JP5574300B2 - Bicycle brake, bicycle - Google Patents

Description

  The present invention relates to a bicycle brake applied to a bicycle and a bicycle equipped with the bicycle brake.

  2. Description of the Related Art Conventionally, a bicycle brake applied to a bicycle is known in which a brake shoe is pressed against a rim of a wheel and the wheel is braked with the frictional force thereof. This type of bicycle brake is configured to pull the brake wire based on the operation of pulling the lever provided on the handle toward you, and press the brake shoe against the wheel (rim) in conjunction with the pulling operation of the brake wire. (For example, Patent Document 1 below).

Japanese Patent Laid-Open No. 08-119177

  However, pulling the lever to the front is difficult for people with weak grip, and in situations where the brake operation of the heel is forced, the finger holding the handle is instantly hooked on the lever and pulled to the front. An operation will be required.

  The present invention has been made paying attention to such a problem, and the main purpose thereof is a bicycle brake that is excellent in operability and does not require a conventional operation of placing a finger on a lever and pulling it forward. And providing a bicycle with such a bicycle brake.

  That is, the present invention includes a braking force acting state in which a braking force is applied to a wheel by pulling a wire and pressing a brake shoe against the wheel of the bicycle, and a braking force release in which the braking force is released by stopping or weakening the traction force of the wire. The present invention relates to a bicycle brake that can be switched between states.

The bicycle brake according to the present invention includes a base cylindrical body that has a long hole extending in the axial direction that coincides with the longitudinal direction and that is not rotatable, and an inner portion of the base cylindrical body that holds one end of the wire. A slider housed in the slider, a projecting portion provided on the outer peripheral surface of the slider, and a slider that can move forward and backward in the axial direction of the base cylindrical body while guiding the projecting portion in the elongated hole, and a base tube A rotating cylindrical body that is rotatable in a state of covering the cylindrical body , a cap attached to an end of the base cylindrical body, and a single urging means . The bicycle brake of the present invention is formed integrally with the handlebar as a base cylindrical body, and the region extending from the wire insertion hole formed in the vicinity of the central portion in the longitudinal direction of the wire to the slider is different in the base cylindrical body. What is accommodated in a state where it is not in contact with the member is applied, and is arranged as a single biasing means between the cap and the advancing / retracting movable body and moving the advancing / retreating movable body from the braking force release state to the braking force acting state. Applying a biasing force in the direction opposite to the direction of the traction force of the wire at the time of switching, the part where the biasing means hits each of the cap and the advancing / retracting movable body is set to a flat surface perpendicular to the axial direction, and the rotating cylinder as Jo body, applying those having a spiral bore which serves a protrusion in accordance with the rotation operation as a guide portion for advancing and retracting in the axial direction of the base tubular body along the long hole, a single on the tip portion of the projecting portion Mounting a bearing rotatably, a rotating tubular body on the basis of the operating force of rotating in a predetermined direction, the spiral hole of the projection in a state of being spliced to a single bearing the long hole and spiral hole and the elongated hole The movable body moves forward and backward in the axial direction of the base cylindrical body against the urging force of the urging means and pulls the wire to switch from the braking force release state to the braking force acting state. The slider is configured so that the outer diameter at both axial ends is set slightly smaller than the inner diameter of the base cylindrical body, and the outer diameter at the axial central portion is set smaller than the outer diameter at both axial ends. Then, both end portions in the axial direction are in contact with or close to the inner peripheral surface of the base cylindrical body, and the central portion in the axial direction is moved in the axial direction in the base cylindrical body with no contact with the inner peripheral surface of the base cylindrical body. der those that is, the slide A projecting part is attached to one end of the two axial ends of the rotor that the urging member contacts, a wire is held at the other end, and the movable body is moved from the normal position when the braking force is released. toward the pulling direction of the wire, that you have set so that the braking force acting state when moving a short predetermined distance than a distance corresponding to the dimension along the axial direction of the long hole and spiral hole It is a feature.

