JPS623355Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is an operating device for a two-speed gear shift mainly used for a bicycle, and more specifically, an operating lever is supported by a fixed member mainly fixed to a bicycle frame through a lever shaft so as to be able to swing freely. By operating the lever,
The present invention relates to a two-speed gear shifting operating device for shifting a derailleur hanging frame between a high-speed position and a low-speed position via an operating wire stretched between the lever and an operating member of the derailleur. .

In general, the speed change operating device moves the reversing frame forward by operating a lever in the direction in which the wire is pulled;
When the lever is operated in the direction of loosening the wire, the reversing frame is moved back by the force of the return spring in the derailleur, so when changing gears, the operating lever must be swung in two opposite directions. As a result, not only was the gear shifting operation complicated, but the user was distracted by the direction of operation and could not quickly shift gears, resulting in poor gear shifting operability.

The present invention has been devised in view of the above points, and has a simple configuration that allows the chain guide member of the derailleur to be moved to high and low speed positions to change gears by swinging a single operating lever in one direction. A first spring is provided between the lever and the fixed member for biasing the lever in one direction in its swinging direction, and a one-way member between the lever and the fixed member is provided. An engagement pin is provided on the
A locking piece having a contact surface that contacts the engagement pin and an engagement hole for the pin that is continuous with the contact surface is supported on the other side member in a freely swinging manner, and A stopper that limits the swinging of the locking piece and a second spring that biases the locking piece toward the stopper are provided, so that when the lever swings against the first spring, the engaging pin is The contact with the contact surface causes the locking piece to swing so that the pin is engaged with the locking piece, while the lever swings beyond the engagement position with the engagement hole. , the pin is removable from the engagement hole.

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

In the figure, reference numeral 1 denotes a fixing member fixed near the grip of the handlebar H of the bicycle, and reference numeral 2 denotes an operating lever that is swingably supported on the fixing member 1 via a lever shaft 3. consists of a mounting piece 11 that is directly attached to the handlebar H by welding, and a support piece 12 that extends vertically from one end of the mounting piece 11 via a step. A regulating piece 13 for restricting swinging is formed by bending, and the lever shaft 3 is fixed with a set screw 14. Note that a screw hole 31 is provided at the center of the lever shaft 3.

Further, the operating lever 2 includes a boss portion 22 having a shaft hole 21 for receiving the lever shaft 3, and a boss portion 22 having a shaft hole 21 for receiving the lever shaft 3.
2 and an operating part 23 extending outward from the lever shaft 3, and is supported in a freely swingable manner by fitting the shaft hole 21 to the lever shaft 3.
A tightening screw 32 is screwed into the screw hole 31 of the lever 2 to prevent the lever 2 from being pulled out from the lever shaft 3.

Therefore, the support piece 1 of the fixing member is attached to the boss portion 22 of the operation lever 2 which is supported so as to be able to swing freely as described above.
A recessed portion 24 is provided that is open on the surface facing the lever 2 and has a larger diameter than the shaft hole 21, and is provided between the inner surface of the recessed portion 24 and the support piece 12 so that the lever 2 can be moved in one direction in its swinging direction. A first spring 4 that urges the lever 2 is provided on the inner surface of the recessed portion 24 of the lever 2, and an engaging pin 5 that protrudes toward the support piece 12 is provided. A locking piece 6 having a contact surface 61 that contacts the dowel pin 5 and an engagement hole 62 of the pin 5 that is continuous with the contact surface 61 is attached to the shaft 7.
The fixing member 1 is supported in a freely swinging manner through the
and a stopper 8 for regulating the swinging of the locking piece 6.
and a second spring 9 that urges the locking piece 6 toward the stopper 8.

The first spring 4 is made of a wire wound in the middle, the wound part is supported on the lever shaft 3 exposed in the recessed part 24, and one end is locked to the fixing member 1, The other end is connected to the recessed part 24 of the lever 2.
the lever 2 by engaging the side surface thereof.
This biases the operating wire W, whose one end is locked, in the direction of loosening. Further, the engagement pin 5 is connected to the shaft hole 2.
It is provided integrally with the operation lever 2 between the control lever 1 and the operation section 23.

Further, the locking piece 6 is pivotally supported on the shaft 7 protruding from the support piece 12 toward the lever 2,
The tip of the locking piece 6 is oriented in the direction of the engagement pin 5, and the locking piece 6 is formed of an elastic plate, and the contact surface 61 is provided at the tip of the locking piece 6. The engagement hole 62 is provided in the lever 2, and when the lever 2 is swung in a direction opposite to the first spring 4, the engagement pin 5 is brought into contact with the contact surface 61, and the operating force of the lever 2 is This causes the locking piece 6 to swing against the second spring 9, thereby causing the engagement pin 5 to engage with the engagement hole 62. Further, the locking piece 6 includes:
A relief surface 63 that slopes in the opposite direction to the contact surface 61 from the inner surface of the engagement hole 62 toward the surface facing the lever 2 is provided to prevent the lever 2 from engaging with the engagement hole 62. By swinging the locking piece 6 beyond the position, the locking piece 6 is bent toward the fixing member 1 side, and the tip of the engagement pin 5 is moved toward the relief surface 63.
This is done by moving it in a direction along which it separates from the engagement hole 62. In addition, the relief surface 63 is
As shown in FIG. 7, the locking piece 6 itself is formed by bending, but the inner surface of the engaging hole 62 itself may also be sloped.

The second spring 9 is made of a wire wound in the middle, and the wound portion is supported on the shaft 7,
One end is locked to the fixing member 1, the other end is engaged to the locking piece 6, and the locking piece 6 is biased toward the stopper 8.

