Folding device and portable vehicle applying same

Abstract

The utility model provides a folding device and a portable vehicle applying the folding device, the folding device comprises a first folding seat, a second folding seat and a locking handle, the first folding seat is provided with a protruding part with a first limiting structure and a clamping notch; the third rotating shaft is mounted on the inner side of the locking handle; the adjusting piece is provided with a second limiting structure and is connected to the third rotating shaft; the first reset mechanism is mounted on the third rotating shaft and used for enabling the second limiting structure to be matched with the first limiting structure; the rotary lock catch is provided with a clamping hasp and an abutting part and is arranged on the second rotating shaft; the second reset mechanism is connected between the second rotating shaft and the rotating lock catch and used for enabling the clamping hasp to be matched with the clamping notch; when the first folding seat and the second folding seat are buckled and the locking handle is close to the first folding seat, the second limiting structure and the first limiting structure are matched to lock the folding device; and when the locking handle is turned over to abut against and press the abutting part, the second limiting structure is separated from the first limiting structure, and the clamping hasp is separated from the clamping notch, so that the folding device is unlocked.

Description

Technical Field

[0001] The utility model relates to the technical field of portable vehicle manufacturing, in particular to a folding device and a portable vehicle using the folding device. Background Art

[0002] Today, the world is increasingly advocating energy conservation and emission reduction, and my country is a well-deserved bicycle and electric vehicle power country, with various bicycles, electric vehicles, and scooters widely used. Among them, folding bicycles have become a very important type of bicycles, electric vehicles, and scooters because of their convenience in carrying and space saving.

[0003] In the existing folding bicycles, the upper and lower joints are usually provided with double locking devices, wherein the first locking device is usually a movable lock buckle installed on the locking handle and a fixed clamping column arranged on the upper joint tube body, and the second locking device is usually an adjustment structure arranged on the inner side of the locking handle and a positioning structure arranged on the lower joint, and the double locking of the upper and lower joints when they are buckled and docked is achieved by cooperating with the movable lock buckle and the fixed clamping column, the adjustment structure and the positioning structure.

[0004] However, the first locking device of this traditional double locking device only locks the locking handle by the active lock buckle and the fixed clamping column when the locking handle is close to the tube body of the upper joint. The locking force is limited, and the active lock buckle and the fixed clamping column may be unhooked due to external impact, causing the first locking to fail. Once the first locking fails, only the second locking formed by the adjustment structure and the positioning structure between the upper and lower joints remains. However, in order to make the adjustment structure automatically adjust the alignment with the positioning structure when the locking handle is close to the tube body, after the first locking fails, the second locking force formed by the adjustment structure and the positioning structure is also limited. At this time, the folding bicycle is prone to failure of the second locking due to external impact or accidental touch by the user, which leads to the unlocking of the upper and lower joints. If the user is riding on the seat cushion at the top of the tube body at this time, it is easy to cause safety hazards. Utility Model Content

[0005] The utility model provides a folding device and a folding bicycle using the same, so as to solve the technical problems that the traditional upper and lower joint double locking structure used in the prior art folding bicycle has insufficient locking force and is prone to potential safety hazards when riding.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is:

[0007] The utility model provides a folding device, comprising a first folding seat and a second folding seat which are hinged to each other on one side, the second folding seat is hinged to a locking handle through a second rotating shaft on the other side opposite to the hinged side of the first folding seat, the first folding seat is provided with a protrusion on the same side facing the second rotating shaft, the top of the protrusion is provided with a first limiting structure, and the bottom of the protrusion is provided with a clamping notch; the folding device also includes:

[0008] A third rotating shaft is rotatably mounted on the inner side of the locking handle;

[0009] An adjusting member, one end of which is connected to the third rotating shaft, and the other end of which is provided with a second limiting structure matching the first limiting structure;

[0010] A first reset mechanism is installed on the third rotating shaft and is used to make the second limiting structure fit closely with the first limiting structure;

[0011] A rotary lock buckle is rotatably mounted on the second rotating shaft and is located on the inner side of the locking handle, a snap-fit ​​buckle matching the snap-fit ​​notch is provided on the top of the rotary lock buckle, and an abutment portion matching the bottom of the locking handle near the second rotating shaft is provided on the bottom of the rotary lock buckle;

[0012] A second reset mechanism is connected between the second rotating shaft and the rotating lock buckle, and is used to make the snap buckle fit snugly with the snap notch;

[0013] When the first folding seat is buckled with the second folding seat and the locking handle is close to the first folding seat, the second limiting structure cooperates with the first limiting structure to lock the first folding seat with the second folding seat;

[0014] When the locking handle is flipped away from the first folding seat until the bottom of the locking handle abuts and presses down the abutting portion, the second limiting structure and the first limiting structure, the snap buckle and the snap notch are successively disengaged to unlock the first folding seat and the second folding seat.

[0015] Preferably, a snap-in hole extending close to the first folding seat is provided at the end of the protrusion away from the first folding seat, and a transition step is provided at the bottom of the end of the protrusion. The transition step connects the end of the snap-in hole away from the first folding seat and the end end face of the protrusion, and the snap-in hole and the transition step constitute a snap-in notch.

