JPH0118476Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a brake operating device for a bicycle, specifically, a bracket, a pivot part having a pivot hole that is pivotally attached to the bracket, and a pivot part from the pivot part to the pivot part. The present invention relates to a brake operating device for a bicycle, which comprises an operating lever having an operating section extending to one side with respect to the longitudinal direction of the operating lever, and the braking operation is performed by placing a finger on the outer surface of the operating section of the operating lever.

(Prior art) Conventionally, as this type of brake operation device, for example,
As shown in No. 56-42727, the operating lever is composed of a lever base made of a metal plate and a pair of molded bodies made of synthetic resin, and the molded bodies allow the lever base to be exposed to sanderches from both sides. The opposing surfaces of each of the molded bodies are joined and integrated, and the molded body at the pivot portion is provided with a circular insertion hole that opens on one side of the molded body and a wire that is continuous with the insertion hole. It is known that a wire hooking section is provided with a groove and a wire guide groove, and a hook for an operating wire is hooked to this hooking section.

However, in the case of this conventional structure, since the high-strength lever base is covered with a low-strength molded body, there is a problem that the strength is small relative to the cross-sectional area, and the synthetic resin covering the lever base is Since the above-mentioned latching portion is provided on the molded body, there is a problem that the strength of this latching portion cannot be increased beyond a certain value, and the latching portion becomes easily damaged. Since the insertion hole and the wire insertion groove of the molded body are opened on the side surface of the outer cover, there is a problem that the strength of the hooking portion of the molded body is reduced, and this hooking portion is more likely to be damaged.

(Problems to be Solved by the Invention) The present invention solves the problems of the conventional technology in which the operating lever is formed from a lever base made of a metal plate and a synthetic resin molded body, which has low strength against the cross-sectional area. This is an attempt to solve the problem that the wire hook part provided on the resin molded body is easily damaged, and the lever base with the inner cavity is formed from a metal plate.
By fitting a synthetic resin molded body with a wire hooking section into the inner cavity of the lever base, the strength against the cross-sectional area can be increased and the hooking section can be reinforced. be.

(Means for Solving the Problems) Therefore, the present invention includes a bracket, a pivot part having a pivot hole that is pivotally connected to the bracket, and a pivot part having one side from the pivot part in the longitudinal direction of the pivot part. The bicycle brake operating device comprises an operating lever with an operating part extending in the direction, and the braking operation is performed by placing a finger on the outer surface of the operating part of the operating lever, Consisting of a lever base made of a metal plate that is open and has a substantially U-shaped cross section and is continuous inside the pivot portion and inside the operating portion, and a molded synthetic resin body that fits into the inner cavity of the lever base. , a wire hooking portion having an insertion hole opening toward the outer surface and a wire guide groove continuous to the insertion hole is provided on the outside of the pivot portion of the molded body; A wall piece with a groove facing the hook is provided.

(Function) A molded body is fitted into the inner cavity of the lever base to form an operating lever, and a latching body for an operating wire is latched to a wire latching portion of the molded body, so that the operating lever can be operated. Braking is performed by pulling the wire.

(Example) Hereinafter, an example of the brake operating device of the present invention will be described based on the drawings.

What is shown in the drawing is a brake operating device mounted near the grip of a flat handle H, which includes a bracket 2 having a lever shaft 1 fixed to the handle H, and a lever shaft 1 of the bracket 2 that is swingable. It consists of a supporting operating lever 3.

The bracket 2 consists of vertically long side walls 21 and 22 that face each other, and a front wall 23 and a rear wall 24 that connect these side walls 21 and 22.
1 and 22 have a pair of through holes 25 in the center thereof,
25, and the lever shaft 1 is supported between these through holes 25, 25, and a groove 26 for guiding the operating wire W is provided in the upper part of the front wall 23. Further, a lower portion of the rear wall 24 of the bracket 2 is opened to the outside so that the operating lever 3 can be swung. Further, the front wall 23 is provided with an adjusting screw 10 for adjusting the grip dimension between the operating portion 33 of the operating lever 3 and the handle H.

Further, the operating lever 3 is inserted into the inside of the bracket 2 from the lower opening and is pivotally connected to the lever shaft 1 by a vertically elongated pivot portion 32 having a pivot hole 31.
and an operating portion 33 extending from the lower end of the pivot portion 32 to one side with respect to the length direction of the pivot portion 32. and the outer surface 3b opposite to
The brake can be operated by placing your finger on the brake.
Further, the operating lever 3 has a concave portion 34 in the proximal end by recessing the outer surface of the proximal end of the operating portion 33 in a curved manner toward the inner side 3a, so that the outer surface of the proximal end of the operating portion 33 is curved in the direction of the inner side 3a, and a recessed portion 34 is provided in the proximal end. When the operating lever 3 is operated swinging with the ring finger hooked onto the outer surface 3b of the operating part, the recessed part 34 prevents the index finger of the hand gripping the handle H from coming into contact with the operating part 33.

