An eccentric folding structure and a portable vehicle

Abstract

The utility model provides a kind of eccentric folding structure and portable car, eccentric folding structure includes first joint, second joint being hingedly connected up and down, first safety device and second safety device for locking both, first safety device includes second pivot, is installed in second joint one side;Eccentric wheel, is hingedly connected in second pivot;Clamping groove, is located in first joint one side;Limiting piece, is installed in the inside of clamping groove;Rotary clamping hook, including the wheel sleeve part of being connected with eccentric wheel, along wheel sleeve part radial extension, be equipped with the clamping portion of the matching of limiting piece, and telescopic connection in the inner surface of clamping, for adjusting the size of clamping to the adjusting member of snugly matched limiting piece;First reset piece, is set in eccentric wheel and is connected between rotary clamping hook and second joint, for making rotary clamping hook with eccentric wheel overturn reset. First joint and second joint buckle drive limiting piece and clamping and adjusting member cooperate to lock first safety device;Quick-release handle, is connected in eccentric wheel and is located rotary clamping hook outside.

Description

Technical Field

[0001] This utility model relates to the field of folding structure technology, and in particular to an eccentric folding structure and a portable vehicle using the same. Background Technology

[0002] The world is advocating energy conservation and emission reduction, and my country is undoubtedly a major country in bicycles and electric vehicles, with various types of bicycles, electric vehicles, and scooters being widely used. Among them, folding bikes have become a very important type of bicycle, electric vehicle, and scooter due to their advantages of being easy to carry and taking up little space, and they are becoming increasingly popular.

[0003] To address the issue of potential danger to folding bike users in cases of accidental locking when using folding structures with only a single locking capability, existing technologies provide a folding structure with dual locking capabilities. This structure includes a first folding seat and a second folding seat positioned vertically. The first and second folding seats are hinged on one side via a first pivot, and the second folding seat is hinged to a quick-release handle on the opposite side of the first pivot via a second pivot. An eccentric wheel mechanism, serving as a first safety device, is mounted on the second pivot, and a locking mechanism, serving as a second safety device, is mounted on the quick-release handle. A reset mechanism drives the quick-release handle to rotate near the first connector, causing the rotating hook of the eccentric wheel mechanism to rotate upwards until the quick-release handle and rotating hook return to their initial upward-facing state. At this point, engaging the first and second folding seats engages the rotating hook with the positioning structure of the first folding seat, thus locking the first safety device. Finally, locking the locking mechanism with the corresponding structure of the first folding seat locks the second safety device.

[0004] While this folding structure possesses dual-locking capability, the quick-release handle is directly hinged to the second pivot, which in turn drives the eccentric wheel mechanism. This results in insufficient force for the quick-release handle to operate the eccentric wheel mechanism, and a large required operating (flipping) stroke for the unlocking handle. Consequently, the folding structure is inconvenient, time-consuming, and laborious to use, negatively impacting the user experience. Furthermore, the traditional folding structure's rotating hook lacks sufficient locking force when engaging with the positioning structure of the first folding seat, posing a risk of failure for the first safety device during use. Utility Model Content

[0005] This utility model proposes an eccentric folding structure and a portable vehicle to solve the technical problems of insufficient force when the quick-release handle of the traditional folding structure is turned on to activate the eccentric wheel mechanism and the large stroke required to unlock the handle.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides an eccentric folding structure, including a first joint and a second joint hinged together by a first rotating shaft, a first safety device and a second safety device for locking the first joint and the second joint, wherein the first safety device is used to keep the first joint and the second joint locked together when the second safety device fails, the first safety device includes a second rotating shaft, which is installed on the second joint on the other side opposite to the first rotating shaft; and an eccentric wheel, which is hinged on the second rotating shaft;

[0008] The eccentric folding structure also includes:

[0009] A slot is located on the opposite side of the first connector from the first rotating shaft;

[0010] The limiting component is installed on the inside of the card slot;

[0011] The rotating hook includes a sleeve portion that engages with an eccentric wheel, a locking portion that extends radially from the sleeve portion, the locking portion having a slot that matches the shape of the limiting member, and an adjusting member that is telescopically and movably connected to the inner surface of the slot for adjusting the size of the slot to fit snugly with the limiting member.

[0012] The first reset component is sleeved on the eccentric wheel and connected between the rotating hook and the second connector. It is used to drive the rotating hook to rotate with the eccentric wheel so that the rotating hook is reset to the initial state of the hook extending upward. When the first connector and the second connector are fastened together, the limiting component is engaged with the latch and adjusting component in the initial state of the hook to lock the first safety device.

[0013] The quick-release handle is fitted onto the eccentric wheel and located on the outside of the rotating hook;

[0014] With the hook initially in its initial state, move the quick-release handle away from the first connector until the latch and adjustment part disengage from the limiting part to unlock the first safety device.

