Foldable frame

Abstract

The foldable frame provided by the invention comprises a bearing part, a handlebar, a front foot, a rear foot, a first locking mechanism and a second locking mechanism, the handlebar is pivotally arranged on the bearing part through a first pivoting shaft; the first locking mechanism is arranged between the handlebar and the bearing part so as to lock or unlock the handlebar and the bearing part; the front foot is pivotally arranged on the bearing part through a second pivoting shaft; the rear leg is pivotally arranged on the bearing part through a third pivoting shaft; a linkage mechanism is connected between the front foot and the rear foot; and the second locking mechanism is arranged between the bearing part and the rear leg or between the bearing part and the front leg so as to lock or unlock the bearing part and the rear leg. Compared with the prior art, the foldable frame provided by the invention not only can be partially folded, but also can be completely folded, so that the foldable frame is suitable for various use scenes, and the functionality of the foldable frame is enriched.

Description

Technical Field

[0001] This invention relates to the field of handcarts, and more particularly to a collapsible cart frame. Background Technology

[0002] Common strollers in daily life include baby strollers and pet strollers. Most strollers have their handlebars, front legs, and rear legs arranged coaxially so that they can be folded and unfolded in unison. Therefore, these strollers only have one folded state and one unfolded state, limiting their applicability to a single scenario.

[0003] Therefore, it is necessary to design a collapsible frame with multiple collapsible states and applicable to multiple usage scenarios to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a collapsible frame that has multiple collapsible states and is applicable to multiple usage scenarios.

[0005] To achieve the above objectives, the present invention provides a collapsible frame comprising a load-bearing portion, a rider, a front foot, a rear foot, a first locking mechanism, and a second locking mechanism; the rider is pivotally mounted on the load-bearing portion via a first pivot axis; the first locking mechanism is disposed between the rider and the load-bearing portion to lock or unlock the latter two; the front foot is pivotally mounted on the load-bearing portion via a second pivot axis; the rear foot is pivotally mounted on the load-bearing portion via a third pivot axis; a linkage mechanism connects the front foot and the rear foot; the second locking mechanism is disposed between the load-bearing portion and the rear foot or between the load-bearing portion and the front foot to lock or unlock the latter two.

[0006] Compared with the prior art, the collapsible frame provided by the present invention pivotally mounts the rider on the support unit and provides a first locking mechanism between the rider and the support unit to lock the rider. Furthermore, it pivotally mounts the front foot and the rear foot on the support unit and provides a second locking mechanism between the support unit and the rear foot or the support unit and the front foot to lock the former two. This makes the folding of the rider independent of the folding of the front and rear feet. As a result, the collapsible frame can fold only the rider, or only the front and rear feet to partially fold, or fold all three feet together, making it suitable for various usage scenarios and enriching the functionality of the collapsible frame.

[0007] Specifically, the linkage mechanism includes a first gear, a second gear, and a third gear. The first gear is disposed on the front foot, the second gear is disposed on the rear foot, and the third gear meshes with the first gear and the second gear respectively, so that the front foot and the rear foot rotate simultaneously.

[0008] Preferably, the first end and the second end of the rider are telescopically connected so that the rider can be retracted onto the support.

[0009] Specifically, the rider includes a drive component, a first linkage component, a first engaging component, and several interconnected tubular sections. The tubular sections are located between a first end and a second end of the rider, and the connection points of each tubular section are locked by the first engaging component. The drive component is located at the second end of the rider and is connected to the first engaging component via the first linkage component, thereby causing the first engaging component to release the connection points of each tubular section.

[0010] Specifically, the driving component includes a first driving button and a connecting seat; the first driving button includes several driving inclined surfaces, and the connecting seat includes several sliding grooves; one end of the first linkage component is accommodated in the sliding groove and contacts the driving inclined surface; the first driving button is slidably disposed relative to the connecting seat to push one end of the first linkage component to slide in the sliding groove, thereby pulling the first engaging component to move.

