JPH0761793B2 - Brake device for bicycle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle brake device including brake levers supported by brackets fixed to both left and right ends of a handle, and front and rear wheel brakes.

[0002]

2. Description of the Related Art Conventionally, in such a braking device,
It is common to operate a rear wheel brake by operating a brake lever provided at the left end of the handle, and to operate a front wheel brake by operating a brake lever provided at the right end of the handle. However, it is inconvenient because only one of the two brakes can be operated by operating one of the brake levers. A brake device for a bicycle has already been proposed in which the brake for a bicycle operates in a stable manner so as to obtain a stable and sufficient braking force.
No. 594).

[0003]

However, some drivers desire to operate the front wheel brakes after the rear wheel brakes have been operated in advance, and it is easy to determine which of the front wheel brake and the rear wheel brake is to be operated first. It is desirable to be able to select arbitrarily by various operations.

The present invention has been made in view of the above circumstances, and operates either the front wheel brake or the rear wheel brake in advance so that the connection state between both brake levers and both brakes can be easily changed. It is an object of the present invention to provide a bicycle brake device that can be arbitrarily selected.

[0005]

In order to achieve the above object, according to a first aspect of the present invention, an upper and a lower support plate portions facing each other with a space therebetween are fixed to a vehicle body frame. An oscillating plate having first, second, and third insertion holes is supported by the supported support frame so as to be oscillatable between an upper braking position and a lower non-braking position, and one of both brackets is supported. The other ends of the first and second outer wires, whose one ends are detachably connected to each other, are detachably connected to the upper support plate portion at positions corresponding to the first and third insertion holes, respectively. The other ends of the third and fourth outer wires whose one end is detachably connected to the lower support plate at a position corresponding to the other end are detachably connected to either the front wheel brake or the rear wheel brake, respectively. Engage one end with one The first inner wire, which is movably inserted in the outer wire and has the first engaging piece at the other end which is engageable with the rocking plate at the non-braking position side, is inserted and removed in the direction orthogonal to the longitudinal direction. Possibly, it has a second engaging piece that is inserted into the upper support plate portion and the swing plate and that is engaged with the swing plate at the braking position side, and the other end is attachable to and detachable from the front wheel or rear wheel brake. The second inner wire, which is connected and movably inserted into the third outer wire, is inserted into and removed from the rocking plate and the lower support plate portion so that the second inner wire can be inserted and removed in the direction orthogonal to the longitudinal direction thereof, and one end of both brake levers is inserted. One in which the third inner wire that is engaged with the other and has the other end removably connected to the brake for the rear wheel or the front wheel and is movably inserted into the second outer wire and the fourth outer wire is orthogonal to the longitudinal direction thereof. A third engaging piece provided on the third inner wire so as to be inserted into and removed from the upper support plate portion, the swing plate and the lower support plate portion so as to engage with the swing plate at the non-braking position side. A spring that exerts a spring force in a direction of separating the third engagement piece from the rocking plate is interposed between and the rocking plate.

According to the second aspect of the present invention, a spring that exerts a spring force in a direction to separate the first engaging piece from the swing plate is interposed between the first engaging piece and the swing plate. To be dressed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a top perspective view of a bicycle, and FIG. 2 is a sectional view showing a connecting structure of both brake levers and both brakes.
3 is a sectional view taken along line 3-3 of FIG. 2, FIG. 4 is a sectional view taken along line 4-4 of FIG. 2, FIG. 5 is a sectional view taken along line 5-5 of FIG. 3, and FIG.
6 is a sectional view taken along line 6, FIG. 7 is a cutaway sectional view showing a connecting structure of a brake lever, a bracket, an outer wire and an inner wire, FIG. 8 is a sectional view taken along line 8-8 of FIG. 7, and FIG. 9 is a brake lever, a bracket, an outer wire and an inner wire. And FIG. 10 are sectional views corresponding to FIG. 2 in a state in which the connection state is changed.

