WO2014181973A1

WO2014181973A1 - Clutch for bicycle and child's bicycle including same

Info

Publication number: WO2014181973A1
Application number: PCT/KR2014/003200
Authority: WO
Inventors: 양호석; 정병천
Original assignee: (주)이디
Priority date: 2013-05-09
Filing date: 2014-04-14
Publication date: 2014-11-13
Also published as: KR101594214B1; CN205440737U; KR20140133050A

Abstract

The present invention relates to a clutch for a bicycle and a child's bicycle including the same. A clutch for a bicycle according to an embodiment of the present invention includes: an outer wheel having an inner periphery with at least one first concave-convex surface defining a virtual bottom land and a virtual top land; an inner wheel having a stopper and an outer periphery with at least one second concave-convex surface with a sliding surface extending from the stopper, the inner wheel being partly inserted in the inner periphery of the outer wheel and being rotated; and a free lock part having a given diameter and being capable of moving by sliding or rotating between the sliding surface of the inner wheel and the concave-convex surface of the outer wheel, the movement of the free lock part being limited by the stopper.

Description

Bicycle clutch and infant bicycle comprising same

The present invention relates to a bicycle, and more particularly, to a bicycle clutch and a baby bicycle including the same.

Infants between the ages of two and eight need to exercise their legs to keep up with their growth. Infant bicycles are recognized as an essential means of play during the growth of infants because they can exercise leg strengthening while playing. Infant bicycles are generally tricycles, but there are four-wheeled bicycles with auxiliary wheels on the two-wheelers. Such infant bicycles may be used as a vehicle for safely moving an infant when going out instead of a baby carriage.

The driving operation of the above-described infant bicycle is generally made by a guardian who pushes the bicycle because the infant is young. To this end, in general, a handle is arranged at the rear of the frame of the baby bicycle to allow the guardian to push the bicycle, and a link or wire member for allowing the guardian to hold the handle and steer the front wheel is disposed between the shaft and the front wheel of the handle. Is provided.

In the front wheel of a conventional infant bicycle, when the guardian pushes the bicycle, the pedal of the front wheel also rotates forward, and the infant often injuries the leg. Therefore, even when the guardian pushes the bicycle forward, it is preferable that the pedal does not rotate even when the pedal of the front wheel does not rotate or there is a small load on the pedal that occurs when an infant puts his foot on the pedal. In addition, as the infant grows, when the infant attempts to drive the bicycle by directly turning the pedal, the rotational force applied by the infant to the pedal is also transmitted to the wheel, and the infant may be required to directly drive the bicycle. Therefore, when one of the guardian and the infant intends to drive the bicycle directly, there is a need for a clutch in which power transmission of the pedal and the front wheel can be selectively performed according to the user.

When not only a bicycle but also the function of the baby carriage in which the infant who rides the bicycle can sleep, a quiet running is required. In this case, the clutch preferably has a structure in which noise is suppressed.

Accordingly, the technical problem to be solved by the present invention is to distinguish between when the guardian pushes the bicycle forward from behind the infant who rides the bicycle or when the infant attempts to drive the bicycle forward by manipulating the pedal by himself, It is to provide a bicycle clutch that can control the connection between the wheels selectively, can be easily manufactured, and can be quietly driven.

In addition, the technical problem to be solved by the present invention is to provide an infant bicycle with improved use by including the above-described clutch.

Bicycle clutch according to an embodiment of the present invention for achieving the above technical problem, the inner circumference formed with at least one first uneven surface defining a virtual bottom land (virtual bottom land) and a virtual top land (virtual top land) Having an outer ring; An inner ring having an outer circumference at least partially embedded in the inner circumference of the outer ring and having at least one second uneven surface having a stopper portion and a sliding surface extending from the stopper portion; And a free locking chain having a constant diameter and capable of moving by sliding or rotating between the sliding surface of the inner ring and the uneven surface of the outer ring, the movement of which is restricted in the stopper part. The distance between the sliding surface of the first uneven surface and the second uneven surface changes repeatedly according to the relative rotation of the inner ring and the outer ring, i. At the first contact position close to the stopper portion on the sliding surface larger than the diameter, the rotational force of the outer ring is not transmitted to the inner ring, and ii) the stopper portion on the sliding surface whose distance is smaller than the diameter of the free locking engagement. At the second contact position away from the rotational force of the inner ring is transmitted to the outer ring by the free latching.

