Carbon fiber folding bicycle

Abstract

The invention relates to the field of bicycles, and provides a carbon fiber folding bicycle which comprises a bicycle head front fork, a saddle assembly, a bicycle frame structure, wheels and a chain wheel pedal structure. The frame structure is divided into two sections, namely a first frame and a second frame; the bicycle head front fork is installed at one end of the first bicycle frame structure, and the saddle assembly is installed at the end, away from the bicycle head front fork, of the first bicycle frame structure. The wheels are divided into a front wheel and a rear wheel, the front wheel is installed at the bottom of the bicycle head front fork, the rear wheel is installed on the second bicycle frame, and the chain wheel pedal structure is installed below the bicycle seat assembly, connected with the wheels and used for providing driving. The first frame is hinged to the second frame; the saddle assembly includes a support tube, a telescopic structure, a seat, and a first fastening structure. The locking device has the effects of facilitating locking and providing convenience at the same time.

Description

Technical Field

[0001] The present application relates to the field of bicycles, and in particular to a carbon fiber folding bicycle. Background Art

[0002] As a common means of transportation, bicycles are widely popular because of their environmental protection and convenience. In urban environments with limited space, foldable bicycles have become a hot product in the market because of their ability to effectively save storage space.

[0003] The foldable bicycles currently available on the market mainly use a multi-point fixing method to ensure stability and safety during riding. Although these multi-point fixing structures have solved the problems of stability and safety of riding foldable bicycles to a certain extent, when folding is required, the complex multi-point fixing structures need to be opened in sequence before folding can be performed. Conversely, when unfolding, the unfolded bicycle also needs to be locked in sequence. Therefore, there are still many inconveniences in actual use. Summary of the invention

[0004] In order to improve the above-mentioned problems, the present application provides a carbon fiber folding bicycle.

[0005] The present application provides a carbon fiber folding bicycle adopting the following technical solution: A carbon fiber folding bicycle, comprising a front fork, a seat assembly, a frame structure, wheels and a sprocket pedal structure; the frame structure is divided into two sections, namely a first frame and a second frame; the front fork is mounted on one end of the first frame structure, and the seat assembly is mounted on an end of the first frame away from the front fork; the wheels are divided into a front wheel and a rear wheel, the front wheel is mounted on the bottom of the front fork, the rear wheel is mounted on the second frame, the sprocket pedal structure is mounted below the seat assembly, and is connected to the wheels and provides drive; the first frame The frame is hinged to the second frame; a locking structure locked by bolts is provided between the front fork and the first frame structure, and the locking structure is connected to the hinged frame; the seat assembly includes a support tube, a telescopic structure, a seat and a first fastening structure; the telescopic structure is plugged into the support tube, the seat is installed on the top of the telescopic structure, and the seat height is adjusted by the telescopic structure; the first fastening structure is installed on the support tube, and the second frame is provided with a second fastening structure at one end close to the first frame, and the first fastening structure is clamped with the second fastening structure.

[0006] By adopting the above technical solution, when folding is required, the bolt locking structure is loosened so that the front fork can rotate freely through the hinge frame, thereby folding the front fork to a position that cooperates with the front end of the first frame, so that the handlebar can be close to the front wheel, greatly reducing the occupied space of the bicycle, pressing the first fastening structure to separate the first fastening structure from the second fastening structure, so that the second frame loses the fixing effect of the first fastening structure, and can be rotated along the hinge point with the first frame to be folded, and the first fastening structure is set to be clamped with the second fastening structure on the second frame, and the second frame is connected to the seat assembly to ensure stability.

[0007] Optionally, the first fastening structure includes an arc-shaped buckle frame, and the arc-shaped buckle frame extends into two connecting sections, both of the connecting sections are provided with threaded holes, and the two connecting sections are in a flat semi-box shape, and the box openings are opened relatively to each other; a fastening bolt is provided in the threaded hole, and the fastening bolt is located between the two connecting sections, and is sleeved with a first elastic part and a fastening frame; one end of the fastening frame is connected to the first elastic part, and the first elastic part provides elastic force for resetting the fastening frame, and the fastening frame is provided with a buckling protrusion in the form of an arc-shaped hook.

[0008] By adopting the above technical solution, the fastening bolt locks the arc-shaped buckle frame to the support tube. When the second buckling structure moves toward the connecting section, the arc-shaped hook-shaped buckling protrusion is pushed, so that the buckling frame is pushed open, and the second buckling structure is inserted into the two half-box-shaped connecting sections. The first elastic part applies elastic force to the buckling frame, so that the buckling protrusion is stuck in the second buckling structure, thereby achieving a locking effect. Through the elastic force of the first elastic part, the buckling protrusion will not detach from the second buckle, thereby ensuring that the second buckling structure completes a stable connection.