[0015] Furthermore, the limiting element is a limiting shaft, and the first safety device also includes:

[0016] A limiting sleeve is fitted onto a limiting shaft, and the end of the adjusting component extending out of the bayonet has an adjusting groove that matches the shape of the limiting sleeve.

[0017] The limiting shaft engages with the locking slot and adjusting groove of the locking sleeve in the initial state of the hook to lock the first safety device.

[0018] Preferably, the quick-release handle includes:

[0019] handle body;

[0020] A pair of handle wheel sleeves are spaced apart at one end of the handle body. The inner side of the handle wheel sleeves forms handle sleeve holes that match the shape of the eccentric wheel. The quick-release handle is fitted onto the eccentric wheel through the corresponding handle sleeve holes of the pair of handle wheel sleeves.

[0021] Preferably, the second rotating shaft is cylindrical, the eccentric wheel is a cylindrical shape with a notch on one side with a longitudinal section perpendicular to the eccentric wheel axis, the inner side of the eccentric wheel has a cylindrical eccentric hinge hole that matches the shape of the second rotating shaft, the inner side of the wheel sleeve has a cylindrical hook sleeve hole that matches the shape of the eccentric wheel, and the handle sleeve hole is a cylindrical shape with a notch that matches the shape of the eccentric wheel.

[0022] The eccentric wheel is hinged to the second shaft through an eccentric hinge hole, and the wheel sleeve is sleeved to the eccentric wheel through a hook sleeve hole.

[0023] Preferably, the engaging portion includes:

[0024] An extension section extending radially from the wheel sleeve portion is connected to a snap-fit ​​section at the end of the extension section away from the wheel sleeve portion. A snap-fit ​​opening is formed between the extension section and the snap-fit ​​section. An adjusting member is telescopically and movably connected to the inner surface of the snap-fit ​​section facing the snap-fit ​​opening.

[0025] Preferably, the snap-fit ​​section is provided with a threaded through hole that connects to the snap-fit ​​opening, and the adjusting element is an adjusting screw that matches the threaded through hole. The adjusting screw is telescopically connected to the inner surface of the snap-fit ​​opening by cooperating with the threaded through hole.

[0026] Furthermore, the first safety device also includes:

[0027] The first limiting structure is located on the wheel sleeve part;

[0028] The second limiting structure is provided on the quick-release handle in a matching manner with the first limiting structure;

[0029] Move the quick-release handle away from the first connector and flip it until the second limiting structure contacts the first limiting structure. This will cause the rotating hook to flip away from the initial state of the hook along with the eccentric wheel away from the first connector, so that the latch disengages from the limiting component and unlocks the first safety device.

[0030] Preferably, a pair of first protrusions are provided on the side of the first connector opposite to the hinge side of the second connector, and the pair of first protrusions and the first connector form a groove. The first protrusions are provided with mounting holes that match the shape of the limiting member, and the two ends of the limiting member are respectively inserted into the corresponding mounting holes of the pair of first protrusions.

[0031] Preferably, in the initial state, the hook is rotated back to its original position so that it extends vertically upwards and the top surface of the latch remains parallel to the horizontal plane;

[0032] When the first connector and the second connector are engaged, the top surface of the first protrusion is parallel to the horizontal plane.

[0033] This utility model also provides a portable vehicle, including the above-mentioned eccentric folding structure.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The eccentric folding structure provided by this utility model increases the force required to turn the eccentric wheel mechanism with the quick-release handle, while shortening the flipping stroke required to unlock the handle. This makes the folding structure easier to use, saves time and effort, improves the user experience, and increases the locking force when the rotating hook engages with the positioning structure of the first folding seat. This reduces the risk of the first safety device failing under external impact due to insufficient locking force during use. Attached Figure Description

[0036] To more clearly illustrate the technical solution proposed by this utility model, the present utility model will be described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the embodiments and accompanying drawings described in the following detailed description are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0037] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the eccentric folding structure provided by this utility model;

[0038] Figure 2 A front view schematic diagram of an embodiment of the eccentric folding structure provided by this utility model;

[0039] Figure 3 A front view schematic diagram of an embodiment of the eccentric folding structure provided by this utility model;

[0040] Figure 4 A rear view schematic diagram of an embodiment of the eccentric folding structure provided by this utility model;

[0041] Figure 5 A top view schematic diagram of an embodiment of the eccentric folding structure provided by this utility model;

[0042] Figure 6 A bottom view of an embodiment of the eccentric folding structure provided by this utility model;

[0043] Figure 7 for Figure 1 An exploded three-dimensional structural diagram of an embodiment of the eccentric folding structure;

[0044] Figure 8 for Figure 2 A cross-sectional schematic diagram of the eccentric folding structure in the diagram;

[0045] Figure 9 An exploded three-dimensional structural diagram of Embodiment 2 of the eccentric folding structure provided by this utility model;

[0046] Figure 10 A three-dimensional structural schematic diagram of Embodiment 3 of the eccentric folding structure provided by this utility model;

[0047] Figure 11 for Figure 10 A schematic diagram of the exploded three-dimensional structure of the eccentric folding structure in the image.

