Folding bicycle frame

Abstract

The utility model relates to the technical field of bicycles, in particular to a folding bicycle frame which comprises a front frame body, a first folding joint is arranged at the top end of the front frame body, a handlebar is connected to the top wall of the first folding joint, a front fork is arranged on the bottom wall of the front frame body, and a front wheel is installed on the front fork; a first connecting beam is arranged on the front frame body, and a second folding joint is connected to the side, away from the front frame body, of the first connecting beam; one side, far away from the first connecting beam, of the second folding joint is connected with a second connecting beam; the side, away from the first connecting beam, of the second connecting beam is connected with a rear frame. The bottom wall of the first connecting beam is provided with a containing groove, a balance structure is installed in the containing groove, the balance structure is used for abutting against the ground when the frame is in the folded state, and compared with an existing frame needing to be carried by hands, the effect of reducing labor intensity is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycles, in particular to a folding bicycle frame. BACKGROUND

[0002] The current folding bicycle is a super light bicycle, which is unique in small size, foldable, delicate design, excellent material and excellent manufacturing process. The current folding bicycle can be divided into horizontal, vertical and M-type folding modes. The horizontal folding bicycle has low production cost and is easy and fast to fold.

[0003] The existing folding bicycle is at least reduced to half of the original size, which can reduce the transportation cost from the factory to the consumer end. On the other hand, when the consumer wants to load the bicycle into a small car or a recreational vehicle to a remote location, the folded bicycle will not occupy too much space in the small car or the recreational vehicle.

[0004] The prior art in the above has the following defects: although the existing horizontal folding frame has realized the folding mode, but in the specific use scene, for example, in the scene of carrying a small folding bicycle for a long time and frequently changing public transportation, the transportation needs to carry the folded bicycle, which has the problem of high labor intensity. CONTENT OF THE INVENTION

[0005] The present application is provided in order to reduce the labor intensity of the folded bicycle frame during transportation, and provides a folding bicycle frame.

[0006] The above technical purpose of the present application is realized by the following technical scheme:

[0007] A folding bicycle frame, comprising a front frame body, a first folding joint is arranged at the top end of the front frame body, a handlebar is connected to the top wall of the first folding joint, a front fork is arranged on the bottom wall of the front frame body, and a front wheel is installed on the front fork; a first connecting beam is arranged on the front frame body, a second folding joint is connected to the side of the first connecting beam away from the front frame body; and a second connecting beam is connected to the side of the second folding joint away from the first connecting beam; a rear frame is connected to the side of the second connecting beam away from the first connecting beam, the rear frame comprises a seat tube and a connecting frame, the axis direction of the seat tube is in a vertical state, and a seat is connected to the top wall of the seat tube; the connecting frame is arranged at the rear end of the seat tube, and a rear wheel is rotatably arranged on the connecting frame; a placing groove is arranged on the bottom wall of the first connecting beam, and a balance structure is installed in the placing groove, the balance structure is used for abutting against the ground when the frame is in a folded state.

[0008] By adopting the above scheme, the frame can be folded with the first folding joint and the second folding joint as the rotation axes, the handlebar and the rear wheel are located on the two sides of the front wheel after folding, and the balance structure is arranged to abut against the ground after the frame is folded, so that the folded frame is in a balanced state, and thus the folded frame can be pushed along the ground, thereby reducing the labor intensity of the user in moving the folded frame compared with the existing frame that needs to be carried by hand.

[0009] Further, the balance structure comprises a connecting assembly, a locking assembly and a supporting assembly, the connecting assembly comprises a horizontal rod and a rotating cylinder, the horizontal rod is arranged at one end of the placing groove and extends along the width direction of the placing groove, the two ends of the horizontal rod are fixedly connected with the two sides of the placing groove, the rotating cylinder is sleeved on the horizontal rod and is rotationally connected with the horizontal rod, one end of the supporting assembly is fixedly connected with the rotating cylinder, and the other end is used for abutting against the ground; the locking assembly is used for locking the state of the supporting assembly abutting against the ground and the state of being stored in the placing groove.

[0010] Further, the supporting assembly comprises two supporting rods which are arranged side by side, and one end of each supporting rod is fixedly connected with the outer wall of the rotating cylinder; one universal roller is fixedly connected to the side of each supporting rod away from the rotating cylinder.

