JPH05319355A - Speed change operation device for bicycle - Google Patents

Abstract

PURPOSE:To provide a speed change operation device for bicycle provided with two speed change levers for winding and rewinding a speed change wire, which can be operated easily and accurately and which can be operated under the condition that a handle is gripped strongly. CONSTITUTION:A forefinger of a hand, which is gripping a grip G of a handle bar H, works to a first speed change lever 4 to oscillate the speed change lever 4 toward a second speed change lever 7 and operate the winding of a speed change wire 01. A thumb of the hand, which is gripping the grip G of the handle bar H, works to the second speed change lever 7 to oscillate the second speed change lever 7 toward the, first speed change lever 4 and operate the rewinding of the speed change wire 01.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing member that is connected to a handlebar for a bicycle and rotatably supports a winding body of a speed change wire. The fixing body is interlocked with the winding body via a one-way mechanism. A first speed change lever that is capable of rotating the winding body to the winding side and automatically returning from the winding position to the original position. Positioning the winding body stepwise according to the winding length of the speed change wire. A position holding mechanism for holding, and a second speed change operation tool capable of rotating the winding body to the rewinding side and automatically returning from the rewinding position to the original position by releasing the position holding by the position holding mechanism. The present invention relates to a bicycle gear shift operation device.

[0002]

2. Description of the Related Art The above-described gear shift operating device for a bicycle shifts the gear shift lever even when the first gear shift lever and the second gear shift operating tool are returned to their original positions each time they are manipulated and gear shift operations are made up to multiple gear shift positions. It is designed so that the gear shift operation tool can be used within an appropriate stroke range that is easy to operate. That is, in order to shift the shift wire in the winding direction, for example, the first shift lever may be pressed a plurality of times, and in order to shift the shift wire in the rewinding direction, the second shift operation tool is operated. The position holding by the position holding means may be released by. In this type of gear shift operation device, conventionally, for example, JP-A-2-88.
As seen in Japanese Patent No. 384, the direction in which the first speed change lever is operated to wind up the speed change wire and the direction in which the second speed change operation tool is operated to rewind the speed change wire are in the same direction. Was becoming.

[0003]

Conventionally, when performing a gear shift, the first gear shift lever and the second gear shift operating tool are mistaken because the operating directions of the first gear shift lever and the second gear shift operating tool are the same. It was sometimes operated. Also, since a gear shift operation device is provided near the handlebar grip,
Generally, one thumb is used to operate both the first speed change lever and the second speed change operation tool. However, since the position of the operation section most suitable for the speed change operation is one, the first speed change lever and the second speed change lever are operated. It tended to be very difficult to operate either one of the two-shift operation tool. It is an object of the present invention to provide a bicycle gear shift operation device that is easy to operate and easy to operate, and that is capable of gear shifting operation while making the handle support strong.

[0004]

In order to achieve the object, a bicycle gear shift operation device according to the present invention is the same as the one described at the beginning, in which the first gear shift lever is attached to the bicycle handlebar. The operating portion of the second shifting operation tool is located in the operable range of the forefinger of the hand holding the bicycle handlebar, and the operating portion of the second gear shift operating tool is located in the operating range of the thumb of the hand holding the bicycle handlebar. Further, the first shift lever and the second shift lever are arranged so that the operation portion of the first shift lever and the operation portion of the second shift operation tool come close to each other by the operation of the first shift lever and the second shift operation tool. The gear shift operation tool is supported by the fixing member.