[0009] Optionally, the second fastening structure includes a fixing frame and an insertion frame; the fixing frame is detachably connected to the second frame; the insertion frame is installed on the fixing frame, and is semi-spherical at one end away from the fixing frame, and contacts with the snapping protrusion when inserted into the connecting section, and presses down the snapping protrusion, and as the insertion frame continues to extend toward the connecting section, the snapping protrusion is affected by the elastic force of the first elastic part and is snapped with the insertion frame.

[0010] By adopting the above technical solution, when the second frame is folded along the hinge point with the first frame, the insertion frame continuously extends toward the connecting section, and when the buckling protrusion is separated from the semi-spherical arc wall, the buckling protrusion is affected by the elastic force of the first elastic part and is clamped into the insertion frame, thereby making the connection stable. When it is necessary to separate the insertion frame to fold the second frame, the buckling frame is bent to separate the buckling protrusion from the insertion, and the second frame can be rotated and folded along the hinge point.

[0011] Optionally, the second fastening structure further includes a shock absorber; one end of the shock absorber is connected to the fixing frame, and the other end is connected to the insertion frame.

[0012] By adopting the above technical solution, the shock absorber can reduce the discomfort caused by the vibration of uneven ground during riding, improve riding comfort, and also reduce the impact of vibration on the connection between the clamping frame and the plug-in frame, avoiding the loosening of the connection between the clamping frame and the plug-in frame due to vibration.

[0013] Optionally, the second fastening structure is also provided with a double-buckle handle; the double-buckle handle is pivotally connected to the outer wall of the shock absorber and is connected to the insertion bracket; the insertion bracket is pivotally connected to the shock absorber, and a plurality of double-buckle grooves are provided on the insertion bracket; a double-buckle clamp is provided on the inner wall of the connecting section, and when the insertion bracket is inserted into the connecting section, the double-buckle handle is rotated and the insertion bracket is pushed so that the double-buckle clamp is inserted into the double-buckle groove.

[0014] By adopting the above technical scheme, when the insertion rack moves toward the connecting section along the flipping of the second frame, the double-buckle handle is rotated synchronously, the double-buckle handle drives the insertion rack to rotate, and at the same time the double-buckle groove is aligned with the double-buckle clamp, and then the double-buckle clamp is inserted into the double-buckle groove, and then the double-buckle handle is rotated to stagger the insertion rack and the double-buckle clamp, thereby achieving the effect of clamping, and the double-buckle clamp and the locking protrusion are synchronously clamped to achieve a double locking effect, further ensuring the stability of the connection, and at the same time, only the double-buckle handle needs to be rotated to rotate the insertion rack to disengage or insert the connecting section, thereby not affecting the convenience of connection.

[0015] Optionally, the re-buckle groove includes a limit groove and a semi-arc groove; the limit groove is connected to the semi-arc groove, and the notches of the limit grooves are all facing the re-buckle card. When the insertion rack is inserted, the limit groove is plugged into the re-buckle card, and then when it moves to the semi-arc groove, the insertion rack rotates to make the re-buckle card snap into the semi-arc groove.

[0016] By adopting the above technical solution, when the insertion rack is inserted into the connecting section, the limit groove is plugged into the double-buckle card, and the double-buckle card then moves along the limit groove until it moves to the semi-arc groove, and then the double-buckle handle is rotated. The double-buckle handle drives the insertion rack to rotate, so that the double-buckle card is inserted into the semi-arc groove. The double-buckle card clamps the insertion rack, making it impossible for the insertion rack to detach from the connecting section, thereby achieving a double locking effect.

[0017] Optionally, the limiting grooves and the semi-arc grooves are provided in several groups, and each limiting groove is correspondingly connected to a semi-arc groove; the number of the re-buckle clamps is the same as or less than the number of the limiting grooves.

[0018] By adopting the above technical scheme, when the number of compound buckle clips is consistent with the limit slots, each compound buckle clip can be inserted into the limit slot and engaged with the corresponding semi-arc slot, thereby realizing a multi-point clamping effect and improving the stability of the clamping. When the number of compound buckle clips is less than the limit slots, the limit slots have greater rotation conditions, and the clamping effect can be achieved after any limit slot is rotated to the position of the compound buckle clip.

[0019] Optionally, the inserting rack is further connected to a second elastic portion; the second elastic portion provides elastic force for the inserting rack to twist toward the semi-arc groove.

