JPH0455918B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Industrial Application Field The present invention provides a first brake lever that is manually operated at one end of the handle, and a second brake lever that is also manually operated at the other end of the handle. The present invention relates to a bicycle brake device provided respectively.

(2) Prior Art Conventionally, in such bicycle brake devices, the brake lever at the right end of the handle is connected to the front wheel brake via a brake wire, and the brake lever at the left end of the handle is connected to the rear wheel brake via a brake wire. It is common to

(3) Problems to be solved by the invention However, when a sudden brake operation is applied while driving, the operating force of the brake lever on the dominant arm, for example, the right side, tends to be stronger, and the braking force of the front wheel brake is large. You may get bent over and lose the handle or fall. In addition, there are times when it is unavoidable to operate the brakes with one hand, but in this case, applying only the front brake is dangerous as there is a risk of falling, and applying only the rear brake does not provide sufficient control. Can't get power.

The present invention was made in view of such circumstances, and no matter which brake lever is operated,
To provide a bicycle brake device capable of operating front and rear wheel brakes and always starting to operate the rear wheel brake first and then the front wheel brake.

B. Structure of the Invention (1) Means for Solving the Problems According to the present invention, the base of the rocking plate formed by connecting the upper plate part and the lower plate part in a substantially V-shape is connected to the upper part of the handle post. A pair of first power transmission cables are supported by a casing attached to the casing so as to be able to swing within the casing, and the other ends of a pair of first transmission cables are connected to the first and second brake levers individually, respectively, and the other ends of the first transmission cables are connected to the swing plate. The other ends of the second power transmission cables for the rear wheels, which are respectively engaged near the tips of the upper plate parts at the same distance from the base and have one end connected to the rear wheel brake, are connected to the upper plate part of both of the first power transmission cables. At a position where a distance is shorter than the distance between the base of the swing plate and the base of the swing plate, the lower plate part is inserted from a direction opposite to the direction of engagement with the upper plate part of the first power transmission cable. The other end of the second transmission cable for the front wheels, which is engaged with the second transmission cable for the rear wheels and whose one end is connected to the front wheel brake, is connected to the second transmission cable for the rear wheels on the lower plate part closer to the base than the engagement position of the second transmission cable for the rear wheels. It is engaged from the same direction as the cable.

(2) Operation When one or both brake levers are operated, the upper plate rotates upward,
In response, the lower plate portion rotates upward and both brakes are activated. Moreover, since the second electric cable for the front wheel is engaged with the lower plate part closer to the base than the second electric cable for the rear wheel, the amount of traction of the second electric cable for the rear wheel is the same as that of the second electric cable for the front wheel.
This is greater than the amount of traction of the electric cable, so the rear brakes are activated first. In addition, the first transmission cable is
Since the upper plate part is engaged at a position where the distance from the base is greater than the distance between the engagement position of the second rear wheel transmission cable with the lower plate part and the base, the amount of operation is relatively small. A large amount of braking force can be obtained.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. The front wheel brake Bf is attached to the rear of the body frame F, and the rear wheel Wr
A rear wheel brake Br is installed to obtain braking force through friction with the rim 2 of the wheel. A handle post 4 is rotatably supported on a head pipe 3 at the front of the vehicle body frame F, and a first brake lever L1 is gripped at the right end of a handle 5 attached to the upper end of the handle post 4. A second brake lever L2 is arranged at the left end of the handle 5 so that it can be rotated toward and away from the grip 7.

Referring to FIGS. 2, 3, and 4, one ends of a pair of first transmission cables 8, 9 are individually connected to the first and second brake levers L1, L2.

That is, the first transmission cables 8 and 9 are constructed by movably inserting inner wires 12 and 13 into outer wires 10 and 11, and one end of the outer wires 10 and 11 connects both brake levers L1 and L2 to the handle 5.
Attachment members 14 and 15 are connected and fixed for attachment to. Moreover, one end of the inner wires 12 and 13 is
It protrudes from one end of the outer wires 10 and 11 and is connected to the brake levers L1 and L2, respectively.