[0005]

The first shift lever and the lever itself of the first shift operation tool, the operation tool itself, and the operating position are used to determine the first position.
The speed change lever is operated in the direction opposite to the operation direction of the second speed change operation tool by the index finger of the hand supporting the handle,
The speed change operation tool is firstly operated by the thumb of the hand supporting the handle.
The shift lever is operated in the opposite direction. That is, the index finger as a dedicated finger acts on the first gear shift lever, and the thumb as a dedicated finger acts on the second gear shift operation tool. It is no longer necessary to select the shift lever, which was required in the past, where the shift lever was operated with the same finger. Since the handlebar is supported by grasping the handle so that the handle is located between the thumb side of the hand and the side of the other fingers, when the thumb is largely released from the handle, the handle support action by the thumb side is performed. And the support strength of the handle decreases. On the other hand, even if the index finger is relatively far from the handle, the fingers other than the index finger support the handle, and the support strength of the handle does not decrease so much. Therefore, when operating the speed change lever with the finger of the hand while supporting the handle, the degree of separation of the finger from the handlebar is larger on the index finger side and smaller on the thumb side, as compared to the opposite case. The reduction in the handle support force due to the operation of the shift lever can be suppressed to be small. Further, the operation force required for the rewinding operation is smaller than that for the winding operation, and even if the second gear shifting operation tool is formed as a button type or a lever shorter than the first gear shifting lever, the gear shifting operation is hindered. By doing so, if the second gearshift operation tool is a button or a short lever and the first gearshift lever is made longer, the handle is supported by putting the palm or fingers other than those required for gear shifting as much as possible on the handle. It is possible to change gears while making them strong.

[0006]

EFFECTS OF THE INVENTION Both the first speed change lever and the second speed change operation tool are arranged so that a finger can easily reach them, and the first speed change lever and the second speed change operation tool can be easily confused with each other. I was able to change gears accurately and accurately. In addition, the second gear shift operating device may be of a button type or a short lever type, and the first gear shifting lever may be formed longer so that the handle support can be maintained in a firm state even during a gear shifting operation. It was Further, the second gear shift operation member is formed as a button type or a short lever to secure a space for arranging the indicator near the handlebar, so that the gear shift indicator can be compactly and easily installed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a brake lever BL is attached to a lever bracket B configured to be tightened and connected to a handlebar H, and a first shift lever 4, a second shift lever 7 and a speed display portion A are provided. In the state where the gear shift operation device E including the above is attached to the lever bracket B, and the lever bracket B is connected to the handlebar H, the operating portion 4a of the first gearshift lever 4 has the grip G of the handlebar H.
Is located in the same direction as the brake lever side, and is located within a range that can be operated by the index finger of the hand holding the grip G, and the operating portion 7a of the second gearshift lever 7 is located in the first position relative to the grip G of the handlebar H. Operation part 4a of the speed change lever 4
The brake lever device with a gear shift operating device for a bicycle is configured so as to be located on the opposite side to and in the range that can be operated by the thumb of the hand holding the grip G. In this brake lever device, the gear shift operation device E is positioned below the flat bar type handlebar H, and the lever blatt B is attached to the handlebar H in the vicinity of the grip G to swing the brake lever BL. By operating the brake device (not shown) for the front wheels or the rear wheels via the brake wire, the first transmission lever 4
Also, the front or rear transmission (not shown) is operated via the transmission wire O by swinging the second transmission lever 7.

