KR101525604B1 - Locking device for wheel and bicycle including the same - Google Patents

Abstract

The present invention provides a locking device for a wheel and a bicycle including a locking device for a wheel. The locking device for a wheel comprises: an axle fixed to a frame; a hub that can rotate around the axle; a separation prevention cap which prevents separation of the hub from the axle in the direction of the axis of the axle and includes a first prevention cap installed on one end of the axle and a second cap installed to be separated from the other end of the axle; a locking unit which is installed inside the axle and can rotate between a locking position and an unlocking position by a key; a first fixing member which moves in the radius direction upon rotation of the locking unit to prevent rotation of the hub; and a second fixing member which moves in the direction of the axis of the axle upon rotation of the locking unit to prevent the second prevention cap from being separated from the other end of the axle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a locking device for a wheel,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a wheel and a bicycle including the same.

A bicycle generally refers to a device in which a person uses a pair of feet to drive a pedal to rotate the wheel. Such a bicycle includes two wheels, a frame connecting these wheels and having a handle, a pedal for transmitting power to the rear wheels, and a brake for braking the wheel during rotation.

When these bicycles are not used, the rotation of the wheel may be restricted by a lock device to prevent the theft. The locking device restricts the rotation of the front or rear wheels of the bicycle, or fixes the frame of the bicycle to a fixed object, thereby providing a structure in which the bicycle can not be moved.

However, in spite of the above locking devices, in recent years, there have been frequent cases in which the frame supporting the wheel and the wheel is separated and the remaining components are stolen, leaving only the wheel fixed by the locking device.

KR 2010-0138419 A KR 1469835 B1 KR 1445453 B1 KR 1212812 B1

The present invention provides a locking device for a wheel and a bicycle including the locking device for solving the above-mentioned problems.

According to an aspect of the present invention,

An axle fixed to the frame;

A hub rotatable about the axle;

A first prevention cap which is fixed to one end of the axle and which prevents the hub from being separated in the axial direction of the axle with respect to the axle and a second prevention cap which is detachably installed at the other end of the axle, A detachment cap including:

A lock unit installed inside the axle, the lock unit being rotatable between a lock position and a release position by a key;

A first fixing member which is moved in a radial direction during rotation of the lock unit to prevent rotation of the hub; And

And a second fixing member which is moved in the axial direction of the axle when the lock unit is rotated to prevent the second prevention cap from being separated from the other end of the axle.

Wherein the axle is formed with an opening through which the first fixing member can pass so that the first fixing member can move in the radial direction and at least one groove into which the end of the first fixing member can be inserted is formed in the hub, .

The end of the first fixing member is inserted into the groove of the hub when the locking unit is located at the locking position and the end of the first fixing member is positioned at the rear side of the hub And can be separated from the groove.

The locking unit may further include a first cam that contacts the first fixing member and moves the first fixing member in a radial direction in accordance with the rotation.

The locking unit may further include a second cam that contacts the second fixing member and moves the second fixing member in the axial direction in accordance with the rotation.

Either one of the second fixing member and the second prevention cap may include an axially protruding protrusion, and the other of the second fixing member and the second prevention cap may include a groove corresponding to the protrusion.

When the lock unit is in the locked position, the protrusion is inserted into the groove, and when the lock unit is located at the release position, the protrusion can be disengaged from the groove.

The cross-sectional shape of the projection may have a polygonal shape.

The lock unit may use a rotary cylinder lock scheme.

According to another aspect of the present invention,

A steering frame for adjusting the directions of the front wheels, and a lock device for the above-mentioned wheels provided on at least one of the front wheel and the rear wheel.

According to the embodiment of the present invention, it is possible to more effectively prevent the bicycle stolen by restricting the rotation of the wheel and the separation of the wheel and the frame while locking the locking device.

1 is a perspective view showing an embodiment of a bicycle according to the present invention.
Fig. 2 is an exploded perspective view showing the front wheel 21 of the bicycle shown in Fig. 1 in a separated state.
3 is an exploded perspective view schematically showing the axle 110 of FIG.
4A is a cross-sectional view of the axle 110 of FIG. 2 taken along the line IV-IV, and FIG. 4B illustrates a state where the lock unit 200 is rotated counterclockwise in FIG. 4A.
FIG. 5 is a perspective view schematically showing the hub 130 of FIG. 2, and FIG. 6 is a schematic view illustrating a positional relationship between the hub 130 and the first fixing member 180.
7A is a cross-sectional view taken along line VII-VII of the axle 110 of FIG. 7B shows a state in which the lock unit 200 is rotated counterclockwise in FIG. 7A.
FIGS. 8A and 8B schematically show the positional relationship between the second prevention cap 172 and the second fixing member 190. FIG.
9A is a cross-sectional view of the axle 110 of FIG. 2 taken along the line IX-IX. FIG. 9B shows an example in which the lock unit 200 has a cylinder lock structure, FIG. 9C shows a state in which the key is rotated in the key hole 201 of FIG. 9B and the lock unit 200 is positioned at the release position.
10A and 10B are cross-sectional views schematically showing an operating state of the locking device of the wheel in accordance with the rotational position of the lock unit 200. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements, and the size and thickness of each element may be exaggerated for clarity of explanation.

