JPH08239078A - Brake lever for bicycle - Google Patents

Abstract

PURPOSE: To adjust the brake operation feeling, according to the taste of a rider, in a brake lever for a bicycle equipped with a lever for pulling the end of an inner cable being pivoted rockably on a base and besides being pulled out of an outer cable. CONSTITUTION: The other end of a link body 31, where an inner cable 41 is coupled to its one end, is coupled rockably with a lever 3 by a pin 32, and a stopper 33, which abuts on the link body when the link body is rocked by a specified amount accompanying the rocking of the lever 3, is arranged at the lever 3, and the position of abutment between the stopper 33 and the link body 31 can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake lever used for a two-wheeled vehicle such as a bicycle and a motorcycle, and more particularly, to a driver's sense of operation from the lever through a series of braking operations by rotating the lever. It is the one.

[0002]

2. Description of the Related Art For example, a brake lever for a bicycle having a structure as shown in FIG. 8 is known. Base (2) secured to handlebars (1) with tightening bands (24)
A cable hole (22) is formed in the cable hole (2
One end of the brake cable (4) is inserted and fixed in 2). The engaging shaft (42) fixed to the end of the inner cable (41) is housed and fixed in the lever (3), and the lever (3) is supported on the base (2). It is rotatably supported by a shaft (23).

In this structure, when the lever (3) is gripped, the inner cable (41) is pulled out from the outer cable (40) and the brake rubber (not shown) is pressed against the rim, whereby a braking effect is obtained. However, in the above-mentioned conventional one, during a series of braking operations by the lever (3), the driver can drive the inner cable through the lever (3).
The manner of changing the tension received from (41) is uniform. Therefore, there is a problem that the feeling of the braking operation cannot be adjusted according to the driver's preference.

The braking operation feeling received from the lever (3) is determined by the length of the inner cable (41) pulled out from the outer cable (40) when the lever (3) is rotated by a unit angle, and at this time. It is determined by the resistance force that the driver receives from the lever (3) and the mode of change of the resistance force.
However, in the above conventional one, the inner cable (41)
Since the movement locus of the end is fixed in a simple arc shape drawn around the rotation fulcrum of the lever (3), the movement locus of the end of the inner cable (41), that is, the inner cable (41) The movement locus of the point of application of tension to the lever (3) cannot be changed, which makes it impossible to adjust the feeling of the braking operation.

The present invention has been made in view of the above points, and includes a "base for fixing the end portion of the outer cable (40)".
(2) and an inner cable rotatably supported by the base (2) and pulled out from the outer cable (40)
In a motorcycle brake lever equipped with a lever (3) for pulling the end of (41), the task is to be able to adjust the feeling of braking operation according to the driver's preference. To do.

[0006]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that "the other end of a link body (31) having one end connected to an inner cable (41) is connected to a lever (3) by a support shaft (32). Rotatably connected to the lever (3) by abutting on the link body (31).
The stopper (33) for restricting the rotation angle of the link body (31) due to the braking operation of the lever (3)
The contact position between the stopper (33) and the link body (31) can be adjusted ”.

[0007]

The above technical means operates as follows. In the initial braking operation, the link body (31) can rotate relative to the lever (3) by a certain angle, so the inner cable
The point of application of tension from (41) to the lever (3) coincides with the support shaft (32), which is an arcuate locus centered on the support point of the lever (3).

Further, when the lever (3) is rotated and the relative rotation angle of the link body (31) to the lever (3) reaches the predetermined angle, the link body (31) contacts the stopper (33). After this time, the point of application of tension from the inner cable (41) to the lever (3) is the link body (31) and the inner cable (41).
It becomes the connecting part of. Therefore, the link body (31) and the stopper (3
By adjusting the contact position with 3), the relative rotation angle range of the link body (31) with respect to the lever (3) is adjusted,
Within the range of the rotation operation angle of the lever (3), the link body (3
The ratio of the relative rotation angle of 1) changes, and the locus of the point of application of the tension in the braking operation changes according to the change of the ratio.

[0009]

[Effect] The present invention has the following unique effects. Since the moving locus of the tension action point of the inner cable (41) during braking operation can be changed, the lever (3)
It is possible to adjust the operation feeling received from the lever (3) by the driver during the braking operation in which the vehicle is rotated.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention described above will be explained with reference to the drawings. As shown in FIGS. 1 to 3, the tightening band (24) fitted on the handlebar (6) is attached to the base through the tightening bolt (25).
It is installed in (2). The base (2) is
6) (27) and the front plate (29) and the upper plate (28) which are erected in the range from the upper front surface to the upper surface of these both side plates, and thereby the internal space (20) Are formed.

Cable hole (22) formed in the front plate (29)
The front end of the brake cable (4) is fitted and fixed to the inner side of the brake cable (4).
The (41) is connected to the link body (31) via an engagement shaft (42) provided at the tip thereof. That is, the pair of left and right arms (313) (314) protruding from the tip of the link body (31) has a lateral hole (311) (311) for inserting the engagement shaft (42) at the tip of the inner cable (41). 312) is pierced and one arm (314) above
A cable insertion slit (315) for connecting the inside and outside of the lateral hole (312) drilled in this is opened and cut. Therefore, insert the inner cable into the cable insertion slit (315).
The engaging shaft (42) is inserted into one of the lateral holes (312) so that the (41) is inserted.
When the inner cable (41) is placed in a horizontal position, the engaging shaft (42) becomes rotatable around the link body (31).
(41) is connected to the link body (31). In this structure, since the engagement shaft (42) is rotatably connected to the sides (311) (312) of the link body (31), it is a nipple type engagement fixed to the end of the inner cable (41). The inner wire (41) can be pulled more smoothly than when the fitting is pulled by the link body (31).