  In such a bicycle brake, the protrusion of the advance / retreat movable body is moved along the spiral hole of the rotary cylindrical body and the long hole of the base cylindrical body based on the operating force that rotates the rotary cylindrical body in a predetermined direction. By moving, the advance / retreat movable body can be moved in the axial direction of the base cylindrical body. Since the bicycle brake of the present invention can be switched from the braking force release state to the braking force acting state by pulling the wire, it is compared with a known bicycle brake that requires an operation of pulling the lever forward. Therefore, it is easy to operate even for people with weak gripping force, and in situations where the brake operation of the kite is forced, the rotating cylindrical body gripped during driving is in a predetermined direction (preferably a direction in which it is turned to the user). It is possible to respond appropriately by applying an operating force to turn to, and excellent practicality.

  In addition, in the bicycle brake of the present invention, when the advance / retreat movable body moves in the axial direction of the base cylindrical body, the protrusion of the advance / retreat movable body is inserted into an elongated hole formed in the base cylindrical body extending in the axial direction. Since the structure that guides is adopted, smooth movement of the advance / retreat movable body can be realized with a simple structure, for example, the situation where the advance / retreat movable body moves in the axial direction while rotating in the base cylindrical body, The twist of the brake wire accompanying the rotation of the advance / retreat movable body can be suitably avoided.

  In particular, in the bicycle brake of the present invention, if a biasing means for biasing the movable body in a direction opposite to the pulling direction of the wire when switching from the braking force release state to the braking force acting state is provided, a rotating cylindrical shape is provided. During normal operation where no operating force is applied to turn the body in a predetermined direction, it is possible to avoid a situation where the advancing / retreating movable body unexpectedly moves in the direction of pulling the wire, and the rotating cylindrical body is rotated in a predetermined direction. When the operating force is stopped or weakened, the advancing / retracting movable body is moved in the direction opposite to the pulling direction of the wire by the urging force of the urging means to automatically change from the braking force application state to the braking force release state. Can be switched.

  Furthermore, in the bicycle brake according to the present invention, it is possible to apply a separate base cylindrical body from the handlebar, but it is possible to reduce the number of parts and to weld the base cylindrical body to the handlebar. In order to avoid lowering the rigidity of the portion fixed to the handle bar without requiring the fixing operation, it is preferable to apply a base cylindrical body formed integrally with the handle bar.

  In addition, the bicycle of the present invention is characterized by including the bicycle brake having the above-described configuration.

  ADVANTAGE OF THE INVENTION According to this invention, the operation | movement which hung a finger | toe on a lever and pulling forward is not requested | required, The bicycle brake excellent in operativity, and the bicycle provided with such a bicycle brake can be provided.

1 is an overall schematic diagram of a bicycle brake according to an embodiment of the present invention. The whole external appearance figure of the base cylindrical body in the embodiment. The top view of the base cylindrical body. The external view of the cap in the embodiment. The side view of the cap. FIG. The disassembled perspective view of the advance / retreat movable body in the same embodiment. The top view of the slider in the embodiment. FIG. 9 is a sectional view taken along line yy of FIG. 8. The external view of the rotation cylindrical body in the embodiment. The top view of the rotation cylindrical body. FIG. 12 is a sectional view taken along the line zz in FIG. 11. The principal part expanded sectional schematic diagram of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the bicycle brake 1 according to the present embodiment includes a base tubular body 2 having a long shape, and a longitudinal direction A of the base tubular body 2 housed in the base tubular body 2. The main component is a movable body 3 that can move forward and backward within a predetermined range along a long axis, and a long cylindrical body 4 that can be rotated in the circumferential direction with the base cylindrical body 2 externally fitted. It is a thing.

  The base cylindrical body 2 has a hollow cylindrical shape (pipe-like hollow structure) integrally formed with a handlebar H that is connected to a front fork via a stem (not shown) at the center portion in the longitudinal direction A and transmits a steering force to a front wheel. Is. As shown in FIGS. 2 and 3, long holes 21 extending in the axial direction are formed in the vicinity of both ends of the base cylindrical body 2. Both ends in the axial direction A of each long hole 21 are closed ends that are not open to the outside. Further, a hole (wire insertion hole 22) for passing the brake wire W is formed in the vicinity of the center portion in the longitudinal direction A of the base cylindrical body 2. Note that an appropriate cap or tape for reducing friction may be attached to or attached to the opening edge of the wire insertion hole 22 as long as the wire insertion hole 22 is not blocked. The longitudinal dimension of the base cylindrical body 1 of this embodiment that also functions as the handlebar H can be set to an appropriate value according to the bicycle standard (adaptive height) and the like. 1 to 3, the linear base cylindrical body 1 is shown. However, a central portion (clamp portion) in the longitudinal direction A connected to the front fork and a portion corresponding to a portion gripped by the user ( It is also possible to set a shape having a curve between the grip portion and a shape in which the grip portion is set at a higher position than the clamp portion.

