the locking groove, and the first elastic piece is twisted to store force; the restoring force of the first elastic piece drives the locking piece and the rotating shaft to reset.

As an improvement, the handle is also provided with a limiting assembly, the limiting assembly comprises an auxiliary handle arranged on the handle in a sliding manner, a limiting block connected to the auxiliary handle and a second elastic piece abutted to the auxiliary handle and the handle, a stop block matched with the limiting block is arranged on the folding bracket, the limiting block is clamped at the stop block to limit the handle at an initial position of the handle, so that the handle cannot rotate, the limiting block is driven to displace to remove the abutment with the stop block when the auxiliary handle is operated, the handle can rotate, and meanwhile, the second elastic piece stores force; the restoring force of the second elastic piece drives the auxiliary handle and the limiting block to reset.

As an improvement, the handle includes the main support, set up in the grip ring of main support one end, set up in the arrangement board at main support middle part and set up in the limiting plate of the main support other end, set up the cylinder between arrangement board and the limiting plate and supply second elastic component and limiting block cover to establish, and vice handle wears to locate to slide on the arrangement board, and vice handle forms vice grip ring in grip ring department.

As an improvement, the limiting block or/and the stop block are/is provided with an inclined plane, when the handle is reset, the limiting block and the stop block are abutted and abutted through the inclined plane, when the limiting block crosses the stop block, the restoring force of the second elastic part drives the auxiliary handle and the limiting block to reset, and the limiting block is clamped at the stop block.

As an improvement, the connecting rod component comprises a first rod arranged on two sides of the rotating shaft and a second rod rotatably connected with the first rod, and the second rods on the two sides are respectively connected to two ends of the locking piece.

As an improvement, the second pole includes the spiral shell bucket at middle part and the screw rod of screwed connection in the spiral shell bucket both ends, and the screw rod at both ends rotates with first pole, locking piece respectively to be connected, and spiral shell bucket and screw rod are through the whole length of rotation regulation.

As an improvement, the locking piece is the cylinder, sets up the waist shape hole that supplies the locking piece both sides to slide on the folding support, and the size looks adaptation of locking groove and locking piece.

As an improvement, the folding support comprises two bilaterally symmetrical sub-support bodies, the two ends of each sub-support body are respectively rotatably connected with the pedals and the vertical pipe, the middle parts of the two sub-support bodies are connected through a connecting shaft, the connecting shaft is hollow and is used for accommodating the rotating shaft to rotate in the connecting shaft, and an opening for the handle to extend out for movement is formed.

The utility model has the beneficial effects that: through the arrangement of the specific folding mechanism, the pedals can be rotatably stored in multiple sections relative to the vertical pipe, so that the pedals are transversely arranged in the unfolding state for a user to ride normally, and are folded towards the vertical pipe when being stored in the folding state, and the length of the scooter is effectively shortened as the pedals are close to the vertical pipe, so that the storage purpose is achieved; the front end of the vertically arranged pedal faces upwards, the rear end of the vertically arranged pedal faces downwards, and the front wheel and the rear wheel are kept in a landing state, so that a user can push the scooter by holding the handlebar, and the scooter is convenient to advance and use when not riding; under fold condition, the scooter can be vertically parked by arranging the foot supports, the occupied space is smaller, and the scooter can be more conveniently adjusted and stored indoors.

Drawings

Fig. 1 is a schematic cross-sectional view and a partially enlarged view of the folding scooter of the present invention in an unfolded state.

Fig. 2 is a schematic cross-sectional view of the folding scooter of the present invention in a folded state.

Fig. 3 is a schematic view of the folding mechanism of the present invention.

Fig. 4 is a partial perspective view of the folding mechanism of the present invention.

Fig. 5 is a schematic perspective view of the folding mechanism of the present invention viewed from the front.

Fig. 6 is a schematic perspective view of the folding mechanism of the present invention viewed from the back.

Detailed Description

The following detailed description of specific embodiments of the utility model refers to the accompanying drawings.

