KR20150118513A

KR20150118513A - Crank arm of bicycle pedal

Info

Publication number: KR20150118513A
Application number: KR1020140085063A
Authority: KR
Inventors: 심원보
Original assignee: 심원보
Priority date: 2014-04-14
Filing date: 2014-07-08
Publication date: 2015-10-22

Abstract

The length of the crank arm of the bicycle pedal that utilizes the leverage of the lever is longer than that of the current bicycle, so that the crank arm can be used more powerfully by connecting it three times up and down three times. You can pedal in the same height, width and size as before

Description

Crank arm of bicycle pedal {omitted}

The present invention relates to a bicycle pedal for extending a crank arm of a bicycle pedal to lightly rotate the bicycle by the principle of a lever. More specifically, the principle of the lever is applied three times, and two lengths of the crank arm are freely, Or longer, the turning radius of the pedaling is the same as the turning radius of the conventional bicycle, so that the bicycle pedal can be lightly pedaled without a sense of resistance.

The word "pedaling" is used here to refer to the most appropriate height and radius of rotation for a bicycle that will most effectively rotate two pedals with two feet.

The bicycle consists of a driving part which moves the pedal by the human's hair, moves the rear wheel by the chain and rotates, and moves by the pure manpower which adjusts the direction by the handle.

1, a first sprocket 4 connected to a crank arm 7 of both pedals 5 is rotated by a pair of legs sitting on a saddle 1 provided on a bicycle frame 2, And the second sprocket 6 of the rear wheel 3 is rotated by the handle 10 connected to the front wheel 11 so as to be rotated and advanced by the handle 10. The center rotary shaft of the pedal 5 and the second sprocket 6, The horizontal dashed line connecting the center of (6) is denoted by A, B, which indicate the height indicated by the double arrows so that the height of each other can be seen. This is also the height suitable for pedaling the existing bicycle.

The crank arm 7 of the pedal 5, which is most important here, utilizes the principle of the leverage. The longer the longer the longer the bicycle is, the more it rotates and advances. And the position and height of the rotary ring of the pedal (5) and the radius of rotation.

This purely bridged ring with the power of legs makes long-distance bicycle travel a difficult problem for anyone.

In order to solve such a problem, the technique described in Patent Document No. 10-0432123 shown in FIG. 2 has been developed. The technical feature of the present invention is that although the pedal connecting rod 320 is pulled and extended to utilize the role of the lever more, If it is out of the range of the pedal rotation ring, it will be adversely affected and it is difficult to use it.

3, the length of the crank arm 570 remains unchanged, and the second driving unit 600 is attached to the rotating shaft of the pedal 660 to swing back and forth like a swing There is no technique to lightly pedal the weight of the bicycle by using a long lever because of the technology that reduces the position of the rotary ring and gives a sense of stability.

If the length of the crank arm (570) is made longer, it will adversely affect the rotation ring and equally impossible.

In FIGS. 2 and 3, if the pedal connecting rod 320 is extended, the range of the rotating ring of the conventional pedal, that is, the range in which the pedal can be rotated most easily when the pedal is rotated by two feet is out of range, can.

There is a problem with the above-mentioned problem that the pedal lightly rings in the range of the existing bicycle rotation ring.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a crank arm having a length of three times longer than a crank arm connected to a pedal, Even if it is applied by both sides, it does not go out of the range of the existing pedal rotation ring, but it gains maximum power with less force, and it is to advance by turning the bicycle lightly.

In the lower V-shape of the crank arm, the position of the pedal is formed at the position of the pedal of the existing bicycle, so that it is the same height and rotation as the existing bicycle and equally installed on both sides of the V- The crank arm is easy to disassemble and assemble and can be used for connecting short or long lengths of both crank arms by fastening bolts and bolts. The top of the crank arm is formed with a V-shape, and a first sprocket And a crank arm of a bicycle pedal in which a working hole for connecting the rotary shaft fastening hole and the first sprocket is formed. .

According to the present invention having the above-described configuration, the length of the crank arm on which the pedal is installed is made long, and both sides are used to extend the length of the crank arm three times. When the pedal is rotated, the crank arm is long, Is a light rotating ring, and the position of the pedal is located on the existing bicycle position, anyone can easily use the bicycle.

1 is a perspective view of a conventional bicycle.
2 is an assembled perspective view of a conventional improved multifunction bicycle drive.
3 is a state diagram showing the operation state of a conventional improved bicycle pedal.
4 is a perspective view of a crank arm and a pedal according to the present invention.
5 is an operational view of a crank arm and a pedal according to the present invention.
6 is a perspective view of a crank arm according to the present invention in which the length of the crank arm can be adjusted.
7 is an exploded view of the crank arm of Fig.
Fig. 8 is a view showing the operation state of the crank arm and the pedal as a synthesis of the present invention.

The preferred embodiments will be described in detail with reference to the accompanying drawings.

The same reference numerals are used for the same components in the drawings, and redundant descriptions are omitted for the same components.

It is to be understood that the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

FIG. 4 is a perspective view of a crank arm and a pedal according to the present invention, FIG. 5 is an operating state view of a crank arm and a pedal according to the present invention, FIG. 6 is a perspective view of a crank arm according to the present invention, 7 is an exploded view of the crank arm of Fig. Fig. 8 is a view showing the operation state of the crank arm and the pedal as a synthesis of the present invention.

