JP2002160688A - Folding bicycle stored in bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding bicycle stored in a bag to make the bicycle portable, and attain compactness and lightening of weight. SOLUTION: By individually installing a system for transmitting rotation of a pedal on both sides in a rear wheel, and by dividing car body frames 1, 2 and 3 into three parts a single operation system in even the other structure, the storage can be made by a slide system, a saddle post 5, a handle post 15, and a front frame 18, are applied with a folding type.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact and lightweight folding bicycle.

[0002]

2. Description of the Related Art A conventional folding bicycle has a structure that folds between a front wheel and a rear wheel, and is folded in a state in which a petal crank gear is located outside a wheel when folded.

[0003]

For this reason, the conventional folding bicycle has a large bulk when folded, and a large container is required when using a bag or the like, and it is difficult to carry the bicycle.

[0004]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention relates to a petal crank gear 6, 6a and a chain 1;
1, 11a and rear wheel gears 7 and 7a are formed on the right and left sides of the inside of the rear wheel as shown in FIG. 3, and a body frame 1 holding the rear wheel 8 is formed by wrapping the rear wheel 8 in an inverted U-shape. The second vehicle body frame 2 and the third vehicle body frame 3 can be retracted and retracted by sliding with the structure shown in FIG. In addition, the saddle, handle and petal crank can be opened and closed with one touch with the stopper.
As shown in FIG. In the mesh pipe shown in claim 5, the ordinary pipe has a hollow inside, but in the mesh pipe, the inside is not hollow but a thin plate reinforced plate processed into a mesh shape to reduce weight and maintain strength. It is made possible.

[0005]

With this configuration, the petal crank gear, the chain, and the rear wheel gear can be disposed on the right and left sides of the inner portion of the rear wheel, so that the rear wheel has a square shape having a diameter equal to the diameter of the rear wheel as shown in FIG. It can be folded down, making it compact and lightweight.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments with reference to the drawings.

In the figure, the state shown in FIG. 1 is changed from the state shown in FIG. 1 to the state shown in FIG. 1 by removing the second body frame 2 and the third body frame 3 from the first body frame with the stopper grips 31 and 32. Slide and store. Next, the stopper of the saddle 20 is removed, and the saddle is rotated downward with the screw pin 19 as a rotation axis to fold the saddle. Then, when the handle 28 is pulled, the stopper 29 is released, and the handle post 15 is folded rearward. Turn the handle 35a to release the stopper 35, and fold the handle downward. Next, the 17-petal crank is removed by sliding the 27-stopper off, and is squeezed to collapse as shown in FIG. 6. The opposite-side petal crank 17 a is removed from the 27-a stopper and folded as shown in FIG. Then, it can be folded into a square shape and put in a bag as shown in FIG.

[0008] Reference numerals 21 and 21a shown in FIG. 8 denote bearings having a ball pressing ring for pressing a bearing ball, and are used to rotatably hold the first vehicle body frame 1 and the petal crank gears 6 and 6a. Bearing 21, 21
a and the petal crank gears 6 and 6a are welded. Petal crank gears 6, 6a are petal cranks 17, 17,
cover pipes 36 and 3 for rotating or sliding a
6a is welded.

FIG. 9 is a cross-sectional view of the rear wheel hub, which is obtained by adding 25 hub shafts shown in the figure to the structure of a normal bicycle rear wheel hub. The left gear 7a and the right gear 7 are fixed by screws. Things. The brake 26 has the same structure as that of a normal bicycle, but has a V-shoe shape to reduce the thickness.

In FIG. 10, two front wheels can be accommodated on both sides inside the rear wheel during storage. 2
The shafts 2 and 22a are arranged on both sides, and are rotatably held by pressure ring type bearings. The tire configuration is a round tire, in which a wire 30 is built inside the tire to prevent the tire from growing, and the air injection port is a stomach rubber valve. The front frame 18 is fixed to the lower part of the head lug 9 by a pressing ring screw, and is fixed by screws.

In FIGS. 11 and 12, the head lug 9 is vertically welded to the tip of the third vehicle body frame 3, and the handle operation is well-balanced by being vertical. A stopper 29 for the handle post 15 is provided inside the head lug.
The stopper 29 is extended and contracted by a spring, and is automatically fixed by the spring when the handle post 15 is in the working state.

In FIG. 13, the stoppers 31 and 32 are such that the pulling mandrel can be finely adjusted by a screw system and the handle can be stopped at the stop position. Numerals 31 and 32 have the same structure on both sides.

