JPH0439108Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a bicycle brake operating device, more specifically, a bracket fixed to a bicycle handlebar, etc.
The present invention relates to a bicycle brake operating device including a brake lever having a hooking portion for hooking one end of an operating wire for operating the brake.

(Prior Art) Conventionally, as a brake operating device for a bicycle, as described in, for example, Japanese Utility Model Application Publication No. 58-51114, a boss part of a brake lever consisting of a boss part and a grip part is attached to a bracket attached to a handlebar. While being swingably supported via a pivot pin, a hooking portion for hooking one end of an operating wire for operating the brake is provided on the boss portion, and the operating wire is pulled by swinging of the lever. I'm trying to operate the brakes on my bicycle.

(Problems to be Solved by the Invention) By the way, when riding a bicycle in general, there are cases where a weak braking operation is performed to decelerate the bicycle when riding on a flat surface or downhill, and there are cases where a strong braking operation is performed to bring the bicycle to a stop.

However, the brake lever in the conventional brake operating device is pivotally supported by the pivot pin, and the ratio of the distance between the pivot pin and the grip part to the distance between the pivot pin and the latching part of the operating wire, In other words, since the lever ratio is constant, if the lever ratio is increased so that the lever can be operated lightly, the movement of the latching portion due to the swinging of the lever, that is, the latching portion The towing stroke of the vehicle becomes small, making it impossible to obtain a large braking force, and if the lever ratio is made small in order to obtain a large braking force, there is a problem in that the operation of the lever becomes heavy during deceleration. . In other words, when setting the lever ratio, it is necessary to obtain sufficient braking force and to obtain light operation, which are contradictory to each other. Moreover, there was a problem in that it was not possible to perform light operations during deceleration.

This invention was devised in view of the above points, and focuses on the fact that by changing the lever ratio, lever operation can be made lighter, or lever operation becomes heavier, but greater braking force can be obtained. , by using one lever, two swing centers are provided so that the lever ratio can be changed by swinging the lever, and when decelerating, the lever is lightly rocked at a large lever ratio, while at the same time, the lever is not completely stopped. When doing so, the lever is swung at a small lever ratio in order to obtain a large braking force.

(Means for Solving the Problems) Therefore, the present invention provides the bracket 1 with a first lever support portion 17 and a second lever support portion 24 arranged side by side in the vertical direction of the bracket 1, and The first lever support portion 17 is attached to the lever 2.
a first pivot portion 29 that engages with the lever 2 to swingably support the lever 2; A second pivot portion 30 that engages with the second lever support portion 24 is provided, and the first pivot portion 29 is capable of separating from the first lever support portion 17 in the direction in which the wire is pulled. After the branch 30 is engaged with the second lever support part 24, the lever 2
There is one in which the lever is separated from the first lever support part 17 and is supported so as to be swingable around the second lever support part 24.

(Function) When operating the brake to decelerate, the brake lever 2 swings about the first pivot portion 29, and pulls the operating wire W at a large lever ratio. It is possible to pull the operating wire with a towing stroke that corresponds to the traction stroke and brake with a light force. When the lever 2 is largely operated when coming to a complete stop, the lever 2 swings about the second pivot 30 and at the same time the first pivot 29 moves from the first lever support 17 to the After separating in the wire pulling direction, the lever 2 is moved to the second pivot part 30 located on the opposite side of the wire hooking part 22 with respect to the first pivot part 29, that is, the first pivot part 29. 29, the second pivot portion 30, which is located at a position farther from the wire hooking portion 22, is pivoted as a pivot center, and the lever ratio becomes smaller. The moving distance of the latching portion 22, that is, the pulling stroke of the operating wire becomes large, and thereby a large braking force can be obtained.