According to another embodiment of the present invention, a bicycle clutch includes a sum of a distance between a center of the inner ring and a position of a first contact point on the sliding surface on which the free latch is located and a diameter of the free locking block being simulated from the center of the inner ring. When smaller than the distance to the upland line, the rotational force of the outer ring is not transmitted to the inner ring, and the distance from the center of the inner ring to the second contact position on the sliding surface where the free locking block is located and the free locking block When the sum of diameters is larger than the distance from the center of the inner ring to the virtual stop line, the rotational force of the inner ring is transmitted to the outer ring.

An infant bicycle according to an embodiment of the present invention for achieving the above another technical problem is an infant bicycle which can be operated by rotating a pedal coupled to a front wheel and a protector handle coupled to a bicycle body, and on the front wheel. And a fixed bicycle clutch, wherein the outer ring is fixed to the wheel base of the bicycle, and the inner ring is fixed to the central axis of the pedal.

According to embodiments of the present invention, the free locking between the first concave-convex surface of the outer ring and the second concave-convex surface of the inner ring is transmitted so that the rotational force of the inner ring is transmitted to the outer ring. A one-way bicycle clutch is provided that can selectively control the connection between the pedal and the wheel, distinguishing when the bicycle is pushed forward from the back of the occupant and when the infant tries to drive the bicycle forward by directly operating the pedal. Can be.

In addition, according to the embodiment of the present invention, since the free lock has a movement substantially free of noise such as sliding or rotation, there is no repetitive noise such as a rattling sound in the disengaged state shown in the conventional ratchet structure. In addition, a clutch for a bicycle capable of maintaining quiet running may be provided.

In addition, according to embodiments of the present invention, by using a bicycle clutch having the above-described advantages can be provided for an infant bicycle with improved use.

Figure 1a is an exploded perspective view showing the outer ring, the inner ring and the free lock of the clutch in accordance with an embodiment of the present invention, Figure 1b is a front view showing a coupling state thereof.

2A and 2B are front views illustrating the release and locking states of the bicycle clutch according to the embodiment of the present invention, respectively.

3A and 3B are front views respectively showing bicycle clutches according to another embodiment of the present invention.

Figure 4 is an exploded perspective view showing a fastening structure of the wheel for a bicycle according to an embodiment of the present invention.

Figure 5 is a perspective view schematically showing a baby bike including a bicycle clutch according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following examples can be modified in various other forms, and the scope of the present invention is It is not limited to an Example. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art.

In addition, in the following drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description, the same reference numerals in the drawings refer to the same elements. As used herein, the term “and / or” includes any and all combinations of one or more of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise" and / or "comprising" specifies the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups of these. It is not intended to exclude the presence or the addition of one or more other shapes, numbers, acts, members, elements and / or groups.

Although the terms first, second, etc. are used herein to describe various members, parts, regions, layers, and / or parts, these members, parts, regions, layers, and / or parts are defined by these terms. It is obvious that not. These terms are only used to distinguish one member, part, region, layer or portion from another region, layer or portion. Thus, the first member, part, region, layer or portion, which will be discussed below, may refer to the second member, component, region, layer or portion without departing from the teachings of the present invention.

FIG. 1A is an exploded perspective view illustrating the outer ring 10, the inner ring 20, and the free locking chain 30 of the bicycle clutch 100 according to an embodiment of the present disclosure, and FIG. 1B illustrates a coupling state thereof. Front view.

1A and 1B, the clutch 100 includes an outer ring 10 and an inner ring 20 at least partially embedded in an inner circumference of the outer ring 10. The outer ring 10 and the inner ring 20 can be freely rotated relative to each other. The clutch 100 further includes a free lock 30 between the outer ring 10 and the inner ring 20, whereby the rotation of the inner ring 20 and the outer ring 10 may be limited to each other, and in this regard. This will be described in detail with reference to FIGS. 2A and 2B.

