JPH0715837Y2 - Bicycle gear shift operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a gear shift operating device mounted on a handlebar of a bicycle, and more particularly to a gear shift operating device for a bicycle having an operating lever having two operating portions.

(Prior Art) Conventionally, a gear shift operation device provided with an operation lever having two operation parts is already known as seen in Japanese Utility Model Publication No. 62-38878.

This conventional gear shift operating device has a fixing member having a fitting portion that fits near a grip portion of a handlebar of a bicycle.
A lever shaft extending in a direction orthogonal to the axial center of the fitting portion is provided, and a boss portion pivotally supported by the lever shaft and first and second operation portions projecting bifurcated from the boss portion are provided. The operation lever is pivotally supported on the lever shaft so that the respective operation parts are located on both sides of the handlebar, and the operation part is horizontally pushed by the thumb of the hand holding the handlebar,
The forefinger is configured to push the second operation portion in the horizontal direction.

(Problems to be solved by the invention) However, in the conventional one, the operation lever is supported on the lever shaft orthogonal to the axis of the grip portion of the handlebar, and the operation portion of the operation lever is connected to the grip portion. On the other hand, since it is arranged to displace in a direction traversing the axis of the gripping portion to change gears, when used with a derailleur having a large number of gear shift stages,
Each of the operation sections is greatly moved away from the grip in the lateral direction, and as a result, there is a problem that it becomes difficult to operate the operation sections with the fingers of the hand holding the grip. Further, the chain guide of the derailleur, which is operated via the operation wire by operating the operation lever, is always urged in one direction by a return spring, and is rotated in a direction opposite to the operation direction of the return spring. Narume,
It was even more difficult to operate with the index finger, which cannot output a greater force than the thumb.

The present invention has been devised in view of the above-mentioned conventional problems, and an object thereof is a structure for shifting gears by using an operation lever having two operation parts, and a hand holding the gripping part, The two operating parts can be easily operated by performing a sliding motion about the axis of the grip part.

(Means for Solving the Problem) Therefore, the present invention provides a fixing member (1) having a fitting portion (11) that fits near a grip portion of a handlebar of a bicycle, and the fixing member (1). And an operating lever (2) having a boss portion (21) for rotatably supporting an axis in a direction substantially the same as the axis of the grip portion of the handlebar. The operation lever (2) A first operating part (22) extending radially outward from one side of the boss part (21) with respect to the rotation center line, and the first operating part from the other side of the boss part (21) with respect to the rotation center line. (22) is provided with a second operating portion (23) extending outward in the radial direction in the opposite direction, and the operating lever (2) is held by the holding portion of the handlebar, It can be operated by moving around the axis of the grip.

(Operation) After making the operation lever (2) rotatable about an axis substantially in the same direction as the axis of the handlebar grip portion, the operation lever (2) is held by the handlebar. Since it can be operated by the movement of the hand holding the gripping part around the axis of the gripping part, the hand holding the gripping part of the handlebar can be moved to one side in the circumferential direction in the gripped state. Since it is possible to operate the first and second operation parts (22) (23) by shifting to the other side, even when using with a derailleur having many gear positions, the fingers of the hand that are grasped, It can be easily operated without forcibly extending the grip portion.

(Example) In the drawings, (1) is a substantially C-shaped fitting portion (11) fitted near the grip portion (h) of the handlebar (H) of the bicycle as shown in FIGS. It is a holding member that has
Reference numeral (2) is an operation lever pivotally supported on the fixing member (1) via a lever shaft (3).

Therefore, in the illustrated embodiment, a plate protruding outward in the radial direction of the fitting portion (11) as shown in FIG. 3 is provided on one side of the fitting portion (11) of the fixing member (1). -Shaped lever support portion (12) is provided, and in the lever support portion (12), the center line (X) of the fitting portion (11), in other words, in the same direction as the axis of the grip portion (h). A lever shaft (3) extending to the boss, a boss portion (21) for pivotally supporting the operation lever (2) on the lever shaft (3), and a boss portion (21).
A boss portion (21) pivotally supported by the lever shaft (3) and a first operating portion (22) extending from the boss portion (21) toward the fitting portion (11), in other words, a boss portion (21). A first operation portion (22) extending radially outward with respect to the rotation center line, a second operation portion (23) extending in a direction opposite to the fitting portion (11), in other words, a rotation center of the boss portion (21). A second operating portion (23) extending radially outward from the other side of the wire in the opposite direction to the first operating portion (22), and the boss portion (2
1) was pivotally supported on the lever shaft (3).

Further, in the illustrated embodiment, the second operating portion (23) is inclined upward with respect to the first operating portion (22), and the second operating portion (23) is attached to the handlebar (H). The finger insertion side operation surface (23a) for inserting the thumb (U) of the hand holding the grip portion (h) is twisted so as to be located above the opposite side operation surface (23b). Also, the second operation section (23)
Is displaced toward the finger pointing side with respect to the first operation portion (22) as shown in FIG.

Also, the lever shaft (3) in the embodiment is formed separately from the fixing member (1) as shown in FIG. 7, and is fixed to the supporting portion (12) by tightening the mounting screw (4). Meanwhile, a plurality of fitting projections (3
1) is provided at predetermined intervals in the circumferential direction, and the support portion (12) is provided with a plurality of fitting holes (13) that engage with the fitting protrusions (31), By adjusting the engagement position of the fitting protrusion (31) with the fitting hole (13), the position of each of the operation portions (22) and (23) with respect to the fixing member (1) and further to the handlebar (H) is adjusted. I am able to do it.