As shown in fig. 1, 2, 3, 4, 5 and 6, a folding scooter according to an embodiment of the present invention is provided. The embodiment comprises a pedal 1, a vertical pipe 2 and a handlebar 3, wherein the handlebar 3 is arranged on the upper part of the vertical pipe 2, wheels 4 are respectively arranged on the pedal 1 and the vertical pipe 2, the pedal 1 and the vertical pipe 2 are arranged in a foldable manner through a folding mechanism 0, the folding mechanism 0 comprises a folding support 01, a rotating part 00, a connecting rod assembly 02 and two locking parts 03, the folding support 01 is respectively rotatably connected with the pedal 1 and the vertical pipe 2, a plurality of locking grooves 5 are respectively arranged on the circumferences of the rotating positions of the pedal 1 and the vertical pipe 2, the rotating part 00 is rotatably arranged on the folding support 01, the locking parts 03 can be arranged on the folding support 01 in a sliding manner, and the rotating part 00 and the locking parts 03 are connected and linked through the connecting rod assembly 02; when the rotating member 00 rotates forward or backward, the locking member 03 is driven to approach or separate from the locking groove 5.

When the utility model is used, the pedal 1 and the stand pipe 2 are provided with shafts, the folding bracket 01 is provided with holes for rotatable connection and matching, and the periphery of the shafts or the periphery of the brackets is provided with a plurality of locking grooves 5. As shown in fig. 1, two sets of locking members 03 are locked by a locking groove 5 at one position of the pedal 1 and the vertical tube 2, and are unfolded and locked, at this time, the scooter is in a normal unfolded state, the wheels 4 on the vertical tube 2 and the wheels 4 at the rear end of the pedal 1 are supported on the ground, the pedal 1 is horizontally arranged for a user to ride, the vertical tube 2 is vertically arranged, a handle above the vertical tube is held by the user, and the scooter is normally used. When the scooter needs to be stored, a user operates the rotating piece 00, the rotating piece 00 drives the connecting rod assembly 02, the locking pieces 03 leave two expansion locking positions, at the moment, the pedal 1, the folding support 01 and the vertical pipe 2 can rotate freely, as shown in fig. 2, when structurally rotating to the state that two groups of locking pieces 03 are opposite to the other locking groove 5, the locking pieces 03 are in the folding locking positions, the locking pieces 03 are reset and locked in the locking grooves 5, the pedal 1, the folding support 01 and the vertical pipe 2 are similar to N-shaped, the length of the scooter in the folding state is greatly reduced, and the occupied space volume is effectively reduced; the state is put unchangeably to riser 2's the perpendicular of this moment, footboard 1 is erect and is put, wheel 4 on riser 2 and the footboard 1 keeps supporting in ground, the user can hold handle 3 to carry out the scooter this moment, good extension the service environment of scooter, when the user does not want to ride or for example when entering into indoor, can carry out the scooter under fold condition, needn't still go the transport like traditional folding scooter, more light is simple and easy, occupation space does not, do not disturb other people. The scooter under fold condition accessible makes the scooter stand upright and parks at the heel brace that the wheel position set up, and the space that occupies is little, is more convenient for indoor adjustment and deposit. On the basis of the above embodiment, locking groove 5 of more circumference positions can also be set up as required, footboard 1 and folding support 01, folding support 01 and riser 2 stop the locking in the folding position of different angles in the time, satisfy different user demands, for example make folding support 01 and riser 2 produce required contained angle and hang the transported object, for example footboard 1 relative adjustment have certain angle with ground, satisfy the ride needs of enjoyment.

As a modified embodiment, the rotating member 00 includes a rotating shaft 001 rotatably disposed on the folding bracket 01, a handle 002 connected to the rotating shaft 001, and a first elastic member 003 connected to the rotating shaft 001 and the folding bracket 01, when the handle 002 is operated, the rotating shaft 001 is driven to rotate so that the locking member 03 is disengaged from the locking groove 5, and the first elastic member 003 is torsionally accumulated; the restoring force of the first elastic member 003 drives the locking member 03 and the rotation shaft 001 to be reset.

As shown in fig. 3, 4, 5 and 6, the rotating member 00 is disposed in the middle of the folding bracket 01, the two sides of the rotating member extend along the inner cavity of the housing of the folding bracket 01 to form a connecting rod assembly 02, and the connecting rod assembly 02 is connected with the locking member 03; through the rotation of rotating member 00, can drive the linkage of link assembly 02, locking piece 03, just can correspond the reciprocating motion of locking piece 03 in the positive and negative rotation, good realization locking and unblock. Wherein rotating member 00 can set up one set ofly, and link assembly 02 adopts two sets of to connect locking piece 03, realizes the locking and the unblock of once-through operation going two positions of synchronous control, is favorable to the simplification of structure, the simplification of operation. The rotating member 00 is specifically that the rotating shaft 001 is rotatably arranged on the folding bracket 01, and the rotating shaft 001 is easily rotated by the handle 002 connected with the rotating member; further the first elastic component 003 that sets up, the locking that resets that comes good keeping locking piece 03 and pivot 001, first elastic component 003 can set up to the torsional spring, drives it and twists reverse when pivot 001 is rotatory and hold power, can provide the restoring force after the user releases the hand and make overall structure reset, guarantee that locking piece 03 is good locks in locking groove 5, guarantee that handle 002 returns initial position and does not influence the normal use of scooter.

