JP2017007403A - Drop handlebar for bicycle - Google Patents

Abstract

TECHNICAL PROBLEM: To provide a drop handlebar for a bicycle, capable of reducing a stress applied to a ring finger, a middle finger or a little finger which holds a handlebar, when the hands hold brake brackets.SOLUTION: A drop handlebar 1 comprises recessed bent parts 6 on surfaces of drop parts 5. As a result, when the hands hold brake brackets 8, parts of fingers are disposed on the recessed bent parts 6, so that a load applied to fingers is applied not in point contact, but in surface contact, so that a stress does not occur on fingers, so that a user can pedal for a long term comfortably.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bicycle drop handle.When the grip position is taken at a brake bracket attached to the drop handle, the load concentrates on the finger hitting the handlebar surface, which causes stress. The present invention relates to a new drop handle that reduces the weight and makes cycling fun.

In the case of a drop handle, the posture during traveling and the position where the drop handle is gripped vary, and the driver usually changes the grip position according to the conditions at that time.

For example, when the vehicle is traveling at a high speed or climbing a steep hill, a forward leaning posture is applied to apply a large force to the pedal (foot), and the grip position at this time is a drop position.

On the other hand, when driving in an urban area, the driver often takes a grip position at the brake bracket and wakes up to travel in an easy posture.

For this reason, in the case of a bicycle with a drop handle, an invention devised so that it can run in a position that suits the individual preference of the driver is introduced in Japanese Patent Laid-Open No. 2014-31065.

This is a shock absorber that is light enough to be suitable for road sports type bicycles and does not cause a feeling of discomfort in the steering wheel, and the shock is mitigated, and extends upward from the front fork 52 that supports the front wheel 51. In the shock absorber 1 attached to the upper end portion of the steering column 54 that swivels together with the front fork 52 with respect to the head tube 53 of the frame, the main stem 3 and the auxiliary stem 4 that extend forward from the steering column 54 side up and down. A handle receiver 5 that supports the handlebar 56 at the front of the main stem 3 and the sub-stem 4 by pivotally supporting the rear part of the main stem 3 and the sub-stem 4 so that the front side swings up and down. The shafts connecting the connecting points on the steering column 54 side and the handle support 5 side of the main stem 3 and the auxiliary stem 4 are parallel and the distance between the connecting points is the same length. So as to the main stem 3 and the sub-stem 4, a configuration in which the front side is swung upward by the buffer spring 14.

However, in the case of this handle, even if the position and angle of the handle can be adjusted, when the vehicle is driven at the position of the brake bracket, the load concentrates on the finger hitting the handlebar surface, resulting in stress.

Japanese Patent Application Laid-Open No. 07-267166 discloses the use of stays 8 at both ends of the handle body 3 in order to increase the force applied to the pedal and reduce fatigue by effectively using the force of the arms 14 and 14. The ends are joined and fixed, and the pads 9 and 9 are supported at the tips of the stays 8. The pads 9 and 9 allow the hands 15 and 15 and the elbows 12 and 12 to be supported by a part of the arms 14 and 14. The contents are designed to keep the part from the outside.

However, even in the case of the present invention, even if there is an effect of not feeling tired in the position of the riding posture or the form, as in the above-described example, the ring finger that hits the handlebar when the grip position is taken at the brake bracket. Or the middle or little finger hurts.

As described above, in the case of the drop handle, when the position is taken at the brake bracket portion, the handle bar is strongly gripped by the little finger, the ring finger, and the middle finger, so that a large stress is generated on the finger.

The problem is that the handlebar is usually a hollow body such as carbon or aluminum, the cross section is substantially circular, the diameter is about 23 mm to 24 mm, and the handlebar is relatively thick with the little finger and ring finger, or the ring finger and middle finger. This is due to a strong grip.

In order to reduce the occurrence of such a problem, a tape is usually wound around the handlebar, but stress is generated even when the tape is wound.

The present invention has been proposed for the purpose of solving such a problem, and in the drop handle, a novel drop handle that reduces the stress received from the handle bar when traveling with the brake blanket portion positioned. Is the purpose.

In order to achieve the above object, the invention described in claim 1 is directed to the drop handle, when the position of the handle bar of the drop handle is at the position of the brake bracket. The concave portion is formed on the surface of the drop portion so that a part of the finger can be accommodated, and the stress applied to the finger is reduced by the action of the concave portion.

According to a second aspect of the present invention, in the bicycle drop handle according to the first aspect, in the handle bar of the drop handle, an auxiliary concave curved portion is formed on the back surface of the concave curved portion. , Is characterized by.

