Elastic adjusting mechanism of folding bicycle brake cable

Abstract

The utility model discloses an elastic adjusting mechanism for a brake cable of a folding bicycle, the brake cable of the folding bicycle extends along an internal channel of a folding bicycle frame, and one end of the brake cable extends out of the folding bicycle frame through a head tube at the front end of the folding bicycle frame. The folding bicycle frame is characterized in that a fixing clamp is installed on the side wall of the part, extending out of the outer side of a head pipe of the folding bicycle frame, of the brake cable in a locking mode, an elastic piece is arranged on the outer side of the part, extending out of the outer side of the head pipe of the folding bicycle frame, of the brake cable in a sleeving mode, and one end of the elastic piece abuts against the fixing clamp. According to the folding bicycle frame, the situation that the brake cable is clamped and damaged by a folding joint can be avoided, and normal use of a brake is not affected.

Description

Technical Field

[0001] The utility model relates to a folding bicycle, in particular to an elastic adjustment mechanism for a brake line of the folding bicycle. Background Art

[0002] To make it easier to carry around, some bicycles are designed to be foldable. The frames of foldable bicycles can be folded after being unlocked. Some of the original foldable bicycles' brake cables were routed outside the frame. This structure makes the brake cables easily damaged and affects the overall aesthetics of the bicycle. To improve the aesthetics of foldable bicycles, current foldable bicycles all have cables routed inside the frame. The rear section of the brake cable is located inside the rear section of the foldable frame, and the front section of the brake cable is located inside the front section of the foldable frame. When the frame is unlocked and folded, the brake cable bends at the folded position, pulling the front section of the brake cable inside the front section of the frame backward along the front frame. When the frame is unfolded, the brake cable at the folded position often becomes bent and cannot be immediately straightened. Therefore, when the frame is unfolded, the brake cable can easily bend at the folded position and be pinched at the folding connection, even causing the brake cable to break and be damaged. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides an elastic adjustment mechanism for the brake line of a folding bicycle, which can automatically elastically stretch the brake line of the folding bicycle to prevent the brake line from being damaged when the folding bicycle is folded and unfolded.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an elastic adjustment mechanism for the brake cable of a folding bicycle, wherein the brake cable of the folding bicycle extends along an internal channel of the folding frame, and one end of the brake cable extends to the outside of the folding frame through the head tube position at the front end of the folding frame. The utility model is characterized in that a fixing clamp is installed on the side wall of the wire tube of the part of the brake cable extending out of the head tube of the folding frame so as to be stoppable, and an elastic member is sleeved on the outer side of the part of the brake cable extending out of the head tube of the folding frame, one end of the elastic member is tightly against the fixing clamp, and the other end of the elastic member is tightly against the head tube surface of the folding clamp, thereby providing directional elastic tension to the brake cable located in the folding frame.

[0005] As a further improvement of the present invention, the fixing clip is an annular sleeve structure, and the fixing clip is tightly sleeved on the outside of the wire tube of the brake line. One end of the elastic member is tightly against the end surface of the head tube of the fixing clip close to the folding frame, or one end of the elastic member is fixedly connected to the fixing clip.

[0006] As a further improvement of the present invention, the fixing clamp includes a semi-circular columnar left fixing clamp and a semi-circular columnar right fixing clamp, one side wall of the left fixing clamp and one side wall of the right fixing clamp are connected so as to be rotatable relative to each other, the other side wall of the left fixing clamp and the other side wall of the right fixing clamp are connected by snap fastening, and the left fixing clamp and the right fixing clamp are spliced together to form an annular sleeve structure.

[0007] As a further improvement of the present invention, a ring-shaped fixing seat is provided on the outer side of the head tube of the folding frame, and the brake cable extends out of the outer side of the head tube of the folding frame through the ring-shaped fixing seat. The fixing seat at the other end of the elastic member faces away from one end surface of the head tube of the folding frame, or the other end of the elastic member is fixedly connected to the fixing seat.

[0008] As a further improvement of the present invention, a wire outlet is provided on the side wall of the head tube position of the folding frame, the diameter of one end of the fixing seat is larger than the diameter of the other end, the end of the fixing seat with a smaller diameter is inserted into the wire outlet and fixedly connected to the head tube of the folding frame by a buckle, and the end of the fixing seat with a larger diameter is stopped on the outer surface of the head tube position of the folding frame.

