Folding device and scooter applying the same

Abstract

The application discloses a folder and a scooter applying the same, the folder comprises a first connecting seat provided with a first locking matching part and a second locking matching part, a second connecting seat rotationally connected with the first connecting seat, a first locking mechanism and a second locking mechanism both matched with a same eccentric shaft member and arranged in the second connecting seat, the eccentric shaft member sequentially comprises a transmission section, an eccentric section and a supporting section along its own axial direction, the transmission section and the supporting section are rotationally supported on the second connecting seat, the second locking mechanism is matched with the eccentric section, and the first locking mechanism is connected with the transmission section; when the first locking mechanism and the first locking matching part are unlocked and continue to rotate, the eccentric shaft member is driven to rotate through the transmission section, so that the eccentric section moves along an eccentric track and drives the second locking mechanism to move towards a direction of separating from the second locking matching part in the movement process, so as to release the locking between the second locking matching part.

Description

Technical Field

[0001] This application relates to the technical field of folding scooters, and more particularly to a folding device and a scooter using the same. Background Technology

[0002] With the increasing popularity of lightweight personal transportation tools such as scooters, a folding mechanism is typically installed between the frame and the seat tube to balance portability and riding stability, allowing the vehicle to switch between an unfolded and folded state. Since scooters need to withstand impact loads, steering loads, and vibration loads from the road surface during riding, existing folding mechanisms usually employ two- or multi-stage locking structures to ensure sufficient connection strength and reliability in the unfolded state. Multiple locking mechanisms work together to improve locking reliability in the unfolded state.

[0003] However, in the existing technology, different locking mechanisms are usually configured with corresponding driving components, transmission components or unlocking mechanisms. Most of the locking mechanisms are independent of each other, which not only makes the overall structure of the folder more complex, with more parts and higher assembly costs, but also lacks an effective linkage between multiple locking mechanisms. During the unlocking process, each locking mechanism usually needs to be driven separately to complete the unlocking, which makes the unlocking process cumbersome and the operation less continuous.

[0004] In addition, although some existing folding devices can achieve linkage between multiple locking mechanisms, they usually still need to set up additional linkage components or intermediate transmission mechanisms. This not only increases the number of mechanism layers, but also increases the accumulation of assembly errors and the risk of wear after long-term use, which is not conducive to the miniaturization design and long-term reliable use of the folding device.

[0005] Therefore, how to reduce the number of drive and transmission components while ensuring the multi-level locking reliability of the folding device, and realize the linkage control between multiple locking mechanisms to simplify the overall structure and improve the continuity of unlocking operations has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the above-mentioned related technologies, the purpose of this application is to provide a folding device and a scooter using the same, so as to overcome the technical problems of the above-mentioned related technologies, such as a large number of parts, complex structure and insufficient linkage between multiple locking mechanisms.

[0007] To achieve the above and other related objectives, the first aspect of this application discloses a folding device for connecting a first folding section and a second folding section of a scooter, enabling the first folding section and the second folding section to switch between a folded state and an unfolded state. The folding device includes a first connecting seat for connecting the first folding section; a second connecting seat for connecting the second folding section and rotatably connected to the first connecting seat; a first locking engagement portion and a second locking engagement portion are provided on the first connecting seat and / or the first folding section; a first locking mechanism and a second locking mechanism are both disposed on the second connecting seat and cooperate with the same eccentric shaft, and respectively cooperate with the first locking engagement portion and the second locking engagement portion to lock the first connecting seat and the second folding section. The second connecting seat is locked in the unfolded state; the eccentric shaft has a transmission section, an eccentric section, and a support section formed sequentially along its own axial direction, and the transmission section, the eccentric section, and the support section are integrally formed or fixedly connected as one unit; the transmission section and the support section are rotatably supported on the second connecting seat, the second locking mechanism is configured to cooperate with the eccentric section, and the first locking mechanism is connected to the transmission section; when the first locking mechanism is unlocked from the first locking engagement and continues to rotate, the eccentric shaft is driven to rotate through the transmission section, so that the eccentric section moves along the eccentric trajectory and, during the movement, causes the second locking mechanism to move in the direction of disengaging from the second locking engagement, so as to release the lock between the second locking engagement and the second locking engagement.

[0008] In some embodiments of the first aspect of this application, the first locking mechanism includes a wrench connected to the eccentric shaft and a first locking member movably disposed inside the wrench, such that when the operator holds the wrench, he / she presses the first locking member to release the locking of the first locking engagement portion and continues to operate the wrench to rotate while maintaining the holding state.

[0009] In some embodiments of the first aspect of this application, the first locking mechanism further includes an elastic member disposed between the first locking member and the wrench, the elastic member being disposed along the pressing direction of the first locking member; when the first locking member moves along the pressing direction, the elastic member is compressed and the first locking member is released from locking with the first locking engagement portion; when the first locking member is released, the elastic member causes the first locking member to reset.

[0010] In some embodiments of the first aspect of this application, the first locking member includes a pressing portion and a locking portion located below the pressing portion to engage with the first locking engagement portion, the pressing portion having an outwardly inclined slope structure to facilitate placement and pressing by an operator.

[0011] In some embodiments of the first aspect of this application, the upper surface of the inclined structure has anti-slip texture.

[0012] In some embodiments of the first aspect of this application, the wrench is provided with a beveled receiving space adapted to the beveled structure, the beveled structure at least partially protruding from the beveled opening of the beveled receiving space when not pressed.

[0013] In some embodiments of the first aspect of this application, the first locking member is provided with a locking hole, and the first locking engagement portion passes through the locking hole. When the axis of the locking hole is offset from the axis of the first locking engagement portion, the hole wall of the locking hole limits the first locking engagement portion to form a locking engagement. When the first locking member is pressed, the locking hole moves to be aligned with the first locking engagement portion, so as to allow the first locking engagement portion to pass through the locking hole and release the lock.

[0014] In some embodiments of the first aspect of this application, the first locking member is provided with a locking hook portion, which hooks with the first locking engagement portion to form a locking engagement. When the first locking member is pressed, the locking hook portion moves along the pressing direction with the first locking member and disengages from the first locking engagement portion, thereby releasing the lock between the first locking member and the first locking engagement portion.

[0015] In some embodiments of the first aspect of this application, the support segment passes through a correction support member, the correction support member is rotatably mounted on the second connecting seat, and the rotation axis of the correction support member is coaxial with the rotation axis of the transmission segment to correct the support position of the support segment relative to the second connecting seat.

[0016] In some embodiments of the first aspect of this application, the outer periphery of the support segment is provided with a non-circular mating structure, and the correction support member is provided with a mounting hole adapted to the non-circular mating structure, so as to restrict the relative rotation between the support segment and the correction support member, so that the support segment drives the correction support member to rotate synchronously.

[0017] In some embodiments of the first aspect of this application, the transmission segment is provided with a transmission engagement structure, and the first locking mechanism is provided with a transmission structure that engages with the transmission engagement structure to restrict the relative rotation between the transmission segment and the first locking mechanism, so that the first locking mechanism drives the transmission segment to rotate synchronously.

[0018] In some embodiments of the first aspect of this application, the transmission engagement structure includes at least one protrusion disposed on the outer periphery of the transmission section, and the transmission structure includes a mating groove formed on the first locking mechanism that is adapted to the protrusion.

[0019] In some embodiments of the first aspect of this application, the transmission engagement structure includes a transmission engagement groove formed on the transmission segment, and the transmission structure includes a transmission rod disposed on the first locking mechanism, the transmission rod extending into the transmission engagement groove to restrict relative rotation between the transmission segment and the first locking mechanism.

[0020] In some embodiments of the first aspect of this application, the axis of the eccentric segment is offset by 2.0 mm to 3.0 mm relative to the axis of the transmission segment.

[0021] In some embodiments of the first aspect of this application, the second locking mechanism includes a second locking member and a locking rod. The second locking member is provided with a locking groove for the second locking mating part to enter or disengage relative to each other. The locking rod extends at least partially into the locking groove so that it abuts against the second locking mating part after the second locking mating part enters the locking groove relative to each other to form a lock. When the eccentric section moves along the eccentric trajectory, it drives the second locking member to move so that the locking rod releases the locking effect on the second locking mating part, allowing the second locking mating part to disengage relative to each other from the locking groove.

[0022] In some embodiments of the first aspect of this application, when the eccentric segment is located below the transmission segment in the locked state, such that when the eccentric segment drives the second locking member to move along the eccentric trajectory, the second locking member has at least an upward component of motion.

[0023] In some embodiments of the first aspect of this application, the locking rod is rotatably disposed on the second locking member, and its length extending into the locking groove can be adjusted by rotation to adjust the locking position between the locking rod and the second locking engagement part.

[0024] In some embodiments of the first aspect of this application, the first folded portion has a longitudinal reference line extending along its length when unfolded, and the axis of the locking rod is inclined relative to the longitudinal reference line so that when the locking rod abuts against the second locking engagement portion, it generates locking components in the radial and axial directions along the first folded portion, respectively restricting the movement of the second locking engagement portion in the corresponding directions.

[0025] In some embodiments of the first aspect of this application, the axis of the locking rod is inclined at an angle of 20° to 24° relative to the longitudinal reference line.

[0026] In some embodiments of the first aspect of this application, the locking groove has a pressure-bearing wall that abuts against the second locking engagement portion. When the locking rod abuts against the second locking engagement portion, the second locking engagement portion is pressed against the pressure-bearing wall so that the second locking engagement portion is clamped between the locking rod and the pressure-bearing wall.

[0027] In some embodiments of the first aspect of this application, the locking groove includes a locking region for forming a lock and a guide region communicating with the locking region, the guide region being gradually expanded along the direction of disengagement of the second locking engagement portion.

[0028] In some embodiments of the first aspect of this application, at least one side of the guide area is formed by a guide ramp.

[0029] In some embodiments of the first aspect of this application, the second locking member is provided with a toggle part located on the movement path of the first locking mechanism. When the first locking mechanism releases the lock between itself and the first locking engagement part and continues to rotate, it abuts against the toggle part to drive the second locking member to rotate, so that the second locking engagement part is relatively disengaged from the locking groove.

[0030] In some embodiments of the first aspect of this application, the actuating portion is configured as a first protrusion formed on the outer periphery of the second locking member.

[0031] In some embodiments of the first aspect of this application, the second locking member is provided with a limiting structure, and the second connecting seat is provided with a limiting abutment portion that cooperates with the limiting structure. When the second locking member continues to rotate to a preset position, the limiting structure abuts against the limiting abutment portion to restrict the second locking member from continuing to rotate.

[0032] In some embodiments of the first aspect of this application, the limiting structure includes a second protrusion formed on the outer periphery of the second locking member, the second protrusion being located outside the second locking member in the unlocking rotation direction and extending along the opening direction of the locking groove.

[0033] In some embodiments of the first aspect of this application, when the first locking mechanism abuts against the actuating part and the limiting structure abuts against the limiting abutting part, the second locking member restricts the first locking mechanism from continuing to rotate through the actuating part.

[0034] In some embodiments of the first aspect of this application, the second locking member is provided with a mating hole that mates with the eccentric segment, the eccentric segment passing through the mating hole, so as to drive the second locking member to move in the direction of disengaging from the second locking mating part when the eccentric segment moves along the eccentric trajectory.

[0035] In some embodiments of the first aspect of this application, the mating hole is a circular hole adapted to the eccentric segment.

[0036] In some embodiments of the first aspect of this application, the mating hole is a circular hole with a diameter larger than the outer dimensions of the eccentric segment, and the circular hole is provided with a mating member that mates with the eccentric segment to adapt to the movement of the eccentric segment along the eccentric trajectory and maintain the driving engagement between the eccentric segment and the second locking member.

[0037] In some embodiments of the first aspect of this application, the mating member is a bushing or sleeve detachably disposed within the mating hole.

[0038] In some embodiments of the first aspect of this application, the mating part is made of a wear-resistant material or a low-friction material.

[0039] In some embodiments of the first aspect of this application, the mating hole is an irregularly shaped hole adapted to the eccentric trajectory of the eccentric segment, so that the eccentric segment maintains a motional engagement with the second locking member during its movement along the eccentric trajectory.

[0040] In some embodiments of the first aspect of this application, the irregular hole includes a central arc portion and two side extensions respectively connected to both sides of the central arc portion.

[0041] In some embodiments of the first aspect of this application, the second locking mechanism further includes a torsion spring, which is sleeved on the eccentric shaft and spans across both sides of the second locking member along the thickness direction of the second locking member, so as to cooperate with the second locking member to form a lateral restoring force.

[0042] In some embodiments of the first aspect of this application, the torsion spring includes two winding portions located on both sides of the second locking member in the thickness direction and sleeved on the eccentric shaft, and a mating section connecting the two winding portions; the second locking member is provided with a groove that mates with the mating section, and the mating section is engaged in the groove to define the position of the torsion spring relative to the second locking member.

[0043] In some embodiments of the first aspect of this application, the second locking engagement portion includes a cylindrical portion that engages with the locking groove.

[0044] The second aspect of this application discloses a scooter including a first folding part, a second folding part, and a folder connecting the first folding part and the second folding part. The folder is configured as described in any example of the first aspect of this application. The first folding part is connected to the second folding part through the folder and is capable of switching between a folded state and an unfolded state relative to the second folding part.

[0045] In some examples disclosed in the second aspect of this application, the first fold is a riser assembly and the second fold is a frame.