(Embodiment) An embodiment of the bicycle brake operating device according to the present invention will be described below with reference to FIGS. 1 to 4. 1st
The brake operating device shown in FIGS. 4 to 4 is a brake operating device that is mounted near the grip G of a flat handle H, and includes a mounting portion 12, and by fixing the mounting portion 12 to the handle H, Bracket 1 attached near the grip G of the handle H
A brake lever 2 includes a pivot portion 21 that pivots to the bracket 1, a wire hook portion 22 that hooks one end of an operating wire W for operating a braking device (not shown), and an operating portion 23 that hooks a finger. It is composed of:

The bracket 1 includes a cylindrical mounting portion 12 through which the handle H can be inserted, and a side wall 1 facing oppositely.
3, 13, and a front wall 14 and a rear wall 15 connecting these side walls 13, 13, each of the walls 13, 1
3, 14, and 15 form a recessed portion 16 that is open upward in order to receive the pivot portion 21 of the brake lever 2 from above, and the open end of the recessed portion 16 is placed slightly toward the front wall 14. It is being expanded to.
Further, a through hole is provided in the center of the side walls 13, 13, and a pivot pin 18 is supported in the through hole, and the first lever support portion 17 is formed by this pivot pin 18.

Further, a screw hole 19 is provided in the side wall 14 near the mounting portion 12, and the screw hole 19
A screw 20 having a hemispherical tip is screwed into the front wall from the front side so that the screw 20 projects backward from the front wall 14, that is, into the recessed part 16. The tip portion forms a second lever support portion 24 . In this way, the first lever support part 17 and the second lever support part 24 are arranged side by side in the vertical direction of the bracket 1.

Further, a wire insertion hole 25 through which the operation wire W is inserted is provided at the upper end of the front wall 14, and
A support 2 for the outer cylinder O that guides the wire W
6 is installed.

Further, a screw hole is provided in the front wall 15, and an adjustment bolt 27 is screwed into the screw hole to adjust the distance between the operating portion 23 of the lever 2 and the grip G when the lever 2 is not operated, that is, the grip G. It allows you to adjust the position.

On the other hand, as described above, the lever 2 includes a pivot portion 21 that is inserted into the recessed portion 16 of the bracket 1;
It consists of a wire hooking part 22 and an operating part 23 bent at right angles from one end of the pivoting part 21 and extending outward. A substantially fan-shaped notch 28 that opens toward the front wall 14 is provided at a position corresponding to the pivot pin 18, that is, the first lever support portion 17, and the bottom portion thereof is connected to the first pivot portion 29. It is said that

Therefore, this first pivot 29 is connected to the pivot pin 1.
8, the lever 2 swings about the pivot pin 18. Further, an engagement recess corresponding to the second lever support portion 24 is provided on the opposite side of the wire hooking portion 22 with respect to the bottom surface portion, thereby forming a second pivot portion 30.
After the lever 2 swings at a certain angle around the first lever support part 17, the second pivot part 30 engages with the second lever support part 24, and swings around the second support part 24. It's starting to move.

In addition, 31 in the figure is a bush made of Juracon, which is provided so that the lever 2 can swing smoothly relative to the bracket 1, and has flanges at both ends, and the outer periphery of the bush 31 is connected to the notch. It is adapted to come into contact with section 28.

The present invention is constructed as described above, and in use, first, when the lever 2 is not operated,
Adjust the adjustment bolt 27 attached to the rear wall 15 of the bracket 1 to adjust the grip distance between the operating portion 23 of the lever 2 and the grip G to an interval that makes it easy to operate the lever 2. It is.

When performing a braking operation, the operation lever 2
At the initial stage, the lever 2 swings at a large lever ratio with the first lever support part 17 of the bracket 1 as the swing center. Therefore, when decelerating on a downhill slope, etc., the lever 2 can be lightly operated to perform the deceleration operation.

Further, from this state, when the operating lever 2 is further operated, the second pivot portion 30 is moved as shown in FIG.
engages with the second lever support portion 24, and as a result, the first pivot portion 29 separates from the pivot pin 18, and from then on,
It will swing around the second lever support part 24. Therefore, since the distance between the wire hooking portion 22 and the second pivot portion 30 is greater than the distance between the wire hooking portion 22 and the first pivot portion 29, the lever 2 swings at a small lever ratio. That's what I do. As the lever 2 swings at a small lever ratio in this manner, the moving distance of the wire hooking part 22, that is, the pulling stroke of the wire W increases, and therefore the swing angle of the lever 2 increases. This increases the traction stroke for the vehicle, resulting in a greater braking force. In this way, when decelerating, the brake lever 2 can be operated lightly and reliably, and when trying to come to a complete stop or when driving on a steep downhill slope, the lever 2 can be operated lightly and reliably.
By operating the brakes to a large extent, it is possible to easily obtain a large braking force. In other words, one brake lever 2 can accurately respond to various brake operations when riding a bicycle.

