CN113060231A

CN113060231A - Folding device with multiple protection functions and folding method

Info

Publication number: CN113060231A
Application number: CN202110239764.6A
Authority: CN
Inventors: 赵炜炜
Original assignee: Shanghai Ximo Electric Technology Co ltd
Current assignee: Shanghai Ximo Electric Technology Co ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-07-02
Anticipated expiration: 2041-03-04
Also published as: CN113060231B

Abstract

The invention relates to the technical field of electric scooters, in particular to a folding device with multiple protections and a folding method. The folding mechanism of the electric scooter is novel in structure and reasonable in design, the folding mechanism of the electric scooter is divided into five parts according to functions, all the mechanisms are reasonably and tightly matched, and the folding mechanism of the electric scooter is provided with three locking protection mechanisms. And has advantages such as easy and simple to handle, the practicality is strong, factor of safety is high, folding simple and convenient, has solved many, the poor stability scheduling problem of traditional scray folding step.

Description

Folding device with multiple protection functions and folding method

Technical Field

The invention relates to the technical field of electric scooters, in particular to a folding device with multiple protection functions and a folding method.

Background

In recent years, the rapid popularization of electric scooters brings great convenience to people and brings convenience to short-distance green trips of people. The electric skateboard is based on a traditional manpower skateboard and is provided with an electric-driven vehicle. The advantages of simple operation, easy folding, small volume and the like are obtained, and the young people enjoy and pursue the method.

Meanwhile, with the long-term use of the electric scooter, a plurality of design defects are exposed, the existing electric scooter is small in size, and the size of the scooter is reduced by adopting a standing folding mode; and in order to make easy operation increase customer experience feel, increased during the design of scooter scray and controlled experience and neglected the security performance, caused current scooter scray intensity low, poor stability, factor of safety low scheduling problem. Therefore, a safe, reliable, simple and understandable electric skateboard folder needs to be designed to meet the market demand.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a folding device with multiple protections and a folding method, which are safe, reliable and convenient to operate.

In order to achieve the purpose, the folding device with multiple protections comprises a vertical pipe assembly, a folding base assembly and a handle assembly, wherein the vertical pipe assembly and the handle assembly can rotate relative to the folding base assembly, a first protection part is arranged in the vertical pipe assembly, the first protection part is connected with the vertical pipe assembly through a first elastic piece, so that the relative position between the first protection part and the vertical pipe assembly can be changed, a first matching part is arranged on the folding base assembly corresponding to the first protection part, and the first protection part can be matched with the first matching part under the action of gravity to realize locking; the handle assembly is provided with a first protection part corresponding to the first protection part, and the handle assembly is provided with a first matching part corresponding to the first protection part; the handle assembly is further connected with a third protection portion, the folding base assembly is provided with a third matching portion corresponding to the third protection portion, and when the handle assembly rotates to the matching position of the second protection portion and the second matching portion, the third protection portion can be matched with the third matching portion to achieve locking.

The folding device also has the following preferable technical scheme:

the utility model discloses a folding base subassembly, including riser subassembly, folding base subassembly, bolt subassembly, including the bolt slider, the bolt slider be equipped with bolt slider, bolt handle and bolt elastic component, the bolt slider pass through bolt elastic component connect in the riser subassembly, the bolt handle with the bolt slider link to each other, the riser subassembly be equipped with first handle guide way, the bolt handle pass through first handle guide way extend to the riser subassembly outside, just the bolt handle can follow first handle guide way motion, folding base subassembly on correspond to the bolt slider be equipped with the mating holes, the bolt slider can under the effect of gravity with mating parts cooperate.

The plug pin component also comprises a plug pin base, the plug pin base is fixed in the vertical pipe component, the plug pin sliding block is arranged in the plug pin base, and a second handle guide groove is formed in the surface of the plug pin base corresponding to the first handle guide groove.

The handle subassembly include handle main part and button, the handle main part on be equipped with the cooperation concave point, the button correspond to the cooperation concave point be equipped with the round hole, the button can for the handle main part move in order to change the relative position between round hole and the cooperation concave point, the round hole with the cooperation concave point cooperation form second cooperation portion.

The handle main body is internally provided with a positioning part for positioning the button.

The outer end of the second protection part is exposed out of the vertical pipe assembly and is used for being matched with the handle assembly, and the part, located in the vertical pipe assembly, of the second protection part is used for being connected with the first elastic piece.