[0046] In summary, the folding device and scooter using the same disclosed in this application, by having the first and second locking mechanisms cooperate with the same eccentric shaft and lock the first and second locking mating parts respectively, allows the same eccentric shaft to serve as a common motion transmission component between the first and second locking mechanisms. This not only transmits the rotation of the first locking mechanism but also converts the rotation into an eccentric motion that drives the second locking mechanism to unlock. While ensuring the folding device has a dual locking structure, it eliminates the need for multiple separate transmission components to establish a linkage between the two locking mechanisms, effectively reducing the number of parts, simplifying the overall structure, and lowering assembly complexity. Furthermore, in terms of linkage, when the first locking mechanism releases the lock of the first locking mating part and continues to rotate, the same eccentric shaft directly drives the second locking mechanism to release the lock of the second locking mating part, improving the continuity and convenience of the folding operation. Attached Figure Description

[0047] The specific features of the invention involved in this application are shown in the appended claims. The features and advantages of the invention can be better understood by referring to the exemplary embodiments and drawings described in detail below. A brief description of the drawings is as follows:

[0048] Figure 1 The diagram shown is a structural schematic of a scooter in one embodiment of this application.

[0049] Figure 2 and Figure 3 The diagrams shown are schematic representations of the folder in a locked state and an unlocked state in one embodiment of this application.

[0050] Figure 4 The diagram shown is a cross-sectional view of the folder in the locked state in one embodiment of this application.

[0051] Figure 5 The diagram shown is a schematic representation of the split structure of the folder in one embodiment of this application.

[0052] Figure 6 The diagram shown is a structural schematic of a first locking mechanism and a second locking mechanism in cooperation with an eccentric shaft in one embodiment of this application.

[0053] Figure 7 and Figure 8 The diagrams shown are schematic representations of the eccentric shaft components in different embodiments of this application.

[0054] Figure 9 The diagram shown is a partial schematic of the first locking mechanism in one embodiment of this application.

[0055] Figure 10The diagram shown is a structural schematic of the first locking member and the first locking mating part in a locked state in one embodiment of this application.

[0056] Figure 11 The diagram shown is a structural schematic of the first locking member and the first locking engagement part in the locked state in another embodiment of this application.

[0057] Figure 12 and Figure 13 The images shown are schematic diagrams of the second locking mechanism in one embodiment of this application from different perspectives.

[0058] Figure 14 The diagram shown is a structural schematic of the second locking mechanism and the second locking mating part in the locked state in one embodiment of this application.

[0059] Figure 15 The diagram shown is a structural schematic of a second locking mechanism disposed on a second connecting seat in one embodiment of this application.

[0060] Figure 16 The diagram shown is a schematic diagram of the structure of the mating hole in one embodiment of this application. Detailed Implementation

[0061] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand the advantages and technical effects of this application from the content disclosed in this specification. In the following description, some embodiments may be referenced to the accompanying drawings. It should be understood that other embodiments not shown in the drawings may also be used, and changes in specific structures, parts or mechanisms, components, and operations may be made without departing from the spirit and scope of this application. The following detailed description should not be considered limiting, and the scope of the embodiments of this application is limited only by the claims published in this application. The terminology used herein is for describing particular embodiments only and is not intended to limit this application.

[0062] It should be understood that although the terms first, second, or third, etc., may be used herein to describe various elements or parameters in some embodiments, these elements or parameters should not be limited by these terms. These terms are used only to distinguish one element or parameter from another, and not to define the order, priority, or importance of multiple elements. For example, a first connector may be referred to as a second connector, and similarly, a second connector may be referred to as a first connector, without departing from the scope of the various described embodiments.

[0063] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” and “including” indicate the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. For example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices. Additionally, the term “and / or,” which may be used hereinafter, describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, the character “ / ”, unless otherwise specified, generally indicates that the preceding and following related objects have an “and / or” relationship. Additionally, in the description of embodiments of this application, “multiple” refers to two or more. Furthermore, the terms “or” and “and / or” as used herein are interpreted as inclusive, or mean either one or any combination thereof. Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0064] It should also be understood that when an element, such as a layer, region, or substrate, is referred to as being "on" another element or extending "on" another element, the element may be directly on or directly extending onto the other element, or intermediate elements may be present. Conversely, when an element is referred to as being "directly on" another element or "directly extending onto" another element, no intermediate elements are present. It will also be understood that when an element is referred to as being "connected" or "attached" to another element, it may be directly connected or coupled to the other element, or intermediate elements may be present. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, no intermediate elements are present. Furthermore, the term "coupled" generally means physical, mechanical, magnetic, and / or electrical coupling or connection, and in the absence of specific contrasting language, the presence of intermediate elements between coupled or associated items is not excluded.

[0065] Relative terms such as “below,” “above,” “upper,” “lower,” “horizontal,” or “vertical” may be used herein to describe the relationship between one element, layer, or region and another element, layer, or region illustrated in the figures. It will be understood that these terms are intended to cover different device orientations other than those depicted in the figures. In this application, “vertical,” “horizontal,” and “parallel” are defined as including cases within ±10% of their standard definitions. For example, vertical typically refers to an angle of 90° relative to a reference line, but in this application, vertical refers to cases including those within 80° to 100°. Unless otherwise expressly stated, comparative quantitative terms (such as “above” and “below”) are intended to cover the concept of equality. As an example, “above” can mean not only “greater than” in a mathematical sense but also “equal to.”

[0066] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It will also be understood that terms used herein shall be interpreted as having the meaning consistent with their meaning in the context of this specification and the relevant field, and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0067] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments and technical effects obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application. The terms "an embodiment," "implementation," or similar wording used throughout this specification mean that a specific feature, structure, or characteristic described together with an implementation is included in at least one embodiment of the present application. Therefore, the appearance of the phrases "in an embodiment," "in an embodiment," and similar wording throughout this specification may (but does not necessarily) refer to the same implementation.

[0068] During the development of this application, the inventors further realized that the mass production applicability of a folding device depends not only on the reliability of the locking mechanism but also on whether the unlocking operation conforms to the operator's natural grip habits and the connection stability in the unfolded state. While some folding devices can improve security through two-stage locking, when the first unlocking element is located on the outside of the wrench, the operator typically needs to first flick or press the unlocking element in one direction with their fingers, and then turn the wrench in the other direction with their thumb or palm. Because the pressing direction of the unlocking element is inconsistent with the rotation direction of the wrench, the operator needs to perform force actions in different directions with the same hand, which can easily lead to an unstable grip posture, difficulty in unlocking, or the need for two-handed operation, thus affecting the ease of unlocking the folding device.

[0069] The inventors further recognized that, in its unfolded state, the folding mechanism not only needs to prevent the connecting seats from opening directly, but also needs to suppress the slight swaying of the first and second folding sections under riding vibrations, steering loads, and impact loads. Some folding mechanisms' second locking structure typically achieves locking through a unidirectional snap-fit ​​or hook-fit, resulting in a relatively singular locking force direction. When the folding mechanism is subjected to complex loads, slight gaps may still occur between the connecting seats at both ends in the axial or radial direction, leading to seat tube swaying, abnormal noise, or a decreased locking feel. Therefore, how to simplify the two-lock linkage structure while making the first unlocking operation more compatible with single-handed continuous operation, and how to enable the second locking structure to provide pre-tensioning and limiting in multiple directions, are the technical problems that this application further focuses on and aims to solve.

[0070] Based on the above understanding, this application discloses a folding mechanism and a scooter using the same. By having a first locking mechanism and a second locking mechanism cooperate with the same eccentric shaft and lock the first and second locking mating parts respectively, the same eccentric shaft serves as a common motion transmission component between the first and second locking mechanisms. It can transmit the rotation of the first locking mechanism and convert the rotation into an eccentric motion that drives the second locking mechanism to unlock. While ensuring the folding mechanism has a dual locking structure, it establishes a linkage between the two locking mechanisms without the need for multiple separate transmission components, thereby effectively reducing the number of parts, simplifying the overall structure, and reducing assembly complexity. Furthermore, in terms of the linkage, when the first locking mechanism releases the lock of the first locking mating part and continues to rotate, the same eccentric shaft can directly drive the second locking mechanism to release the lock of the second locking mating part, improving the continuity and convenience of the folding operation. The specific technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0071] To facilitate understanding of the technical solution of this application, unless otherwise stated, the "first folding part" referred to in this application can be the scooter's stem assembly or a component connected to the stem assembly, and the "second folding part" can be the scooter's frame, fork mounting seat, or a component connected to the frame; the "first connecting seat" and the "second connecting seat" are used to connect the first folding part and the second folding part, respectively, and do not limit their absolute vertical position in the actual vehicle.

[0072] In this application, "unfolded state" refers to the state in which the first folding part and the second folding part are held in a position suitable for normal vehicle riding by the folding mechanism; "folded state" refers to the state in which the first folding part is rotated relative to the second folding part to a position suitable for storage; unless otherwise stated, "locked state" refers to the state in which the first locking mechanism and the first locking engagement part form a locking engagement, and the second locking mechanism and the second locking engagement part form a locking engagement; "intermediate locked state" refers to the state in which the first locking mechanism has released its lock with the first locking engagement part, while the second locking mechanism still maintains a locking engagement with the second locking engagement part; "fully unlocked state" refers to the state in which both the first locking mechanism and the second locking mechanism have released their corresponding locking constraints, allowing the first connecting seat and the second connecting seat to fold relative to each other. When describing the locking or unlocking of a particular locking mechanism in this document, it only refers to the engagement state between that locking mechanism and the corresponding locking engagement part.

[0073] In this application, "inner side of the wrench" refers to the side of the wrench facing the first folding part, the first connecting seat, or the internal space of the folding device; "outer side of the wrench" refers to the side of the wrench away from the first folding part, the first connecting seat, or the internal space of the folding device.

[0074] In this application, "eccentricity" refers to the distance between the axis of the eccentric segment and the rotation axis of the transmission segment; "eccentric trajectory" refers to the motion trajectory of the eccentric segment relative to the second connecting seat when the eccentric shaft rotates around the rotation axis of the transmission segment.

[0075] In this application, "longitudinal reference line" refers to the reference line extending along the length of the first folding part in its unfolded state; "axial" refers to the direction along or parallel to the longitudinal reference line; "radial" refers to the radial direction relative to the longitudinal reference line; and "thickness direction" refers to the dimensional direction of the second locking member along the axial direction of the eccentric shaft. When the scooter is in its normal unfolded and riding posture, the direction toward the first folding part or the riser assembly can be referred to as "upper side" or "upward direction," and the direction toward the second folding part or the frame can be referred to as "lower side" or "downward direction." The above directional terms are used to indicate the relative positional relationship of the components in the installation posture shown in the drawings and do not become a limitation on the absolute direction of gravity due to changes in the overall posture of the scooter.

[0076] This application provides a scooter in some embodiments; please refer to [link / reference]. Figures 1 to 3 , Figure 1 The diagram shown is a structural schematic of a scooter in one embodiment of this application. Figure 2 and Figure 3 The following are schematic diagrams showing the folder in a locked and unlocked state in one embodiment of this application, respectively. Figure 1 As shown, the scooter 1 includes a first folding section 11, a second folding section 12, and a folding mechanism 13. The folding mechanism 13 connects the first folding section 11 and the second folding section 12, allowing the first folding section 11 to switch between an unfolded state and a folded state relative to the second folding section 12. In an embodiment, the position corresponding to the unfolded state can be referred to as the unfolded position, which corresponds to the folding mechanism 13 being in the following position: Figure 2 The locked state shown, the position corresponding to the folded state can be called the folded position, and the folder 13 is in the position shown. Figure 3 The unlocked state is shown.

[0077] Specifically, in such Figure 1 In the example shown, rotating the first folding portion 11 clockwise along the dashed arrow switches it from the unfolded state to the folded state, while rotating it counterclockwise along the dashed arrow switches it from the folded state to the unfolded state. In the unfolded state, it appears as follows: Figure 1 The first folding part 11 is in the state indicated by the dotted line, which in some embodiments may also be referred to as the upright state. The first folding part 11 is locked to the second folding part 12 through the folding device 13. The first folding part 11 remains in a vertical state, which can meet the normal riding needs of the scooter 1. In the folded state, it is as follows: Figure 1 The first folding part 11 is in the state shown by the solid line. The folding device 13 releases the lock between the first folding part 11 and the second folding part 12. The first folding part 11 rotates relative to the second folding part 12 to the folding position, thus presenting a folded state. In the folded state, the scooter 1 can maintain a relatively compact small volume shape, which makes it easy for users to store and handle, and at the same time improves the portability.

[0078] In one embodiment, the first folding portion 11 may correspond to the stem assembly of the scooter 1, and the second folding portion 12 may correspond to the frame of the scooter 1. For example, the stem assembly includes a stem body 110 and a handle portion 111 disposed on the upper side of the stem body 110, and the lower end of the stem body 110 is connected to the folding device 13. The frame includes a footboard portion 120 for supporting the operator to stand on and a mounting bracket 121 disposed at the front end of the footboard portion 120, and the upper end of the mounting bracket 121 is connected to the folding device 13.

