Folding bicycle frame with locking structure

Abstract

The utility model discloses a folding frame with stop lock structure, including mainboard, the folding rod group is hinged on the mainboard, be provided with stop lock unit on the folding rod group or mainboard, stop lock unit includes fixed frame, the rotatory lock bar of sliding connection has on fixed frame, the rotatory lock bar is sheathed on the elastic piece, the elastic piece abuts fixed frame, the mainboard or folding rod group is provided with the lock hole on the position corresponding with stop lock unit under the folding state, when the frame is in the folding state, the lock hole and stop lock unit position correspond, the rotatory lock bar can be clamped and connect the lock hole. The utility model provides a folding frame with stop lock structure can simple the structure of stop lock unit, and more convenient operation, convenient operation can, and can reduce the replacement maintenance cost of subsequent stop lock unit.

Description

Technical Field

[0001] This utility model relates to the field of folding bicycle technology, and in particular to a folding bicycle frame with a locking structure. Background Technology

[0002] For example, publication number "CN120462559A" discloses "a folding mobility scooter with a long service life," including a folding frame, a front assembly, a seat assembly, a front wheel assembly, and a rear wheel assembly. The folding frame includes a front crossbeam, a mounting crossbeam, a front folding rod, a rear folding rod, a first hinge plate, a second hinge plate, a limiting block, and a locking assembly. The limiting block corresponds to the rear side of the second hinge plate and its lower end is fixed to the front folding rod. The upper end of the limiting block has a laterally protruding limiting plate, and the lower end surface of the limiting plate contacts the upper end surface of the rear folding rod. However, in practical applications, the locking and unlocking of this type is relatively cumbersome, and the structure of the locking mechanism is relatively complex, which is not conducive to subsequent maintenance and replacement, resulting in high repair costs. Summary of the Invention

[0003] In view of the problem mentioned in the background art that the locking mechanism of the existing technology is complex and not conducive to maintenance, this utility model provides a folding frame with a locking structure, which simplifies the structure of the locking unit, makes it easier to operate, and reduces the replacement and maintenance costs of the locking unit.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A folding bicycle frame with a locking structure includes a main board, a folding rod assembly hinged to the main board, and a locking unit provided on the folding rod assembly or the main board. The locking unit includes a fixed frame, a rotating locking rod slidably connected to the fixed frame, and an elastic element sleeved on the rotating locking rod, the elastic element abutting against the fixed frame. In the folded state, the main board or the folding rod assembly has a locking hole at a position corresponding to the locking unit. When the frame is in the folded state, the locking hole corresponds to the position of the locking unit, and the rotating locking rod can engage with the locking hole. A folding lever assembly is connected to the bottom of the motherboard. This assembly can be folded and unfolded, and includes, but is not limited to, cross-shaped, quadrilateral, and polygonal folding levers. The folding lever assembly connects to the motherboard and drives the motherboard to rise and fall during the folding and unfolding motion. A locking unit is provided on either the folding lever assembly or the motherboard. Conversely, a locking hole is provided on the motherboard or folding lever assembly without a locking unit. The folding lever assembly is relatively fixed to the motherboard through a locking connection with the locking hole. The locking unit is an external component, connected to the folding lever assembly or motherboard by bolts. The locking mechanism is located on the motherboard, facilitating installation and disassembly for easy maintenance. When the locking assembly is connected to the motherboard, a corresponding lock hole is provided on the folding rod assembly. When the folding rod assembly is in the folded state, the rotating locking rod in the locking unit can rotate and connect with the lock hole, thus creating a fixed connection between the folding rod assembly and the motherboard, preventing the folding rod assembly from unfolding again and ensuring the stability of the folded state. Conversely, a locking unit is provided on the folding rod assembly. During the folding and unfolding process, the locking unit performs synchronous action. The locking unit moves relative to the lock hole, and the rotating locking rod in the locking unit can rotate to connect and separate from the lock hole, thereby controlling whether the folding rod assembly can fold and unfold. The rotating locking rod can rotate, and the elastic element on the rotating locking rod can abut against the fixed frame, thus fixing one end of the elastic element while the other end abuts against the rotating locking rod, allowing the rotating locking rod to perform axial displacement, thereby squeezing the elastic element and generating an elastic restoring force. This causes the rotating locking rod to stably engage with the lock hole, and the rotating locking rod can only be separated from the lock hole by manual movement. This improves the security of the lock.