[0016] Preferably, a snap-in groove is provided at the bottom of the protrusion, and the end of the snap-in groove away from the first folding seat passes through to the end end surface of the protrusion away from the first folding seat; a snap-in pin is connected between a pair of inner side walls of the snap-in groove, and the snap-in groove and the snap-in pin constitute a snap-in notch.

[0017] Preferably, the second limiting structure is a limiting recess, the first limiting structure is a limiting protrusion matching the limiting recess, a mounting hole is provided on the top of the protrusion, and the limiting protrusion includes:

[0018] The boss part and the connecting part connected to the bottom of the boss part, the shape of the boss part matches the shape of the limiting recess, the shape of the connecting part matches the shape of the mounting hole, and the limiting protrusion is installed on the top of the protrusion through the connecting part and the mounting hole.

[0019] Furthermore, the folding device also includes:

[0020] A tube body, mounted on the top of the first folding seat;

[0021] A movable lock buckle, movably connected to the locking handle;

[0022] A fixed clamping block is installed on a side of the tube body facing the second rotating shaft;

[0023] A third reset mechanism is connected between the movable lock buckle and the locking handle, and is used to make the movable lock buckle fit closely with the fixed block;

[0024] When the first folding seat is buckled with the second folding seat and the locking handle is close to the tube body, the movable lock buckle is buckled with the fixed clamping block; when the movable lock buckle is pulled away from the fixed clamping block, the movable lock buckle is separated from the fixed clamping block.

[0025] Preferably, the movable lock is a movable sliding button, and the movable sliding button includes:

[0026] A first slider and a second slider are arranged at an interval;

[0027] A connecting member connected between the first slider and the second slider;

[0028] A raised wrench is arranged on a side of the first slider away from the second slider;

[0029] A limit buckle, arranged on a side of the second slider away from the first slider;

[0030] A slide groove matching the first slider is provided on the outer side of the locking handle, and a clearance groove penetrating the locking handle and matching the connecting piece is provided at the bottom of the slide groove;

[0031] The third reset mechanism is connected between the connecting piece and the clearance slot;

[0032] A positioning slot matching the limit buckle is provided on the top of the fixed card block;

[0033] The connecting piece is inserted into the clearance groove, the first slider can be movably abutted against the slide groove, and the second slider can be movably abutted against the inner side of the clearance groove passing through the locking handle, so that the movable slide button can be movably connected to the locking handle;

[0034] When the first folding seat is buckled with the second folding seat and the locking handle is close to the tube body, the limit buckle is buckled with the positioning slot; when the movable sliding button is pushed away from the positioning slot, the limit buckle is separated from the positioning slot.

[0035] Preferably, the first reset mechanism is a first torsion spring sleeved on the third rotating shaft, one end of the first torsion spring is wound around the adjusting piece, and the other end of the first torsion spring abuts against the inner wall surface of the locking handle, so that the adjusting piece forms an angle with the axial direction of the locking handle when the second limiting structure and the first limiting structure are not in place.

[0036] Preferably, the second reset mechanism is a second torsion spring sleeved on the second rotating shaft, one end of the second torsion spring is overlapped with the snap buckle, and the other end of the second torsion spring is abutted against the second folding seat.

[0037] The utility model also provides a portable vehicle, comprising a base and the above-mentioned folding device, wherein the second folding seat is installed on the base.

[0038] Preferably, the portable vehicle is a bicycle, a scooter, an electric vehicle, a folding vehicle or a wheelchair.

[0039] Compared with the prior art, the utility model has the following beneficial effects:

[0040] The folding device provided by the utility model has a first folding seat and a second folding seat that are buckled together and a locking handle that is close to the first folding seat, and the second limiting structure cooperates with the first limiting structure as a first locking of the first folding seat and the second folding seat, and at the same time, the snap buckle and the snap notch cooperate as a second locking of the first folding seat and the second folding seat, and the first folding seat and the second folding seat are locked in a double locking manner, thereby improving the safety of the folding device when the user is riding. When the locking handle is flipped away from the first folding seat until the bottom of the locking handle abuts and the abutment portion is pressed down, the second limiting structure and the first limiting structure, the snap buckle and the snap notch are successively disengaged to unlock the first folding seat and the second folding seat, and the use is simple and convenient. In addition, the folding device can further adopt triple locking: when the first folding seat is buckled with the second folding seat and the locking handle is close to the tube body, the movable lock buckle is buckled with the fixed card block, so that on the basis of the above-mentioned double locking, the third lock of the first folding seat and the second folding seat is formed by the cooperation of the movable lock buckle and the fixed card block, thereby further improving the safety and stability of the folding device when the user rides; when the movable lock buckle is pulled away from the fixed card block, the movable lock buckle disengages from the fixed card block, so that the third lock of the first folding seat and the second folding seat is unlocked, which is also easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution proposed by the utility model, it is described in detail below in combination with the embodiments and drawings. It should be understood that the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, these drawings can be changed under the concept of the utility model.

