A locking structure for the folding part of a folding bicycle

Abstract

This utility model discloses a locking structure for the folding part of a folding bicycle, including a folding buckle and a locking buckle. Two folding buckles are provided; one folding buckle connects to the first folding part between the headstock connecting tube and the front frame seat tube, and the other folding buckle connects to the second folding part at a node of the front frame main beam. The folding buckle can lock and unlock the first and second folding parts. The locking buckle is connected to the fastening sleeve of the seat connecting tube and has a reverse buckle portion, which can be engaged and disengaged from the rear frame connecting part by swinging and rotating. This utility model provides two folding buckles and one locking buckle to lock the first folding part, the second folding part, and the connection between the rear frame and the seat connecting tube of the folding bicycle, respectively. This multi-point locking ensures the structural stability and safety of the folding bicycle in the unfolded state, effectively avoiding safety hazards caused by loosening of the folding parts during riding.

Description

Technical Field

[0001] This utility model relates to bicycles, specifically to a locking structure for the folding part of a folding bicycle. Background Technology

[0002] With the acceleration of urbanization and people's increasing demands for convenient travel, folding bicycles have gained popularity among consumers due to their small footprint and portability. The folding performance of a folding bicycle is one of its core competitive advantages, and the locking structure of the folding mechanism directly affects the bicycle's safety, ease of folding, and structural stability.

[0003] Currently, the folding mechanism locking structures of existing folding bicycles on the market have many shortcomings. Some locking structures lack sufficient locking force, making them prone to loosening during riding and posing a safety hazard to riders; some locking structures are complex to operate, with cumbersome folding and unfolding processes requiring tools or considerable effort, reducing ease of use; and some locking structures are poorly designed, prone to wear and jamming after long-term use, affecting the lifespan and reliability of the locking mechanism.

[0004] Therefore, developing a locking structure for the folding section of a folding bicycle that is securely locked, easy to operate, and structurally stable and reliable has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a locking structure for the folding section of a folding bicycle. This locking structure enables the folding section of the bicycle to be securely locked, is easy to operate, and improves the safety and convenience of using the folding bicycle.

[0006] To solve the above-mentioned technical problems, this utility model provides the following solution: A locking structure for the folding part of a folding bicycle, comprising:

[0007] The folding buckle has two parts. One folding buckle is connected to the first folding part between the front connecting tube and the front frame upright tube, and the other folding buckle is connected to the second folding part of one node of the front frame main beam. The folding buckle can lock and unlock the first folding part and the second folding part.

[0008] The latch, which is connected to the fastening sleeve of the seat connecting tube, has an inverted part that can be engaged and disengaged from the connecting part of the rear frame by swinging and rotating.

[0009] Furthermore, the folding buckle is a hand-tightening bolt structure, with the bolt part connected to the handle and a clamping plate movably fitted in the unthreaded area of ​​the connection.

[0010] Furthermore, the clamp has an open U-shaped groove.

[0011] Furthermore, the handle is a cloverleaf-shaped handle with multiple perforated holes.

[0012] Furthermore, the latch includes:

[0013] A lock head that is connected at one end to a fastening sleeve;

[0014] A locking rod connected to a lock head, wherein the buckle portion is vertically and rotatably sleeved onto the locking rod shaft;

[0015] A pressure handle is hinged to the other end of the locking rod, wherein the thickness of the pressure handle decreases from the hinged end to the middle region of the pressure handle;

[0016] A spring is fitted onto the locking rod, with one end abutting against the lock head and the other end abutting against the buckle.

[0017] Furthermore, the undercut portion includes:

[0018] A barb fitted onto the locking rod;

[0019] The handle body is connected and fixed with the barb.

[0020] Furthermore, a C-shaped hook is provided at the end of the handle body, and a circular cylinder is fixed inside the C-shaped hook.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model is equipped with two folding buckles and one locking buckle, which respectively lock the first folding part, the second folding part, and the connection between the rear frame and the seat connecting tube of the folding bicycle. The multi-point locking ensures the structural stability and safety of the folding bicycle in the unfolded state, and effectively avoids the safety hazards caused by the loosening of the folding part during riding.

[0023] 2. The folding buckle of this utility model adopts a hand-tightening bolt structure, combined with a plum blossom-shaped handle and a clamp plate with an open U-shaped groove, so that the locking and unlocking of the folding part does not require tools, making the operation simple, labor-saving, and with good locking effect.

[0024] 3. The locking mechanism of this utility model achieves secure locking and convenient unlocking of the rear frame connection through the cooperation of springs, barbs and other structures. The elasticity of the spring ensures the reliability of the locking state, and the design of the pressure handle makes the unlocking operation effortless and convenient.

[0025] 4. The components of this utility model are reasonably designed, such as the hollow holes on the handle, the C-shaped hook at the end of the handle body, and the circular cylinder, which not only improve the convenience and comfort of operation, but also reduce the weight of the overall structure, which is in line with the development trend of lightweight folding bicycles. Attached Figure Description

[0026] Figure 1 This is a structural diagram showing the installation of two folding buckles and one locking buckle on a folding bicycle according to this utility model.