The handle assembly is connected with an eccentric part, and when the handle assembly rotates to the matching position of the second protection part and the second matching part, the eccentric part applies acting force to the third matching part to enable the folding base assembly and the vertical pipe assembly to be clamped tightly.

The invention also relates to a folding method of the folding device with multiple protections, when the folding device is folded and unfolded, the locking of the opposite tube component is realized through the matching of the first protection part and the first matching part, and then the handle component is rotated, so that the further locking of the opposite tube component is realized through the matching of the second protection part and the second matching part and the matching of the third protection part and the third matching part.

The folding method also has the following preferable technical scheme:

in the method, the folding and gathering steps are as follows:

step 1: releasing the first protection part and the first matching part and the second protection part and the second matching part from matching;

step 2: pulling the handle assembly downwards to release the fit of the third protection part and the third matching part;

and step 3: the riser assembly is rotated downwardly for folding.

In the method, the folding and unfolding steps are as follows:

step 1: the vertical pipe assembly is rotated upwards to be vertical to the ground, and the second protection part is matched with the second matching part through gravity;

step 2: the handle assembly is rotated upward and the first protection portion and the first fitting portion, the third protection portion and the third fitting portion are fitted to each other.

Advantageous effects of the invention

Compared with the prior art, the invention has simple and feasible combination structure, simple and understandable folding operation, safety and reliability, and the advantages of: the folding mechanism of the electric scooter is novel in structure and reasonable in design, the folding mechanism of the electric scooter is divided into five parts according to functions, all the mechanisms are reasonably and tightly matched, and the folding mechanism of the electric scooter is provided with three locking protection mechanisms. And have easy and simple to handle, practical strong, factor of safety is high, folding advantage such as simple and convenient, it can bear the static pressure testing of 20kg heavy object 1min and indeformable, solved many, the poor scheduling problem of stability of folding step of traditional scray, provide an electric scooter folding device who possesses multiple protection.

Drawings

Fig. 1 schematically shows the structure of the present invention.

Figure 2 illustrates a modular schematic of the riser assembly of the present invention.

Fig. 3 illustrates a modular schematic of the handle assembly of the present invention.

FIG. 4 illustrates a modular schematic of the latch assembly of the present invention.

FIG. 5 illustrates a modular schematic of the eccentric shaft assembly of the present invention.

Fig. 6 illustrates a modular schematic of the folding base assembly of the present invention.

In the figure: 1. the novel anti-theft handle comprises a vertical pipe assembly 2, a handle assembly 3, a bolt assembly 4, an eccentric shaft assembly 5, a folding base assembly 6, a vertical pipe 7, an M3.8 bolt 8, an M3 positioning screw 9, a folding upper base 10, a bushing 11, a bolt fixing screw 12, a handle body 13, a second spring 14, a button 15, a jackscrew 16, a bolt base 17, a first spring 18, a bolt sliding block 19, a bolt handle 20, a rubber ring 21, an eccentric module 22, an M5 internal six screws 23, a main shaft 24, a positioning jackscrew 25, an L-shaped anti-wear plate 26, an M5 internal six bolts 27, an M4 internal hexagonal bolt 28, an M11 threaded jackscrew 29, a folding base 30 and a dust-proof rubber cover.

Detailed Description

The construction and principles of such a device will be apparent to those skilled in the art from the following further description of the invention taken in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

This embodiment provides a folding device who possesses multiple protection, including riser subassembly 1, folding base subassembly 5 and handle subassembly 2, riser subassembly 1 and handle subassembly 2 can for folding base subassembly 5 rotate riser subassembly 1, folding base subassembly 5 and handle subassembly 2 between be equipped with three sets of protection locking mechanism, the cooperation structure of first protection portion and first cooperation portion, the cooperation structure of second protection portion and second cooperation portion and the cooperation structure of third protection portion and third cooperation portion promptly, realize effective locking to riser subassembly 1 through three sets of protection locking mechanism.

The folding base component 5 is provided with a first matching part corresponding to the first protection part, and the first protection part can be matched with the first matching part under the action of gravity to realize locking.

The riser component 1 on be equipped with the second protection portion, just handle component 2 on correspond to the second protection portion be equipped with the second cooperation portion, handle component 2 rotate to riser component 1 side when the second protection portion can with the cooperation of second cooperation portion in order to realize locking.

The handle assembly 2 is further connected with a third protection portion, the folding base assembly 5 is provided with a third matching portion corresponding to the third protection portion, and when the handle assembly 2 rotates to the matching position of the second protection portion and the second matching portion, the third protection portion can be matched with the third matching portion to achieve locking.