The shift operating device E is constructed as shown in FIGS. In the figure, reference numeral 1 denotes a fixing member which is fixed to the handle bar H by being fixed to the lever bracket B. From this fixing member 1 to the handlebar H
The winding body 2 that acts on the inner wire O1 of the speed change wire O is rotatably supported on the support shaft 11 that extends downward so as to be orthogonal to the longitudinal direction. The winding body 2 has a winding portion 22a for the inner wire O1 on the outer peripheral portion.
And a locking portion 22b of the inner wire O1 are provided, and a return spring 20 is provided to bias the inner wire O1 in the rewinding direction. The position of the winding body 2 is held by the position holding mechanism P, its position holding is released by the position holding releasing means R, and the turning amount in the rewinding direction is regulated to a fixed amount by the regulating mechanism L. .. Further, as will be described later, a one-way mechanism W interposed between the first speed change lever 4 and the winding body 2 separates the original position N1 of the first speed change lever 4 from the rotational position of the winding body 2. Thus, the operability of the first speed change lever 4 is improved. Further, as will be described later, the position holding mechanism P includes a first engaging portion 31 and a first engaging body 32 that are engaged in stages,
The position holding releasing means R includes a first cam device C1, and the restriction mechanism L includes a second engaging portion 61, a second engaging body 62, and a second cam device C2. On the outer peripheral surface of the winding body 2, a large number of feed teeth 21 that are a part of the one-way mechanism W are provided.
Are provided at a small pitch in the circumferential direction, and the first engaging portion 31 and the second engaging portion 61 each having a large number of teeth are provided on the inner peripheral surface. In the figure, 12 is the support shaft 11
Is a holding cylinder that is non-rotatably supported by the first engaging body 3
2 and the second engagement body 62 are pivotally supported to the holding cylinder 12 by pawl shafts 35 and 65 which are substantially parallel to the support shaft 11. Further, a biasing spring 33 that biases the first engaging body 32 toward the first engaging portion 31, and a second engaging body 62 toward the second engaging portion 61 in the disengagement direction. An urging spring 63 is provided. Axial direction of the support shaft 11 (
Hereinafter, it is simply referred to as “axial direction”. ) On the lower end side, the first speed change lever 4 is swingably supported by a lever spring 5 so as to return and urge in the backward direction, and on the upper end side the second speed change lever 7 is supported by a lever spring 7b. It is swingably supported in a state in which it is biased to return in a direction opposite to the first shift lever 4. The original position N1 of the first gearshift lever 4 in FIG. 1 is determined by abutting the contact portion 43 provided on the first gearshift lever 4 to the setting portion 13 that is projected to the intermediate portion of the support shaft 11. .. Further, the original position N1 of the first speed change lever 4 is determined by abutting a contact portion 7c provided on the second speed change lever 7 to the setting portion 1a projected on the fixed member 1.
A feed pawl 41 is pivotally supported on the first speed change lever 4 in order to transmit the operating force of the first speed change lever 4 in the wire winding direction to the winding body 2 by engaging the feed dog 21. ,
The one-way mechanism W is constructed by urging the feed claw 41 by the urging spring 42 toward the feed dog 21. here,
The fixing plate 1 in which the projection 44 projecting from the feeding claw 41 is non-rotatably fitted to the support shaft 11 so as to release the engagement of the one-way mechanism W only when the first shift lever 4 is in the original position N1.
It is configured to ride on a fixed cam 45 formed on the peripheral portion of No. 4. Second shift lever 7 and each of the engaging bodies 3
2, 62 between the first and second cam devices C1, C2
Is provided. The driving nodes of each of these cam devices are the first and second axially projecting portions of the second gearshift lever 7 that project in the axial direction.
The cams 71 and 72 include followers, and first and second cam followers 34 and 64 respectively project from the first and second engaging bodies 32 and 62 in the axial direction. Then, with the swinging operation of the second speed change lever 7, first, the second cam device C2 presses the second engaging body 62 so that the second engaging body 62 can engage with the second engaging portion 61. The first engaging body 32 and the first engaging portion 31.
These cam devices are configured to be disengaged from.

The length from the swing axis of the second speed change lever 7 to the free end is smaller than the length from the swing axis of the first speed change lever 4 to the free end. That is, due to the action of the length of the first shift lever 4, the shift inner wire O1
It is possible to lighten the winding operation of the second gear, and by the action of the short length of the second speed change lever 7, it is possible to perform the rewinding operation of the speed change inner wire O1 while reducing the distance of the thumb from the handle grip G. I am doing it. According to the above configuration, due to the arrangement configuration of the speed change levers 4 and 7, the speed change wire O and the brake wire extend in a state of being extended from the speed change operation device A or the brake lever BL in a parallel or substantially parallel state. It can be arranged, which is advantageous in terms of aesthetics.