In some embodiments, only a portion of the inner ring 20 may be embedded in the inner circumference of the outer ring 10. In order to prevent the inner ring 20 from being completely embedded in the inner circumference of the outer ring 10, the inner ring 20 has a flange portion 20F having a diameter larger than the diameter of the inner circumference of the outer ring 10, as shown in FIG. 1A. Can have In this case, a bearing or a lubrication structure suitable for removing friction due to contact between the flange portion 20F and the outer side surface of the outer ring 10 opposite thereto may be inserted.

The outer ring 10 and the inner ring 20 may each have a suitable coupling structure for coupling to a bicycle wheel and a pedal. For example, the outer ring 10 may be coupled to the wheel base of the bicycle, and the inner ring 20 may be coupled to the rotating shaft of the bicycle wheel to which the pedal is coupled. In some embodiments, the axis of rotation of the bicycle wheel may be provided by a crankshaft coupled to the pedal.

In some embodiments, a hole 20H through which the crank shaft or the rotating shaft may pass may be provided at the center of the inner ring 20. The shape of the hole 20H may be circular as shown in FIG. 1A. In this case, the combination with the bicycle wheel may be made through a fastening structure such as a bolt / nut, and for this purpose, the outer ring 10 and the inner ring 20 have the through holes for the fastening, for example, bolt through holes ( 10h, 20h) may be provided respectively.

In another embodiment, the shape of the hole 20H may have a polygon such as an ellipse, a quadrangle, or a triangle, and may have a shape corresponding to a cross-sectional view of the crankshaft. In this case, the rotation shaft or the crank shaft is inserted into the hole 20H so that the rotation shaft or the crank shaft and the hole 20D may be engaged with each other, and thus may be combined with the inner ring 20 and the rotation shaft or crank shaft.

The inner ring 20 may have a solid shape as a whole, but may have a partially empty space (not shown) in the body. The empty space allows a slight deformation of the inner ring 20 according to the mechanical external force, thereby smoothing the rotation of the inner ring 20 embedded in the outer ring 10.

The outer ring 10 includes a first uneven surface 10S at its inner circumference, and the first uneven surface 10S has a virtual bottom land and a virtual top land as described below with reference to FIG. 2A. It can be formed a pattern arranged repeatedly in the inner circumference to define a). The repeatedly arranged first uneven surface 10S of the outer ring 10 may include a recess 10S1 and a convex portion 10S2 extending obliquely from the recess 10S1. The convex portion 10S2 may have an asymmetrical shape between adjacent recess portions 10S1.

The inner ring 20 includes a stopper portion 20S1 and a second uneven surface 20S having a sliding surface 20S2 extending from the stopper portion 20S1 on its outer circumference. The stopper portion 20S1 has a structure for stopping the free locking chain 30 and may have a suitable shape for receiving or seating the free locking chain 30, which will be described later.

The sliding surface 20S2 provides a surface through which the free latch 30 can slide, roll or rotate on it. The free locking lock 30 is not limited to moving in continuous contact with the sliding surface 20S2 in the disengaged state of the clutch 100, and is not limited to the size of the free locking lock 30 or magnetically between the members. May be discontinuously contacted depending on electrical treatment.

The free latch 30 is inserted between the first uneven surface 10S of the outer ring 10 and the second uneven surface 20S of the inner ring 20, and can move freely without additional fixing. The movement of the free lock 30 is a concept including a relative positional movement on the sliding surface 20S2 by inertia or by centrifugal force due to the rotation of the inner ring 20. This movement of the free lock 30 is limited by the stopper portion 20S1 in the released state of the clutch 100, and in the locked state of the bicycle clutch 100, the convex portion 10S2 and the inner ring of the outer ring 10 are locked. It may be limited by pressing between the sliding surfaces 20S2 of 20.

As shown in FIG. 1A, the free locking block 30 may be a cylinder having a central axis Q parallel to the rotation axis P of the outer ring 10 and the inner ring 20, or may be a sphere. The cylinder or sphere may have a constant diameter. The cylinder or sphere is preferable in terms of rolling, sliding or rotation, and in the case of the cylinder, the clutch 100 in that the rotational force of the inner ring can be uniformly applied to the outer ring in a direction parallel to the rotation axis P of the clutch 100. ) In terms of service life and power transmission. However, the shape of the free latch 30 is merely exemplary, and the present invention is not limited thereto. For example, the free latch 30 may have a polygonal rod structure of any shape, for example pentagonal or hexagonal, which is freely movable on the sliding surface 20S2, and any gear having a plate or surface formed thereon. It may further include a shape.