[0079] Please see Figures 2 to 4 , Figure 4The diagram shown is a cross-sectional schematic of the folder in the locked state in one embodiment of this application, as follows: Figures 2 to 4 As shown, the folding device 13 includes a first connecting seat 14, a second connecting seat 15, a first locking mechanism 16, and a second locking mechanism 17. The first connecting seat 14 is used to connect the first folding part 11, and the second connecting seat 15 is used to connect the second folding part 12. The second connecting seat 15 is also rotatably connected to the first connecting seat 14. The first connecting seat 14 is provided with a first locking engagement part 140 and a second locking engagement part 141. The first locking mechanism 16 and the second locking mechanism 17 are both provided on the second connecting seat 15. The first locking mechanism 16 cooperates with the first locking engagement part 140, and the second locking mechanism 17 cooperates with the second locking engagement part 141 to lock the first connecting seat 14 and the second connecting seat 15 in the unfolded state, that is, to lock the first folding part 11 and the second folding part 12 in the unfolded state. The first locking engagement portion 140 and the second locking engagement portion 141 may also be provided on the first folding portion 11, or they may be provided on both the first connecting seat 14 and the first folding portion 11. For example, when the first connecting seat 14 and the first folding portion 11 are connected together, they have an overlapping portion. The first locking engagement portion 140 and the second locking engagement portion 141 can be used as the installation area for installation.

[0080] In one embodiment, the first connecting seat 14 can be integrally formed with the first folding portion 11, or it can be fixed to the first folding portion 11 by means of welding, threaded connection, clamping connection, press-fit connection, or fastener connection; similarly, the second connecting seat 15 can be integrally formed with the second folding portion 12 or detachably connected. The first locking engagement portion 140 and the second locking engagement portion 141 can be set as independent components, or they can be jointly set on a mounting bracket, locking post seat, or integrated mounting component. Thus, different integration and assembly methods can be selected according to the structure of the frame and riser assembly.

[0081] In one embodiment, the first connecting seat 14 and the second connecting seat 15 are rotatably connected, allowing the first connecting seat 14 to rotate relative to the second connecting seat 15 between an unfolded position and a folded position. When the first connecting seat 14 is rotated to the unfolded position, the first locking mechanism 16 engages with the first locking engagement part 140, and the second locking mechanism 17 engages with the second locking engagement part 141, thereby locking the first connecting seat 14 and the second connecting seat 15 in the unfolded state (as shown in the image). Figure 2 (As shown in the diagram). When the first locking mechanism 16 and the second locking mechanism 17 are released, the first connecting seat 14 can rotate relative to the second connecting seat 15 (as shown in the diagram). Figure 3(as shown in the figure), thereby causing the first folding part 11 to switch from an unfolded state to a folded state relative to the second folding part 12.

[0082] In one embodiment, the first connecting seat 14 and the second connecting seat 15 are rotatably connected by a hinge structure. The hinge structure includes hinge portions respectively disposed on the first connecting seat 14 and the second connecting seat 15, and a pivot shaft passing through the hinge portions, so that the first connecting seat 14 can rotate relative to the second connecting seat 15 about the pivot shaft. Of course, in other embodiments, the first connecting seat 14 and the second connecting seat 15 can also be connected by a pin, a pivot shaft, or other connection structure capable of relative rotation, and this application does not limit this.

[0083] By setting the first connecting seat 14 and the second connecting seat 15 as a hinged connection, the folder 13 can provide a stable folding rotation center while bearing the connecting load between the first folding part 11 and the second folding part 12. In the unfolded state, the first locking mechanism 16 and the second locking mechanism 17 are respectively located in the locking position on the opposite side of the hinged structure, which can form a multi-point constraint together with the hinged structure, thereby improving the anti-shaking ability of the folder 13 in the unfolded state.

[0084] Please see Figures 2 to 8 , Figure 5 The diagram shown is a schematic representation of the disassembled structure of the folder in one embodiment of this application. Figure 6 The diagram shown is a structural schematic of a first locking mechanism and a second locking mechanism cooperating with an eccentric shaft in one embodiment of this application. Figure 7 and Figure 8 The following are schematic diagrams of the eccentric shaft component in different embodiments of this application. Further, as shown... Figures 2 to 8 As shown, both the first locking mechanism 16 and the second locking mechanism 17 are coupled to the same eccentric shaft 18 and disposed on the second connecting seat 15. The eccentric shaft 18 has a transmission section 180, an eccentric section 181, and a support section 182 sequentially formed along its own axial direction. The transmission section 180, the eccentric section 181, and the support section 182 are integrally formed or fixedly connected as one unit. The transmission section 180 and the support section 182 are rotatably supported on the second connecting seat 15. The second locking mechanism 17 is coupled to the eccentric section 181, and the first locking mechanism 16 is connected to the transmission section 180. When the first locking mechanism 16 unlocks from the first locking engagement part 140 and continues to rotate, the transmission section 180 drives the eccentric shaft 18 to rotate, causing the eccentric section 181 to move along an eccentric trajectory. During the movement, the second locking mechanism 17 moves in a direction away from the second locking engagement part 141, thereby releasing the lock between it and the second locking engagement part 141.

[0085] In this embodiment, the eccentric shaft 18 serves as a common motion transmission component between the first locking mechanism 16 and the second locking mechanism 17. On one hand, it receives the rotational force transmitted by the first locking mechanism 16 and converts this force into the eccentric motion of the eccentric segment 181, thereby driving the second locking mechanism 17 to operate and achieving linkage unlocking between the first locking mechanism 16 and the second locking mechanism 17. Thus, the eccentric shaft 18 simultaneously undertakes the torque input of the first locking mechanism 16, the eccentric drive of the second locking mechanism 17, and the support and positioning functions at both ends. Compared with structures that separately set a rotating shaft, an eccentric wheel, and an intermediate linkage component, this reduces the number of independent parts and assembly positioning steps, lowers the risk of linkage jamming caused by the superimposed assembly errors of multiple parts, and facilitates the miniaturization and mass assembly of the folding device 13.

[0086] In embodiments where the transmission section 180, the eccentric section 181, and the support section 182 can be integrally formed, they can be integrally machined, for example, by turning, forging, precision casting, or powder metallurgy. In embodiments where the transmission section 180, the eccentric section 181, and the support section 182 are fixedly connected as one unit, this fixed connection means that the connected parts can function as a single unit and rotate synchronously (i.e., they do not rotate relative to each other during normal use). For example, the transmission section 180, the eccentric section 181, and the support section 182 can be machined separately and then integrated through interference fit, welding, pinning, keying, threading, gluing, or other fixed connection methods.

[0087] The eccentric shaft 18 is formed in sequence along its axial direction by a transmission section 180, an eccentric section 181, and a support section 182. This means that the transmission section 180, the eccentric section 181, and the support section 182 are arranged sequentially along the axial extension direction of the eccentric shaft 18 and together constitute the eccentric shaft 18, but does not mean that the transmission section 180, the eccentric section 181, and the support section 182 have the same central axis. Specifically, as shown... Figure 7 and Figure 8 As shown, the axis of the eccentric segment 181 is eccentrically positioned relative to the axis of the transmission segment 180 to form an eccentric trajectory required to drive the second locking mechanism 17. The support segment 182 may be coaxially positioned with the eccentric segment 181 and may be further configured to extend from the eccentric segment 181 to facilitate the fitting and assembly of the first locking mechanism 16 and the second locking mechanism 17. Of course, in other embodiments, the axis of the support segment 182 may also coincide with that of the transmission segment 180. This application does not limit this, as long as the eccentric segment 181 is eccentrically positioned relative to the transmission segment 180.

[0088] If the eccentricity of the eccentric segment 181 relative to the transmission segment 180 is too small, the stroke of the eccentric segment 181 driving the second locking mechanism 17 will be insufficient, which is not conducive to the reliable unlocking of the second locking mechanism 17. If the eccentricity is too large, it will easily increase the impact during the movement of the second locking mechanism 17 and increase the overall structural size of the folder. Therefore, in this embodiment, the axis of the eccentric segment 181 is preferably offset relative to the axis of the transmission segment 180 by any value between 2.0mm and 3.0mm. For example, it can be set to 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3.0mm. It is particularly preferred to be 2.5mm to balance the unlocking stroke of the second locking mechanism 17, the smoothness of movement, and the compactness of the overall structure of the folder.

[0089] In some embodiments, the eccentric shaft 18 is further provided with an axial limiting structure for restricting its axial movement relative to the second connecting seat 15. The axial limiting structure may include a flange, shoulder, or enlarged head formed at the end of the transmission section 180, and at least one of a retaining ring, retaining ring, end cap, fastening nut, or limiting pin disposed at one end of the support section 182. The eccentric shaft 18 is maintained in a predetermined axial position between the first locking mechanism 16, the second locking mechanism 17, and the second connecting seat 15 by the axial limiting structures at both ends, while allowing the eccentric shaft 18 to rotate about the rotation axis of the transmission section 180.

[0090] Furthermore, since in some embodiments the support section 182 is coaxially arranged with the eccentric section 181, the axis of the support section 182 is also offset from the axis of the transmission section 180. Since the eccentric shaft 18 is supported on the second connecting seat 15 through the transmission section 180 and the support section 182 respectively, if the support axes at both ends of the eccentric shaft 18 are not coaxial, the eccentric shaft 18 will experience problems such as swaying and jamming during rotation, affecting the linkage stability between the first locking mechanism 16 and the second locking mechanism 17.

[0091] Therefore, in one embodiment, the support position of the support section 182 is corrected by adjusting the support member, so that the eccentric shaft 18 forms a support axis consistent with the transmission section 180. For example... Figure 5 and Figure 6 As shown, the support section 182 passes through the correction support member 19, which is rotatably mounted on the second connecting seat 15. The rotation axis of the correction support member 19 is coaxial with the rotation axis of the transmission section 180. By setting the correction support member 19, the support position of the support section 182 relative to the second connecting seat 15 can be corrected, so that the eccentric shaft 18 forms a consistent support axis at the transmission section 180 and the support section 182, thereby ensuring improved rotational stability of the eccentric shaft 18.

[0092] In one embodiment, the transmission section 180 and the correction support 19 can be directly supported in the support hole formed in the second connecting seat 15, or they can be installed in the second connecting seat 15 through a sliding bushing, wear-resistant bushing, rolling bearing, or other rotatable support structure. This reduces friction and axial movement during the rotation of the eccentric shaft 18, maintaining a stable mating position between the transmission section 180, the eccentric section 181, and the second locking member 171.

[0093] It should be understood that the setting of the correction support 19 is only one example. In other embodiments, when the support section 182 is coaxially arranged with the transmission section 180, or when the second connecting seat 15 itself forms a support hole that can coaxially cooperate with the support section 182, the correction support 19 can also be omitted, so that the support section 182 is directly and rotatably supported on the second connecting seat 15. With this modified structure, the number of parts can be further reduced without the need for additional correction.

[0094] Furthermore, to prevent relative rotation between the correction support 19 and the eccentric shaft 18 after correction is completed, in some embodiments, such as... Figure 5 , Figure 7 and Figure 8 As shown, the outer periphery of the support segment 182 has a non-circular fit structure, and the correction support 19 has a mounting hole adapted to the non-circular fit structure. When the two fit together, they can restrict the relative rotation between the support segment 182 and the correction support 19, so that when the eccentric shaft 18 rotates (that is, when the support segment 182 rotates), it can drive the correction support 19 to rotate synchronously. For example, the non-circular fit structure can be configured as a plane formed by cutting, a D-shaped surface, a double plane, a polygonal shaft segment, a spline segment, a keyway structure, a flat structure, or other irregularly shaped structures that can restrict circumferential rotation. This application does not limit this.

[0095] To ensure that the first locking mechanism 16 reliably transmits rotational power to the eccentric shaft 18 and avoids relative rotation during long-term use, which could lead to unstable power transmission, in one embodiment, the transmission section 180 is provided with a transmission engagement structure, and the first locking mechanism 16 is provided with a transmission structure that engages with the transmission engagement structure. This restricts relative rotation between the first locking mechanism 16 and the transmission section 180, enabling the first locking mechanism 16 to reliably drive the transmission section 180 of the eccentric shaft 18 to rotate synchronously.

[0096] In one embodiment, such as Figure 7As shown, the transmission engagement structure includes a transmission engagement groove 1800 formed on the transmission section 180. The first locking mechanism 16 is provided with a transmission rod, which at least partially extends into the transmission engagement groove to restrict relative rotation between the first locking mechanism 16 and the transmission section 180, thereby achieving synchronous transmission between the two. In some examples, such as... Figure 7 As shown, the transmission mating groove 1800 is recessed on the outer peripheral surface of the transmission section 180, and the transmission mating groove 1800 has an outward opening in the radial direction of the transmission section 180 to form a space for at least part of the transmission rod to extend into.

[0097] Correspondingly, such as Figure 5 As shown, the first locking mechanism 16 has a mounting opening 160 at one end near the transmission section 180, and a transmission rod is installed in the mounting opening 160. When the first locking mechanism 16 is sleeved on the transmission section 180, the transmission rod at least partially extends into the transmission mating groove 1800 to restrict the circumferential relative rotation between the first locking mechanism 16 and the transmission section 180, so that the rotational force of the first locking mechanism 16 can be reliably transmitted to the eccentric shaft 18. Further, the transmission rod can be formed by a pin, cylindrical pin, roller or other rod-shaped structure and fixedly installed on the first locking mechanism 16.