According to a third aspect of the present invention, there is provided the bicycle drop handle according to the first or second aspect, wherein a tape is wound around the drop handle as a whole.

In the handlebar of the drop handle according to the present invention, a concave bent portion is formed on the surface of the handlebar where the little finger, the ring finger or the middle finger hits when the brake bracket is positioned on the handlebar of the drop handle. As a result, the contact with the bar becomes a surface contact, and as a result, the stress received by the finger is greatly reduced.

Explanatory drawing of a drop handle. Explanatory drawing of the state which has taken the position in the brake bracket, putting a little finger and a ring finger on a concave part. In FIG. 2, the explanatory view which looked at the state which has applied an index finger on the brake lever and is performing brake operation from the inside. Explanatory drawing of the state which has taken the position in the brake bracket, putting a ring finger and a middle finger on a concave part. Explanatory drawing of the state which looked at FIG. 4 from the inner side. In this invention, explanatory drawing of the state which put the little finger and the ring finger on the concave curved part of the handlebar. Explanatory drawing which shows the relationship between the conventional handlebar without a curved part, a little finger, and a ring finger.

The drop handle according to the present invention will be described in detail with reference to FIGS.

In FIG. 1, 1 is the entire drop handle, 2 is a horizontal part extending from the stem clamp part 1b to the left and right, 3 is a handlebar, 4 is a circular part with the horizontal part 2 facing forward, and 5 is the circle. It is a drop part in which the tip of the music part 4 is bent downward.

Although there are various forms of the article called the drop handle 1, the present invention can be applied to all of these drop handles. 6 is a concave curved portion formed on the back side (front side) of the drop portion 5 on the back side of the brake lever 9 of the brake bracket 8, and the little finger gripped when taking a position on the brake blanket 8, The ring finger or the middle finger just touches the concave curved portion 6 and comes into contact with the surface of the handlebar 3 in a surface. In addition, the hollow of the concave curved part 6 is a gentle concave curve.

FIGS. 2 and 3 show a state where the vehicle is running at the position of the brake bracket 8. At this grip, the ring finger rests on the concave curved portion 6 formed on the handle bar 3.

4 and 5 show the case where the position is taken at the position of the brake bracket 8 in the same manner, but the middle finger is applied to the concave curved portion 6 at the time of this grip.

FIG. 6 is an explanatory view of a state in which a concave bent portion 6 is formed on the handlebar 3 and a finger is placed on the handlebar 3 in the present invention, and the finger is placed in a gently concave curved surface 6 and in a surface contact state. There is almost no stress.

On the other hand, FIG. 7 shows a conventional grip state. In this state, the contact with the finger on the surface of the handlebar 3 is a point contact (P), and the stress applied to the finger is concentrated on the point contact P portion. , Great stress occurs.

In particular, when the brake bracket 8 is positioned, the handlebar 3 is strongly held with a finger for brake operation or the like, and therefore stress is constantly applied.

The shape of the concave curved portion 6 formed on the handle bar 3 is required to be in a range that does not impair the strength of the handle bar 3, and if it is too large, the strength of the handle bar 3 may be impaired and dangerous. It is desirable that the finger surface has a minimum area where the finger surface touches with a flat surface.

Further, as with the concave curved portion 6, the handle bar 3 is gripped by forming an auxiliary concave curved portion 6 'on the opposite side of the concave curved portion 6 (the back side of the handle bar 3) in FIG. In this case, the finger placed on the back side of the handlebar 3 may be formed so that no stress is generated.

In addition, when the brake bracket 8 is positioned, the middle finger, the ring finger, and the little finger may be gripped by being positioned between the handle bar 3 and the brake lever 9, but at this time, the outside of the little finger is concavely bent. Fits in part 6.

1 Drop handle 2 Horizontal part 3 Handlebar 4 Forward curved part 5 Drop part 6 Concave part 7 Drop 8 Brake bracket 9 Brake lever

Claims (3)

In the handlebar of the drop handle, when taking a position in the brake bracket part, on the back side of the brake lever of this brake bracket, on the surface of the drop part, a concave bent part that fits a part of the finger is formed, A bicycle drop handle constructed so as to reduce the stress applied to the finger by the action of the concave curved portion. 2. The bicycle drop handle according to claim 1, wherein in the handle bar of the drop handle, an auxiliary concave curved portion is formed on a surface on the back side of the concave curved portion. The bicycle drop handle according to claim 1 or 2, wherein a tape is wound around the drop handle.

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