  Caps 5 as shown in FIGS. 4 to 6 (FIG. 6 is a view taken in the direction of the arrow x in FIG. 5) can be attached to the end of the base cylindrical body 2, respectively. In the present embodiment, female screws are formed on the inner peripheral surfaces of both ends of the base cylindrical body 2, and male screws provided on the outer peripheral surface of the insertion portion 51 that can be inserted into the base cylindrical body 2 in the cap 5. The cap 5 can be attached to the base cylindrical body 2 by being screwed into the female screw. The cap 5 of this embodiment forms a hexagonal hole 53 in the cap body 52 exposed to the outside of the base cylindrical body 2 in a state of being attached to the base cylindrical body 2 (see FIG. 6), and a tool is formed in the hexagonal hole 53. The cap 5 can be smoothly tightened or removed from the base cylindrical body 2 by inserting and turning in a predetermined forward and reverse direction. Such a base cylindrical body 2 cannot be rotated in the fixed state connected to the front fork via the stem, and cannot move in the longitudinal direction A (axial direction).

  As shown in FIG. 7, the advancing / retracting movable body 3 is disposed in the internal space in the vicinity of the end of the base cylindrical body 2 and is movable in the longitudinal direction A of the base cylindrical body 2, And a protrusion 32 that can be attached to the slider 31 in a state of protruding from the outer surface. For convenience of explanation, FIG. 1 shows a state in which the advance / retreat movable body 3 and the rotary tubular body 4 are mounted only on one end side of the base cylindrical body 2, and the other end side is movable back and forth. A state in which the body 3 and the rotating cylindrical body 4 are not mounted is shown. For example, a bicycle brake 1 constituted by one end side region of the base cylindrical body 2 and the forward / backward movable body 3 and the rotary cylindrical body 4 provided in this region is used for the front wheel, and the base cylindrical body 2 The bicycle brake 1 constituted by the other end side region and the forward / backward movable body 3 and the rotating cylindrical body 4 provided in this region can be used for the rear wheel.

  As shown in FIGS. 7 to 9 (FIG. 9 is a cross-sectional view taken along the line y-y in FIG. 8), the slider 31 includes a wire extraction hole 31a for inserting one end portion of the brake wire W, and the wire extraction It has a wire accommodating space 31b that is continuous with the hole 31a and can accommodate the wire W. Of the slider 31, a protrusion mounting hole 311 for attaching the protrusion 32 is formed at one end in the longitudinal direction A that coincides with the axial direction A of the base cylindrical body 2, and the other end in the longitudinal direction A is formed at the other end. A hollow set 312 capable of fixing the wire W accommodated in the wire accommodating space 31b is screwed and attached. The slider 31 of the present embodiment sets the outer diameter of both ends of the longitudinal direction A slightly smaller than the inner diameter of the base cylindrical body 2 and sets the outer diameter of the central portion smaller than the outer diameter of both ends. Yes. Thereby, when the slider 31 moves in the base cylindrical body 2, both end portions in the longitudinal direction A are in contact with or close to the base cylindrical body 2, thereby causing unnecessary fluctuation of the slider 31 itself in the base cylindrical body 2. While being able to prevent, since the center part of the longitudinal direction A cannot contact the internal peripheral surface of the base cylindrical body 2, the friction at the time of a slide movement can be reduced effectively. In the present embodiment, one end of the slider 31 in which the protrusion mounting hole 311 is formed is relatively closer to the end of the base cylindrical body 2 than the other end to which the enamel set 312 is mounted (the cap 5 is mounted). Side) is accommodated in the base cylindrical body 2. Further, the wire W can be fixed to the slider 31 by pressing the tip of the enamel set 312 against the wire W inserted into the wire accommodating space 31b from the wire drawing hole 31a.