[0048] The main markings in the attached figures are as follows:

[0049] 1. First connector; 11. First protrusion; 111. Mounting hole; 12. Slot; 13. Stem; 131. Locking limit structure; 1311. Limiting groove; 1312. Second guide cone surface; 2. Second connector; 21. Second protrusion; 211. Rotary shaft hinge hole; 212. Fourth limiting structure; 3. First rotating shaft; 4. Second rotating shaft; 41. Threaded hole; 5. Eccentric wheel; 51. Longitudinal section; 52. Eccentric hinge hole; 6. Limiting component; 61. Limiting sleeve; 611. Raised arc surface; 7. Rotating hook; 71. Wheel sleeve part; 711. Hook sleeve hole; 72. Engaging part; 721. Extension end; 722. Engaging section; 7221. Threaded through hole; 723. 724. Bayonet; 73. Third limiting structure; 74. Adjusting component; 8. First limiting structure; 9. First resetting component; 10. Quick release handle; 11. Handle body; 12. Handle back plate; 13. Hinge end; 14. Free end; 15. Handle clearance groove; 16. Handle side plate; 17. Handle wheel sleeve; 18. Handle sleeve hole; 19. Wheel sleeve mounting seat; 10. Second limiting structure; 11. Hook stop; 12. Screw hole; 13. Movable locking structure; 14. Slide boss; 15. Slide channel; 16. Slider; 17. Movable component; 18. First guide cone surface; 19. Third resetting component; 10. Locking handle. Detailed Implementation

[0050] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following description is provided in conjunction with the appendix. Figure 1-11 The present invention will be further described in detail with reference to the embodiments.

[0051] Please refer to the following: Figure 1-11The eccentric folding structure provided by this utility model includes a first joint 1 and a second joint 2 hinged together by a first rotating shaft 3. A first safety device and a second safety device are used to lock the first joint 1 and the second joint 2. The first safety device is used to keep the first joint 1 and the second joint 2 locked together when the second safety device fails, at which time the eccentric folding structure is in a single-lock state. When the first safety device and the second safety device are both effective, the eccentric folding structure is in a double-lock state, at which time the first joint 1 and the second joint 2 are locked together. When both the first safety device and the second safety device fail, the eccentric folding structure is in an unlocked state, at which time the first joint 1 and the second joint 2 can be separated and opened.

[0052] The first safety device includes a second rotating shaft 4, which is installed on the second joint 2 on the opposite side of the first rotating shaft 3; and an eccentric wheel 5, which is hinged to the second rotating shaft 4.

[0053] The eccentric folding structure also includes:

[0054] A slot 12 is located on the other side of the first connector 1 opposite to the first rotating shaft 3; a limiting member 6 is installed inside the slot 12; a rotating hook 7 includes a sleeve portion 71 that engages with the eccentric wheel 5, and a locking portion 72 that extends radially from the sleeve portion 71. The locking portion 72 is provided with a slot 723 that matches the shape of the limiting member 6, and an adjusting member 73 that is telescopically connected to the inner surface of the slot 723 for adjusting the size of the slot 723 to fit snugly with the limiting member 6.

[0055] The first reset member 8 is sleeved on the eccentric wheel 5 and connected between the rotating hook 7 and the second connector 2. It is used to drive the rotating hook 7 to rotate with the eccentric wheel 5 so that the rotating hook 7 is reset to the initial state of the hook extending upward. When the first connector 1 and the second connector 2 are fastened, the limiting member 6 is driven to engage with the latch 723 and the adjusting member 73 in the initial state of the hook to lock the first safety device.

[0056] And quick-release handle 9, which is fitted onto eccentric wheel 5 and located on the outside of rotating hook 7.

[0057] With the hook in its initial state, move away from the first connector 1 and pull the quick-release handle 9 until the latch 723 and the adjusting member 73 disengage from the limiting member 6 to unlock the first safety device.

[0058] The eccentric folding structure provided by this utility model has a quick-release handle 9 that is not hinged to the second rotating shaft 4. Instead, the eccentric wheel 5 is first hinged to the second rotating shaft 4 installed on one side of the second connector 2, and the rotating hook 7 is sleeved on the eccentric wheel 5 through its wheel sleeve part 71. Then, the quick-release handle 9 is sleeved on the eccentric wheel 5 and located outside the rotating hook 7. Therefore, the eccentric folding structure can directly push the quick-release handle 9 away from the first connector 1 (i.e., close to the second connector 2), so that the quick-release handle 9 directly pushes the eccentric wheel 5 to rotate eccentrically around the second rotating shaft 4, thereby pushing the rotating hook 7 upward until its adjusting slot 723 disengages upward from the limiting member 6. This increases the force of the quick-release handle 9 in pulling the eccentric wheel 5 mechanism, while shortening the pulling (flipping) stroke required to unlock the handle, making the folding structure convenient to use, saving time and effort, and improving the user experience.