[0027] Figure 2 This is a three-dimensional structural diagram of the folding buckle of this utility model.

[0028] Figure 3 This is an enlarged view of the installation positions of the two folding buckles of this utility model.

[0029] Figure 4 for Figure 3 Enlarged view of the folding buckle at part A.

[0030] Figure 5 for Figure 3 Enlarged view of the folding buckle at part B.

[0031] Figure 6 This is a three-dimensional structural diagram of the latch of this utility model.

[0032] Figure 7 This is a diagram showing the first state of the rear frame after the latch of this utility model has been unlocked and is disengaged.

[0033] Figure 8 This is a second state diagram of the rear frame disengaged after the latch of this utility model is unlocked.

[0034] Figure 9 This is a diagram showing the rear frame after the latch of this utility model has been unlocked and the frame is fully folded.

[0035] The following components are marked in the attached diagram: 1. Locking buckle; 2. Seat connecting tube; 3. Seat sleeve; 4. Headboard connecting tube; 5. Folding buckle; 6. Main beam of frame; 7. Connecting part; 8. Oil injection hole; 11. Pressure handle; 12. Through hole; 13. Locking rod; 14. Spring; 15. Lock head; 16. Circular cylinder; 17. Handle body; 18. Barb; 51. Handle; 52. Clamping plate; 53. Bolt part. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0037] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] Example 1: The specific structure of this utility model is as follows:

[0039] Please refer to the appendix. Figure 1-9 The present invention relates to a locking structure for the folding part of a folding bicycle, comprising a folding buckle 5 and a locking buckle 1.

[0040] Two folding buckles 5 are provided. One folding buckle 5 is connected to the first folding part between the front connecting pipe 4 and the front frame upright tube, and the other folding buckle 5 is connected to the second folding part at one node of the front frame main beam 6. The folding buckle 5 can lock and unlock the first and second folding parts. The first and second folding parts have the same structure. The front connecting pipe 4 and the front frame upright tube are connected by a pivot. Both the front connecting pipe 4 and the front frame upright tube are provided with protruding rafters at the connection points. Locking the folding buckle 5 can clamp the upper and lower rafters together.

[0041] The latch 1 is connected to the fastening sleeve of the seat connecting tube 2, and has a reverse buckle portion that can be engaged and disengaged from the connecting part 7 of the rear frame by swinging and rotating. Figure 1 As shown, the seat connecting tube 2 is inserted into the seat sleeve 3. The height of the seat can be adjusted by raising and lowering the seat connecting tube 2. The opening of the seat connecting tube 2 is set as a claw opening, and a fastening sleeve is fitted at the claw opening. The locking and unlocking of the fastening sleeve can control the locking and unlocking of the claw opening.

[0042] The folding buckle 5 is a hand-tightening bolt structure, with its bolt part 53 connected to the handle 51 and a clamping plate 52 movably sleeved in the unthreaded area of ​​the connection.

[0043] The clamping plate 52 has an open U-shaped groove that runs through both ends of the clamping plate 52. The open U-shaped groove has a trapezoidal structure and is wider on the outside and narrower on the inside. This structure makes it easier to lock the upper and lower rafters tighter and can also accommodate rafters of different thicknesses.

[0044] The handle 51 is a plum blossom-shaped handle with multiple hollow holes. The hollow holes are designed to reduce the material used in the handle and further reduce costs.

[0045] The latch 1 includes:

[0046] A lock head 15 is connected to a fastening sleeve at one end. The lock head 15 has a round head structure and a through cavity that runs through both sides.

[0047] The locking rod 13 is connected to the lock head 15. The undercut portion is vertically and rotatably sleeved on the rod portion of the locking rod 13. The locking rod 13 is threadedly connected to the lock head 15. The through cavity meets the movement distance of the locking rod 13 so as to adapt to fastening sleeves of different diameters.

[0048] A pressure handle 11 is hinged to the other end of the locking rod 13. The pressure handle 11 is thinned from the hinge end to the middle region of the pressure handle 11. A through hole 12 is provided at the outer end of the pressure handle 11.

[0049] Spring 14 is fitted onto the locking rod 13, with one end abutting against the lock head 15 and the other end abutting against the buckle portion.

[0050] The undercut portion includes:

[0051] The hook 18 is sleeved on the rod of the locking rod 13. Correspondingly, the lower end of the connecting part 7 of the rear frame is provided with a buckle groove. The buckle groove is also a buckle structure. The hook 18 is buckled into the buckle groove, and then the pressure handle 11 is pushed towards the rear frame to lock the rear frame.

[0052] The handle body 17 is connected and fixed to the barb 18. The end of the handle body 17 is provided with a C-shaped hook, and a cylindrical body 16 is fixed inside the C-shaped hook. The cylindrical body 16 is designed to facilitate user operation.

[0053] Example 2:

[0054] The working principle of this utility model is as follows: When the folding bicycle needs to be unfolded for use, first unfold the first folding part and the second folding part, and then rotate the handles 51 of the two folding buckles 5 respectively, so that the bolt part 53 drives the clamping plate 52 to clamp the protrusions of the first folding part and the second folding part, thereby fixing the front frame.