[0098] In another embodiment, such as Figure 8 As shown, the transmission engagement structure includes at least one protrusion 1801 formed on the outer periphery of the transmission section 180, and the first locking mechanism 16 forms a mating groove adapted to the protrusion. In this embodiment, the protrusions 1801 are preferably arranged in multiples at intervals along the circumference of the transmission section 180, such as two, three, four, five, or six. Correspondingly, the first locking mechanism 16 forms a mating groove corresponding to each protrusion 1801. When the first locking mechanism 16 is sleeved on the transmission section 180, each protrusion 1801 is embedded in the corresponding mating groove to restrict the circumferential relative rotation between the first locking mechanism 16 and the transmission section 180, so that the first locking mechanism 16 can drive the eccentric shaft 18 to rotate synchronously. The multiple protrusions 1801 are distributed circumferentially, which can increase the contact area between the two, make the transmitted torque more uniform, reduce local force concentration, and improve the stability and service life of the transmission connection.

[0099] Of course, the transmission fit structure and transmission structure are not limited to the two forms mentioned above. They can also adopt keyways, splines, square shafts, irregular shafts, or other fit methods that can restrict the relative rotation between the first locking mechanism 16 and the eccentric shaft 18 and realize torque transmission. This application does not limit this.

[0100] In one embodiment, such as Figures 3 to 5As shown, the first locking mechanism 16 includes a wrench 161 connected to the eccentric shaft 18 and a first locking member 162 movably disposed inside the wrench 161, so that when the operator holds the wrench 161, he / she presses the first locking member 162 to release the lock with the first locking engagement part 140, and continues to operate the wrench 161 to rotate while maintaining the grip. Further, an elastic member 163 is also provided between the first locking member 162 and the wrench 161. The elastic member 163 is disposed along the pressing direction of the first locking member 162. When the first locking member 162 moves along the pressing direction, the elastic member 163 is compressed, causing the first locking member 162 to release the lock with the first locking engagement part 140; when the first locking member 162 is released, the elastic member 163 causes the first locking member 162 to reset.

[0101] Specifically, the first locking member 162 is disposed on the inner side of the wrench 161 and is located at a position where the operator's fingers can naturally contact it when holding the wrench 161. When it is necessary to release the locking of the first locking mechanism 16, the operator maintains a grip on the wrench 161 and uses their fingers to... Figure 3 The dashed arrow indicates the pressing direction, pressing the first locking member 162 causes it to compress the elastic member 163 and release the lock between it and the first locking engagement part 140. Subsequently, without adjusting the grip, continue applying rotational force to the wrench 161, causing the wrench 161 to move along... Figure 3 The rotation direction indicated by the dashed arrow drives the eccentric shaft 18 to rotate, which in turn drives the second locking mechanism 17 to perform subsequent unlocking actions. When locking is required, when the operator releases the first locking member 162, the elastic member 163 releases its elastic restoring force, pushing the first locking member 162 back to its initial position, allowing it to re-lock with the first locking engagement part 140. In some embodiments, the elastic member 163 can be a compression spring, torsion spring, leaf spring, elastic block, or other elastic structure capable of providing a restoring force to the first locking member 162. The elastic member 163 can be arranged along the pressing direction of the first locking member 162, or it can convert its elastic restoring force into a restoring movement of the first locking member 162 along the pressing direction by abutting a ramp, guide post, or limiting groove.

[0102] In some embodiments, the wrench 161 has a guide cavity, guide groove, or guide hole extending along the pressing direction of the first locking member 162, and the first locking member 162 is at least partially accommodated within the guide cavity, guide groove, or guide hole. The first locking member 162 may be provided with a guide rib, guide block, guide pin, or sliding surface that cooperates with the wrench 161 to limit unintended rotation or lateral displacement of the first locking member 162 relative to the wrench 161.

[0103] An anti-disengagement limiting structure can also be provided between the wrench 161 and the first locking member 162. This anti-disengagement limiting structure includes at least one of a limiting shoulder, a stop boss, a latch, a limiting pin, or a cover plate, used to limit the maximum pressing stroke and maximum reset stroke of the first locking member 162. This allows the first locking member 162 to move stably along a preset pressing direction, reducing the possibility of the first locking member 162 tilting, jamming, or disengaging from the wrench 161.

[0104] In this embodiment, since both the pressing operation of the first locking member 162 and the rotating operation of the wrench 161 can be completed continuously in the same grip posture, the entire unlocking process can be completed without repeatedly adjusting the grip position or using both hands. At the same time, the operator can directly use the lever arm of the wrench 161 to complete the subsequent rotation, reducing the operating force required to complete the unlocking and improving the ease of operation and user experience of the folding device 13.

[0105] In one embodiment, please refer to Figure 9 The image shown is a partial schematic diagram of the first locking mechanism in one embodiment of this application, as follows: Figure 9 As shown, the first locking member 162 includes a pressing portion 1620 and a locking portion 1622 located below the pressing portion 1620 to engage with the first locking engagement portion 140. Further, the first locking member 162 has an upper abutment plate 1623 on the side facing the wrench 161, and a corresponding lower abutment plate 1610 on the wrench 161. One end of the elastic member 163 abuts against the upper abutment plate 1623, and the other end abuts against the lower abutment plate 1610. When the operator presses the pressing portion 1620, the first locking member 162 moves relative to the wrench 161, causing the upper abutment plate 1623 to move closer to the lower abutment plate 1610, thereby compressing the elastic member 163. When the pressing portion 1620 is released, the elastic member 163 releases its elastic restoring force to push the first locking member 162 back to its original position.

[0106] In one embodiment, the pressing portion 1620 has a beveled structure 1621 inclined outward toward the wrench 161 to facilitate placement and pressing by the operator. That is, the beveled structure 1621 extends obliquely outward relative to the body of the wrench 161, causing the pressing portion 1620 to extend at least partially outward toward the wrench 161 to form a pressing surface for the operator's fingers. This allows the operator to naturally place their fingers on the beveled structure 1621 when holding the wrench 161 and apply pressing force along the normal direction of the beveled structure 1621 to release the lock between the locking portion 1622 and the first locking engagement portion 140.

[0107] Furthermore, the upper surface of the inclined structure 1621 has anti-slip texture, which can be configured as multiple ribs spaced apart along the width direction of the pressing part 1620, thereby increasing the friction between the finger and the pressing part 1620, improving the stability during pressing, and preventing slippage during operation.

[0108] Correspondingly, such as Figure 9 As shown, the wrench 161 is provided with a beveled receiving space 1611 adapted to the beveled structure 1621. When not pressed, the beveled structure 1621 at least partially protrudes from the beveled opening of the beveled receiving space 1611. For example, the beveled receiving space 1611 can be formed by an inwardly recessed end of the wrench 161, with its beveled opening facing the beveled structure 1621 of the pressing part 1620. The beveled receiving space 1611 can provide a pressing stroke for the pressing part 1620. Specifically, in the unpressed state, the beveled structure 1621 at least partially protrudes beyond the beveled opening of the beveled receiving space 1611, allowing the operator to quickly position the pressing part 1620. When the pressing part 1620 is subjected to pressing force, the pressing part 1620 can enter the beveled receiving space 1611 along the pressing direction, thus balancing operational convenience and structural compactness.

[0109] Please see Figure 10 The diagram shows a schematic representation of the structure of the first locking member and the first locking mating part in a locked state in one embodiment of this application. Figure 10 As shown, the first locking member 162 is provided with a locking hole 1624, and the first locking engagement part 140 passes through the locking hole 1624. When the axis of the locking hole 1624 is offset from the axis of the first locking engagement part 140, the hole wall of the locking hole 1624 limits the first locking engagement part 140 to form a locking engagement. When the first locking member 162 is pressed, the locking hole 1624 moves to be aligned with the first locking engagement part 140, so as to allow the first locking engagement part 140 to pass through the locking hole 1624 and thus release the lock.

[0110] In one embodiment, such as Figure 10As shown, the first locking engagement portion 140 includes a locking rod 1400 for mounting on the first connecting seat 14 and a locking head 1401 formed at the end of the locking rod 1400. The locking rod 1400 is used to fix the first locking engagement portion 140 to the first connecting seat 14. For example, the locking rod 1400 has a threaded portion and is fixed to the first connecting seat 14 by threaded engagement. The locking head 1401 has a larger external dimension than the locking rod 1400 to form a locking structure that mates with the locking hole 1624. Correspondingly, the locking hole 1624 is further located on the locking portion 1622 of the first locking member 162, and the diameter of the locking hole 1624 is larger than the outer diameter of the locking rod 1400 and the outer diameter of the locking head 1401 to facilitate the entry and exit of the first locking engagement portion 140.

[0111] Specifically, when the first locking member 162 is not pressed, the first locking member 162 maintains its initial position under the action of the elastic member 163. At this time, the central axis of the locking hole 1624 and the central axis of the lock head 1401 have a preset offset, that is, the two are in an offset state. In this state, the radially protruding limiting part 1402 formed by the lock head 1401 relative to the lock rod 1400 can abut against the hole wall of the locking hole 1624, so that the hole wall of the locking hole 1624 can block the lock head 1401 or the limiting part 1402 from passing through the locking hole 1624, thereby restricting the first locking engagement part 140 from disengaging from the first locking member 162, thereby forming a lock. When the operator presses the first locking member 162, the first locking member 162 moves in the pressing direction and drives the locking hole 1624 to move synchronously, so that the central axis of the locking hole 1624 is basically coincident with the central axis of the locking rod 1400, that is, the locking hole 1624 moves to a position aligned with the first locking engagement part 140. At this time, the limiting part 1402 formed on the lock head 1401 moves away from the hole wall to the corresponding locking hole 1624. The hole wall can no longer block the limiting part 1402, so the locking rod 1400 can pass through the locking hole 1624, causing the first locking member 162 to disengage from the limiting part of the lock head 1401, thereby releasing the lock between the first locking member 162 and the first locking engagement part 140. Through the offset locking and alignment unlocking between the locking hole 1624 and the first locking engagement part 140, the first locking member 162 can complete the locking state switching with only a small linear pressing stroke. The structure is compact and suitable for placement inside the wrench 161. At the same time, the locking hole 1624 forms a mechanical limit through the hole wall when not pressed, which does not rely on the operator's continuous force and can reduce the risk of mis-locking.

[0112] In some embodiments, the lock head 1401 has a tapered surface, a guide ramp, or a guide arc surface on the side facing the first locking member 162. When the wrench 161 rotates in the locking direction, the guide surface can contact the first locking member 162 or the wall of the locking hole 1624, and push the first locking member 162 to temporarily move in the pressing direction against the restoring force of the elastic member 163. After the lock head 1401 passes through the locking hole 1624 and reaches the locked position, the first locking member 162 resets under the action of the elastic member 163, so that the wall of the locking hole 1624 re-establishes a limit with the limiting part 1402. With this structure, the first locking mechanism 16 can automatically or semi-automatically complete the locking when the wrench 161 rotates to the locked position.

[0113] Please see Figure 11 The image shows a schematic diagram of the structure of the first locking member and the first locking mating part in the locked state in another embodiment of this application, as shown below. Figure 11 As shown, the first locking member 162 is provided with a locking hook portion 1625. The locking hook portion 1625 is hooked with the first locking engagement portion 140 to form a locking engagement. When the first locking member 162 is pressed, the locking hook portion 1625 moves along the pressing direction with the first locking member 162 and disengages from the first locking engagement portion 140 to release the lock between the first locking member 162 and the first locking engagement portion 140.

[0114] In one embodiment, such as Figure 11 As shown, the first locking engagement portion 140 includes a engaging hook portion 1403, which can be installed on the first connecting seat 14 by threaded connection, interference fit, welding, or other fixing methods. The engaging hook portion 1403 is located on the side of the first connecting seat 14 facing the first locking member 162, and forms a curved or arc-shaped hook profile on the side near the locking hook portion 1625 to form a locking structure that hooks with the locking hook portion 1625. Correspondingly, the locking hook portion 1625 may have an arc-shaped inner surface that matches the engaging hook portion 1403, so that the two overlap each other along their arc-shaped profiles in the locked state. Thus, the engaging hook portion 1403 can restrict the movement of the locking hook portion 1625 in the disengagement direction, thereby keeping the first locking member 162 in the locked position.

[0115] Specifically, when the first locking member 162 is not pressed, it remains in its initial position under the restoring force of the elastic member 163. At this time, the locking hook 1625 and the mating hook 1403 hook each other to form a mutual engagement, preventing the first locking member 162 from moving relative to the first locking engagement part 140 in the unlocking direction, thus locking. When the operator presses the first locking member 162, it moves in the pressing direction, causing the locking hook 1625 to move synchronously. As the locking hook 1625 gradually moves out of the hooking range of the mating hook 1403, the mutual engagement between them is released. When the locking hook 1625 completely passes over the mating hook 1403, the first locking member 162 is no longer restricted by the first locking mating part 140, thereby releasing the lock between the two. Through the hooking and engagement of the locking hook 1625 and the mating hook 1403, a larger overlap area and a clearer mechanical stop relationship can be formed, which can improve the holding ability of the first locking mechanism 16 in a vibration environment. At the same time, by pressing the first locking member 162 to disengage the locking hook 1625 from the mating hook 1403 in the pressing direction, the unlocking action can be maintained in a continuous manner with the rotation operation of the wrench 161.

[0116] It should be noted that the locking mechanism between the first locking member 162 and the first locking mating part 140 in this application is not limited to... Figure 10 and Figure 11 The embodiment shown is illustrated. In other embodiments, the first locking member 162 and the first locking engagement portion 140 may also employ other engagement structures capable of locking and unlocking, such as snap-fit ​​engagement, plug-in engagement, limit engagement, or other mechanical locking structures. Any mechanism that can form a locking constraint when the first locking member 162 is in the locked position and release the locking constraint after pressing the first locking member 162 to allow the first locking mechanism to continue performing subsequent unlocking actions is applicable to this application, and this application does not limit it in this regard.

