JPS6220396Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to bicycle pedals.

Usually, this type of pedal is configured such that a tread surface is provided on the surface of a pedal body supported on a pedal shaft, and the crank is rotated by placing the driver's foot on the tread surface and depressing the pedal.

By the way, when transmitting depressing force to the pedal body, if the tarsal bone is brought into contact with the tread surface, a very large depressing force can be transmitted to the pedal body over a long period of time with less fatigue. This makes it difficult to perform up-and-down movements centering on the ankle joint at the base of the fingers, and the operability when pedaling becomes poor, resulting in the inability to rotate the pedals at high speeds when riding a bicycle at high speeds.

Therefore, in general, the foot is placed so that the part from the phalanx side of the metatarsal bone to the phalange is in contact with the tread surface, an arch is formed between the ankle joint and the phalangeal joint at the base of the finger, and the foot is placed in contact with the tread surface. However, conventional pedals, as described in Japanese Utility Model Publication No. 56-3261, have two pedals parallel to the pedal shaft, front and rear across the pedal shaft. Since it has a narrow front tread and a narrow rear tread, when the base of the big toe of the foot that steps on the crank side of the front tread comes into contact with the tread, the base of the little toe will touch the front tread. The finger tip side shifts backward without making contact with the pedal body, so when the pedal body is transmitting the pedal force from the pedal body, it cannot be transmitted from the entire area between the big toe and the little toe, As a result, not only did the foot become easily fatigued, but it was also unable to transmit a large amount of force.

The present invention was devised in view of the above points, and when the base of the big toe of the foot that is stepping is brought into contact with the tread, the base of the little finger is always brought into contact with the tread, so that the tread force is transferred from the big toe to the tread. This allows the force to be transmitted from the entire area between the little toes, reducing the fatigue of the stepping foot and transmitting a large stepping force.
A pedal body is supported on a pedal shaft having a shaft portion for attaching to a crank arm at a base end, and the pedal is attached to a surface of the pedal body near the axis of the pedal shaft and at a position on the base end side of the pedal shaft. A first tread portion extending in the axial direction of the shaft and the longitudinal direction of the pedal body and having a tread surface having a predetermined area is provided, and the first tread portion is located rearward of the first tread portion and is offset toward the tip side of the pedal shaft. , a second tread portion having a tread surface having a predetermined area and extending in the axial direction of the pedal shaft and the front-rear direction of the pedal body is provided on a surface at a position isolated from the first tread portion. That is.

Embodiments of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a fixed cylinder that is screwed onto the tip of a bicycle crank arm (K), and reference numeral 2 denotes a pedal shaft that is rotatably supported by the fixed cylinder 1.
A pedal body 3 is supported on the pedal shaft 2. The pedal shaft 2 has a mounting portion 21 that is attached to the fixed cylinder 1 and a support portion 2 that extends axially outward from one end of the mounting portion 21 and supports the body 3.
The mounting portion 21 has a screw 23 on its outer periphery and a ball bearing surface 11 on the inner surface of the fixed barrel 1.
and an opposing ball bearing surface 24.

The pedal body 3 also includes a first body piece 31 parallel to the axis of the pedal shaft 2 and having a fitting hole 37 that fits into the support part 22, and this body piece 3.
second and third body pieces 32 and 33 that are parallel to the body piece 31 and arranged on both sides of the body part 1, and a fourth body piece that is arranged between the first and second body pieces 31 and 32. The first body piece 31 is formed by a piece 34 and fifth and sixth body pieces 35 and 36 that connect both ends of the first to fourth body pieces 31 to 34 in the longitudinal direction. By attachment to the support portion 22, the second and fourth body pieces 32, 34 are positioned on the front side with respect to the pedal shaft 2, and the third body piece 33 is positioned on the rear side.

However, on the surface of the pedal body 3 of the lever near the axis of the pedal shaft 2 and at the base end side position of the pedal shaft 2 (the surface of the fifth body piece 35), in the axial direction of the pedal shaft 2 and the A first tread portion 4 is provided which extends in the front-rear direction of the pedal body 3 and has a tread surface having a predetermined area, and is located at the rear of the first tread portion 4 and is offset toward the tip side of the pedal shaft;
A surface (sixth
extending in the axial direction of the pedal shaft 2 and in the front-rear direction of the pedal body 3,
A second tread 5 having a tread surface with a predetermined area is provided so that when the base a of the thumb is brought into contact with the first tread 4, the base b of the little finger is brought into contact with the second tread 5. Do it so that you can get it.

Incidentally, the first and second tread portions 4 and 5 are provided with a large number of anti-slip protrusions 41 and 51. These anti-slip protrusions 41, 51 are formed, for example, by tooth-like protrusions extending in the same direction as the axis of the pedal shaft 2, but they may also be formed in the shape of a mountain. Any shape may be used as long as it can prevent the feet from slipping when the feet are placed on the first and second tread parts 4 and 5.