FIG. 14 shows a stopper structure of the handle, which can be extended and contracted by a stopper spring of 35 by rotating the handle of 35a. By turning the handle, the stopper comes off and the handle is folded. In the working state, the stopper is implemented by the spring.

In FIG. 15, the stopper is implemented by turning the saddle post 5 with the 19 screw pins as a rotation axis and turning the handle of the stopper 20 downward, and the stopper is released by turning it upward to rotate the saddle post 5 downward. do it,
It can be folded as shown in FIG. Further, 23 screw holes are screw holes of 19 screw pins for adjusting the height of the saddle post 5, and are provided with a plurality of screw holes which are raised from the vehicle body surface. The stopper receiver 20 is screwed and movable, and the handle and the saddle are configured to be adjustable in height.

[0015]

[Effect] With the above configuration, it is possible to fold compactly as shown in FIG. 2, and as it is reduced in weight, it can be put in a bag and portable as shown in FIG. It can be used with. In addition, storage can also be performed on a shelf, in a room, or in a small place such as a locker, and the bicycle need not be parked in a public place.

[Brief description of the drawings]

FIG. 1 is a side view showing a bicycle according to an embodiment of the present invention.

FIG. 2 is a side view of the embodiment of the present invention in a folded state.

FIG. 3 is a plan view showing a main structure of the present invention.

FIG. 4 is a perspective view showing a bicycle according to the embodiment of the present invention.

FIG. 5 is a side view showing a state of being folded and put in a bag according to the present invention.

FIG. 6 is a side view showing a folded state of the right petal crank of the present invention.

FIG. 7 is a side view showing a folded state of the left petal crank of the present invention.

FIG. 8 is a cross-sectional view showing a main structure of the present invention.

FIG. 9 is a cross-sectional view showing a main structure of the present invention.

FIG. 10 is a cross-sectional view showing a main structure of the present invention.

FIG. 11 is a front sectional view showing a main structure of the present invention.

FIG. 12 is a side sectional view of FIG. 11 showing a main structure of the present invention.

FIG. 13 is a state diagram of a stopper of the main body frame of the present invention.

FIG. 14 is a state diagram of a stopper of the handle of the present invention.

FIG. 15 is a stopper state diagram of the saddle of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st body frame 2 2nd body frame 3 3rd body frame 4 Saddle 5 Saddle post 6, 6a Pedal crank gear 7, 7a Rear wheel gear 8 Rear wheel 9 Head lug 10 Chain loosening prevention gear (symmetrical on both sides) 11, 11a Chain 12, 12a Petal 13 Handle 14 Brake handle 15 Handle post 16, 16a Front wheel 17, 17a Petal crank 18 Front frame 19 Rotating screw pin 20 Saddle post stopper (symmetrical on both sides) 21, 21a Bearing 22, 22a Front wheel shaft 23 Screw for rotating screw pin Holes (symmetrical on both sides) 24 Bag chuck 25 Hub shaft 26 Brake 27, 27a Petal crank stopper means 28 Stopper handle 29 Handle post stopper means 30 Tire built-in wire 31 Third vehicle body Lame stopper means 32 Second body frame stopper means 33 Bag 34 Backing of a thin sheet of bag 35 Handle stopper means 35a Handle stopper screw hole or screw rod 36, 36a Petal crank cover pipe

Claims (5)

[Claims] 1. A pedal crank gear for transmitting rotation of a pedal to a rear wheel, a chain, and a rear wheel gear are individually arranged on a right side and a left side of an inner portion of the rear wheel. A configuration in which the left side gear is connected by a shaft and fixed with screws, has an inverted U-shaped first body frame that holds the left gear, and can store the second and third body frames in the first body frame in a sliding manner. Folding bicycle. The front wheel has a size of about half or less of the diameter of the rear wheel, is formed as two wheels on the left and right sides, and is disposed via a bearing, and is vertically welded to the tip of the third body frame. It is arranged on the rear wheel side of the head lug. 2. The folding bicycle according to claim 1, wherein the tire has a rim for holding the tire in a shape of a round tire having a wire built inside a circle. 3. The saddle is folded by turning a screw pin attached to the first vehicle body frame downwardly around a shaft, folding the handle post backward, and then folding the handle by opening and closing the respective stoppers downward. The folding bicycle according to claim 1, which can be used. 4. The folding bicycle according to claim 1, wherein the petal crank can be folded by welding a cover pipe to the petal crank gear and sliding and rotating the petal crank using the cover pipe. 5. The folding bicycle according to claim 1, wherein a mesh pipe is mainly used for forming the structure of the bicycle according to the present invention to reduce weight and maintain strength.