A bicycle folder

Abstract

The utility model discloses a bicycle folder, which is movably connected between pipe joint I and pipe joint II through a hinged member; a first pressing handle is hingedly arranged in pipe joint I; a positioning groove is arranged on the first pressing handle; an arc-shaped swing positioning head is arranged on pipe joint II corresponding to the positioning groove; when the first pressing handle is in a pressing locking state, the arc-shaped swing positioning head is horizontally inserted into the positioning groove; a second pressing handle is hingedly arranged on the first pressing handle; an elastic component is arranged between the second pressing handle and the first pressing handle; a locking hook is further arranged on the first pressing handle; and a fixed-point hooking object is arranged in pipe joint II in cooperation with the locking hook. The utility model can realize the opening and closing control of the folder by pressing, and is convenient and fast to operate, does not need to be equipped with special tools, and the double-locking structure can ensure the stability of the locking state.

Description

Technical Field

[0001] This utility model relates to the field of bicycle accessories technology, and in particular to a bicycle folding device. Background Technology

[0002] A bicycle folding mechanism is a special mechanical hinge mechanism mounted on the frame that allows the frame to detach and fold at a specific location, thereby significantly reducing the overall size of the bicycle and making it easier to carry and store.

[0003] The bicycle folding mechanism is the core component of a folding bicycle, directly determining the vehicle's rigidity, safety, and ease of folding.

[0004] This technical solution targets a front-mounted bicycle folding mechanism, which is usually installed in the middle of the top tube or down tube of a bicycle. It divides the entire frame in two and is the key to achieving minimizing the size of the folding mechanism.

[0005] However, current folding mechanisms have the following structures: 1. Lever / Wrench-type quick-release: This type of bicycle folding mechanism uses a long lever and an eccentric cam structure to generate a large clamping force to lock the joint. It requires considerable force to close, but its stability is poor after locking, posing a risk of loosening. Regular inspection is necessary, and high manufacturing precision is required.

[0006] 2. Bolt-locking type: This type of folding mechanism uses one or more Allen bolts (or special bolts) to lock the joint. Tools (such as Allen wrenches) are required for tightening and loosening. Its disadvantages are that operation is relatively slow and tools must be carried at all times, making it very inconvenient to use.

[0007] In view of the technical drawbacks of the above-mentioned technical solutions, as people skilled in the art, there is an urgent need to design a bicycle folding device that can be structurally improved and can achieve fast and convenient bicycle folding, locking and fixing without the need for external tools. Utility Model Content

[0008] To overcome the shortcomings of existing technology, this utility model provides a bicycle folding device, which is installed on the top tube or bottom tube of the frame. The folding device is locked through multiple locking points, which not only makes it easy to operate, but also improves the locking stability.

[0009] The technical solution adopted by this utility model to solve its technical problem is: A bicycle folding device includes two tubular joints, tubular joint I and tubular joint II being movably connected by a hinge; The pipe fitting connector I is hinged with a primary pressing handle, which has a positioning groove. Corresponding to the positioning groove, an arc-shaped swing positioning head is provided on the pipe fitting connector II. When the primary pressing handle is locked, the arc-shaped swing positioning head is horizontally inserted into the positioning groove. The middle area of ​​the primary pressing handle and the secondary pressing handle is hinged by a central hinge shaft. On the left side of the central hinge shaft, an elastic component is provided between the secondary pressing handle and the primary pressing handle. On the right side of the central hinge shaft, a locking hook is provided on the primary pressing handle. A fixed hook is provided in the pipe fitting connector II in conjunction with the locking hook.

[0010] The pipe fitting connector II is provided with a rotating shaft, and the arc-shaped swing positioning head is fixed on the rotating shaft. A torsion spring is provided on the rotating shaft, and the arc-shaped swing positioning head is reset after horizontal swinging through the torsion spring.

[0011] The positioning groove is larger than the semi-circular arc groove, and the arc-shaped swing positioning head is smaller than the semi-circular structure. When the positioning groove and the arc-shaped swing positioning head are combined in a swinging state, the two cannot be separated by lateral movement.

[0012] The primary pressing handle is provided with a recessed avoidance part, and the elastic component is located inside the recessed avoidance part. This design enables the primary pressing handle and the secondary pressing handle to be set in an external horizontal position after locking.

[0013] The pipe fittings I and II are equipped with folding compartments, and both the primary and secondary pressing handles are located within these folding compartments. When pipe fittings I and II are folded and locked, they are concealed within the folding compartments.