[0042] Figure 1 A three-dimensional diagram of the overall assembly structure of the first embodiment of the folding device provided by the utility model;

[0043] Figure 2 for Figure 1 A perspective view of the overall exploded structure of the first embodiment of the folding device;

[0044] Figure 3 A front view of the overall assembly structure of the first embodiment of the folding device provided by the utility model;

[0045] Figure 4 for Figure 2 A perspective view of the overall cross-sectional structure of the first embodiment of the folding device;

[0046] Figure 5 A right side view of the overall assembly structure of the first embodiment of the folding device provided by the utility model;

[0047] Figure 6 A left side view of the overall assembly structure of the first embodiment of the folding device provided by the utility model;

[0048] Figure 7 A top view of the overall assembly structure of the first embodiment of the folding device provided by the utility model;

[0049] Figure 8 A bottom view of the overall assembly structure of the first embodiment of the folding device provided by the utility model;

[0050] Fig. 9 A partially exploded structural stereogram of the second embodiment of the folding device provided by the utility model;

[0051] Fig.10 This is a front view of the overall assembly structure of the second embodiment of the folding device provided by the utility model with the locking handle hidden.

[0052] Among them, the main marks of the drawings in the figure are as follows:

[0053] 1. First folding seat; 11. Tube; 111. Fixed block; 1111. Positioning slot; 112. Screw hole; 12. Protrusion; 121. Strip side wall; 122. Top wall; 123. Mounting hole; 13. First position limiting structure; 131. Boss; 1311. First arc surface; 132. Connecting part; 14. Snap-in notch; 141. Snap-in hole; 142. Transition step; 1421. Chamfered slope; 143. Snap-in slot; 144. Snap-in pin; 1441. Nail cap end; 1442. Pin shaft end; 15. First sleeve structure; 16. Mounting boss; 161. Screw fixing hole; 2. Second folding seat; 21. Second sleeve structure; 22. Third sleeve structure; 3. First rotating shaft; 4. , second rotating shaft; 5, locking handle; 51, fourth shaft sleeve structure; 52, sliding groove; 521, giving way groove; 6, third rotating shaft; 61, first stud through hole; 611, fixing screw; 7, adjusting member; 71, stud end; 72, nut end; 721, second limiting structure; 7211, second arc surface; 73, first reset mechanism; 8, rotating lock; 81, snap-fit ​​buckle; 811, guiding inclined surface; 82, abutment part; 83, second reset mechanism; 831, annular sleeve part; 832, U-shaped connecting part; 833, L-shaped snap-fit ​​part; 9, movable lock; 91, first slider; 911, raised wrench; 92, second slider; 921, limiting buckle; 93, connecting member; 931, abutment groove. DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-8 And embodiments, the utility model is further described in detail.

[0055] Please also read Figure 1-6 The folding device provided by the utility model includes a first folding seat 1 and a second folding seat 2 which are hinged to each other on one side, and the second folding seat 2 is hinged to the bottom of the locking handle 5 through a second rotating shaft 4 on the other side opposite to the hinged first folding seat 1; when assembled, the first folding seat 1 is on the top and the second folding seat 2 is on the bottom, and the top surface of the second folding seat 2 is arranged opposite to the bottom surface of the first folding seat 1, and the first folding seat 1 can be turned up and down around the first rotating shaft 3 above the second folding seat 2 to approach or move away from the second folding seat 2 to achieve the buckling or opening action between the first folding seat 1 and the second folding seat 2; the first folding seat 1 and the second folding seat 2 are provided with a protrusion 12 on the side opposite to the first rotating shaft 3, the top of the protrusion 12 is provided with a first limiting structure 13, and the bottom of the protrusion 12 is provided with a snap-fitting notch 14;

[0056] The folding device also includes:

[0057] The third rotating shaft 6 is rotatably mounted on the inner side of the locking handle 5; the adjusting member 7, one end of the adjusting member 7 is cross-connected with the third rotating shaft 6, and the other end of the adjusting member 7 is provided with a second limiting structure 721 matching the first limiting structure 13; the first resetting mechanism 73 is mounted on the third rotating shaft 6, and is used to make the second limiting structure 721 fit the first limiting structure 13;

[0058] The rotary lock buckle 8 is rotatably mounted on the second rotating shaft 4 and is located on the inner side of the locking handle 5. The top of the rotary lock buckle 8 is provided with a snap-on buckle 81 matching the snap-on notch 14, and the bottom of the rotary lock buckle 8 is provided with an abutment portion 82 matching the bottom of the locking handle 5 close to the second rotating shaft 4; the second reset mechanism 83 is connected between the second rotating shaft 4 and the rotary lock buckle 8, and is used to make the snap-on buckle 81 fit the snap-on notch 14;

[0059] When the first folding seat 1 and the second folding seat 2 are buckled together and the locking handle 5 is close to the first folding seat 1, the second limiting structure 721 cooperates with the first limiting structure 13 as the first locking of the first folding seat 1 and the second folding seat 2, and at the same time, the snap buckle 81 and the snap notch 14 cooperate as the second locking of the first folding seat 1 and the second folding seat 2, so that the first folding seat 1 and the second folding seat 2 are locked in a double locking manner, thereby improving the safety of the folding device when the user rides; when the locking handle 5 is pulled away from the first folding seat 1 and flipped until the bottom of the locking handle 5 abuts and presses down the abutting part 82, the second limiting structure 721 and the first limiting structure 13, the snap buckle 81 and the snap notch 14 are successively disengaged to unlock the first folding seat 1 and the second folding seat 2.