[0011] Specifically, the first engaging assembly includes a first engaging pin, a first mounting base, and a first slider; the first slider has first driving holes on its opposite sides; the first mounting base includes a guide hole; the first slider is slidably housed in the first mounting base, and the first slider is also connected to the first linkage member; a first reset member is also provided between the first mounting base and the first slider to reset the first slider; the first engaging pin is slidably housed in the first slider, and one end extends out of the first slider and the first mounting base, thereby penetrating the sleeve joint of two adjacent pipe fittings to lock the sleeve joint; a sliding pin is also provided between the two ends of the first engaging pin, the sliding pin penetrating the first engaging pin, and both ends of the sliding pin are simultaneously housed in the first driving hole and the guide hole, so that the first engaging pin can slide along the first driving hole, thereby exiting the sleeve joint of two adjacent pipe fittings to release the sleeve joint of two adjacent pipe fittings.

[0012] Specifically, the first locking mechanism includes a first operating member, a first traction member, and a first locking component; a first receiving groove is also provided on the side of the rider's first end facing the support portion, and a second receiving groove is also provided on the side of the support portion facing the rider's first end; the first locking component is coaxially arranged with the first receiving groove and the second receiving groove; both ends of the first traction member are respectively connected to the first operating member and the first locking component to enable the latter two to work together; the first locking component can cooperate with the first receiving groove and the second receiving groove to release or lock the rider's first end.

[0013] Specifically, the first locking component includes a first locking member, a second locking member, and a second reset member; the first locking member is disposed between the second locking member and the first receiving groove, and the first three are coaxially arranged; the first locking member is connected to the first traction member to be linked with the first operating member; the second reset member is disposed between the second receiving groove and the second locking member to cooperate with the second locking member to unlock or reset the lock; the first locking member has a plurality of first driving grooves at one end facing the first receiving groove, and the first receiving groove has a plurality of first driving protrusions at one end facing the first locking member, the first driving protrusions and the first driving grooves cooperate with each other so that the second locking member can exit the first receiving groove and be completely received in the second receiving groove to release the first end of the rider or part of the rider being engaged in the first receiving groove, and the other part being engaged in the second receiving groove to lock the first end of the rider.

[0014] Specifically, the second locking mechanism includes a second operating member, a second traction member, and a second locking component; a third receiving groove is provided at one end of the rear foot near the bearing portion; the bearing portion further includes a fourth receiving groove, the third receiving groove and the fourth receiving groove being coaxially opposite each other; one end of the second locking component is connected to the second traction member to be linked with the second operating member, and the other end of the second locking component cooperates with the third receiving groove and the fourth receiving groove to lock or release the rear foot.

[0015] Specifically, the second locking component includes a third reset member, a fixed block, a sliding block, a fourth reset member, and a third locking member; the fourth reset member is disposed between the third locking member and the fourth locking groove to cooperate with the third locking member to unlock or reset the lock; the fixed block is connected to the bearing portion; one end of the sliding block is connected to the second traction member, and the sliding block is also slidably connected to the bearing portion; the third reset member is disposed between the fixed block and the sliding block to reset the sliding block; a second driving groove is provided at the end of the sliding block away from the fixed block; a second driving protrusion is provided at the end of the third locking member facing the sliding block; the second driving groove and the second driving protrusion cooperate with each other to allow the third locking member to exit the fourth receiving groove and be fully received in the third receiving groove to release the rear foot, or to be partially received in the third receiving groove and partially received in the fourth receiving groove to lock the rear foot. Attached Figure Description

[0016] Figure 1 This is a side view of the retractable frame provided by the present invention when it is unfolded.

[0017] Figure 2 This is a side view of the collapsible frame provided by the present invention with the front and rear legs collapsing into the bearing portion and the rider portion collapsing.

[0018] Figure 3 This is a side view of the front and rear legs and rider of the collapsible frame provided by the present invention when they are folded into the bearing portion.

[0019] Figure 4 This is a schematic diagram of the retractable frame provided by the present invention when it is unfolded and part of the outer shell of the bearing portion is removed.