[0011] Further, the locking assembly comprises a first clamping piece and a second clamping piece, the first clamping piece is fixedly connected with the side wall of the rotating cylinder, the first clamping piece is annular, a plurality of insertion holes are formed in the side wall of the first clamping piece away from the rotating cylinder, and the plurality of insertion holes are uniformly arranged along the circumferential side of the first clamping piece; the second clamping piece is sleeved outside the horizontal rod, the second clamping piece can move towards or away from the first clamping piece along the length direction of the horizontal rod, the diameter of the second clamping piece is consistent with that of the first clamping piece, a plurality of insertion blocks are arranged on the side of the second clamping piece close to the first clamping piece, the plurality of insertion blocks are uniformly arranged along the circumferential side of the second clamping piece, and the spacing between adjacent insertion blocks is consistent with the spacing between adjacent insertion holes; the side wall of the placing groove is provided with a threaded rod, the axis direction of the threaded rod is consistent with the axis direction of the horizontal rod, the threaded rod is threadedly connected with the side wall of the placing groove and rotationally connected with the side of the second clamping piece away from the insertion blocks; the length of the rotating cylinder is less than the length of the horizontal rod.

[0012] Further, a limiting strip is protruded on the surface of the horizontal rod along the axial direction of the horizontal rod, and a limiting groove is formed in the inner ring of the second clamping piece and is inserted and matched with the limiting strip.

[0013] Further, the placing groove is provided with a pulling groove which is recessed away from the side wall of the universal wheel, a pulling plate is slidably connected in the pulling groove, the pulling plate can slide out of the pulling groove and cover the slot of the placing groove; a plurality of elastic members are arranged in the placing groove, the axis direction of the elastic member is consistent with the sliding direction of the pulling plate, one end of the elastic member is fixedly connected with the side wall of the placing groove, and the other end is fixedly connected with the side wall of the pulling plate.

[0014] Further, the elastic member is used for pushing the pulling plate to slide out of the pulling groove, and when the elasticity of the elastic member is stretched to the maximum value, a part of the pulling plate is located in the pulling groove and a part of the pulling plate covers the surface of the placing groove.

[0015] Further, the placing groove is provided with a pulling groove which is recessed away from the side wall of the universal wheel, a pulling plate is slidably connected in the pulling groove, the pulling plate can slide out of the pulling groove and cover the slot of the placing groove; a plurality of elastic members are arranged in the placing groove, the axis direction of the elastic member is consistent with the sliding direction of the pulling plate, one end of the elastic member is fixedly connected with the side wall of the placing groove, and the other end is fixedly connected with the side wall of the pulling plate.

[0016] In summary, the present application has the following technical effects:

[0017] 1. By arranging the frame, the frame can be folded around the first folding joint and the second folding joint as the rotation shaft, the handlebar and the rear wheel are located on the two sides of the front wheel after folding, and because the balance structure is arranged, the balance structure is in abutment with the ground after the frame is folded, so that the folded frame is in a balanced state, so the folded frame can be pushed to move along the ground, so the user can drive the folded frame to move, which is more labor-saving than the existing frame which needs to be carried by hand.

[0018] 2. By arranging the universal wheel, the frictional force of the balance assembly when moving relative to the ground is reduced, which facilitates the transportation of the folded frame.

[0019] 3. By arranging the locking assembly, the balance assembly can be folded and unfolded, and the balance assembly can be folded when the frame is unfolded, so as to avoid the intervention of the balance assembly during riding. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of a folding bicycle frame of the present application;

[0021] Figure 2 is a structural schematic view of the folding bicycle frame after folding of the present application;

[0022] Figure 3 is a structural schematic view of the placing groove of the present application;

[0023] Figure 4 is a structural schematic view of the balance structure of the present application.

[0024] In the figure, 1, front frame body; 11, front fork; 12, front wheel; 13, handlebar; 2, first folding joint; 3, first connecting beam; 4, second folding joint; 5, second connecting beam; 6, rear frame; 61, seat tube; 62, connecting frame; 621, rear wheel; 7, placing groove; 71, anti-falling groove; 8, balance structure; 81, connecting assembly; 811, cross rod; 8111, limiting strip; 812, rotating cylinder; 82, locking assembly; 821, first clamping piece; 8211, insertion hole; 822, second clamping piece; 8221, insertion block; 8222, limiting groove; 823, threaded rod; 83, supporting assembly; 831, supporting rod; 832, universal roller; 833, reinforcing rod; 9, pulling groove; 91, elastic piece; 92, pulling plate; 10, saddle; 20, baffle. DETAILED DESCRIPTION

[0025] The application will be further described in detail below with reference to the drawings.