[0060] Please also read Figure 1-6 In the first embodiment of the folding device provided by the utility model:

[0061] A snap-in hole 141 extending close to the first folding seat 1 is provided at the end of the protrusion 12 away from the first folding seat 1, and a transition step 142 is provided at the bottom of the end of the protrusion 12. The transition step 142 connects the end of the snap-in hole 141 away from the first folding seat 1 and the end face of the protrusion 12. The snap-in hole 141 and the transition step 142 constitute a snap-in notch 14.

[0062] As a preferred implementation of the first embodiment, the transition step 142 is a chamfered step, the bottom surface of the chamfered step is a chamfered slope 1421 , and a guiding slope 811 matching the chamfered slope 1421 is provided on the top of the snap-fit ​​buckle 81 .

[0063] When the first folding seat 1 and the second folding seat 2 are unlocked and opened to each other, the first folding seat 1 is pulled close to the second folding seat 2 to flip over until the chamfered slope 1421 of the chamfered step (at the bottom end of the protrusion 12) abuts against the guiding slope 811 at the top of the snap buckle 81, and the first folding seat 1 is continued to be pulled close to the second folding seat 2 to flip over, so that the chamfered slope 1421 and the guiding slope 811 are in relative sliding contact until the chamfered slope 1421 slides downward over the guiding slope 811 (that is, it is relatively upwardly disengaged from the chamfered slope 1421 relative to the guiding slope 811). At this time, the chamfered slope 1421 is disengaged from the guiding slope 811, and the first folding seat 1 is continued to be pulled close to the second folding seat 2 to flip over until the snap buckle 81 completely passes over the chamfered step and is snapped into the snap hole 141, so that the snap buckle 81 fits snugly into the snap notch 14 in place.

[0064] As a more preferred implementation of the first embodiment, a curved surface transition is adopted between the two side edges of the transition step 142 and the protrusion 12 .

[0065] As a more preferred implementation of the first embodiment, the junction between the top of the engaging hole 141 and the top of the protruding portion 12 is rounded.

[0066] See also Figure 7 , 8 In the second embodiment of the folding device provided by the utility model:

[0067] A snap-in groove 143 is provided at the bottom of the protrusion 12, and the end of the snap-in groove 143 away from the first folding seat 1 passes through to the end face of the protrusion 12 away from the first folding seat 1; a snap-in pin 144 is connected between a pair of inner side walls of the snap-in groove 143, and the snap-in groove 143 and the snap-in pin 144 constitute the above-mentioned snap-in notch 14.

[0068] As a preferred implementation scheme of Example 2, the protrusion 12 is in the shape of a rectangular parallelepiped, and the protrusion 12 forms a pair of strip side walls 121 on both sides of the extension direction of the snap-in groove 143 respectively, and the protrusion 12 forms a top wall 122 connected between the pair of strip side walls 121 on the top side of the extension direction of the snap-in groove 143, and the pair of strip side walls 121 and the top wall 122 constitute a U-shaped structure surrounding the snap-in groove 143.

[0069] As a more preferred implementation of the second embodiment, the junction between the top of the snap-in groove 143 and the top wall 122 is rounded, so that the top wall 122 is arched with a thinner middle and thicker sides connected to a pair of strip side walls 121 .

[0070] As a preferred implementation scheme of Example 2, one of the pair of strip side walls 121 is provided with a countersunk hole (not shown in the figure), and the end of the countersunk hole away from the other strip side wall 121 is provided with a countersunk step (not shown in the figure), and the other of the pair of strip side walls 121 is provided with a pin through-hole (not shown in the figure) coaxially matching the countersunk hole, and the snap-in pin 144 is a countersunk pin, and the nail cap end 1441 of the countersunk pin matching the shape of the countersunk step is fixedly installed in the countersunk step, and the pin shaft end 1442 of the countersunk pin matching the shape of the pin through-hole is penetrated between the countersunk hole and the pin through-hole, and the end of the pin shaft end 1442 away from the nail cap end 1441 is fixedly installed in the pin through-hole, so that the countersunk pin is connected between the inner side walls of the pair of strip side walls 121 of the snap-in groove 143.

[0071] Please also read Figure 1-6 As a common implementation method of the first and second embodiments, the second limiting structure 721 is a limiting recess, the first limiting structure 13 is a limiting protrusion matching the limiting recess, a mounting hole 123 is provided on the top of the protrusion 12, and the first limiting structure 13 (limiting protrusion) includes:

[0072] The boss portion 131 and the connecting portion 132 connected to the bottom of the boss portion 131, the outer shape of the boss portion 131 matches the shape of the second limiting structure 721 (limiting recess), the outer shape of the connecting portion 132 matches the shape of the mounting hole 123, and the limiting protrusion is installed on the top of the protrusion 12 through the connecting portion 132 and the mounting hole 123.

[0073] Please also read Figure 1-6 As a preferred implementation scheme common to Example 1 and Example 2, the top of the boss portion 131 of the first limiting structure 13 is a convex first arc surface 1311, and the middle side of the third rotating shaft 6 is provided with a first stud through-hole 61 that penetrates the third rotating shaft 6; the adjusting member 7 is an adjusting stud, one end of the adjusting stud is a stud end 71 cross-connected to the first stud through-hole 61, and the other end of the adjusting stud is a nut end 72, and the end of the nut end 72 away from the stud end 71 is provided with the above-mentioned second limiting structure 721, and the bottom surface of the second limiting structure 721 is a second arc surface 7211 that matches the shape of the first arc surface 1311 and is concave.