[0020] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0021] Figure 6 This is an exploded view of the rider with the collapsible frame provided by the present invention.

[0022] Figure 7 This is a schematic diagram showing the connection of the first operating component, the first traction component, and the first engaging component of the retractable frame provided by the present invention.

[0023] Figure 8 This is a partial cross-sectional view in the orthographic projection direction of the first engaging component of the retractable frame provided by the present invention.

[0024] Figure 9 This is a schematic diagram showing the connection between the load-bearing part, the first locking mechanism, the second locking mechanism, the handle, the front foot, and the rear foot of the collapsible frame provided by the present invention.

[0025] Figure 10 This is a partial cross-sectional view in an orthographic projection direction of the load-bearing part of the collapsible frame provided by the present invention after removing part of the outer shell and connecting it with the front leg, the rear leg and the handle.

[0026] Figure 11 This is an exploded view of the first locking mechanism of the collapsible frame provided by the present invention.

[0027] Figure 12 This is an exploded view from another perspective of the first locking mechanism of the collapsible frame provided by the present invention.

[0028] Figure 13 This is an exploded view of the second locking mechanism of the collapsible frame provided by the present invention.

[0029] Figure 14 This is another exploded schematic diagram of the second locking mechanism of the collapsible frame provided by the present invention.

[0030] Figure 15 This is an exploded view of the second locking mechanism of the collapsible frame provided by the present invention.

[0031] Figure 16 yes Figure 14 Cross-sectional view along the BB direction. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to specific examples and accompanying drawings, and the technical solutions of the present invention will be explained. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0033] Please see Figures 1 to 5 as well as Figure 9The retractable bicycle frame 100 provided by the present invention includes a support part 1, a rider 2, a front foot 3, a rear foot 4, a first locking mechanism 200, and a second locking mechanism 300. The rider 2 is pivotally mounted on the support part 1 via a first pivot shaft 5. The first locking mechanism 200 is disposed between the rider 2 and the support part 1 to lock or unlock the latter two. The front foot 3 is pivotally mounted on the support part 1 via a second pivot shaft 6. The rear foot 4 is pivotally mounted on the support part 1 via a third pivot shaft 7. A linkage mechanism 8 connects the front foot 3 and the rear foot 4. The second locking mechanism 300 is disposed between the support part 1 and the rear foot 4 or between the support part 1 and the front foot 3 to lock or unlock the latter two. The linkage mechanism 8 includes a first gear 81, a second gear 82, and a third gear 83. The first gear 81 is disposed on the front leg 3, the second gear 82 is disposed on the rear leg 4, and the third gear 83 meshes with both the first gear 81 and the second gear 82, so that the front leg 3 and the rear leg 4 rotate simultaneously. Specifically, the first gear 81 is disposed at the end of the front leg 3 near the support part 1, and the second gear 82 is disposed at the end of the rear leg 4 near the support part 1. The radius of the second gear 82 is larger than the radius of the first gear 81, so when retracted, the front leg 3 can rotate faster than the rear leg 4 for faster retraction. Similarly, when the retractable frame 100 is unfolded, the angle formed between the front leg 3 and the rear leg 4 is larger than the angle formed when the front leg 3 and the rear leg 4 are retracted to the support part 1. The end of the front leg 3 away from the support part 1 has a front wheel 31. In this embodiment, the front wheel 31 is connected to the front foot 3 via a connecting block 32. The connecting block 32 can rotate axially relative to the front foot 3, thereby allowing the front wheel 31 to also rotate axially relative to the front foot 3, forming a swivel wheel. The rear foot 4 has a rear wheel 41 at the end away from the bearing part 1. The front foot 3 and the rear foot 4 are provided on opposite sides of the bearing part 1. The two front feet 3 are connected and reinforced by a first connecting rod 33. The two rear feet 4 are connected and reinforced by a second connecting rod 42, and when the collapsible frame 100 is folded, the second connecting rod 42 can serve as a handle to facilitate lifting the collapsible frame 100. To further reinforce the front feet 3 and the rear feet 4 and improve the reliability of use, a reinforcement mechanism 101 is also provided between the front feet 3 and the rear feet 4 on both sides. The reinforcement mechanism 101 includes a support rod 102 and a sliding sleeve 103. One end of the support rod 102 is pivotally connected to the front leg 3, and the other end is pivotally connected to the sliding sleeve 103. The sliding sleeve 103 is fitted onto the rear leg 4. When the front leg 3 and the rear leg 4 are unlocked and rotated, the support rod 102 also rotates accordingly, and the sliding sleeve 103 slides on the rear leg 4.When the front foot 3 and the rear foot 4 are locked together, the support rod 102 and the sliding sleeve 103 are roughly in a straight line, and form a stable triangle with the front foot 3 and the rear foot 4, thereby improving the stability between the front foot 3 and the rear foot 4.