When the locking device is used, firstly, the locking of the opposite tube component 1 is realized through the matching of the first protection part and the first matching part, and then the handle component 2 is rotated, so that the further locking of the opposite tube component 1 is realized through the matching of the second protection part and the second matching part and the matching of the third protection part and the third matching part.

Specifically, the steps of folding and unfolding are as follows:

step 1: the vertical pipe assembly 1 is rotated upwards to be vertical to the ground, and the second protection part is matched with the second matching part through gravity.

Step 2: the handle assembly 2 is rotated upward and the first protection portion and the first fitting portion, the third protection portion and the third fitting portion are fitted to each other.

The folding and furling steps are as follows:

step 1: the first protection portion and the first fitting portion, and the second protection portion and the second fitting portion are disengaged.

Step 2: the handle assembly 2 is pulled down and the engagement of the third protection portion and the third engagement portion is released.

And step 3: the riser assembly 1 is rotated downwardly for folding.

Hereinafter, the folding device of the present invention will be further exemplified with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1, the folding device with multiple protections mainly includes a riser assembly 1, a handle assembly 2, a latch assembly 3, an eccentric shaft assembly 4 and a folding base assembly 5.

Referring to fig. 2, the riser assembly 1 includes a riser 6, M3.8 bolts 7, M3 setscrews 8, a folding upper base 9, a bushing 10, and M4 cross setscrews 11.

Wherein, the vertical pipe 6 is an aluminum round pipe ∅ 46.6.6 mm x 600mm, and one end of the vertical pipe is used for matching with the handlebar, for example, the vertical pipe is fastened with the handlebar through screws; the other end is firstly assembled with the folding upper base 9 by using M3 set screws and then the joint of the two is welded by adopting a welding process.

Two ∅ 12.2.2 axle holes are respectively arranged on two sides of the pipe wall of the folding upper base 9 and are used for realizing the rotary connection among the vertical pipe component 1, the handle component 2 and the folding base component 5 after being connected with the eccentric shaft component 4, and plastic bushings 10 are arranged in the axle round holes to prevent abrasion.

The M3.8 bolt 7 is arranged on the pipe wall of the vertical pipe 30mm above the folding upper base 9 and is an inner six-bolt with the thickness of 40mm, the M3.8 bolt 7 is a second protection part and penetrates through the axis of the vertical pipe 6 and is fixed with the bolt base 16 of the bolt component 3, and after complete assembly, the nut end of the M3.8 bolt 7 is exposed out of the vertical pipe 6 by a distance of 6mm and is used for being matched with a second matching part on the handle component 2 to form a self-locking effect.

∅ 4 threaded holes are left on the same side of the stand pipe 6 and the folding upper base 9 for fixing the bolt assembly 3 on the inner wall of the stand pipe 6 through M4 cross set screws 11.

As shown in fig. 3, the handle assembly 2 includes a handle body 12, a second spring 13, a button 14, and a terminal 15.

The handle body 12 is a die-cast special-shaped fitting, and can be attached to the surface of the vertical pipe 6 after being folded with a slight radian as a whole, two cantilevers are symmetrically arranged on two sides of the handle body 12, and ∅ 6 shaft holes are reserved on the cantilevers and are used for being matched with the shaft hole of the vertical pipe assembly 11 and the shaft hole of the folding base assembly 529 to be connected with the eccentric shaft assembly 4. Two positioning points with a distance of 17mm are arranged on the inner side of the handle main body 12 and used for fixing the stroke of the button 14. A groove is reserved on the left side of the positioning point, and a square hole with the diameter of 19.5 mm/5 mm is formed in the right side of the positioning point. ∅ 9 x 1.3 matching concave points are arranged at the middle positions of the grooves and the square holes and are used for avoiding the M3.8 screw cap 7 of the riser component 11.

The button 14 is a slightly arc-shaped die casting, ∅ 9 circular holes are reserved at the center points of the arcs and are overlapped with matching concave points of the handle main body ∅ 9 x 1.3, and the inner sides of the ∅ 9 circular holes are provided with chamfers to play a role in guiding when the handle is in a folded and closed state. The top end of the left side of the button 14 is provided with an ∅ 3.1.1 × 2mm round hole for installing a ∅ 3 × 5mm second spring 13; ∅ 1.8.8 x 2mm threaded holes are reserved on the side face of the right arc starting point of the button 14 and used for installing M2 x 6mm jackscrews 15. The spring 13 is assembled on the left side of the button 14 and then penetrates through the square hole on the right side of the handle main body 12 and the middle position of the two positioning points, so that the top end of the left side of the button 14 and the spring 13 are installed in the groove on the left side of the handle main body, and the two positioning points, the groove, the square hole and the second spring 13 jointly realize the positioning of the button 14.