[0074] Please also read Figure 1-6 As a preferred implementation of Example 1, the mounting hole 123 passes through the top of the protrusion 12 and is connected to the snap-in hole 141. The connecting portion 132 is inserted into the mounting hole 123, and the end of the connecting portion 132 away from the boss portion 131 extends into the snap-in hole 141, so that the first limiting structure 13 (limiting protrusion) is installed on the top of the protrusion 12.

[0075] Please also read Figure 1-6As a preferred implementation of Example 2, the mounting hole 123 passes through the top wall 122 of the protrusion 12 and is connected to the snap-in groove 143. The connecting portion 132 is inserted into the mounting hole 123, and the end of the connecting portion 132 away from the boss portion 131 extends into the snap-in groove 143, so that the first limiting structure 13 (limiting protrusion) is installed on the top of the protrusion 12.

[0076] As another implementation method common to the first and second embodiments, the first limiting structure 13 (limiting protrusion) can also be integrally formed with the protruding portion 12 .

[0077] Please also read Figure 1-6 As an implementation method common to Example 1 and Example 2, the bottom side of the first folding seat 1 is a concave first sleeve structure 15, and the top and same side of the second folding seat 2 correspondingly protrude and match the first sleeve structure 15. The first folding seat 1 and the second folding seat 2 are hinged by a first rotating shaft 3 passing through the first sleeve structure 15 and the second sleeve structure 21.

[0078] As another implementation method common to the first and second embodiments (not shown in the figure), one side of the bottom of the first folding seat 1 is a protruding sleeve structure, and the same side of the top of the second folding seat 2 is a correspondingly concave sleeve structure.

[0079] Please also read Figure 1-6 As an implementation mode common to the first and second embodiments, the second folding seat 2 is provided with a third sleeve structure 22 on the other side relative to the first rotating shaft 3, and a fourth sleeve structure 51 matching the third sleeve structure 22 is provided at the bottom of the locking handle 5. The locking handle 5 and the second folding seat 2 are hingedly connected by a second rotating shaft 4 passing through the third sleeve structure 22 and the fourth sleeve structure 51, so that the locking handle 5 can be flipped up and down around the second rotating shaft 4 close to or away from the second folding seat 2, and then the locking handle 5 is flipped away from the first folding seat 1 (i.e., close to the second folding seat 2) until the bottom of the locking handle 5 abuts and presses down the abutting portion 82, so as to unlock the first folding seat 1 and the second folding seat 2 after releasing the double locking through the above-mentioned action process, or the locking handle 5 is flipped close to the first folding seat 1 (i.e., away from the second folding seat 2) until it is close to the first folding seat 1, so as to double lock the first folding seat 1 and the second folding seat 2 through the above-mentioned action process.

[0080] As a preferred implementation mode common to the first embodiment and the second embodiment, the abutting portion 82 is in the shape of a pointed protrusion.

[0081] As another embodiment common to the first and second embodiments, the contact portion 82 is cylindrical.

[0082] Please also read Figure 1-6As a preferred implementation scheme common to Example 1 and Example 2, the second reset mechanism 83 is a second torsion spring sleeved on the second rotating shaft 4, one end of the second torsion spring overlaps the snap buckle 81, and the other end of the second torsion spring abuts against the second folding seat 2.

[0083] Please also read Figure 1-6 As a preferred embodiment of the first and second embodiments, the fourth sleeve structure 51 at the bottom of the locking handle 5 is arranged on the outer side of the third sleeve structure 22 of the second folding seat 2 on the other side relative to the first rotating shaft 3, the rotating lock buckle 8 is rotatably mounted on the second rotating shaft 4 and is located on the inner side of the locking handle 5 and the third sleeve structure 22, the second torsion spring includes a pair of annular sleeve portions 831 arranged with a relative interval on the left and right, and a U-shaped connecting portion 832132 connected between the same ends of the pair of annular sleeve portions 831, and the pair of annular sleeve portions 831 are sleeved. The second rotating shaft 4 is located on the inner side of the third sleeve structure 22, and one end of the second torsion spring is overlapped on the snap-fit ​​buckle 81 through the U-shaped connecting portion 832132. The second torsion spring is respectively provided with a pair of L-shaped snap-fit ​​portions 833 at the same other end corresponding to a pair of annular sleeve portions 831. The relative inner side walls of the third sleeve structure 22 are provided with a pair of fixing holes (not shown in the figure) matching the L-shaped snap-fit ​​portions 833. The other end of the second torsion spring is respectively matched with a pair of fixing holes corresponding to the pair of fixing holes through a pair of L-shaped snap-fit ​​portions 833 to abut against the second folding seat 2.