[0034] Further, please refer to Figures 4 to 7 The first end 2A and the second end 2B of the rider 2 are telescopically connected to facilitate the folding of the rider 2 into the support part 1. This design makes the foldable frame 100 more compact and aesthetically pleasing when folded. Specifically, the rider 2 includes a drive component 21, a first linkage component 22, a first engaging assembly 23, and several interconnected tubes 24. The tubes 24 are located between the first end 2A and the second end 2B of the rider 2, and the engagement points of each tube 24 are locked by the first engaging assembly 23. The drive component 21 is located at the second end 2B of the rider 2 and is linked to the first engaging assembly 23 via the first linkage component 22 to drive the first engaging assembly 23 to release the engagement points of each tube 24. In this embodiment, the drive component 21 includes a first drive button 211 and a connecting seat 212. The first drive button 211 includes several drive ramps 2110, and the connecting seat 212 includes several grooves 2120. One end of the first linkage member 22 is housed in the groove 2120 and contacts the drive ramp 2110. When the first drive button 211 is pressed, the drive ramp 2110 presses the end of the first linkage member 22 near the first operation button 211, thereby driving the end of the first linkage member 22 near the first operation button 211 to slide in the groove 2120 to pull the first engaging assembly 23. This arrangement allows the drive member 21 to easily release the rider 2, improving ease of use. Specifically, the tube 24 is disposed on opposite sides of the support portion 1.

[0035] like Figures 6 to 8More specifically, the first engaging assembly 23 includes a first engaging pin 25, a first mounting base 26, and a first slider 27. The first slider 27 has first driving holes 271 on opposite sides. The first mounting base 26 includes guide holes 261. The first slider 27 is slidably housed in the first mounting base 26, and is also connected to the first linkage member 22. To reset the first slider 27, a first reset member 220 is provided between the first slider 27 and the first mounting base 26. The first reset member 220 is a compression spring, with its two ends pressing against the first slider 27 and the first mounting base 26 respectively. The first engaging pin 25 is slidably housed within the first slider 26, with one end extending beyond the first slider 27 and the first mounting base 26, thereby penetrating the joint of two adjacent pipe fittings 24 to lock the joint. A sliding pin 251 is also provided between the two ends of the first locking pin 25. The sliding pin 251 passes through the first locking pin 25, and both ends of the sliding pin 251 are simultaneously accommodated in the first drive hole 271 and the guide hole 261. When the drive member 21 pulls the first slider 27 by the first linkage member 22, the first locking pin 25 slides along the first drive hole 261 and exits the sleeve of the two adjacent tubes 24, thereby releasing the sleeve of the two adjacent tubes 24. More specifically, the second end 2B of the rider 2 is an operating handle. The two ends of the operating handle are respectively connected to the two tubes 24 on the opposite sides of the bearing part 1, thereby facilitating the pushing of the collapsible frame 100.