  The protrusion 32 includes a protrusion main body 321 whose base end 32A can be press-fitted into the protrusion attachment hole 311 of the slider 31, and a bearing 322 (see FIG. 1) that is rotatably attached to the distal end 32B of the protrusion main body 321. It is equipped with. In FIG. 7, the bearing 322 is omitted.

  The advancing / retracting movable body 3 configured using the slider 31 and the protrusion 32 is configured such that after the slider 31 (the slider 31 alone) without the protrusion 32 is accommodated in the base cylindrical body 2, By aligning the long hole 21 of the cylindrical body 2 with the protrusion mounting hole 311 of the slider 31 and pressing the base end portion 32A of the protrusion main body 321 into the protrusion mounting hole 311 from the long hole 21 side in this state. The base cylindrical body 2 can be accommodated so as to be able to advance and retract. In this accommodated state, the entire movable body 3 can be slid in the longitudinal direction A (axial direction) within a range corresponding to the longitudinal dimension of the long hole 21 while guiding the protrusion 32 to the long hole 21. Yes. In particular, in the present embodiment, since the bearing 322 of the protrusion 32 is brought into contact with the long hole 21, a smooth sliding movement of the advance / retreat movable body 3 is realized. In the following, the state in which the advance / retreat movable body 3 is accommodated in the base cylindrical body 2 so as to be able to advance / retreat is referred to as an “intermediate unit body”.

  As shown in FIGS. 10 to 12 (FIG. 12 is a cross-sectional view taken along the line zz in FIG. 11), the rotating cylindrical body 4 has a hollow cylindrical shape that can be rotated while covering the base cylindrical body 2. None, and has a spiral hole 41 that functions as a guide part for causing the protrusion 32 to advance and retreat in the axial direction of the base cylindrical body 2 along the long hole 21 in accordance with the rotation operation of the rotating cylindrical body 4 itself. In the present embodiment, a metallic one is applied as the rotating cylindrical body 4. Both ends of the spiral hole 41 do not reach the end of the rotating cylindrical body 4 and are closed ends. In the present embodiment, the outer peripheral surface of the rotating cylindrical body 4 is appropriately 90 degrees or more and 180 degrees or less in the circumferential direction while extending at a predetermined angle along the longitudinal direction A that coincides with the axial direction A of the base cylindrical body 2. The spiral hole 41 that is rotated by the angle of is applied. The spiral hole 41 is formed in a predetermined region on the one end side in the longitudinal direction A of the rotating tubular body 4. The width of the spiral hole 41 in the circumferential direction is slightly larger than the outer diameter of the protrusion 32 (specifically, the outer diameter of the bearing 322), and the protrusion 32 can be accommodated in the spiral hole 41. ing. Further, the inner diameter of the rotating cylindrical body 4 is slightly larger than the outer diameter of the base cylindrical body 2, and one end portion of the rotating cylindrical body 4 is projected toward the radial center from the other inner peripheral surface. The flange 42 is integrally formed (see FIG. 12).

  The operation of mounting the rotating tubular body 4 to the intermediate unit body is performed by leaving the protrusion 32 of the intermediate unit body removed from the slider 31 and forming the flange portion 42 of the rotating tubular body 4. It is carried out by inserting the base cylindrical body 2 into the intermediate unit body so as to cover the base cylindrical body 2 from the end which is not. When the rotating cylindrical body 4 is inserted to some extent, the flange portion 42 of the rotating cylindrical body 4 hits the end of the base cylindrical body 2, whereby further insertion operation is restricted. Then, the base end portion 32A of the projecting body 321 is connected to the spiral hole 41 of the rotating tubular body 4, the long hole 21 of the base tubular body 2, and the projecting portion mounting hole 311 of the slider 31. It press-fits into the protrusion mounting hole 311 from the spiral hole 41 and the long hole 21 side. Finally, the cap 5 is attached to the end of the base cylindrical body 2. When one end of the spiral hole 41 is set to an open end that reaches the end of the rotating tubular body 4 where the flange portion 42 is not formed, the protrusion 32 is attached to the slider 31. The protrusion 32 can be accommodated in the spiral hole 41 through the open end of the spiral hole 41 with respect to the intermediate unit body in the state, and the protrusion 32 is attached when the rotating cylindrical body 4 is attached to the intermediate unit body. There is no need to remove the slider from the slider 31, which is advantageous in this respect.

