Folding kick scooter with double synchronous locking mechanism
The folding kick scooter with a double synchronous locking mechanism simplifies the operation of folding and unfolding by integrating the top and down tubes with a single actuation, addressing the complexity of conventional double locking mechanisms.
Patent Information
- Application Number
- DE202025105592
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-01-15
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Conventional folding scooters with double locking mechanisms require two separate actions for folding and unfolding, leading to complexity and potential user errors, especially in urban environments where quick operation is needed.
A folding kick scooter with a double synchronous locking mechanism using an eccentric bushing, locking key, eccentric connecting ring, and telescopic connecting element, allowing the top and down tubes to be locked or unlocked with a single actuation through a coordinated movement of the eccentric hole and locking bolt block.
Simplifies the operation of folding and unfolding the scooter by eliminating the need for two separate actions, enhancing user-friendliness and safety by ensuring stability with a single actuation.
Smart Images
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Abstract
Description
TECHNOLOGY AREA
[0001] The utility model relates to kick scooter technology, in particular to a folding kick scooter with double synchronous locking mechanism. BACKGROUND
[0002] Folding scooters have become very popular, especially in urban environments with limited space, due to their portability and ease of use. A key component of the scooter is the folding mechanism, which allows it to be folded for easy storage or transport. To ensure user safety during use, this folding mechanism typically includes a locking device that secures the scooter in its unfolded position.
[0003] In recent years, a double locking mechanism has been introduced to the market, providing an additional layer of safety. This locking mechanism typically includes separate locking devices for different parts (e.g., hinges and handlebars) of the folding mechanism. While this approach improves safety, it also increases complexity for users, as locking and unlocking the scooter requires two separate actions. For example, one locking mechanism secures a folding joint, while the other locks the handlebar position. With this design, folding or unfolding the scooter requires a series of actions, which is not only time-consuming but can also lead to errors, such as forgetting to engage a lock, thus compromising the scooter's stability.
[0004] In current technology, each locking mechanism typically requires manual operation. This is particularly impractical when quick folding or unfolding is needed, especially in urban environments where a user might want to quickly fold the scooter for transport or unfold it for use. While a double-locking mechanism can improve safety, its complex operation represents a significant drawback in terms of user-friendliness. DESCRIPTION OF THE USE PATTERN
[0005] The utility model is based on the objective of providing a folding kick scooter device with a double synchronous locking mechanism, comprising a top tube coupling piece (1) and a down tube coupling piece (2), which are rotatably connected via a connecting shaft (23), wherein an eccentric bushing (3) is mounted on the connecting shaft (23) and a locking key (4) is mounted on the eccentric bushing (3), or can rotate coaxially with the outer circumference of the eccentric bushing (3), while an eccentric connecting ring (6) is mounted on the eccentric bushing (3), or can rotate coaxially asynchronously with the outer circumference of the eccentric bushing (3), wherein the locking bolt block (5) is connected to the eccentric connecting ring (6) via the telescopic connecting element (7).
[0006] The top tube coupling piece (1) and the down tube coupling piece (2) are locked by the locking bolt block (5) by bringing the eccentric hole (31) of the eccentric bushing (3) close to the locking bolt block (5) when the top tube is locked, between the fixing key (4) and the top tube coupling piece (1).
[0007] The top tube coupling piece (1) and the down tube coupling piece (2) are unlocked by the locking bolt block (5) by turning the eccentric hole (31) of the eccentric bushing (3) away from the locking bolt block (5) when the top tube is unlocked, between the fixing key (4) and the top tube coupling piece (1).
[0008] With this design, a double synchronous locking arrangement is formed by the eccentric bushing (3), the locking key (4), the eccentric connecting ring (6), and the telescopic connecting element (7), providing a folding scooter device in which the top tube and the down tube can be locked or unlocked with a single actuation. This effectively solves the existing problem with the conventional folding scooter device with a double locking mechanism, which requires two separate acts, thus eliminating the cumbersome handling.
[0009] To solve the problem, the present utility model demonstrates the following: A folding kick scooter device with double synchronous locking mechanism, comprising a top tube coupling piece (1), a down tube coupling piece (2), an eccentric bushing (3), a locking key (4), a locking bolt block (5), an eccentric connecting ring (6) and a telescopic connecting element (7), wherein the top tube coupling piece (1) and the down tube coupling piece (2) are rotatably connected to each other via a connecting shaft (23), while the eccentric bushing (3) is mounted on the connecting shaft (23) and the locking key (4) is mounted on the eccentric bushing (3), or can rotate coaxially with the outer circumference of the eccentric bushing (3), while the eccentric connecting ring (6) is mounted on the eccentric bushing (3), or can rotate coaxially asynchronously with the outer circumference of the eccentric bushing (3), wherein the locking bolt block (5) is connected to the eccentric connecting ring (6) via the telescopic connecting element (7), wherein the top tube coupling piece (1) and the down tube coupling piece (2) are locked by the locking bolt block (5) by bringing the eccentric hole (31) of the eccentric bushing (3) close to the locking bolt block (5) when the top tube is locked between the fixing key (4) and the top tube coupling piece (1), wherein the top tube coupling piece (1) and the down tube coupling piece (2) are unlocked by the locking bolt block (5) by turning the eccentric hole (31) of the eccentric bushing (3) away from the locking bolt block (5) when the top tube is unlocked, between the fixing key (4) and the top tube coupling piece (1).