[0059] Please refer to the following: Figure 2 , 7 -9. In a preferred embodiment of the eccentric folding structure provided by this utility model, the limiting member 6 is a cylindrical limiting shaft.

[0060] In other embodiments of the eccentric folding structure provided by this utility model (not shown in the figure), the limiting member 6 can also be a limiting shaft with an elliptical cross-section.

[0061] Please see Figure 9 In Embodiment 2 of the eccentric folding structure provided by this utility model, the limiting member 6 is a limiting shaft, and the first safety device further includes:

[0062] The limiting sleeve 61 is sleeved on the limiting shaft (limiting member 6), and the end of the adjusting member 73 extending out of the bayonet 723 is provided with an adjusting groove (not shown in the figure) that matches the shape of the limiting sleeve 61.

[0063] The limiting shaft (limiting member 6) engages with the locking slot 723 and adjusting groove of the hook in the initial state through the limiting sleeve 61, thereby increasing the locking force when the rotating hook 7 engages with the positioning structure of the first folding seat, so as to lock the first safety device and reduce the risk of failure of the first safety device due to insufficient locking force under external impact during use.

[0064] Please see Figure 9 In a preferred embodiment of the second embodiment of the eccentric folding structure provided by this utility model, the limiting member 6 is a cylindrical limiting shaft, the limiting sleeve 61 is an annular shape with a central convexity and converging ends, the outer wall surface of the limiting sleeve 61 forms a convex arc surface 611, and the end of the adjusting member 73 extending out of the bayonet 723 is provided with an adjusting groove that matches the shape of the convex arc surface 611 of the limiting sleeve 61.

[0065] Please refer to the following: Figure 1-24-8, In one embodiment of the eccentric folding structure provided by this utility model, the quick-release handle 9 includes:

[0066] Handle body 91; a pair of handle wheel sleeves 92, spaced apart at one end of the handle body 91, the inner side of the handle wheel sleeves 92 forms handle sleeve holes 921 that match the shape of the eccentric wheel 5, the quick-release handle 9 is fitted onto the eccentric wheel 5 through the corresponding handle sleeve holes 921 of the pair of handle wheel sleeves 92.

[0067] Please refer to the following: Figure 7-8 In a preferred embodiment of the eccentric folding structure provided by this utility model, the second rotating shaft 4 is cylindrical, the eccentric wheel 5 is a cylindrical shape with a notch formed on one side of the longitudinal section 51 perpendicular to the axial direction of the eccentric wheel 5, the inner side of the eccentric wheel 5 forms a cylindrical eccentric hinge hole 52 that matches the shape of the second rotating shaft 4, the inner side of the wheel sleeve 71 forms a cylindrical hook sleeve hole 711 that matches the shape of the eccentric wheel 5, and the handle sleeve hole 921 is a cylindrical shape with a notch that matches the shape of the eccentric wheel 5.

[0068] The eccentric wheel 5 is eccentrically hinged to the second rotating shaft 4 through the eccentric hinge hole 52, and the wheel sleeve part 71 is sleeved to the eccentric wheel 5 through the hook sleeve hole 711. At the same time, the handle sleeve 92 at one end of the handle body 91 has a handle sleeve hole 921 that matches the shape of the eccentric wheel 5.

[0069] When the user moves the quick-release handle 9 away from the first connector 1 (i.e., close to the second connector 2) in the initial state of the hook, the handle socket 921, which is also cylindrical with a notch, cooperates with the eccentric wheel 5. This allows the quick-release handle 9 to directly push the eccentric wheel 5 to rotate eccentrically around the second rotating shaft 4 until the rotating hook 7 is pushed upward and the adjusting latch 723 is disengaged from the limiting member 6. This further increases the force of the quick-release handle 9 in moving the eccentric wheel 5 and further shortens the levering (flipping) stroke required to unlock the handle. This makes the folding structure more convenient to use, saves time and effort, and improves the user experience.

[0070] Please refer to the following: Figure 1-2 4, 6-7, In one embodiment of the eccentric folding structure provided by this utility model, a pair of handle wheel sleeves 92 are integrally spaced at one end of the handle body 91, and the pair of handle wheel sleeves 92 and the handle body 91 are integrally formed (i.e., connected as a whole).

[0071] Please refer to the following: Figure 10-11In the third embodiment of the eccentric folding structure provided by this utility model, a pair of handle wheel sleeves 92 are spaced apart on the wheel sleeve mounting seat 93. The wheel sleeve mounting seat 93 is then detachably connected to the handle body 91 by passing the corresponding mounting holes 111 of the wheel sleeve mounting seat 93 and the handle body 91 through connecting screws or bolts.