  In the present embodiment, as the cap 5, a disc-shaped cap body 52 having an outer diameter substantially the same as the outer diameter of the rotating cylindrical body 4, and an insertion portion having an outer diameter slightly smaller than the inner diameter of the rotating cylindrical body 4 51 is integrated. The cap 5 can be attached to the base cylindrical body 2 by inserting the insertion portion 51 into the end of the base cylindrical body 2. In this attached state, as shown in FIG. 13, which is a schematic cross-sectional view of the main part of FIG. 1, the flange portion 42 of the rotating cylindrical portion is sandwiched between the cap body 52 and the end portion of the base cylindrical body 2. Thus, the rotating cylindrical body 4 can be prevented from coming off from the end of the base cylindrical body 2, and the rotating cylindrical body 4 can be made immovable in the axial direction A of the base cylindrical body 2. In the present embodiment, as described above, the male screw portion that can be screwed to the outer peripheral surface of the insertion portion 51 of the cap 5 and the female screw portion formed on the inner peripheral surface of the region near the end portion of the base cylindrical body 2 is provided. The cap 5 is prevented from being unexpectedly detached from the base cylindrical body 2 by forming and screwing the male thread portion into the female thread portion of the base cylindrical body 2.

  With the above procedure, in a state where the rotating cylindrical body 4 is mounted on the intermediate unit body, the rotating cylindrical body 4 cannot move in the axial direction (longitudinal direction A) of the base cylindrical body 2 and has a predetermined angle in the circumferential direction. It can rotate within the range. It is the spiral hole 41 that defines the rotatable angular range of the rotating tubular body 4.

  Further, the bicycle brake 1 according to the present embodiment has a biasing means 6 that biases the movable body 3 in the direction opposite to the pulling direction W1 of the wire W toward the center in the longitudinal direction A of the base cylindrical body 2. (Refer to FIG. 13). In the present embodiment, a spring 61 disposed in a compressed state is applied as the biasing means 6 between the advance / retreat movable body 3 and the cap 5. The biasing force of the spring 61 acts on the advance / retreat movable body 3 as a force for moving the advance / retreat movable body 3 in the direction away from the cap 5. Further, the portions of the movable body 3 and the cap 5 that are in contact with the spring 61 are formed on flat surfaces perpendicular to the axial direction A, and the contact area of both ends of the spring 61 in the expansion / contraction direction (axial direction A) is set as large as possible. (See FIG. 13). The urging means 6 configured using such a spring 61 is configured such that the spring 61 is moved from the end of the base cylindrical body 2 into the base cylindrical body 2 after the rotating cylindrical body 4 is mounted on the intermediate unit body. By accommodating 61 and subsequently attaching the cap 5 to the end of the base cylindrical body 2, the spring 61 is compressed, and the movable body 3 is always urged away from the cap 5.

The bicycle brake 1 according to the present embodiment including the above members passes through the base tubular body 2 through the base tubular body 2 through the brake wire W holding one end of the slider 31 of the advance / retreat movable body 3. It can be pulled out of the base cylindrical body 2 through the wire insertion hole 22 formed in the cylindrical body 2, and the left and right brake shoes are pressed against the rim of the wheel by pulling the brake wire W in a predetermined pulling direction W1. This demonstrates the braking power.

  Specifically, the bicycle brake 1 is configured so that the advancing / retracting body 3 is moved away from the cap 5 by the biasing means 6 in a braking force release state where a predetermined rotational force is not applied to the rotating tubular body 4. The projecting portion 32 of the movable body 3 that is energized and hits the edge of the long hole 21 of the base cylindrical body 2 on the side opposite to the cap 5, or the anti-cap of the spiral hole 41 of the rotating cylindrical body 4 It hits the edge on the 5 side (in the illustrated example, it hits the edge on the side opposite to the cap 5 in the long hole 21). In this braking force release state, the left and right brake shoes cannot be pressed against the rim of the wheel, and no braking force acts on the wheel.