2A and 2B are front views illustrating the release and locking states of the bicycle clutch 100 according to an embodiment of the present invention, respectively. Description of components having the same reference numerals as those described above among the members may refer to those disclosed with reference to FIGS. 1A and 1B unless there is a contradiction. The arrows indicated by S1 and S2 in these figures mean the rotational state of the inner ring 20 and the outer ring 10, respectively.

Referring to FIG. 2A, the outer ring 10 rotates counterclockwise as indicated by arrow S2, and for convenience of description, the counterclockwise rotation is defined as indicating that the bicycle proceeds in the forward direction. . The inner ring 20 is stopped as indicated by the dashed arrow S1. The rotation of the outer ring 20 and the inner ring 10 is relative, so that the rotational state shown in FIG. 2A rotates the outer ring 10 counterclockwise quickly, and the inner ring 20 rotates counterclockwise more slowly. Rather, it includes the case of rotating clockwise.

As the outer ring 10 and the inner ring 20 rotate relatively, the distance between the first uneven surface 10S of the outer ring 20 and the sliding surface 20S2 of the inner ring 20 changes repeatedly or periodically, Inside, it changes continuously. In the rotational state shown in FIG. 2A, between the contact K1 (hereinafter referred to as a first contact position) of the sliding surface 20S2 in which the first uneven surface 10S of the outer ring 10 and the free engagement lock 30 contact each other. This is a case where the distance of is larger than the diameter 2r of the free latch 30. In this case, while the outer ring 10 rotates in the counterclockwise direction, no interference occurs between the first uneven surface 10S and the free locking block 30, and the free locking block 30 has the first contact position K1. ) Or in the vicinity thereof, the rotational force of the outer ring 10 is not transmitted to the inner ring 20. In the present specification, the contact position where the interference of the free latch 30 does not occur is referred to collectively as the first contact position on the sliding surface 20S2. In other embodiments, where free latch 30 is a plate rather than a cylinder or sphere, it may be compared by its thickness instead of by diameter.

The distance between the first uneven surface 10S of the outer ring 10 and the first contact position K1 of the sliding surface 20S2 in contact with the free latch 30 is the first contact position K1 of the sliding surface 20S2. It may be defined as a distance from the virtual notice line VL1. Accordingly, the first contact position K1 where the free locking block 30 does not interfere with the first uneven surface 10S of the outer ring 10 from the stopper portion 20S1 of the sliding surface 20S2 is freely locked ( The distance between the first contact positions K1 of the sliding surfaces 20S2 that 30 is in contact with is up to an area larger than the diameter or thickness of the free latch 30.

In another aspect, the distance r1 from the center P of the inner ring 20 to the first contact position K1 on the sliding surface 20S2 where the free locking lock 30 is located and the free locking lock 30 When the sum of the diameters 2r is smaller than the distance from the center P of the inner ring 20 to the virtual high ground line VL1, the rotational force of the outer ring 20 is not transmitted to the inner ring 20. Therefore, the diameter or the thickness of the free latch 30 is increased. As the distance of the sliding surface 20S2 from the central axis P of the inner ring 20 increases, the size of the range of the first contact point K1 may decrease.

Referring to FIG. 2B, when the inner ring 20 rotates counterclockwise as indicated by arrow S1, the outer ring 10 is also rotated counterclockwise as indicated by arrow S2 by the free lock 30. do. The inner ring 20 may rotate in a counterclockwise direction, and a force may be applied to the outer ring 10 such that the rotational speed of the outer ring 10 does not reach the rotational speed of the inner ring 20. In any case, the rotational force of the inner ring 20 may be transmitted to the outer ring 10, thereby rotating the outer ring 10 at the same angular velocity as the acceleration of the inner ring 20. For example, when the crankshaft coupled to the pedal of the bicycle is fastened to the inner ring 20, when the infant attempts to drive the bicycle in the forward direction by turning the pedal of the bicycle, the inner ring 20 rotates in the direction of the arrow S1, and Accordingly, the outer ring 10 can also rotate in the forward direction as indicated by arrow S2.