[0072] Please refer to the following: Figure 7-8 In one embodiment of the eccentric folding structure provided by this utility model, the engaging portion 72 includes:

[0073] An extension of the wheel sleeve portion 71 extends radially from the wheel sleeve portion 71, and a snap-fit ​​portion 722 is connected to the end of the extension portion away from the wheel sleeve portion 71. A snap-fit ​​opening 723 is formed between the extension portion and the snap-fit ​​portion 722. An adjusting member 73 is telescopically and movably connected to the inner surface of the snap-fit ​​portion 722 facing the snap-fit ​​opening 723.

[0074] Please refer to the following: Figure 7-8 In a preferred embodiment of the eccentric folding structure provided by this utility model, the snap-fit ​​section 722 is provided with a threaded through hole 7221 that connects to the snap-fit ​​opening 723, and the adjusting member 73 is an adjusting screw that matches the threaded through hole 7221. The adjusting screw (adjusting member 73) is movably connected to the inner surface of the snap-fit ​​opening 723 by cooperating with the threaded through hole 7221.

[0075] Please refer to the following: Figure 7-8 In one embodiment of the eccentric folding structure provided by this utility model, the first safety device further includes:

[0076] The first limiting structure 74 is provided on the wheel sleeve part 71; the second limiting structure 94 is provided on the quick release handle 9 in a matching manner with the first limiting structure 74.

[0077] In the initial state of the hook, by moving the quick-release handle 9 away from the first connector 1 (i.e., closer to the second connector 2), the quick-release handle 9 directly pushes the eccentric wheel 5 to rotate eccentrically around the second rotating shaft 4 until the rotating hook 7 is lifted upwards until its adjusting slot 723 disengages upwards from the limiting member 6. At this time, the second limiting structure 94 just flips with the quick-release handle 9 to contact the first limiting structure 74. Afterwards, continuing to move the quick-release handle 9 causes the rotating hook 7 to flip away from the first connector 1 from the initial hook state along with the eccentric wheel 5. During this process, the adjusting slot 723 gradually tilts downwards until it is completely disengaged from the limiting member 6. At this point, the slot 723 is completely disengaged from the limiting member 6, and the first safety device is unlocked. At this point, further unlocking the second safety device allows the first connector 1 to flip away from the second connector 2 around the first rotating shaft 3, achieving separation and folding of the two.

[0078] After the dual safety devices of the first connector 1 and the second connector 2 are unlocked, separated, and folded, the first reset member 8 drives the rotating hook 7 to rotate as the eccentric wheel 5 approaches the first connector 1 and resets it to the initial state of the hook extending upwards.

[0079] Please refer to the following: Figure 7-8 In a preferred embodiment of the eccentric folding structure provided by this utility model, the first limiting structure 74 is a limiting protrusion provided at the end of the wheel sleeve portion 71 away from the engaging portion 72, and the second limiting structure 94 is a handle end face provided at the end of the quick release handle 9 near the eccentric wheel 5, matching the limiting protrusion (first limiting structure 74).

[0080] In other embodiments of the eccentric folding structure provided by this utility model (not shown in the figure), the first limiting structure 74 may also be a limiting protrusion provided at the end of the wheel sleeve portion 71 away from the engaging portion 72, and the second limiting structure 94 may be a handle end face or a limiting protrusion provided at the end of the quick release handle 9 near the eccentric wheel 5 in a matching manner with the limiting protrusion (first limiting structure 74).

[0081] In a preferred embodiment of the eccentric folding structure provided by this utility model (not shown in the figure), the first safety device further includes:

[0082] The second reset component is sleeved on the second rotating shaft 4 and connected between the quick-release handle 9 and the second connector 2. After the double safety device of the first connector 1 and the second connector 2 is unlocked and separated, and folded, when the lock is loosened, the second reset component drives the quick-release handle 9 to approach the first connector 1 and flip until the quick-release handle 9 abuts against the outside of the rotating hook 7 which is reset to the initial state of the upward-extending hook, that is, the handle initial state of the quick-release handle 9 is automatically reset.

[0083] Please refer to the following: Figure 4 , 6 -8. In a more preferred embodiment of the eccentric folding structure provided by this utility model, both the first reset member 8 and the second reset member are reset torsion springs.

[0084] In other embodiments of the eccentric folding structure provided by this utility model (not shown in the figure), the first reset member 8 and the second reset member can also be reset springs.

[0085] Please refer to the following: Figure 1 , 7-8. In one embodiment of the eccentric folding structure provided by this utility model, a pair of first protrusions 11 are provided at intervals on the other side of the first connector 1 relative to the hinge side of the second connector 2. The pair of first protrusions 11 and the first connector 1 form the above-mentioned slot 12. The slot 12 is a through groove that passes through the pair of first protrusions 11 vertically. The first protrusion 11 is provided with mounting holes 111 that match the shape of the limiting member 6. The two ends of the limiting member 6 are respectively inserted into the corresponding mounting holes 111 of the pair of first protrusions 11.