[0020] By adopting the above technical solution, the second elastic part applies an elastic force to the insertion rack in the direction away from the limit groove, so that the groove wall of the upper semi-arc groove of the insertion rack can always resist the re-buckle card, thereby preventing the re-buckle card from returning to the limit groove due to bumps or vibrations during riding, and avoiding the risk of the re-buckle card detaching along the limit groove.

[0021] Optionally, a locking groove is further provided on the side of the insertion rack away from the connecting section; the locking groove is staggered with the buckle protrusion, and when the buckle sleeve rotates the insertion rack to make the buckle clamp dock with the limit groove, the locking groove and the buckle protrusion dock synchronously.

[0022] By adopting the above technical solution, the elastic force of the first elastic part is used to make the fastening frame and the fastening protrusion clamped on the plug-in frame. Then, when the locking groove rotates to the fastening protrusion, the fastening protrusion is affected by the elastic force of the first elastic part and then clamped into the locking groove, so that the plug-in frame cannot rotate and the composite fastening member cannot move along the semi-arc groove and the limit groove, so that the plug-in frame is completely clamped, and the composite locking effect is achieved by the fastening protrusion and the locking groove, so that the position of the plug-in frame is fixed, and the stability of the connection is further increased.

[0023] Optionally, the groove wall of the locking groove is an arc-shaped inclined surface.

[0024] By adopting the above technical solution, the buckling protrusion can be inserted into the locking groove along the arc-shaped inclined surface, so as to facilitate the buckling protrusion to be inserted and avoid the situation of inaccurate insertion position.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When folding is required, the bolt locking structure is loosened so that the front fork can rotate freely through the hinge frame, thereby folding the front fork to a position matched with the front end of the first frame, so that the handlebar can be close to the front wheel, greatly reducing the occupied space of the bicycle, pressing the first fastening structure to separate the first fastening structure from the second fastening structure, so that the second frame loses the fixing effect of the first fastening structure, and can rotate along the hinge point with the first frame to be folded, and the second frame is connected to the seat assembly by setting the first fastening structure to be clamped with the second fastening structure on the second frame to ensure stability; 2. Tighten the bolts to lock the arc-shaped buckle frame on the support tube. When the second buckle structure moves toward the connecting section, the arc-shaped hook-shaped buckle protrusion is pushed, so that the buckle frame is pushed open, and the second buckle structure is inserted into the two half-box-shaped connecting sections. The first elastic part applies elastic force to the buckle frame, so that the buckle protrusion is stuck in the second buckle structure, thereby achieving a locking effect. The buckle protrusion will not be detached from the second buckle through the elastic force of the first elastic part, thereby ensuring that the second buckle structure completes a stable connection; 3. When the second frame is folded along the hinge point with the first frame, the insertion frame continuously extends toward the connection section. When the buckle protrusion is separated from the semi-spherical arc wall, the buckle protrusion is affected by the elastic force of the first elastic part and is clamped into the insertion frame, so that the connection is stable. When the insertion frame needs to be separated to fold the second frame, the buckle frame is moved to separate the buckle protrusion from the insertion, and the second frame can be rotated and folded along the hinge point; 4. The shock absorber can reduce the discomfort caused by the uneven vibration of the ground during riding, improve the riding comfort, and also reduce the impact of vibration on the connection between the fastening frame and the plug-in frame, avoiding the loose connection between the fastening frame and the plug-in frame due to vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the three-dimensional structure of a bicycle in one embodiment of the present application; Figure 2 is a schematic diagram of the three-dimensional structure of the front part of a vehicle in some embodiments of the present application; Figure 3 is a schematic diagram of a first three-dimensional structure of a vehicle seat assembly in some embodiments of the present application; Figure 4 is a schematic diagram of an exploded structure of a vehicle seat assembly in some embodiments of the present application; Figure 5 is a schematic diagram of the three-dimensional structure of the first fastening structure in some embodiments of the present application; Figure 6 is a schematic diagram of the three-dimensional structure of the second fastening structure in some embodiments of the present application; 1. The markings in the accompanying drawings are: 1. front fork of the front vehicle, 2. seat assembly, 21. support tube, 22. telescopic structure, 23. seat, 24. first fastening structure, 241. arc-shaped buckle frame, 2411. connecting section, 2412. compound buckle card, 242. fastening bolt, 243. first elastic part, 244. fastening frame, 2441. buckling protrusion, 3. frame structure, 31. first frame, 32. second frame, 33. second fastening structure, 331. fixing frame, 332. inserting frame, 3321. locking groove, 333. shock absorber, 334. compound buckle handle, 335. compound buckle groove, 3351. limiting groove, 3352. semi-arc groove, 336. second elastic part, 4. wheel, 41. front wheel, 42. rear wheel, 5. sprocket pedal structure, 6. locking structure, 61. articulated frame. DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the information disclosed in the present application. The present application can also be implemented or applied through other different specific implementations, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0029] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0030] In addition, the terms "first" and "second" are only used to indicate the target, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0032] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0033] The embodiment of the present application discloses a carbon fiber folding bicycle.