1 is a perspective view showing an embodiment of a bicycle according to the present invention. Fig. 2 is an exploded perspective view showing the front wheel 21 of the bicycle shown in Fig. 1 in a separated state.

Referring to Fig. 1, the bicycle of the present embodiment is a two-wheeled bicycle having two wheels 21, 22. The wheels 21 and 22 include a front wheel 21 and a rear wheel 22. The front wheel 21 and the rear wheel 22 are rotatably supported by the front wheel frame 11 and the rear wheel frame 12 of the main body 10, respectively.

A chain wheel (30) is coupled to the main body (10). The chain wheel (30) is connected to the driven wheel (31) by a chain (32). The chain wheel 30 is provided with a pair of paddles 41 and 42. A pair of paddles 41 and 42 are connected to the chain wheel 30 by the crank arm 50. The pair of paddles 41 and 42 are positioned symmetrically with respect to the center of rotation of the chain wheel 30. When the user rotates the chain wheel 30 by alternately pressing the pair of paddles 41 and 42, the driven wheel 31 is rotated by the chain 32. [ The driven wheel 31 is connected to the rear wheel 22 so that the rear wheel 22 is rotated. Thereby, the front wheels 22 rotate together, and the bicycle moves forward or backward.

2, the front wheel 21 includes an axle 110 fixed to the front wheel frame 11 of the main body 10, a hub 130 rotatable with respect to the axle 110, Gt; 150 < / RTI > A plurality of rods 140 are disposed between the hub 130 and the tire 150. As the hub 130 rotates about the axle 110, the tire 150 fixedly connected to the hub 130 is rotated by the plurality of rods 140.

The axle 110 has a cylindrical structure as a whole, and the lock unit 200 is inserted therein. Disposed at the axial end of the axle 110 is a hub 130 and a separation preventing cap 171, 172 that prevents the frame from being separated from the axle 110 in the axial direction of the axle 110. The separation preventing caps 171 and 172 include a first prevention cap 171 disposed at one end of the axle 110 and a second prevention cap 172 disposed at the other end of the axle 110. A first prevention cap 171 is fixed to one end of the axle 110 and a second prevention cap 172 is detachably installed at the other end. For example, the first prevention cap 171 may be integrally formed with one end of the axle 110, and the second prevention cap may be screwed to the other end of the axle 110. A first thread 112a is formed on the outer peripheral surface of the other end of the axle 110 and a second thread 112a corresponding to the first thread 112a is formed on the inner peripheral surface of the insertion portion of the second prevention cap 172. [ (173a) may be formed. The user can separate the second prevention cap 172 from the other end of the axle 110 by rotating the second prevention cap 172 in a predetermined direction.

The diameters of the first prevention cap 171 and the second prevention cap 172 are larger than the inner diameters of the hub 130 and the frame. This prevents the hub 130 and the front wheel frame 11 from being separated in the axial direction when the second preventive cap 172 is engaged with the other end of the axle 110. [

On the other hand, when the bicycle is stored or mounted, it is necessary to pay attention to theft. When a bicycle is stored or mounted, a bicycle in which both the front wheel 21 and the rear wheel 22 are rotatable may be vulnerable to theft. Also, in order to prevent the movement of the bicycle, even if the front wheel 21 or the rear wheel 22 is fixed to the mount (not shown) by a separate lock, if the separation preventive caps 171, It may also be vulnerable to theft because the remaining components of the bicycle can be easily separated from the wheels 21,

In the embodiment according to the present invention, even when the user operates the lock unit 200 having the predetermined structure provided on the axle 110 when the user wants to store or mount the bicycle, the rotation of the wheels 21 and 22 And prevent the main body 10 from being separated from the wheels 21 and 22.

3 is an exploded perspective view schematically showing the axle 110 of FIG. 2 and 3, the lock unit 200 is installed inside the axle 110 and is rotatable between a lock position and a release position. The lock unit 200 is formed with a keyhole 201 into which a key is inserted. By inserting a key into the keyhole 201 and rotating the keyhole 201 from the locked position to the released position and from the released position to the locked position.