As an improved specific embodiment, the handle 002 is further provided with a limiting assembly 6, the limiting assembly 6 comprises an auxiliary handle 61 slidably arranged on the handle 002, a limiting block 62 connected to the auxiliary handle 61, and a second elastic member 63 abutted against the auxiliary handle 61 and the handle 002, the folding bracket 01 is provided with a stop block 011 matched with the limiting block 62, the limiting block 62 is clamped at the stop block 011 to limit the handle 002 to be incapable of rotating when the handle 002 is at an initial position, the limiting block 62 is driven to displace to release the abutment against the stop block 011 when the auxiliary handle 61 is operated, so that the handle 002 can rotate, and meanwhile, the second elastic member 63 stores force; the restoring force of the second elastic member 63 drives the sub-handle 61 and the stopper 62 to be reset.

As shown in fig. 5 and 6, in order to further improve the stability of the locking member 03 for locking the scooter, a limiting component 6 is provided. Under initial limit state, stopper 62 can receive stopping of dog 011, and makes handle 002 can't move to rotatable side, when the adjustment of scooter is carried out to needs, the user at first operates vice handle 61, with the stopper 62 pulling, after stopper 62 breaks away from stopping of dog 011, the user can go to rotatory handle 002 this moment and carry out the adjustment that the scooter expanded and fold condition. The second elastic member 63 keeps the position of the stopper 62 and the stopper 011 from blocking well, so that the position limitation stability is ensured, and the auxiliary handle 61 and the stopper 62 can return to the initial position limitation state by the restoring force of the second elastic member 63.

As an improved specific implementation manner, the handle 002 includes a main support 0021, a holding ring 0022 disposed at one end of the main support 0021, a disposing plate 0023 disposed at the middle of the main support 0021, and a limiting plate 0024 disposed at the other end of the main support 0021, a column 0025 disposed between the disposing plate 0023 and the limiting plate 0024 is provided for the second elastic member 63 and the limiting block 62 to be sleeved, the auxiliary handle 61 is disposed on the disposing plate 0023 in a penetrating manner to slide, and the auxiliary handle 61 forms an auxiliary holding ring 611 at the holding ring 0022.

As shown in fig. 5, the main support 0021 is connected to the rotating shaft 001, a holding ring 0022 for holding is formed at a far end, the holding ring 0022 and the auxiliary holding ring 611 are set to be in a matched shape, so that a user can pass through the holding ring 0022 and hook the thumb of the user at the holding ring 0022, and the other four fingers are held at the auxiliary holding ring 611, and then the auxiliary holding ring 611 can be pulled by applying force, the arrangement plate 0023 is used for the auxiliary handle 61 to pass through and slide, the second elastic member 63 and the limiting block 62 are sleeved on the cylinder 0025 between the arrangement plate 0023 and the limiting block 0024, two ends of the second elastic member 63 respectively abut against the arrangement plate 0023 and the limiting block 62, when the limiting block 62 is pulled, the second elastic member 63 is compressed, and the limiting positions of two ends of the limiting block 62 are limited by the arrangement plate 0023 and the limiting block 0024, so that the structure is stable and ordered.

As a modified specific implementation manner, the inclined plane 012 is provided on the stopper 62 or/and the stopper 011, when the handle 002 is reset, the stopper 62 and the stopper 011 abut against each other and abut against the stopper 62 and the sub-handle 61 through the inclined plane 012, and when the stopper 62 crosses the stopper 011, the restoring force of the second elastic member 63 drives the sub-handle 61 and the stopper 62 to reset, so that the stopper 62 is clamped at the stopper 011.

As shown in fig. 5, the limiting block 62 is provided with an inclined plane 012, and as another embodiment, the stopper 011 or both stoppers are provided with the inclined plane 012, which can both realize the functions; when the limiting block 62 is reset to the initial state from the outside, if no user applies force to pull the auxiliary handle 61 and the limiting block 62 apart, the limiting block 62 is blocked by the back of the block 011 and cannot be reset; the setting up of inclined plane 012 makes user's application of force more light, and when pulling vice handle 61 and stopper 62, cooperation inclined plane 012 removes stopper 62, realizes comparatively laborsaving letting stopper 62 smooth and easy crossing dog 011 back card and returning initial position, the wearing and tearing that can cause of colliding with between the reducible part for a long time.