[0086] Please refer to the following: Figure 1-2 4, 7-8, In a preferred embodiment of the eccentric folding structure provided by this utility model, in the initial state of the hook, the hook 7 is rotated to return to its vertically upward extension, and the top surface of the latch 723 is kept parallel to the horizontal plane. In the engaged state of the first connector 1 and the second connector 2, the top surface of the first protrusion 11 is parallel to the horizontal plane.

[0087] Please refer to the following: Figure 1-2 4, 6-8, In one embodiment of the eccentric folding structure provided by this utility model, the second connector 2 is provided with a pair of second protrusions 21 at intervals on the other side relative to the first rotating shaft 3. The second protrusions 21 are provided with rotating shaft hinge holes 211 that match the shape of the second rotating shaft 4. The two ends of the second rotating shaft 4 are respectively inserted into the corresponding rotating shaft hinge holes 211 of the pair of second protrusions 21.

[0088] Please refer to the following: Figure 7-8 In a preferred embodiment of the eccentric folding structure provided by this utility model, the first safety device further includes:

[0089] The third limiting structure 724 is located at the connection between the extension section and the wheel sleeve end. The second protrusion 21 is provided with a fourth limiting structure 212 that matches the third limiting structure 724. During the upward and downward flipping process of the rotating hook 7, the third limiting structure 724 and the fourth limiting structure 212 cooperate to limit the upward flipping stroke of the rotating hook 7 to a slightly biased hook-fitting state towards the first connector 1, and at the same time limit the downward flipping stroke of the rotating hook 7 to a certain angle with the second connector 2.

[0090] Please refer to the following: Figure 7-8 In a more preferred embodiment of the eccentric folding structure provided by this utility model, the third limiting structure 724 is a limiting protrusion provided on the side of the connection between the extension section and the wheel sleeve end, and the fourth limiting structure 212 is a guide arc surface provided on the top surface of the second protrusion 21 away from the edge of the second connector 2.

[0091] In other embodiments of the eccentric folding structure provided by this utility model (not shown in the figure), the third limiting structure 724 may also be a limiting protrusion provided on the side of the connection between the extension section and the wheel sleeve end, and the fourth limiting structure 212 may be a guide straight surface provided on the top surface of the second protrusion 21 away from the edge of the second connector 2.

[0092] Please refer to the following: Figure 1-2 4-8, In a preferred embodiment of the eccentric folding structure provided by this utility model, the handle body 91 includes:

[0093] The handle back plate 911 has a hinge end 9111 at one end, which is provided with a pair of handle wheel sleeves 92, and the other end of the handle back plate 911 opposite to the hinge end 9111 is a free end 9112; a pair of handle side plates 912 are respectively provided on the opposite edges of the inner side of the handle back plate 911 facing the first joint 1, and the two ends of the handle side plates 912 extend to the top of the handle back plate 911 away from the eccentric wheel 5 (i.e., near the free end 9112) and the middle section of the handle back plate 911, respectively.

[0094] Quick-release handle 9 also includes:

[0095] A pair of hook-and-stop plates 95 are provided. One end of each hook-and-stop plate 95 is provided with a screw hole 951. Both ends of the second rotating shaft 4 are respectively provided with a pair of threaded holes 41 that match the screw hole 951. The pair of hook-and-stop plates 95 are respectively installed on both ends of the second rotating shaft 4 by connecting screws passing through the corresponding screw hole 951 and threaded hole 41. They cover the gap area adjacent to the pair of handle side plates 912 on both sides of the hinge end 9111 of the handle back plate 911, so as to shield and protect the rotating hook 7 located on the inside of the quick-release handle 9.

[0096] Please refer to the following: Figure 1-2 5, 7-8, In one embodiment of the eccentric folding structure provided by this utility model, the eccentric folding structure further includes a stem 13, which is installed on the first connector 1 for mounting the handlebars (not shown in the figure).

[0097] The second safety device includes:

[0098] The movable locking structure 96 is movably installed in the handle cavity formed by the side of the handle back plate 911 facing the first connector 1 and a pair of handle side plates 912; the locking limiting structure 131 is installed on the stem 13 and is used to cooperate with the movable locking structure 96 to lock or unlock the second safety device.

[0099] Please refer to the following: Figure 1-2 5, 7-8, In a preferred embodiment of the eccentric folding structure provided by this utility model, the movable locking structure 96 is disposed in the middle of the handle back plate 911, biased towards the free end 9112. The movable locking structure 96 includes:

[0100] A slide boss 961 is provided on the inner surface of the handle back plate 911 facing the first connector 1; a sliding channel 9611 is provided on the slide boss 961 and passes through the handle cavity and the outer surface of the handle back plate 911 facing away from the first connector 1; a slider 962 is movably installed in the sliding channel 9611; a movable member 963 is installed on the side of the slider 962 facing the first connector 1, and the bottom end of the movable member 963 is provided with a first guide cone surface 9631; a third reset member 964 is connected between the slide boss 961 and the slider 962.