[0036] Further, please refer to Figures 9 to 12 The first locking mechanism 200 includes a first operating member 201, a first traction member 202, and a first locking assembly 203. A first receiving groove 28 is also provided on the side of the first end 2A of the rider 2 facing the support portion 1. Mounting seats 1C are provided on both outer sides of the first end 1A of the support portion 1. A second receiving groove 11 is also provided on the side of the mounting seat 1C facing the first end 2A of the rider 2. The first locking assembly 203 is coaxially arranged with the first receiving groove 28 and the second receiving groove 11. Figure 11As shown, the axis is 50°. The first operating member 201 is fixedly disposed between the two ends of the rider 2 and is connected to the first locking component 203 via the first traction member 202, for driving the first locking component 203 to move along the axis 50 between the first receiving groove 28 and the second receiving groove 11. When a portion of the first locking component 203 is engaged and received in the first receiving groove 28, and another portion is engaged and received in the second receiving groove 11, the first end 2A of the rider 2 is in a locked state. When the first locking component 203 is fully received in the second receiving groove 11, the first end 2A of the rider 2 is in an unlocked state. In this embodiment, the first locking component 203 includes a second reset member 2030, a first locking member 2031, and a second locking member 2032. The first locking member 2031 is disposed between the second locking member 2032 and the first receiving groove 28, and the first three are coaxially arranged. The first locking member 2031 is connected to the first traction member 202 to be linked with the first operating member 201; the second reset member 2030 is disposed between the second receiving groove 11 and the second locking member 2032 to reset the second locking member 2032; the first locking member 2031 has a plurality of first driving grooves 2033 at one end facing the first receiving groove 28, and the first receiving groove 28 has a plurality of first driving protrusions 281 at one end facing the first locking member 2031, and the first driving protrusions 281 cooperate with the first driving grooves 2033. The first locking member 2031 is also connected to the first traction member 202. When the first operating member 201 pulls the first locking member 2031 via the first traction member 202, the first driving protrusion 281 pushes the first driving groove 2033 to drive the first locking member 2031 away from the first receiving groove 28, thereby pushing the second locking member 2032 completely out of the first receiving groove 28 and completely received in the second receiving groove 11. At this time, the first end 2A of the rider 2 is in an unlocked state. When the rider 2 is rotated through a certain angle, the first operating member 201 is released, the first locking member 2031 is released, and the second locking member 2032 is reset under the action of the second reset member 2030. That is, part of the second locking member 2032 is engaged in the first receiving groove 28 and the other part is engaged in the second receiving groove 11. At this time, the first end 2A of the rider 2 is in a locked state. In this embodiment, the second reset member 2030 is a compression spring. The first operating member 201 is an operating handle (such as...). Figure 4As shown, the operating handle is rotatably mounted on the rider via a bracket, and one end is fixedly connected to one end of the first traction member 202. A return torsion spring is also provided between the operating handle and the bracket for reset. To prevent accidental operation, the first operating member 201 is also provided with a safety button 2010. When it is necessary to drive the first operating member 201 to rotate, the safety button 2010 must be pressed first to release the first operating member 201 before it can be driven to rotate.

