Folding bicycle

Abstract

The application relates to a folding bicycle, comprising a frame, a main beam tube, a head tube, a middle tube assembly and a rear fork assembly; the main beam tube comprises a front section and a rear section which are connected to each other through a first folding structure, the head tube is connected to the front section, the middle tube assembly is connected to the rear section, and the rear fork assembly is connected to the middle tube assembly through a second folding structure; the frame further comprises a cable, one end of the cable is connected to the head tube and / or the front section, and the other end of the cable is connected to the middle tube assembly.

Description

Technical Field

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

[0002] Bicycles are not only an environmentally friendly means of transportation for getting around, but also a form of fitness equipment for cycling and outings, making them an important tool for travel and exercise in people's daily lives. Among them, folding bicycles are small in size and easy to store when folded, and are widely used in daily life.

[0003] Traditional folding bicycles suffer from low strength and a large, inconvenient size after folding, making them difficult to store. Utility Model Content

[0004] Therefore, it is necessary to provide a folding bicycle that can improve upon the aforementioned problems.

[0005] A folding bicycle, comprising:

[0006] The frame includes a main beam tube, a head tube, a bottom tube assembly, and a rear fork assembly; the main beam tube includes a front section and a rear section connected to each other by a first folding structure, the head tube is connected to the front section, the bottom tube assembly is connected to the rear section, and the rear fork assembly is connected to the bottom tube assembly by a second folding structure.

[0007] The frame also includes a cable, one end of which is connected to the head tube and / or the front section, and the other end of which is connected to the center tube assembly.

[0008] The aforementioned folding bicycle, through its first and second folding structures, achieves a three-fold frame. Compared to a non-foldable frame or a two-fold frame, the three-fold frame reduces the bicycle's size when folded, thus minimizing its footprint and facilitating storage. Furthermore, since the frame includes a cable, one end of which connects to the head tube and / or front section, and the other end to the bottom tube assembly, the cable is taut when the frame is unfolded and can bend when the frame is folded. Thus, when the frame is unfolded, the taut cable increases the frame's strength, thereby enhancing the folding bicycle's overall strength; when the frame is folded, the cable's bending does not hinder the folding process.

[0009] In one embodiment, the folding bicycle further includes:

[0010] A handlebar assembly and a first wiring harness, wherein the handlebar assembly is connected to the head tube, and the first wiring harness extends through the handlebar assembly to the rear fork assembly;

[0011] A limiting member provided on the cable is used to constrain the first wire harness to the cable.

[0012] In one embodiment, the limiting member is sleeved over the cable and the first wire harness, and allows the first wire harness to move relative to the cable along the extension direction of the limiting member;

[0013] and / or

[0014] The first wire harness includes multiple sub-wire harnesses, which are bonded and fixed together.

[0015] In one embodiment, the limiting member includes a first sleeve portion and a second sleeve portion connected to each other, the first sleeve portion being sleeved and fixedly fitted onto the outside of the cable, and the first wire harness being movably disposed within the second sleeve portion along the extending direction.

[0016] In one embodiment, the folding bicycle includes a plurality of the limiting members, which are sequentially and spaced apart on the cable to collectively constrain the first harness to the cable;

[0017] or

[0018] The folding bicycle includes one of the aforementioned limiting members.

[0019] In one embodiment, the head tube and / or the front section are provided with a connecting portion, and one end of the cable is connected to the connecting portion.

[0020] In one embodiment, the connection is welded to the head tube and / or the front section.

[0021] In one embodiment, the second folding structure includes a pivot, the axis of which is parallel to the left-right direction;

[0022] The rear fork of the rear fork assembly is connected to the center tube assembly via the pivot, and the rear fork assembly is rotatable about the axis of the pivot to fold or unfold with the center tube assembly.

[0023] In one embodiment, the second folding structure further includes a locking component connected to the center tube assembly to lock or unlock the upper fork of the rear fork assembly;

[0024] When the locking component unlocks the upper fork, the rear fork assembly can fold with the center tube assembly.

[0025] In one embodiment, when the frame is in a folded state, the head tube and the front section are folded to one side of the rear section in the left-right direction, and the rear fork assembly is folded to the underside of the rear section in the up-down direction. Attached Figure Description

[0026] Figure 1 A structural diagram of a folding bicycle provided in an embodiment of this application ( Figure 1 (The folding bicycle is in its unfolded state);

[0027] Figure 2 for Figure 1 The diagram shown depicts a folding bicycle in its intermediate folded state. Figure 2 The frame of the folding bicycle is in a folded state.