Next, the operation of the shift operating device constructed as described above will be described. As shown in FIGS. 1 and 2, the first shift lever 4 is moved to the original position N1 by a pulling operation with the index finger of the hand holding the grip G of the handlebar H.
From the operation portion 4a of the first speed change lever 4 to the second speed change lever 7
It is swung in the direction of approaching the operating portion 7a of FIG. Then, the first shift lever 4 moves forward in the X direction from the state of FIG. 4, the projection 44 of the one-way mechanism W slides down from the fixed cam 45, and the feed claw 41 rotates in the Z direction of FIG. Engage with teeth 21. Then, the winding body 2 moves forward through the feed claw 41, and the engagement of the first engaging body 32 with the first engaging portion 31 is released, so that the inner wire O1 of the speed change wire O is wound up. To do. At this time, the rotation of the first speed change lever 4 in the forward direction reaches the stroke of the engaging portion 31 for one pitch, so that one-step speed change can be performed. Note that the gear shift of two or more stages can be performed by temporarily returning the first gear shift lever 4 to the original position N1 and then again moving the first gear shift lever 4 forward. In the state where the gear is shifted to the desired large-diameter gear side gear position, the first engagement body 32 engages with the desired first engagement portion 31, and the rotation of the winding body 2 in the backward direction is blocked, so that It is possible to reliably maintain the shift state in which the gear is shifted to the radial gear side gear position. When the operation of the first shift lever 4 is released after shifting as described above, the lever 4 returns in the returning direction by the force of the lever spring 5, and the contact portion 43 and the setting portion 13 come into contact with each other. The first gearshift lever 4 depending on the contact
Returns to the original position N1 and stops to prepare for the next operation. At this time, the protrusion 44 rides on the fixed cam 45, and the engagement between the feed pawl 41 and the feed dog 21 is released.

Next, in order to shift from the state of shifting to the large-diameter gear stage to the small-diameter gear stage again, as shown in FIGS. 1 and 2, the thumb holding the grip G of the handlebar H is held. The operation portion 7a of the second speed change lever 7 is operated so as to be pulled in the Y direction, and the operation portion 7a of the second speed change lever 7 operates the second speed change lever 7 from the original position N2 in FIG. 1 to operate the first speed change operation lever 4. It is rocked in the direction of approaching the portion 4a and operated to the rewind position D in FIG. Then, the shift lever 7 moves in the Y direction from the state shown in FIG. By this operation, first, the second
After the engaging body 62 is forcibly pressed toward the second engaging portion 61 and the claw portion of the second engaging body 62 enters the second engaging portion 61, the first engaging body 32 and the first engaging body 32 The engagement with the engagement portion 31 is released as shown in FIG. At that time, the winding body 2 is
It moves forward in the Y direction within the one pitch of the first engaging portion 31 by an amount corresponding to the gap between the second engaging body 62 and the second engaging portion 61. Then, when the operation of the second shift lever 7 is stopped and the shift lever 7 returns to the original position side, the first engaging body 32 enters a position where it can be engaged with the first engaging portion 31, The pressing force of the second engagement body 62 is released, the engagement of the second engagement body 62 with the second engagement portion 61 is released, and the first engagement body 32 has the first engagement portion on the first-step small-diameter gear side. 31 and the return movement of the winding body 2 by the return spring 20 is prevented by this engagement, and the shift state in which the first engagement portion 31 is shifted to the small diameter gear side gear by one pitch is reliably maintained. it can. In addition, the second gear shift lever 7 that has returned is
The contact between the contact portion 7b and the setting portion 1a causes the original position N2
Stop and prepare for the next operation. The first speed change lever 4
It suffices that the operation section 4a of the second shift lever 7 and the operation section 7a of the second speed change lever 7 can be brought close to each other by the operation, and even if the positions of the respective operation sections are switched after the operation as shown by the two-dot chain line in FIG. Good. According to the above configuration, the shift wire O and the brake wire can be extended from the brake lever device to the transmission device side or the brake device side in a state where the shift wire O and the braking wire are arranged substantially parallel to each other.
It is possible to dispose both wires compactly or to unify them so that all inner wires are located inside the same outer wire.