[0006] Preferably, the rotating locking rod includes a rotating rod and a locking rod, with an intermediate connecting rod between the rotating rod and the locking rod. The intermediate connecting rod connects the rotating rod and the locking rod, and the locking rod and the rotating rod are located on the same side of the intermediate connecting rod. The elastic element is sleeved on the rotating rod, and the locking rod can engage with the lock hole. The rotating locking rod includes a rotating rod, a locking rod, and an intermediate connecting rod, wherein the intermediate connecting rod is located between the rotating rod and the locking rod, and the locking rod and the rotating rod are located on the same side of the intermediate connecting rod. The rotating rod is located inside the fixed frame, and a retaining spring is provided on the rotating rod to abut against the elastic element. The retaining spring engages with the rotating rod, and during the axial movement of the rotating rod, it can compress the elastic element, thereby generating elastic force. The retaining spring can be replaced by an external washer or an integrally formed stepped surface, as long as it can provide abutment to the side of the elastic element away from the fixed frame. Because the locking rod and the rotating rod are located on the same side of the intermediate connecting rod, the elastic force generated by the elastic element can ensure a stable engaging connection between the locking rod and the lock hole.

[0007] Preferably, the folding rod assembly or main board has a positioning hole next to the locking unit, and the rotating locking rod can engage with the positioning hole. The positioning hole is located next to the locking unit; when the locking unit is on the folding rod assembly, the positioning hole is located on the folding rod assembly; when the locking unit is on the main board, the positioning hole is located on the main board. The rotating locking rod can engage with the positioning hole, thus preventing relative rotation of the rotating locking rod when the folding rod assembly is in the unfolded state, ensuring safety during use in the unfolded state.

[0008] Preferably, the folding rod assembly includes a fixed hinge rod and a detachable hinge rod. The fixed hinge rod is hinged to the main board, and the main board is provided with a hook. The detachable hinge rod can engage with the hook, and the locking unit is provided on the detachable hinge rod. The folding rod assembly consists of a fixed hinge rod and a detachable hinge rod. The fixed hinge rod is connected to the main board and is hinged to the main board. The fixed hinge rod does not separate from the main board during folding and unfolding, maintaining a constant connection. The hook on the main board is detachably connected to the detachable hinge rod, allowing the detachable hinge rod to disengage from the hook, thereby improving the freedom and flexibility of folding. In the unfolded state, the engagement between the detachable hinge rod and the hook ensures the stability of the folding rod assembly. The locking unit is provided on the detachable hinge rod, ensuring a stable connection between the detachable hinge rod and the main board in the folded state.

[0009] Preferably, the disassembly hinge includes side rods on both sides, and a locking link between the two side rods. The hook is located at the bottom of the main board, with its opening facing the fixed hinge. The locking link engages with the hook. The disassembly hinge includes side rods, with a locking link between them. The locking link is perpendicular to the axis of the side rods. The hook is located at the bottom of the main board, and the main board engages with the locking link. The opening of the hook is closer to the side opening of the fixed hinge for easy engagement with the locking link.

[0010] Preferably, two hooks are provided, each hook engaging with the side of the engaging link near the side rod. Having two hooks symmetrically positioned at the bottom of the main board ensures stable and uniform connection between the hooks and the engaging link.

[0011] Preferably, the fixed hinge and the detachable hinge are arranged crosswise, with a hinge point between them, allowing the fixed and detachable hinges to rotate around this hinge point. This crosswise arrangement of the fixed and detachable hinges, forming a hinge point at their intersection, ensures that the detachable hinge can rotate relative to the fixed hinge after separating from the hook. This guarantees that the position of the detachable hinge is constrained even in the folded state, and that the crosswise arrangement of the fixed and detachable hinges ensures the stability of the support in the unfolded state.

[0012] Preferably, the folding rod assembly is provided with anti-slip ends. Specifically, the anti-slip ends on the folding rod assembly include several raised strips on the end area of ​​the folding rod assembly that contacts the ground, which improves the reliability of contact and enhances stability when the entire frame is placed on the ground.

[0013] Preferably, the mainboard is provided with a handle plate. The handle plate includes a handle structure and a plate-like structure. The plate-like structure is connected to the mainboard to ensure the stability of the connection and to increase the available placement area. The handle structure is a hollowed-out part on the plate-like structure, which facilitates the user to control the folding and unfolding of the entire frame.