In the rotational state shown in FIG. 2B, the distance between the contact K2 (hereinafter referred to as the second contact position) of the sliding surface 20S2, in which the first uneven surface 10S and the free latch 30 are in contact, is freely locked. The case is smaller than the diameter 2r of the chain 30. When the distance is equal to or smaller than the diameter of the free lock 30, the free lock 30 is moved by centrifugal force or inertia by the rotation of the inner ring 10, and the free lock 30 is the outer ring ( First uneven surface 10S of 10). For example, it experiences interference with the convex portion 10S2.

The free lock 30 thus moved is substantially maintained between the recess 10S1 of the outer ring 10 and the second contact position K2 of the sliding surface 20S2 of the inner ring 10, and the inner ring 20. Rotation force of) may be transmitted to the outer ring 10 via the free locking chain (30). In this specification, as described above, the contact position at which the interference of the free locking block 30 occurs is referred to collectively as the second contact position K2 on the sliding surface 20S2. In other embodiments, where free latch 30 is a plate rather than a cylinder or sphere, it can be compared by its thickness instead of by the diameter.

In the second contact position K2, the free latch 30 is rotated from the convex portion 10S2 due to the rotation of the inner ring 20 and the interference of the first uneven surface 10S of the outer ring 10 thereby. Along the inclined extension surface 20S3 of the inner circumference of the can move to the recess (10S1). At least a part of the free locking block 30 moved to the recess portion 10S1 is received by the recess portion 10S1 and slides at the second contact position K2 on the sliding surface 20S of the inner ring 20. The surface 20S can be pressed toward the recess 10S1.

In some embodiments, the recess 10S1 of the outer ring 10 may have a concave surface corresponding to the surface of the free latch 30 so that at least a portion of the free latch 30 is seated. For example, when the free latch 30 is cylindrical as shown, the recess 10S1 may have a curved surface that forms an arc. In some embodiments, the inclined extension surface 20S3 of the outer ring 10 may be flat as shown, but may have a gentle convex shape, but the present invention is not limited thereto.

Referring to FIG. 2B in conjunction with FIG. 2A, the sliding surface 20S2 may vary depending on the size of the first uneven surface 10S of the outer ring 10, the sliding surface 20S2 of the inner ring 20, and the free latch 30. The first contact point K1 has a range of intervals, and the second contact point K2 will be a specified point. The first contact point K1 having a range of a predetermined range corresponds to a dead zone since the rotational force of the inner ring 20 is not transmitted to the outer ring 10. The smaller the dead zone is, the more preferable. The number of recesses 10S1 and the convex portions 10S2 of the first uneven surface 10S of the outer ring 10 (or the frequency per revolution) and / or the second uneven surface 20S of the inner ring 10. As the number (or frequency per rotation) of the stopper portion 20S1 and the sliding surface 20S2 increases, the dead zone becomes smaller.

In some embodiments, the number of first uneven surfaces 10S may be equal to or greater than the number of second uneven surfaces 20S. As illustrated in FIGS. 2A and 2B, the number of the first uneven surfaces 10S may be 12, and the combination of the recesses 10S1 and the convex portions 10S2 of the first uneven surfaces 10S may be 30. Evenly spaced at ° intervals. In addition, the number of the second uneven surface 20S may be three, and in this case, the stopper portion 20S1 and the sliding surface 20S2 of the second uneven surface 20S are equally arranged at intervals of 120 °. This number is exemplary and may be appropriately selected in consideration of the reduction of the dead zone or the size and torque of the outer ring 10 and inner ring 20.

According to the above-described embodiment, in the locked and released state of the bicycle clutch 100, the free locking lock 30 moves through sliding or rotation, and this movement does not substantially involve noise. Accordingly, a repetitive noise such as a squeaking sound in the disengaged state shown in the clutch having a ratchet structure does not occur, and thus a bicycle clutch that can maintain quiet running when applied to a bicycle can be provided. Bicycle clutch 100 may be applied to the front wheel of the infant bicycle as described below, or may be applied to the rear wheel of the adult bicycle.

