Locking structure of folding frame
By introducing a secondary locking mechanism and a slotted locking hook design into the locking structure of the folding frame, the problem of accidental unlocking in existing technologies is solved, achieving higher security and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI QIANYUAN NEW ENERGY CO LTD
- Filing Date
- 2025-10-16
- Publication Date
- 2026-07-21
AI Technical Summary
Existing folding bike locking mechanisms are prone to accidental unlocking, affecting riding stability and safety.
A locking structure for a folding frame is designed, including an external handle and a secondary locking mechanism. By setting a slot and a locking hook between the handle and the frame, accidental unlocking is prevented, and a torsion spring provides a rebound force to ensure the locked state.
It effectively prevents the frame from accidentally folding during riding, improving safety and simplifying the unlocking process.
Smart Images
Figure CN224528885U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of folding bicycle technology, specifically a locking structure for a folding bicycle frame. Background Technology
[0002] With the acceleration of urbanization and the popularization of green travel concepts, portable transportation tools such as folding bicycles and folding electric bikes are becoming increasingly popular. The core advantage of these products lies in their foldability, which effectively saves storage space and makes them easy to carry into public transportation or indoors.
[0003] The performance and safety of a folding bike largely depend on the reliability of its frame locking mechanism. Existing folding bike locking mechanisms mainly rely on handles (quick-release levers) at the folding joint to achieve locking and unlocking operations. In actual use, because the handle protrudes outside the folding joint, it is easy to accidentally release the folding joint (i.e., unlock) after locking the handle, which will affect the stability and safety of riding.
[0004] In view of this, a locking structure for a folding frame is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide a locking structure for a folding frame in order to solve the problems mentioned above.
[0006] The technical solution adopted by this utility model is as follows: a locking structure for a folding frame, including a first frame, a second frame, and a locking mechanism. One end of the first frame and the second frame are connected by a hinge. The free ends of the first frame and the second frame are locked and fixed by the locking structure. The locking structure includes an external handle and a secondary locking mechanism installed on the external handle. The first frame has a slot corresponding to the secondary locking mechanism. When the external handle is in the locked position, one end of the secondary locking mechanism is engaged in the slot to limit the position of the external handle.
[0007] In a preferred embodiment, the secondary locking mechanism includes a locking member and a torsion spring. Two sets of connecting ears are spaced apart at one end of the outer handle facing the first frame. The two ends of the locking member are correspondingly coupled to the connecting ears via a rotating shaft. The slot is located within the running trajectory of the locking member.
[0008] In a preferred embodiment, the locking member has a locking hook protruding from one end facing the first frame and engaging with the slot. When the locking member rotates upward at a certain angle, the locking hook can disengage from the slot accordingly.
[0009] In a preferred embodiment, the locking member is generally L-shaped, and the top of the locking member protrudes upward to form an inner handle.
[0010] In a preferred embodiment, when the external pull handle is in the locked state, there is a gap between the first frame and the external pull handle that allows a finger to be inserted.
[0011] In a preferred embodiment, the torsion spring is mounted on the rotating shaft, and its two ends are respectively connected to the locking member and the connecting lug.
[0012] In a preferred embodiment, the external pull handle is coupled to one end of the second frame facing away from the hinge via a second pivot. When the external pull handle is in the locked state, one end of the external pull handle presses against the protruding position at one end of the first frame.
[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: an additional secondary locking mechanism is designed between the frame and the handlebars. When the handlebars are in the locked state, the locking hook of the secondary locking mechanism will be firmly locked in the slot, which can prevent the handlebars from being opened due to accidents or accidental contact, and completely eliminate the risk of the frame being accidentally folded during riding. When unlocking, you only need to press the inner handlebar and push the locking hook upward to disengage it from the slot to carry out the subsequent unlocking operation. Compared with a single locking structure, the safety is significantly improved. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the entire utility model; Figure 2 This is a simplified schematic diagram of the three-dimensional structure of this utility model after removing the first frame (but retaining the bottom protrusion); Figure 3 for Figure 2 A simplified diagram of the enlarged structure at point A.
[0015] Marked in the image: 100 - First frame, 110 - Card slot; 200-Locking mechanism, 210-Outer handle, 220-Locking element, 230-Torsion spring; 211-Connecting Ear; 221-Locking hook, 222-Inner handle, 223-Swivel shaft; 300 - Second frame; 400-Hinge. Detailed Implementation
[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0018] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0019] Reference Figure 1-3 A locking structure for a folding bicycle frame includes a first frame 100, a second frame 300, and a locking mechanism 200. One end of the first frame 100 and the second frame 300 are coupled together by a hinge 400. The free ends of the first frame 100 and the second frame 300 are locked and fixed by the locking structure 200. The locking structure 200 includes an outer pull handle 210 and a secondary locking mechanism installed on the outer pull handle 210. The first frame 100 has a slot 110 corresponding to the secondary locking mechanism. When the outer pull handle... When the handle 210 is in the locked position, one end of the secondary locking mechanism is engaged in the slot 110 to limit the position of the outer handle 210. An additional secondary locking mechanism is designed between the frame and the outer handle 210. When the outer handle 210 is in the locked state (position), one end of the secondary locking mechanism will be firmly engaged in the slot 110, which can prevent the outer handle 210 from being opened due to accident or accidental contact, eliminating the risk of the frame being accidentally folded during riding. Compared with a single locking structure, the safety is significantly improved.