[0117] Please see Figures 12 to 14 , Figure 12 and Figure 13 The following are schematic diagrams of the second locking mechanism in one embodiment of this application from different perspectives. Figure 14 The diagram shown is a structural schematic of the second locking mechanism and the second locking mating part in the locked state in one embodiment of this application. Figures 12 to 14As shown, the second locking mechanism 17 includes a second locking member 171 and a locking rod 172. The second locking member 171 has a locking groove 170 for the second locking engagement portion 141 to enter or disengage relative to each other. The locking rod 172 extends at least partially into the locking groove 170 so that it abuts against the second locking engagement portion 141 after the second locking engagement portion 141 enters the locking groove 170 relative to each other to form a lock. As described in the previous embodiment, when the first locking mechanism 16 is unlocked from the first locking engagement portion 140 and continues to rotate, the transmission section 180 can drive the eccentric section 181 to move along an eccentric trajectory. The movement of the eccentric section 181 along the eccentric trajectory can drive the second locking member 171 to move, so that the locking rod 172 releases the locking effect on the second locking engagement portion 141, allowing the second locking engagement portion 141 to disengage relative to each other from the locking groove 170.

[0118] In one embodiment, the eccentric segment 181 is located below the transmission segment 180 in the locked state, such that the eccentric segment is located at a relatively low position on the eccentric trajectory (i.e., subsequent movement will cause the movement of the eccentric segment 181 to include an upward component movement). Preferably, the eccentric segment 181 may be located at the lowest position on the eccentric trajectory. Specifically, when the eccentric shaft 18 rotates with the first locking mechanism 16, the movement of the eccentric segment 181 along the eccentric trajectory is a movement from the lower side to the upper side while following the rotation of the transmission segment 180. That is, when the eccentric shaft 18 begins to rotate, the movement of the eccentric segment 181 includes an upward component movement, which will drive the second locking member 171 to produce at least an upward component movement, thereby releasing the locking constraint of the locking rod 172 on the second locking engagement portion 141. The second locking engagement portion 141 can then be converted to a state that allows disengagement, creating conditions for the second locking member 171 to continue rotating and for the second locking engagement portion 141 to relatively disengage from the locking groove 170. In this embodiment, the initial position of the eccentric segment 181 is set below the transmission segment 180. This allows the eccentric movement to give the second locking member 171 an increased motion component, thereby enabling a phased unlocking process where the locking is first released and then disengaged from the locking groove. This reduces unlocking resistance and improves the smoothness and reliability of the unlocking process. When the eccentric segment 181 is at or near the lowest position of the eccentric trajectory in the locked state, the lever arm between the reaction force of the second locking member 171 acting on the eccentric segment 181 and the rotation axis of the transmission segment 180 is small, and the reverse rotation torque of the eccentric shaft 18 generated by this reaction force is correspondingly small. Therefore, this relatively low position not only facilitates the formation of an upward motion component in the initial stage of unlocking but also reduces the tendency of the eccentric shaft 18 to rotate unexpectedly under vibration or impact loads, which is beneficial for maintaining the locking stability of the second locking mechanism 17.

[0119] In one embodiment, such as Figure 14As shown, the first folding portion has a longitudinal reference line L extending along its length in the unfolded state. The axis of the locking rod 172 is inclined relative to the longitudinal reference line L, so that when the locking rod 172 abuts against the second locking engagement portion 141, it generates a radial locking force F1 and an axial locking force F2 along the first folding portion, respectively restricting the movement of the second locking engagement portion 141 in the corresponding directions. That is, this inclined arrangement of the locking rod 172 can form an oblique abutment with the second locking engagement portion 141. The resulting radial locking force F1 is used to restrict the second locking engagement portion 141 from displacing relative to the second locking member 171 in the radial direction of the first folding portion 11, and the resulting axial locking force F2 is used to restrict the second locking engagement portion 141 from displacing relative to the second locking member 171 in the axial direction of the first folding portion 11. This allows the second connecting seat 15 and the first connecting seat 14 to maintain a stable locked state in both the radial and axial directions, reducing the possibility of wobbling or gaps in the unfolded state of the folding device 13 and improving the riding stability of the scooter. One end of the locking rod 172 extending into the locking groove 170 can form a pressure-bearing end for abutting against the second locking engagement part 141. The pressure-bearing end can be a plane, arc surface, spherical surface, conical surface, rolling element, or contact surface with wear-resistant inserts perpendicular to the axis of the locking rod 172. The locking rod 172 applies an oblique locking force to the second locking engagement part 141 through the pressure-bearing end. The oblique locking force has at least a major component transmitted along the axis of the locking rod 172 and can be decomposed into a locking component F1 along the radial direction of the first folding part 11 and a locking component F2 along the axial direction of the first folding part 11.

[0120] In order to balance radial and axial locking forces to achieve better locking stability and smooth unlocking of the second locking mechanism, in one embodiment, such as Figure 14 As shown, the axis of the locking rod 172 is inclined at an angle α relative to the longitudinal reference line L, ranging from 20° to 24°. For example, it can be set to 20°, 20.5°, 21°, 21.5°, 22°, 22.5°, 23°, 23.5°, or 24°. Preferably, it can be set to 22°. When the inclination angle α is less than 20°, the radial component of the force of the locking rod 172 in the first folding part 11 is relatively small, and the constraint ability on the radial gap between the first connecting seat 14 and the second connecting seat 15 may be insufficient. When the inclination angle α is greater than 24°, the axial component of the force of the locking rod 172 in the first folding part 11 is relatively reduced, and the lateral compression and sliding friction between the locking rod 172 and the second locking mating part 141 may increase, resulting in an increase in the unlocking operation force. Therefore, setting the inclination angle α to 20° to 24° can achieve a balance between radial locking ability, axial locking ability, and unlocking smoothness.

[0121] In one embodiment, such as Figures 12 to 14 As shown, the locking rod 172 is rotatably disposed on the second locking member 171, and its length extending into the locking groove 170 can be adjusted by rotation to adjust the locking position between the locking rod 172 and the second locking engagement part 141. In some examples, the second locking member 171 is provided with a mounting hole, and the locking rod 172 can form a threaded engagement with the mounting hole. At least one end of the locking rod 172 is provided with a driving part for the action of an adjustment tool, such as an internal hexagonal hole, a cross groove, a slotted slot, an external hexagonal part, or other driving structures that can allow the tool to apply force. The operator can adjust the extension length of the locking rod 172 by rotating the locking rod 172 with an adjustment tool.

[0122] Specifically, after prolonged use of the folding device 13, if the locking gap increases due to wear of the locking rod 172, the second locking engagement part 141, or the second locking member 171, the locking rod 172 can be rotated to extend further into the locking groove 170 to compensate for the gap caused by wear. Conversely, if the fit between the locking rod 172 and the second locking engagement part 141 is too tight, the length of the locking rod 172 extending into the locking groove 170 can be reduced by rotating the locking rod 172 in the opposite direction to improve the unlocking operation feel, increase the service life and assembly adaptability of the second locking mechanism 17. In some embodiments, an anti-loosening structure can also be provided between the locking rod 172 and the second locking member 171. The anti-loosening structure includes at least one of the following: a locking nut, a locking washer, an elastic washer, threaded adhesive, a nylon anti-loosening layer, a locking pin, or a set screw. By setting an anti-loosening structure, the locking rod 172 can be prevented from rotating due to vibration after the insertion length adjustment is completed, thereby maintaining a stable locking position.

[0123] In one embodiment, such as Figures 12 to 14 As shown, the second locking member 171 is provided with a toggle part 1710 located on the movement path of the first locking mechanism 16. Furthermore, the toggle part 1710 is located on the movement path of the wrench 161. When the first locking mechanism 16 releases the lock between itself and the first locking engagement part 140 and continues to rotate, it abuts against the toggle part 1710. It can also push the toggle part 1710 through continuous rotation, thereby driving the second locking member 171 to rotate, so that the second locking engagement part 141 is relatively disengaged from the locking groove 170.

[0124] In the locked state, a preset gap or preset free stroke can be formed between the wrench 161 and the actuating part 1710. When the wrench 161 begins to rotate in the unlocking direction, the eccentric section 181 first drives the second locking member 171 to move upward, thereby reducing or releasing the clamping force of the locking rod 172 on the second locking engagement part 141. When the wrench 161 continues to rotate to the preset angle, the wrench 161 then abuts against the actuating part 1710 and pushes the second locking member 171 to rotate, causing the second locking engagement part 141 to disengage from the locking groove 170. This avoids the wrench 161 directly forcing the second locking member 171 to rotate when the second locking engagement part 141 is still under a large clamping force, reducing unlocking resistance and component wear.

[0125] In other embodiments, the wrench 161 and the actuating part 1710 may also be in contact with each other in the initial state, and the offset movement and rotation of the second locking member 171 may be carried out in accordance with a preset sequential relationship or a partial overlapping relationship by setting the contour and phase of the eccentric section 181 and the actuating part 1710.

[0126] In one embodiment, such as Figures 12 to 14 As shown, the actuating portion 1710 is configured as a first protrusion formed on the outer periphery of the second locking member 171. The first protrusion protrudes towards the wrench 161 and is located on the movement path of the wrench 161 rotating around the eccentric shaft. In one example, the first protrusion is formed on the outer periphery of the second locking member 171 away from the locking groove 170, so that after the first locking mechanism 16 completes the eccentric drive of the second locking member 171 by the eccentric section 181, it can continue to form an actuating engagement with the first protrusion, so as to further convert the rotation of the first locking mechanism 16 into the rotational motion of the second locking member 171, thereby ensuring that the second locking engagement portion 141 can reliably and completely disengage from the locking groove 170.

[0127] Specifically, when the first locking mechanism 16 releases its lock from the first locking engagement portion 140 and continues to rotate around the eccentric shaft, the lever 161 of the first locking mechanism 16 gradually moves to contact the first protrusion and continuously abuts against it, causing the first protrusion to be subjected to a pulling force, which drives the second locking member 171 to rotate around its rotation center. As the second locking member 171 continues to rotate, the second locking engagement portion 141 gradually disengages from the locking groove 170, thereby completing the complete unlocking of the second locking mechanism 17.

[0128] After the second locking member 171 is unlocked, if the first locking mechanism 16 continues to rotate in the unlocking direction, it will easily cause the second locking member 171 to continue to rotate, causing the first locking mechanism 16 to overturn and interfere or rub against the second connecting seat 15 or other adjacent parts. This will not only affect the operating feel, but may also cause wear on the coating or paint on the surface of the parts.

[0129] Therefore, in one embodiment, as Figure 14 and Figure 15 As shown, Figure 15 This is a schematic diagram showing the structure of the second locking mechanism disposed on the second connecting seat in one embodiment of this application. The second locking member 171 is provided with a limiting structure 1711, and the second connecting seat 15 is provided with a limiting abutment portion 150 that cooperates with the limiting structure 1711. When the second locking member 171 rotates to a preset position in the unlocking direction, the limiting structure 1711 abuts against the limiting abutment portion 150 to restrict the second locking member 171 from continuing to rotate. Further, when the first locking mechanism 16 continues to rotate after releasing the lock between itself and the first locking engagement portion 140, the first locking mechanism 16 first abuts against the actuating portion 1710 and drives the second locking member 171 to rotate in the unlocking direction. When the second locking member 171 rotates to the preset position, the limiting structure 1711 abuts against the limiting abutment portion 150, causing the second locking member 171 to stop rotating. Since the first locking mechanism 16 is still in contact with the actuating part 1710 at this time, the second locking member 171 forms a reverse limit on the first locking mechanism 16 through the actuating part 1710, so as to restrict the first locking mechanism 16 from continuing to rotate in the unlocking direction.

[0130] The preset position can be determined based on the disengagement stroke of the second locking engagement part 141 relative to the locking groove 170 and the available space between the wrench 161 and the second connecting seat 15. When the limiting structure 1711 and the limiting abutment part 150 form an abutment, the second locking engagement part 141 has at least disengaged from the locking area 1701 mentioned in subsequent embodiments, preferably completely disengaged from the locking groove 170, to ensure that the first connecting seat 14 and the second connecting seat 15 can be smoothly folded relative to each other; at the same time, a safety gap is still maintained between the wrench 161 and the second connecting seat 15 or adjacent appearance parts. Thus, the complete unlocking of the second locking mechanism 17 and the overtravel protection of the wrench 161 can be taken into account. Especially when the outer surface of the first locking mechanism 16 is provided with a coating, paint layer or anodized layer, the second locking member 171 indirectly restricts the first locking mechanism 16 from continuing to fold outward, which can reduce the hard contact between the first locking mechanism 16 and the second connecting seat 15, reduce the risk of the surface coating being scratched or peeled off, and maintain the appearance consistency of the folder 13 after long-term use.

[0131] With the above structure, the second locking member 171 can be used as an intermediate limiting member to indirectly limit the first locking mechanism 16. There is no need to set an additional limiting structure between the first locking mechanism 16 and the second connecting seat 15. This can limit the maximum rotation angle of the first locking mechanism 16, avoid collision or friction between the first locking mechanism 16 and the second connecting seat 15, and improve the service life of the folder 13.