[0014] Preferably, the folding rod assembly is equipped with a roller unit. The roller unit on the folding rod assembly enables the frame to be easily moved and pushed, improving flexibility.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) It can improve the structural stability of the frame in the unfolded and folded state, the frame can achieve flexible state switching, the locking unit is more convenient to operate, and it is easier to maintain and replace later.

[0017] (2) It can improve the support stability of the folding rod group, facilitate the folding and unfolding states of the folding rod group, and improve the flexibility of operation. Attached Figure Description

[0018] Figure 1 This is an isometric drawing of this utility model.

[0019] Figure 2 yes Figure 1 A partially enlarged view of the abort lock unit.

[0020] Figure 3 yes Figure 2 Internal perspective view of the stop lock unit.

[0021] Figure 4 This is an isometric view of Example 2.

[0022] In the picture:

[0023] 1. Mainboard, 11. Lock hole, 12. Hook, 13. Handle plate;

[0024] 2 Folding rod assembly, 21 Positioning hole, 22 Fixed hinge rod, 23 Disassembly hinge rod, 231 Side rod, 232 Engaging connecting rod, 24 Hinge point, 25 Anti-slip end, 26 Roller unit;

[0025] 3. Locking unit, 31. Fixed frame, 32. Rotating locking rod, 321. Locking rod, 322. Rotating rod, 323. Intermediate connecting rod, 33. Elastic element. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1:

[0028] like Figure 1 , 2As shown in Figure 3, a folding frame with a locking structure includes a main board 1, a folding rod assembly 2 hinged to the main board 1, a locking unit 3 provided on the folding rod assembly 2, the locking unit 3 including a fixed frame 31, a rotating locking rod 32 slidably connected to the fixed frame 31, an elastic element 33 sleeved on the rotating locking rod 32, the elastic element 33 abutting against the fixed frame 31, the main board 1 is provided with a locking hole 11 at a position corresponding to the locking unit 3 in the folded state, when the frame is in the folded state, the locking hole 11 corresponds to the position of the locking unit 3, and the rotating locking rod 32 can engage with the locking hole 11. A folding rod assembly 2 is connected below the main board 1. The folding rod assembly 2 can be folded and unfolded. The folding rod assembly 2 includes, but is not limited to, cross-shaped folding rods, quadrilateral folding rods, and polygonal folding rods. The folding rod assembly 2 is connected to the main board 1, and it can cause the main board 1 to rise and fall during the folding and unfolding motion. A locking unit 3 is provided on either the folding rod assembly 2 or the main board 1. Conversely, a locking hole 11 is provided on the main board 1 or the folding rod assembly 2 where the locking unit 3 is not provided. A locking hole 11 is provided through the engaging connection between the folding rod assembly 2 and the locking hole 11, thereby achieving relative fixation between the folding rod assembly 2 and the main board 1. The locking unit 3 is an external component, connected to the folding rod assembly 2 or the main board 1 by bolts. On the main board 1, the locking assembly is installed for easy installation and disassembly, facilitating future maintenance. When the locking assembly is connected to the main board 1, a lock hole 11 is provided on the folding rod assembly 2. When the folding rod assembly 2 is in the folded state, the rotating locking rod 32 in the locking unit 3 can rotate and connect with the lock hole 11, thereby making the folding rod assembly 2 and the main board 1 fixedly connected, preventing the folding rod assembly 2 from unfolding again and ensuring the stability of the folded state. Conversely, a locking unit 3 is provided on the folding rod assembly 2. During the folding and unfolding process, the locking unit 3 performs synchronous action. The locking unit 3 moves relative to the lock hole 11, and the rotating locking rod 32 in the locking unit 3 can rotate to connect and separate from the lock hole 11, thereby controlling whether the folding rod assembly 2 can fold and unfold. The rotating locking rod 32 can rotate, and the elastic element 33 on the rotating locking rod 32 can abut against the fixed frame 31, so that one end of the elastic element 33 is fixed, while the other end abuts against the rotating locking rod 32, allowing the rotating locking rod 32 to move axially, thereby squeezing the elastic element 33. This causes the elastic element 33 to generate an elastic restoring force, which drives the rotating locking rod 32 to stably engage with the lock hole 11. The rotating locking rod 32 can only be separated from the lock hole 11 by manual disturbance. This improves the security of the locking mechanism.