3A and 3B are front views illustrating

bicycle clutches

100A and 100B, respectively, according to another embodiment of the present invention.

Referring to FIG. 3A, the stopper portion 20S1 of the inner ring 20A of the bicycle clutch 100A may have a recessed surface 20R for receiving the free latch 30. If the free hang 30 is cylindrical, the recessed surface 20R may have an arcuate curved surface. In addition, when the free latch 30 is a spherical or polygonal rod structure, the recessed surface 20R may have a corresponding curved or polygonal structure.

Referring to FIG. 3B, the sliding surface 20S2 ′ of the inner ring 20B of the bicycle clutch 100B may include an elastic member or a noise member. The sliding surface 20S2 'may be provided between the stopper portion 20S1 and the second contact position K2. The elastic member or noise member may be resin or rubber, which may be natural or synthetic. This elastic member or noise member further suppresses noise such as crackling that may occur from the falling of the free latch 30.

Figure 4 is an exploded perspective view showing a fastening structure of the bicycle wheel 1000 according to an embodiment of the present invention.

4, the bicycle clutch 100 according to the present embodiment has an outer ring 10 coupled to the wheel base 90 of the wheel 1000, and the inner ring 20 is coupled to the crank shaft 70. Can be. The crankshaft 70 may be fastened to the inner ring 20 through the center of the inner ring 20 of the bicycle clutch 100 (see 20H in FIG. 1A). The outer ring 10 and the inner ring 20 may be provided with suitable through

holes

10h and 20h, and through these through

holes

10h and 20h, the

bolts

41a and 41b and the bolts 41a, Using fastening members such as washers or

plates

40, 50 fastened together by 41b), their respective joining can be carried out.

The outer periphery of the wheel base 90 is mounted so as to surround the tire 91 made of urethane, thereby improving the riding comfort. The pedal 60 may be coupled to both ends of the crankshaft 70, and a fastening member such as an open ring 80 may be used for their engagement. In order to enhance the aesthetics of the wheel 1000, the clutch 100 and various fastening members may be concealed by the wheel cap 92.

5 is a perspective view schematically showing a baby bicycle 2000 including a bicycle clutch according to an embodiment of the present invention. For the description of the constituent members having the same reference numerals as the above-mentioned members can refer to the foregoing disclosure.

Referring to FIG. 5, a baby bike 2000 may be a tricycle having one front wheel 93 and two rear wheels 94. The clutch according to the above embodiments may be installed on the front wheel 93, and as described with reference to FIG. 4, may be concealed in the wheel cap 92. The infant bicycle 2000 may include a guardian handle 200 coupled to the bicycle frame to enable the guardian to operate. In some embodiments, the guardian handle 200 may be connected to the infant handle 300, which is a steering device, via a rotatable, suitable link member (not shown) for steering of the front wheel 93.

When the guardian pushes the bicycle 2000 forward while holding the handle 200, the

wheels

93 and 94 of the bicycle 2000 both rotate and roll forward, but as described above with reference to FIG. 2B, When the infant raises his foot on the pedal 60, even if the outer ring 10 of the clutch mounted on the front wheel 93 rotates in the forward direction, since the rotational force of the outer ring 10 is not transmitted to the inner ring 20, the clutch The inner ring 20 of the can be fixed, the pedal 60 is not rotated, the convenience of use can be improved.

However, when the infant riding on the bicycle 2000 directly rolls the pedal, the inner ring 20 of the clutch rotates with the rotation of the pedal 60, and thus the rotational force is transmitted to the outer ring 10, whereby the front wheel As the 93 is rotated, the bicycle 2000 will be driven forward.

As described above, the infant bicycle according to the present invention can not only improve the convenience of use while the protector assists the operation of the bicycle by the clutch structure, and the infant can directly drive the bicycle as the infant grows. The service life of the bicycle may be increased. In addition, since the clutch according to the embodiment of the present invention is reduced and suppressed noise, the clutch is not limited to an infant bicycle, and when a quiet running is applied to a bicycle having a stroller function that allows infants to sleep, such as a stroller, Excellent performance can be achieved.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and alterations are possible within the scope without departing from the technical spirit of the present invention, which are common in the art. It will be apparent to those who have knowledge.