The front wheel brake Bf is a caliper brake,
Brake rubber 18, 19 that can slide on the side surface of the rim 1 is attached to actuating pieces 16, 17 at one end that are rotatably supported on the body frame F so as to straddle the front wheel Wf.
is attached, and a return spring 20 is interposed between the two actuating pieces 16 and 17. One end of the second front wheel power transmission cable 21 is connected to this front wheel brake Bf.

The second power transmission cable 21 for the front wheels is made up of an inner wire 23 movably inserted into an outer wire 22, and one end of the outer wire 22 is connected to one operating piece 16.
One end of the inner wire 23 protruding from one end of the outer wire 22 is connected to the other actuating piece 17 .

The rear wheel brake Br is also a caliper brake like the front wheel brake Bf, and the brake rubber 24, 2
A pair of actuating pieces 26, 27 to which 5 is attached, and a return spring 28 interposed between the actuating pieces 26, 27.
It consists of One end of a second power transmission cable 31 for the rear wheel, which is formed by movably inserting an inner wire 30 into the outer wire 29, is connected to the rear wheel brake Br. That is, one end of the outer wire 29 is connected to one of the actuating pieces 26, and one end of the inner wire 30 protruding from one end of the outer wire 29 is connected to the other actuating piece 27.

A casing 33 is attached to the top of the handle post 4.
is installed. The casing 33 consists of a box-like body 34 with one side open, and a lid member 36 that is removably fixed to the box-like body 34 with a screw member 35 to close the opening of the box-like body 34. The box-like body 34 is integrally provided with a mounting part 38 formed in a cylindrical shape and having a single slit 37 extending in the axial direction. Flange parts 39, 40 provided on both edges
By tightening with bolts 41 and 42,
A casing 33 is fixed to the handle post 4.

A swing plate 43 is housed within the casing 33. This swing plate 43 has an upper plate part 44 and a lower plate part 45.
are integrally connected in a substantially V-shape, and their connecting portion, that is, the base 43a
It is rotatably supported by a horizontal support shaft 46 on the inner surface of the side box-like body 34. Therefore, the rocking plate 43
As shown in FIG. 2, there is a non-operating position in which the lower plate part 45 is in a posture substantially orthogonal to the handle post 4, and an operating position in which the lower plate part 45 is in a posture in which it is rotated upward from the non-operating position. It can be freely swung up and down between.

Ceiling portion 3 of box-like body 34 in casing 33
4a is formed substantially parallel to the upper plate part 44 in the non-operating position and close enough to the upper plate part 44 to allow the upper plate part 44 to rotate to the operating position, By doing so, it becomes possible to attach the casing 33 to the upper part of the handle post 4 as close as possible to the handle 5, and the size of the casing 33 is also reduced as much as possible.

Out wires 10 and 11 of the pair of first power transmission cables 8 and 9 are provided on the ceiling portion 34a of the casing 33.
The other end is fixed at a right angle. Inner wires 12 and 1 protrude from these outer wires 10 and 11.
3 is drawn into the casing 33. on the other hand,
Near the tip of the upper plate portion 44 of the rocking body 43,
A pair of through holes 47, 47 are bored at positions having the same distance 11 from the base 43a, and the other ends of the inner wires 12, 13 that movably pass through the through holes 47, 47 are locked. Heads 48 and 49 are provided, and coil springs 50 and 51 are interposed between each of the locking heads 48 and 49 and the lower surface of the upper plate portion 44, respectively.

Therefore, the other ends of the inner wires 12, 13 in both the first transmission cables 8, 9 are connected to the coil springs 50,
51, the inner wires 12 and 13 are pulled in response to brake operations of the first and second brake levers L1 and L2, and the upper plate part 44 is rotated upward. do. Moreover, since the outer wires 10 and 11 are fixed at right angles to the ceiling part 34a, the inner wire 1
2 and 13 are fixed parts of the outer wires 10 and 11, and the inner wires 10 and 1
1. Towing operation becomes smooth.