[0028] Figure 3 for Figure 1 The diagram shows a folding bicycle in a fully folded state.

[0029] Figure 4 for Figure 1 The diagram shows a structural view of the folding bicycle from another perspective.

[0030] Figure 5 for Figure 1 The diagram shown is a structural representation of a folding bicycle from another perspective.

[0031] Figure 6 A structural diagram of the first wiring harness, limiting member, and cable of a folding bicycle provided in another embodiment of this application;

[0032] Figure 7 A structural diagram of the first wiring harness, limiting member, and cable of a folding bicycle provided in another embodiment of this application;

[0033] Figure 8 A partial structural diagram of a folding bicycle provided in yet another embodiment of this application;

[0034] Figure 9 A partial structural diagram of a folding bicycle provided in another embodiment of this application;

[0035] Figure 10 for Figure 6 or Figure 7 Side view of the structure shown.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1000 Folding bicycle; 100 Frame; 10 Main beam tube; 11 Front section; 12 Rear section; 13 First folding structure; 20 Head tube; 30 Bottom tube assembly; 31 Bottom tube; 32 Bottom bracket; 40 Rear fork assembly; 41 Drop fork; 42 Top fork; 50 Second folding structure; 51 Pivot; 52 Locking assembly; 60 Cable; 70 Connector; 200 Handlebar assembly; 300 First wiring harness; 301 Sub-wiring harness; 400 Limiting element; 401 First socket; 42 Second socket; 500 Front wheel; 600 Rear wheel; 700 Front fork assembly; 800 Bottom bracket; 900 Crankset. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0044] See Figures 1-3 One embodiment of this application provides a folding bicycle 1000, which includes a frame 100 capable of being folded or unfolded, allowing the folding bicycle 1000 to switch between a folded state and an unfolded state. When the folding bicycle 1000 is in the unfolded state, it is convenient for the rider to ride; when the folding bicycle 1000 is in the folded state, it is convenient to store the folding bicycle 1000.

[0045] See Figure 1 , Figure 4 and Figure 5The frame 100 includes a main tube 10, a head tube 20, a bottom tube assembly 30, and a rear fork assembly 40. The main tube 10 includes a front section 11 and a rear section 12, which are connected by a first folding structure 13. The head tube 20 is connected to the front section 11, the bottom tube assembly 30 is connected to the rear section 12, and the rear fork assembly 40 is connected to the bottom tube assembly 30 via a second folding structure 50. Furthermore, the folding bicycle 1000 also includes a handlebar assembly 200, a front wheel 500, and a rear wheel 600. The frame 100 also includes a front fork assembly 700, which is connected to the head tube 20 and the handlebar assembly 200 is connected to the front fork assembly 700. The front wheel 500 is mounted on the front fork assembly 700, and the rear wheel 600 is mounted on the rear fork assembly 40.

[0046] The main beam tube 10 is the core load-bearing tube of the frame 100, directly determining the strength, stability, and riding comfort of the frame 100. The head tube 20 is the core structural component at the front end of the frame 100, connecting the main body of the frame 100 to the steering system. It is a key hub for controlling riding direction, transmitting road feedback, and ensuring handling stability. Generally, the bottom tube assembly 30 includes a bottom tube 31 and a bottom bracket tube 32. The bottom bracket tube 32 is connected to the bottom tube 31, the rear section 12 is connected to the bottom tube 31 and / or the bottom bracket tube 32, and the rear fork assembly 40 is connected to the bottom tube 31. Optionally, the rear fork assembly 40 can be directly connected to the bottom tube 31 or connected to the bottom tube 31 through an intermediate connector; this is not limited here. The bottom tube 31, also known as the seat tube of the frame 100, is the core load-bearing and connecting component of the frame 100, directly determining riding stability, comfort, and the functional adaptability of the frame 100. The center tube 31 supports the seatpost, which can be detached into the center tube 31 and secured by quick release or screws. The saddle is mounted on top of the seatpost. The bottom bracket 32 ​​is the core connection hub between the frame 100 and the drivetrain, directly determining the efficiency and smoothness of power transmission during riding, as well as the durability of the frame 100.

[0047] Since the front section 11 and the rear section 12 are connected by the first folding structure 13, and the rear fork assembly 40 is connected to the center tube assembly 30 by the second folding structure 50, the front section 11 and the rear section 12 can be folded or unfolded through the first folding structure 13, and the rear fork assembly 40 and the center tube assembly 30 can be folded or unfolded through the second folding structure 50. When the front section 11 and the rear section 12 are folded through the first folding structure 13, and the center tube assembly 30 and the rear fork assembly 40 are folded through the second folding structure 50, the frame 100 is in a folded state. In this way, the frame 100 can be folded three times through the first folding structure 13 and the second folding structure 50. The three-fold frame 100 reduces the volume of the folding bicycle 1000 compared to a non-foldable frame 100 or a two-fold frame 100, thereby reducing the floor space occupied and making it easier to store.