  On the other hand, when an operating force for rotating the rotating cylindrical body 4 in a predetermined direction (preferably on the near side) is given, the projecting portion 32 is formed in the spiral hole 41 and the long hole 21 as the rotating cylindrical body 4 rotates. The slider 31 is guided to the cap 5 side and moves to the cap 5 side. Naturally, the slider 31 capable of operating integrally with the protrusion 32 also moves to the cap 5 side. That is, the entire movable body 3 is moved toward the cap 5 against the biasing force of the biasing means 6. As a result, the brake wire W having one end held by the slider 31 of the advance / retreat movable body 3 can be pulled to the cap 5 side (towing direction W1), and the left and right brake shoes are pressed against the rim of the wheel. A braking force acting state in which the braking force acts is brought about. In the present embodiment, the movable body 3 is set so as to be in a braking force acting state when it moves about 1 cm, for example, in the wire pulling direction W from the position (normal position) when the braking force is released. That is, the advance / retreat movable body 3 is set so that the brake is effective by moving the movable body 3 by a predetermined distance shorter than the distance corresponding to the dimension A in the axial direction of the long hole 21 and the spiral hole 41. This is to avoid a situation where the balance of the posture is lost or an unreasonable posture is forced when the user rotates the rotating tubular body 4 more than a necessary angle during the brake operation.

  Thus, in the bicycle brake 1 according to the present embodiment, the protrusion 32 of the advance / retreat movable body 3 is formed on the spiral hole 41 of the rotary cylinder 4 based on the operating force that rotates the rotary cylinder 4 in a predetermined direction. And moving the movable body 3 in the axial direction A of the base cylindrical body 2 with respect to the base cylindrical body 2 by moving it along the long hole 21 of the base cylindrical body 2 and pulling the wire W. Because it is possible to switch from the braking force release state to the braking force acting state by using, the operation is easy even for people with weak grip strength compared to the well-known bicycle brake that requires pulling the lever toward you In addition, in situations where the brake operation of the kite is forced, it can be suitably dealt with by applying an operating force to turn the rotating cylindrical body 4 gripped during driving in a predetermined direction (preferably in a direction to turn in front of the user). Excellent practicality That. In particular, in the bicycle brake 1 according to the present embodiment, when the advance / retreat movable body 3 moves in the axial direction A of the base cylindrical body 2, it advances and retracts in the long hole 21 extending in the axial direction A formed in the base cylindrical body 2. In order to guide the protrusion 32 of the movable body 3, the advancing / retreating movable body 3 moves while rotating with respect to the base cylindrical body 2, for example, and the brake wire W is twisted in the base cylindrical body 2. Thus, the smooth movement of the movable body 3 can be realized with a simple structure.

  In addition, the bicycle brake 1 according to the present embodiment can accommodate the region of the brake wire W extending from the wire insertion hole 21 to the slider 31 in a state where it is not in contact with other members in the base cylindrical body 2. . As a result, for example, the wire itself due to repeated braking operations or the like, compared to a configuration in which a predetermined region along the axial direction of the wire W is switched between a braking force release state and a braking force acting state while keeping in contact with other members. Further, it is possible to prevent wear and damage of the parts in contact with the wires.

  Furthermore, since the bicycle brake 1 according to the present embodiment includes the urging means 6 that urges the movable body 3 in the direction opposite to the pulling direction W1 of the wire W, the rotating tubular body 4 is moved in a predetermined direction. During normal operation in which no operating force is applied, the advancing / retreating movable body 3 can be prevented from suddenly moving in the direction of pulling the wire W, and the rotating cylindrical body 4 can be rotated in a predetermined direction. When the force is stopped or weakened, the advancing / retreating movable body 3 is urged in the direction opposite to the pulling direction W1 of the wire W by the urging force of the urging means 6 to release the braking force from the braking force acting state. It is convenient because it can automatically switch to the state. In particular, depending on the setting of the urging force of the urging means 6, the operation force required to move the advance / retreat movable body 3 from the position (normal position) when the braking force is released to the direction of pulling the wire W can be adjusted. The operating force required for brake operation can be set as appropriate within the allowable range of laws and regulations to be complied with (for example, those that can stop within 3 meters while traveling at 0 km / h).

  In addition, since the bicycle brake 1 according to the present embodiment employs the base cylindrical body 2 that is formed integrally with the handle bar H, compared with the case where the base cylindrical body and the handle bar are separate. Thus, the number of parts can be reduced and, for example, the work of fixing a base cylindrical body separate from the handlebar to the handlebar by welding or the like is unnecessary, and the same rigidity as the handlebar is given. be able to.