[0009] As a further improvement of the present invention, the folding frame includes a front folding frame and a rear folding frame, the rear end of the front folding frame is provided with a front connecting block, and the front end of the rear folding frame is provided with a rear connecting block, the front connecting block is hingedly connected to one side wall of the rear connecting block, and the other side wall of the front connecting block and the rear connecting block can be fixedly connected or opened by fasteners, the front connecting block is provided with a front wire passing port connected to the internal channel of the front folding frame, and the rear connecting block is provided with a rear wire passing port connected to the internal channel of the rear folding frame, a wire clip is provided in the rear wire passing port, and the wire clip is tightly clamped on the outside of the wire tube of the brake line to achieve fixed positioning of the wire tube of the brake line.

[0010] As a further improvement of the present invention, the line card includes an elastically made upper line card and an elastically made lower line card, and at least one semicircular groove is respectively provided on the side walls opposite to the lower line card. The upper line card and the lower line card can be spliced together, and the semicircular groove on the side wall of the upper line card and the semicircular groove on the side wall of the lower line card can be spliced to form a through hole, and the wire tube of the brake line can be tightly clamped in the through hole. After splicing, the upper line card and the lower line card can be tightly inserted into the rear line opening on the rear connecting block.

[0011] As a further improvement of the present invention, the inner side walls of the rear line passing port are respectively provided with an upper card slot and a lower card slot, and the outer side walls of the upper line card and the lower line card are respectively provided with an outwardly protruding upper card point and a lower card point, and the upper card point and the lower card point can be respectively clamped in the upper card slot and the lower card slot of the rear line passing port.

[0012] As a further improvement of the present invention, the outer side walls of the upper line card and the lower line card are respectively provided with an upper avoidance groove and a lower avoidance groove which are opposite to the upper card slot and the lower card slot one by one. The upper avoidance groove and the lower avoidance groove are respectively provided with an upper elastic cantilever structure and a lower elastic cantilever structure which can elastically swing along the depth direction of the upper avoidance groove and the lower avoidance groove. The upper clamping point and the lower clamping point are respectively trapezoidal protrusions fixed on the side walls of the upper elastic cantilever structure and the lower elastic cantilever structure.

[0013] As a further improvement of the present invention, the rear wire passing opening and the front wire passing opening are elliptical holes that are connected to each other, the outer side walls of the upper wire card and the lower wire card respectively form semi-elliptical cylindrical structures, and the opposite side walls of the upper wire card and the lower wire card are respectively connected by splicing grooves and splicing protrusions.

[0014] The beneficial technical effect of the present invention is as follows: the present invention arranges an elastic part on the outer part of the head tube where the brake cable extends out of the front end of the folding frame, and the elastic part elastically presses against the fixing clip fixed on the brake cable, thereby providing a forward elastic pulling force to the brake cable. When the frame is folded, the brake cable automatically overcomes the elastic force of the elastic part and stretches and bends backward as the frame joints fold. When the frame is unfolded, the elastic part automatically provides a forward elastic pulling force to the brake cable, so that the brake cable is automatically straightened to avoid being clamped and damaged at the folding joint. The present invention also provides a wire clip on the rear connecting block of the rear folding frame for fixing the brake cable in the rear folding frame, to avoid the wire tube of the brake cable being pulled by the elastic part during normal riding and affecting the normal use of the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a perspective view of the folding bicycle of the present invention in the unfolded state;

[0016] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0017] Figure 3 This is a front view of the folding bicycle of the present invention in the unfolded state;

[0018] Figure 4 This is a three-dimensional diagram of the folding bicycle of the present invention in the folded state;

[0019] Figure 5 for Figure 4 Enlarged view of middle part B;

[0020] Figure 6 This is a three-dimensional diagram of the line card of the present utility model. DETAILED DESCRIPTION

[0021] Embodiment: An elastic adjustment mechanism for the brake cable of a folding bicycle, wherein the brake cable 1 of the folding bicycle extends along an internal channel of the folding frame, and one end of the brake cable 1 extends to the outside of the folding frame through the head tube 2 at the front end of the folding frame. A fixing clip 3 is installed on the side wall of the wire tube of the part of the brake cable 1 extending out of the head tube 2 of the folding frame so as to be stoppable, and an elastic member 4 is sleeved on the outside of the part of the brake cable 1 extending out of the head tube 2 of the folding frame, one end of the elastic member 4 is tightly against the fixing clip 3, and the other end of the elastic member 4 is tightly against the surface of the head tube 2 of the folding frame, thereby providing directional elastic tension to the brake cable 1 located in the folding frame.