[0026] Referring to Figure 1 , the folding bicycle frame provided by the embodiment comprises a front frame body 1, the top end of the front frame body 1 is provided with a first folding joint 2, the top wall of the first folding joint 2 is connected with a handlebar 13, the handlebar 13 can be folded about the first folding joint 2, the handlebar 13 is located on the side wall of the front wheel 12 after being folded, and the handlebar 13 can rotate, so that the connecting beam between the two handlebars of the folded handlebar 13 is consistent with the length direction of the vehicle body.

[0027] Referring to Figure 1 , the bottom wall of the front frame body 1 is provided with a front fork 11, the front fork 11 is installed with a front wheel 12, the rear end of the front frame body 1 is provided with a first connecting beam 3, the first connecting beam 3 is fixedly connected with the front frame body 1, the side of the first connecting beam 3 away from the front frame body 1 is connected with a second folding joint 4, and the side of the second folding joint 4 away from the first connecting beam 3 is connected with a second connecting beam 5, the second folding beam 5 and the first connecting beam 3 can be folded through the second folding joint 4.

[0028] Referring to Figures 1-2 , the side of the second connecting beam 5 away from the first connecting beam 3 is connected with a rear frame 6, the rear frame 6 is fixedly connected with the first connecting beam 3; the rear frame 6 comprises a seat tube 61 and a connecting frame 62, the axis direction of the seat tube 61 is in a vertical state, and the top wall of the seat tube 61 is connected with a saddle 10; the connecting frame 62 is arranged at the rear end of the seat tube 61, and the connecting frame 62 is rotatably provided with a rear wheel 621; when the second folding beam 5 and the first connecting beam 3 can be folded through the second folding joint 4, the rear wheel 621 is located on the side of the front wheel 12 away from the handlebar 13.

[0029] Referring to Figure 1It should be noted that the base components of the frame are common knowledge to those skilled in the art, so the connection between some existing components is not described in detail in the present application, and it should be noted that the specific model and specifications of the first folding joint 2 and the second folding joint 4 need to be selected and determined according to the actual specifications of the device, and the specific selection and calculation method uses existing technology in the art, so it is not described in detail. The first folding joint 2 and the second folding joint 4 are devices or equipment already existing in existing folding bicycles, or devices or equipment that can be realized in existing folding bicycles. Their power supply, specific composition and principles are clear to those skilled in the art and are common knowledge in the art, so they are not described in detail.

[0030] With reference to Figure 1 , the bottom wall of the first connecting beam 3 is provided with a placing groove 7, and the balance structure 8 is installed in the placing groove 7. The balance structure 8 is used to abut against the ground when the frame is in a folded state, and can be moved along the ground by applying an external force, achieving the effect of facilitating transportation of the folded frame.

[0031] With reference to Figures 1-4 , specifically, the axis of the second folding joint 4 is not perpendicular to the ground, but has a certain slope. When the rear wheel 621 is folded to the side of the front wheel 12 through the second folding joint 4, the rear wheel 621 has a certain distance from the ground. Compared with the state that the front wheel 12 and the rear wheel 621 of the folded frame 6 are both in abutment with the ground, in the present application, only the front wheel 12 of the folded frame is in abutment with the ground. When pushing the folded frame, the balance structure 8 and the front wheel 12 jointly move along the ground, and the rear wheel 621 does not participate, avoiding the problem that the rear wheel 621 moves along the ground and drives the foot support on the frame body to rotate through the chain on the frame body, causing interference between the foot support and the frame body, and further causing the folded frame to be unable to move. When the frame is folded, the operator can use the saddle 10 as a support point to move the folded frame by pushing the saddle 10.