[0034] A carbon fiber folding bicycle, reference Figure 1 As shown, it includes a front fork 1, a seat assembly 2, a frame structure 3, a wheel 4 and a sprocket pedal structure 5; the frame structure 3 is divided into two sections, namely a first frame 31 and a second frame 32, the front fork 1 is installed at one end of the first frame structure 3, the seat assembly 2 is installed at the end of the first frame 31 away from the front fork 1, and a handle is provided on the top of the front fork 1 for controlling the driving direction, and brakes and other structures can be set at the handle.

[0035] The wheel 4 is divided into a front wheel 41 and a rear wheel 42. The front wheel 41 is installed at the bottom of the front fork 1, and the rear wheel 42 is installed on the second frame 32. The sprocket pedal structure 5 is installed under the seat assembly 2 and is connected to the wheel 4 and provides drive. The sprocket pedal structure 5 includes two pedals and a plurality of sprockets. The user applies force by stepping on the pedals to drive the wheel 4 to rotate through the sprocket to achieve the purpose of moving.

[0036] The first frame 31 is hinged to the second frame 32 , so that the first frame 31 and the second frame 32 can be folded through the hinge point, thereby reducing the overall volume of the bicycle for easy carrying and storage.

[0037] refer to Figure 2 As shown, a detachable bolt locking structure 6 is provided between the front fork 1 and the first frame structure 3, and the locking structure 6 is connected to an articulated frame 61, which is a rotation connection point of the front fork of the wheel 4. The articulated frame 61 is specifically located on one side of the front fork of the wheel 4, allowing the front fork of the wheel 4 to be folded through the locking structure 6 and rotate around the articulated frame 61.

[0038] When it is necessary to fold the bicycle, the bolt locking structure 6 is loosened so that the front fork can rotate freely through the articulated frame 61, thereby folding the front fork to a position matching the front end of the first frame 31, so that the handlebars can be close to the front wheel 41, greatly reducing the occupied space of the bicycle. For example, the articulated frame 61 of the rotating connection point can be a pin or a rotating bearing, and the bolt locking structure 6 can be replaced by a quick release lock, which can also achieve the function of quick unlocking and locking.

[0039] The outer wall of the locking structure 6 may be provided with a closing cover, and the inner side of the closing cover is a triangular inner cavity to match the style of the locking structure 6 after folding.

[0040] refer to Figure 1 As shown, the seat assembly 2 includes a support tube 21, a telescopic structure 22, a seat 23 and a first fastening structure 24; the telescopic structure 22 is plugged into the support tube 21, the seat 23 is installed on the top of the telescopic structure 22, and the height of the seat 23 is adjusted by the telescopic structure 22. The support tube 21 in the seat assembly 2 is made of high-strength carbon fiber material, and has the characteristics of light weight and high strength. The telescopic structure 22 adopts a telescopic rod and an opening and closing buckle frame, and the opening and closing buckle frame is provided with an opening and closing handle. The opening and closing buckle frame is sleeved at the pipe mouth of the support tube 21, and the telescopic rod is inserted into the support tube 21 and can be pulled up and down along the support tube 21. The opening and closing buckle frame is pressed by the opening and closing handle, so that the pipe mouth of the support tube 21 is closed, thereby fixing the support tube 21 and the telescopic rod.

[0041] The seat 23 is ergonomically designed and covered with a soft and comfortable foam layer or silicone layer to provide a good riding experience.

[0042] The first fastening structure 24 is installed on the support tube 21, and the second fastening structure 33 is provided at one end of the second frame 32 close to the first frame 31. The first fastening structure 24 is clamped with the second fastening structure 33. When the second frame 32 needs to be merged from a folded state to an unfolded state, the second frame 32 is unfolded along the hinge point with the first frame 31, and the second fastening structure 33 is inserted into the first fastening structure 24 as it rotates. At the same time, the first fastening structure 24 clamps the second fastening structure 33, thereby completing the unfolding operation.

[0043] When folding is required, the first fastening structure 24 is pressed to separate the first fastening structure 24 from the second fastening structure 33, so that the second frame 32 loses the fixing effect of the first fastening structure 24 and can be rotated along the hinge point with the first frame 31 to be folded.