[0101] The locking and limiting structure 131 is a limiting block that matches the movable part 963, and the position of the limiting block matches the slider 962. The top of the limiting block facing away from the second connector 2 is provided with a limiting groove 1311, and the side edge of the limiting block facing away from the handlebar 13 is provided with a second guide cone surface 1312 that extends to the edge of the limiting groove 1311 and matches the first guide cone surface 9631.

[0102] As the quick-release handle 9 is flipped closer to the first connector 1 until it is nearly parallel to the vertical direction and close to the handle of the stem 13 at the top of the first connector 1, the second guide cone 1312 contacts the first guide cone 9631 and guides the first guide cone 9631 to gradually slide upward along the second guide cone 1312. At the same time, the slider 962 is pushed to move the movable part 963 away from the limit block and compress the third reset part 964 until the first guide cone 9631 passes the second guide cone 1312 and reaches above the limit groove 1311. At this time, the third reset part 964 is released from compression. Under the reset action of the third reset part 964, the slider 962 is pushed to move the movable part 963 closer to the limit block until the bottom end of the movable part 963 contacts and is locked into the limit groove 1311, thereby locking the second safety device. At this time, the folding secondary safety structure is in a double-locked state.

[0103] When the eccentric folding structure is in a double-locked state, by pushing the slider 962, the movable part 963 moves away from the limiting block and compresses the third reset part 964 until the movable part 963 is completely disengaged from the limiting groove 1311. At this time, the quick-release handle 9 is released. Under the reset action of the second reset, the quick-release handle 9 is pushed from the handle-fitted state to the second connector 2 and flipped until the quick-release handle 9 flips to the handle initial state which is close to the vertical direction at a 45-degree angle. At the same time, under the reset action of the third reset part 964, the slider 962 is pushed to reset the movable part 963 to the initial state of the slider 962, thereby unlocking the second safety device. At this time, the eccentric folding structure is in a single-locked state.

[0104] Please refer to the following: Figure 8In a more preferred embodiment of the eccentric folding structure provided by this utility model, the third reset member 964 is a third reset spring, one end of the third reset spring (third reset member 964) abuts against the slider 962, and the other end of the third reset spring (third reset member 964) abuts against the quick release handle 9.

[0105] In other embodiments of the eccentric folding structure provided by this utility model (not shown in the figure), the third reset member 964 can also be a reset spring.

[0106] Please refer to the following: Figure 1-2 5. 7-8. In a more preferred embodiment of the eccentric folding structure provided by this utility model, the outer surface of the handle back plate 911 facing away from the first connector 1 is provided with a handle relief groove 9113, and the slider 962 is provided with a locking handle 965 on the side facing away from the first connector 1, which is accommodated in the handle relief groove 9113, so that the user can hold the locking handle 965 and slide it back and forth in the handle relief groove 9113, thereby pushing the slider 962 to drive the movable part 963 to slide back and forth along the sliding channel 9611.

[0107] In other embodiments of the eccentric folding structure provided by this utility model (not shown in the figure), the movable locking structure 96 may also consist of a lever assembly rotatably mounted on the quick-release handle 9 and a torsion spring connecting the lever assembly and the quick-release handle 9, and the locking limiting structure 131 is a lever buckle groove that matches the lever assembly.

[0108] This utility model also provides a portable vehicle (not shown in the figure), which includes the above-mentioned eccentric folding structure.

[0109] In one embodiment of the portable vehicle provided by this utility model, the portable vehicle includes a base and the aforementioned handlebar 13, with the second connector 2 mounted on the base.

[0110] In one embodiment of the portable vehicle provided by this utility model, the portable vehicle includes a frame and the aforementioned handlebar 13, with the second connector 2 mounted on the frame.

[0111] In one embodiment of the portable vehicle provided by this utility model, the portable vehicle includes a seat post and the aforementioned handlebar 13, with the second connector 2 mounted on the seat post.

[0112] In a preferred embodiment of the portable vehicle provided by this utility model, the portable vehicle is a portable bicycle, electric vehicle, scooter, or wheelchair.

[0113] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An eccentric folding structure, comprising a first joint (1) and a second joint (2) hinged vertically by a first pivot (3), a first safety device and a second safety device for locking the first joint (1) and the second joint (2), wherein the first safety device is used to maintain the first joint (1) and the second joint (2) in mutual engagement when the second safety device fails, characterized in that, The first safety device includes a second rotating shaft (4) mounted on the second joint (2) on the other side opposite to the first rotating shaft (3); and an eccentric wheel (5) hinged to the second rotating shaft (4). The eccentric folding structure also includes: A slot (12) is provided on the other side of the first connector (1) opposite to the first rotating shaft (3); A limiting member (6) is installed on the inner side of the slot (12); The rotating hook (7) includes a sleeve portion (71) that is sleeved with the eccentric wheel (5), and a locking portion (72) that extends radially from the sleeve portion (71). The locking portion (72) is provided with a slot (723) that matches the shape of the limiting member (6), and an adjusting member (73) that is telescopically connected to the inner surface of the slot (723) for adjusting the size of the slot (723) to fit snugly with the limiting member (6). The first reset component (8) is sleeved on the eccentric wheel (5) and connected between the rotating hook (7) and the second connector (2). It is used to drive the rotating hook (7) to rotate with the eccentric wheel (5) so that the rotating hook (7) is reset to the initial state of the hook extending upward. When the first connector (1) and the second connector (2) are engaged, the limiting component (6) engages with the latch (723) in the initial state of the hook and the adjusting component (73) to lock the first safety device. The quick-release handle (9) is sleeved on the eccentric wheel (5) and located on the outside of the rotating hook (7); With the hook in its initial state away from the first connector (1), pull the quick-release handle (9) until the latch (723) and the adjusting member (73)(63) disengage from the limiting member (6) to unlock the first safety device.