This invention provides a brake operation device configured as described above, in which the operation lever 3 has an open outer surface 3b and a cross-section having continuous portions 35a and 35b that are continuous inside the pivot portion 32 and the operation portion 33. U
It consists of a lever base 35 made of a letter-shaped metal plate, and a synthetic resin molded body 36 that fits into the inner cavity 35c of the lever base 35, while the molded body 3
On the outside of the pivot portion 32b of 6, the outer surface 3b
An insertion hole 37a that opens toward
A wire hooking portion 37 is provided with a wire guide groove 37b continuous to the wire guide groove 37b, and a wall piece 35e having a split groove 35d facing the hooking portion 37 is provided on the front surface of the lever base body 35.

In the above configuration, the lever base 35 is
A pair of pivot holes 3 on one end side as shown in Figures 1, 2, and 8.
1a, 31a and a substantially elliptical through hole 35f in the center thereof, the continuous portion 3 is formed by bending a substantially T-shaped metal plate having a substantially U-shaped cross section from the center thereof.
5a and 35b, and the pivot portion 32a
The wall piece 35e having the dividing groove 35d is provided by bending the end edge on the side opposite to the operating part inward,
Furthermore, a locking piece 35g that is inclined outward with respect to the inner surface 3a of the operating section 33a is provided at the tip of the operating section 33a.

Further, this lever base 35 is connected to the pivot portion 32a.
The inner side of the operating portion 33a and the inner side of the tip portion of the operating portion 33a are located on substantially the same plane. Further, the recessed portion 34a of the lever base 35 has an inner side 3
A is opened without being continuous, and the inner edge of this recessed portion is bent inward. Although the lever base 35 is formed from a metal plate such as an iron plate, it is of course possible to form it from other non-ferrous metal plates.

Further, the molded body 36 is formed into a flat shape so that its cross-sectional shape is substantially the same as that of the lever base 35, and is fitted into the inner cavity 35c of the lever base 35. Cardinal branch 3 of body 36
2b is provided with a pivot hole 31b, and the pivot portion 32
The operating wire W is located inside the outer surface 3b of b.
A through hole with a larger diameter than the locking body 4 fixed at one end is provided, and this through hole portion is used as the locking portion 37, and this locking portion 37 is connected to the inner cavity 35 of the lever base 35.
It is located within c.

Further, this latching portion 37 is formed into an oval shape extending in the length direction of the lever base 35 as shown in FIGS. 1 and 2, and the latching body 4 is attached to the operating portion side end thereof. The insertion hole 37a for insertion into the outer surface 3b is provided so as to open on the outer surface 3b,
Further, the wire guide groove 37 for guiding the wire W to the split groove 35d of the lever base body 35 is provided at the opposite end of the hooking part 37 from the insertion hole.
b is provided so as to be open to the outer surface 3b and front surface 3c. The hooking portion 37 may be formed into a circular shape, for example, but by forming the hooking portion 37 into an oval shape as described above and providing the insertion hole 37a at one end in the length direction, the hooking portion 37 can be formed into a circular shape. There is an advantage that the hooked body 4 can be prevented from being unexpectedly pulled out from the insertion hole 37a.

Further, the molded body 36 is provided with a finger hook 36a on its outer surface that protrudes outward from the outer open end of the lever base 35, and a finger hook 36a that protrudes outward from the outer open end of the lever base 35. A protrusion 3 that fits into the opening of the recessed part 34a is provided on the inner side of the recessed part 34a.
6b, and an engagement recess 36 that engages with the locking piece 35g at the tip of the operating portion 33b.
c.

Then, the locking piece 35g is locked in the engagement recess 36c, and the molded body 36 is rotated around this locking portion in a direction approaching the lever base 35, thereby causing the inner cavity 35c of the lever base 35 to move closer to the lever base 35. The pivot holes 31a, 31a of the lever base 35 and the molded body 3
A pair of flanged bushes 5, 5 made of synthetic resin are inserted into the pivot holes 31b of 6 to integrally connect the lever base 35 and the molded body 36.
The operating lever 3 is pivotally connected to the bracket 2 by inserting the lever shaft 1 into the bushes 5, 5. Note that the molded body 36 is attached to the locking piece 35.
In addition to rotating around the locking part of the locking piece 35g to the engagement recess 36c and fitting into the inner cavity 35c, for example, the locking piece 35g and the locking piece 35g can be inserted straight in the same direction as the inclination direction of the engagement recess 36c. You can fit it in. or,
The lever base body 35 and the molded body 36 may be connected by the lever shaft 1, and
The coupling means is not particularly limited.

Further, the finger hook portion 36a has a proximal end portion thereof formed to have a width approximately the same as the width of the lever base body 35, and a distal end portion thereof formed to be wider than the width of the lever base body 35, so that the finger hook portion 36a can accommodate fingers and fingers. The contact area is increased.