[0037] Further, please refer to Figures 9 to 10 as well as Figures 13 to 16The second locking mechanism 300 includes a second operating member 301, a second traction member 302, and a second locking component 303; a third receiving groove 43 is provided at one end of the rear foot 4 near the bearing part 1; a fourth receiving groove 12 is also provided on the mounting base 1C of the bearing part 1, and the third receiving groove 43 and the fourth receiving groove 12 are coaxially opposite each other; one end of the second locking component 303 is connected to the second traction member 302 to be linked with the second operating member 301, and the other end of the second locking component 303 cooperates with the third receiving groove 43 and the fourth receiving groove 12 to lock the rear foot 4. In this embodiment, the second locking component 303 includes a third reset member 3030, a fixing block 3031, a sliding block 3032, a third locking member 3033, and a fourth reset member 3034. The fixing block 3031 is fixedly connected to the bearing portion 1. The fourth reset member 3034 is disposed between the third locking member 3033 and the fourth receiving groove 12 to reset the third locking member 3033. In this embodiment, the fourth reset member 3034 is a compression spring. One end of the sliding block 3032 is connected to the second traction member 302, and the sliding block 3032 is also slidably disposed on the bearing portion 1. The third reset member 3030 is disposed between the fixing block 3031 and the sliding block 3032 to reset the sliding block 3032. Specifically, both the third reset member 3030 and the fourth reset member 3034 are compression springs, and the third reset member 3030 is sleeved on the section of the second traction member 302 located between the fixed block 3031 and the sliding block 3032. A second driving groove 3035 is provided at the end of the sliding block 3032 away from the fixed block 3031; specifically, an elongated hole 3036 is provided in the second driving groove 3035, and the sliding block 3032 is connected to the mounting base 1C of the support part 1 by a pin (not shown in the figure) passing through the elongated hole 3036. When the first slider 3031 pulls the second slider 3032, the second slider 3032 slides relative to the support part 1 through the cooperation of the elongated hole 3036 and the pin. The third locking member 3033 is coaxially arranged with the third receiving groove 43 and the fourth receiving groove 12 for axial engagement, and the third locking member 3033 has a second driving protrusion 3037 at one end facing the sliding block 3032; the second driving groove 3035 and the second driving protrusion 3037 cooperate with each other so that the third locking member 3033 can move axially between the third receiving groove 43 and the fourth receiving groove 12; specifically, the second driving groove 3035 has a concave conical structure, and the second driving protrusion 3037 has a convex conical structure.When the second operating member 301, via the second traction member 302, drives the third locking member 3033 out of the fourth receiving groove 12 and fully accommodates it in the third receiving groove 43, the rear foot 4 is in an unlocked state. When locking is required, the second operating member 301 releases the third locking member 3033, which is then reset by the second reset member 3034. After reset, a portion of the third locking member 3033 is accommodated in the third receiving groove 43, and the other portion is accommodated in the fourth receiving groove 12. At this time, the rear foot 4 is in a locked state.

[0038] The following is a description of the working principle of the collapsible frame 100 provided by the present invention. Please refer to [link / reference]. Figures 1 to 4 as well as Figure 9 and Figure 16 When the retractable frame 100 needs to be fully retracted, the front leg 3 and the rear leg 4 are first released by the second operating member 301 of the second locking mechanism 300. Then, the rear leg 4 is rotated so that the front wheel 32 and the rear wheel 42 are both retracted to the sides of the support part 1. Next, the drive member 21 of the rider 2 releases the tube 24 of the rider 2, and then drives the second end 2B of the rider 2 to retract towards the first end 2A of the rider 2, so that the rider 2 is shortened. Then, the first operating member 201 of the first locking mechanism 200 releases the first end 2A of the rider 2, and then drives the second end 2B of the rider 2 to move towards the bottom end of the support part 1. When the first end 2A of the rider 2 reaches its maximum rotation stroke, the rider 2 is completely folded to the bottom end of the support part 1, and the retractable frame 100 is fully retracted. Of course, the collapsible frame 100 can also be partially folded to retain some functions for different usage scenarios. For example, only the front leg 3 and the rear leg 4 can be folded to reduce space occupation while the load-bearing part 1 retains its load-bearing function. The unfolding of the collapsible frame 100 is the reverse operation of the folding process. Similarly, the first locking mechanism 200 releases the first end 2A of the rider 2, thereby driving the rider 2 to rotate away from the load-bearing part 1 until it reaches its maximum stroke to fully unfold. The second locking mechanism 300 releases the rear leg 4, thereby driving the rear leg 4 and the front leg 3 to rotate and fully unfold to support the load-bearing part 1. The drive member 21 releases the tube 24 of the rider 2, thereby driving the rider 2 to extend. After completing the above operations, the frame 100 has completed the unfolding operation.

[0039] Compared with the prior art, the collapsible frame 100 provided by the present invention pivotally mounts the rider 2 to the support part 1 and provides a first locking mechanism 200 between the rider 2 and the support part 1 to lock the rider 2. Furthermore, by pivotally mounting the front foot 3 and the rear foot 4 on the support part 1 respectively, and providing a second locking mechanism 300 between the support part 1 and the rear foot 4 or between the support part 1 and the front foot 3 to lock the former two, the folding of the rider 2 is independent of the folding of the front foot 3 and the rear foot 4. Thus, the collapsible frame 100 can fold only the rider 2 or only the front foot 3 and the rear foot 4 for partial folding, or it can fold all three of the rider 2, front foot 3, and rear foot 4. This makes it suitable for various usage scenarios and enriches the functionality of the collapsible frame 100.