[0010] It can also be designed such that an upper locking element (11) with an upper tab (12) is attached to the front of the top tube coupling piece (1), in which an upper axle hole set (13) is formed.
[0011] It can further be designed such that a lower locking element (21) with a lower tab (22) is attached to the front of the down tube coupling piece (2), with whose connecting shaft (23) the down tube coupling piece (2) is rotatably connected to the top tube coupling piece (1) through the upper axle hole set (13).
[0012] It can further be designed such that the eccentric bushing (3) is formed with an eccentric hole (31) and also with a stop surface (32) on its outer circumference, wherein the eccentric hole (31) is placed on the connecting shaft (23), while the axis of the eccentric hole (31) remains parallel, i.e., not coaxial, relative to the axis of the outer circumference of the eccentric bushing (3).
[0013] It can further be designed such that the fixing key (4) comprises a switching element (41), a locking buckle (42) and a bushing-specific mounting hole (43), wherein the outer circumference of the eccentric bushing (3) is inserted into the bushing-specific mounting hole (43), wherein the bushing-specific mounting hole (43) fits together positively with the outer circle of the eccentric bushing (3).
[0014] It can further be designed such that the eccentric connecting ring (6) has a large ring (61) and a small ring (62), wherein the large ring (61) is placed on the outer circumference of the eccentric bushing (3), or fits together with the outer circumference of the eccentric bushing (3) via a certain clearance, i.e. can rotate coaxially asynchronously with the outer circumference of the eccentric bushing (3).
[0015] It can also be designed such that one end of the telescopic connecting element (7) is coupled to the small ring (62) via a connecting bolt (71), and the other end of the telescopic connecting element (7) is connected to the locking bolt block (5).
[0016] With this design, a double synchronous locking arrangement is formed by the eccentric bushing (3), the locking key (4), the eccentric connecting ring (6), and the telescopic connecting element (7), providing a folding scooter device in which the top tube and the down tube can be locked or unlocked with a single actuation. This effectively solves the existing problem with the conventional folding scooter device with a double locking mechanism, which requires two separate acts, thus eliminating the cumbersome handling. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 shows a first 3D view of the present utility model in the locked state, Fig. Figure 2 shows a second 3D view of the present utility model in the locked state, Fig. Figure 3 shows a 3D view of the present utility model with a secondary locking buckle in the unlocked state, Fig. Figure 4 shows a 3D view of the present utility model with a primary and a secondary locking buckle in the unlocked and open states, respectively. Fig. Figure 5 shows a sectional view of the present utility model in the locked state, Fig. Figure 6 shows a sectional view of the present utility model with the secondary locking buckle in the unlocked state, Fig. Figure 7 shows a sectional view of the present utility model with a primary and a secondary locking buckle in the unlocked and open states, respectively. Fig. Figure 8 shows a first exploded view of the present utility model, Fig. Figure 9 shows a second exploded view of the present utility model, Reference symbol list
[0017] Top tube coupling piece 1, upper locking element 11, upper tab 12, upper axle hole set 13; Down tube coupling piece 2, lower locking element 21, lower tab 22, connecting shaft 23; Eccentric bushing 3, eccentric hole 31, stop surface 32; Locking key 4, switching element 41, locking buckle 42, bushing-specific mounting hole 43; Locking bolt block 5, eccentric connecting ring 6, large ring 61, small ring 62, telescopic connecting element 7, connecting bolt 71. DETAILED DESCRIPTION OF EXAMPLES OF EXECUTION
[0018] Further objectives, advantages, features and application possibilities of the utility model will become apparent from the following description of the exemplary embodiments based on the drawings.
[0019] The following description goes into numerous specific details to enable a comprehensive understanding of the present utility model. However, the utility model can also be implemented in other ways that differ from those described here. Industry experts can also make analogous extensions without deviating from the spirit of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed below.
[0020] Furthermore, the present utility model is described in detail with reference to the accompanying drawings. For clarity, the cross-sectional views of various mechanisms may be shown enlarged, sometimes without regard to the general scale, when explaining the embodiments of the present utility model. Moreover, the accompanying drawings serve only for illustration and should not be considered a specific limitation of the scope of protection of the present utility model. In addition, the actual manufacture is intended to include three-dimensional spatial dimensions, i.e., length, width, and depth.