As shown in FIG. 6, the speed display portion A is composed of a pointer member having a triangular pointer 8 and a display board portion 10 formed on the transmission case 9, so that the winding body 2 rotates. Along with this, the pointer 8 is rotated in the forward or reverse direction for interlocking the pointer member and the winding body 2, and is configured to indicate one of a plurality of numerical expressions provided on the display board 10. There is. That is, the speed stage at which the transmission is operated to change gears by the operation of the shift levers 4 and 7 can be determined by knowing the numerical display indicated by the pointer 8.

[Other Embodiments] Next, other embodiments of the present invention will be listed. (A) The gear shift operating device A is attached to the lever bracket B so that it can be assembled together with the brake lever BL onto the handlebar H all at once, and a connecting portion to the handlebar dedicated to the gearshift is provided so that the gearshift operating device A You may implement | achieve and may be comprised so that it may be attached to the handlebar H separately. (B) The first gear shift lever 4 and the second gear shift lever 7 do not have to be supported on the same shaft, and both levers 4, 7 may be pivotally supported on different support shafts. It is not necessary to orient the support shafts supporting 7 in parallel. (C) Instead of the second gear shift lever 7, a button type operation tool may be adopted for implementation. Therefore, these are collectively referred to as the second speed change operation tool 7. (D) In the above embodiment, the first and second engaging bodies 32, 6
Although 2 has a claw shape and the first and second engaging portions 31 and 61 have a large number of teeth, these relationships may be reversed. (E) The position holding mechanism P, the position holding releasing means R, the restricting mechanism L and the one-way mechanism W are not limited to those shown in the above embodiment, but various modifications can be made based on known techniques. .. (F) The swing axis of the brake lever BL and the swing axis of the speed change levers 4 and 7 may be arranged in parallel or in a non-parallel manner. (G) The gear shift operating device according to the present invention can be applied not only to a flat bar type handle, but also to a case where the gear type operating device is mounted and used on a bent type handle bar formed in various bent shapes. (H) The present invention can be implemented for operation of both rear and front derailleurs. In addition to the external transmission, the internal transmission can be operated.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a bottom view of the gear shift operating device in an attached state.

FIG. 2 is an explanatory diagram showing a relationship between a first speed change lever and a second speed change lever.

FIG. 3 is a sectional view taken along the line EE of FIG.

FIG. 4 is a cross-sectional view taken along the arrow of FIG.

FIG. 5 is an explanatory diagram showing a state in which a second shift lever is operated.

FIG. 6 is a perspective view of the entire shift operating device.

[Explanation of symbols]

 1 Fixing member 2 Rewinding body 4 First speed change lever 4a Operating part 7 Second speed changing operation tool 7a Operating part O1 Gear shifting wire M Winding position N1 Original position D Unwinding position N2 Original position W One-way mechanism P Position holding mechanism H Handlebar

Claims (1)

[Claims] 1. A fixing member (1), which is connected to a bicycle handlebar (H) and rotatably supports a winding body (2) of a speed change wire (O1), to the winding body (2). A first speed-changing lever capable of rotating the winding body (2) to the winding side in an interlocking manner via a one-way mechanism (W) and automatically returning from the winding position (M) to the original position (N1). (4) A position holding mechanism (P) that holds the winding body (2) in a stepwise position according to the winding length of the speed change wire (O1), and the position holding mechanism (P) holds the position. A bicycle provided with a second speed change operation tool (7) capable of rotating the winding body (2) to a rewinding side by a releasing operation and automatically returning from the rewinding position (D) to the original position (N2). A shift operating device for bicycles, comprising: The operating portion (4a) of the first gear shift lever (4) is located within the operable range of the index finger of the hand holding the bicycle handlebar (H) when the bicycle is attached to the dollar bar (H). The operation part (7a) of the tool (7) is located within the operable range of the thumb of the hand holding the bicycle handlebar (H), and the first speed change lever (4) and the second speed change operation tool ( By operating 7), the operation portion (4a) of the first speed change lever (4) and the operation portion (7a) of the second speed change operation tool (7) come close to each other, and the first speed change lever (4) and A shift operating device for a bicycle, wherein the second shift operating tool (7) is supported by the fixing member (1).