At this time, the ∅ 9 round hole on the button and the ∅ 9 × 1.3 mating concave point on the handle are in an eccentric state due to the action of the second spring 13, the M2 × 6mm jackscrew 15 is installed in the ∅ 1.8.8 × 2mm threaded hole after the right side of the button 14 is pressed to form a concentric state between the ∅ 9 round hole on the button 14 and the ∅ 9 × 1.3 mating concave point on the handle, so that the button 14 is fixed inside the handle body 12.

Therefore, when the handle assembly 22 is rotated to a position attached to the side surface of the riser assembly 11, the M3.8 bolt 7 as a second protection portion can drive the button 14 to slightly move to the side surface against the acting force of the second spring 13 to a state that the circular hole and the matching concave point are concentric, and the button 14 is embedded into a position between the circular hole and the matching concave point after penetrating through the circular hole, and then the button 14 is restored to the original position under the action of the second spring 13 to enable the circular hole and the matching concave point not to be in the concentric position any more, so that the M3.8 bolt 7 cannot exit from the current position through the circular hole, and the circular hole and the matching concave point are matched to form the second matching portion.

Specifically, the steps of releasing the engagement of the second protection portion and the second engagement portion and folding and furling are as follows:

step 1: when the folding button 14 is pressed, the ∅ 9 round hole on the button 14 is concentric with the ∅ 9 x 1.3 matching concave point on the handle main body 12, so that the six bolts 7 in the M3.8 of the stand pipe are unlocked, and the folding mechanism is in an unlocked state.

Step 2: the handle body 12 is pulled downward 90 °.

And step 3: the folding can be achieved by rotating the stand pipe 6 downwards by 90 degrees, and the folder is in an open state at the moment.

The steps of folding and unfolding and realizing the matching of the second protection part and the second matching part are as follows:

step 1: the upward 90 rotation restores riser 6 to vertical to the ground.

Step 2: the handle main body 12 is rotated upward by 90 ° until the second protector and the second fitting portion are automatically locked.

The specific process of the step 2 is as follows: the handle body 12 is pushed to enable the M3.8 bolt 7 of the stand pipe 6 to abut against the chamfered bevel edge of the ∅ 9 round hole of the button 14, the second spring 13 is stressed to contract while the M3.8 bolt 7 applies force to the handle body 12, so that the ∅ 9 round hole and the matching concave point are in a concentric state, after the M3.8 bolt 7 passes through the round hole and the second spring 13 stretches out again, the ∅ 9 round hole of the button is eccentric with the M3.8 bolt 7 and the matching concave point, and the M3.8 bolt 7 is clamped by the outer edge of the round hole. At the moment, the folding handle cannot be opened, and the folding mechanism is in a locking state.

As shown in fig. 4, the latch assembly 3 includes a latch base 16, a first spring 17, a latch slider 18, and a latch handle 19, and the latch handle 19 serves as a first protection portion in this embodiment.

After the first spring 17 and the bolt sliding block 18 are arranged in the bolt base 16, the bolt base 16 is fixed on the inner wall of the vertical pipe 6 through the M3.8 bolt 7 and the M3 set screw 8, and the bolt handle 19 is fastened to the threaded hole of the bolt sliding block 18 after the bolt sliding block 18 is pressed to the maximum stroke. A sliding latch handle 19 is capable of moving the latch slide 18 to change its stroke to locked and unlocked states.

The vertical pipe 6 is provided with a first handle guide groove, the bolt handle 19 extends to the outer side of the vertical pipe 6 through the first handle guide groove, the surface of the bolt base 16 is provided with a second handle guide groove corresponding to the first handle guide groove, the bolt handle 19 can move along the first handle guide groove and the second handle guide groove and is limited by the first handle guide groove and the second handle guide groove in movement stroke, when the bolt slider 18 moves to the bottommost part under the action of gravity during locking, at the moment, the bolt handle 19 is also positioned at the bottommost parts of the first handle guide groove and the second handle guide groove, and therefore the bolt slider 18 is fixed.

Referring to fig. 5, the eccentric shaft assembly 4 includes a rubber ring 20, an eccentric module 21, a M5 internal six-bolt 22, a main shaft 23, a positioning jackscrew 24 and an L-shaped wear plate 25.

