JPS6232955Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bicycle brake lever operating device that transmits lever operation to the brake via a transmission cable.

When operating the brakes by gripping the brake lever attached to the handlebar of a bicycle with your hand, the brake lever operation is suitable for adults with large hands and strong grip strength, and women and children with small hands and weak grip strength. The equipment also naturally differs.

That is, for people with large hands, the distance between the handlebar (or handlebar grip) and the brake lever may be large, but for people with small hands, the grip force will not work effectively unless the distance is small.

Also, people with strong grip strength can obtain sufficient braking force even if the brake lever ratio (the length between the pivot point and the force point of the brake lever: the length between the pivot point and the point of application) is relatively small; There is a problem in that a person cannot obtain sufficient braking force unless the brake lever ratio is relatively large.

In order to solve the above problem, it is possible to prepare many types of brake lever operating devices suitable for each condition, but manufacturing such many types of devices is not desirable from the viewpoint of production management. To,
This has the disadvantage that manufacturing costs also increase.

The present invention has been made to solve all of the above-mentioned problems, and it is an object of the present invention to provide a bicycle brake lever operating device that is a single device and has a wide range of applications.

Embodiments of the present invention will be described below with reference to the drawings.
In the figure, 1 is a bicycle handlebar, 2 is a brake lever pivot bracket that is fixed to the handlebar 1 via a tightening band (not shown), 3 is a cutout groove provided in the side wall of the bracket 2, and 4 5 is an outer receiver slidably fitted into this notched groove 3.
is an outer wire whose end is fixed to this outer receiver 4, 6 is an inner wire, and 7 is this inner wire 6.
8 is a brake lever; 9 is a pivot hole for the brake lever 8 provided in the bracket 2;

In the present invention, a small diameter eccentric shaft 10 that fits into a pivot hole 9 of a bracket 2 is connected to a large diameter shaft 11 in the shape of a disk.
On both sides of the shaft,
On the other hand, the brake lever 8 is provided with a base protrusion 8a of the large diameter shaft 10.
The brake lever 8 is provided with a fitting hole 12 so that the base 8a of the brake lever 8 is fitted onto the large diameter shaft 11 and the large diameter shaft 11 and the brake lever 8 can be fixed at any rotational phase.

That is, a plurality of recesses 13 (four in this embodiment) are arranged at appropriate intervals on the circumferential surface of the large-diameter shaft 11, and a screw hole 14 reaching the hole 12 is provided in the brake lever 8. A screw 15 is screwed into this screw hole 14 so that the end of the screw 15 engages with one of the recesses 13.

Further, a stopper pin 16 is provided protruding near the edge of the base 8a of the brake lever 8, and by engaging the stopper pin 16 with the edge 2a of the brake lever pivot bracket 2, the release stop position of the brake lever 8 is regulated. Configure it to do so.

That is, when the brake lever ratio is made relatively small by appropriately setting the shape of the end edge 2a of the bracket 2 and adjusting the position of the eccentric shaft 10 with respect to the brake lever 8, the solid line diagram in FIG. As shown in Figure 2, if the open stop position of the brake lever 8 is set far away from the handlebar 1, and conversely, the brake lever ratio is made relatively large, the brake Set the release stop position of lever 8 to handlebar 1.
can be approached.

Note that 17 (see FIG. 6) is a wire nipple insertion hole provided at a corner of the base 8a of the brake lever 8, and 18 is a wire nipple insertion hole provided in the base 8a of the brake lever 8 for inserting the inner wire 6 connected to the wire nipple 7.
The fan-shaped notch groove 19 provided at the corner of a is a notch groove for inserting the inner wire 6 provided only on one side of the notch groove 18 into the notch groove 18.

Next, the operation of the device of the present invention constructed as described above will be explained.

FIG. 1 shows the eccentric shaft 10 set at the lowest position in the figure. In this case, since the length between the center of the eccentric shaft 10, which is the pivot point, and the center of the wire nipple 7, which is the point of action, is small, the brake lever ratio described above is relatively large, so the force to operate the brake lever 8 is weak. Even inner wire 6
Sufficient braking force can be provided through the

Also, in this case, the brake lever 8 is activated by the engagement between the stopper pin 16 and the edge 2a of the bracket 2.
Since the release stop position of the brake lever 8 is close to the handlebar 1, even people with small hands can easily operate the brake lever 8.

In other words, the state shown in FIG. 1 is suitable for people with small hands and weak hands.

FIG. 2 shows a state in which the large diameter shaft 11 is rotated clockwise from the state shown in FIG. 1, and the eccentric shaft 10 is set at the uppermost position in the figure. To make this adjustment, the screw 15 is loosened, the large diameter shaft 11 is rotated, and the screw 15 is screwed in again at a predetermined position to force the end of the screw 15 into the opposing recess 13.

The state shown in Fig. 2 is the eccentric shaft 10 which is the pivot point.
Since the length between the brake lever and the wire nipple 7, which is the point of application, is longer, the brake lever ratio mentioned above is smaller than that in FIG. Therefore, although the magnification of the operating force applied to the brake lever 8 is small, if a person has strong grip strength, sufficient braking force can be obtained even with this level.

Furthermore, in this case, the engagement position between the stopper pin 16 and the edge 2a of the bracket 2 has moved downward in the figure, so the release stop position of the brake lever 8 is farther away than the handlebar 1.

Therefore, the situation shown in FIG. 2 is suitable for people with large hands and strong grip strength.

As described above, according to the present invention, a single device can be easily adapted to various conditions.
The excellent effect of being able to provide a bicycle brake lever operating device with a wide range of applications, which is advantageous in terms of production management, at a reduced manufacturing cost is achieved.

[Brief explanation of the drawing]

1 is a front view of the device of the present invention, FIG. 2 is a front view showing a part of the device in cross section, FIG. 3 is a side view thereof, and FIG. 4 is a partial sectional view taken along line A-A in FIG. Fifth
The figure is a perspective view of the large-diameter shaft and the eccentric shaft, FIG. 6a is a front view of the brake lever, and FIG. 6b is a side view thereof. 1... Handlebar, 2... Brake lever pivot bracket, 3... Notch groove, 4... Outer holder, 5... Outer wire, 6... Inner wire,
7...Wire nipple, 8...Brake lever,
9... Pivot hole, 10... Eccentric shaft, 11... Large diameter shaft, 11a... Extension protrusion, 12... Fitting hole, 13
...Concave portion, 14...Screw hole, 15...Screw, 1
6... Stopper pin, 17... Wire nipple insertion hole, 18... Fan-shaped notch groove, 19... Notch groove.

Claims (1)

[Scope of utility model registration request] Eccentric shafts that fit into the pivot holes of the brake lever pivot bracket are eccentrically protruded from both sides of a disc-shaped large diameter shaft, and the base of the brake lever is fitted onto the large diameter shaft. The diameter shaft and brake lever can be fixed at any rotational phase, and a stopper pin is provided protruding from the base of the brake lever.
A bicycle brake lever operating device in which the release and stop position of the brake lever is regulated by engaging the stopper pin with the edge of the brake lever pivot bracket.