JP3083392U - Foldable bicycle frame structure - Google Patents

Abstract

(57) [Problem] To provide a structure of a foldable bicycle frame that can improve the functionality at the time of folding and merging. SOLUTION: A substantially U-shape is formed, and a locking groove, a convex ear,
An upper pedestal having a positioning hole, an inclined guide groove, and a lock groove, a bottom pedestal having a circular wall, a U-shaped groove, a left circular wall, a right circular wall, and a convex body, a lock handle, an eccentric column, a screw, and a washer. , A lock unit having a push block having a radial tooth pattern formed on the back side, a spring, and a hole and a spring provided on the left circular wall and the right circular wall of the bottom pedestal, and a screw of the lock unit. , A fastening pin having a through hole of a convex ear, a circular hole of a circular wall, and an adjustment bolt pivotally provided at the end of the screw.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to the structure of a foldable bicycle frame, and more particularly, to the structure of a foldable bicycle frame that can be folded and combined.

[0002]

[Prior art]

 Conventionally, a foldable bicycle frame includes an upper pedestal, a bottom pedestal, a fastening pin, a positioning pin, and the like. When folding the bicycle frame, operate the fastening pins to rotate the positioning pins, and separate the upper pedestal from the bottom pedestal to fold. Similarly, when combining the frames of the bicycle, the positioning pins are rotated to assemble the upper pedestal and the bottom pedestal, and the fastening pins are fixed to be combined. Research, development, and improvements have been made on the structure of such a folding bicycle frame to improve its functionality when folding and merging.

[0003]

[Problems to be solved by the invention]

 In the structure of the folding bicycle frame as described above, when the top and bottom pedestals of the frame are folded and merged using the fastening pins and positioning pins, it is difficult to operate the fastening pins when folding the bicycle. In addition, there are problems such as loosening of the fastening pins between the upper pedestal and the bottom pedestal while riding a bicycle.

An object of the present invention is to provide a structure of a foldable bicycle frame which can improve the functionality when folding and merging.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the present invention is formed in a substantially U-shape, has two locking grooves in the upper direction of both sides, a convex ear having a through hole at one end of both sides, and An upper pedestal having a positioning hole at the other end, an inclined surface guide groove below the position corresponding to the positioning hole, and a lock groove that can be locked at the front side of the other side, and a circular shape at one end inward. A bottom wall having a circular wall having a hole, a U-shaped groove, a left circular wall, and a right circular wall at the other end; A lock handle, an eccentric column fitted to the head of the lock handle, a screw pivoted on the eccentric column, a washer pivoted on the other end of the screw, and a radial tooth pattern formed on the back side. A lock unit having a push block and a spring, and a lock unit provided on the left circular wall and the right circular wall of the bottom pedestal. A positioning pin having a through hole through which a hole and a spring are pivoted to penetrate a screw of the lock unit; a fastening pin pivotally provided with a through hole of a convex ear of the upper pedestal; and a circular hole of a circular wall of the bottom pedestal. By having the adjusting bolt pivotally provided at the end of the screw, the functionality at the time of folding and merging can be improved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but their configurations do not limit the structure of the present invention.

[0007]

[Embodiment of the invention]

 FIG. 1 is a perspective view showing the structure of the folding bicycle frame of the present invention. FIG. 2 is an exploded perspective view showing the structure of the folding bicycle frame of the present invention. FIG. 3 is a perspective view showing an opened state before the upper pedestal and the bottom pedestal of the present invention are combined. FIG. 4 is a perspective view showing the operation when the folding bicycle frame of the present invention is merged. FIG. 5 is a perspective view showing a structural example of the folding bicycle frame of the present invention.

As shown in FIGS. 1 and 2A, the folding bicycle frame 1 according to the present invention includes an upper pedestal 10, a bottom pedestal 20, a lock unit 30, a positioning pin 40, a fastening pin 50, and springs 36 and 42. , Adjusting bolts 60 and the like. The upper pedestal 10 is formed in a substantially U-shape, and two locking grooves 11 are formed on both sides of the upper pedestal 10 in an upward direction. At one end of each side of the upper pedestal 10, a convex lug 12 having a through hole 13 is provided so as to protrude outward. Positioning holes 14 are formed at the other ends of both sides of the upper pedestal 10. Further, as shown in FIG. 2B, an inclined surface guide groove 15 is formed below a position corresponding to the positioning hole 14. On the front side of the other side of the upper pedestal 10, a lock groove 16 having a shape that can be locked is formed.

The bottom pedestal 20 has a shape corresponding to the upper pedestal 10, and a circular wall 21 is formed at one end of the bottom pedestal 20 so as to be bent inward so as to form a circular hole. I have. The other end of the bottom pedestal 20 has a U-shaped groove 22 and is bent upward to form a parallel left circular wall 23 and right circular wall 24. Also, two convex bodies 25 are formed in the middle on both sides of the bottom pedestal 20 in the outward direction.

A lock handle 31 formed in a whistle shape is installed in the lock unit 30, and an eccentric column 32 is fitted to a head of the lock handle 31. A screw 33 is pivotally connected to the eccentric column 32. At the other end of the screw 33, a washer 34, a push block 35, and a spring 36 are pivotally provided in this order. As shown in FIG. 2C, a radial tooth pattern 37 is formed on the back side of the push block 35.