[0084] Please also read Figure 1-6 As a common implementation of the first and second embodiments, the folding device further includes:

[0085] The tube body 11 is installed on the top of the first folding seat 1;

[0086] The movable lock buckle 9 can be movably connected to the locking handle 5 relative to the locking handle 5; the fixed clamping block 111 is installed on the side of the tube body 11 opposite to the first rotating shaft 3; the third reset mechanism (not shown in the figure) is connected between the movable lock buckle 9 and the locking handle 5, and is used to make the movable lock buckle 9 fit the fixed clamping block 111;

[0087] When the first folding seat 1 is buckled with the second folding seat 2 and the locking handle 5 is close to the tube body 11, the movable lock buckle 9 is buckled with the fixed block 111, so that on the basis of the above-mentioned double locking, the third locking of the first folding seat 1 and the second folding seat 2 is formed by the cooperation of the movable lock buckle 9 and the fixed block 111, thereby further improving the safety and stability of the folding device when the user is riding; when the movable lock buckle 9 is pulled away from the fixed block 111, the movable lock buckle 9 is disengaged from the fixed block 111, so that the above-mentioned third locking of the first folding seat 1 and the second folding seat 2 is unlocked.

[0088] Please also read Figure 1-6As a preferred implementation scheme common to Example 1 and Example 2, a mounting boss 16 is provided on the top of the first folding seat 1, a screw fixing hole 161 is provided on the side of the mounting boss 16, and a screw through-hole 112 matching the screw fixing hole 161 is provided on the tube wall at the bottom end of the tube body 11. The bottom end of the tube body 11 is fixedly installed on the outer side of the mounting boss 16 by screws passing through the corresponding screw through-holes 112 and the screw fixing holes 161, so that the tube body 11 is fixedly installed on the top of the first folding seat 1.

[0089] Please also read Figure 1-6 As a preferred implementation method common to the first and second embodiments, the movable lock buckle 9 is a movable slide button, and the movable slide button includes:

[0090] A first slider 91 and a second slider 92 are arranged at intervals; a connecting member 93 is connected between the first slider 91 and the second slider 92; a protruding wrench 911 is arranged on a side of the first slider 91 away from the second slider 92; a limiting buckle 921 is arranged on a side of the second slider 92 away from the first slider 91;

[0091] The outer side of the locking handle 5 is provided with a slide groove 52 matching the first slider 91, and the bottom of the slide groove 52 is provided with a clearance groove 521 that penetrates the locking handle 5 and matches the connecting member 93; the third reset mechanism is connected between the connecting member 93 and the clearance groove 521; the top of the fixed card block 111 is provided with a positioning card groove 1111 matching the limit buckle 921;

[0092] The connecting member 93 is inserted into the clearance groove 521, the first slider 91 is movably abutted against the slide groove 52, and the second slider 92 is movably abutted against the inner side of the clearance groove 521 passing through the locking handle 5, so that the movable slide button is movably connected to the locking handle 5;

[0093] When the first folding seat 1 is buckled with the second folding seat 2 and the locking handle 5 is close to the tube body 11, the limit buckle 921 is buckled with the positioning slot 1111; when the protruding wrench 911 is pulled away from the positioning slot 1111, the first sliding block 91 is synchronously driven to slide along the sliding slot 52 away from the positioning slot 1111, and at the same time, the second sliding block 92 synchronously slides away from the positioning slot 1111 along the giving way slot 521 passing through the inner side of the locking handle 5, and at the same time, the connecting member 93 moves away from the positioning slot 1111 in the giving way slot 521 along with the first sliding block 91 and the second sliding block 92, so that the movable sliding button moves away from the positioning slot 1111 until the limit The buckle 921 disengages from the positioning slot 1111 to unlock the third lock of the first folding seat 1 and the second folding seat 2. At this time, the locking handle 5 can continue to be turned around the second rotating shaft 4 until the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion) are separated and the snap buckle 81 and the snap notch 14 are successively disengaged, thereby successively realizing the second and first unlocking of the locking handle 5 of the first folding seat 1 and the second folding seat 2 in the locked state. At this time, the first folding seat 1 can be flipped outward around the first rotating shaft 3 relative to the second folding seat 2, so that the two are completely unlocked from the locked state and converted into an open folding / storage state.

[0094] Please also read Figure 1-6 As a better implementation method common to Example 1 and Example 2, an abutment groove 931 is provided at the top of the connecting member 93, and the third reset mechanism is a spring, one end of the spring abuts against the inner surface of the yielding groove 521, and the other end of the spring abuts in the abutment groove 931.

[0095] As a more preferred implementation method common to the first and second embodiments, the third reset mechanism may also be a spring column.

[0096] As other implementation methods common to the first and second embodiments (not shown in the figure), the fixed clamping block 111 is a fixed clamping column, and the end of the fixed clamping column away from the tube body 11 is connected to a step member that gradually shrinks radially outward; the movable lock buckle 9 is a movable lever button, and the movable lever button is connected to the inner side of the locking handle 5 through a fixed stud. When the first folding seat 1 is buckled with the second folding seat 2 and the locking handle 5 gradually approaches the tube body 11, the end of the movable lever button located on the inner side of the locking handle 5 slides along the side of the step member until the end of the movable lever button located on the inner side of the locking handle 5 is buckled with the back side of the step member;

[0097] A notch groove for placing the movable knob is provided on the cavity wall of the locking handle 5, and a mounting hole 123 with an internal thread for mounting a fixed stud is provided in the notch groove, and a blind hole for fixing a reset torsion spring is provided next to the mounting hole 123. The fixed stud passes through the through hole on the movable knob and is connected to the mounting hole 123. The reset torsion spring is sleeved between the fixed stud and the inner wall of the mounting hole 123. One end of the reset torsion spring passes through the through hole and abuts against the mounting groove next to the through hole, and the other end of the reset torsion spring abuts against the blind hole. When the end of the movable pull button located on the outside of the locking handle 5 is pulled, the end of the movable pull button located on the inside of the locking handle 5 is separated from the back of the step member. At this time, the locking handle 5 can continue to be pulled to rotate around the second rotating shaft 4 until the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion) are separated, thereby unlocking the locking handle 5. The first folding seat 1 and the second folding seat 2 are in a fastened state. At this time, the first folding seat 1 can be flipped outward around the first rotating shaft 3 relative to the second folding seat 2, so that the two are converted from the fastened state to an open folding / storage state; just release the end of the movable pull button located on the outside of the locking handle 5, and the movable pull button will automatically reset under the action of the reset torsion spring.