[0048] Optionally, please continue reading Figure 2 and Figure 3 When the frame 100 is in the folded state, the head tube 20 and the front section 11 are folded to one side (left or right) of the rear section 12 in the left-right direction, and the rear fork assembly 40 is folded to the lower side of the rear section 12 in the up-down direction to reduce the volume of the frame 100 after folding, thereby reducing the volume of the folding bicycle 1000 after folding.

[0049] It should be noted that, since the front fork assembly 700 is connected to the head tube 20, and the handlebar assembly 200 is connected to the front fork assembly 700, and the front wheel 500 is mounted on the front fork assembly 700, when the head tube 20 is folded to one side of the rear section 12 in the left-right direction, the handlebar assembly 200, the front fork assembly 700, and the front wheel 500 all fold to one side of the rear section 12 in the left-right direction along with the head tube 20 and the front section 11. Since the rear wheel 600 is connected to the rear fork assembly 40, when the rear fork assembly 40 is folded to the lower side of the rear section 12 in the vertical direction, the rear wheel 600 also folds to the lower side of the rear section 12 along with the rear fork assembly 40. Furthermore, the handlebar assembly 200 itself can be folded, or the handlebar assembly 200 can be folded relative to the front fork assembly 700, to further reduce the folded volume of the folding bicycle 1000, thereby further facilitating its storage.

[0050] It should be noted that the directions mentioned in the text, such as up, down, left, right, front, and back, are defined from the rider's perspective when riding the folding bicycle 1000. Figure 1 The X direction is the front-to-back direction, the Y direction is the left-to-right direction, and the Z direction is the up-to-down direction.

[0051] In some embodiments, see further reference. Figure 5 The second folding structure 50 includes a pivot 51, the axis of which is parallel to the left-right direction. The rear fork of the rear fork assembly 40 is connected to the center tube 31 via the pivot 51, and the rear fork assembly 40 can rotate around the axis of the pivot 51 to fold or unfold with the center tube assembly 30. In this way, the rear fork assembly 40 can be folded or unfolded with the center tube assembly 30 simply by rotating around its axis, improving the convenience of folding or unfolding.

[0052] Furthermore, the second folding structure 50 also includes a locking component 52, which is connected to the center tube assembly 30 to lock or unlock the upper fork 42 of the rear fork assembly 40. When the locking component 52 unlocks the upper fork 42, the rear fork assembly 40 can fold with the center tube assembly 30. Thus, when the frame 100 needs to be folded, the locking component 52 unlocks the rear fork assembly 40 to allow the rear fork assembly 40 to rotate and fold relative to the center tube assembly 30; when the frame 100 needs to be unfolded for use, the rear fork assembly 40 and the center tube assembly 30 unfold, and the locking component 52 locks the upper fork 42 to keep the frame 100 in the unfolded state for the rider's convenience.

[0053] Continue reading Figure 1 The frame 100 also includes a cable 60, one end of which is connected to the head tube 20 and / or the front section 11, and the other end is connected to the bottom tube assembly 30. When the frame 100 is in the unfolded state, the cable 60 is tensioned; when the frame 100 is in the folded state, the cable 60 can deform and bend. Thus, when the frame 100 is in the unfolded state, the tension of the cable 60 increases the strength of the frame 100, thereby increasing the strength of the folding bicycle 1000; when the frame 100 is in the folded state, the cable 60 can deform and bend without hindering the folding of the frame 100, i.e., it does not hinder the folding of the folding bicycle 1000.

[0054] See Figure 6 and Figure 7 The folding bicycle 1000 also includes a first wiring harness 300, which extends from the handlebar assembly 200 to the rear fork assembly 40. The first wiring harness 300 includes a rear brake cable and a shift cable, etc. It is understood that in some other embodiments, the first wiring harness 300 may also include other wiring harnesses on the folding bicycle 1000; any wiring harness that can extend from the handlebar assembly 200 to the rear fork assembly 40 can be classified as the first wiring harness 300. The folding bicycle 1000 also includes a limiting member 400 disposed on the cable 60, which is used to constrain the first wiring harness 300 to the cable 60. Specifically, the limiting member 400 can constrain the middle portion of the first wiring harness 300 together with the cable 60.