As a modified embodiment, the link assembly 02 includes a first rod 021 provided at both sides of the rotation shaft 001 and a second rod 022 rotatably connected to the first rod 021, and the second rods 022 at both sides are respectively connected to both ends of the locking member 03.

As shown in fig. 4, 5 and 6, the link assembly 02 can be formed by a first rod 021 and a second rod 022 which are rotatably connected to each other, and the first rod 021 is rotated by the rotary member 00 to swing, so that the displacement of the second rod 022 can be driven, and the locking member 03 can perform corresponding reciprocating motion, and the structure is simple and can be well accommodated in the space of the folding bracket 01; the two sets of second rods 022 connecting the two sets of locking members 03 can share the same set of first rods 021, thereby simplifying the components. Locking piece 03, link assembly 02, rotating member 00 form "day" font, and the rotation of rotating member 00 drives the link assembly 02 action at both ends, can be synchronous stable drive locking piece 03 action at both ends to carry out the structure at both ends and prescribe a limit to, make locking piece 03 and locking groove 5's locking firm, holistic structure is firm, and the transmission is stable.

As a modified embodiment, the second rod 022 includes a middle spiral barrel 0221 and screws 0222 spirally connected to both ends of the spiral barrel 0221, the screws 0222 at both ends are rotatably connected to the first rod 021 and the locking member 03, respectively, and the spiral barrel 0221 and the screws 0222 are rotated to adjust the overall length.

As shown in fig. 4, 5 and 6, the screw barrel 0221 and the screw 0222, which are spirally engaged, can be rotated to finely adjust the overall length of the second rod 022 during use, so as to adjust the locking tightness, and at the same time, can compensate for the dimensional tolerance of the parts during the manufacturing process, so that the product quality is guaranteed.

As a modified embodiment, the locking piece 03 is a cylinder, a waist-shaped hole 013 for sliding on two sides of the locking piece 03 is arranged on the folding bracket 01, and the locking groove 5 is matched with the locking piece 03 in size.

As shown in fig. 4, 5 and 6, the locking member 03 is inserted into the locking groove 5 as a cylinder, and the locking of the structure is well achieved by matching the sizes, and the cylinder can be well abutted against the periphery of the rotating shaft or the peripheral bracket to slide along with the rotation in the process of rotating between the structures after the locking is released, and can be inserted into the locking groove 5 when reaching the locking groove. Folding support 01 goes up waist shape hole 013's setting and supplies the cylinder to carry out reciprocating activity when stable driven, and the preferred can set up the plane and slide the cooperation with waist shape hole 013 inner wall in cylinder cooperation waist shape hole 013 department, and the surface can be add in preferred waist shape hole 013 and the better external member of better smoothness nature and intensity and slide the cooperation with the cylinder, increases the wearability, selects the stainless steel for example, ensures the precision, reduces the fit-up gap.

As a modified specific implementation manner, the folding bracket 01 comprises two bilaterally symmetrical sub-brackets 014, two ends of the two sub-brackets 014 are respectively rotatably connected with the pedal 1 and the stand pipe 2, the middle parts of the two sub-brackets 014 are connected through a connecting shaft 015, the connecting shaft 015 is hollow and is used for accommodating the rotating shaft 001 to rotate therein, and an opening 016 for extending the handle 002 is arranged.

As shown in fig. 4, 5 and 6, the two subframe bodies 014 well accommodate the connecting rod assemblies 02 and are well rotatably connected with the pedals 1 and the vertical pipe 2, and the middle parts of the two subframe bodies are connected through the connecting shaft 015, so that the overall structural strength is ensured; the rotating shaft 001 is sleeved inside the connecting shaft 015 to rotate, the connecting shaft 015 can be provided with an opening 016 in a large range as shown in fig. 6, the handle 002 can rotate in an open space formed by the opening 016, the stop block 011 is arranged on the connecting shaft 015, and the rotation range of the handle 002 can be limited by the side wall of the connecting shaft 015 and the stop block 011.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (9)