[0029] like Figure 1 , 2As shown in Figure 3, the rotating locking rod 32 includes a rotating rod 322 and a locking rod 321. An intermediate connecting rod 323 is provided between the rotating rod 322 and the locking rod 321. The intermediate connecting rod 323 connects the rotating rod 322 and the locking rod 321. The locking rod 321 and the rotating rod 322 are located on the same side of the intermediate connecting rod 323. An elastic element 33 is sleeved on the rotating rod 322. The locking rod 321 can engage with the locking hole 11. The rotating locking rod 32 includes a rotating rod 322, a locking rod 321, and an intermediate connecting rod 323. The intermediate connecting rod 323 is located between the rotating rod 322 and the locking rod 321, and the locking rod 321 and the rotating rod 322 are located on the same side of the intermediate connecting rod 323. The rotating rod 322 is located inside the fixed frame 31. A retaining spring is provided on the rotating rod 322 to abut against the elastic element 33. The retaining spring engages with the rotating rod 322. During the axial movement of the rotating rod 322, it can compress the elastic element 33, thereby generating an elastic force. The retaining spring can be replaced by an external washer or an integrally formed stepped surface, as long as it can provide an abutment effect on the side of the elastic element 33 away from the fixed frame 31. Since the locking rod 321 and the rotating rod 322 are located on the same side of the intermediate connecting rod 323, the elastic force generated by the elastic element 33 can ensure a stable engaging connection between the locking rod 321 and the locking hole 11.

[0030] like Figure 1 , 2 As shown in Figure 3, the folding rod assembly 2 or the main board 1 has a positioning hole 21 next to the locking unit 3. The rotating locking rod 32 can engage with the positioning hole 21. The positioning hole 21 is provided next to the locking unit 3. When the locking unit 3 is installed on the folding rod assembly 2, the positioning hole 21 is provided on the folding rod assembly 2. When the locking unit 3 is installed on the main board 1, the positioning hole 21 is correspondingly installed on the main board 1. The rotating locking rod 32 can engage with the positioning hole 21. Therefore, when the folding rod assembly 2 is in the unfolded state, the engagement between the positioning hole 21 and the rotating locking rod 32 prevents relative rotation of the rotating locking rod 32, ensuring safety in the unfolded state.

[0031] Example 2:

[0032] like Figure 4As shown, the folding rod assembly 2 includes a fixed hinge rod 22 and a detachable hinge rod 23. The fixed hinge rod 22 is hinged to the main board 1, and the main board 1 is provided with a hook 12. The detachable hinge rod 23 can engage with the hook 12. A locking unit 3 is provided on the detachable hinge rod 23. The folding rod assembly 2 consists of a fixed hinge rod 22 and a detachable hinge rod 23. The fixed hinge rod 22 is connected to the main board 1 and is hinged to the main board 1. The fixed hinge rod 22 does not separate from the main board 1 during folding and unfolding, and always maintains a connected state. The hook 12 provided on the main board 1 is detachably connected to the detachable hinge rod 23. The detachable hinge rod 23 can be detached from the hook 12, thereby improving the freedom and flexibility of folding. In the unfolded state, the engagement connection between the detachable hinge rod 23 and the hook 12 ensures the stability of the folding rod assembly 2. The locking unit 3 is provided on the detachable hinge rod 23, thereby ensuring that the detachable hinge rod 23 maintains a stable connection with the main board 1 in the folded state.

[0033] like Figure 4 As shown, the disassembly hinge 23 includes side rods 231 on both sides and a locking link 232 between the two side rods 231. A hook 12 is located at the bottom of the main board 1, with its opening facing the fixed hinge 22. The locking link 232 can engage with the hook 12. The disassembly hinge 23 includes side rods 231, with a locking link 232 between them. The locking link 232 is perpendicular to the axis of the side rods 231. The hook 12 is located at the bottom of the main board 1, and the main board 1 engages with the locking link 232. The opening of the hook 12 is closer to the side of the fixed hinge 22 for easy engagement with the locking link 232.

[0034] like Figure 4 As shown, there are two hooks 12, and each hook 12 is engaged with the side of the engaging link 232 near the side rod 231. The two hooks 12 are symmetrically arranged at the bottom of the main board 1, thus ensuring the stability and uniformity of the connection between the hooks 12 and the engaging link 232.