A ring-shaped positioning body (5) having a plurality of engaging portions (51a) is provided inside the boss portion (21) of the operation lever (2).
1), an engaging body (52) that selectively engages with one of the engaging portions (51a), and a plate-shaped pressing spring that presses the engaging body (52) toward the engaging portion (51a). A positioning mechanism (5) composed of (53), a friction body (6) arranged on the outside of the positioning body (51) in the radial direction and supported by the boss portion (21), and the engagement body (52). A switching body (7) is provided which is displaced in the radial direction of the positioning body (51) and is engaged with one of the engagement portion (51a) and the friction portion (6a) of the friction body (6). .

In the figure, (8) is a cover body that is attached to the tip of the lever shaft (3) to conceal the positioning mechanism (5) and the like.
(9) is a holding body that holds the engaging body (52) movably in the radial direction of the positioning body (51), and (10) is provided between the lever shaft (3) and the positioning body (51). Is an auxiliary spring for urging the positioning body (51) in a direction opposite to the acting direction of the return spring in the derailleur.

The present invention is configured as described above. For example, as shown in FIGS. 1 and 2, the grip portion of the handlebar (H) at the position near the attachment portion of the handlebar (H) to the handle stem (S) of the bicycle ( Since the lever shaft (3) is mounted inwardly of the handlebar (H) and the first operating portion (22) is located nearer to the handlebar (H) near h). is there. This mounting is performed by the fitting part (11) of the fixing member (1).
Is fitted into the handlebar (H) and the tightening screw (20) is tightened.

Then, the operation lever (2) pivotally supported by the lever shaft (3) is orthogonal to the center line (X) of the fitting portion (11), in other words, in the grip portion (h). Since it can be rotated in a direction orthogonal to the axis, the thumb (U) of the hand holding the gripping part (h) of the handlebar (H) is extended to the side, and the gripping part (h ), The first operating portion (22) can be operated by shifting it toward one side in the circumferential direction (direction of arrow A in FIG. 1) while gripping (), and the gripping portion (() of the handlebar (H) ( By extending the thumb (U) of the hand holding h) to the side and shifting the grip (h) to the other side in the circumferential direction (direction of arrow B in FIG. 1) while holding the grip (h). Since the 2 operation part (22) can be operated, even if it is used with a derailleur with a large number of gear shift positions, the fingers of the grasped hand can be forcibly extended. It can be easily operated without or.

In addition, the second operation section (23) in the embodiment is inclined upward with respect to the first operation section (22), and is located between the second operation section (23) and the first operation section (22). Since the distance between the operating parts (22) is short, the thumb of the hand holding the gripping part (h) and the operating part (22) ) (23) is pushed, the operation can be easily performed.
Since the operating portion (23) is twisted so that the finger-outlet side operation surface (23a) for ejecting the thumb (U) is located above the opposite operation surface (23b), the grip portion When pushing the second operation part (23) with the thumb of the hand holding the gripping part (h) without shifting the hand holding (h) as described above, the thumb (U) is It is hard to slip to the finger pointing side. Therefore, the operation of the second operation section (23) by the thumb (U) can be performed more easily. Further, since the second operation section (23) is displaced toward the finger pointing side with respect to the first operation section (22), the second operation section (2) is moved by the thumb (U).
When 3) is pushed as described above, it is displaced toward the finger pointing side with respect to the second operation portion (22) of the thumb at the maximum operation position side, so that the second operation portion ( It is possible to secure a sufficiently large amount of contact with 23).

As shown in FIGS. 1 and 2, the gear shift operating device of the present invention is mounted near the grip portion (h) at a position near the handlebar (H) attached to the handle stem (S) and the handlebar. It may be mounted near the grip portion on the free end side of the bar (H).

(Effects of the Invention) As described above, according to the present invention, the operation lever (2) is rotatable about an axis substantially in the same direction as the axis of the grip portion of the handlebar. Since (2) can be operated by the movement of the hand holding the grip portion of the handlebar about the axis of the grip portion, the hand holding the grip portion of the handlebar can be operated. , It is possible to operate the first and second operation parts (22) (23) by shifting to one side and the other side in the circumferential direction while gripping, so when using with a derailleur with many gear positions. Even if there is, it is possible to easily operate the fingers of the grasped hand without extending the operating lever in the operating direction.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment in which the device of the present invention is attached to a handlebar of a bicycle, FIG. 2 is an enlarged plan view of the same, and FIG. Fourth
The figure is an explanatory view of a state in which the operation lever is operated, FIG. 5 is a plan view of only the operation lever, FIG. 6 is a sectional view taken along line VI-VI of FIG.
FIG. 7 is a partially omitted enlarged cross-sectional view. (1) …… Fixing member (11) …… Mating part (2) …… Operating lever (21) …… Boss part (22) …… First operating part (23) …… Second operating part (3) ...... Lever shaft

Claims (1)

[Scope of utility model registration request] 1. A fixing member (1) having a fitting portion (11) for fitting near a grip portion of a handlebar of a bicycle, and the fixing member (1) in the grip portion of the handlebar. An operation lever (2) having a boss portion (21) rotatably supported about an axis in substantially the same direction as the axis is provided, and the operation lever (2) rotates the boss portion (21). A first operation portion (22) extending radially outward from one side with respect to the center line;
A second operating portion (23) extending radially outward from the other side of the boss portion (21) with respect to the rotation center line in a direction opposite to the first operating portion (22) is provided, and the operating lever (2 )
Is operable by a movement of a hand holding the grip portion of the handlebar about an axis of the grip portion.