2. The eccentric folding structure as described in claim 1, characterized in that, The limiting member (6) is a limiting shaft, and the first safety device further includes: A limiting sleeve (61) is fitted onto the limiting member (6), and the end of the adjusting member (73) extending out of the bayonet (723) is provided with an adjusting groove that matches the shape of the limiting sleeve (61). The limiting shaft engages with the locking slot (723) of the hook in its initial state and the adjusting groove through the limiting sleeve (61) to lock the first safety device.

3. The eccentric folding structure as described in claim 1, characterized in that, The quick-release handle (9) includes: handle body(91); A pair of handle sleeves (92) are spaced apart at one end of the handle body (91). The inner side of the handle sleeves (92) forms handle socket holes (921) that match the shape of the eccentric wheel (5). The quick-release handle (9) is fitted onto the eccentric wheel (5) through the corresponding handle socket holes (921) of the pair of handle sleeves (92).

4. The eccentric folding structure as described in claim 3, characterized in that, The second rotating shaft (4) is cylindrical, the eccentric wheel (5) is a cylindrical shape with a notch formed on one side with a longitudinal section (51) perpendicular to the axial direction of the eccentric wheel (5), the inner side of the eccentric wheel (5) forms a cylindrical eccentric hinge hole (52) that matches the shape of the second rotating shaft (4), the inner side of the wheel sleeve (71) forms a cylindrical hook sleeve hole (711) that matches the shape of the eccentric wheel (5), and the handle sleeve hole (921) is a cylindrical shape with a notch that matches the shape of the eccentric wheel (5); The eccentric wheel (5) is hinged to the second rotating shaft (4) through the eccentric hinge hole (52), and the wheel sleeve (71) is sleeved on the eccentric wheel (5) through the hook sleeve hole (711).

5. The eccentric folding structure as described in any one of claims 1-4, characterized in that, The engaging portion (72) includes: An extension of the wheel sleeve portion (71) extends radially out of the wheel sleeve portion (71), and a snap-fit ​​section (722) is connected to the end of the extension away from the wheel sleeve portion (71). The extension and the snap-fit ​​section (722) form a bayonet (723). The adjusting member (73) is telescopically connected to the inner surface of the snap-fit ​​section (722) facing the bayonet (723).

6. The eccentric folding structure as described in claim 5, characterized in that, The snap-fit ​​section (722) is provided with a threaded through hole (7221) communicating with the bayonet (723). The adjusting member (73) is an adjusting screw that matches the threaded through hole (7221). The adjusting screw is telescopically connected to the inner surface of the bayonet (723) by cooperating with the threaded through hole (7221).

7. The eccentric folding structure as described in any one of claims 1-4, characterized in that, The first safety device also includes: A first limiting structure (74) is provided on the wheel sleeve portion (71); A second limiting structure (94) is provided on the quick-release handle (9) in a manner that matches the first limiting structure (74); Move the quick-release handle (9) away from the first connector (1) and flip it until the second limiting structure (94) contacts the first limiting structure (74), and drive the rotating hook (7) to flip away from the first connector (1) along with the eccentric wheel (5) from the initial state of the hook, so that the bayonet (723) disengages from the limiting member (6) and unlocks the first safety device.

8. The eccentric folding structure as described in any one of claims 1-4, characterized in that, The first connector (1) is provided with a pair of first protrusions (11) at intervals on the other side of its hinge side with the second connector (2). The pair of first protrusions (11) and the first connector (1) form the slot (12). The first protrusions (11) are provided with mounting holes (111) that match the shape of the limiting member (6). The two ends of the limiting member (6) are respectively inserted into the corresponding mounting holes (111) of the pair of first protrusions (11).

9. The eccentric folding structure as described in claim 8, characterized in that, The hook is rotated (7) in its initial state to return to a vertically upward extension and to keep the top surface of the latch (723) parallel to the horizontal plane; When the first connector (1) and the second connector (2) are engaged, the top surface of the first protrusion (11) is parallel to the horizontal plane.

10. A portable vehicle, characterized in that, Including the eccentric folding structure as described in any one of claims 1-9.

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