[0032] With reference to Figures 1-4, the balancing structure 8 comprises a connecting assembly 81, a locking assembly 82 and a supporting assembly 83, the connecting assembly 81 comprises a crossbar 811 and a rotating cylinder 812, the crossbar 811 is arranged at one end of the placing groove 7, and the crossbar 811 is arranged along the width direction of the placing groove 7, both ends of the crossbar 811 are fixedly connected with both sides of the placing groove 7, the rotating cylinder 812 is sleeved on the crossbar 811, and the rotating cylinder 812 is rotationally connected with the crossbar 811; one end of the supporting assembly 83 is fixedly connected with the rotating cylinder 812, and the other end is used for abutting against the ground, when the frame is in the stretched state, the supporting assembly 83 is stored in the placing groove 7, when the frame is in the folded state, the supporting assembly 83 is rotated about the rotating cylinder 812 to abut against the ground, so that the supporting assembly 83 and the front wheel 12 jointly support the frame and can move along the ground; the locking assembly 82 is used for locking the state of abutting against the ground of the supporting assembly 83 and the state of being stored in the placing groove 7.

[0033] With reference to Figures 1-4 , the supporting assembly 83 comprises two supporting rods 831, universal rollers 832 and a reinforcing rod 833, the two supporting rods 831 are arranged side by side, and the reinforcing rod 833 is arranged between the two supporting rods 831, both ends of the reinforcing rod 833 are fixedly connected with the two supporting rods 831 respectively, the length direction of the reinforcing rod 833 is horizontal to the length direction of the rotating cylinder 812, and the reinforcing rod 833 is used for connecting the two supporting rods 831, so as to increase the strength of the supporting rods 831; specifically, one end of each supporting rod 831 is fixedly connected with the outer wall of the rotating cylinder 812, and the other end is fixedly connected with one universal roller 832, in the embodiment, the universal rollers 832 can be selected according to the use requirements on site.

[0034] With reference to Figures 1-4, two locking assemblies 82 are arranged on two sides of the rotating cylinder 812, each of the locking assemblies 82 comprises a first clamping piece 821 and a second clamping piece 822, the first clamping piece 821 is fixedly connected with the side wall of the rotating cylinder 812, and the first clamping piece 821 is annular, and a plurality of insertion holes 8211 are formed in the side of the first clamping piece 821 away from the side wall of the rotating cylinder 812, and the plurality of insertion holes 8211 are uniformly arranged along the circumferential side of the first clamping piece 821; the second clamping piece 822 is sleeved outside the horizontal rod 811, and the second clamping piece 822 can move towards or away from the first clamping piece 821 along the length direction of the horizontal rod 811, the diameter of the second clamping piece 822 is consistent with that of the first clamping piece 821, a plurality of insertion blocks 8221 are arranged on the side of the second clamping piece 822 close to the first clamping piece 821, and the plurality of insertion blocks 8221 are uniformly arranged along the circumferential side of the second clamping piece 822, and the spacing between adjacent insertion blocks 8221 is consistent with the spacing between adjacent insertion holes 8211; the side wall of the placing groove 7 is provided with a threaded rod 823, the axis direction of the threaded rod 823 is consistent with the axis direction of the horizontal rod 811, and the threaded rod 823 is threadedly connected with the side wall of the placing groove 7 and rotationally connected with the side of the second clamping piece 822 away from the insertion blocks 8221.

[0035] With reference to Figures 1-4 It should be noted that the length of the rotating cylinder 812 is less than the length of the horizontal rod 811, that is, the distance between each side of the rotating cylinder 812 and the end point close to it on the horizontal rod 811 is a distance, and the distance is the moving distance of the second clamping piece 822, so that the second clamping piece 822 can be engaged or separated from the first clamping piece 821; the surface of the horizontal rod 811 is provided with a limiting strip 8111 protruding along the axial direction of the horizontal rod 811, and the inner ring of the second clamping piece 822 is provided with a limiting groove 8222, the limiting groove 8222 is inserted and matched with the limiting strip 8111, when the second clamping piece 822 is driven to move along the surface of the horizontal rod 811, the limiting groove 8222 moves along the limiting strip 8111, and the limiting effect of the second clamping piece 822 is achieved.

[0036] With reference to Figures 1-4The inside of the placing groove 7 is fixedly connected with a baffle 20 which is perpendicular to the ground, the baffle 20 is arranged along the width direction of the placing groove 7, the two sides of the baffle 20 are fixedly connected with the two sides of the placing groove 7, and the baffle 20 is used for limiting the maximum angle of the rotating cylinder 812 rotating along the cross rod 811. Specifically, after the frame is folded, the support rod 831 is rotated as the rotating cylinder 812, and when the support rod 831 abuts against the baffle 20, the support rod 831 cannot be continuously rotated towards the baffle 20. At this time, the threaded rod 823 is rotated, and since the threaded rod 823 is threadedly connected with the side wall of the placing groove 7, after the threaded rod 823 is rotated, the threaded rod 823 rotates along the axis direction of the threaded rod 823 and pushes the second clamping part 822 to move towards the first clamping part 821 until each insertion block 8221 is clamped with the corresponding insertion hole 8211.