[0021] Further objectives, advantages, features, and application possibilities of the utility model will become apparent from the following description of the exemplary embodiments with reference to the drawings. Fig. 1 to Fig.Figure 9 shows the folding kick scooter device according to the invention with a top tube coupling piece (1), a bottom tube coupling piece (2), an eccentric bushing (3), a fixing key (4), a locking bolt block (5), an eccentric connecting ring (6) and a telescopic connecting element (7).
[0022] As schematically shown, the present folding scooter device comprises a top tube coupling piece (1), a down tube coupling piece (2), an eccentric bushing (3), a locking key (4), a locking bolt block (5), an eccentric connecting ring (6), and a telescopic connecting element (7), wherein the top tube coupling piece (1) and the down tube coupling piece (2) are rotatably connected to each other via a connecting shaft (23), while the eccentric bushing (3) is mounted on the connecting shaft (23), and the locking key (4) is mounted on the eccentric bushing (3) or can rotate coaxially with the outer circumference of the eccentric bushing (3), while the eccentric connecting ring (6) is mounted on the eccentric bushing (3) or can rotate coaxially asynchronously with the outer circumference of the eccentric bushing (3), and the locking bolt block (5) is connected to the eccentric bushing (3) via the telescopic connecting element (7). Eccentric connecting ring (6) is connected.The top tube coupling piece (1) and the down tube coupling piece (2) are locked by the locking bolt block (5) by bringing the eccentric hole (31) of the eccentric bushing (3) close to the locking bolt block (5) when the top tube is locked, between the fixing key (4) and the top tube coupling piece (1).
[0023] The top tube coupling piece (1) and the down tube coupling piece (2) are unlocked by the locking bolt block (5) by turning the eccentric hole (31) of the eccentric bushing (3) away from the locking bolt block (5) when the top tube is unlocked, between the fixing key (4) and the top tube coupling piece (1).
[0024] It may be preferred that an upper locking element (11) with an upper tab (12) in which an upper axle hole set (13) is formed is attached to the front side of the top tube coupling piece (1).
[0025] It may be preferred that a lower locking element (21) with a lower tab (22) is attached to the front of the down tube coupling piece (2), with the connecting shaft (23) of which the down tube coupling piece (2) is rotatably connected to the top tube coupling piece (1) through the upper axle hole set (13).
[0026] It may be preferred that the eccentric bushing (3) is formed with an eccentric hole (31) and also with a stop surface (32) on its outer circumference, wherein the eccentric hole (31) is placed on the connecting shaft (23), while the axis of the eccentric hole (31) remains parallel, i.e., not coaxial, relative to the axis of the outer circumference of the eccentric bushing (3).
[0027] It may be preferred that the locking key (4) comprises a switching element (41), a locking buckle (42) and a bushing-specific mounting hole (43), wherein the outer circumference of the eccentric bushing (3) is inserted into the bushing-specific mounting hole (43), wherein the bushing-specific mounting hole (43) fits positively with the outer circle of the eccentric bushing (3), wherein the switching element (41) is held in the locked state by a spring inserted in the locking key (4), while the locking buckle (42) remains firmly connected to the switching element (41).
[0028] It may be preferred that the eccentric connecting ring (6) has a large ring (61) and a small ring (62), wherein the large ring (61) is placed on the outer circumference of the eccentric bushing (3), or fits together with the outer circumference of the eccentric bushing (3) over a certain clearance, i.e. can rotate coaxially asynchronously with the outer circumference of the eccentric bushing (3).
[0029] It may be preferred that one end of the telescopic connecting element (7) is coupled to the small ring (62) via a connecting bolt (71), and the other end of the telescopic connecting element (7) is connected to the locking bolt block (5).
[0030] With this design, a double synchronous locking arrangement is formed by the eccentric bushing (3), the locking key (4), the eccentric connecting ring (6), and the telescopic connecting element (7), providing a folding scooter device in which the top tube and the down tube can be locked or unlocked with a single actuation. This effectively solves the existing problem with the conventional folding scooter device with a double locking mechanism, which requires two separate acts, thus eliminating the cumbersome handling.
[0031] The locked and unlocked states are represented as follows: I. Locked Folding When the locking key (4) locks the top tube connected to the top tube coupling piece (1), the eccentric hole (31) of the eccentric bushing (3) comes close to the locking bolt block (5). This secures the top tube coupling piece (1) and the down tube coupling piece (2) by the locking bolt block (5), with the upper locking element (11) and the lower locking element (21) also being secured by the locking bolt block (5) to prevent relative rotation of the top tube coupling piece (1) and the down tube coupling piece (2). II. Unlocked State When the locking key (4) unlocks or releases the top tube connected to the top tube coupling piece (1), the eccentric hole (31) of the eccentric bushing (3) turns away from the locking bolt block (5). This releases the top tube coupling piece (1) and the down tube coupling piece (2) through the locking bolt block (5), allowing the top tube coupling piece (1) and down tube coupling piece (2) to rotate relative to each other, enabling the scooter to be folded.