[0055] The above configuration, because the limiting member 400 can constrain the first wire harness 300 to the cable 60, makes the wiring of the folding bicycle 1000 neat and reduces the possibility of the first wire harness 300 getting caught on other parts when the folding bicycle 1000 is folded, thus facilitating the folding of the folding bicycle 1000.

[0056] It should be noted that, in addition to the first wiring harness 300, the folding bicycle 1000 may also include a second wiring harness. Optionally, the second wiring harness extends from the handlebar assembly 200 to the front fork assembly 700, and the second wiring harness includes the front brake cable.

[0057] In some embodiments, see further reference. Figure 1 A connecting portion 70 protrudes from the head tube 20 and / or the front section 11, and one end of the cable 60 is connected to the connecting portion 70. In this way, the cable 60 is connected to the head tube 20 and / or the front section 11 through the connecting portion 70, so as to realize the connection between the cable 60 and the head tube 20 and / or the front section 11.

[0058] Furthermore, the connecting portion 70 protrudes from the right side of the head tube 20 and / or the front section 11. Specifically, the folding bicycle 1000 also includes a bottom bracket 800 and a chainring 900. The bottom bracket 800 is installed inside the bottom bracket 32, and the chainring 900 is connected to the bottom bracket 800. In the left-right direction, the connecting portion 70 protrudes from the side of the head tube 20 and / or the front section 11 near the chainring 900, thus positioning the cable 60 between the frame body and the pressure plate 900 in the left-right direction, improving the structural compactness of the folding bicycle 1000.

[0059] For some specific implementation methods, see [link to relevant documentation]. Figure 8 The connecting portion 70 protrudes from the front section 11. See also other specific embodiments. Figure 9 The connecting part 70 protrudes from the head tube 20, so that one end of the cable 60 is connected to the head tube 20 through the connecting part 70. This arrangement, compared to the way the connecting part 70 protrudes from the front section 11 of the main beam tube 10 and connects one end of the cable 60 to the front section 11 through the connecting part 70, can extend the length of the cable 60, thereby enhancing the strengthening effect of the cable 60 on the frame 100.

[0060] It is conceivable that in some other embodiments, the connecting part 70 may also protrude from the connection point where the head tube 20 and the front section 11 connect to each other. In this case, the connecting part 70 is connected to both the head tube 20 and the front section 11, and the cable 60 is connected to the head tube 20 and the front section 11 through the connecting part 70. In still some embodiments, the connecting part 70 may be omitted, in which case the cable 60 is directly connected to the head tube 20 and / or the front section 11.

[0061] Optionally, the connecting part 70 is welded and fixed to the head tube 20 and / or the front section 11 to ensure the fixing effect between the connecting part 70 and the head tube 20 and / or the front section 11. It is conceivable that in some other embodiments, the connecting part 70 may also be connected and fixed to the head tube 20 and / or the front section 11 in other ways, such as by screw connection and fixing, which is not limited here.

[0062] In this application, the structure of the connecting portion 70 is not limited. For some specific embodiments, please refer to [the relevant documentation]. Figure 8 and Figure 9 The connecting part 70 is U-shaped, and the outer side of the middle part of the U-shape is welded to the head tube 20. One end of the cable 60 is accommodated in the gap formed by the two ends of the U-shape. Fixing screws are inserted through the two ends of the U-shape and the cable 60 to fix the two together.

[0063] Furthermore, the other end of the cable 60 can be directly connected to the central tube 31 and / or the five-way connector 32, or it can be connected to the central tube 31 and / or the five-way connector 32 through an intermediate connector. In some embodiments, the cable 60 is directly welded to the central tube 31. In other embodiments, the cable 60 is directly welded to the five-way connector 32.

[0064] In some embodiments, see further reference. Figure 6 and Figure 7 The limiting member 400 is sleeved outside the cable 60 and the first wire harness 300, allowing the first wire harness 300 to move relative to the cable 60 along the extending direction of the limiting member 400. This arrangement serves two purposes: firstly, the limiting member 400, sleeved outside the cable 60 and the first wire harness 300, restricts the movement of the first wire harness 300 to a certain extent, reducing interference between the first wire harness 300 and other components; secondly, when the folding bicycle 1000 is folded or unfolded, there may be pulling on the first wire harness 300. Since the limiting member 400 allows the first wire harness 300 to move relative to the cable 60 along the extending direction of the limiting member 400, the first wire harness 300 has sufficient space to move, preventing it from jamming and thus preventing the folding bicycle 1000 from folding or unfolding.