  A bicycle including the bicycle brake 1 as described above is excellent in operability of the brake and is convenient for the user.

  In addition, this invention is not limited to embodiment mentioned above. For example, a bicycle brake may be used in which a separate body from the handlebar is applied as the base cylindrical body, and the base cylindrical body is fixed to both ends of the handlebar by appropriate means such as welding. In this case, it is desirable to set the longitudinal dimension of the base cylindrical body to be larger than the longitudinal dimension of the advance / retreat movable body. In addition, when the base cylindrical body and the handle bar are separated, the hole corresponding to the wire insertion hole of the above embodiment may be formed in either the base cylindrical body or the handle bar.

  Moreover, the brake for bicycles provided with the grip which coat | covers a rotating cylindrical body may be sufficient. The grip may be of a cap type that can be inserted into and removed from the rotating cylindrical body, or may be of a wound type that is wound around the outer surface of the rotating cylindrical body with an appropriate taping material.

  Also, a bicycle brake that does not include an urging means may be used.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Bicycle brake 2 ... Base cylindrical body 21 ... Long hole 3 ... Advance / retreat movable body 32 ... Projection part 4 ... Rotary cylindrical body 41 ... Spiral hole 6 ... Biasing means W ... Brake wire

Claims (2)

A braking force acting state in which a braking force is applied to the wheel by pulling a wire and pressing a brake shoe against a bicycle wheel, and a braking force releasing state in which the braking force is released by stopping or weakening the wire pulling force A bicycle brake that can be switched between
A non-rotatable base tubular body that forms a long hole extending in the axial direction corresponding to the longitudinal direction;
The slider includes a slider accommodated inside the base cylindrical body while holding one end of the wire, and a protrusion provided on an outer peripheral surface of the slider, and the slider is guided while the protrusion is guided in the elongated hole. Is an advance / retract movable body capable of moving back and forth in the axial direction of the base cylindrical body,
A rotating cylindrical body that is rotatable in a state of covering the base cylindrical body ;
A cap attached to an end of the base tubular body;
A single biasing means ,
The base cylindrical body is formed integrally with the handlebar, and the region extending from the wire insertion hole formed in the vicinity of the central portion in the longitudinal direction of the wire to the slider contacts the other members in the base cylindrical body. Is not accommodated,
The single urging means is disposed between the cap and the advance / retreat movable body, and the pulling direction of the wire when the advance / retreat movable body is switched from the braking force release state to the braking force acting state. It is energized in the opposite direction,
Each portion of the cap that the urging means hits is set to a flat surface that goes straight in the axial direction,
The rotating cylindrical body has a spiral hole that functions as a guide portion that advances and retracts the protrusion in the axial direction of the base cylindrical body along the elongated hole in accordance with a rotating operation.
The rotatably mounted a single bearing at the distal end of the projection, based on the operation force for rotating the rotary tubular body in a predetermined direction, added the single bearing the slot and the spiral hole By moving the projecting part along the spiral hole and the long hole in a contact state, the advance / retreat movable body resists the urging force of the urging means in the axial direction of the base cylindrical body. It is configured to be able to switch from the braking force release state to the braking force acting state by moving and pulling the wire,
The slider sets the outer diameter of both end portions in the axial direction to be slightly smaller than the inner diameter of the base cylindrical body, and sets the outer diameter of the central portion in the axial direction to be smaller than the outer diameters of both end portions in the axial direction. The base cylindrical body in a state where both end portions in the axial direction are in contact with or close to the inner peripheral surface of the base cylindrical body and the central portion in the axial direction is not in contact with the inner peripheral surface of the base cylindrical body. It der which moves in the axial direction at is,
The projecting portion is attached to one end of the slider in the axial direction at which the urging member contacts, and the wire is held at the other end,
The forward / backward movable body is shorter than the distance corresponding to each dimension along the axial direction of the elongated hole and the spiral hole from the normal position, which is the position when the braking force is released, in the pulling direction of the wire. bicycle brake characterized that you have set to be the brake force acting state when moving by a predetermined distance. A bicycle comprising the bicycle brake according to claim 1.

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