[0022] The brake cable 1 of the folding bicycle, and the speed-changing cable for a folding bicycle with variable speed, are all extended along the internal channel of the folding bicycle clamp, one end of which extends out of the outside of the head tube 2 of the folding frame, and the other end of which extends out of the folding frame and is connected to the brake and transmission at the rear wheel of the vehicle. When the folding frame is folded, the front folding frame 6 and the rear folding frame 7 are folded along the joint where the two are connected, so that the front wheel and the rear wheel are in the same position, and the brake cable 1 (along with the speed-changing cable for a variable speed folding bicycle) bends and deforms at the folding position as the joint flips, and one end of the brake cable 1 (along with the speed-changing cable for a variable speed folding bicycle) moves backward for a distance to adapt to the bending deformation at the folded position of the frame When the folding bicycle is unfolded and the joint is reversed, the brake line 1 (along with the speed-changing line in a variable-speed folding bicycle) is stretched by the elastic member 4, and the curvature of the bending arc gradually becomes smaller as the angle of the joint changes, and the bicycle is finally straightened. When the joint of the folding bicycle is unfolded and locked, the brake line 1 (speed-changing line) will not be clamped at the joint, thereby avoiding the brake line 1 (speed-changing line) being clamped and damaged during the folding and unfolding process of the folding bicycle, thereby ensuring the normal use of brakes and speed changes when the folding bicycle is riding normally. The elastic member 4 is preferably a spring, but can also be other elastically stretchable tubular materials.

[0023] The fixing clamp 3 is an annular sleeve structure, which is tightly mounted on the outside of the brake cable 1. One end of the elastic member 4 is pressed against the end surface of the fixing clamp 3 near the head tube 2 of the folding frame, or one end of the elastic member 4 is fixedly connected to the fixing clamp 3. The fixing clamp 3 is an annular sleeve structure, which uses clamping friction to position the outside of the brake cable 1 (speed cable) pipe. The fixing clamp 3 is easy to install. In addition to the sleeve structure, a convex ring integrally formed on the outside of the brake cable 1 (speed cable) pipe can also be used. This is an equivalent replacement structure that can be easily thought of by those skilled in the art after seeing this patent.

[0024] The retaining clip 3 includes a left retaining clip 31 and a right retaining clip 32 in the shape of a semi-circular column. One sidewall of the left retaining clip 31 is rotatably connected to one sidewall of the right retaining clip 32, and the other sidewall of the left retaining clip 31 is fastened to the other sidewall of the right retaining clip 32 via a snap fastener. The left and right retaining clips 31 and 32 are joined together to form an annular sleeve-like structure. By fastening the left and right retaining clips 31 and 32 together and tightly fitting around the outer side of the wire tube of the brake cable 1 (speed shift cable), the position of the retaining clip 3 can be easily adjusted, thereby varying the elastic tension applied to the brake cable 1 (speed shift cable).

[0025] A ring-shaped fixing seat 5 is provided on the outer side of the head tube 2 of the folding frame. The brake cable 1 extends outward from the outer side of the head tube 2 of the folding frame through the ring-shaped fixing seat 5. The other end of the elastic member 4 is fixed to the fixing seat 5 facing away from one end of the head tube 2 of the folding frame, or the other end of the elastic member 4 is fixedly connected to the fixing seat 5. By installing the fixing seat 5 on the side wall of the head tube 2 of the folding frame, the other end of the elastic member 4 is fixedly positioned by connecting the other end of the elastic member 4 to the fixing seat 5 or pressing against the fixing seat 5, thereby preventing the elastic member 4 from damaging the surface of the head tube 2 of the folding frame.

[0026] A cable outlet is provided on the side wall of the folding frame at the location of the head tube 2. A fixing base 5 has a larger diameter at one end than at the other. The smaller end of the fixing base 5 is inserted into the cable outlet and fixedly connected to the head tube 2 of the folding frame via a snap. The larger end of the fixing base 5 abuts against the outer surface of the head tube 2 of the folding frame. The fixing base 5 is fixedly mounted to the side wall of the head tube 2 of the folding frame via a snap, facilitating frame manufacturing. Alternatively, the fixing base 5 can be welded to the side wall of the head tube 2 of the frame.

[0027] The folding frame includes a front folding frame 6 and a rear folding frame 7. The rear end of the front folding frame 6 is provided with a front connecting block 61, and the front end of the rear folding frame 7 is provided with a rear connecting block 71. The front connecting block 61 is hingedly connected to one side wall of the rear connecting block 71. The other side walls of the front connecting block 61 and the rear connecting block 71 can be fixedly connected or opened by a fastener 8. The front connecting block 61 is provided with a front cable passage 62 that communicates with the internal passage of the front folding frame 6. The rear connecting block 71 is provided with a rear cable passage 62 that communicates with the internal passage of the rear folding frame 7. The rear cable passage is provided with a cable clamp 9. The cable clamp 9 is tightly clamped to the outer side of the cable conduit of the brake cable 1 to fix the cable conduit of the brake cable 1 in place. The cable clamp 9 clamps the cable conduit of the rear section of the brake cable 1 (speed shift cable) to prevent the rear section of the brake cable 1 (speed shift cable) from being pulled by the elastic member 4 during normal unfolded riding, causing it to be disengaged from the rear brake (transmission) or even pulling the rear brake (transmission) and causing riding difficulties.

