JPS6010240Y2 - Bicycle gear lever - Google Patents

Description

[Detailed description of the invention] The present invention relates to a gear shift lever for a bicycle, and more specifically, the lever body is rotatably inserted into a support shaft fixed to the main body frame of the bicycle via a bushing, and the lever body is rotatably inserted into the support shaft. This invention relates to a bicycle gear shift lever in which a fitted cap is tightened to provide resistance to rotation of the lever body.

Conventionally, this type of gear shift lever uses an adjustment screw threaded onto the support shaft to move the cap in the axial direction of the support shaft, thereby applying a predetermined rotational resistance to the bushing that rotates together with the lever body. However, the length of the bushing is longer than the axial length of the boss portion of the lever main body,
Moreover, a gap is formed between the circumferential side of the cap and the facing surface of the lever main body so that the resistance can be adjusted by moving the cap in the axial direction.

Grease is injected into the gap so that the lever body can rotate smoothly.

However, with a shift lever having such a structure, there is a problem in that the lever body moves axially with respect to the bushing, and rainwater etc. easily enter the gap, and grease injected through the gap can easily leak. It often leaked out.

As a result, the lever body does not rotate smoothly, resulting in problems such as the inability to operate the transmission accurately.

This invention was devised in view of these circumstances.
By inserting and supporting a seal on the outer periphery of the cap and bringing the seal into contact with the side end surface of the lever main body by a pressing means, the gap is completely covered and rain and ice are prevented from entering. The side end surface of the lever main body is held by the seal to eliminate rattling of the lever main body, so that the lever main body can always rotate smoothly as a whole.

Hereinafter, the configuration of the present invention will be explained according to the embodiment shown in the drawings.

In Fig. 1, reference numeral 1 denotes a support shaft that is non-rotatably fixed to the bicycle body frame via a mounting bracket 2, and a non-circular support rod 11 is formed extending from the support shaft 1, and a screw hole is formed in the center. 12 are provided.

A lever main body 3 is rotatably supported on the support shaft 1 via a bushing 31, and the bushing 31 rotates integrally with the lever main body 3.

Further, the support rod 11 of the support shaft 1 is provided with a spacer 4 and a cap 5.
is inserted and fitted so that it can move freely only in the axial direction.

Reference numeral 6 denotes an adjustment screw body screwed into the screw hole 12 of the support shaft 1, and the screw engagement of the adjustment screw body 1 moves the cap 5 toward the boss portion of the lever main body 3, and the cap 5, the spacer 4 is brought into pressure contact with the side surface of the boss portion of the lever main body 3, specifically, one side of the bushing 31 that rotates integrally with the lever main body 3, thereby causing the lever main body 3 to rotate. A predetermined contact resistance is given to the contact resistance.

A seal 7 having a flange 71 surrounding it is inserted between the flange 51 formed on the cap 5 and the opposing surface of the lever main body 3 on the boss side. is supported on the outer periphery of the cap 5, while this seal 7
A coil spring 8 constituting a pressing means is interposed between the inner bottom surface 72 of the lever body 7 and the flange 51 of the cap 5, and the elastic force of the coil spring 8 is used to push the flange 71 of the seal 7 against the side end surface of the lever body 3. 32.

The seal 7 is made of synthetic resin or synthetic rubber.

Further, in the figure, reference numeral 9av9b is a washer, and reference numeral 10 is a mounting hole 61 for the operating wire, which is the heir of the adjusting screw body 6 for rotational operation.

The bicycle gear shift lever of the present invention having the above-mentioned configuration is configured so that the spacer 4 is moved between the bushing 31 by screwing the adjustment screw body 6 and moving the cap 5 toward the boss side of the lever body 3. It is brought into pressure contact with one side to provide a predetermined contact resistance to the rotation of the lever main body 3.

As the cap 5 moves, the coil spring 8 is also pressed, and the elastic force generated in the coil spring 8 moves the seal 7 toward the lever body 3, causing the flange 71 of the seal 7 to move toward the lever body 3. Side end surface 32 of lever main body 3
The circumferential side of the seal 7 and the reel body 3 are in contact with each other.
The lever main body 3 is held by the flange 71 at the same time as covering the gap A existing between the opposing surfaces.

Incidentally, the present invention may be constructed as shown in FIG. 2 instead of the above embodiment.

That is, in the embodiment shown in FIG. 2, threaded portions 52 and 72 are formed on the outer peripheral surface of the cap 5 and the inner peripheral surface of the seal 7 as the pressing means, respectively, instead of the coil spring 8. The seal 7 is threadedly supported on the cap 5.

In this embodiment, after the cap 5 is moved by screwing the adjustment screw body 6 and a predetermined contact resistance is applied to the lever main body 3, the seal 7 is rotated as appropriate. Then, the flange 71 of the seal 7 may be brought into contact with the side end surface 32 of the lever main body 3.

As described above, in the present invention, a seal is fitted and supported on the outer periphery of the cap, and the seal is brought into contact with the side end surface of the lever main body by the pressing means, so that the circumferential surface of the seal and the lever body are in contact with each other. The gap existing between the facing surfaces with the main body is reliably covered, and rain and ice etc. do not enter into the gap, thereby eliminating the possibility that the grease injected into the gap will leak outside.

In addition, as the side end surface of the lever body is held by a seal, the lever body is free from wobbling, and the lever body can rotate smoothly as a whole, which is unlike anything seen in conventional gear shift levers of this type. It has excellent advantages that cannot be achieved by

[Brief explanation of the drawing]

The drawings show an embodiment of the speed change lever according to the present invention, and FIG. 1 is a sectional view showing the lever body with a part thereof omitted, and FIG. 2 is a sectional view showing another embodiment. 1... Support shaft, 3... Middle bar body, 4...
...Maza, 5...Cap, 6...
・Adjustment screw body, 7... Seal, 31...
・Butshu.

Claims (1)

[Scope of utility model registration request] The lever main body is rotatably inserted into a support shaft fixed to the vehicle body via a bushing, and a cap is inserted into the support shaft and tightened by an adjustment screw body screwed onto the support shaft to tighten the cap. In the gear shift lever, which is pressed against the bushing to provide resistance to the rotation of the lever body, a seal is inserted and supported on the outer periphery of the cap, and the seal is brought into contact with the side end surface of the lever body. A bicycle gear shift lever characterized in that it is provided with a pressing means for shifting the gear shift lever.