JPS632394Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a gear shift operating device mainly used for bicycles. Specifically, an operating lever is rotatably supported on a fixed member having a lever shaft, and the movement caused by the rotation of the lever is transmitted to the transmission. The present invention relates to a gear shift operating device that switches to a predetermined gear position.

Conventionally, as a gear shift operation device used for bicycles,
A plurality of engaging portions are provided on one side of the operating lever and a fixed member that supports the lever, and a locking body such as a ball that engages with one of the engaging portions is supported on the other side,
The locking body is biased toward the engaging portion by a spring, and the gear position is determined by the engagement of the locking body with the engaging portion, and at the same time, the lever is stopped at a position corresponding to the gear position. It is known that it is made to do so.

However, the conventional speed change operating device configured as described above is provided with a positioning mechanism consisting of the locking body and the engaging portion on the side of the boss portion of the operating lever.
A part of this positioning mechanism, especially the holding case of the spring that biases the locking body, protrudes significantly outside, which not only increases the overall size, but also makes the holding structure of the locking body complicated, making assembly difficult. In addition, there was a problem of high costs, and there was also a high risk that the driver's limbs would come into contact with the protrusion of the positioning mechanism and be injured, or that the driver's clothes would get caught and tear.

The present invention was devised in view of the above points, and the purpose is to provide a hollow part in the boss part of the operating lever, provide a part of the positioning mechanism in this hollow part, and prevent the positioning mechanism from protruding outside. The object is to eliminate this problem and to simplify the holding structure of the locking body in the positioning mechanism.

Therefore, the present invention provides a hollow part in the boss part of the operation lever, and arranges a fixing member for supporting the lever around the hollow part, so that the boss part forming the hollow part and the fixing member are arranged. An engaging portion is formed on one side, and a holding portion for a locking body that engages with the engaging portion is provided on the other side, and the band-shaped elastic plate is curved in an arc shape, and the elastic plate is curved in a circumferential direction of the elastic plate. An arcuate elastic body that bulges outward at least at one point in the middle and is integrally formed with the locking body that engages with the engaging portion is installed inside the hollow portion, and the locking body is connected to the engaging portion. By biasing the positioning mechanism in the direction shown in FIG.

An embodiment of the device of the present invention will be described below with reference to the drawings.

In the figure, 1 is a fixed body 11 with a hollow interior.
, a lever shaft 12 and an upper lid 13;
2, the fixed body 11 of the fixed member 1 has an open bottom wall and a mounting hole 11a in the center of the upper wall,
Also, on the side surface, the lever shaft 12 is inserted into the mounting hole 11a.
It protrudes in a direction perpendicular to the axis of the A mounting screw 14 is inserted into the mounting hole 11a, and a threaded tube 15 is directly attached to the bicycle frame by welding.
The fixed body 11 is fixed by a fixing means consisting of. Note that the fixing member 1 may be fixed using fixing means such as a tightening band.

The operating lever 2 has a boss portion 2a at one end and an operating portion 2b at the other end, and a shaft hole 21 for receiving the lever shaft 12 is provided at the center of the boss portion 2a. 21 of the lever shaft 1
The upper lid 13 is disposed in the shape of a disc and has a through hole on the outer end surface of the boss portion 2a via a washer 3, and the upper lid 13 is supported by the lever 2 by fitting into the lever. A predetermined rotational resistance is imparted to the lever 2 by screwing the tightening screw 4, which is non-rotatably supported on the shaft 12 and is inserted into the upper lid 13, into a screw hole 12a provided at the center of the lever shaft 12. At the same time, the upper lid 13 is fixed unrotatably.

As shown in FIGS. 1 and 2, the boss portion 2a of the operating lever 2, which is rotatably supported as described above, has a
A recessed hole that opens on the surface facing the upper lid 13 and has a larger diameter than the shaft hole 21 is provided on the same axis as the shaft hole 21 to form a cavity 22.
A cylindrical body 16 formed integrally with the upper lid 13 is disposed around the periphery (inside the cavity 22 in FIGS. 1 and 2), and the boss 2a forming the cavity 22 and the cylindrical body 16 are connected to each other. (Boss part 2a in Figures 1 and 2)
A plurality of engaging portions 51 are formed on the inner circumferential surface of the hollow portion 22 (inner circumferential surface of the hollow portion 22), and the engaging portions 51 are formed on the other side (the cylindrical body 16 in FIGS.
While the holding portion 17 of one of the locking bodies 52 of the engaging portion 51 is provided as a notch, the locking body 5
2, a substantially C-shaped elastic body 53 having an arcuate shape that biases the locking body 52 toward the engaging portion 51 is integrally provided, and the elastic body 53 is installed inside the hollow portion 22; The gear shift position is determined by engagement of the locking body 52 with the engaging portion 51, and at the same time, the lever 2 is stopped at a position corresponding to the gear shift position. The hollow portion 22 may be formed by protruding a cylindrical body, instead of being formed by providing a recessed portion in the boss portion 2a.

The locking body 52 and the elastic body 53 are integrally formed of a metal plate or the like, as shown in FIG. or,
Although the elastic body 53 is preferably formed into a substantially C-shape as shown in the figure, it may be formed into any other arc shape.

Further, the holding part 17 that holds the locking body 52 is
In addition to being formed on the cylindrical body 16 provided on the upper lid 13,
It may be provided on the lever shaft 12 or the fixed body 11. In this case, for example, by reversing the operating lever 2 shown in FIG.
2 is opened to the fixed body 11 side.
Further, the holding portion 17 may be formed into a shape capable of holding the locking body 52, and its shape is not particularly limited.