[0037] With reference to Figures 1-4 It should be noted that the insertion hole 8211 on the first clamping part 821 and the insertion block 8221 on the second clamping part 822 can be one-to-one clamped and matched in two states of being completely accommodated in the placing groove 7 and abutting against the ground after the support assembly 83 interferes with the baffle 20. Specifically, the number of support blocks and insertion holes 8211, and the angle between adjacent insertion blocks 8221 and adjacent insertion holes 8211 can be calculated and determined by a person skilled in the art through a known calculation formula, and the calculation method will not be described in detail here.

[0038] With reference to Figures 1-4 The side wall of the placing groove 7 close to the universal roller 832 is inwardly recessed to form a pulling groove 9, and a pulling plate 92 is slidably connected in the pulling groove 9. The pulling plate 92 can slide out of the pulling groove 9 and cover the slot opening of the placing groove 7. A plurality of elastic elements 91 are arranged in the placing groove 7, the axis direction of the elastic elements 91 is consistent with the sliding direction of the pulling plate 92, one end of the elastic elements 91 is fixedly connected with the side wall of the placing groove 7, and the other end is fixedly connected with the side wall of the pulling plate 92. In the embodiment, the elastic elements 91 are preferably extension springs. Under the action of no other external force, the elastic elements 91 can push the pulling plate 92 to slide out of the pulling groove 9 under the elastic action of the elastic elements 91. When the elastic elements 91 are stretched to the longest value, part of the pulling plate 92 is located in the pulling groove 9 and part of the pulling plate 92 covers the surface of the placing groove 7. When the support assembly 83 is accommodated in the placing groove 7, the pulling plate 92 is used for blocking part of the support assembly 83. Since the locking assembly 82 is also arranged in the application, the pulling plate 92 and the locking assembly 82 jointly limit the support assembly 83, thereby enhancing the limiting effect of the support assembly 83.

[0039] With reference to ​The two sides of the placing groove 7 are provided with anti-disengagement grooves 71 along the length direction of the placing groove 7, and the two sides of the pull plate 92 are respectively embedded in the two anti-disengagement grooves 71, so that the movement direction of the pull plate 92 is limited, and the extension direction of the elastic member 91 is further limited.

[0040] The specific implementation principle of the folding bicycle frame is as follows: first, the first folding joint 2 and the second folding joint 4 are taken as the rotating shafts to fold the bicycle frame, then the threaded rods 823 on the two sides of the placing groove 7 are rotated to separate the first clamping member 821 from the second clamping member 822, and the limiting of the rotating cylinder 812 is released; then the pull plate 92 is pushed in the direction of the compression elastic member 91 to make the placing groove 7 completely open, then the supporting rod 831 is pulled out through the placing groove 7 to make the supporting rod 831 abut against the baffle 20; then the threaded rods 823 on the two sides of the placing groove 7 are rotated to make the plug-in blocks 8221 correspond to the plug-in holes 8211 one by one, and the state that the universal wheels 832 abut against the ground is limited; then the operator can push the folded bicycle frame by hand.

[0041] The specific embodiment is only an explanation of the application, and is not a limitation of the application, and those skilled in the art can make modifications to the embodiment without creative contribution according to the needs after reading the specification, but as long as the modifications are within the scope of the claims of the application, they are protected by the Patent Law.

Claims

1. A folding bicycle frame characterized in that: a front frame body (1) is provided with a first folding joint (2) at the top end, a handlebar (13) is connected to the top wall of the first folding joint (2), and a front fork (11) is arranged on the bottom wall of the front frame body (1) and a front wheel (12) is mounted on the front fork (11); a first connecting beam (3) is arranged on the front frame body (1), a second folding joint (4) is connected to the side of the first connecting beam (3) away from the front frame body (1), and a second connecting beam (5) is connected to the side of the second folding joint (4) away from the first connecting beam (3); a rear frame (6) is connected to the side of the second connecting beam (5) away from the first connecting beam (3), the rear frame (6) comprises a seat tube (61) and a connecting frame (62), the axis direction of the seat tube (61) is vertical, and a seat (10) is connected to the top wall of the seat tube (61); the connecting frame (62) is arranged at the rear end of the seat tube (61), and a rear wheel (621) is rotatably arranged on the connecting frame (62); a placing groove (7) is formed in the bottom wall of the first connecting beam (3), a balance structure (8) is mounted in the placing groove (7), and the balance structure (8) is used for abutting against the ground when the frame is in a folded state.