[0014] The fixed hook is a screw, which is threaded and fixed inside the pipe fitting joint II. The nut on the screw cooperates with the locking hook to achieve hook fixation.

[0015] The arc-shaped swing positioning head adopts an umbrella-shaped screw, which is threaded onto the rotating shaft. The umbrella-shaped nut on the umbrella-shaped screw cooperates with the positioning groove to achieve locking and fixation.

[0016] The beneficial effects of this utility model after adopting the above structure are described as follows: In this utility model, pipe fitting joint I and pipe fitting joint II are movably connected by a hinge; a primary pressing handle is hinged inside pipe fitting joint I, and a positioning groove is provided on the primary pressing handle. Corresponding to the positioning groove, an arc-shaped swing positioning head is provided on pipe fitting joint II. When the primary pressing handle is pressed and locked, the arc-shaped swing positioning head is horizontally inserted into the positioning groove; a secondary pressing handle is hinged to the primary pressing handle, and an elastic component is provided between the secondary pressing handle and the primary pressing handle. A locking hook is also provided on the primary pressing handle, and a fixed hook is provided inside pipe fitting joint II in conjunction with the locking hook. By pressing the right end of the secondary pressing handle, the locking hook engages with the fixed hook, while the arc-shaped swing positioning head engages with the positioning groove, thus locking the two positioning points. By pressing the left end of the secondary pressing handle, the locking hook disengages from the fixed hook, and pulling the secondary pressing handle outward causes it to swing the primary pressing handle, while the arc-shaped swing positioning head disengages from the positioning groove, thus opening the two positioning points sequentially. This invention uses a pressing method to control the opening and closing of the folding device, making it convenient and quick to operate without the need for special tools. The double-locking structure ensures the stability of the locked state, making it an ideal bicycle folding device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the appearance and structure of this utility model; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction (locked state); Figure 4 This is a schematic diagram of the opening structure of the utility model; In the attached diagram: 1. Pipe fitting joint I; 10. Hinge shaft I; 2. Pipe fitting joint II; 21. Screw; 22. Nut; 3. Folding compartment; 4. Primary pressing handle; 41. Positioning groove; 42. Recessed clearance part; 43. End upturned part; 44. Middle hinge shaft; 5. Secondary pressing handle; 6. Hinge component; 7. Rotating shaft; 71. Torsion spring; 72. Umbrella-shaped screw; 8. Locking hook; 81. Hook point; 9. Spring. Detailed Implementation

[0018] The present invention will be described in detail below through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. However, it should be noted that the specific embodiments described below do not limit the technical solution. Those skilled in the art can make further technical extensions under the guidance of the following technical solutions. The scope of protection of this patent application is determined by the claims.

[0019] Example 1: A bicycle folding device includes two tubular joints, namely tubular joint I1 and tubular joint II2, which are movably connected by a hinge 6.

[0020] A folding compartment 3 is provided at the junction of pipe fitting joint I1 and pipe fitting joint II2. A primary pressing handle 4 is hinged within the folding compartment 3 via a hinge shaft I10. The primary pressing handle 4 has a positioning groove 41. A rotating shaft 7 is correspondingly positioned within the pipe fitting joint II2, and an arc-shaped swing positioning head 72 is fixed to the rotating shaft 71. A torsion spring 71 is also provided on the rotating shaft 7, enabling the arc-shaped swing positioning head 72 to automatically reset after horizontal swinging. The function of the arc-shaped swing positioning head 72 is that when the primary pressing handle 4 is in the pressed-locked state, the arc-shaped swing positioning head 72 is horizontally inserted into the positioning groove 41. Furthermore, the positioning groove 41 is designed to be larger than a semi-circular arc, while the arc-shaped swing positioning head 71 is smaller than a semi-circular structure. When the positioning groove 41 and the arc-shaped swing positioning head 72 are engaged in a swinging state, they cannot be disengaged by lateral movement. This design increases the stability of the combination of the positioning groove 41 and the arc-shaped swing positioning head 72.

[0021] The intermediate area of ​​the primary pressing handle 4 and the secondary pressing handle 5 is hinged by a central hinge shaft 44. On the left side of the central hinge shaft 44, a spring 9 is provided between the secondary pressing handle 5 and the primary pressing handle 4 as an elastic component. On the right side of the central hinge shaft 44, a locking hook 8 is provided on the primary pressing handle 4. The locking hook 8 has a U-shaped structure and a hook point 81 at its bottom. The hook point 81 allows for the fixed-point hooking of an object within the pipe fitting joint II2. In this embodiment, the fixed-point hook is a screw 21, which is threaded and fixed within the pipe fitting joint II2. The nut on the screw 21 cooperates with the hook point 81 on the locking hook 8 to achieve hooking and fixation.