[0065] Further reading Figure 10 The limiting member 400 includes a first sleeve portion 401 and a second sleeve portion 402 connected to each other. The first sleeve portion 401 is fixedly sleeved on the outside of the cable 60, and the first wire harness 300 is movably disposed within the second sleeve portion 402 along the extending direction of the limiting member 400. In this way, the limiting member 400 is always fixed to the cable 60, and only the first wire harness 300 moves relative to the limiting member 400 during folding or unfolding. In the case where both the cable 60 and the first wire harness 300 move relative to the limiting member 400, wear on the limiting member 400 and the first wire harness 300 can be reduced.

[0066] In some embodiments, see further reference. Figure 7 The folding bicycle 1000 includes multiple limiting members 400, which are arranged sequentially and at intervals on the cable 60 to jointly constrain the first wire harness 300 to the cable 60, thereby ensuring the constraint effect.

[0067] In other embodiments, see further description. Figure 6 The folding bicycle 1000 includes only one limiting component 400. When the folding bicycle 1000 includes only one limiting component 400, the length of the limiting component 400 can be appropriately increased to ensure the restraint and limiting effect.

[0068] Optionally, please continue reading Figure 10 The first wire harness 300 includes multiple sub-wire harnesses 301, which are bonded and fixed together. Bonding and fixing the multiple sub-wire harnesses 301 together can further prevent the wire harness from becoming tangled, thereby improving the neatness of the wire harness.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A folding bicycle, characterized in that, include: The frame (100) includes a main beam tube (10), a head tube (20), a bottom tube assembly (30), and a rear fork assembly (40); the main beam tube (10) includes a front section (11) and a rear section (12) connected to each other by a first folding structure (13), the head tube (20) is connected to the front section (11), the bottom tube assembly (30) is connected to the rear section (12), and the rear fork assembly (40) is connected to the bottom tube assembly (30) by a second folding structure (50); The frame (100) also includes a cable (60), one end of which is connected to the head tube (20) and / or the front section (11), and the other end is connected to the center tube assembly (30).

2. The folding bicycle according to claim 1, characterized in that, The folding bicycle also includes: The handlebar assembly (200) and the first wiring harness (300) are connected to the head tube (20) and the first wiring harness (300) extends through the handlebar assembly (200) to the rear fork assembly (40). A limiting member (400) provided on the cable (60) is used to constrain the first wire harness (300) to the cable (60).

3. The folding bicycle according to claim 2, characterized in that, The limiting member (400) is sleeved on the cable (60) and the first wire harness (300), and allows the first wire harness (300) to move relative to the cable (60) along the extension direction of the limiting member (400); and / or The first wire harness (300) includes multiple sub-wire harnesses (301), which are bonded and fixed together.

4. The folding bicycle according to claim 3, characterized in that, The limiting member (400) includes a first socket (401) and a second socket (402) connected to each other. The first socket (401) is sleeved and fixedly fitted outside the cable (60), and the first wire harness (300) is movably disposed inside the second socket (402) along the extension direction.

5. The folding bicycle according to claim 2, characterized in that, The folding bicycle includes a plurality of limiting members (400), which are sequentially spaced on the cable (60) to collectively constrain the first wire harness (300) to the cable (60); or The folding bicycle includes one of the aforementioned limiting members (400).

6. The folding bicycle according to claim 1, characterized in that, The head tube (20) and / or the front section (11) are provided with a connecting part (70), and one end of the cable (60) is connected to the connecting part (70); The connecting part (70) protrudes from the right side of the head tube (20) and / or the front section (11).

7. The folding bicycle according to claim 6, characterized in that, The connecting part (70) is welded to the head tube (20) and / or the front section (11).

8. The folding bicycle according to claim 1, characterized in that, The second folding structure (50) includes a pivot (51), the axis of which is parallel to the left-right direction; The rear fork of the rear fork assembly (40) is connected to the center tube assembly (30) via the pivot (51), and the rear fork assembly (40) is rotatable about the axis of the pivot (51) to fold or unfold with the center tube assembly (30).

9. The folding bicycle according to claim 8, characterized in that, The second folding structure (50) further includes a locking component (52) connected to the center tube assembly (30) to lock or unlock the upper fork (42) of the rear fork assembly (40); When the locking component (52) unlocks the upper fork (42), the rear fork component (40) can fold with the center tube component (30).

10. The folding bicycle according to claim 1, characterized in that, When the frame (100) is in a folded state, the head tube (20) and the front section (11) are folded to one side of the rear section (12) in the left-right direction, and the rear fork assembly (40) is folded to the lower side of the rear section (12) in the up-down direction.

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