[0032] In this configuration, the locking key (4) can be turned to simultaneously control the movement of the eccentric hole (31) of the eccentric bushing (3), thus driving the locking bolt block (5) via the drive mechanism. This allows the top tube and the down tube to be locked or unlocked with a single action, resulting in simplified operation, an improved user experience, and simultaneous safety during use of the scooter. The present utility model is described in the above sections based on the aforementioned embodiments; however, various improvements can be made and the components mentioned can be replaced by equivalents without altering the scope of the utility model.In particular, the features disclosed in the embodiments of the present utility model can be combined in any way, provided no mechanical conflicts arise. The omission of detailed descriptions of these combinations is solely for the purpose of brevity and resource conservation. In this context, the utility model is not limited to the specific embodiments disclosed herein, but can be varied in many ways within the scope of the disclosure.
Claims
[1] Folding kick scooter device with double synchronous locking mechanism, comprising a top tube coupling piece (1), a down tube coupling piece (2), an eccentric bushing (3), a locking key (4), a locking bolt block (5), an eccentric connecting ring (6), and a telescopic connecting element (7), wherein the top tube coupling piece (1) and the down tube coupling piece (2) are rotatably connected to each other via a connecting shaft (23), while the eccentric bushing (3) is mounted on the connecting shaft (23), and the locking key (4) is mounted on the eccentric bushing (3) or can rotate coaxially with the outer circumference of the eccentric bushing (3), while the eccentric connecting ring (6) is mounted on the eccentric bushing (3) or can rotate coaxially asynchronously with the outer circumference of the eccentric bushing (3), wherein the locking bolt block (5) is connected via the telescopic connecting element (7) is connected to the eccentric connecting ring (6), wherein the top tube coupling piece (1) and the down tube coupling piece (2) are locked by the locking bolt block (5) by bringing the eccentric hole (31) of the eccentric bushing (3) close to the locking bolt block (5) when the top tube is locked between the fixing key (4) and the top tube coupling piece (1), wherein the top tube coupling piece (1) and the down tube coupling piece (2) are unlocked by the locking bolt block (5) by turning the eccentric hole (31) of the eccentric bushing (3) away from the locking bolt block (5) when the top tube is unlocked, between the fixing key (4) and the top tube coupling piece (1). [2] Folding kick scooter with double synchronous locking mechanism according to claim 1, characterized by , that an upper locking element (11) with an upper tab (12) is attached to the front of the top tube coupling piece (1) in which an upper axle hole set (13) is formed. [3] Folding kick scooter with double synchronous locking mechanism according to claim 2, characterized by , that a lower locking element (21) with a lower tab (22) is attached to the front of the down tube coupling piece (2), with whose connecting shaft (23) the down tube coupling piece (2) is rotatably connected to the top tube coupling piece (1) through the upper axle hole set (13). [4] Folding kick scooter with double synchronous locking mechanism according to claim 3, characterized by , that the eccentric bushing (3) is formed with an eccentric hole (31) and also with a stop surface (32) on its outer circumference, wherein the eccentric hole (31) is placed on the connecting shaft (23), while the axis of the eccentric hole (31) remains parallel, i.e., not coaxial, relative to the axis of the outer circumference of the eccentric bushing (3). [5] Folding kick scooter with double synchronous locking mechanism according to claim 4, characterized by, that the fixing key (4) comprises a switching element (41), a locking buckle (42) and a bushing-specific mounting hole (43), wherein the outer circumference of the eccentric bushing (3) is inserted into the bushing-specific mounting hole (43), wherein the bushing-specific mounting hole (43) fits positively with the outer circle of the eccentric bushing (3). [6] Folding kick scooter with double synchronous locking mechanism according to claim 5, characterized by , that the eccentric connecting ring (6) has a large ring (61) and a small ring (62), wherein the large ring (61) is placed on the outer circumference of the eccentric bushing (3), or fits together with the outer circumference of the eccentric bushing (3) via a certain clearance, i.e. can rotate coaxially asynchronously with the outer circumference of the eccentric bushing (3). [7] Folding kick scooter with double synchronous locking mechanism according to claim 6, characterized by, that one end of the telescopic connecting element (7) is connected to the small ring (62) via a connecting bolt (71), and the other end of the telescopic connecting element (7) is connected to the locking bolt block (5).