10: outer ring 20: inner ring

30:

Lockout

100, 100A, 100B: Clutch

1000: Wheel 2000: Bike

Claims

An outer ring having an inner circumference formed with at least one first uneven surface defining a virtual bottom land and a virtual top land;

An inner ring having an outer circumference at least partially embedded in the inner circumference of the outer ring and having at least one second uneven surface having a stopper portion and a sliding surface extending from the stopper portion; And

It has a constant diameter, and can move by sliding or rotating between the sliding surface of the inner ring and the concave-convex surface of the outer ring, and includes a free locking lock that the movement is limited in the stopper portion,

The distance between the sliding surface of the first uneven surface and the second uneven surface continuously changes according to the relative rotation of the inner ring and the outer ring,

I) the rotational force of the outer ring is not transmitted to the inner ring at the first contact position close to the stopper portion on the sliding surface whose distance is greater than the diameter of the free locking block; And a rotational force of the inner ring is transmitted to the outer ring by the free locking block at a second contact position away from the stopper portion on the sliding surface smaller than the diameter of the free locking block.
An outer ring having an inner circumference formed with at least one first uneven surface defining a virtual bottom land and a virtual top land;

An inner ring having an outer circumference at least partially embedded in the inner circumference of the outer ring and having at least one second uneven surface having a stopper portion and a sliding surface extending from the stopper portion; And

It has a constant diameter, is movable between the sliding surface of the inner ring and the concave-convex surface of the outer ring is movable, and includes a free locking block that the movement is limited in the stopper portion,

The distance between the sliding surface of the first uneven surface and the second uneven surface continuously changes according to the relative rotation of the inner ring and the outer ring,

When the sum of the distance from the center of the inner ring to the first contact position on the sliding surface on which the free locking lock is located and the diameter of the free locking lock is smaller than the distance from the center of the inner ring to the virtual hill line, The rotational force of the outer ring is not transmitted to the inner ring,

When the sum of the distance from the center of the inner ring to the second contact position on the sliding surface on which the free locking chain is located and the diameter of the free locking chain is larger than the distance from the center of the inner ring to the virtual stop line; A bicycle clutch in which rotational force of an inner ring is transmitted to the outer ring.
The method according to claim 1 or 2,

The first uneven surface includes a recessed portion defining the virtual stop line, a convex portion defining the virtual notice line, and an inclined extension surface between the convex portion and the recessed portion,

And said second contact position is a contact on said sliding surface of said free latch when received and compressed in said recessed portion.
The method of claim 3, wherein

And the recess portion has a concave surface corresponding to the surface of the free locking block so that at least a portion of the free locking block is seated.
The method of claim 3, wherein

And the convex portion has an asymmetrical shape between adjacent recess portions.
The method of claim 1,

The free clutch is a bicycle clutch, characterized in that the cylindrical having a central axis parallel to the rotation axis of the inner ring and outer ring.
The method according to claim 1 or 2,

The free clutch is a bicycle clutch, characterized in that the spherical or polygonal rod structure.
The method according to claim 1 or 2,

And wherein the number of the first uneven surfaces is equal to or greater than the number of the second uneven surfaces.
The method according to claim 1 or 2,

The first uneven surface is a bicycle clutch, characterized in that evenly arranged at intervals of 30 °.
The method according to claim 1 or 2,

The second uneven surface is a bicycle clutch, characterized in that evenly arranged at intervals of 120 °.
The method according to claim 1 or 2,

And the stopper portion is recessed to have a seating surface corresponding to a surface of the free latching block to receive at least a portion of the free locking block.
The method according to claim 1 or 2,

And said sliding surface comprises an elastic member or a noise member.
The method according to claim 1 or 2,

The outer ring is fixed to the wheel base of the bicycle, the inner ring is a bicycle clutch, characterized in that fixed to the central axis of the pedal.
An infant bicycle capable of driving by rotating a pedal coupled to a front wheel and pushing a protector handle coupled to a bicycle body,

Claims 1 or 2 of the bicycle clutch fixed to the front wheel,

The outer ring is fixed to the wheel base of the bicycle, the inner ring is fixed to the central axis of the pedal infant bike.
The method of claim 14,

The infant bicycle is a tricycle having a tricycle or a stroller having a stroller function.