Further, the height of each of the anti-slip protrusions 41 and 51 is made slightly lower than the surface around the first and second tread parts 4 and 5. By doing this,
When the stepping load acting on the first and second tread parts 4 and 5 is small, the foot stepping on the non-slip protrusion 4
1, 51, and prevent slippery protrusions 4.
1, 51 can be eliminated and fatigue can be reduced, and the first and second tread parts 4,
When the stepping load acting on 5 is large, the stepping force causes the foot to press against the anti-slip protrusions 41, 5.
1 has the advantage of preventing your feet from slipping. Note that the illustrated pedal body 3 includes the third
An auxiliary stepping body 6 extending rearward from the body piece 33 is integrally formed, and an auxiliary stepping surface 7 is provided on the upper surface of the auxiliary stepping body 6, with which the metatarsal bone c on the little finger side of the foot to be stepped on comes into contact. Further, this auxiliary tread surface 7 is provided with a non-slip protrusion 71 similar to the above-mentioned non-slip protrusions 41 and 51. Further, the auxiliary pedal body 6 may be formed integrally with the pedal body 3 or may be formed separately.

In addition, 8 in the figure is a ball pusher screwed into the screw 23 portion of the pedal shaft 2, and ball receiving surfaces 81, 1 are provided on the outer peripheral surface of the ball pusher 8 and the inner peripheral surface of the fixed cylinder 1.
2 and between the ball bearing surfaces 11 and 24, respectively, and the pedal shaft 2 is fixed to the fixed cylinder 1.
It supports free rotation. Also, 10 is a lock nut.

The present invention is constructed as described above, and when the base a of the big toe of the foot to be stepped on comes into contact with the first tread 4, the base b of the little toe is brought into contact with the second tread 5.
With the base a of the thumb and the base b of the little finger in contact with the first and second pedals 4 and 5, depress the pedal body 3, rotate the crank, and ride the bicycle. Let it happen. At this time, an arch is created by the metatarsals c and tarsals f that connect the ankle joint d and the phalangeal joint e at the base of the finger, and the stepping force is transferred from the base of the thumb b and the base of the little finger b. Since the force can be transmitted to the first and second tread parts 4 and 5, foot fatigue can be reduced and a large tread force can be transmitted. or,
The arch formed between the ankle joint d and the phalangeal joint e is made smaller, and the part of the metatarsal c on the tarsal bone f side is brought into contact with the auxiliary tread surface 7 located at the rear position of the second tread portion 5, The stepping force can be transmitted from the metatarsal c to the auxiliary tread 7, and at the same time from the base a of the thumb and the base b of the little finger to the first and second tread parts 4 and 5. The burden on the arch formed by the tarsal bone f can be reduced, and even greater stepping force can be transmitted.

As described above, the present invention supports a pedal body on a pedal shaft having a shaft for attaching to a crank arm at its base end, and supports the pedal body near the axis of the pedal shaft and on the base end side of the pedal shaft. A first tread part is provided on the surface of the pedal shaft, the first tread part extending in the axial direction of the pedal shaft and the longitudinal direction of the pedal body, and having a tread surface having a predetermined area. a second tread having a predetermined area, extending in the axial direction of the pedal shaft and the front-rear direction of the pedal body, on the surface of the pedal at a position isolated from the first tread portion;
When a tread is provided and the base of the big toe of the foot to be stepped is in contact with the first tread, the base of the little finger must be in contact with the second tread, and the stepping force is applied to the whole area between the big toe and the little finger. By transmitting the force from the ground, it is possible to reduce the fatigue of the foot when stepping on the pedal, and also to transmit a large force on the pedal.

Furthermore, when the pedal force is transmitted from the base of the thumb and the base of the little finger to the pedal body, the pedal body can transmit the force in a well-balanced manner without rotating relative to the pedal shaft.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the pedal of the present invention, Fig. 2 is a sectional view taken along the line shown in Fig. 1, Fig. 3 is a sectional view taken along the line taken in Fig. 1, and Fig. 4 is a sectional view taken along the line taken in Fig. 1. It is a diagram. 2...Pedal shaft, 3...Pedal body, 4...
First tread portion, 5... Second tread portion, 41, 51... Anti-slip projection, 7... Auxiliary tread surface.

Claims (1)

[Claims for Utility Model Registration] (1) A pedal body is supported on a pedal shaft having a shaft portion for attaching to a crank arm at its base end, and the pedal body is located near the axis of the pedal shaft, and
A first tread portion extending in the axial direction of the pedal shaft and in the front-rear direction of the pedal body and having a tread surface having a predetermined area is provided on the surface of the base end side of the pedal shaft; A surface having a predetermined size and extending in the axial direction of the pedal shaft and the front-rear direction of the pedal body is provided on a surface of the rear portion and at a position offset to the tip side of the pedal shaft and isolated from the first pedal part. A bicycle pedal characterized in that a second tread portion having a tread surface is provided. (2) The bicycle pedal according to claim 1, which is a registered utility model, characterized in that the first and second tread parts are provided with a large number of anti-slip protrusions. (3) Utility model registration claim 1, characterized in that the height of the protrusion provided on the first and second treads is slightly lower than the surface around the first and second treads. Bicycle pedals listed.