[0044] The front fork 1 is folded or unfolded at the first frame 31 by using the bolt locking structure 6. The seat assembly 2 is used as a position to carry the user and will bear greater pressure. Therefore, the folding and unfolding of this point is particularly important. The first fastening structure 24 is provided to be clamped with the second fastening structure 33 on the second frame 32 to connect the second frame 32 with the seat assembly 2 to ensure stability.

[0045] For further reference, Figure 3 As shown, the first fastening structure 24 includes an arc-shaped buckle frame 241, and the arc-shaped buckle frame 241 extends two connecting sections 2411, and the two connecting sections 2411 are both provided with threaded holes, and the two connecting sections 2411 are in a flat semi-box shape, and the box openings are opened opposite to each other. One side of the arc-shaped buckle frame 241 is an opening, which can be opened by breaking the two connecting sections 2411 apart, and the arc-shaped buckle frame 241 can be inserted into the support tube 21. A fastening bolt 242 is provided in the threaded hole, and the fastening bolt 242 is located between the two connecting sections 2411. The arc-shaped buckle frame 241 is fixed to the support tube 21 by tightening the threaded hole and the fastening bolt 242. The arc-shaped buckle frame 241 is used to provide a connection fulcrum for folding or unfolding.

[0046] refer to Figure 4 As shown, the middle sleeve of the fastening bolt 242 is provided with a first elastic portion 243 and a fastening frame 244, which is specifically located between the two connecting sections 2411. One end of the fastening frame 244 is provided with a pivot opening, and is sleeved on the fastening bolt 242 through the pivot opening. The end of the fastening frame 244 with the pivot opening is connected to the first elastic portion 243, and the first elastic portion 243 provides elastic force for the fastening frame 244 to reset. The first elastic portion 243 can adopt a torsion spring. The fastening frame 244 is provided with a snapping protrusion 2441 in an arc-shaped hook shape. The snapping protrusion 2441 is offset by the elastic force of the first elastic portion 243, wherein a resisting protrusion against the snapping protrusion 2441 can be provided at the connecting section 2411 to avoid the snapping protrusion 2441 being offset due to the excessive elastic force, so as to ensure that the snapping protrusion 2441 is accurately set.

[0047] Specifically, the fastening bolt 242 locks the arc-shaped buckle frame 241 on the support tube 21. When the second buckling structure 33 moves toward the connecting section 2411, it pushes the arc-shaped hook-shaped buckling protrusion 2441, so that the buckling frame 244 is pushed open, and the second buckling structure 33 is inserted into the two half-box-shaped connecting sections 2411. The first elastic part 243 applies elastic force to the buckling frame 244, so that the buckling protrusion 2441 is stuck in the second buckling structure 33, thereby achieving a locking effect. Through the elastic force of the first elastic part 243, the buckling protrusion 2441 will not detach from the second buckle, thereby ensuring that the second buckling structure 33 completes a stable connection.

[0048] Further, refer to Figure 3or Figure 4 As shown, the second fastening structure 33 includes a fixing frame 331 and an inserting frame 332; the fixing frame 331 is detachably connected to the second frame 32, and the detachable connection between the fixing frame 331 and the second frame 32 can be a screw connection, such as a thread groove is provided on the second frame 32, and an external thread is provided on the fixing frame 331, and the external thread is screwed with the thread groove to achieve a detachable connection effect, which is convenient for maintenance and replacement.

[0049] The insertion bracket 332 is installed on the fixing bracket 331, and the end away from the fixing bracket 331 is semi-spherical. When inserted into the connecting section 2411, it contacts the buckling protrusion 2441 and presses down the buckling protrusion 2441. As the insertion bracket 332 continues to extend toward the connecting section 2411, when the buckling protrusion 2441 breaks away from the semi-spherical arc wall, the buckling protrusion 2441 is affected by the elastic force of the first elastic portion 243 and is clamped into the insertion bracket 332, thereby making the connection stable. When it is necessary to separate the insertion bracket 332 to unfold the second frame 32 for riding, the fastening frame 244 is bent to separate the buckling protrusion 2441 from the insertion, so that the second frame 32 can be rotated and folded along the hinge point, and the clamping effect of the insertion bracket 332 and the fastening frame 244 is utilized to facilitate the clamping or separation of the second frame 32, providing a more convenient connection method for folding or unfolding the bicycle.