Further, although there may be one positioning mechanism consisting of the locking body 52 and the engaging portion 51, two sets may be provided as shown.

The boss portion 2a of the operation lever 2 has a winding groove 23 for winding the operation wire, and a locking hole 2 for receiving and locking a locking body fixed to one end of the wire.
4.

The present invention is constructed as described above, and as is known, an operating lever 2 and a movable member of a transmission (not shown) are connected by an operating wire, and the movable member is moved by rotating the lever 2. The gear is shifted to a predetermined gear position.

As the lever 2 rotates, the locking body 52 that has been engaged with one of the engaging parts 51 moves out from the engaging part 51 against the force of the elastic body 53. The locking body 52 is connected to the engaging portion 51
At the same time as it crosses the peak between the above engaging section and the next engaging section adjacent to this engaging section, it engages with the next engaging section due to the force of the elastic body 53, and due to this engagement, the operating lever The operating position of 2 is maintained. Moreover, the locking body 5
2 engages with the engaging portion 51 due to the force of the elastic body 53, an engaging sound is generated.
The sound is emitted from the engagement portion of the engagement portion 51 into the cavity 22, causing a resonance effect in the cavity 22,
This becomes an amplified loud sound, and this amplified sound from the cavity 22 is emitted to the outside.

In the embodiment described above, the cylindrical body 16 of the fixing member 1 is disposed inside the cavity 22 provided in the boss portion 2a of the operating lever 2, and the engaging portion is formed on the inner peripheral surface of the cavity 22. 51, and the support 16
Although the retaining portion 17 of the locking body 52 is provided in FIG.

In this case, for example, as shown in FIGS. 3 and 4, the cavity 22 is opened to the fixed body 11 side, and an annular groove 26 is provided on the outside of the cavity 22 via an annular partition wall 25. The fixed body 11 is provided with a cylindrical body 18 that protrudes into the annular groove 26, the cylindrical body 18 is provided with the engaging portion 51, and the annular partition wall 25 is provided with a through hole. The through hole portion is used as the holding portion 17, and the locking body 52 is held in the holding portion 17 in a freely movable manner. In addition, when the engaging part 51 is provided in the cylindrical body 18, by making the engaging part 51 concave,
The annular groove 26 provided in the operating lever 2 can be made unnecessary.

Furthermore, although a mechanism having a plurality of engaging parts 51 and one locking body 52 was used as the positioning mechanism, other mechanisms having one engaging part and a plurality of locking bodies were also used. May be used.

As described above, the present invention provides a hollow part in the boss part of the operation lever, and arranges a fixing member supporting and holding the lever around the hollow part, so that the boss part forming the hollow part and the fixing member are arranged around the hollow part. On one side with the parts,
an engaging part is formed, and the other side is provided with a holding part for a locking body that engages with the engaging part, and a band-shaped elastic plate is curved in an arc shape, and at least one part of the elastic plate is formed in the middle of the circumferential direction of the elastic plate. An elastic body having an arc shape that bulges outward at one point and integrally forms the locking body that engages with the engaging portion is installed inside the cavity, and the locking body is moved in the direction of the engaging portion. Since the positioning mechanism consisting of the engaging part, the locking body, and the elastic body can be prevented from protruding to the outside, the elastic body is formed into an arc shape and is housed inside the hollow part. The diameter around the cavity can be made small, and it can be formed compactly even though it can be positioned as a whole. Moreover, an arc-shaped elastic body is used in which the band-shaped elastic plate is curved in an arc shape, and at least one part of the elastic plate in the circumferential direction bulges outward, and the locking body is integrally formed. , the locking body and the elastic plate can be handled as one component, which improves the ease of assembly and reduces costs.Furthermore, the locking body can be integrally formed by processing the band-shaped elastic plate. Therefore, the weight of the elastic body having the locking body can be made lighter compared to the elastic body having a solid locking body.

Furthermore, since the positioning mechanism does not protrude to the outside, it is possible to completely eliminate injury to the driver's limbs and tearing of clothes due to the provision of the positioning mechanism.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing one embodiment of the device of the present invention, Fig. 2 is a sectional view taken along the line of Fig. 1, Figs. 3 and 4 show another embodiment; 4 is a partially cutaway front view, FIG. 4 is a sectional view taken along the line of FIG. 3, and FIG. 5 is a perspective view showing an arc-shaped elastic body integrally formed with a locking body. DESCRIPTION OF SYMBOLS 1...Fixing member, 12...Lever shaft, 2...Operation lever, 2a...Boss part, 22...Cavity part, 5
1... Engaging portion, 52... Locking body, 53... Elastic body.

Claims (1)

[Scope of utility model registration request] In a speed change operation device in which an operating lever is rotatably supported on a fixed member having a lever shaft, and one end of an operating wire is supported on the lever, a boss portion of the lever is provided with a hollow portion, and the boss portion of the lever is provided with a hollow portion. The fixing member is disposed around the boss part forming the hollow part, and an engaging part is formed on one of the boss part forming the hollow part and the fixing member, and a locking part that engages with the engaging part is formed on the other side. a body holding portion is provided, a band-shaped elastic plate is curved in an arc shape, and at least one part of the elastic plate in the circumferential direction is bulged outward;
A transmission characterized in that an arc-shaped elastic body integrally formed with the locking body that engages with the engagement portion is housed in the cavity, and the locking body is biased in the direction of the engagement portion. Operating device.