[0035] like Figure 4 As shown, the fixed hinge rod 22 and the detachable hinge rod 23 are arranged crosswise, and a hinge point 24 is provided between the fixed hinge rod 22 and the detachable hinge rod 23. The fixed hinge rod 22 and the detachable hinge rod 23 can rotate around the hinge point 24. By arranging the fixed hinge rod 22 and the detachable hinge rod 23 crosswise, a hinge point 24 is formed at the intersection of the fixed hinge rod 22 and the detachable hinge rod 23. This allows the detachable hinge rod 23 to rotate relative to the fixed hinge rod 22 after it is separated from the hook 12. This ensures that the position of the detachable hinge rod 23 is constrained even in the folded state, and that the crosswise arrangement of the fixed hinge rod 22 and the detachable hinge rod 23 in the unfolded state ensures the stability of the support.

[0036] like Figure 4 As shown, the folding rod assembly 2 is provided with an anti-slip end 25. Specifically, the anti-slip end 25 on the folding rod assembly 2 has several raised strips on the end area of ​​the folding rod assembly 2 that contacts the ground, which improves the reliability of the contact and enhances the stability when the entire frame is placed on the ground.

[0037] like Figure 4 As shown, a handle plate 13 is provided on the main board 1. The handle plate 13 includes a handle structure and a plate structure. The plate structure is connected to the main board 1 to ensure the stability of the connection and to increase the available placement area. The handle structure is a part with a cutout on the plate structure, which makes it convenient for users to control the folding and unfolding of the entire frame through the handle structure.

[0038] like Figure 4 As shown, the folding rod assembly 2 is equipped with a roller unit. The roller unit on the folding rod assembly 2 enables the frame to be easily moved and pushed, improving flexibility.

[0039] In addition to the above structural features, this embodiment also includes a main board 1, on which a folding rod assembly 2 is hinged. A locking unit 3 is provided on the folding rod assembly 2. The locking unit 3 includes a fixed frame 31, on which a rotating locking rod 32 is slidably connected. An elastic element 33 is sleeved on the rotating locking rod 32, and the elastic element 33 abuts against the fixed frame 31. In the folded state, the main board 1 has a locking hole 11 at a position corresponding to the locking unit 3. When the frame is folded, the locking hole 11 corresponds to the locking unit 3, and the rotating locking rod 32 can engage with the locking hole 11. The rotating locking rod 32 includes a rotating rod 322 and a locking rod 321. A connecting rod is provided between the rotating rod 322 and the locking rod 321, connecting the rotating rod 322 and the locking rod 321. The locking rod 321 and the rotating rod 322 are located on the same side of the connecting rod. The elastic element 33 is sleeved on the rotating rod 322, and the locking rod 321 can engage with the locking hole 11. The folding rod assembly 2 or the main board 1 is provided with a positioning hole 21 next to the locking unit 3. Rotating the locking rod 32 can engage with the positioning hole 21.

[0040] A folding rod assembly 2 is connected below the main board 1. The folding rod assembly 2 can be folded and unfolded. The folding rod assembly 2 includes, but is not limited to, cross-shaped folding rods, quadrilateral folding rods, and polygonal folding rods. The folding rod assembly 2 is connected to the main board 1, and it can cause the main board 1 to rise and fall during the folding and unfolding motion. A locking unit 3 is provided on either the folding rod assembly 2 or the main board 1. Conversely, a locking hole 11 is provided on the main board 1 or the folding rod assembly 2 where the locking unit 3 is not provided. A locking hole 11 is provided through the engaging connection between the folding rod assembly 2 and the locking hole 11, thereby achieving relative fixation between the folding rod assembly 2 and the main board 1. The locking unit 3 is an external component, connected to the folding rod assembly 2 or the main board 1 by bolts. On the main board 1, the locking assembly is installed for easy installation and disassembly, facilitating future maintenance. When the locking assembly is connected to the main board 1, a lock hole 11 is provided on the folding rod assembly 2. When the folding rod assembly 2 is in the folded state, the rotating locking rod 32 in the locking unit 3 can rotate and connect with the lock hole 11, thereby making the folding rod assembly 2 and the main board 1 fixedly connected, preventing the folding rod assembly 2 from unfolding again and ensuring the stability of the folded state. Conversely, a locking unit 3 is provided on the folding rod assembly 2. During the folding and unfolding process, the locking unit 3 performs synchronous action. The locking unit 3 moves relative to the lock hole 11, and the rotating locking rod 32 in the locking unit 3 can rotate to connect and separate from the lock hole 11, thereby controlling whether the folding rod assembly 2 can fold and unfold. The rotating locking rod 32 can rotate, and the elastic element 33 on the rotating locking rod 32 can abut against the fixed frame 31, so that one end of the elastic element 33 is fixed, while the other end abuts against the rotating locking rod 32, allowing the rotating locking rod 32 to move axially, thereby squeezing the elastic element 33. This causes the elastic element 33 to generate an elastic restoring force, which drives the rotating locking rod 32 to stably engage with the lock hole 11. The rotating locking rod 32 can only be separated from the lock hole 11 by manual disturbance. This improves the security of the locking mechanism.