[0098] As a common implementation of the first and second embodiments, the fixing block 111 is fixedly installed on the outside of the tube body 11 by screws, or the fixing block 111 can also be integrally formed with the tube body 11 .

[0099] Please also read Figure 1-6 As a common implementation method of Example 1 and Example 2, the first reset mechanism 73 is a first torsion spring sleeved on the third rotating shaft 6, one end of the first torsion spring is wound around the adjusting member 7 (adjusting stud), and the other end of the first torsion spring abuts against the inner wall surface of the locking handle 5, so that when the adjusting member 7 (adjusting stud) is not in place in the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion), the adjusting member 7 (adjusting stud) and the axial direction of the locking handle 5 maintain an initial angle, which is convenient for guiding the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion) to contact and slide into position in the process of turning the locking handle 5 close to the tube body 11 until the two are fully aligned and fit tightly.

[0100] Please also read Figure 1-6As a preferred implementation mode common to the first and second embodiments, the main body of the locking handle 5 is a semi-shell structure, the inner side of which is a groove-shaped cavity. The two ends of the third rotating shaft 6 are rotatably connected to a pair of cavity inner walls of the locking handle 5. The side of the third rotating shaft 6 is provided with the above-mentioned first stud through-hole 61 perpendicular to its axial direction. One end of the third rotating shaft 6 is provided with a second stud through-hole (not shown in the figure) that passes through the first stud through-hole 61. One end (stud end 71) of the adjusting member 7 (adjusting stud) is cross-connected to the third rotating shaft 6 by threaded cooperation with the first stud through-hole 61. During assembly, the second limiting structure 721 (limiting recess) of the other end of the adjusting member 7 (adjusting stud) points to the first folding seat 1; after the fixing screw 611 is passed through the corresponding hole position of the cavity inner wall on one side of the locking handle 5 and the second stud through-hole in sequence, the fixing screw 611 presses the stud end 71 of the adjusting member 7 (adjusting stud) against the first stud through-hole 61, so that the adjusting member 7 (adjusting stud) is tightly cross-connected to the third rotating shaft 6.

[0101] When the first folding seat 1 is buckled with the second folding seat 2 and the locking handle 5 gradually approaches the tube body 11, the second limiting structure 721 (limiting recess) of the adjusting member 7 (adjusting stud) conflicts with the first limiting structure 13 (limiting protrusion) at the top of the protruding portion 12 of the first folding seat 1. In the process of the locking handle 5 approaching the tube body 11, under the compression and buffering action of the first reset mechanism 73 (first torsion spring), the contact angle between the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion) on the adjusting member 7 (adjusting stud) gradually changes as the locking handle 5 approaches the tube body 11, so that the third rotating shaft 6 is driven by the adjusting member 7 (adjusting stud) to rotate until the locking handle 5 is close to the tube body 11, and the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion) are in contact with each other. The third rotating shaft 6 and the first limiting structure 13 (limiting protrusion) are also completely in close contact and produce an interference fit; at this time, the angle between the line connecting the third rotating shaft 6 and the first limiting structure 13 (limiting protrusion) and the line connecting the first limiting structure 13 (limiting protrusion) and the second rotating shaft 4 is less than 180 degrees. The third rotating shaft 6 is biased towards the tube body 11 compared to the position where the above four are connected in a line, so that the locking handle 5 is subjected to a locking force toward the tube body 11 when the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion) are locked in cooperation, and the locking effect of the second limiting structure 721 (limiting recess) and the first limiting structure 13 (limiting protrusion) is more secure, thereby realizing the locking of the adjusting member 7 (adjusting stud), the second limiting structure 721 (limiting recess) and the locking handle 5 with the first limiting structure 13 (limiting protrusion) and the first folding seat 1.

[0102] The utility model also provides a portable vehicle (not shown in the figure), comprising a base and the above-mentioned folding device, wherein the second folding seat 2 is installed on the base.

[0103] In one embodiment, the portable vehicle further comprises a seat cushion, which is mounted on the top of the tube body 11 on the top of the first folding seat 1 .

[0104] In another embodiment, the portable vehicle further comprises a handlebar, which is mounted on the top of the tube body 11 on the top of the first folding seat 1 .

[0105] As a preferred embodiment, the portable vehicle is a bicycle, a scooter, an electric vehicle, a folding vehicle or a wheelchair.