The regulating piece 13 of the fixed member supports one end of the outer tube 0 that guides the wire W, and the operating lever 2 has a hook S attached to one end of the wire W. Supporting hook hole 25
and a guide groove 26 for guiding the wire.

The present invention, constructed as described above, is mainly used in motocross bicycles together with a rear derailleur, and FIG. 1 shows the derailleur with the replacement frame stopped at the high speed side position.

When the operating lever 2 is swung in the pulling direction of the operating wire W (direction of arrow X in FIG. 1) from the state shown in FIG. As the lever 2 swings, the engagement pin 5 provided on the lever 2 first contacts the tip contact surface 61 of the locking piece 6, and this contact transmits the operating force of the lever 2 to the locking piece 6. As the locking piece 6 swings against the second spring 9, the engaging pin 5 moves on the contact surface 61 and enters the engaging hole 62 of the locking piece as shown in FIG. This engagement causes a predetermined resistance to act on the swinging of the lever 2. By stopping the swinging operation of the lever 2 in this state, the hanging frame can be stopped at the low speed position.

Next, when moving the hanging frame forward from the low-speed side position to the high-speed side position, the state shown in FIG.
) from the operating lever 2, and then the operating wire W.
The operating force of the lever 2 is transmitted to the locking piece 6 by swinging the operating lever 2 beyond the engagement position with the engagement hole 62. The locking piece 6 is slightly bent toward the fixed member 1, and due to this bending, the engagement pin 5 comes into contact with a relief surface 63 provided continuously with the engagement hole 62,
As the engagement pin 5 moves on the escape surface 63, the amount of deflection of the locking piece 6 increases, and finally the engagement pin 5 moves into the engagement hole 62 as shown in FIG.
to break away from it. Due to this detachment of the engagement pin 5, the locking piece 6 swings toward the stopper 8 by the force of the second spring 9, and the position of the engagement hole 62 of the locking piece 6 is on the movement trajectory of the engaging pin 5. As the lever 2 moves away from the wire, the lever 2 automatically moves back in the direction of the loosening of the wire W (in the direction of the arrow Y in FIG. 10) by the force of the first spring 4. At this time, the operating lever 2 is
It comes into contact with and stops.

In the above explanation, the engagement pin 5 is attached to the operating lever 2.
A locking piece 6 and a stopper 8 are provided on the fixing member 1.
Although the second spring 9 and the second spring 9 are provided, they may be provided in the opposite manner.

Further, in the above explanation, the operating lever 2 is configured to be able to change gears by swinging in the pulling direction of the operating wire W, one end of which is locked to the lever 2. It may be configured such that the gear can be changed by swinging in the direction.

Further, in the above description, the first spring 4 is provided regardless of the structure of the derailleur, but in the case of a derailleur equipped with a return spring, the first spring 4 may also be used as the return spring.

In addition, in the above description, the locking piece 6 is provided with the relief surface 63 and is formed to be elastically deformable, so that the locking piece 6 is formed to be elastically deformable, so that the locking piece 6 does not swing beyond the engagement position with the engagement hole 62. While the locking piece 6 is bent by the above-described method, the engagement pin 5 is brought into contact with the relief surface 63 and the engagement pin 5 is detached from the engagement hole 62. The locking piece 6 may be moved along the shaft 7, or the engaging pin 5 may be formed to move or undulate in a direction away from the locking piece 6 having a relief surface 63. You can. Further, the relief surface 63 is connected to the engagement pin 5.
In short, any structure may be used as long as the engagement pin 5 can be disengaged from the engagement hole 62 by swinging the lever 2 beyond the engagement position with the engagement hole 62. .

Furthermore, the operating device of the present invention may be used not only for bicycles but also for motorcycles and the like.

As described above, according to the present invention, the derailleur replacement frame can be raised or lowered by an extremely simple operation of swinging one operating lever to one side in the swinging direction.
It is possible to change gears by swinging the gear to a lower speed position. Therefore, the gear shift operation can be performed easily and quickly without worrying about the direction of the shift operation, and the shift operability can be improved accordingly.

Moreover, since it has a simple structure that only incorporates a locking piece and two springs, the cost and weight can be reduced, and it can be formed compactly.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a side view, Fig. 4 is a longitudinal side view, Fig. 5 is a longitudinal front view, and Fig. 6 is a longitudinal sectional view. 7 is a perspective view of only the locking piece, and FIGS. 8 to 10 are explanatory diagrams showing the operating state. DESCRIPTION OF SYMBOLS 1...Fixing member, 2...Operation lever, 3...Lever shaft, 4...First spring, 5...Engagement pin, 6...
... Locking piece, 61 ... Contact surface, 62 ... Engagement hole, 8
...Stopper, 9...Second spring, W...Operation wire.

Claims (1)

[Scope of utility model registration request] An operating device for two-speed shifting, in which an operating lever is swingably supported on a fixed member via a lever shaft, and one end of an operating wire is locked to the lever,
A first spring is provided between the lever and the fixed member to urge the lever to one side in the swinging direction, and an engagement pin is provided on one side of the lever and the fixed member, and A locking piece having a contact surface that contacts the engagement pin and an engagement hole for the pin that is continuous with the contact surface is supported on the other side member in a freely swinging manner, and A stopper that limits the swinging of the locking piece and a second spring that biases the locking piece toward the stopper are provided, so that when the lever swings against the first spring, the engaging pin is The contact with the contact surface causes the locking piece to swing so that the pin is engaged with the engagement hole, while the lever swings beyond the engagement position with the engagement hole. . A two-speed gear shift operating device, characterized in that the pin is removable from the engagement hole.