[0028] The line clamp 9 includes an elastically made upper line clamp 91 and an elastically made lower line clamp 92. The upper line clamp 91 and the lower line clamp 92 are respectively provided with at least one semicircular groove on the side walls opposite to each other. The upper line clamp 91 and the lower line clamp 92 can be spliced together, and the semicircular grooves on the side walls of the upper line clamp 91 and the semicircular grooves on the side walls of the lower line clamp 92 can be spliced to form a through hole 93. The wire tube of the brake cable 1 can be tightly clamped in the through hole 93. After splicing, the upper line clamp 91 and the lower line clamp 92 can be tightly inserted into the rear wire passing port on the rear connecting block 71. The wire clamp 9 with a split splicing structure facilitates the passage of the brake cable 1 (speed cable) and separates and fixes each wire tube in a one-to-one correspondence to avoid mutual squeezing.

[0029] The inner sidewall of the rear wire-passing port is provided with an upper clamping slot and a lower clamping slot, respectively. The outer sidewalls of the upper wire-passing port 91 and the lower wire-passing port 92 are provided with an outwardly protruding upper clamping point 96 and a lower clamping point 97, respectively. The upper clamping point 96 and the lower clamping point 97 can be respectively clamped into the upper clamping slot and the lower clamping slot of the rear wire-passing port. The upper clamping point 96 and the lower clamping point 97 are fastened to the upper clamping slot and the lower clamping slot on the inner sidewall of the rear wire-passing port to achieve the fixed installation of the upper wire-passing port 91 and the lower wire-passing port 92, which is convenient to install.

[0030] The outer walls of the upper and lower line clamps 91 and 92 are respectively provided with an upper avoidance groove 94 and a lower avoidance groove 95, which are directly opposite to the upper and lower clamping grooves. The upper and lower avoidance grooves 94 and 95 contain an upper elastic cantilever structure 98 and a lower elastic cantilever structure 99, which can elastically swing along the depth direction of the upper and lower avoidance grooves 94 and 95, respectively. The upper and lower clamping points 96 and 97 are respectively trapezoidal protrusions fixed on the side walls of the upper and lower elastic cantilever structures 98 and 99. The elastic movement of the upper and lower clamping points 96 and 97 is achieved by the upper and lower elastic cantilever structures 98 and 99, facilitating the assembly of the upper and lower line clamps 91 and 92 and ensuring their stable connection with the rear line port.

[0031] The rear and front cable passages 62 are connected by elliptical holes. The outer sidewalls of the upper and lower cable clips 91 and 92 are semi-elliptical cylinders, and the opposing sidewalls of the upper and lower cable clips 91 and 92 are connected by interlocking splicing grooves and splicing protrusions. The interlocking splicing grooves and splicing protrusions prevent the upper and lower cable clips 91 and 92 from moving relative to each other within the rear cable passage, causing disengagement. The elliptical structure allows them to rotate within the rear cable passage, ensuring that the brake cable 1 and the shift cable are arranged and positioned in parallel, preventing twisting and entanglement, and also preventing the cable clips 9 from rotating and disengaging.

Claims

1. An elastic adjustment mechanism for a brake line of a folding bicycle, wherein the brake line (1) of the folding bicycle extends along an internal channel of the folding bicycle frame, and one end of the brake line extends to the outside of the folding bicycle frame through the head tube (2) at the front end of the folding bicycle frame, and is characterized by: A fixing clamp (3) is installed on the side wall of the wire tube of the outer part of the head tube of the folding frame so as to be stoppable, and an elastic member (4) is sleeved on the outer side of the outer part of the head tube of the folding frame, one end of the elastic member is pressed against the fixing clamp, and the other end of the elastic member is pressed against the head tube surface of the folding clamp, thereby providing directional elastic tension to the brake wire located in the folding frame.

2. The elastic adjustment mechanism for the brake cable of a folding bicycle according to claim 1, characterized in that: The fixing clamp is an annular sleeve structure, which is tightly sleeved on the outside of the brake line tube, and one end of the elastic member is tightly against the end surface of the head tube of the fixing clamp close to the folding frame, or one end of the elastic member is fixedly connected to the fixing clamp.