[0040] The above description discloses only preferred embodiments of the present invention. These embodiments are merely illustrative examples to clearly illustrate the invention and are not intended to limit the scope of implementation. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the protection scope of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the claims of the present invention and remain within the scope of the present invention.

Claims

1. A collapsible vehicle frame (100) characterized by, The application relates to a folding bicycle, which comprises a bearing part (1), a handle (2), a front foot (3), a rear foot (4), a first locking mechanism (200) and a second locking mechanism (300). The handle (2) is pivotally arranged on the bearing part (1) through a first pivot shaft (5). The first locking mechanism (200) is arranged between the handle (2) and the bearing part (1) to lock or release the two. The front foot (3) is pivotally arranged on the bearing part (1) through a second pivot shaft (6). The rear foot (4) is pivotally arranged on the bearing part (1) through a third pivot shaft (7). A linkage mechanism (8) is arranged between the front foot (3) and the rear foot (4). The second locking mechanism (300) is arranged between the bearing part (1) and the rear foot (4) or between the bearing part (1) and the front foot (3) to lock or release the two.

2. The collapsible bicycle frame (100) of claim 1, wherein, The linkage mechanism (8) comprises a first gear (81), a second gear (82) and a third gear (83). The first gear (81) is arranged on the front foot (3), the second gear (82) is arranged on the rear foot (4), and the third gear (83) is engaged with the first gear (81) and the second gear (82) to simultaneously rotate the front foot (3) and the rear foot (4).

3. The collapsible bicycle frame (100) of claim 1, wherein, The first end (2A) and the second end (2B) of the handle (2) are telescopically arranged to enable the handle (2) to be folded on the bearing part (1).

4. The collapsible bicycle frame (100) of claim 1, wherein, The handle (2) comprises a driving member (21), a first linkage member (22), a first clamping assembly (23) and a plurality of pipe members (24) telescopically arranged. The pipe members (24) are arranged between the first end (2A) and the second end (2B) of the handle (2), and the telescopically arranged positions of the pipe members (24) are locked by the first clamping assembly (23). The driving member (21) is arranged at the second end (2B) of the handle (2) and connected with the first clamping assembly (23) through the first linkage member (22) to release the telescopically arranged positions of the pipe members (24).

5. The collapsible cycle frame (100) as claimed in claim 4, wherein, The driving member (21) comprises a first driving button (211) and a connecting seat (212). The first driving button (211) comprises a plurality of driving inclined surfaces (2110), and the connecting seat (212) comprises a plurality of sliding grooves (2120). One end of the first linkage member (22) is accommodated in the sliding grooves (2120) and in contact with the driving inclined surfaces (2110). The first driving button (211) is slidably arranged relative to the connecting seat (212) to push one end of the first linkage member (22) to slide in the sliding grooves (2120) and drive the first clamping assembly (23).

6. The collapsible cycle frame (100) as claimed in claim 4, wherein, The first clamping assembly (23) comprises a first clamping pin (25), a first mounting base (26) and a first slider (27); opposite sides of the first slider (27) are provided with first driving holes (271); the first mounting base (26) comprises a guide hole (261); the first slider (27) is slidably accommodated in the first mounting base (26), and the first slider (27) is further connected with the first linkage (22); a first reset member (220) is further arranged between the first mounting base (26) and the first slider (27) to reset the first slider (27); the first clamping pin (25) is slidably accommodated in the first slider (27), and one end of the first clamping pin (25) extends out of the first slider (27) and the first mounting base (26), thereby penetrating the sleeving part of two adjacent pipe fittings (24) to lock the sleeving part; a sliding pin shaft (251) is further arranged between the two ends of the first clamping pin (25), the sliding pin shaft (251) penetrates the first clamping pin (25), and the two ends of the sliding pin shaft (251) are accommodated in the first driving hole (271) and the guide hole (261) at the same time, so that the first clamping pin (25) can slide along the first driving hole (271), thereby withdrawing from the sleeving part of two adjacent pipe fittings (24) to release the locking of the sleeving part of two adjacent pipe fittings (24).