[0132] In one embodiment, such as Figure 14 and Figure 15 As shown, the limiting structure 1711 includes a second protrusion formed on the outer periphery of the second locking member 171. Specifically, the second protrusion is located on the outer side of the second locking member 171 along the unlocking rotation direction (that is, from the unlocking direction, the second protrusion protrudes beyond the outer periphery of the second locking member) and is formed by the opening edge of the locking groove 170 extending along the opening direction. Correspondingly, the second connecting seat 15 forms a limiting groove 151, and the groove wall of the limiting groove 151 constitutes the limiting abutment portion 150. When the second locking member 171 rotates to a preset position, the second protrusion abuts against the groove wall of the limiting groove 151 to limit the second locking member 171 from continuing to rotate. Furthermore, a buffer structure, such as an elastic pad, rubber part, plastic part, wear-resistant bushing, or other buffer member, can be provided between the limiting structure 1711 and the limiting abutment portion 150 to reduce the impact and noise during limiting.

[0133] Of course, in this application, the limiting structure 1711 is not limited to the structure of the second protrusion described above. It can also be configured as a limiting ear, a limiting block, a limiting pin, a limiting plate, a limiting rib, or other structures that can move together with the second locking member 171 and form a limiting fit. Correspondingly, the limiting abutment portion 150 is not limited to the groove wall of the limiting groove 151. It can also be configured as a stop block, a boss, a pin, a reinforcing rib, a limiting post, or other structures that can form an abutment limit with the limiting structure 1711. As long as it can limit the continued rotation of the second locking member 171 when it rotates to the preset position, and indirectly limit the continued rotation of the first locking mechanism 16 through the second locking member 171, it falls within the protection scope of this application.

[0134] In some of the foregoing embodiments, the locking groove 170 is formed on the second locking member 171 and is used for the second locking engagement part 141 to enter, lock, and disengage. Since the second locking engagement part 141 needs to repeatedly enter and disengage from the locking groove 170 between the locked and unlocked states, if the locking groove 170 is only set as a regular open groove, it is easy for problems such as difficulty in entry, jamming during exit, or excessive contact impact to occur during the unlocking process.

[0135] Therefore, in one embodiment, as Figure 13As shown, the locking groove 170 includes a locking area 1701 for forming a lock and a guide area 1702 communicating with the locking area 1701. The guide area 1702 is gradually expanded along the direction in which the second locking engagement part 141 disengages from the locking groove 170. In one example, the locking area 1701 is formed inside the locking groove 170 and is used to accommodate the second locking engagement part 141 in the locked state. The guide area 1702 is formed on the side of the locking groove 170 near the opening and is continuously communicating with the locking area 1701. Specifically, when the second locking engagement part 141 enters the locking groove 170, it can gradually enter the locking area 1701 along the guide area 1702. When the second locking member 171 is unlocked and rotated, the second locking engagement part 141 can gradually exit the locking groove 170 along the guide area 1702, thereby reducing interference during entry and exit and improving the smoothness of the unlocking process.

[0136] In one embodiment, such as Figure 13 As shown, at least one side of the guide area 1702 is formed by a guide slope 1703. Specifically, the guide slope 1703 gradually extends outward from the locking area 1701 along the direction in which the second locking engagement portion 141 disengages from the locking groove 170, thus forming a gradually expanding guide structure in the guide area 1702. When the second locking member 171 moves under the combined action of the eccentric section 181 and the first locking mechanism 16, the second locking engagement portion 141 gradually enters the guide area 1702 from the locking area 1701. Since the width of the guide area 1702 gradually increases along the disengagement direction, it can provide a gradually releasing movement space for the second locking engagement portion 141, allowing the second locking engagement portion 141 to disengage from the locking groove 170 more smoothly without having to cross a large contact edge at once, thereby reducing unlocking resistance and improving the continuity of the unlocking process.

[0137] Furthermore, in one embodiment, the guide area 1702 may have a guide slope 1703 provided on only one side, or guide slopes may be provided on both sides of the guide area 1702 to form a double-sided guide structure, so that the second locking engagement part 141 has a guiding function when entering or leaving the locking groove 170. This application does not limit this.

[0138] In one embodiment, such as Figure 13As shown, the locking groove 170 has a pressure-bearing wall 1700 that abuts against the second locking engagement portion 141. Specifically, the pressure-bearing wall 1700 is formed on the side of the locking area 1701 away from the opening of the locking groove 170, and serves as the main bearing surface when the second locking engagement portion 141 is locked. After the second locking engagement portion 141 enters the locking groove 170, the locking rod 172 abuts against the second locking engagement portion 141 and presses the second locking engagement portion 141 against the pressure-bearing wall 1700, so that the second locking engagement portion 141 is clamped between the locking rod 172 and the pressure-bearing wall 1700. Thus, the second locking engagement portion 141 is constrained from both sides by the locking rod 172 and the pressure-bearing wall 1700, which can effectively limit the second locking engagement portion 141 from wobbling along the width direction of the locking groove 170. At the same time, the radial locking force and axial locking force formed by the inclined setting of the aforementioned locking rod 172 can further improve the connection stability between the first folding part 11 and the second folding part, and reduce the possibility of gaps or abnormal noises during vehicle riding.

[0139] Accordingly, such as Figure 14 As shown, the second locking engagement portion 141 is disposed on the first connecting seat 14 and engages with the locking groove 170 on the second locking member 171, so that when the second locking member 171 is in the locked position, it enters the locking groove 170 and forms a locking engagement with the locking rod 172. In some embodiments, the second locking engagement portion 141 can be disposed on the first connecting seat 14 by means of fixed connection, detachable connection or integral molding, as long as it can form a locking engagement with the second locking member 171, this application does not limit it in this way.

[0140] In one embodiment, the second locking engagement portion 141 includes a cylindrical portion that mates with the locking groove 170. The cylindrical portion is transversely arranged on the first connecting seat 14 with its axis in mind, serving as the mating part that forms a locking engagement with the locking groove 170 and the locking rod 172. When the second locking member 171 is in the locked position, the cylindrical portion enters the locking groove 170 and is pressed against the pressure wall 1700 by the locking rod 172, so that the cylindrical portion is clamped between the locking rod 172 and the pressure wall 1700, thereby forming a stable locking engagement. Further, the second locking engagement portion also includes a connecting rod for mounting on the first connecting seat 14. The cylindrical portion is formed at one end of the connecting rod. The connecting rod can be mounted on the first connecting seat 14 by means of threaded connection, press-fit connection, pin connection, welding fixation, or integral molding, etc., and this application does not limit this.

[0141] Since this embodiment directly uses a cylindrical portion as the locking fit structure, there is no need to set up additional ball joint components or other mating parts. Therefore, the overall structure is simpler and the number of parts is smaller, which not only reduces costs but also makes processing and assembly more convenient. At the same time, the cylindrical portion can be formed by turning, cold heading, standard cylindrical pins, stud ends, or pin shaft structures. Compared with ball joint structures, it is easier to control processing costs and dimensional consistency, and it is also easier to select standard parts.

[0142] Of course, in this application, the second locking engagement part 141 is not limited to the above-mentioned cylindrical structure. It can also be configured as a roller structure, an arc-shaped cylindrical structure, an elliptical cylindrical structure, a drum-shaped structure, a pin structure with a rotating sleeve, or other engagement structures that can enter the locking groove 170 and form a locking engagement with the locking rod 172. Furthermore, the outer periphery of the second locking engagement part 141 can also be adjusted according to the structure of the locking groove 170 and the locking rod 172. As long as it can form a stable locking engagement with the locking groove 170 and the locking rod 172 and allow the second locking member 171 to complete the locking and unlocking actions, it falls within the protection scope of this application.

[0143] The unlocking and locking processes are described below. In one specific unlocking process, when the folder 13 is in the locked state, the first locking member 162 and the first locking engagement part 140 form a first lock, and the second locking member 171 and the second locking engagement part 141 form a second lock. The operator first presses the first locking member 162 while holding the wrench 161, causing the first locking member 162 to release the lock between itself and the first locking engagement part 140; at this time, the second locking member 171 remains locked with the second locking engagement part 141, and the first connecting seat 14 and the second connecting seat 15 cannot be directly folded open. Subsequently, the operator continues to rotate the wrench 161 while maintaining the grip. The wrench 161 drives the eccentric shaft 18 to rotate via the transmission section 180. The eccentric section 181 drives the second locking member 171 to move in the direction of disengaging from the second locking engagement part 141 along the eccentric trajectory. Furthermore, the contact between the wrench 161 and the actuating part 1710 drives the second locking member 171 to rotate, causing the second locking engagement part 141 to disengage from the locking groove 170. Thus, after the first locking mechanism 16 is unlocked, the folding device 13 can still maintain an intermediate locked state through the second locking mechanism 17. Only after the wrench 161 continues to rotate and the second locking mechanism 17 is unlocked can the first connecting seat 14 and the second connecting seat 15 be allowed to fold relative to each other, thereby improving the safety of the folding operation.

[0144] In a specific locking process, the operator rotates the first connecting seat 14 from the folded position to the unfolded position relative to the second connecting seat 15. The second locking engagement part 141 enters the locking area 1701 along the guide area 1702 of the locking groove 170. The torsion spring 174 applies a restoring force to the second locking member 171 toward the locking position, so that the second locking member 171 returns to the position where it can form a locking engagement with the second locking engagement part 141.

[0145] The operator then rotates the wrench 161 in the locking direction. The wrench 161 drives the eccentric shaft 18 to rotate in the opposite direction via the transmission section 180, causing the eccentric section 181 to gradually return from the relatively high position when unlocked to the relatively low position when locked, and driving the second locking member 171 to move towards the locking position. As the eccentric section 181 continues to move, the locking rod 172 gradually presses the second locking engagement part 141 against the pressure wall 1700, so that the second locking engagement part 141 is clamped between the locking rod 172 and the pressure wall 1700, thereby forming a second lock.

[0146] As the wrench 161 continues to rotate to the locked position, the first locking engagement 140 and the first locking member 162 form a locking engagement. The first locking member 162 can be temporarily displaced under the operator's pressure, or it can move in the pressing direction under the action of the guide structure on the first locking engagement 140; when the first locking engagement 140 reaches the locked position, the elastic member 163 causes the first locking member 162 to reset and form the first lock. Thus, the first locking mechanism 16 and the second locking mechanism 17 can restore the double locking state during the continuous locking operation of the wrench 161.

[0147] In one embodiment, such as Figure 5 , Figures 12 to 14 As shown, the second locking member 171 is provided with a mating hole 173 that mates with the eccentric section 181. The eccentric section 181 is at least partially inserted into the mating hole 173, so that the eccentric section 181 and the second locking member 171 form a kinematic engagement. When the eccentric section 181 moves along the eccentric trajectory, it drives the second locking member 171 to move in the direction of disengaging from the second locking engagement part 141. Specifically, since the eccentric section 181 is eccentrically arranged relative to the transmission section 180, when the eccentric shaft 18 rotates around the axis of the transmission section 180, the eccentric section 181 moves along the eccentric trajectory and drives the second locking member 171 to move synchronously through the mating hole 173.

[0148] In some embodiments, the second locking member 171 directly forms a supporting and driving engagement with the eccentric section 181 through the mating hole 173, eliminating the need for the second locking member 171 to be mounted to the second connecting seat 15 via a dedicated rotating shaft independent of the eccentric shaft 18. The second connecting seat 15 can constrain the range of motion and posture of the second locking member 171 through sidewalls, guide surfaces, or limiting surfaces located on both sides of the thickness direction of the second locking member 171. Thus, the second locking member 171 can generate an offset movement under the drive of the eccentric section 181 and rotate when the wrench 161 pushes the actuating part 1710, thereby forming a composite movement that adapts to the disengagement process of the second locking engagement part 141.

[0149] Depending on the movement stroke of the eccentric segment 181, the posture changes of the second locking member 171, manufacturing tolerances, and maintenance requirements, the mating hole 173 can be configured as: a round hole 1730 that directly mates with the eccentric segment 181, an irregularly shaped hole 1731 that adapts to the eccentric trajectory of the eccentric segment 181, or a round hole 1732 with a diameter larger than the external dimensions of the eccentric segment 181 and equipped with a mating member 1733. These different mating methods can be applied to different embodiments, without requiring simultaneous configuration on the same second locking member 171.

[0150] In one embodiment, such as Figure 5 As shown, the mating hole 173 is configured as a circular hole 1730 adapted to the eccentric segment 181. Specifically, the circular hole 1730 is formed in the middle of the second locking member 171 and extends through the thickness direction of the second locking member 171. The eccentric segment 181 passes through the circular hole 1730 so that the hole wall of the circular hole 1730 and the outer periphery of the eccentric segment 181 form a fit. In this embodiment, the diameter of the circular hole 1730 is adapted to the outer diameter of the eccentric segment 181, so that the eccentric segment 181 can maintain a stable fit within the circular hole 1730, and can directly transmit the eccentric displacement generated by the eccentric segment 181 along the eccentric trajectory to the second locking member 171. Furthermore, when the eccentric shaft 18 rotates, the eccentric segment 181 moves along the eccentric trajectory and pushes the second locking member 171 to move synchronously through the hole wall of the circular hole 1730, thereby realizing the transmission of the eccentric motion to the unlocking motion of the second locking member 171.

[0151] In the embodiments of this application, since the eccentric segment is eccentrically positioned relative to the transmission segment, it does not rotate concentrically around its own axis during rotation, but rather moves along an eccentric trajectory. Simultaneously, during unlocking, the second locking member not only moves towards disengaging from the second locking engagement part due to the drive of the eccentric segment, but also undergoes a change in posture under the actuation of the first locking mechanism. Therefore, the relative motion trajectory between the eccentric segment and the second locking member is not a unidirectional movement, but continuously changes throughout the entire unlocking and resetting process.