3. The elastic adjustment mechanism for the brake cable of a folding bicycle according to claim 2, characterized in that: The fixing clamp comprises a semi-circular columnar left fixing clamp (31) and a semi-circular columnar right fixing clamp (32), one side wall of the left fixing clamp is connected to a side wall of the right fixing clamp in a relatively rotatable manner, the other side wall of the left fixing clamp is connected to the other side wall of the right fixing clamp by snap fastening, and the left fixing clamp and the right fixing clamp are spliced together to form an annular sleeve structure.

4. The elasticity adjustment mechanism for a folding bicycle brake cable according to claim 1, characterized in that: A ring-shaped fixing seat (5) is provided on the outer side of the head tube of the folding frame, and the brake line extends out of the outer side of the head tube of the folding frame through the ring-shaped fixing seat. The fixing seat at the other end of the elastic member faces away from one end face of the head tube of the folding frame, or the other end of the elastic member is fixedly connected to the fixing seat.

5. The elasticity adjustment mechanism for the brake cable of a folding bicycle according to claim 4, characterized in that: A wire outlet is provided on the side wall of the head tube position of the folding frame, the diameter of one end of the fixing seat is larger than the diameter of the other end, the end of the fixing seat with a smaller diameter is inserted into the wire outlet and fixedly connected to the head tube of the folding frame by a buckle, and the end of the fixing seat with a larger diameter is stopped on the outer surface of the head tube position of the folding frame.

6. The elasticity adjustment mechanism for a folding bicycle brake cable according to claim 1, characterized in that: The folding frame comprises a front folding frame (6) and a rear folding frame (7), the rear end of the front folding frame is provided with a front connecting block (61), the front end of the rear folding frame is provided with a rear connecting block (71), the front connecting block is hingedly connected to one side wall of the rear connecting block, and the other side walls of the front connecting block and the rear connecting block can be fixedly connected or opened by a fastener (8), the front connecting block is provided with a front wire passing port (62) communicating with the internal channel of the front folding frame, the rear connecting block is provided with a rear wire passing port communicating with the internal channel of the rear folding frame, a wire clip (9) is provided in the rear wire passing port, and the wire clip is tightly clamped on the outer side of the wire tube of the brake line to achieve fixed positioning of the wire tube of the brake line.

7. The elasticity adjustment mechanism for the brake cable of a folding bicycle according to claim 6, characterized in that: The line card comprises an elastically made upper line card (91) and an elastically made lower line card (92), at least one semicircular groove is respectively provided on the side walls opposite to the upper line card and the lower line card, the upper line card and the lower line card can be spliced together, and the semicircular groove on the side wall of the upper line card and the semicircular groove on the side wall of the lower line card can be spliced to form a through hole (93), the wire tube of the brake line can be tightly clamped in the through hole, and the upper line card and the lower line card can be tightly inserted into the rear wire opening on the rear connecting block after being spliced together.

8. The elasticity adjustment mechanism for the brake cable of a folding bicycle according to claim 7, characterized in that: The inner side wall of the rear wire passing port is respectively provided with an upper clamping slot and a lower clamping slot, and the outer side walls of the upper wire clamp and the lower wire clamp are respectively provided with an outwardly protruding upper clamping point (96) and a lower clamping point (97), and the upper clamping point and the lower clamping point can be respectively clamped in the upper clamping slot and the lower clamping slot of the rear wire passing port.

9. The elasticity adjustment mechanism for the brake cable of a folding bicycle according to claim 8, characterized in that: An upper avoidance groove (94) and a lower avoidance groove (95) are respectively provided on the outer side walls of the upper line card and the lower line card, and are opposite to the upper card slot and the lower card slot respectively. An upper elastic cantilever structure (98) and a lower elastic cantilever structure (99) are respectively provided in the upper avoidance groove and the lower avoidance groove, and can be elastically swung along the depth direction of the upper avoidance groove and the lower avoidance groove respectively. The upper clamping point and the lower clamping point are respectively trapezoidal protrusions fixed on the side walls of the upper elastic cantilever structure and the lower elastic cantilever structure.

10. The elasticity adjustment mechanism for the brake cable of a folding bicycle according to claim 7, characterized in that: The rear and front wire-passing openings are oppositely connected elliptical holes, and the outer side walls of the upper and lower wire cards respectively form semi-elliptical column structures, and the opposite side walls of the upper and lower wire cards are respectively connected through plug-in splicing grooves and splicing protrusions.

Images