7. The collapsible bicycle frame (100) of claim 1, wherein, The first locking mechanism (200) comprises a first operating member (201), a first traction member (202) and a first locking assembly (203); one side of the first end (2A) of the handle (2) facing the bearing part (1) is further provided with a first accommodating groove (28), one side of the bearing part (1) facing the first end (2A) of the handle (2) is further provided with a second accommodating groove (11), and the first locking assembly (203) is coaxially arranged with the first accommodating groove (28) and the second accommodating groove (11); the two ends of the first traction member (202) are respectively connected with the first operating member (201) and the first locking assembly (203) to link the latter two; the first locking assembly (203) can cooperate with the first accommodating groove (28) and the second accommodating groove (11) to release or lock the first end (2A) of the handle (2).

8. The collapsible cycle frame (100) as claimed in claim 7, wherein, The first locking assembly (203) comprises a first locking piece (2031), a second locking piece (2032) and a second reset piece (2030); the first locking piece (2031) is arranged between the second locking piece (2032) and the first accommodating groove (28), and the three are coaxially arranged; the first locking piece (2031) is connected with the first traction piece (202) to be linked with the first operating piece (201); the second reset piece (2030) is arranged between the second accommodating groove (11) and the second locking piece (2032) to cooperate with the second locking piece (2032) to unlock or reset the locking; the first locking piece (2031) is provided with a plurality of first driving grooves (2033) at one end thereof facing the first accommodating groove (28), the first accommodating groove (28) is provided with a plurality of first driving protrusions (281) at one end thereof facing the first locking piece (2031), the first driving protrusions (281) and the first driving grooves (2033) are matched with each other, so that the second locking piece (2032) can exit the first accommodating groove (28) and be completely accommodated in the second accommodating groove (11) to release the first end (2A) of the driver (2) or be clamped in the first accommodating groove (28) and the second accommodating groove (11) to lock the first end (2A) of the driver (2).

9. The collapsible bicycle frame (100) of claim 1, wherein, The second locking mechanism (300) comprises a second operating piece (301), a second traction piece (302) and a second locking assembly (303); one end of the second locking assembly (303) is connected with the second traction piece (302) to be linked with the second operating piece (301), and the other end of the second locking assembly (303) is matched with the third accommodating groove (43) and the fourth accommodating groove (12) to lock or release the rear leg (4).

10. The collapsible cycle frame (100) as claimed in claim 9, wherein, The second locking assembly (303) comprises a third reset member (3030), a fixed block (3031), a sliding block (3032), a third locking member (3033) and a fourth reset member (3034); the fourth reset member (3034) is arranged between the third locking member (3033) and the fourth locking groove (12) to cooperate with the third locking member (3033) to unlock or reset the locking; the fixed block (3031) is connected to the bearing part (1); one end of the sliding block (3032) is also connected to the second traction member (302), and the sliding block (3032) is also slidably connected to the bearing part (1); the third reset member (3030) is arranged between the fixed block (3031) and the sliding block (3032) to reset the sliding block (3032); one end of the sliding block (3032) away from the fixed block (3031) is provided with a second driving groove (3035); one end of the third locking member (3033) towards the sliding block (3032) is provided with a second driving protrusion (3037); the second driving groove (3035) and the second driving protrusion (3037) are matched with each other to enable the third locking member (3033) to exit the fourth accommodating groove (12) and be completely accommodated in the third accommodating groove (43) to release the locking of the rear leg (4) or a part of the rear leg (4) is accommodated in the third accommodating groove (43) and the other part is accommodated in the fourth accommodating groove (12) to lock the rear leg (4).

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