A through hole 41 is formed in the positioning pin 40 so as to be longer than the width of the bottom pedestal 20. The positioning pins 40 pivot the holes 42 provided in the left circular wall 23 and the right circular wall 24 and the spring 42. The screw 33 of the lock unit 30 passes through a through hole 41 formed in the positioning pin 40 via a spring 36. At this time, the adjusting bolt 60 is screwed into the end of the screw 33. Further, the through-hole 13 of the convex lug 12 of the upper pedestal 10 and the circular wall 21 of the bottom pedestal 20 are pivotally connected to the bottom pedestal 20 by the fastening pins 50. Thereby, the upper pedestal 10 and the bottom pedestal 20 can be rotatably connected.

When the foldable bicycle frame 1 is combined as shown in FIGS. 3 and 4, the upper pedestal 10 is moved so as to cover the upper surface of the bottom pedestal 20. The head of the positioning pin 40 is smoothly fitted into the positioning hole 14 of the upper pedestal 10 by the inclined surface guide groove 15 of the upper pedestal 10. The locking grooves 11 on both sides of the upper pedestal 10 are fitted into the two projections 25 of the bottom pedestal 20. Next, the lock handle 31 is rotated upward by 90 ° so that the screw 33 is parallel to the upper direction, and is rotated and inserted into the lock groove 16 of the upper base 10. At this time, the positioning pin 40 moves the screw 33 to the right by the action force of the spring 42, and the screw 33 is locked in the locking portion of the lock groove 16. Next, the upper pedestal 10 and the bottom pedestal 20 are fixed by rotating the lock handle 31 by 90 ° so as to be horizontal. The radial tooth pattern formed on the lower surface of the push block 35 which comes into contact with the upper part of the periphery of the lock groove 16 of the upper pedestal 10 can increase the contact area, so that the upper pedestal 10 and the bottom pedestal can be stably held without slipping. 20 can be fixed.

Since the adjustment bolt 60 pivotally provided at the end of the screw 33 can finely adjust the length of the screw 33, the lock unit 30 can be operated properly and safely in use. At the same time, the upper pedestal 10 and the bottom pedestal 20 can be connected and fixed.

On the other hand, when folding the foldable bicycle frame 1, the lock handle 31 is lifted so as to be vertical, and the lock handle 31 is rotated with the screw 33. Thus, the lock unit 30 is unlocked, and the upper pedestal 10 and the bottom pedestal 20 are deployed. As shown in FIG. 5, the frame of the foldable bicycle can be folded and joined by welding the frame to the upper pedestal 10 and the bottom pedestal 20.

As described above, when the folding bicycle frame of the present invention is folded or merged, it can be smoothly and efficiently folded and merged, and the frame is fixed so that the frame can be stabilized and the strength can be improved. Can be. Therefore, the functionality at the time of folding and merging can be improved.

[0016]

[Effects of the Invention] As can be seen from the above description and the drawings, in the structure of the folding bicycle frame of the present invention, the functionality at the time of folding and merging can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the structure of the folding bicycle frame of the present invention.

FIG. 2 is an exploded perspective view showing the structure of the folding bicycle frame of the present invention.

FIG. 3 is a perspective view showing an open state before the upper pedestal and the bottom pedestal of the present invention are combined;

FIG. 4 is a perspective view showing the operation of the foldable bicycle frame of the present invention when it is combined.

FIG. 5 is a perspective view showing a structural example of the folding bicycle frame of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foldable bicycle frame 10 Upper pedestal 11 Locking groove 12 Convex ear 13 Through hole 14 Positioning hole 15 Inclined surface guide groove 16 Lock groove 20 Bottom pedestal 21 Circular wall 23 Left circular wall 24 Right circular wall 30 Lock unit 31 Lock handle 32 Eccentric column 33 Screw 34 Washer 35 Push block 36 Spring 36, 42 Spring 40 Positioning pin 50 Tightening pin 60 Adjustment bolt

Claims (1)

[Utility model registration claims] 1. A substantially U-shape, two locking grooves in the upper direction of both sides, a convex ear having a through hole at one end of both sides, a positioning hole at the other end of both sides, An upper pedestal having an inclined surface guide groove below a position corresponding to the positioning hole, a lock groove capable of being locked at a front side of the other side, and a circular wall having a circular hole inward at one end. A bottom pedestal having a U-shaped groove at the other end, a left circular wall, a right circular wall, and two convex bodies that lock the locking groove outward in the middle of both sides; a lock handle; and the lock handle. An eccentric column fitted to the head, a screw pivotally mounted on the eccentric column, and a washer pivotally mounted on the other end of the screw,
A push block in which a radial tooth pattern is formed on the back side, a lock unit having a spring, and a hole and a spring provided in the left circular wall and the right circular wall of the bottom pedestal are pivoted, and A positioning pin having a through hole through which the screw of the lock unit penetrates; a fastening pin pivotally provided with the through hole of the convex ear of the upper pedestal; and a circular hole of the circular wall of the bottom pedestal; And an adjustment bolt pivotally mounted at a distal end of the folding bicycle frame.