[0050] Further, refer to Figure 3 or Figure 4 As shown, the second fastening structure 33 also includes a shock absorber 333; one end of the shock absorber 333 is connected to the fixed frame 331, and the other end is connected to the plug-in frame 332. The shock absorber 333 can adopt a structure of a shock-absorbing tube and an internally arranged shock-absorbing spring. The shock absorber 333 can reduce the discomfort caused by the vibration of uneven ground during riding, thereby improving riding comfort, while also reducing the impact of vibration on the connection between the fastening frame 244 and the plug-in frame 332, thereby avoiding the situation where the connection between the fastening frame 244 and the plug-in frame 332 becomes loose due to vibration.

[0051] Specifically, the fixing frame 331 can be installed on the outer wall of the shock absorber 333, and the plug-in frame 332 can be inserted into the shock absorber 333 and connected to the shock-absorbing spring damping in the shock absorber 333 to provide a shock-absorbing effect, or the plug-in frame can be connected to the outer wall of the shock absorber 333, and the fixing frame 331 can be inserted into the shock absorber 333 and connected to the shock-absorbing spring damping. The specific installation method is determined according to usage requirements.

[0052] In some embodiments, reference Figure 5As shown, the second fastening structure 33 is also provided with a compound buckle handle 334; the compound buckle handle 334 is sleeved on the outer wall of the shock absorber 333 and is pivotally connected, and is connected to the insertion frame 332. If a plurality of annular grooves are provided on the inner wall of the compound buckle handle 334, and a plurality of annular protrusions are provided on the outer wall of the shock absorber 333, and the annular protrusions are embedded in the annular grooves one by one, the compound buckle handle 334 can be pivotally connected to the outer wall of the shock absorber 333. When the compound buckle handle 334 rotates along the shock absorber 333, the annular protrusions rotate along the annular grooves. At the same time, the compound buckle handle 334 cannot be detached from the shock absorber 333 due to the restriction of the annular protrusions and the annular grooves.

[0053] The rack 332 is pivotally connected to the shock absorber 333, and a plurality of buckle grooves 335 are provided on the rack 332. A pivot groove or a pivot bearing can be provided on the surface of the shock absorber 333. The rack 332 can be connected to the pivot groove or the pivot bearing, that is, it can be rotated along the shock absorber 333. At the same time, the rack 332 is connected to the buckle handle 334. When the buckle handle 334 rotates along the shock absorber 333, the rack 332 can be driven to rotate synchronously.

[0054] The inner wall of the connecting section 2411 is provided with a re-locking clamp 2412. When the inserting frame 332 is inserted into the connecting section 2411, the re-locking clamp 2412 can be locked into the re-locking groove 335 by rotating the re-locking handle 334, so that the inserting frame 332 cannot be detached from the connecting section 2411, so as to further improve the stability of the connection.

[0055] Specifically, when the insertion rack 332 moves toward the connecting section 2411 along the flipping of the second frame 32, the buckle handle 334 is rotated synchronously, and the buckle handle 334 drives the insertion rack 332 to rotate, and at the same time, the buckle groove 335 is aligned with the buckle card 2412, and then the buckle card 2412 is inserted into the buckle groove 335, and then the buckle handle 334 is rotated to stagger the insertion rack 332 and the buckle card 2412, so as to achieve the effect of snapping, and the buckle card 2412 is synchronously clamped with the snapping protrusion 2441 to achieve a double locking effect, further ensuring the stability of the connection, and at the same time, only the buckle handle 334 needs to be rotated to rotate the insertion rack 332 to disengage or insert the connecting section 2411, thereby not affecting the convenience of connection.

[0056] For further reference, Figure 5 and Figure 6As shown, the re-buckle groove 335 includes a limit groove 3351 and a semi-arc groove 3352. The limit groove 3351 is connected with the semi-arc groove 3352. The notches of the limit groove 3351 are all facing the re-buckle card 2412. The limit groove 3351 and the semi-arc groove 3352 are connected to each other and can be L-shaped. When the rack 332 is inserted into the connecting section 2411, the limit groove 3351 is plugged into the re-buckle card 2412, and the re-buckle card 2412 then moves along the limit groove 3351 until it moves to the semi-arc groove 3352, and then the re-buckle handle 334 is rotated. The re-buckle handle 334 drives the rack 332 to rotate, so that the re-buckle card 2412 is stuck in the semi-arc groove 3352, and the re-buckle card 2412 clamps the rack 332, so that the rack 332 cannot be detached from the connecting section 2411, thereby achieving a double locking effect.