[0106] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding device, comprising a first folding seat and a second folding seat hinged to each other on one side, wherein the second folding seat is hinged to a locking handle via a second rotating shaft at the hinge position with the first folding seat on the other side, characterized in that: The first folding seat is provided with a protrusion on the same side facing the second rotating shaft, the top of the protrusion is provided with a first limiting structure, and the bottom of the protrusion is provided with a clamping notch; the folding device also includes: a third rotating shaft rotatably mounted on the inner side of the locking handle; an adjusting member, one end of which is connected to the third rotating shaft, and the other end of which is provided with a second limiting structure matching the first limiting structure; A first resetting mechanism, mounted on the third rotating shaft, for making the second limiting structure fit closely with the first limiting structure; A rotary lock buckle is rotatably mounted on the second rotating shaft and is located on the inner side of the locking handle, wherein the top of the rotary lock buckle is provided with a snap-fit ​​buckle matching the snap-fit ​​notch, and the bottom of the rotary lock buckle is provided with an abutment portion matching the bottom of the locking handle close to the second rotating shaft; A second reset mechanism is connected between the second rotating shaft and the rotating lock buckle, and is used to make the snap buckle fit snugly with the snap notch; When the first folding seat is buckled with the second folding seat and the locking handle is close to the first folding seat, the second limiting structure cooperates with the first limiting structure to lock the first folding seat with the second folding seat; When the locking handle is flipped away from the first folding seat until the bottom of the locking handle abuts and presses down the abutting portion, the second limiting structure and the first limiting structure, the snap buckle and the snap notch are successively disengaged to unlock the first folding seat and the second folding seat.

2. The folding device according to claim 1, characterized in that: The end of the protrusion away from the first folding seat is provided with a snap-in hole extending close to the first folding seat, and the bottom of the end of the protrusion is provided with a transition step, which connects the end of the snap-in hole away from the first folding seat and the end end face of the protrusion, and the snap-in hole and the transition step constitute the snap-in notch.

3. The folding device according to claim 1, characterized in that: A snap-in groove is provided at the bottom of the protrusion, and the end of the snap-in groove away from the first folding seat passes through to the end face of the protrusion away from the first folding seat; a snap-in pin is connected between a pair of inner side walls of the snap-in groove, and the snap-in groove and the snap-in pin constitute the snap-in notch.

4. The folding device according to claim 1, characterized in that: The second limiting structure is a limiting recess, the first limiting structure is a limiting protrusion matching the limiting recess, a mounting hole is provided on the top of the protrusion, and the limiting protrusion includes: The boss portion and the connecting portion connected to the bottom of the boss portion, the shape of the boss portion matches the shape of the limiting recess, the shape of the connecting portion matches the shape of the mounting hole, and the limiting protrusion is installed on the top of the protrusion through the connecting portion and the mounting hole.

5. The folding device according to any one of claims 1 to 4, characterized in that: Also includes: A tube body, mounted on the top of the first folding seat; A movable lock buckle, movably connected to the locking handle; A fixed block is installed on a side of the tube body facing the second rotating shaft; A third reset mechanism, connected between the movable lock buckle and the locking handle, and used to make the movable lock buckle fit closely with the fixed block; When the first folding seat is buckled with the second folding seat and the locking handle is close to the tube body, the movable lock buckle is buckled with the fixed block; when the movable lock buckle is pulled away from the fixed block, the movable lock buckle is separated from the fixed block.

6. The folding device according to claim 5, characterized in that: The movable lock is a movable sliding button, and the movable sliding button includes: A first slider and a second slider are arranged at an interval; A connecting member connected between the first slider and the second slider; A raised wrench is arranged on a side of the first slider away from the second slider; A limit buckle, arranged on a side of the second slider away from the first slider; The outer side surface of the locking handle is provided with a slide groove matching the first slider, and the bottom of the slide groove is provided with a clearance groove penetrating the locking handle and matching the connecting piece; The third reset mechanism is connected between the connecting member and the clearance slot; The top of the fixed card block is provided with a positioning card slot matching the limit buckle; The connecting piece is inserted into the clearance groove, the first slider can be movably abutted against the slide groove, and the second slider can be movably abutted against the inner side of the clearance groove passing through the locking handle, so that the movable slide button can be movably connected to the locking handle; When the first folding seat is buckled with the second folding seat and the locking handle is close to the tube body, the limiting buckle is buckled with the positioning slot; when the movable sliding button is pushed away from the positioning slot, the limiting buckle is separated from the positioning slot.

7. The folding device according to any one of claims 1 to 4, characterized in that: The first reset mechanism is a first torsion spring sleeved on the third rotating shaft, one end of the first torsion spring is wound around the adjusting member, and the other end of the first torsion spring abuts against the inner wall surface of the locking handle, so that the adjusting member forms an angle with the axial direction of the locking handle when the second limiting structure and the first limiting structure are not in place.

8. The folding device according to any one of claims 1 to 4, characterized in that: The second reset mechanism is a second torsion spring sleeved on the second rotating shaft, one end of the second torsion spring is overlapped with the clamping buckle, and the other end of the second torsion spring is abutted against the second folding seat.

9. A portable vehicle, comprising a base, characterized in that: It also includes the folding device according to any one of claims 1 to 8, wherein the second folding seat is installed on the base.

10. The portable vehicle according to claim 9, characterized in that: The portable vehicle is a bicycle, a scooter, an electric vehicle, a folding vehicle or a wheelchair.

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