1. The utility model provides a folding scooter, includes footboard (1), riser (2) and handlebar (3), handlebar (3) set up in riser (2) upper portion, set up wheel (4) on footboard (1) and riser (2) respectively, carry out folding setting, its characterized in that through folding mechanism (0) between footboard (1) and riser (2): the folding mechanism (0) comprises a folding support (01), a rotating part (00), a connecting rod assembly (02) and two groups of locking parts (03), the folding support (01) is rotatably connected with the pedal (1) and the vertical pipe (2) respectively, the pedal (1) and the vertical pipe (2) are provided with a plurality of locking grooves (5) on the circumference of the rotating position, the rotating part (00) is rotatably arranged on the folding support (01), the locking parts (03) are arranged on the folding support (01) in a sliding manner, and the rotating part (00) and the locking parts (03) are connected and linked through the connecting rod assembly (02); when the rotating piece (00) rotates forwards or reversely, the locking piece (03) is driven to be close to or far away from the locking groove (5).

2. The folding scooter of claim 1, wherein: the rotating piece (00) comprises a rotating shaft (001) rotatably arranged on the folding support (01), a handle (002) connected to the rotating shaft (001), and a first elastic piece (003) connected to the rotating shaft (001) and the folding support (01), when the handle (002) is operated, the rotating shaft (001) is driven to rotate so that the locking piece (03) is separated from the locking groove (5), and the first elastic piece (003) is twisted to store force; the restoring force of the first elastic piece (003) drives the locking piece (03) and the rotating shaft (001) to reset.

3. The folding scooter of claim 2, wherein: the handle (002) is further provided with a limiting assembly (6), the limiting assembly (6) comprises an auxiliary handle (61) arranged on the handle (002) in a sliding mode, a limiting block (62) connected to the auxiliary handle (61) and a second elastic part (63) abutted to the auxiliary handle (61) and the handle (002), a stop block (011) matched with the limiting block (62) is arranged on the folding support (01), the limiting block (62) is clamped at the stop block (011) to limit the handle (002) to be incapable of rotating when the handle (002) is at an initial position, the limiting block (62) is driven to displace to relieve the abutment with the stop block (011) when the auxiliary handle (61) is operated, the handle (002) can rotate, and meanwhile the second elastic part (63) stores force; the restoring force of the second elastic piece (63) drives the auxiliary handle (61) and the limiting block (62) to reset.

4. The folding scooter of claim 3, wherein: handle (002) include main support (0021), set up in the ring (0022) that grips of main support (0021) one end, set up in arrangement board (0023) at main support (0021) middle part and set up in limiting plate (0024) of main support (0021) other end, set up between arrangement board (0023) and limiting plate (0024) cylinder (0025) and supply second elastic component (63) and stopper (62) cover to establish, slide on arranging board (0023) is worn to locate by vice handle (61), and vice handle (61) are holding ring (0022) department and form vice ring (611) of gripping.

5. The folding scooter of claim 4, wherein: be provided with on stopper (62) or/and dog (011) inclined plane (012), when handle (002) resets, offset and open stopper (62) and vice handle (61) through inclined plane (012) by stopper (62) and dog (011), when stopper (62) cross dog (011), the restoring force drive vice handle (61) and stopper (62) of second elastic component (63) reset, make stopper (62) block in dog (011) department.

6. The folding scooter of any one of claims 2-5, wherein: the connecting rod assembly (02) comprises a first rod (021) arranged on two sides of the rotating shaft (001) and a second rod (022) rotationally connected with the first rod (021), and the second rods (022) on two sides are connected to two ends of the locking piece (03) respectively.

7. The folding scooter of claim 6, wherein: the second pole (022) include spiral shell bucket (0221) and the screw rod (0222) of spiral shell bucket (0221) both ends at middle part, and screw rod (0222) at both ends rotate with first pole (021), locking piece (03) respectively and are connected, spiral shell bucket (0221) and screw rod (0222) are through the whole length of rotation regulation.

8. The folding scooter of claim 6, wherein: locking piece (03) are the cylinder, set up waist shape hole (013) that supply locking piece (03) both sides to slide on folding support (01), the size looks adaptation of locking groove (5) and locking piece (03).

9. The folding scooter of any one of claims 2-5, wherein: folding support (01) include two sub-support bodies (014) of bilateral symmetry, and the both ends of two sub-support bodies (014) are connected with footboard (1) and riser (2) are rotatable respectively, and the middle part of two sub-support bodies (014) is connected through a connecting axle (015), connecting axle (015) cavity is used for holding pivot (001) and is rotatory wherein to offer and supply handle (002) to stretch out opening (016) of activity.

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