The present invention relates to a crank arm (7) of a bicycle pedal and also a portion of a pedal (5) to which the invention is attached, as shown in Figure 4, by rotating both pedals (5) The second sprocket (6) of the rear wheel (3) was rotated by the chain (8) and the bicycle advances.

As shown in Fig. 1, the height of the pedal 5 is basically the same as the horizontal dotted line of the height (A) and (B) on the ground (G).

You can see that there is a lot of room under the pedal (5) with the ground (G)

The present invention was invented under the consideration that there is a space with the ground (G) under the pedal (5).

4 shows a state in which the first sprocket 4 fixed to the frame 2 can be increased by providing a space G between the pedestal 5 and the frame 2, To show the height (B) side is slightly raised to illustrate,

The length of the crank arm 7 of the pedal 5 is set to be longer and the lower V-

Here, the meaning of the word V-shaped is that the amount of force that can be obtained by bending to the right, left, front, etc., is similar to that of B-type, C-type, It is collectively referred to as a V-shaped form, and in the following explanation, the same description will also be referred to as a V-shaped form,

Then, the pedal (5) is located at the position of the existing bicycle pedal (5), so that it can be pedaled like the existing bicycle.

When installed in this way, the effect of the lever can be seen longer than the existing crank arm (7), so that the driver can reduce the force when the pedal (5) is ringed.

Here, the further elongated crank arm 7 becomes easier to pedal 5 at an angle of the pedal 5, which is installed at the folded length in the lower V-shape 30 ,

I can not tell you exactly how many angles it depends on the characteristics of the bike.

The force of the leverage is more likely to be used as the deviation length K between the existing pedaling line F and the elongated crank arm length H in contrast to the state diagram showing the operating state of the pedal 5 ring of Fig. It is possible to identify the number by the deviation length (K).

The arrow indicates the direction of rotation of the pedal (5).

As the length of crank arm (7) is longer on both sides, it is easier to pedal than existing bike.

Fig. 6 shows that the both sides of the V-shape 31 on the lower side where the crank arm 7 is decomposed can be further freely elongated and shortened,

In order to use the longer length of the crank arm 7 above the crank arm 7, the length of the crank arm 7 is extended by the upper V-shape 32 so that the pedal 5 6, which is developed to aid the ring,

Described with reference to the exploded view of Fig.

The coupling thread 51 connected to the pedal shaft 50 of the pedal 5 of the lower V-shaped 31 to be disassembled is fastened to the coupling hole 52 of the single shaft of the crank arm 7, Because the two sides are the same, we use the same code and the explanation is one side,

Insert the bolt fixing hole 23 into the fastening hole 24 by a required depth and then insert the bolt 21 along the dotted line to fix the bolt fixing hole 22 with a finger to fix it.

You can always modify it as needed.

The work hole 33 is formed in the upper V shape 32 and the working hole 33 is formed in the work hole 33 for assembling the bolt when the rotary shaft fastening hole 9 is connected to the center of the first sprocket 4 The rotary shaft fastening hole (9) can be connected to the center of the first sprocket (4) to be assembled to a bicycle for children or an adult bicycle.

FIG. 8 is a view showing the operation state of the crank arm and the pedal as a result of the present invention, and the length of the lower V-shape 31 of the crank arm 7, which is extended as compared with the conventional pedaling line F The force of the levers is increased by the length of the crank arm 7 extended to the deviation length K and KK of the two lengths of the crank arm 7 extended to the upper V- It can be confirmed that the number is the deviation length (K) and (KK).

By extending the length of the crank arm (7), it is now easier to pedal even on slopes and on flat ground.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

The present invention relates to a crank arm of a bicycle pedal. More particularly, the present invention relates to a crank arm of a bicycle pedal having a long, short, triple structure, You can use all bikes if you change them.

1: Saddle 2: Frame
3: Rear wheel 4: 1st sprocket
5: pedal 6: second sprocket
7: crank arm 8: chain
9: Rotary shaft fastening hole 10: Handle
11: Front wheel 22. 23 .: Bolt fixing hole
24. 52. Fasteners 21. Bolt
30: Lower V shape 31: Lower V shape
32: Upper V shape 33: Operation hole
50: pedal shaft 51: connecting thread
AB: Height G: Floor
F: Conventional pedaling line H: Length of elongated crank arm
K. KK: deviation length

Claims

And the pedal 5 is positioned at the pedal position of the existing bicycle in the lower V-shape 30 of the crank arm 7 and is pedaled at the same height and rotation as the conventional bicycle (30), and the crank arm (7) of the bicycle pedal.

The method according to claim 1,
The bolt 21 and the bolt fixing holes 22 and 23 of the crank arm 7 and the lower V-shaped portion 31 of the crank arm 7, which are equally installed on both sides thereof, The bicycle pedal of the crank arm (7) of the lower V-shaped (31), which can be used to connect a short or long length of the length of the bicycle (7).

The method according to claim 1,
An upper V-shape 32 on the upper side of the crank arm 7 and a rotary shaft fastening hole 9 connecting the first sprocket 4 and the rotary shaft fastening hole 9 and the first sprocket 4 (32) of the crank arm (7) on the upper side where the working hole (33) for connecting the crank arm (7) is formed.