A through hole 52 is bored in the lower plate portion 45 at a position where the distance l2 from the base 43a is smaller than the distance l1 (l1<l2), and the base 4
A through hole 53 is bored closer to 3a.

Outer wire 2 in second power transmission cable 31 for rear wheel
The other end of 9 is fixed to the lower part of the box-like body 34 in the casing 33 at a position corresponding to the through hole 52 .

The inner wire 30 protruding from the other end of the outer wire 29 is movably penetrated through the lower part of the box-shaped body 34, drawn into the casing 33, and further inserted into the through hole 52 from below. Furthermore, the other end of the inner wire 30 is provided with a locking head 54 that engages with the upper surface of the lower plate portion 45 .

Outer wire 2 in the second power transmission cable 21 for front wheels
The other end of 2 is connected to the box-shaped body 3 at a position corresponding to the through hole 53.
It is fixed at the bottom of 4. The inner wire 23 protruding from the other end of the outer wire 22 movably passes through the lower part of the box-shaped body 34, is drawn into the casing 33, and is inserted into the through hole 53 from below. Furthermore, the other end of the inner wire 23 is provided with a locking head 55 that engages with the upper surface of the lower plate portion 45 .

In this way, the front wheel and rear wheel second transmission cable 2
The other ends of the inner wires 23 and 30 in the first transmission cables 8 and 9 are
The lower plate portion 45 is engaged with the lower plate portion 45 from a direction opposite to the direction in which the upper plate portions 2 and 13 are engaged with the upper plate portion 44 .

Next, the operation of this embodiment will be explained. In order to obtain braking force while riding a bicycle, one of the first and second brake levers L1 and L2,
Alternatively, when the brakes are operated on both, either one or both of the inner wires 12 and 13 in the first transmission cables 8 and 9 is pulled, the upper plate portion 44 rotates upward, and the lower plate portion 45 rotates upward at the same time. move. As a result, the inner wires 23 and 30 of the second power transmission cables 21 and 31 for the front wheels and the rear wheels are pulled, and the front and rear wheel brakes Bf and Bl are operated, but the inner wires 30 of the second power transmission cables 31 for the rear wheels are Inner wire 2 of second power transmission cable 21 for front wheels
3 is engaged with the lower plate portion 45 closer to the tip. Therefore, the amount of traction of the inner wire 30 is greater than the amount of traction of the inner wire 23, and the rear wheel brake Br starts operating first, and the front wheel brake Bf starts operating slightly later. As a result, sufficient braking force can be obtained on the rear wheel Wr side, and excessive braking force can be prevented from acting on the front wheel Wf side, thereby reducing the risk of falling.

In addition, the inner wires 12 and 13 in the first transmission cables 8 and 9 are connected to the engagement position with the lower plate 45 of the inner wire 30 in the second transmission cable 31 for rear wheels and the base 4.
3a, the distance l1 is larger than the distance l2 from the base 4.
3a, the inner wires 2 of the second power transmission cables 21, 31 for the front and rear wheels can be connected with a relatively small operating force.
3, 30 can be towed with a relatively large force, and a relatively large braking force can be obtained with a relatively small operating force.

Furthermore, since coil springs 50 and 51 are interposed between the inner wires 12 and 13 of the first transmission cables 8 and 9 and the upper plate part 44, when only one of the brake levers L1 and L2 is operated It is possible to prevent rattling from occurring on one side to the other.

Furthermore, by attaching the casing 33 to the upper part of the handle post 4, the length of the second power transmission cable 21 for the front wheel can be made relatively long to facilitate adjustment of the front wheel brake Bf, and the second power transmission cable 21 for the front wheel can be made relatively long. Smooth operation can be achieved by reducing the degree of bending of 21. This is handle post 4
Sports type bicycles with a relatively short length are particularly advantageous.