Next, the link body (31) is rotatably accommodated in a lever (3) having a U-shaped cross section. That is, a shaft hole (35) is formed in the base end of the link body (31), and the support shaft (32) loosely inserted in the shaft hole (35) is attached to both side walls of the lever (3). (36) (37) is penetrated and the tip portion thereof is crimped, whereby the link body (31) is rotatably connected to the lever (3).

The stopper (33) for restricting the rotation angle of the link body (31) is composed of a bolt (330) in this embodiment. That is, by screwing the bolt (330) into the support plate (39) that is installed between both side walls (36) and (37) of the lever (3), the tip of the bolt (330) and the link body ( The interval of 31) can be adjusted, so that the feeling of the braking operation can be adjusted according to the driver's preference, as described later.

The lever (3) is rotatably attached to a support arm (201) protruding from the lower part of the base (2) via a support shaft (23). In this case, when the lever (3) is rotated from the state shown by the solid line in FIG. 1, the inner cable (41)
The point of application of the tension, that is, the support shaft (32) of the link body (31) makes a circular motion about the rotation center (support shaft (23)) of the lever (3). Then, with the rotation of the lever (3), the link body (3
1) gradually approaches the tip of the bolt (330). And
When the lever (3) is further grasped and rotated, the link body (31) comes into contact with the tip of the bolt (330) as shown by the imaginary line in FIG. The inner cable (4
The point of application of the tension of 1) shifts to the insertion portion of the engagement shaft (42) in the link body (31). After that, the inner cable (4
The engaging shaft (42) portion, which is the point of application of the tension in 1), makes a circular motion about the support shaft (23).

By adjusting the screwing amount of the bolt (330) to change the contact position of the bolt (330) and the link body (31) during the braking operation, the above-mentioned tension in the braking operation is changed. The locus of action points will change. As a result, the feeling of braking operation can be adjusted. In FIG. 4 showing the second embodiment of the present invention, a protrusion (34) is provided on the upper surface of the link body (31), and the support plate (39)
A bolt (330) screwed into the abutment is brought into contact with the projection (34), and this one also operates in the same manner as in the first embodiment.

In the embodiment shown in FIGS. 5 and 6, a cam plate (331) is adopted as the stopper (33). In this case, both side walls (36) (37) of the lever (3) and the cam plate (33
1) The tightening bolt (38) is passed through, and the tightening bolt (38) has a structure in which a male screw (382) is engraved on a cylindrical part extended to the tip of the hexagonal shaft part (381). The hexagonal hole (333) for inserting the hexagonal shaft (381) is formed in the cam plate (331), and the left and right side plates (36) (37) of the lever (3) are also described above. Hexagonal holes (367) (377) are formed to insert the hexagonal shaft portion (381). As a result, when the cam plate (331) is rotated and the tightening bolt (38) is tightened, the posture of the cam plate (331) is gradually adjusted and fixed at a predetermined angular interval. Therefore, the link body (31) and the cam plate (33) accompanying the operation of the lever (3)
The contact timing of 1) can be adjusted by changing the posture of the cam plate (331), and the same action and effect as those of the above-described first embodiment can be obtained.

In the fourth embodiment shown in FIG. 7, the bolt (330) is screwed into the link body (31). In this structure, when the link body (31) rotates in accordance with the braking operation, the head of the bolt (330) comes into contact with the stop plate (30) fixed to the lever (3). Even in this case, by adjusting the screwing amount of the bolt (330) with respect to the link body (31), the bolt (33
The contact timing of 0) and the stop plate (30) can be changed, and the same action and effect as those of the above-mentioned respective embodiments can be obtained. Further, in this embodiment, the stop plate (30) corresponds to the stopper (33) described in the above-mentioned technical means.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a connecting portion between the link body (31) and the brake cable (4).

[Fig. 3] Explanatory drawing of the attachment part of the tightening band (24) on the base (2)

FIG. 4 is an explanatory view of a second embodiment.

FIG. 5 is an explanatory diagram of a third embodiment.

FIG. 6 is an explanatory diagram of the third embodiment.

FIG. 7 is an explanatory diagram of a fourth embodiment.

FIG. 8 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 (2) ・ ・ ・ Base (3) ・ ・ ・ Lever (31) ・ ・ ・ Link body (32) ・ ・ ・ Support shaft (33) ・ ・ ・ Stopper (38) ・ ・ ・ Tightening bolt (39) ・..Support plate (40) ... Outer cable

Claims (4)

[Claims] 1. A base (2) for fixing an end portion of an outer cable (40), and an inner cable (41) rotatably supported by the base (2) and pulled out from the outer cable (40). ) Is equipped with a lever (3) for pulling the end of the inner cable (4)
The other end of the link body (31), which is connected to one end, is rotatably connected to the lever (3) by the support shaft (32) and brought into contact with the link body (31) to allow the lever (3) to move. The lever (3) is provided with a stopper (33) for restricting the turning angle of the link body (31) during braking operation to a constant value, and the contact position between the stopper (33) and the link body (31). Adjustable brake lever for motorcycles. 2. The brake lever for a motorcycle according to claim 1, wherein the stopper (33) is a bolt screwed into a support plate (39) fixed to the lever (3). 3. A cam plate (331), wherein the stopper (33) is rotatably supported by a tightening bolt (38) with respect to the lever (3) and is fixed in an arbitrary rotational posture. Brake lever for motorcycle according to item 1. 4. The link body by rotatably inserting an engaging shaft (42) provided at an end portion of the inner cable (41) into a lateral hole formed at a tip portion of the link body (31). The brake lever for a motorcycle according to any one of claims 1 to 3, which is connected to (31).