[0008] First, in FIG. 1, the front portion of the body frame 1 in a bicycle, the front wheel caliper brake CB _F for obtaining a braking force by the friction between the rim R _F of the front wheel W _F is attached, the body frame 1 At the rear, wheel caliper brake CB _R after to obtain a braking force by the friction between the rim R _R of the rear wheel W _R is attached. Also body frame 1
A left bracket _BL fixed to the left end of a handle H rotatably supported by the front head pipe 2 in FIG.
A left brake lever L _L is supported on the right bracket B _R so that it can be rotated toward and away from the grip G _L , and a right bracket B _R fixed to the right end of the handle H is attached to the grip G _R. Proximity
The right brake lever L _R is supported so that it can be separated and rotated.

In FIG. 2, front wheel and rear wheel caliper brakes CB _F and CB _R are front wheels W _F and rear wheels W _R.
The straddle manner a pair of operating pieces 10 which is rotatably supported on the body frame 1 _{F, 11 F; 10 R,} 11 R rim R _F, pads 12 that may slidably contacts the side surface of the R _R is attached respectively The return springs 13 _F and 13 _R are interposed between the two operating pieces 10 _F and 11 _F ; 10 _R and 11 _R.

Referring also to FIGS. 3, 4, 5, and 6, a support frame 15 is attached in the middle of the head pipe 2. The support frame 15 is formed in a box shape by fitting a second frame body 17 to a first frame body 16 attached to the head pipe 2. The first frame 16 includes a pair of side plate portions 18 and 19 extending vertically and facing each other, and both side plate portions 18 and 1.
And a mounting plate portion 20 for connecting 9 to each other, and is formed of synthetic resin in a substantially U-shaped cross section. The mounting plate portion 20 is formed in a cylindrical shape surrounding the head pipe 2. A slit 22 extending in the axial direction of the head pipe 2
The mounting portion 21 having is provided integrally. Then, the collar portions 23 and 24 provided on both edges of the slit 22 are attached to the bolt 25.
And the nut 26 to tighten the mounting plate 20
That is, the first frame 16 is fixed to the head pipe 2.
Further, the second frame body 17 includes the side plate portions 18, 1 of the first frame body 16.
The upper support plate portion 28 and the lower support plate portion 29 which are orthogonal to each other and are vertically opposed to each other with a space therebetween, and the upper and lower support plate portions 28 and 29 which are opposed to the mounting plate portion 20 of the first frame body 16. It has a connecting plate part 30 to be connected and is formed of synthetic resin in a substantially U-shaped vertical cross section.

On the inner surface of the connecting plate portion 30 of the second frame body 17, a pair of bearing portions 31, 31 are integrally provided at a distance from each other, and both ends are supported by both bearing portions 31, 31. A base end of a synthetic resin rocking plate 33 is supported by the support shaft 32. Thus, the swing plate 33 has a braking position (position indicated by a chain line in FIG. 2) close to the upper support plate 28 and a non-braking position close to the lower support plate 29 (FIG. 2) in the support frame 15. 2 and the position indicated by the solid line). A first insertion hole 34, a second insertion hole 35, and a third insertion hole 36 are provided in the central portion of the swing plate 33 in the width direction in order from the side of the support shaft 32 along a direction orthogonal to the axis of the support shaft 32. Is provided. Moreover, the first and the third insertion holes 34, 36 are
It is formed with a step with a large diameter on the side. Further, the swing plate 33 has insertion / removal slits 37, 38, 39 in which the inner ends are passed through the respective insertion holes 34 to 36 and the outer ends are opened at the portions facing the side plate portions 19 of the first frame 16. It is provided.

On the other hand, the upper support plate portion 28 is provided with first and second mounting holes 41 and 42 at positions corresponding to the first insertion hole 34 and the third insertion hole 36 of the swing plate 33. , And the insertion / removal slits 45, 46 having the outer ends opened on the same side as the insertion / removal slits 37, 39, with the inner ends communicating with the first and second mounting holes 41, 42. Further, the lower support plate portion 29 is provided with third and fourth mounting holes 43, 44 at positions corresponding to the second insertion hole 35 and the third insertion hole 36 of the swing plate 33, and has inner ends thereof. Insertion / removal slits 47, 48 are provided which communicate with the third and fourth mounting holes 43, 44 and have the outer ends opened on the same side as the insertion / removal slits 38, 39.

Cylindrical first and second receiving members 51, 52 having male threads engraved on their outer surfaces are inserted into the first and second mounting holes 41, 42, and these receiving members 51, 52 are Nuts 55 and 56 that sandwich the upper support plate portion 28 from both sides are screwed together. In addition, the third and fourth mounting holes 43,
Cylindrical third and fourth receiving members 53, 54 having external threads engraved on the outer surface thereof are inserted into the receiving member 44.
54 includes nuts 55, 5 for sandwiching the lower support plate portion 29 from both sides.
6 are screwed together. Therefore, the first and second receiving members 51, 52 are fixed to the upper support plate portion 29 so that their axial positions can be adjusted, and the third and fourth receiving members 5 are provided.
3, 54 are fixed to the lower support plate portion 29 so that their axial positions can be adjusted.

By the way, vertical grooves 57 and 58 are provided on the inner surfaces of the upper support plate portion 28 and the lower support plate portion 29 of the second frame 17 on one side in the width direction, and the upper support plate portion 28 and the lower support plate portion are provided. On the inner surface of the other side in the width direction of 29, slits 45 for insertion and removal,
46; 47, 48 are provided with vertical grooves 59, 60, and the side plate portions 18, 19 of the first frame 16 are provided at their upper end portions with ridges 61, 62 which fit into the vertical grooves 57, 59. Protrusions 63, 6 that are projected and fit into the vertical grooves 58, 60
4 is provided at the lower end. Moreover, claws 65 and 66 that engage with the insertion / removal slits 46 and 48 are provided in the middle of the protrusions 62 and 64.
Is projected. Thus, when the second frame body 17 is fitted to the first frame body 16, the protrusions 6 are formed in the vertical grooves 57, 58, 59, 60.
1, 62, 63, 64 are fitted respectively to the second frame 17
The second frame 17 by pushing the first frame 16 side.
Is bent so that the free ends of the upper support plate portion 28 and the lower support plate portion 29 are separated from each other, and the claws 65 and 66 are engaged with the insertion / removal slits 46 and 48, so that the first The second frame 17 is fitted and fixed to the frame 16. When removing the second frame 16 from the first frame 16, the second frame 1
After bending the free ends of the upper support plate 28 and the lower support plate 29 away from each other to release the engagement of the claws 65 and 66 with the insertion / removal slits 46 and 48, Frame 17
May be pulled out in a direction away from the first frame 16.

Referring also to FIGS. 7 and 8, both brackets B _L and B _R support a pair of support plate portions 70 and 71 that sandwich the base ends of the brake levers L _L and L _R from both sides, and both support plates. A shaft 73 whose both ends are supported by the support plate portions 70 and 71, and a regulating plate portion 72 that connects the plate portions 70 and 71.
Thus, the base ends of the brake levers L _L and L _R are rotatably supported. Thus, the brake levers L _L and L _R are rotatable between a position where they come into contact with the regulation plate portion 72 during a non-braking operation and a position where they come close to the grip portions G _L and G _R according to the braking operation. The restriction plate portion 72 is provided with a hole 74 and a slit 75 that extends linearly in a plane orthogonal to the axis of the shaft 73 such that the inner end is passed through the hole 74 and the outer end is opened. To be

[0016] In FIG. 2 again, the upper support plate 28 at the portion where the other end of the first outer wire 76 which is detachably connected at one end to the right bracket B _R corresponds to the first insertion hole 34 of the swing plate 33 removably The other end of the second outer wire 77, which is movably connected to the left bracket B _{L and} has one end detachably connected, is connected to the upper support plate portion 28 at a position corresponding to the third insertion hole 36. That is, the first and second outer wires 76, 77 are provided with small-diameter fitting cylinders 76a, 77a at one end thereof, and the fitting cylinders 76a, 77a are fitted into the holes 74 to form the first fitting cylinders 76a, 77a. And one ends of the second outer wires 76, 77 are brought into contact with the restriction plate portions 72 of the brackets B _L , B _R , and the other ends of the outer wires 76, 77 are fitted into the first and second receiving members 51, 52, respectively. Are contacted.

Third and fourth outer wires 78, 79 are detachably connected to the lower support plate 29 at positions corresponding to the second and third insertion holes 35, 36. That is, the third
One end of the outer wire 78 is fitted and contacted with the third receiving member 53, and one end of the fourth outer wire 79 is attached to the fourth receiving member 5.
4 is fitted and abutted. Moreover, the other end of the third outer wire 78 is detachably connected to one actuating piece 10 _F of the front wheel caliper brake CB _F , and the fourth outer wire 7
The other end of 9 is detachably connected to one actuating piece 10 _R of the rear wheel caliper brake CB _R.

A first inner wire 81 is movably inserted through the first outer wire 76, and one end of the first inner wire 81 is engaged with the right brake lever L _R. That is, the portion of the right brake lever L _R near the base end is provided with the shaft 7
In the state where the engaging hole 84 having an axis parallel to 3 and the groove 85 communicating with the engaging hole 73 and opened to the regulating plate portion 72 side and the right brake lever L _R are brought into contact with the regulating plate portion 72. A slit 86 that extends substantially parallel to the regulation plate portion 72 and opens the outer end and communicates with the engagement hole 84 and the groove 85 is provided. One end of the first inner wire 81 is fitted into the engagement hole 84. The drum-shaped engaging member 87 is fixed.

The other end of the first inner wire 81 has a first
Penetrates the receiving member 51 and is drawn into the support frame 15,
The oscillating plate 33 is inserted into the first insertion hole 34. Moreover, the first
At the other end of the inner wire 81, a first engaging piece 88 that can be engaged with the swing plate 33 from the non-braking position side, that is, from below is fixed, and the space between the first engaging piece 88 and the swing plate 33 is fixed. Is the first
A first spring 89 that exerts a spring force in a direction of separating the engaging piece 88 from the swing plate 33 is interposed. Thus the first spring 89
Is a coil spring, and a part of the coil spring is fitted to the large diameter side of the first insertion hole 34, which has a large diameter on the lower side and is stepped, and is positioned.

One end portion of the second inner wire 82 is inserted through the second insertion hole 35 of the rocking plate 33, and one end of the second inner wire 82 is engaged with the rocking plate 33 from the braking position side, that is, from above. The mating second engaging piece 90 is fixed. Moreover, the second inner wire 82 is movably inserted through the third receiving member 53 and the third outer wire 78, and the other end of the second inner wire 82 is attached to and detached from the other operating piece 11 _F of the front wheel caliper brake CB _F. Connected as possible.

Second outer wire 77, second receiving member 5
2, the third inner wire 83 is movably inserted through the third insertion hole 36 of the swing plate 33, the fourth receiving member 54, and the fourth outer wire 79, and one end of the third inner wire 83 is
The first inner wire 81 is detachably connected to the left brake lever L _L by the same connecting structure as the right brake lever L _R , and the other end of the third inner wire 83 is attached to the rear wheel caliper brake CB. It is detachably connected to the other operating piece 11 _R in _R. Moreover, the third inner wire 83 is provided with the third engaging piece 91 that engages with the oscillating plate 33 from the non-braking position side, that is, the lower side.
A second spring 92 that exerts a spring force in a direction of separating the third engaging piece 91 from the swing plate 33 is interposed between the engaging piece 91 and the swing plate 33. Thus, the second spring 92 is a coil spring, and is partially positioned on the large diameter side of the third insertion hole 36, which is stepped and has a large diameter on the lower side.

The first and second springs 89 and 92 are partially fitted into the lower portions of the first and third insertion holes 34 and 36, so that the first and third inner wires 81 and 83 have the first and second springs 89 and 92, respectively. The first and third inner wires 8 have a function of preventing their separation from the third insertion holes 34 and 36.
It also has a function of urging both brake levers L _R and L _L toward the brackets B _R and B _L via 1, 83, and a return spring between the brake levers L _R and L _L and the brackets B _R and B _L. It becomes unnecessary to intervene.

Thus, the first and second outer wires 76,
When releasing the connection between 77 and the brackets B _R , B _L and releasing the connection between the first and third inner wires 81, 83 and the brake levers L _R , L _L , as shown in (a) of FIG. 9, the outer wires 76, 77 are pulled in a direction in which one ends of the outer wires 76, 77 are separated from the restriction plate portion 72 of the brackets B _R , B _L , and the fitting cylinder portions 76 a, 77 a are separated from the holes 74. ), One end of each of the first and second inner wires 81, 83 is rotated about the engaging member 87 about 90 degrees to a position where the inner wires 81, 83 correspond to the slit 86. Therefore, as shown in FIG. 9C, the inner wires 81 and 83 may be disengaged from the slit 86, and the engagement member 87 may be disengaged from the engagement hole 84. The first and second outer wires 76 and 77 may be removed.
Can be extremely easily released from the brackets B _R and B _L , and from the first and third inner wires 81 and 83 and the brake levers L _R and L _L. Further, the first and second outer wires 76, 77 are connected to the brackets B _R , B _L , and the first and third inner wires 81, 83 are connected to the brake levers L _R , L _L.
The connection with and may be performed by performing the reverse operation to the above, and this connection operation is also extremely easy.

Next, the operation of this embodiment will be described.
And the left brake lever L while riding on a bicycle_LBlurring
When the brake operation is performed, the third inner wire 83 is pulled.
Rear wheel caliper brake CB_RHas a brake
Operate, first the rear wheel W_RThe braking force can be obtained with. Moreover, the third
The third engaging piece 91 moves to the second position in response to the pulling of the inner wire 83.
Engage the swing plate 33 from below while shrinking the spring 92
Therefore, the swing plate 33 is braked by the third engagement piece 91.
The second engaging piece 90 is moved by swinging to the position side.
The second inner wire 82 is pulled through the
Front wheel caliper brake CB_FBrakes, front wheels
The braking force can be obtained with. That is, the left brake
Bar L_LBy first operating the brakes, the rear wheel caliper
Rake CB _RBrakes first, and later
Front wheel caliper brake CB_FThe brake operates
become.

When the right brake lever L _R is operated for braking, the first inner wire 81 is pulled and the first engaging piece 88 contracts the first spring 89 to cause non-braking of the rocking plate 33. From the position side, the rocking plate 33 is rockingly driven to the braking position side. Thus was the second engaging piece 90 second inner wire 82 is to be towed according to the swing of the braking position side of the swing plate 33, a front wheel caliper brake CB _F is braked. At this time, since the swing plate 33 is swung in a direction away from the third engaging piece 91, never traction third inner wire 83 acts, the rear wheel caliper brake CB _R is actuated brakes Absent.

That is, in response to the operation of the left brake lever L _L , the rear wheel caliper brake CB _R precedes the brake operation, and then the front wheel caliper brake CB _F operates and the right brake lever L _R operates. only the front wheel caliper brake CB _F is to be braked.

By the way, depending on the driver's operation of the right brake lever L _R , the front wheel caliper brake CB _F
And then the rear-wheel caliper brake CB _R is activated, and the left brake lever L _L
May wish to allowed to braking only rear wheel caliper brake CB _R in accordance with the operation.

[0028] In this case, as shown in Figure 10, between the left bracket B _L and the upper support plate 28 connected by the first outer wire 76 ', right Burakketo B _R and the upper supporting plate portions between 28 second 'connected by, between one operating piece 10 _R and the lower support plate portion 29 at the rear end caliper brake CB _R 3 outer wire 78' outer wire 77 connected by,
One operation piece 1 in front wheel caliper brake CB _F
The fourth outer wire 79 ′ is provided between the 0 _F and the lower support plate portion 29.
And the first engaging piece 88 at the other end of the first inner wire 81 ′ that is movably inserted into the first outer wire 76 ′ by engaging one end with the left brake lever L _L.
A second engaging engagement with the oscillating plate 33 via the spring 89 from the non-braking position side and engagement with the oscillating plate 33 on the braking position side.
The engagement piece 90 other operating piece 11 in the caliper brake CB _R for the rear wheels and the other end of the 'second inner wire 82 which is movably inserted into' second outer wire 78 having at one end a
Linked to _R, the third inner wire 8 having one end connected to the other operating piece 11 _F and the other end in the front-wheel caliper brake CB _F with engaged on the right brake lever L _R
3'is movably inserted into the second outer wire 77 'and the fourth outer wire 79', and the third engaging piece 91 provided at the intermediate portion of the third inner wire 83 'is not connected via the second spring 92. The swing plate 33 is engaged from the braking position side.

Each of the outer wires 76 'to 7'
9'and the outer wires 76 to 79 shown in FIG. 2 and the inner wires 81 'to 83' and the inner wires 81 to 83 shown in FIG. 2 are replaced by the first and second mounting holes 41, 42 insertion / removal slits 45, 4 leading to 42
6 is provided on the upper support plate portion 28, and the first to third insertion holes 34 are provided.
Up to 36, the insertion / removal slits 37 to 39 are attached to the swing plate 33.
Since the insertion / removal slits 47, 48 which are provided on the lower support plate portion 29 and which communicate with the third and fourth mounting holes 43, 44 are provided on the lower support plate portion 29, the second frame body 17 is removed from the first frame body 16 Very easy to do. That is, the first receiving member 5
In the state where the connection with the upper support plate 28 of No. 1 is released,
It is easy to insert and remove the upper support plate portion 28 and the swing plate 33 of the first inner wires 81, 81 ', and the third receiving member 5
In the state in which the connection with the lower support plate portion 3 of 3 is released,
It is easy to insert and remove the second inner wires 82, 82 ′ with respect to the swing plate 33 and the lower support plate portion 29, and to connect the second support member 52 to the upper support plate portion 28 and the fourth support member 5.
In the state in which the connection with the lower support plate portion 29 of No. 4 is released, the upper support plate portion 2 of the third inner wires 83, 83 '
8, it is easy to insert and remove the swing plate 33 and the lower support plate portion 29.

Further, in FIG. 2, the first outer wire 76
To left bracket B_LThe first Inner Wai
Ya 81 left brake lever L_LEngage the second outer wheel
Ear 77 to right bracket B_RAnd connected to
The inner wire 83 to the right brake lever L_RTo engage
Is also possible, in which case the right brake lever L_RNobu
Rear wheel caliper brake CB depending on rake operation_RFirst
The caliper brakes for the front wheels after running and braking
CB_FBrake the left brake lever L_LManipulation of
Front wheel caliper brake CB depending on the product_FOnly break
It can be operated, and in FIG.
1 Outer wire 76 'to right bracket B _RWhen linked to
In both cases, the first inner wire 81 'is connected to the right brake lever L._R
And attach the second outer wire 77 'to the left bracket B._L
And connect the third inner wire 83 'to the left breaker.
Kirever L_LIt is also possible to engage with and
And the left brake lever L_RDepending on the brake operation of the front wheels
Caliper brake CB_FTo activate the brake first
After the rear caliper brake CB_RThe brake is activated
Right brake lever L_RCarry for the rear wheels depending on the operation of
Pabrake CB_FOnly the brake can be activated.
Wear.

In the above embodiments, the front wheel and rear wheel brakes are used.
Caliper brake CB as rake _F, CB_RUsed
Although the brake device has been described, the present invention is not limited to the band brake.
Bicycle braking device using rake and cantilever brakes
Is also applicable.

[0032]

As described above, according to the first aspect of the present invention, the first and second outer wires are connected to both brackets, and the third and fourth outer wires are connected to both brakes. An inner wire connecting with both brake levers, a second inner wire connecting with both brakes,
Also, by changing the both brake levers of the third inner wire and the connection mode with the both brakes, both brakes can be operated while the same support frame and rocking plate are used, while the rear wheel side is advanced by the operation of one brake lever. It is possible to switch between the state in which the brake is operated and the state in which both brakes are operated while the front wheel side is ahead by operating the other brake lever, and the switching operation is extremely easy because the outer wires and inner wires can be easily attached and detached. Can be done

Further, according to the second feature of the present invention, it is possible to contribute to reduction in the number of parts by eliminating the need for providing a return spring between the brake lever and the bracket.

[Brief description of drawings]

FIG. 1 is a top perspective view of a bicycle.

FIG. 2 is a cross-sectional view showing a connecting structure of both brake levers and both brakes.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

4 is a sectional view taken along line 4-4 of FIG.

5 is a sectional view taken along line 5-5 of FIG.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is a cutaway sectional view showing a connecting structure of a brake lever, a bracket, an outer wire and an inner wire.

8 is a sectional view taken along line 8-8 of FIG.

FIG. 9 is a view sequentially showing a process of attaching and detaching the brake lever and the bracket to the outer wire and the inner wire.

10 is a cross-sectional view corresponding to FIG. 2 in a state where the connection state is changed.

[Explanation of symbols]

1 Body Frame 15 Support Frame 28 Upper Support Plate Part 29 Lower Support Plate Part 33 Swing Plate 34 First Insertion Hole 35 Second Insertion Hole 36 Third Insertion Hole 76, 76 'First Outer Wire 77, 77' Second Outer Wire 78 , 78 'Third outer wire 79, 79' Fourth outer wire 81, 81 'First inner wire 82, 82' Second inner wire 83, 83 'Third inner wire 88 First engaging piece 89, 92 Spring 90 Second engaging piece 91 third engagement piece B _L, B _R bracket CB _F front wheel caliper brake CB for _R rear wheel caliper brake H handle L _L, L _R brake lever

Claims (2)

[Claims] 1. A bracket (B _L, B _R) fixed to the left and right ends of the handle (H) brake lever is supported, respectively _(L L, L _R) and front-wheel and rear-wheel brake (CB _F, CB _R) and a bicycle brake device comprising mutually have upper and lower support plate portions facing (28, 29) at intervals is fixed to the body frame (1) a support frame (15 ), A rocking plate (33) having first, second and third insertion holes (34, 35, 36) is supported so as to rock between an upper braking position and a lower non-braking position. And one end of each of the brackets ( _BL , _BR ) is detachably connected to the first and second brackets.
The other ends of the outer wires (76, 76 '; 77, 77') are detachably connected to the upper support plate portion (28) at positions corresponding to the first and third insertion holes (34, 36), respectively. And third and fourth outer wires (78, 78 '; 79, 7) whose one ends are detachably connected to the lower support plate (29) at positions corresponding to the third insertion holes (35, 36).
The other end of 9 ') has brakes for front wheels and rear wheels (CB _F ,
CB _R ), and one end of which is engaged with one of both brake levers (L _L , L _R ) and is movably inserted into the first outer wire (76, 76 ′). A first inner wire (81, 81 ') having a first engaging piece (88) engageable with the oscillating plate (33) at the non-braking position side at the other end is inserted in a direction orthogonal to the longitudinal direction thereof. The upper support plate portion (28) and the swing plate (3
3) has a second engagement piece (90) which is inserted into the rocking plate (33) at the braking position side at one end and the other end at the front wheel or rear wheel brake (CB _F , CBR _R). ) Is detachably connected to the third outer wire (78, 78 ')
The second inner wire (82, 8) movably inserted into the
2 ') is inserted into and removed from the rocking plate (33) and the lower support plate portion (29) in a direction orthogonal to the longitudinal direction, and one end of both brake levers (L _L , L _R ) is inserted. the other end the rear wheel or front wheel brake with engaged on the other (CB _R, CB _F) second outer wire is detachably coupled to the (77, 77 ') and the fourth outer wire (7
The third inner wire (83, 83 ') movably inserted through the upper support plate portion (28) and the swing plate (83, 83') enables the insertion / removal operation in the direction orthogonal to the longitudinal direction. Three
3) and the lower support plate portion (29), and the third inner wire (8) for engaging the swing plate (33) at the non-braking position side.
The third engaging piece (91) provided on the rocking plate (3) is provided between the third engaging piece (91) and the rocking plate (33).
3) A spring (92) that exerts a spring force in a direction away from
A brake device for a bicycle, characterized in that: 2. A first engagement piece (88) and a swing plate (3).
The spring (89) for exerting a spring force in a direction of separating the first engagement piece (88) from the swing plate (33) is interposed between the 3) and the third engagement piece (88). Brake device for bicycles.