[0057] Among them, there are several groups of limit grooves 3351 and semi-arc grooves 3352, and each limit groove 3351 is connected to a corresponding semi-arc groove 3352. The compound buckle clamps 2412 can also be set to corresponding groups, or the number is less than the limit grooves 3351. The advantage of setting the number of compound buckle clamps 2412 consistent with the corresponding groups of limit grooves 3351 is that each compound buckle clamp 2412 can be inserted into the limit groove 3351 and clamped with the corresponding semi-arc groove 3352, thereby realizing a multi-point clamping effect and improving the clamping stability.

[0058] If the number of re-buckles 2412 is less than the number of limit slots 3351 , the limit slots 3351 are more rotatable, and the locking effect can be achieved after any limit slot 3351 is rotated to the position of the re-buckles 2412 .

[0059] Further, refer to Figure 6 As shown, the rack 332 is also connected to a second elastic portion 336, one end of the second elastic portion 336 is connected to the shock absorber 333, and the other end is connected to the rack 332, providing an elastic force for the rack 332 to twist toward the semi-arc groove 3352. The second elastic portion 336 can be a torsion spring, and the second elastic portion 336 applies an elastic force to the rack 332 in a direction away from the limiting groove 3351, so that the groove wall of the semi-arc groove 3352 on the rack 332 can always resist the re-buckle card 2412, thereby preventing the re-buckle card 2412 from returning to the limiting groove 3351 due to bumps or vibrations during riding, and avoiding the risk of the re-buckle card 2412 detaching along the limiting groove 3351.

[0060] When it is necessary to remove the re-snap card 2412, it is only necessary to rotate the re-snap handle 334 and apply an elastic force greater than the elastic force provided by the second elastic portion 336 to drive the re-snap card 2412 from the semi-arc groove 3352 back to the limit groove 3351. At the same time, press down the fastening frame 244 to disengage the fastening protrusion 2441 from the insertion frame 332, and then pull the insertion frame 332 out of the connecting section 2411.

[0061] Further, refer to Figure 6 As shown, a locking groove 3321 is further provided on the side of the inserting frame 332 away from the connecting section 2411, and the locking groove 3321 is staggered with the buckling protrusion 2441. When the buckle sleeve 334 rotates the inserting frame 332 to make the buckle clamp 2412 dock with the limiting groove 3351, the locking groove 3321 and the buckling protrusion 2441 dock synchronously. The function of the locking groove 3321 is to use the elastic force of the first elastic part 243 to make the buckling frame 244 and the buckling protrusion 2441 stuck on the inserting frame 332, and then When the locking groove 3321 rotates to the snap-on protrusion 2441, the snap-on protrusion 2441 is affected by the elastic force of the first elastic portion 243 and then snaps into the locking groove 3321, so that the insertion rack 332 cannot rotate and the composite snap-on clamp 2412 cannot move along the semi-arc groove 3352 and the limit groove 3351, causing the insertion rack 332 to be completely clamped. The composite locking effect of the snap-on protrusion 2441 and the locking groove 3321 is used to fix the position of the insertion rack 332, further increasing the stability of the connection.

[0062] When separation is required, the fastening frame 244 is pushed and the fastening protrusion 2441 is separated from the locking groove 3321. The re-fastening handle 334 can be rotated to stagger the fastening protrusion 2441 and the locking groove 3321, and the re-fastening clamp 2412 is separated from the limit groove 3351 along the semi-arc groove 3352. The fastening frame 244 is then pushed away, and the fastening protrusion 2441 can open the moving path of the insertion rack 332 to remove the insertion rack 332 from the connecting section 2411.

[0063] The groove wall of the locking groove 3321 is an arc-shaped inclined surface, so as to facilitate the buckling protrusion 2441 to be inserted, thereby avoiding the situation of inaccurate insertion position.

[0064] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A carbon fiber folding bicycle, comprising a front fork (1), a seat assembly (2), a frame structure (3), a wheel (4) and a sprocket pedal structure (5); the frame structure (3) is divided into two sections, namely a first frame (31) and a second frame (32); the front fork (1) is mounted on one end of the first frame structure (3), and the seat assembly (2) is mounted on an end of the first frame (31) away from the front fork (1); the wheel (4) is divided into a front wheel (41) and a rear wheel (42), the front wheel (41) is mounted on the bottom of the front fork (1), and the rear wheel (42) is mounted on the second frame (32); the sprocket pedal structure (5) is mounted below the seat assembly (2), connected to the wheel (4), and provides drive; the first frame (31) and the second frame (32) are hinged, characterized in that: A locking structure (6) locked by bolts is provided between the front fork (1) and the first frame structure (3), and the locking structure (6) is connected to an articulated frame (61); the seat assembly (2) comprises a support tube (21), a telescopic structure (22), a seat (23) and a first fastening structure (24); the telescopic structure (22) is plugged into the support tube (21), the seat (23) is mounted on the top of the telescopic structure (22), and the height of the seat (23) is adjusted by the telescopic structure (22); the first fastening structure (24) is mounted on the support tube (21), and a second fastening structure (33) is provided at one end of the second frame (32) close to the first frame (31), and the first fastening structure (24) is snap-connected with the second fastening structure (33).