2. A folding bicycle frame according to claim 1, wherein: The balance structure (8) comprises a connecting assembly (81), a locking assembly (82) and a supporting assembly (83), the connecting assembly (81) comprises a cross rod (811) and a rotating cylinder (812), the cross rod (811) is arranged at one end of the placing groove (7) and extends along the width direction of the placing groove (7), both ends of the cross rod (811) are fixedly connected to both sides of the placing groove (7), the rotating cylinder (812) is sleeved on the cross rod (811) and is rotatably connected to the cross rod (811), one end of the supporting assembly (83) is fixedly connected to the rotating cylinder (812), and the other end is used for abutting against the ground; the locking assembly (82) is used for locking the state of the supporting assembly (83) abutting against the ground and the state of being stored in the placing groove (7).

3. A folding bicycle frame according to claim 2, wherein: The supporting assembly (83) comprises two supporting rods (831), the two supporting rods (831) are arranged side by side, and one end of each supporting rod (831) is fixedly connected to the outer wall of the rotating cylinder (812); one universal roller (832) is fixedly connected to the side of each supporting rod (831) away from the rotating cylinder (812).

4. A folding bicycle frame according to claim 3, wherein: The locking assembly (82) comprises a first clamping piece (821) and a second clamping piece (822), the first clamping piece (821) is fixedly connected with the side wall of the rotating cylinder (812), the first clamping piece (821) is annular, a plurality of insertion holes (8211) are formed in the side of the first clamping piece (821) away from the side wall of the rotating cylinder (812), and the plurality of insertion holes (8211) are uniformly arranged along the circumferential side of the first clamping piece (821); the second clamping piece (822) is arranged on the outer side of the cross rod (811), the second clamping piece (822) can move towards or away from the first clamping piece (821) along the length direction of the cross rod (811), the diameter of the second clamping piece (822) is consistent with that of the first clamping piece (821), a plurality of insertion blocks (8221) are arranged on the side of the second clamping piece (822) close to the first clamping piece (821), the plurality of insertion blocks (8221) are uniformly arranged along the circumferential side of the second clamping piece (822), and the spacing between adjacent insertion blocks (8221) is consistent with the spacing between adjacent insertion holes (8211); the side wall of the placing groove (7) is provided with a threaded rod (823), the axis direction of the threaded rod (823) is consistent with the axis direction of the cross rod (811), and the threaded rod (823) is threadedly connected with the side wall of the placing groove (7) and rotationally connected with the side of the second clamping piece (822) away from the insertion blocks (8221). The length of the rotating cylinder (812) is less than the length of the cross rod (811).

5. A folding bicycle frame according to claim 4, wherein: The surface of the cross rod (811) is provided with a limiting strip (8111) protruding in the axial direction of the cross rod (811), and a limiting groove (8222) is formed in the inner ring of the second clamping piece (822), and the limiting strip (8111) is inserted into the limiting groove (8222).

6. A folding bicycle frame according to claim 2, wherein: The side wall of the placing groove (7) close to the universal roller (832) is provided with a pulling groove (9) recessed away from the placing groove (7), and the pulling plate (92) is slidably connected in the pulling groove (9). The placing groove (7) is provided with a plurality of elastic members (91), the axis direction of the elastic member (91) is consistent with the sliding direction of the pulling plate (92), one end of the elastic member (91) is fixedly connected with the side wall of the placing groove (7), and the other end is fixedly connected with the side wall of the pulling plate (92).

7. A folding bicycle frame according to claim 6, wherein: The elastic member (91) is used for pushing the pulling plate (92) to slide out of the pulling groove (9), and when the elasticity of the elastic member (91) is stretched to the maximum value, part of the pulling plate (92) is located in the pulling groove (9) and part of the pulling plate (92) covers the surface of the placing groove (7).

8. A folding bicycle frame according to claim 7, wherein: The two sides of the placing groove (7) are provided with anti-disengagement grooves (71) along the length direction of the placing groove (7), and the two sides of the pulling plate (92) are respectively embedded in the two anti-disengagement grooves (71).

Images