C. Effects of the Invention As described above, according to the present invention, the base of the rocking plate formed by connecting the upper plate part and the lower plate part in a substantially V-shape,
The other ends of a pair of first power transmission cables are supported by a casing attached to a handlebar post so as to be able to swing within the casing, and the other ends of the first power transmission cables are connected to the first and second brake levers individually. A second power transmission cable for the rear wheel was engaged with the lower plate part from a direction opposite to the direction of engagement of the first power transmission cable, and one end was connected to the front wheel brake. Since the second power transmission cable for the front wheel is engaged with the lower plate part closer to the base than the second power transmission cable for the rear wheel from the same direction as the second power transmission cable for the rear wheel,
When one or both of the brake levers is operated, the rear brake is operated first and then the front brake is operated, thereby preventing the vehicle from falling and providing sufficient braking force.

Further, the other end of the second transmission cable for the rear wheel is connected to the lower plate at a position where the engagement position with the upper plate part of the first transmission cable is smaller than the distance between the base parts. Since the brake lever is engaged with the brake part, a relatively large braking force can be obtained with a relatively small brake operation force.

Furthermore, since the casing is attached to the top of the handle post, the length of the second power transmission cable for the front wheel can be made relatively long, making it easier to adjust the front wheel brake, and the degree of bending of the second power transmission cable for the front wheel can be reduced. This ensures smooth operation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partial perspective view of a bicycle, FIG. 2 is an enlarged perspective view of the main part seen from the arrow direction of FIG.
FIG. 4 is a cross-sectional view taken along the line 4, and a perspective view showing the connection state of the power transmission cable. 4...Handle post, 5...Handle, 8,
9...First transmission cable, 21...Second transmission cable for front wheel,
31... Second transmission cable for rear wheel, 33... Casing, 34a... Ceiling part, 43... Rocking plate, 43a
... Base, 44 ... Upper plate part, 45 ... Lower plate part, l
1, l2... Distance, Bf... Front wheel brake, Br...
...Rear wheel brake, L1...1st brake lever,
L2...Second brake lever, Wf...Front wheel, Wr
……Rear wheel.

Claims (1)

[Scope of Claims] 1. A bicycle brake device in which a manually operated first brake lever L1 is provided at one end of the handle 5, and a similarly manually operated second brake lever L2 is provided at the other end of the handle 5. In this case, the base portion 43a of the swing plate 43, which is formed by connecting the upper plate portion 44 and the lower plate portion 45 in a substantially V-shape, is connected to the handle post 4.
It is supported by a casing 33 attached to the upper part of the brake lever L so as to be able to swing within the casing 33, and one end is connected to the first and second brake levers L.
The other ends of the pair of first power transmission cables 8 and 9, which are individually connected to L1 and L2, are respectively engaged near the tip of the upper plate part 44 with the distance l1 from the base 43a of the swing plate 43 being the same, and one end The other end of the second transmission cable 31 for the rear wheel connected to the rear wheel brake Br is at the engagement position with the upper plate part 44 of both the first transmission cables 8, 9 and between the base 43a of the swing plate 43. At a position with a distance 12 shorter than the distance 11 between it and the base 43a,
The other end of the second transmission cable 21 for the front wheel is engaged with the lower plate part 45 from the direction opposite to the direction in which the first transmission cables 5 and 9 are engaged with the upper plate part 44, and the other end of the second transmission cable 21 for the front wheel is connected to the front wheel brake Bf. , a bicycle brake characterized in that it is engaged from the same direction as the second power transmission cable 31 for the rear wheel to the lower plate portion 45 closer to the base 43a than the engagement position of the second power transmission cable 31 for the rear wheel. Device. 2 The ceiling portion 34a of the casing 33 is provided approximately parallel to the upper plate portion 44 of the swing plate 43 in the non-operating position, and the other ends of both first power transmission cables 8 and 9 are provided with the ceiling portion 34a approximately perpendicular to the ceiling portion. The bicycle brake device according to claim 1, characterized in that the bicycle brake device is engaged with the upper plate portion 44 by penetrating through the upper plate portion 44.