[0055] Next, rotate the pressure handle 11 clockwise. The pressure handle 11 drives the locking rod 13 to rotate, shortening the distance between the lock head 15 and the pressure handle 11, thereby locking the fastening sleeve. Then, press the pressure handle 11 to the side, bringing the pressure handle 11 and the tube body closer together, thus completing the fixing of the seat connecting tube 2.

[0056] Next, attach the connecting part 7 of the rear frame to the hook 18, and swing the cylindrical body 16 towards the rear frame so that the hook 18 is engaged in the buckle slot. After completing the frame fixing, the folding bicycle is in the unfolded and rideable state.

[0057] When you need to fold the bicycle, first rotate the handles 51 of the two folding buckles 5 in the opposite direction to loosen the clamps on the first and second folding parts, so that the front frame can be folded.

[0058] like Figure 7-9 , Figure 7 This is a diagram showing the first state of the rear frame after the latch of this utility model has been unlocked and is disengaged. Figure 8 This is a second state diagram of the rear frame disengaged after the latch of this utility model is unlocked. Figure 9 This is a diagram showing the rear frame fully folded after the lock of this utility model is unlocked. Pressing the handle 11 of the lock 1 causes the handle 11 to move towards the seat sleeve 3, causing the hook 18 to swing and rotate away from the connecting part 7 of the rear frame, thereby unlocking the rear frame and completing the folding of the bicycle.

[0059] Example 3:

[0060] like Figure 4 As shown, each folding section of the folding bicycle is equipped with an oil injection hole 8, which connects to the outside of the folding section. Oil is injected through the oil injection hole 8 to lubricate and prevent rust. After oiling, the folding buckle 5 is easier to tighten and loosen.

[0061] In summary, this utility model is equipped with two folding buckles and one locking buckle, which respectively lock the first folding part, the second folding part, and the connection between the rear frame and the seat connecting tube of the folding bicycle. The multi-point locking ensures the structural stability and safety of the folding bicycle in the unfolded state, and effectively avoids the safety hazards caused by the loosening of the folding part during riding.

[0062] This utility model of folding buckle adopts a hand-tightening bolt structure, combined with a plum blossom-shaped handle and a clamp plate with an open U-shaped groove, so that the locking and unlocking of the folding part can be carried out without the aid of tools, making the operation simple, labor-saving, and with good locking effect.

[0063] This utility model lock, through the cooperation of springs, barbs and other structures, achieves a firm locking and convenient unlocking of the rear frame connection. The elasticity of the spring ensures the reliability of the locking state, and the design of the pressure handle makes the unlocking operation effortless and convenient.

[0064] The components of this utility model are rationally designed, such as the hollow holes on the handle, the C-shaped hook at the end of the handle body, and the cylindrical body. These features not only improve the convenience and comfort of operation but also reduce the overall weight, which is in line with the trend of lightweight folding bicycles.

[0065] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A lock catch structure of a folding portion of a folding bicycle, characterized by comprising: include: Folding buckle (5) is provided in two parts. One of the folding buckles (5) is connected to the first folding part between the front connecting tube and the front frame upright tube, and the other folding buckle (5) is connected to the second folding part of one node of the front frame main beam. The folding buckle (5) can lock and unlock the first folding part and the second folding part. The latch (1) is connected to the fastening sleeve of the seat connecting tube and has a buckle that can be engaged and disengaged from the connecting part (7) of the rear frame by swinging and rotating.

2. The locking structure of the folding part of a folding bicycle according to claim 1, characterized in that, The folding buckle (5) is a hand-tightening bolt structure, with its bolt part (53) connected to the handle (51) and a clamping plate (52) movably fitted in the unthreaded area of ​​the connection.

3. The locking structure of the folding part of a folding bicycle according to claim 2, characterized in that, The clamp (52) has an open U-shaped groove.

4. The locking structure of the folding part of a folding bicycle according to claim 2, characterized in that, The handle (51) is a plum blossom-shaped handle with multiple hollowed-out holes.

5. The locking structure of the folding part of a folding bicycle according to claim 1, characterized in that, The latch (1) includes: A lock head (15) with one end connected to a fastening sleeve; The locking rod (13) is connected to the lock head (15), and the buckle is vertically and rotatably sleeved on the rod part of the locking rod (13); A pressure handle (11) is hinged to the other end of the locking rod (13), and the area from the hinge end of the pressure handle (11) to the middle of the pressure handle (11) is thinned. A spring (14) is fitted onto the locking rod (13), with one end abutting against the lock head (15) and the other end abutting against the buckle.

6. The locking structure of the folding part of a folding bicycle according to claim 5, characterized in that, The undercut portion includes: A barb (18) is sleeved on the rod of the locking rod (13); The handle body (17) is connected and fixed to the barb (18).

7. The locking structure for the folding part of a folding bicycle according to claim 6, characterized in that, The end of the handle body (17) is provided with a C-shaped hook, and a circular cylinder (16) is fixed inside the C-shaped hook.

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