[0152] To avoid interference between the eccentric segment and the hole wall during movement, and to prevent issues such as uneven eccentric drive, movement jamming, or incomplete reset, in one embodiment, as follows... Figures 12 to 14 As shown, the mating hole 173 is configured as an irregularly shaped hole 1731 adapted to the eccentric trajectory of the eccentric segment 181, so that the eccentric segment 181 maintains a constant motion engagement with the second locking member 171 during its movement along the eccentric trajectory. Thus, the irregularly shaped hole 1731 can adapt to the eccentric trajectory, ensuring that the eccentric segment 181 maintains a stable motion engagement with the second locking member 171 throughout the entire unlocking and resetting process. It also reserves corresponding movement space for the eccentric segment 181 at different stages of its movement trajectory, thereby reducing motion interference, improving motion smoothness, and reducing sensitivity to machining accuracy.

[0153] In one embodiment, such as Figures 12 to 14 As shown, the irregular hole 1731 includes a central arc portion and two side extensions respectively connected to both sides of the central arc portion. Specifically, the central arc portion forms a working arc surface adapted to the outer periphery of the eccentric segment 181, and the two side extensions are respectively connected to both sides of the central arc portion, forming clearance areas on both sides of the working arc surface. When the folder 13 is in the locked state, under the combined action of the restoring force and locking reaction force of the second locking mechanism 17, the eccentric segment 181 abuts against the working arc surface to maintain a stable driving engagement relationship between the eccentric segment 181 and the second locking member 171, so that the eccentric segment 181 can reliably transmit the eccentric movement to the second locking member 171. The avoidance area is used to accommodate the motion envelope of the eccentric segment 181 relative to the second locking member 171 during the rotation of the eccentric shaft 18, the unlocking movement of the second locking member 171, and the resetting of the second locking member 171, so as to avoid the eccentric segment 181 from hard interference with the hole wall of the irregular hole 1731 during the above-mentioned movements.

[0154] Of course, in this application, the specific length, width, extension direction, and transition method between the two side extensions of the irregular hole 1731 and the central arc portion are not limited to... Figures 12 to 14 The embodiment shown. The two side extensions can be configured as straight extensions, arc extensions, broken line extensions, or curve extensions, or they can only form clearance spaces in certain areas. As long as they can adapt to the movement trajectory of the eccentric segment 181 during the eccentric drive and the attitude change of the second locking member 171, and ensure that the eccentric segment 181 and the second locking member 171 maintain stable movement cooperation, they all fall within the protection scope of this application.

[0155] Since the contact position between the eccentric section 181 and the irregular hole 1731 can change between the working arc surface and the two side extensions during the unlocking and resetting process, the eccentric section 181 can obtain continuous movement space throughout the entire unlocking and resetting process. It can automatically adjust the contact position according to different movement stages, reduce the impact of machining and assembly errors on the movement fit, reduce movement jamming and abnormal wear, and improve the smoothness, reliability and service life of the second locking mechanism 17 during the unlocking and resetting process.

[0156] Please see Figure 16 The diagram shows a schematic representation of the mating hole in one embodiment of this application. Figure 16 As shown, in one embodiment, the mating hole 173 can be configured as a circular hole 1732 with a diameter larger than the outer dimensions of the eccentric segment 181. The circular hole 1732 is provided with a mating member 1733 that mates with the eccentric segment 181 to adapt to the movement of the eccentric segment 181 along the eccentric trajectory and maintain the driving engagement between the eccentric segment 181 and the second locking member.

[0157] Specifically, the mating component 1733 is installed inside the circular hole 1732 and at least partially covers the outer periphery of the eccentric segment 181, so that the eccentric segment 181 contacts the mating component 1733 during its movement along the eccentric trajectory. The mating component 1733 transmits the eccentric movement of the eccentric segment 181 to the second locking component 171. Since the second locking component 171 and the eccentric segment 181 no longer have direct contact, but instead establish a motion fit through the mating component 1733, the mating component 1733 can maintain a stable driving relationship between the eccentric segment 181 and the second locking component 171, and also reduce direct wear between them, thereby improving the smoothness of the movement of the second locking mechanism 17. Meanwhile, since the diameter of the circular hole 1732 is larger than the outer dimensions of the eccentric section 181, the mating part 1733 can form a compensation space between the circular hole 1732 and the eccentric section 181, which is used to absorb the manufacturing and assembly errors between the eccentric section 181, the second locking part 171 and the second connecting seat 15, and reduce the risk of jamming caused by local dimensional deviations.

[0158] Furthermore, such as Figure 16 As shown, the mating component 1733 does not need to fully enclose the eccentric section 181. When the mating component 1733 is placed in the circular hole 1732, a preset gap is maintained between it and both sides of the eccentric section 181. This preset gap can avoid interference between the eccentric section 181 and the mating component 1733 due to machining errors, assembly errors, or long-term wear, reduce motion resistance, and improve the smoothness of movement during the unlocking and resetting process of the second locking component.

[0159] like Figure 16As shown, the mating part 1733 can be configured as a C-shaped bushing, an arc-shaped bushing, or a split bushing with an opening. The mating part 1733 includes an inner arc-shaped bearing surface that mates with the outer periphery of the eccentric segment 181 and an outer locating surface that mates with the wall of the circular hole 1732. The opening of the mating part 1733 can face the direction in which the eccentric segment 181 moves relative to the second locking member 171 to avoid interference. The opening provides clearance for the eccentric movement of the eccentric segment 181 and also allows the mating part 1733 to undergo slight elastic deformation to compensate for machining and assembly errors.

[0160] In other embodiments, the mating component 1733 may also be composed of two or more arc-shaped mating blocks spaced apart circumferentially along the circular hole 1732, each arc-shaped mating block providing local bearing and guiding functions respectively.

[0161] In one embodiment, such as Figure 16 As shown, the mating component 1733 is a bushing or sleeve detachably installed within the circular hole 1732. Specifically, the mating component 1733 can be installed within the circular hole 1732 by interference fit, snap fit, press fit, threaded connection, or other detachable methods, and can form a local support area around the eccentric section 181. Of course, in other embodiments, the mating component 1733 can also be fixed within the circular hole 1732 by overmolding, injection molding, adhesive bonding, or insert molding, etc., and this application does not limit this. In this way, when the mating component 1733 wears due to long-term stress, the mating component 1733 can be disassembled and replaced separately without replacing the second locking component 171 as a whole, so as to restore the fitting accuracy between the eccentric section 181 and the second locking component 171 and reduce maintenance costs.

[0162] In one embodiment, the mating component 1733 is made of a wear-resistant or low-friction material. The wear-resistant material includes copper alloys, powder metallurgy materials, or other wear-resistant metal materials. The low-friction material includes polytetrafluoroethylene (PTFE), polyoxymethylene (POM), nylon, self-lubricating composite materials, or other engineering plastics, and this application is not limited thereto. In embodiments requiring increased load-bearing capacity, the mating component 1733 may be made of copper alloys, oil-impregnated bearing materials, or powder metallurgy materials; in embodiments requiring reduced operating noise and frictional resistance, the mating component 1733 may be made of POM, nylon, or engineering plastics containing self-lubricating fillers. By selecting the material of the mating component 1733 according to load-bearing and friction requirements, a balance can be achieved between locking strength, unlocking feel, and maintenance costs.

[0163] In this embodiment, the second locking member is reset by the restoring force provided by a torsion spring. In some examples, the restoring force can be provided by a torsion spring located on one side. Since the restoring force mainly acts on one side of the second locking member, with repeated unlocking and resetting over a long period of time, the torsion spring is prone to fatigue or force shift, resulting in a decrease in the restoring force. This causes the second locking member to have a tendency to wobble along its thickness direction, which in turn makes it prone to friction and interference with the eccentric shaft, the first locking mechanism, or the second connecting seat, affecting the smoothness of unlocking and resetting, and even affecting the locking reliability of the second locking mechanism.

[0164] Therefore, in one embodiment, as Figure 5 As shown, the second locking mechanism 17 further includes a torsion spring 174, which is sleeved on the eccentric shaft 18 and spans across both sides of the second locking member 171 along its thickness direction, so as to cooperate with the second locking member 171 to form a restoring force acting on both sides of the second locking member 171 in its thickness direction. Specifically, when the second locking member 171 undergoes an unlocking movement under the action of the eccentric section 181 and the first locking mechanism 16, the torsion spring 174 undergoes torsional deformation and stores elastic potential energy; when the external driving force is released, the torsion spring 174 releases the restoring force, driving the second locking member 171 to move back to the locked position.

[0165] In one embodiment, such as Figure 5 As shown, the torsion spring 174 includes two wound portions 1740 located on both sides of the second locking member 171 in the thickness direction and sleeved on the eccentric shaft 18, and a mating section 1741 connecting the two wound portions 1740. The mating section 1741 connects the two wound portions 1740 and spans across the back side of the second locking member 171. The second locking member 171 is provided with a groove 1712 that mates with the mating section 1741. The mating section 1741 is engaged in the groove 1712 to limit the position of the torsion spring 174 relative to the second locking member 171 and to transmit the restoring force generated by the two wound portions 1740 to the second locking member 171.

[0166] Each winding portion 1740 may also be connected to a fixed arm or a support leg. The fixed arm or support leg abuts against the stop surface on the second connecting seat 15, or is inserted into a fixed hole, fixed groove, or limiting notch on the second connecting seat 15 to limit the position of the fixed end of the torsion spring 174 relative to the second connecting seat 15. The mating section 1741, as the working end of the torsion spring 174, engages with the second locking member 171. When the second locking member 171 rotates relative to the second connecting seat 15, a relative angular displacement occurs between the fixed arm or support leg and the mating section 1741, thereby allowing the two winding portions 1740 to store elastic potential energy.

[0167] In the locked state, the torsion spring 174 may have a preset initial torsion amount to continuously apply a pre-tightening restoring force toward the locked position to the second locking member 171, so that the second locking member 171 can reliably return to the locked position after the external pulling force is released, and reduce the possibility that the second locking member 171 may swing freely near the locked position due to vibration.

[0168] When two independent torsion springs are used, each torsion spring may have a fixed arm fixed to the second connecting seat 15 and an acting arm acting on the second locking member 171. The two torsion springs are located on both sides of the thickness direction of the second locking member 171 to form a restoring force on both sides.

[0169] In one embodiment, the slot 1712 can be configured as a groove extending along the thickness direction of the second locking member 171, so that the mating section 1741 can be embedded in the slot to limit the sliding of the mating section 1741 along the surface of the second locking member 171. Of course, the mating method between the mating section 1741 and the second locking member 171 is not limited to slot mating, but can also adopt slot mating, limiting groove mating, boss limiting, clamping mating, or other structural forms that can limit the position of the torsion spring 174 relative to the second locking member 171.

[0170] In other embodiments, the two winding portions 1740 may also be formed by two independent torsion springs, which are respectively disposed on both sides of the second locking member 171 in the thickness direction and respectively provide restoring force to the second locking member 171; or, the torsion spring 174 may also be used in conjunction with a damping member, an elastic washer or a limiting washer to reduce the impact and abnormal noise when the second locking member 171 is reset.

[0171] Thus, in the above embodiment, the engagement method of the torsion spring and the second locking member ensures that the engagement section always maintains a stable position relative to the second locking member during the repeated unlocking and resetting of the second locking member. This allows the restoring force generated by the two winding portions to act on both sides of the second locking member, thereby maintaining stable transmission of the restoring force and preventing changes in the force position due to slippage of the engagement section.

[0172] Compared with a single-sided torsion spring structure, this embodiment uses two winding parts to act on both sides of the thickness direction of the second locking member, so that the second locking member can maintain a relatively balanced restoring force during long-term use, reducing the sway, friction and interference caused by the offset of the restoring force of the second locking member, and improving the motion stability, unlocking feel and service life of the second locking mechanism.

[0173] In summary, the folding device and scooter using the same disclosed in this application, by having the first and second locking mechanisms cooperate on the same eccentric shaft and forming locking engagements with the first and second locking mating parts respectively, ensures that the folding device has dual locking capabilities while allowing the same eccentric shaft to also serve as a common motion transmission component between the first and second locking mechanisms. Thus, the eccentric shaft can receive the rotational force transmitted by the first locking mechanism and convert that rotational force into an eccentric motion that drives the second locking mechanism to unlock, eliminating the need for separate drive components, eccentric components, or intermediate transmission components for the two locking mechanisms, thereby establishing a linkage between the first and second locking mechanisms. Therefore, this application effectively reduces the number of parts, simplifies the overall structure of the folding device, reduces assembly complexity, and improves the mass production applicability of the folding device.

[0174] Based on the aforementioned linkage structure, after the first locking mechanism releases its lock with the first locking engagement part, the operator can continue to rotate the first locking mechanism, which will then drive the second locking mechanism to release its lock with the second locking engagement part via the same eccentric shaft. In other words, the unlocking actions of the first and second locking mechanisms can be completed sequentially during continuous operation, preserving the security of the double-lock structure during folding operations while improving the continuity and convenience of the unlocking action.

[0175] Regarding the operation of the first locking mechanism, by placing the first locking element inside the wrench and connecting the wrench to the eccentric shaft via a transmission section, the operator can press the first locking element to release the locking mechanism while holding the wrench. While maintaining the same grip, the operator can continue to rotate the wrench to drive the eccentric shaft. Therefore, the operator does not need to change finger positions before turning the wrench, nor does it require both hands to complete the unlocking operation, thus reducing the difficulty of unlocking and improving the smoothness and user experience of single-handed operation.