The main shaft 23 is made of carbon steel, the size of the main shaft is ∅ 12mm × 53mm, a ∅ 3.9.9 through hole is reserved in the center of the main shaft for installing the eccentric module 21, in the embodiment, the main shaft 23 serves as a rotating shaft for achieving rotating connection among the riser component 1, the folding base component 5 and the handle component 2, so that the riser component 1 and the handle component 2 can rotate relative to the folding base component 5, ∅ 5mm × 16.5mm threaded holes are reserved at two ends of the main shaft 23 respectively for assembling a folding mechanism, and a positioning boss is arranged to be matched with a folding handle cantilever for use.

The eccentric module 21 is made of stainless steel with the thickness of 11mm, a through hole with the thickness of ∅ 12mm is formed in the eccentric module, and rubber rings 20 are arranged outside two sides of the through hole to prevent abrasion; the most thin department of eccentric module 21 outer wall is opened has ∅ 3.5.5 screw hole, ∅ 12mm through-hole inner wall corresponds leaves ∅ 3.5.5 screw hole setpoint, adopts location jackscrew 24 to fasten both and accomplish the equipment after main shaft 23 and eccentric module 21 assemble, for preventing eccentric module 21 and folding base 29 wearing and tearing in the folding process, still install L type abrasionproof piece 25 preferably additional, L type abrasionproof piece 25 is located in the folding process between eccentric module 21 and the folding base 29 to eccentric module 21 can not wear and tear folding base 29 with L type abrasionproof piece 25 looks mutual friction.

As shown in fig. 6, the folding base assembly 5 is the core of the whole folding mechanism, and the rest of the components are matched with the folding base assembly 5 to achieve the folding effect. The main body of the folding base component 5 is a folding base 29 and is provided with M5 internal hexagonal fastening screws 26, M4 internal hexagonal bolts 27, M11 threaded jackscrews 28, dust-proof rubber covers 30 and other accessories.

A clamping hole is formed below the folding base 29 and used for being matched with the front fork vertical tube, after the front fork vertical tube is arranged in the clamping hole, the side wall of the base is fastened 26 by adopting M5 internal six bolts; the middle inner cavity of the folding base is communicated with the lower clamping hole, and the vertical tube of the front fork is fixed after the L-shaped anti-abrasion piece 25 is additionally arranged above by adopting an M4 internal six-bolt 27. The eccentric shaft assembly 4 is then secured in the inner cavity and the L-shaped wear plate 25 prevents wear of the folding base body and the eccentric shaft during folding. The M11 screw top thread 28 is installed above the folding base 29 and can be used for adjusting the fit clearance of the upper base 9 and the folding base 29. The upper part of the folding base 29 is matched with the vertical pipe component 1, the middle part is matched with the handle component 2, the inner part is matched with the eccentric shaft component 4, and the lower part is matched with the front fork component. Thereby integrating the components into a complete folding mechanism. Finally, the dustproof rubber cover 30 covers the folding base 29 to prevent dust from entering and influencing the folding effect.

In this embodiment, the eccentric module 21 is used as the third protection part and connected to the handle assembly 2 through the main shaft 23, the M11 screw-thread jackscrew 28 is used as the third matching part, and when the handle assembly 2 is rotated to the matching position of the second protection part and the second matching part, the eccentric module 21 applies upward force to the M11 screw-thread jackscrew 28, so that the folding base assembly 5 is tightly jointed with the vertical pipe assembly 1, and further locking protection is realized. When the handle assembly 2 is rotated out of the engagement position of the second protection portion and the second engagement portion, the eccentric module 21 is also rotated with the handle assembly 2, and the force applied to the M11 screw jack 28 is removed, thereby releasing the locking.

In this embodiment, the folding base 29 is provided with a fitting hole corresponding to the latch slider 18, the latch slider 18 serves as a first protection portion, and the fitting hole serves as a first fitting portion, so that when the latch assembly 3 and the riser assembly 1 fall under the action of gravity, the latch slider 18 can be fitted with the fitting hole, thereby achieving locking. Further, since the latch handle 19 can move along the first handle guide groove and the second handle guide groove, the latch handle 19 can be operated to release the locking of both.

During folding and unfolding, the riser 6 is firstly rotated and lifted, and meanwhile, the bolt sliding block 18 in the bolt assembly 3 avoids the bulge of the folding base 29 under the action of the spring 17 and is inserted into the matching hole above the folding base 29, and the bolt sliding block 18 is completely inserted into the matching hole due to the fact that the self weight of the riser assembly 1 eliminates the gap between the folding base 29 and the folding upper base 9, and therefore first locking protection is formed. The folder can be locked through one-step operation.