[0022] Furthermore, this utility model features a recessed clearance portion 42 on the primary pressing handle 4, with the spring 9 disposed inside the recessed clearance portion 42. This design enables the primary pressing handle 4 and the secondary pressing handle 5 to be externally horizontally positioned after locking. Figure 1 , 3 As shown in Figure 4, both the primary pressing handle 4 and the secondary pressing handle 5 are located inside the folding compartment. After being folded and locked, they are hidden inside the folding compartment 3. The outer side has a flat structure, which has a good appearance and will not scratch external objects.

[0023] The arc-shaped swing positioning head 72 adopts an umbrella-shaped screw, which is threaded onto the rotating shaft 7. The umbrella-shaped nut on the umbrella-shaped screw cooperates with the positioning groove 41 to achieve locking and fixation.

[0024] When this utility model is used, pipe fitting joint I1 and pipe fitting joint II2 are respectively fixed at the folding and dividing points of the frame tube. They can be fixed to the tube by welding. When fixed to a carbon fiber frame, pipe fitting joint I1 and pipe fitting joint II2 can be fixed to the tube by wrapping or bonding.

[0025] When the non-folding function is activated, the operator applies force to press the right end of the secondary pressing handle 5, which engages with the screw 21 via the locking hook 81. Simultaneously, the arc-shaped swing positioning head 72 engages with the positioning groove 41 while rotating, thus locking the two positioning points. When the folding function is activated, the operator applies force to press the left end of the secondary pressing handle 5, causing the right end of the secondary pressing handle 5 to rotate upwards. The locking hook 81 on the secondary pressing handle 5 disengages from the fixed hook. Continuing to pull the secondary pressing handle 5 outwards causes it to pull the primary pressing handle 4 to swing. Simultaneously, the arc-shaped swing positioning head 72 disengages from the positioning groove 41 under the drive of the torsion spring 71 along with the rotating shaft 7, thereby opening the two positioning points sequentially.

[0026] This invention uses a pressing method to control the opening and closing of the entire folding mechanism, making it convenient and quick to operate without the need for special tools. The double-locking structure ensures the stability of the locked state, making it an ideal bicycle folding mechanism.

Claims

1. A bicycle folding device, characterized in that: It includes two pipe fittings, pipe fitting I and pipe fitting II are movably connected by a hinge; The pipe fitting connector I is hinged with a primary pressing handle, which has a positioning groove. Corresponding to the positioning groove, an arc-shaped swing positioning head is provided on the pipe fitting connector II. When the primary pressing handle is locked, the arc-shaped swing positioning head is horizontally inserted into the positioning groove. The middle area of ​​the primary pressing handle and the secondary pressing handle is hinged by a central hinge shaft. On the left side of the central hinge shaft, an elastic component is provided between the secondary pressing handle and the primary pressing handle. On the right side of the central hinge shaft, a locking hook is provided on the primary pressing handle. A fixed hook is provided in the pipe fitting connector II in conjunction with the locking hook.

2. A bicycle folding device as described in claim 1, characterized in that: The pipe fitting connector II is provided with a rotating shaft, and the arc-shaped swing positioning head is fixed on the rotating shaft. A torsion spring is provided on the rotating shaft, and the arc-shaped swing positioning head is reset after horizontal swinging through the torsion spring.

3. A bicycle folding device as described in claim 1, characterized in that: The positioning groove is larger than the semi-circular arc groove, and the arc-shaped swing positioning head is smaller than the semi-circular structure.

4. A bicycle folding device as described in claim 1, characterized in that: The primary pressing handle is provided with a recessed avoidance part, and the elastic component is located inside the recessed avoidance part.

5. A bicycle folding device as described in claim 1, characterized in that: The pipe fittings I and II are provided with folding compartments, and the primary and secondary pressing handles are both located inside the folding compartments.

6. A bicycle folding device as described in claim 1, characterized in that: The fixed hook is a screw, which is threaded and fixed inside the pipe fitting joint II. The nut on the screw cooperates with the locking hook to achieve hook fixation.

7. A bicycle folding device as described in claim 1, characterized in that: The arc-shaped swing positioning head adopts an umbrella-shaped screw, which is threaded onto the rotating shaft. The umbrella-shaped nut on the umbrella-shaped screw cooperates with the positioning groove to achieve locking and fixation.

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