[0176] Regarding the locking stability of the second locking mechanism, by tilting the axis of the locking lever relative to the longitudinal reference line of the first folding part in the unfolded state, locking forces are generated radially and axially along the first folding part when the locking lever abuts against the second locking engagement part. These radial and axial locking forces respectively restrict the relative movement of the second locking engagement part in the corresponding directions, enabling the second locking mechanism to not only prevent the second locking engagement part from disengaging from the locking groove but also to constrain the relative gap between the first and second connecting seats in multiple directions. This improves the locking stability of the folding unit in the unfolded state, reduces the possibility of seat tube wobbling, abnormal noise, or decreased locking feel due to connection gaps during vehicle riding, thereby improving riding stability and reliability.

[0177] Regarding the linkage unlocking and limiting of the second locking member, a toggle part located on the movement path of the first locking mechanism is provided on the second locking member. When the first locking mechanism continues to rotate after unlocking the first locking engagement part, it can abut against the toggle part and drive the second locking member to rotate, thereby achieving linkage unlocking of the second locking mechanism. Simultaneously, a limiting structure that cooperates with the second connecting seat is provided on the second locking member. When the second locking member rotates to the preset unlocking position, the limiting structure can abut against the second connecting seat to limit further rotation of the second locking member. Since the first locking mechanism can still maintain abutment with the second locking member through the toggle part at this time, the second locking member can also restrict the first locking mechanism from continuing to rotate, thereby preventing the first locking mechanism from excessively flipping outwards and rubbing or interfering with the second connecting seat, reducing wear on the coating, paint, or exterior surface, and improving the durability and user experience of the folding device during long-term use.

[0178] Regarding the motion coordination between the eccentric segment and the second locking element, by providing mating holes on the second locking element that mate with the eccentric segment, and configuring these holes as round holes, round holes with mating parts, or irregularly shaped holes adapted to the eccentric segment's motion trajectory according to different usage requirements, the second locking element can better adapt to the movement of the eccentric segment along its eccentric trajectory. This improves the motion coordination between the eccentric segment and the second locking element, reduces the possibility of jamming, uneven wear, or interference between the eccentric segment and the second locking element during unlocking and resetting, and makes the operation of the second locking mechanism smoother, thereby improving the smoothness of the unlocking process and the reliability of the mechanism's operation.

[0179] Regarding the reset structure of the second locking member, by providing a torsion spring on the eccentric shaft, spanning both sides of the second locking member along its thickness direction, a more balanced restoring effect can be achieved on both sides of the second locking member. Furthermore, the engagement between the torsion spring and the second locking member ensures the stability of the torsion spring's restoring force, preventing force attenuation, force shift, or second locking member swaying due to unilateral force application during long-term use. This reduces the likelihood of friction or interference between the second locking member and adjacent components during rotation and reset, improving the motion stability, reset reliability, and long-term reliability of the second locking mechanism.

[0180] The above embodiments are merely illustrative of the inventive essence and beneficial effects of this application, and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the principles and scope of this application. Therefore, all equivalent modifications or alterations achieved by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A folding device for connecting a first folding section and a second folding section of a scooter, enabling the first folding section and the second folding section to switch between a folded state and an unfolded state, characterized in that, include: A first connecting seat is used to connect the first folded portion; The second connecting seat is used to connect the second folding part and is rotatably connected to the first connecting seat; the first connecting seat and / or the first folding part are provided with a first locking engagement part and a second locking engagement part; The first locking mechanism and the second locking mechanism are both disposed on the second connecting seat in cooperation with the same eccentric shaft, and respectively cooperate with the first locking engagement part and the second locking engagement part to lock the first connecting seat and the second connecting seat in the unfolded state; The eccentric shaft has a transmission section, an eccentric section, and a support section formed sequentially along its own axial direction. The transmission section, the eccentric section, and the support section are integrally formed or fixedly connected as one unit. The transmission section and the support section are rotatably supported on the second connecting seat. The second locking mechanism is configured to cooperate with the eccentric section, and the first locking mechanism is connected to the transmission section. When the first locking mechanism unlocks from the first locking engagement part and continues to rotate, the transmission section drives the eccentric shaft to rotate, so that the eccentric section moves along the eccentric trajectory and causes the second locking mechanism to move in the direction of disengaging from the second locking engagement part, thereby releasing the lock between the mechanism and the second locking engagement part.

2. The folding device according to claim 1, characterized in that, The first locking mechanism includes a wrench connected to the eccentric shaft and a first locking member movably disposed inside the wrench, so that when the operator holds the wrench, he / she presses the first locking member to release the lock with the first locking engagement part, and continues to operate the wrench to rotate while holding the wrench.

3. The folding device according to claim 2, characterized in that, The first locking mechanism further includes an elastic element disposed between the first locking member and the wrench, the elastic element being disposed along the pressing direction of the first locking member; when the first locking member moves along the pressing direction, the elastic element is compressed and the first locking member is released from locking with the first locking engagement portion; when the first locking member is released, the elastic element causes the first locking member to reset.

4. The folding device according to claim 2, characterized in that, The first locking member includes a pressing part and a locking part located below the pressing part to cooperate with the first locking engagement part. The pressing part has an outwardly inclined slope structure to facilitate placement and pressing by the operator.

5. The folding device according to claim 4, characterized in that, The upper surface of the inclined structure has anti-slip texture.

6. The folding device according to claim 4, characterized in that, The wrench is provided with a beveled opening that is adapted to the beveled structure, and the beveled structure at least partially protrudes from the beveled opening of the beveled opening when not pressed.

7. The folding device according to claim 2, characterized in that, The first locking member has a locking hole, and the first locking engagement part passes through the locking hole. When the axis of the locking hole is offset from the axis of the first locking engagement part, the hole wall of the locking hole limits the first locking engagement part to form a locking engagement. When the first locking member is pressed, the locking hole moves to be aligned with the first locking engagement part, so as to allow the first locking engagement part to pass through the locking hole and release the lock.

8. The folding device according to claim 2, characterized in that, The first locking member is provided with a locking hook portion, which hooks with the first locking engagement portion to form a locking engagement. When the first locking member is pressed, the locking hook portion moves along the pressing direction with the first locking member and disengages from the first locking engagement portion, thereby releasing the lock between the first locking member and the first locking engagement portion.

9. The folding device according to claim 1, characterized in that, The support section passes through the correction support member, which is rotatably mounted on the second connecting seat. The rotation axis of the correction support member is coaxial with the rotation axis of the transmission section to correct the support position of the support section relative to the second connecting seat.

10. The folding device according to claim 9, characterized in that, The outer periphery of the support section is provided with a non-circular mating structure, and the correction support is provided with mounting holes adapted to the non-circular mating structure to restrict the relative rotation between the support section and the correction support, so that the support section drives the correction support to rotate synchronously.

11. The folding device according to claim 1, characterized in that, The transmission section is provided with a transmission engagement structure, and the first locking mechanism is provided with a transmission structure that engages with the transmission engagement structure to restrict the relative rotation between the transmission section and the first locking mechanism, so that the first locking mechanism drives the transmission section to rotate synchronously.

12. The folding device according to claim 11, characterized in that, The transmission engagement structure includes at least one protrusion disposed on the outer periphery of the transmission section, and the transmission structure includes a mating groove formed on the first locking mechanism that is adapted to the protrusion.

13. The folding device according to claim 11, characterized in that, The transmission engagement structure includes a transmission engagement groove formed on the transmission section, and the transmission structure includes a transmission rod disposed on the first locking mechanism. The transmission rod extends into the transmission engagement groove to restrict the relative rotation between the transmission section and the first locking mechanism.

14. The folding device according to claim 1, characterized in that, The axis of the eccentric section is offset by 2.0 mm to 3.0 mm relative to the axis of the transmission section.

15. The folding device according to claim 1, characterized in that, The second locking mechanism includes a second locking member and a locking rod. The second locking member has a locking groove for the second locking mating part to enter or disengage relative to each other. The locking rod extends at least partially into the locking groove so that it abuts against the second locking mating part after the second locking mating part enters the locking groove relative to each other to form a lock. When the eccentric section moves along the eccentric trajectory, it drives the second locking member to move so that the locking rod releases the locking effect on the second locking mating part, allowing the second locking mating part to disengage relative to each other from the locking groove.

16. The folding device according to claim 15, characterized in that, When the eccentric segment is in the locked state, it is located below the transmission segment so that when the eccentric segment drives the second locking member to move along the eccentric trajectory, the second locking member has at least an upward component of motion.

17. The folding device according to claim 15, characterized in that, The locking rod is rotatably disposed on the second locking member, and its length extending into the locking groove can be adjusted by rotation to adjust the locking position between the locking rod and the second locking mating part.

18. The folding device according to claim 15, characterized in that, The first folded portion has a longitudinal reference line extending along its length when unfolded. The axis of the locking rod is inclined relative to the longitudinal reference line so that when the locking rod abuts against the second locking engagement portion, it generates locking components in the radial and axial directions along the first folded portion, respectively restricting the movement of the second locking engagement portion in the corresponding directions.

19. The folding device according to claim 18, characterized in that, The axis of the locking rod is inclined at an angle of 20° to 24° relative to the longitudinal reference line.

20. The folding device according to claim 18, characterized in that, The locking groove has a pressure-bearing wall that abuts against the second locking engagement part. When the locking rod abuts against the second locking engagement part, the second locking engagement part is pressed against the pressure-bearing wall so that the second locking engagement part is clamped between the locking rod and the pressure-bearing wall.

21. The folding device according to claim 15, characterized in that, The locking groove includes a locking area for forming a lock and a guide area communicating with the locking area, the guide area being gradually expanded along the direction of disengagement of the second locking engagement part.

22. The folding device according to claim 21, characterized in that, At least one side of the guide area is formed by a guide ramp.

23. The folding device according to claim 15, characterized in that, The second locking member is provided with a toggle part located on the movement path of the first locking mechanism. When the first locking mechanism releases the lock between itself and the first locking engagement part and continues to rotate, it abuts against the toggle part to drive the second locking member to rotate, so that the second locking engagement part is relatively disengaged from the locking groove.

24. The folding device according to claim 23, characterized in that, The actuating part is configured as a first protrusion formed on the outer periphery of the second locking member.

25. The folding device according to claim 23, characterized in that, The second locking member is provided with a limiting structure, and the second connecting seat is provided with a limiting abutment part that cooperates with the limiting structure. When the second locking member continues to rotate to the preset position, the limiting structure abuts against the limiting abutment part to restrict the second locking member from continuing to rotate.

26. The folding device according to claim 25, characterized in that, The limiting structure includes a second protrusion formed on the outer periphery of the second locking member. The second protrusion is located on the outside of the second locking member along the unlocking rotation direction and extends along the opening direction of the locking groove.

27. The folding device according to claim 25 or 26, characterized in that, When the first locking mechanism abuts against the actuating part and the limiting structure abuts against the limiting abutting part, the second locking member restricts the first locking mechanism from continuing to rotate through the actuating part.

28. The folding device according to claim 15, characterized in that, The second locking member is provided with a mating hole that mates with the eccentric section. The eccentric section passes through the mating hole so that when the eccentric section moves along the eccentric trajectory, it drives the second locking member to move in the direction of disengaging from the second locking mating part.

29. The folding device according to claim 28, characterized in that, The mating hole is a circular hole adapted to the eccentric section.

30. The folding device according to claim 28, characterized in that, The mating hole is a circular hole with a diameter larger than the outer dimensions of the eccentric segment. The circular hole is provided with a mating part that mates with the eccentric segment to adapt to the movement of the eccentric segment along the eccentric trajectory and maintain the driving engagement between the eccentric segment and the second locking part.

31. The folding device according to claim 30, characterized in that, The mating component is a bushing or sleeve that is detachably disposed within the mating hole.

32. The folding device according to claim 30, characterized in that, The mating parts are made of wear-resistant or low-friction materials.

33. The folding device according to claim 28, characterized in that, The mating hole is an irregularly shaped hole adapted to the eccentric trajectory of the eccentric segment, so that the eccentric segment maintains a motional engagement with the second locking member during its movement along the eccentric trajectory.

34. The folding device according to claim 33, characterized in that, The irregular hole includes a central arc portion and two side extensions that are respectively connected to both sides of the central arc portion.

35. The folding device according to claim 15, characterized in that, The second locking mechanism further includes a torsion spring, which is sleeved on the eccentric shaft and spans across both sides of the second locking member along the thickness direction of the second locking member, so as to cooperate with the second locking member to form a restoring force on both sides.

36. The folding device according to claim 35, characterized in that, The torsion spring includes two winding portions located on both sides of the thickness direction of the second locking member and sleeved on the eccentric shaft, and a mating section connecting the two winding portions; the second locking member is provided with a groove that mates with the mating section, and the mating section is engaged in the groove to limit the position of the torsion spring relative to the second locking member.

37. The folding device according to claim 15, characterized in that, The second locking part includes a cylindrical part that mates with the locking groove.

38. A scooter, characterized in that, It includes a first folding portion, a second folding portion, and a folder connecting the first folding portion and the second folding portion, the folder being configured as described in any one of claims 1 to 37, wherein the first folding portion is connected to the second folding portion via the folder and is capable of switching between a folded state and an unfolded state relative to the second folding portion.

39. The scooter according to claim 38, characterized in that, The first folding part is a riser assembly, and the second folding part is a frame.

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