[0041] The rotating locking rod 32 includes a rotating rod 322, a locking rod 321, and a connecting rod. The connecting rod is positioned between the rotating rod 322 and the locking rod 321, and the locking rod 321 and the rotating rod 322 are located on the same side of the connecting rod. The rotating rod 322 is located inside the fixed frame 31. A retaining spring is provided on the rotating rod 322 to abut against the elastic element 33. The retaining spring engages with the rotating rod 322. During the axial movement of the rotating rod 322, it can compress the elastic element 33, thereby generating an elastic force. The retaining spring can be replaced by an external washer or an integrally formed stepped surface, as long as it can provide an abutment effect on the side of the elastic element 33 away from the fixed frame 31. Since the locking rod 321 and the rotating rod 322 are located on the same side of the connecting rod, the elastic force generated by the elastic element 33 can ensure a stable engaging connection between the locking rod 321 and the locking hole 11. A positioning hole 21 is provided next to the locking unit 3. When the locking unit 3 is set on the folding rod assembly 2, the positioning hole 21 is provided on the folding rod assembly 2. When the locking unit 3 is set on the main board 1, the positioning hole 21 is set on the main board 1. The rotating locking rod 32 can be engaged with the positioning hole 21. Thus, when the folding rod assembly 2 is in the unfolded state, the engagement between the positioning hole 21 and the rotating locking rod 32 prevents the rotating locking rod 32 from rotating relative to the main board 1, ensuring the safety of use in the unfolded state.

Claims

1. A folding bicycle frame with a locking structure, characterized in that, The system includes a main board with a folding rod assembly hinged to it. A locking unit is provided on the folding rod assembly or the main board. The locking unit includes a fixed frame with a rotating locking rod slidably connected to it. An elastic element is sleeved on the rotating locking rod, and the elastic element abuts against the fixed frame. In the folded state, the main board or folding rod assembly has a locking hole at a position corresponding to the locking unit. When the frame is folded, the locking hole corresponds to the locking unit, and the rotating locking rod can engage with the locking hole.

2. A folding frame with a locking structure according to claim 1, characterized in that, The rotating locking rod includes a rotating rod and a locking rod, with an intermediate connecting rod between the rotating rod and the locking rod. The intermediate connecting rod connects the rotating rod and the locking rod, and the locking rod and the rotating rod are located on the same side of the intermediate connecting rod. The elastic element is sleeved on the rotating rod, and the locking rod can engage with the lock hole.

3. A folding frame with a locking structure according to claim 1, characterized in that, The folding rod assembly or main board is provided with a positioning hole next to the locking unit, and the rotating locking rod can engage with the positioning hole.

4. A folding bicycle frame with a locking structure according to claim 1, characterized in that, The folding rod assembly includes a fixed hinge rod and a detachable hinge rod. The fixed hinge rod is hinged to the main board, and the main board is provided with a hook. The detachable hinge rod can engage with the hook.

5. A folding frame with a locking structure according to claim 4, characterized in that, The disassembly hinge includes side rods on both sides, and a locking link between the two side rods. The hook is located at the bottom of the motherboard, with its opening facing the fixed hinge. The locking link can engage the hook.

6. A folding bicycle frame with a locking structure according to claim 5, characterized in that, The hook is provided in two parts, and the two hooks are respectively engaged and connected to the side of the locking link near the side rod.

7. A folding frame with a locking structure according to claim 4, characterized in that, The fixed hinge and the disassembly hinge are arranged in a cross manner, and a hinge point is provided between the fixed hinge and the disassembly hinge. The fixed hinge and the disassembly hinge can rotate around the hinge point.

8. A folding frame with a locking structure according to any one of claims 1-7, characterized in that, The folding rod assembly is equipped with anti-slip ends.

9. A folding frame with a locking structure according to any one of claims 1-7, characterized in that, The motherboard is equipped with a handle plate.

10. A folding frame with a locking structure according to any one of claims 1-7, characterized in that, The folding rod assembly is equipped with a roller unit.

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