In addition, by screwing forward or backward the screw 20,
Since the position at which the center of swing of the lever 2 changes can be freely adjusted, together with the adjustment of the adjuster bolt 27, the braking operation can be performed according to the driver's weight and preference. be. Furthermore, since the open end of the recessed portion 16 of the bracket 1 is slightly enlarged toward the front wall 14, the amount of grip dimension adjustment can be increased.

Further, in this embodiment, the pivot pin 18 inserted through the front walls 13, 13 is engaged with the bottom surface of the notch 28 provided in the lever 2, so that the lever 2 and the bracket 1 can be swung relative to each other. However, the structure is not limited to this. For example, one of the lever 2 and the bracket 1 may be provided with a protrusion, and the other may be provided with an engaging portion that can be engaged with the protrusion. When the lever 2 is swung at a certain angle and the lever 2 is swung around the second pivot 30, the protrusion or engaging portion provided on the lever 2 moves from the engaging portion or protrusion provided on the bracket 1 to the wire. It is only necessary to make it possible to separate in the direction in which W is pulled.

Also, when the lever 2 swings a certain amount, the lever 2
The engagement recess provided in the lever 2 is capable of engaging with the hemispherical tip of the screw 20, but the lever 2 is provided with a convex member, and when the lever 2 swings a certain amount,
The convex member may be engaged with a concave member provided on the bracket 1, so that the lever 2 can swing around the concave member as a pivot point.

(Effect of the invention) As described above, the present invention provides the bracket 1 with the first lever support part 17 and the second lever support part 24 arranged in parallel in the vertical direction of the bracket 1, and the lever 2 with the first lever support part 17 and the second lever support part 24 arranged side by side in the vertical direction of the bracket 1. Said first lever support part 17
a first pivot portion 29 that engages with the lever 2 to swingably support the lever 2; A second pivot portion 30 that engages with the second lever support portion 24 is provided, and the first pivot portion 29 is capable of separating from the first lever support portion 17 in the direction in which the wire is pulled. After the branch 30 is engaged with the second lever support part 24, the lever 2
Since the lever is moved away from the first lever support part 17 and is swingably supported around the second lever support part 24, the lever is moved away from the first pivot part when performing a braking operation during deceleration. When the lever is swung at a large lever ratio as the center of oscillation, allowing light and reliable braking, when the lever is operated greatly to bring the vehicle to a complete stop or when driving down a steep downhill slope, The first pivot part is separated from the first lever support part, and a second pivot part located on the opposite side of the wire hooking part with respect to the first pivot part engages with the second lever support part, As the lever swings at a smaller lever ratio than the lever ratio when the lever swings about the first pivot point, the wire traction stroke of the wire hooking portion increases. This makes it possible to obtain a large braking force. Therefore, when decelerating, you can lightly operate the brake lever to ensure braking while bringing the vehicle to a complete stop, or when driving down a steep slope.
It is possible to provide a brake operating device that can easily obtain a large braking force by operating the lever in a large amount.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the brake operating device of the present invention, Figs. 2 and 3 are longitudinal sectional views of main parts, and Fig. 4 is a left side view of only the bracket in Figs. 2 and 3. It is. 1... Bracket, 2... Brake lever, 2
2... Wire hook part, 17... First lever support part, 24... Second lever support part, 29... First pivot part, 30... Second pivot part.

Claims (1)

[Scope of utility model registration request] This is a bicycle brake operating device comprising a bracket 1 and a brake lever 2 having a wire hooking portion 22 for hooking one end of an operating wire. A first pivot portion 29 is provided on the lever 2 and engages with the first lever support portion 17 to swingably support the lever 2. And this first cardinal branch 29
located on the opposite side of the wire hooking part 22,
After the lever 2 swings, the second lever support section 24
A second pivot part 30 is provided which engages with the second pivot part 30, while the first pivot part 29 can be separated from the first lever support part 17 in the pulling direction of the wire, and the second pivot part 30 engages with the second lever support part 30. After engaging with the part 24, the lever 2 is separated from the first lever support part 17 and is supported so as to be swingable about the second lever support part 24. Brake operating device.