In the figure, 6 denotes a semicircular curved portion 61 that curves from the upper edge of the side wall 21 of the bracket 2 toward the other side wall 22, and a semicircular curved portion 61 that extends downward from the tip of the curved portion 61 and faces the outer surface of the side wall 22. 7 is a mounting screw that is inserted into a through hole 63 provided in the mounting portion 62 of the mounting body 6 and screwed onto the lever shaft 1, and this mounting screw By tightening the bracket 7, the diameter of the curved portion 61 is reduced, so that the bracket 2 is fixed to the handle H. Further, 8 is a cover made of synthetic resin that covers the bracket 2 and the mounting body 5.

The brake operating device constructed as described above is mainly attached to a flat handle, and the hooking body 4 of the operating wire W is hooked to the hooking portion 37 of the operating lever 3. This latch body 4 is inserted into the latch part 37 from the insertion hole 37a, and
The wire W
The end of the hook body side is guided by the wire guide groove 37b and fitted into the split groove 35d of the lever base end 35, and the outer cylinder O for guiding the wire W is inserted into the lower end of the front wall 23 of the bracket 2. We support them. Then, use the operating portion 33 of the operating lever 3 with the finger, for example, the middle finger and the ring finger, of the hand gripping the handle H.
By swinging the operating lever 3 in a direction approaching the handle H, the operating wire W is pulled and braking is performed. At this time, a recessed portion 34 is formed on the outer surface of the base end portion of the operating portion 33 of the operating lever 3.
, it is possible to prevent the finger of the hand gripping the handle H, for example, the index finger, from coming into contact with the operating lever 3.

In the embodiment described above, the recessed part 34 is provided in the operating portion 33 of the operating lever 3, but this recessed part 34 is not necessarily required. In this case, the inside 3a of the lever base 35 is continuous over almost the entire length, or only the inside of the pivot portion and the inside of the operating portion are continuous. Furthermore, when the recessed portion 34 is provided, it goes without saying that the inner side 3a thereof may be continuous. However, this recessed part 3
By opening the inside of 4, there is an advantage that the recessed portion 34 can be formed without drawing.

(Effects of the invention) As described above, the present invention provides an operation consisting of a pivot part having a pivot hole that is pivotally attached to the bracket, and an operating part extending from the pivot part to one side with respect to the length direction of the pivot part. The lever includes a lever base made of a metal plate having an open outer surface and a substantially U-shaped cross section that is continuous inside the pivot portion and the operating portion, and a molded synthetic resin body that fits into the inner cavity of the lever base. Because of this structure, the operating lever, and by extension the entire device, can be made lightweight, and the strength with respect to the cross-sectional area of the operating lever can be increased.

Moreover, the present invention provides a wire hooking portion having an insertion hole opening toward the outer surface and a wire guide groove continuous to the insertion hole on the outside of the pivot portion of the molded body, and Since a wall piece having a split groove facing the above-mentioned hook part is provided on the front surface,
This prevents the latching portion from opening on the side surface of the operating lever, and the latching portion can be reinforced by the wall pieces on both sides and the front of the lever base. The strength can be made greater than a certain value, and therefore, even though the wire hooking portion is provided on the synthetic resin molded body, it is possible to prevent the wire hooking portion from being damaged.

Furthermore, since the hooking portion does not open on the side surface of the operating lever, rainwater is less likely to enter the hooking portion, and the operating wire can be prevented from rusting due to rainwater.

[Brief explanation of the drawing]

1 and 2 are exploded perspective views showing an embodiment of only the operating lever in the brake operating device of the present invention;
3 is a sectional view of the device of the present invention, FIG. 4 is a sectional view taken along the line of FIG. 3, and FIG. 5 is a sectional view taken along the line of FIG.
6 is a sectional view taken along the line of FIG. 3, FIG. 7 is a side view, and FIG. 8 is a developed view of only the lever base. 2...Bracket, 3...Operation lever, 3a...
...inside, 3b...outer surface, 31...pivot hole, 32,
32a, 32b... Pivotal branch, 33, 33a, 33
b...Operation unit, 35...Lever base, 35c...
Inner cavity, 36...Molded body, 37...Latching part, 37
a...Insertion hole, 37b...Wire guide groove.

Claims (1)

[Scope of utility model registration request] It consists of a bracket, an operating lever having a pivot part having a pivot hole that is pivotally connected to the bracket, and an operating part extending from the pivot part to one side with respect to the longitudinal direction of the pivot part, A bicycle brake operating device in which the brake is operated by placing a finger on the outer surface of the operating portion of the lever, wherein the operating lever has an open outer surface and a cross section that is continuous between the inside of the pivot portion and the inner side of the operating portion. It consists of a lever base made of a substantially U-shaped metal plate, and a synthetic resin molded body that fits into the inner cavity of the lever base, and an opening toward the outer surface of the molded body at the pivot portion thereof. a wire latching portion having an insertion hole and a wire guide groove continuous with the insertion hole; and a wall piece having a split groove facing the latching portion on the front surface of the lever base. A unique bicycle brake control device.