2. A carbon fiber folding bicycle according to claim 1, characterized in that: The first fastening structure (24) comprises an arc-shaped fastening frame (241), and the arc-shaped fastening frame (241) extends into two connecting sections (2411), both of the connecting sections (2411) are provided with threaded holes, and the two connecting sections (2411) are in a flat semi-box shape, with box openings facing each other; a fastening bolt (242) is provided in the threaded hole, and the fastening bolt (242) is located between the two connecting sections (2411), and is sleeved with a first elastic part (243) and a fastening frame (244); one end of the fastening frame (244) is connected to the first elastic part (243), and the first elastic part (243) provides elastic force for the fastening frame (244) to return to its original position, and the fastening frame (244) is provided with a fastening protrusion (2441) in the form of an arc-shaped hook.

3. A carbon fiber folding bicycle according to claim 2, characterized in that: The second fastening structure (33) comprises a fixing frame (331) and an inserting frame (332); the fixing frame (331) is detachably connected to the second vehicle frame (32); the inserting frame (332) is mounted on the fixing frame (331), and is semi-spherical at one end away from the fixing frame (331); when inserted into the connecting section (2411), it contacts the fastening protrusion (2441) and presses down the fastening protrusion (2441); as the inserting frame (332) continues to extend toward the connecting section (2411), the fastening protrusion (2441) is affected by the elastic force of the first elastic portion (243) and is fastened to the inserting frame (332).

4. A carbon fiber folding bicycle according to claim 3, characterized in that: The second fastening structure (33) further comprises a shock absorber (333); one end of the shock absorber (333) is connected to the fixing frame (331), and the other end is connected to the insertion frame (332).

5. A carbon fiber folding bicycle according to claim 4, characterized in that: The second fastening structure (33) is also provided with a double-buckle handle (334); the double-buckle handle (334) is pivotally connected to the outer wall of the shock absorber (333) and is connected to the insertion frame (332); the insertion frame (332) is pivotally connected to the shock absorber (333), and a plurality of double-buckle grooves (335) are formed on the insertion frame (332); a double-buckle clamp (2412) is provided on the inner wall of the connecting section (2411); when the insertion frame (332) is inserted into the connecting section (2411), the double-buckle handle (334) is rotated and the insertion frame (332) is pushed, so that the double-buckle clamp (2412) is clamped into the double-buckle groove (335).

6. A carbon fiber folding bicycle according to claim 5, characterized in that: The re-locking groove (335) comprises a limiting groove (3351) and a semi-arc groove (3352); the limiting groove (3351) is communicated with the semi-arc groove (3352), and the notches of the limiting groove (3351) are all oriented toward the re-locking clamp (2412); when the inserting frame (332) is inserted, the limiting groove (3351) is plugged into the re-locking clamp (2412), and then when the inserting frame (332) moves to the semi-arc groove (3352), the inserting frame (332) rotates to make the re-locking clamp (2412) snap into the semi-arc groove (3352).

7. A carbon fiber folding bicycle according to claim 6, characterized in that: The limiting grooves (3351) and the semi-arc grooves (3352) are provided in a plurality of groups, and each limiting groove (3351) is correspondingly connected to a semi-arc groove (3352); the number of the re-fastening clamps (2412) is the same as or less than the number of the limiting grooves (3351).

8. A carbon fiber folding bicycle according to claim 6 or 7, characterized in that: The inserting rack (332) is also connected to a second elastic portion (336); the second elastic portion (336) provides elastic force for the inserting rack (332) to twist in the direction of the semi-arc groove (3352).

9. A carbon fiber folding bicycle according to claim 8, characterized in that: A locking groove (3321) is also provided on the inserting frame (332) at a side away from the connecting section (2411); the locking groove (3321) and the buckling protrusion (2441) are staggered, and when the buckling sleeve handle (334) rotates the inserting frame (332) so that the buckling clamp (2412) and the limiting groove (3351) are docked, the locking groove (3321) and the buckling protrusion (2441) are docked synchronously.

10. A carbon fiber folding bicycle according to claim 9, characterized in that: The groove wall of the locking groove (3321) is an arc-shaped inclined surface.

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