The handle assembly 2 is then pulled to a position fully abutting the riser assembly 1 and the button 14 locks the M3.8 bolt 7 under the action of the second spring 13, forming a second locking protection.

At the same time, when the handle assembly 2 is turned to the position of engagement of the second spring 13 and the bolt 7 of M3.8, the eccentric shaft assembly 4 inside the folding base 29 is rotated, and the eccentric module 21 applies an upward force to the screw thread 28 of M11, so that the folding base assembly 5 is tightly attached to the riser assembly 1, and the folding base 29 and the folding upper base 9 are clamped to form a third locking protection.

Therefore, through the second step of operation, further locking is realized, and the three locking protection mechanisms are mutually matched to form a firm folding protection mechanism.

During folding, button 14 is first pressed to unlock M3.8 bolt 7, and then handle assembly 2 is pulled downward to rotate eccentric shaft assembly 4, and eccentric module 21 no longer applies upward force to M11 screw jack 28. Then, the latch handle 19 is pulled upwards to separate the latch slide block 18 from the mating hole, and then all three locking protection mechanisms are unlocked, and finally the riser assembly 1 is pulled to be folded.

Claims

1. A folding device with multiple protections, comprising a riser assembly, a folding base assembly and a handle assembly, said riser assembly and handle assembly being rotatable relative to said folding base assembly, wherein,

the foldable base assembly is provided with a first protection part, the first protection part is connected with the riser assembly through a first elastic piece, so that the relative position between the first protection part and the riser assembly can be changed, a first matching part is arranged on the foldable base assembly corresponding to the first protection part, and the first protection part can be matched with the first matching part under the action of gravity to realize locking;

the handle assembly is provided with a first protection part corresponding to the first protection part, and the handle assembly is provided with a first matching part corresponding to the first protection part;

the handle assembly is further connected with a third protection portion, the folding base assembly is provided with a third matching portion corresponding to the third protection portion, and when the handle assembly rotates to the matching position of the second protection portion and the second matching portion, the third protection portion can be matched with the third matching portion to achieve locking.

2. The folding device with multiple protections as claimed in claim 1, wherein a latch assembly is disposed in the riser assembly, the latch assembly comprises a latch slider, a latch handle and a latch elastic member, the latch slider is connected to the riser assembly through the latch elastic member, the latch handle is connected to the latch slider, the riser assembly is provided with a first handle guide slot, the latch handle extends to the outside of the riser assembly through the first handle guide slot, the latch handle can move along the first handle guide slot, the folding base assembly is provided with a matching hole corresponding to the latch slider, and the latch slider can match with the matching part under the action of gravity.

3. The folding device with multiple protections as claimed in claim 2, wherein said latch assembly further comprises a latch base, said latch base being fixed in said riser assembly, said latch slider being disposed in said latch base, said latch base having a second handle guide groove on a surface thereof corresponding to said first handle guide groove.

4. The folding device with multiple protections of claim 1, wherein said handle assembly includes a handle body and a button, said handle body having a mating recess, said button having a circular hole corresponding to said mating recess, said button being movable relative to said handle body to change the relative position between said circular hole and said mating recess, said circular hole and said mating recess cooperating to form said second engagement portion.

5. The folding device with multiple protections as claimed in claim 4, wherein a positioning portion is provided in said handle body for positioning said push button.

6. The folding device with multiple protections as claimed in claim 4, wherein an outer end of said second protection member is exposed from said riser assembly for engagement with said handle assembly, and a portion of said second protection member located within said riser assembly is adapted to be connected to said first resilient member.

7. The folding device with multiple protections of claim 1, wherein an eccentric portion is attached to the handle assembly, and wherein when the handle assembly is rotated to a position where the second protection portion engages the second engagement portion, the eccentric portion applies a force to the third engagement portion that causes the folding base assembly to clamp the riser assembly.

8. A folding method using the folding device with multiple protections as claimed in claim 1, wherein when the folding device is folded and unfolded, the first protection portion and the first engagement portion are engaged to lock the opposite tube assembly, and then the handle assembly is rotated to further lock the opposite tube assembly by engaging the second protection portion and the second engagement portion and engaging the third protection portion and the third engagement portion.

9. The folding method of claim 8 wherein the folding step comprises the steps of:

and step 3: the riser assembly is rotated downwardly for folding.

10. The folding method of claim 8, wherein the steps of folding and unfolding are as follows: