JP3141535U - Brake device - Google Patents

Abstract

A brake device that contributes to simplification and individualization of the design of a bicycle and can ensure the safety of a bicycle user.
A first lever 4 and a second lever 5 that are operated at the time of braking, and a bracket 3 attached to the handle 2. The first lever is rotatably supported by the bracket and has a rotation center. The end of the outer wire 50 is formed so as to be held back and pushed away from the position, and the second lever is rotatably supported by the bracket and the first lever holds the outer wire. It is formed so that it can be pulled while holding the end of the inner wire 41 at a position away from the center of rotation, and the bracket prevents the first lever from rotating in the direction of pulling the outer wire. The brake device which has the 1st latching | locking part 16 and the 2nd latching | locking part 17 which stops that a 2nd lever rotates in the direction which pushes back an inner wire.
[Selection] Figure 3

Description

  The present invention relates to a brake device used in a bicycle brake system.

In recent years, a bicycle delivery service from the United States called a messenger has been spreading as a new delivery service, mainly in large cities in Japan. The messenger uses a bicycle that does not have a freewheel function with a fixed gear as a transportation tool, and makes it possible to deliver more quickly by taking advantage of the convenience of the bicycle even in traffic jams.
With the generalization of messengers, among young people, the bicycles used by messengers are beginning to spread as single-speed bikes (bicycles without gearboxes), and as a result, demand for bicycles with simplified specifications is increasing. Is growing.

In addition to simplification of bicycle specifications, interest in bicycle design is also increasing, and young people who can ride on skateboards, roller skates, etc. ride bicycles without wearing brakes because they dislike wearing brake devices. However, troubles leading to traffic accidents are starting to occur frequently.
By the way, conventionally, various brake devices for bicycles have been proposed (Patent Documents 1 to 4).
JP-A-6-16170 Japanese Patent Laid-Open No. 8-119177 Japanese Patent Laid-Open No. 9-24848 Japanese National Patent Publication No. 10-504089

The brake devices proposed in Patent Documents 1 to 4 have been devised so that the speed change operation of the gear device can be performed smoothly (Patent Document 1), and the brake device can be safely locked by preventing the brake from being locked. (Patent Document 2), a brake device attached to a protrusion provided separately from the handle to improve the operability of the brake device (Patent Document 3), and a brake operation feeling intended by the rider of the brake device can be obtained. It is what I did.
However, the brake devices proposed in Patent Documents 1 to 4 do not follow the simplification and individualization of the design of the entire bicycle as desired by young people in recent years, and do not reduce the resistance to brake mounting.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a brake device that contributes to simplification and individualization of a bicycle design and can ensure the safety of a bicycle user.

In order to achieve the above object, the following technical means were taken in the present invention.
That is, the brake device according to the present invention is a brake device attached to a handle for operating a brake device for braking a bicycle wheel via an inner wire and an outer wire, and is a first lever operated during braking. And a second lever, and a bracket for attaching the first lever and the second lever to the handle, the first lever being rotatably supported by the bracket, and from a rotation center The end of the outer wire is locked at a distant position so that the outer wire can be pushed back, and the second lever is rotatably supported by the bracket, and the first lever When the end of the outer wire is locked, the end of the inner wire is moved away from the center of rotation. Seals are formed to be capable of pulling the inner wire to the bracket,
A first locking portion for locking the first lever and preventing the first lever from rotating in a direction of pulling the outer wire; and locking the second lever. A second locking portion for stopping the second lever from rotating in a direction to push back the inner wire.

Preferably, the first lever and the second lever have a common rotation axis, and one of the first lever and the second lever is a portion around the other rotation axis. Is provided with a lever receiving hole.
The first lever rotates in a direction to push back the outer wire when a first operating portion operated by a person is pulled toward the handle side, and the second lever is a second operated by a person. When the operating portion is pulled toward the handle, the inner portion is configured to rotate in a pulling direction.

Preferably, both of the first operation portion and the second operation portion are formed so as to extend along the handle, and one of the first operation portion and the second operation portion is longer than the other.
In the above description, the first lever is used to lock the end of the outer wire, and the second lever is used to lock the end of the inner wire. The relationship between the end of the first lever that allows the first lever to push back the outer wire widely, including the “gripping” and the like, and the second lever that allows the second lever to pull the inner wire The relationship between the end of the lever and the inner wire shall be used.

  ADVANTAGE OF THE INVENTION According to this invention, the brake device which contributes to simplification of a bicycle design and individualization, and can ensure the safety | security of a bicycle user can be provided.

FIG. 1 is a schematic view of the brake device 1 attached to the handle 2, FIG. 2 is a perspective view of each component in the brake device 1, and FIGS. 3 and 4 are views showing the operation of the brake device 1 accompanying a braking operation.
The brake device 1 includes a bracket 3, a large lever 4, a small lever 5, and the like.
The bracket 3 includes a lever holding part 6 and a clamping part 7.
The lever holding portion 6 is formed by a handle gripping portion 8 having a shape similar to that obtained by dividing a cylinder by an axial center and a lever pivoting portion 9.

The handle gripping portion 8 has a radius of curvature of the inner surface 10 substantially equal to the radius of the outer periphery of the handle 2 to be attached. The handle gripping portion 8 is thick at both the half ends, and one end edge thereof has a rectangular recess 11 at the center. The protruding portions on both sides that form the concave portion 11 are provided with holes 12 and 12 that share the respective shaft centers and penetrate in the axial direction. Further, a hole is provided in the other thick part at the half end in a direction perpendicular to the axis, and the hole is provided with a female screw 13.
The lever pivot 9 extends from the half end of the handle grip 8 on the side where the female screw 13 is provided, in a direction perpendicular to the inner axis of the cylinder and in a direction perpendicular to the axis of the inner surface 10. It is formed by two plate-like bodies 14 and 14 spaced apart from each other. The two plate-like bodies 14 and 14 are provided with pivot shaft holes 15 and 15 having the common center. The large lever locking portion 16 and the small lever locking portion 17, which are concave in the axial direction on both sides in the axial direction of the plate-like bodies 14, 14 in the immediate vicinity of the handle gripping portion 8, are both surfaces facing outward in the axial direction. Is provided.

  Similar to the handle gripping portion 8, the holding portion 7 has a shape similar to that obtained by dividing a cylinder by an axis. The curvature radius of the inner surface 18 of the sandwiching portion 7 is substantially equal to the radius of the outer periphery of the handle 2 to be attached. As for the clamping part 7, all the half ends are thick. At one of the half ends of the sandwiching portion 7, a rectangular projecting convex portion 19 that can be easily fitted into the concave portion 11 of the handle gripping portion 8 is provided. The convex part 19 is provided with a hole 20 that penetrates in the axial direction of the inner surface. A hole is provided in the other thick part of the half end of the clamping portion 7 in a direction perpendicular to the axis, and the hole is provided with a female screw 21.

The large lever 4 includes a first operation unit 22 and a first operation unit 23. The first operation section 22 is a rod-shaped portion that is directly operated when a bicycle driver tries to brake. The 1st operation part 22 has a moderate curve so that braking operation may be performed reliably.
The first operation unit 23 is a part for transmitting the operation to the brake wire 24 when a braking operation is performed on the first operation unit 22. The first operation unit 23 is continuous with the first operation unit 22 and extends in a substantially right angle direction with respect to the first operation unit 22 extending in a rod shape. The first operating portion 23 is slightly smaller than the distance between the two plate-like bodies 14, 14 to such an extent that the thickness of the first operating portion 23 is accommodated between the two plate-like bodies 14, 14 in the lever pivot 9. Further, the first operation unit 23 penetrates from the side continuous with the first operation unit 22 to the opposite side, and the thickness direction (the direction in which the first operation unit 22 extends and the direction in which the first operation unit 23 extends). A small lever accommodating hole 25 having a surface facing in parallel with each other in a direction orthogonal to each other is provided. Large lever rotating holes 27 and 27, which are through holes having a common axis in the thickness direction, are formed on both side walls 26 and 26 forming surfaces facing the thickness direction in the small lever accommodating hole 25. Is provided. The small lever accommodating hole 25 is formed between the walls 26 and 26 on both sides (the distance between the opposing surfaces) so as to be able to pass through the second operating portion 34 of the small lever 5 described later. It is slightly larger than the thickness of 34.

  A first engagement protrusion 28 having a rectangular cross section that protrudes in the direction in which the first operation part 23 extends is provided at the tip of the first operation part 23. The first engagement protrusion 28 has a first engagement surface 29 that is a surface that engages with the large lever locking portion 16 of the bracket 3 on the first operation portion 22 side. Further, a quadrangular pyramid-shaped outer holding portion 30 protrudes on a surface opposite to the first operation portion 22 in the vicinity of the tip of the first operation portion 23. The outer holding portion 30 is provided with an inner through hole 31 that passes through a quadrangular pyramid-shaped axis and reaches the small lever housing hole 25. In addition, since the end part of the outer end cap 32 in the brake wire 24 is accommodated in the vicinity of the opening portion on the outer holding portion 30 side in the inner through hole 31, the inner diameter is large.

The small lever 5 includes a second operation unit 33 and a second operation unit 34. Similar to the first operation unit 22, the second operation unit 33 is a rod-shaped part that is directly operated when a bicycle driver tries to brake. The 2nd operation part 33 has a moderate curve so that braking operation may be performed reliably. The second operation unit 33 is shorter than the first operation unit 22.
The second operation unit 34 is a part for transmitting the operation to the brake wire 24 when a braking operation is performed on the second operation unit 33. The second operation unit 34 is continuous with the second operation unit 33 and extends in a substantially right angle direction with respect to the second operation unit 33 extending in a bar shape. A portion where the second operation unit 33 and the second operation unit 34 are continuous (substantially orthogonal) is orthogonal to both the direction in which the second operation unit 33 extends and the direction in which the second operation unit 34 extends. A small lever rotation hole 35 which is a hole penetrating in the direction is provided.

  A second engagement protrusion 36 having a rectangular cross section that protrudes in the direction in which the second operation portion 34 extends is provided at the tip of the second operation portion 34. The second engagement protrusion 36 has a second engagement surface 37 that is a surface that engages with the small lever locking portion 17 of the bracket 3 on the second operation portion 33 side. Further, the second operating portion 34 has a concave portion on the surface opposite to the second operating portion 33 in the vicinity of the tip thereof and having a semicircular curved surface with a semicircular bottom at the back and capable of accommodating the tyco 38 of the brake wire 24. This is a Tyco container 39. The second operating portion 34 has an inner mounting groove 40 that is a groove that bisects the tip of the second engaging protrusion 36 to the middle of the Tyco accommodating portion 39 in the axial direction of the small lever rotation hole 35. ing. The width of the inner mounting groove 40 is slightly larger than the thickness of the inner wire 41 in the brake wire 24.

Next, a method for attaching the brake device 1 to the handle 2 will be described.
First, spacers 42 and 42 having through holes are fitted into openings on both sides of the small lever rotation hole 35 of the small lever 5. The spacer 42 is for realizing smooth rotation of the small lever 5 in the small lever accommodating hole 25 of the large lever 4. The spacer 42 is made of metal, but may be made of a self-lubricating fluororesin or self-lubricating ceramic.
In the small lever 5 in which the spacers 42 and 42 are fitted in the small lever rotation hole 35, the second operating portion 34 is fitted through the small lever accommodating hole 25 of the large lever 4. At this time, the first operation unit 22 and the second operation unit 33 are arranged to extend in opposite directions. Spacers 43 and 43 having through holes are fitted into the large lever rotation holes 27 and 27 from the outside. The spacer 43 is the same as the spacer 42 fitted in the small lever rotation hole 35 of the small lever 5. The spacers 43 are for smoothly rotating the large lever 4 pivotally supported by the lever pivot 9 of the bracket 3.

  In the large lever 4 in which the second operating portion 34 of the small lever 5 is fitted in the small lever accommodating hole 25, the first operating portion 23 is located between the plate-like bodies 14, 14 of the lever pivot 9 in the bracket 3. Be contained. The shafts 15 and 15 of the plate bodies 14 and 14, the through holes of the spacers 43 and 43, the large lever rotation holes 27 and 27, the spacers 42 and 42, and the small lever rotation hole 35 are aligned. After that, the headed blind nut 44 is inserted from one of the holes communicating with them. The inserted blind nut 44 with a head is firmly screwed with a bolt 45 inserted from the other side of the hole. By these operations, the bracket 3, the large lever 4 and the small lever 5 are integrated.

Hereinafter, the headed blind nut 44 may be referred to as a rotation shaft 44.
For the integration of the lever holding portion 6 and the holding portion 7 of the bracket 3, first, the convex portion 19 in the holding portion 7 is fitted into the concave portion 11 in the lever holding portion 6, and the holes 12, 12 of the concave portion 11 and the convex portion 19 are The axis of the hole 20 is aligned. Subsequently, the grooved flat head pin 46 is inserted from one hole 12 of the recess 11, and the E-ring 47 is fitted into the groove at the tip that has come out of the other hole 12. The lever holding part 6 and the clamping part 7 are integrated by a grooved flat head pin 46 and an E ring 47 so as to be relatively rotatable around the grooved flat head pin 46.

The brake device 1 assembled in this way is fixed in the immediate vicinity of the stem 48 of the handle 2 fixed to the stem 48. The brake device 1 is fixed to the handle 2 by sandwiching the handle 2 between the handle gripping portion 8 and the sandwiching portion 7 and screwing a bolt 49 to the female screw 21 of the sandwiching portion 7 and the female screw 13 of the handle gripping portion 8. This is done by tightening tightly.
The brake device 1 is attached to the handle 2 by the above operation.
When the brake wire 24 is attached to the brake device 1, first, the tip of the inner wire 41 extracted from the outer wire 50 on the side opposite to the tie 38 is placed in the inner through hole 30 of the large lever 4 and the outer holding portion. 30 is inserted from the opposite side. The tip of the inner wire 41 is drawn out from the opening of the outer holding portion 30 in the inner through hole 30 and inserted into the outer end cap 32 and the outer wire 50. Thereafter, the end of the inner wire 41 on the side of the tyco 38 is guided through the inner mounting groove 40 of the small lever 5 to guide the tyco 38 to the tyco accommodating portion 39.

Finally, a braking device such as a brake shoe operating device for braking the front wheel, for example, for braking the front wheel, is attached to the bicycle with the tip of the inner wire 41 and the tip of the outer wire 50 passed through the outer end cap 32 and the outer wire 50. Connected to.
In the brake device 1 to which the brake wire 24 is attached, the large lever 4 is rotatably supported by the bracket 3 by the blind nut 44 with a head, and is located away from the rotation center (rotation shaft holes 15, 15). The end portion of the outer wire 50 is locked to the outer wire 50 so that the outer wire can be pushed back. Similarly to the large lever 4, the small lever 5 is also rotatably supported by the bracket 3 by the headed blind nut 44, and is located away from the rotation center when the large lever 4 holds the end of the outer wire 50. The end portion of the inner wire 41 is locked to the inner wire 41 so that the inner wire 41 can be pulled.

Next, the function of the brake device 1 will be described.
Referring to FIG. 3, when a braking operation is performed by the large lever 4, the large lever 4 rotates around the rotation shaft 44 and is pulled toward the handle 2 side. The first operating portion 23 of the large lever 4 rotates in a direction away from the second operating portion 34 of the small lever 5 and pushes the outer end cap 32 and the outer wire 50 toward the braking device. At this time, in the second operating portion 34 of the small lever 5 provided with the Tyco accommodating portion 39 for accommodating the Tyco 38, the second engaging surface 37 of the second engaging projection 36 is locked to the small lever locking portion 17. The Accordingly, the movement of the inner wire 41 accompanying the outer wire 50 or the like is restricted. As a result, the brake wire 24 is in the same state as the inner wire 41 is pulled out, and the braking device starts a braking operation.

That is, when the large lever 4 is operated and the outer wire 50 is pushed back to the braking device side, the small lever locking portion 17 in the bracket 3 prevents the small lever 5 from rotating in a direction to push back the inner wire 41. To do.
Referring to FIG. 4, when a braking operation is performed by the small lever 5, the small lever 5 rotates around the rotation shaft 44 and is pulled toward the handle 2 side. In the large lever 5, the first engagement surface 29 of the first engagement protrusion 28 at the tip of the first operating portion 23 is locked to the large lever locking portion 16, and the accompanying to the small lever 5 is prevented. Therefore, the second operating portion 34 of the small lever 5 rotates in a direction away from the first operating portion 23 of the large lever 4, and the inner wire 41 is pulled out by the Tyco accommodating portion 39 that accommodates the Tyco 38. With this operation, the braking device starts a braking operation.

That is, when the small lever 5 is operated and the inner wire 41 is rotated in the pulling direction with respect to the braking device, the large lever locking portion 16 in the bracket 3 rotates in the direction in which the large lever 4 pulls the outer wire 50. Stop moving.
As described above, the brake device 1 can operate the braking device regardless of which of the large lever 4 and the small lever 5 is operated. As shown in FIGS. 3 and 4, even if the brake device 1 is attached near the stem 48, the braking operation can be performed safely without releasing the hand from the handle 2. Since the brake device 1 can be mounted near the stem 48, the design around the handle 2 can be simplified as compared with the conventional brake lever.

FIG. 5 is a perspective view of the large lever 4B and the small lever 5B in another embodiment.
Rather than accommodating one operating part of the large lever 4 and the small lever 5 in the other operating part as in the brake device 1, when the overlapping parts of the operating parts are halved and overlapped, You may comprise the large lever 4 and the small lever 5 so that it may become the thickness in the action | operation part 23 of the large lever 4. FIG. The large lever 4B and the small lever 5B in FIG. 5 are configured as described above.
The large lever 4B and the small lever 5B are both cut off on the same side as viewed from the first operating portion 23B and the second operating portion 34B. This range to be cut is a range that does not hinder the operation of the large lever 4 and the small lever 5 shown in FIGS.

Parts of the large lever 4B and the small lever 5B having the same configuration as the large lever 4 and the small lever 5 are denoted by the same reference numerals as those of the large lever 4 and the small lever 5 in FIG. To do.
In the above-described embodiment, the outer end cap 32 or the outer wire 50 may be directly locked by the first operating portions 23 and 23B without providing the outer holding portion 30 on the large levers 4 and 4B. A brake wire that does not have the outer end cap 32 may be used. The large levers 4, 4 </ b> B may not be provided with the first engagement protrusions 28, but the side surfaces of the first operating portions 23, 23 </ b> B on the first operation portion 22 side may be locked by the large lever locking portions 16. Similarly, the second engaging protrusion 36 is not provided on the small levers 5 and 5B, and the side surfaces of the second operating portions 34 and 34B on the second operating portion 33 side are locked to the small lever locking portion 17. You can also. You may hold | maintain the Tyco 38 of the 2nd operation | movement parts 34 and 34B by the method different from the Tyco accommodating part 39. FIG.

  The large levers 4 and 4B and the small levers 5 and 5B cause the first operating parts 23 and 23B to lock or push the outer wire 50 side, and the second operating parts 34 and 34B to lock or pull the inner wire 41 side. However, the first operating parts 23 and 23B are changed so that the inner wire 41 side is locked or pulled out, and the second operating parts 34 and 34B are locked or pushed out. However, the same functions and effects as the brake device 1 can be obtained. In that case, the left and right positions of the large lever 4 and the small lever 5 in FIG. 1 are reversed.

Further, in the brake device 1, the small lever accommodating hole 25 that allows the second lever 34 of the small lever 5 to pass through the large lever 4 is provided. However, the small lever 5 allows the first lever 23 to penetrate the large lever 4. A hole may be provided. In the brake device 1, the length relationship between the first operation portion 22 of the large lever 4 and the second operation portion 33 of the small lever 5 is reversed. The lengths of the first operation unit 22 and the second operation unit 33 may be substantially the same. The lengths of the first operation unit 22 and the second operation unit 33 are determined for convenience from the difference in distance from the grip of each handle 2.
In the above description, the rotation shafts 44 of the large lever 4B and the small lever 5B are common, but the rotation shafts of the large lever 4B and the small lever 5B may be different.

  In addition, each structure of the brake device 1 and the brake device 1 or the overall structure, shape, dimensions, number, material, and the like can be appropriately changed in accordance with the spirit of the present invention.

  The present invention can be used in a brake device used in a bicycle brake system.

FIG. 1 is a schematic view of a brake device attached to a handle. FIG. 2 is a perspective view of each component in the brake device. FIG. 3 is a diagram illustrating the operation of the brake device in accordance with the braking operation. FIG. 4 is a diagram showing the operation of the brake device accompanying the braking operation. FIG. 5 is a perspective view of a large lever and a small lever according to another embodiment.

Explanation of symbols

1 Brake device 2 Handle 3 Brackets 4 and 4B First lever (large lever)
5,5B Second lever (small lever)
16 First locking part (large lever locking part)
17 Second locking part (small lever locking part)
22 1st operation part (1st operation part)
25 Lever receiving hole (small lever receiving hole)
33 Second operation unit (second operation unit)
41 Inner wire 50 Outer wire

Claims (4)

A brake device attached to a handle for operating a braking device for braking a bicycle wheel via an inner wire and an outer wire,
A first lever and a second lever operated during braking, and a bracket for attaching the first lever and the second lever to the handle;
The first lever is
It is rotatably supported by the bracket, and is formed so that the outer wire can be pushed back by locking the end of the outer wire at a position away from the rotation center.
The second lever is
When the first lever locks the end of the outer wire, the end of the inner wire is locked at a position away from the center of rotation when the first lever locks the end of the outer wire. Formed to be able to pull
The bracket is
A first locking portion for locking the first lever and preventing the first lever from rotating in a direction of pulling the outer wire;
A brake device, comprising: a second locking portion for locking the second lever and preventing the second lever from rotating in a direction to push back the inner wire. The first lever and the second lever have a common rotation axis,
The brake device according to claim 1, wherein either one of the first lever and the second lever is provided with a lever accommodation hole that accommodates a portion around the rotation axis of the other. The first lever rotates in a direction to push back the outer wire when a first operation unit operated by a person is pulled toward the handle side,
The said 2nd lever was comprised so that it might rotate in the direction which pulls the said inner wire, when the 2nd operation part which a person operates is pulled near to the said handle | steering-wheel side. Brake device. Both the first operation part and the second operation part are formed so as to extend along the handle,
The brake device according to claim 3, wherein either one has a longer length than either one.

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