[0020] In this embodiment, please refer to Figure 2 and Figure 3As shown, the secondary locking mechanism includes a locking element 220 and a torsion spring 230. Two sets of connecting ears 211 are spaced apart at one end of the outer pull handle 210 facing the first frame 100. Both ends of the locking element 220 are correspondingly coupled to the connecting ears 211 via a rotating shaft 223. A slot 120 is located within the running trajectory of the locking element 220. The end of the locking element 220 facing the first frame 100 protrudes to form a locking hook 221 that matches and engages with the slot 110. When the outer pull handle 210 is in the locked state... When the locking hook 221 is engaged in the slot 110, the locking member 220 can be used to help position the outer pull handle 210, avoiding accidental unlocking of the folding joint due to accidental contact with the outer pull handle 210. When unlocking is required, press the locking member 220 to rotate it upwards by a certain angle. At this time, the locking hook 221 separates from the slot 110, and the outer pull handle 210 can be pulled to disengage it from the first frame 100, allowing the frame to be folded.
[0021] In this embodiment, please refer to Figure 3 As shown, the locking element 220 has an overall L-shaped structure, with an inner handle 222 protruding upwards from the top. The inner handle 222 is designed to facilitate operation by pressing with the user's fingers. The pressing end of the inner handle 222 may also have an anti-slip texture.
[0022] In this embodiment, please refer to Figure 1 As shown, when the outer handle 210 is in the locked state, there is a gap between the first frame 100 and the outer handle 210 that allows fingers to be inserted. This gap provides space for the user to press the inner handle 222 and avoids the risk of pinching fingers. Additionally, a baffle can be provided on the side of the outer handle 210 to further prevent accidental contact and contamination.
[0023] In this embodiment, the torsion spring 230 is mounted on the rotating shaft 223, and its two ends are connected to the locking member 220 and the connecting ear 211 respectively. The rebound force of the torsion spring 230 can ensure the self-resetting operation after each pressing of the locking member 220, and can also ensure the locking strength between the locking hook 221 and the slot 110.
[0024] In this embodiment, the external pull handle 210 is coupled to one end of the second frame 300 facing away from the hinge 400 via a second pivot (not shown in the figure). When the external pull handle 210 is in the locked state, one end of the external pull handle 210 presses against a protruding position at one end of the first frame 100. An eccentric cam structure can be additionally designed on the second pivot. The folding joint mechanism in the frame is an existing and commonly used technology. The specific implementation of locking and unlocking will not be described in detail.
[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A locking structure for a folding bicycle frame, characterized in that, The device includes a first frame, a second frame, and a locking mechanism. One end of the first frame and the second frame are connected by a hinge. The free ends of the first frame and the second frame are locked and fixed by the locking structure. The locking structure includes an external handle and a secondary locking mechanism installed on the external handle. The first frame has a slot corresponding to the secondary locking mechanism. When the external handle is in the locked position, one end of the secondary locking mechanism is engaged in the slot to limit the position of the external handle.
2. The locking structure of the folding frame as described in claim 1, characterized in that: The secondary locking mechanism includes a locking element and a torsion spring. Two sets of connecting ears are spaced apart at one end of the outer handle facing the first frame. The two ends of the locking element are correspondingly coupled to the connecting ears through a rotating shaft. The slot is located within the running trajectory of the locking element.
3. The locking structure of the folding frame as described in claim 2, characterized in that: The locking member has a locking hook that protrudes from one end facing the first frame and engages with the slot. When the locking member rotates upward at a certain angle, the locking hook can disengage from the slot.
4. The locking structure of the folding frame as described in claim 3, characterized in that: The locking element is generally L-shaped, and the top of the locking element protrudes upward to form an inner handle.
5. The locking structure of the folding frame as described in claim 4, characterized in that: When the external handle is in the locked state, there is a gap between the first frame and the external handle that allows a finger to be inserted.
6. The locking structure of the folding frame as described in claim 5, characterized in that: The torsion spring is mounted on the rotating shaft, and its two ends are respectively connected to the locking member and the connecting ear.
7. The locking structure of the folding frame as described in claim 1, characterized in that: The external pull handle is coupled to the end of the second frame facing away from the hinge via a second pivot. When the external pull handle is in the locked state, one end of the external pull handle presses against the protruding position at one end of the first frame.