When the lock unit 200 is in the locked position, the first holding member 180 moves outward along the radial direction to limit the rotation of the hub 130. [ When the lock unit 200 is in the release position, the first fixing member 180 does not move inward along the radial direction to restrict the rotation of the hub 130. [ To this end, the lock unit 200 includes a first cam 210 that contacts the first fixing member 180 and radially moves the first fixing member 180 in accordance with the rotation.

4A is a cross-sectional view of the axle 110 of FIG. 2 taken along the line IV-IV, and FIG. 4B illustrates a state where the lock unit 200 is rotated counterclockwise in FIG. 4A. In FIG. 4A, the lock unit 200 is in the unlocked position, and in FIG. 4B, the lock unit 200 is in the locked position.

4A, the lock unit 200 is disposed inside the axle 110, and the first cam 210 is in contact with the first end 181 of the first fixing member 180. One end 181 of the first fixing member 180 may have an inclined surface so as to be moved outward along the radial direction as the first cam 210 rotates. The other end 182 of the first fixing member 180 is inserted into the opening 115 of the axle 110.

Referring to FIG. 4B, as the lock unit 200 rotates counterclockwise, the first cam 210 rotates. The first fixing member 180 contacting the first cam 210 moves in the radial direction along the shape of the first cam 210. The radial direction is a direction perpendicular to the axial direction of the axle 110. At this time, the opening 115 serves to prevent the first fixing member 180 from swinging in the direction crossing the radial direction. An elastic member S1 may be disposed between the first fixing member 180 and the axle 110. [ When the lock unit 200 rotates clockwise, the first fixing member 180 is restored as shown in FIG. 4A by the elastic member S1.

FIG. 5 is a perspective view schematically showing the hub 130 of FIG. 2, and FIG. 6 is a schematic view illustrating a positional relationship between the hub 130 and the first fixing member 180. Referring to FIG. 5, the hub 130 is a cylindrical structure having a hollow therein. A plurality of projections 131 protruding inward are formed in the hollow interior of the hub 130. The plurality of projections 131 are spaced apart from each other. A groove 132 is formed between the spaced protrusions 131.

6, the other end 182 of the first fixing member 180 is inserted into the groove 132 to limit the rotation of the hub 130. As shown in FIG. At this time, the lock unit 200 is in the locked position. On the other hand, when the lock unit 200 is in the release position, the first fixing member 180 moves inward along the radial direction. As a result, the other end 182 of the first fixing member 180 is disengaged from the groove 132, so that the rotation of the hub 130 is not restricted.

3, the second fixing member 190 is moved along the axial direction while the lock unit 200 rotates between the lock position and the release position. The lock unit 200 includes a second cam 220 that contacts the second holding member 190 and moves the second holding member 190 in the axial direction in accordance with the rotation.

7A is a cross-sectional view taken along line VII-VII of the axle 110 of FIG. 7B shows a state in which the lock unit 200 is rotated counterclockwise in FIG. 7A. In Fig. 7A, the lock unit 200 is in the release position, and in Fig. 7B, the lock unit 200 is in the lock position.

Referring to FIG. 7A, the lock unit 200 is disposed inside the axle 110, and the second cam 220 is in contact with the second fixing member 190. The second cam 220 includes two first convex portions 221 (see FIG. 3) and two first concave portions 222. The second fixing member 190 may have a structure corresponding to the second cam 220 at the other end in the axial direction. For example, at the other end of the second fixing member 190, two first concave portions 191 corresponding to the first convex portion 221 and the first concave portion 222 and two second concave portions 191 corresponding to the first concave portion 222 192 may be formed. The first convex portion 221 of the first cam 210 is inserted into the second concave portion 191 of the second fixing member 190 when the lock unit 200 is in the release position, The second convex portion 192 of the second fixing member 190 is inserted into the first concave portion 222 of the first fixing member 210.

In this state, the lock unit 200 rotates to move from the release position to the lock position. As the lock unit 200 rotates, the second cam 220 rotates. The rotation of the second cam 220 causes the second convex portion 192 of the second fixing member 190 to come out of the first concave portion 222 of the second cam 220, And faces the convex portion 221. Thereby, the second fixing member 190 moves to the left along the axial direction.

8A and 8B schematically show the positional relationship between the second prevention cap 172 and the second fixing member 190. FIG. 8A is a sectional view of the second prevention cap 172 when the locking unit 200 is in the release position. 8B shows the positional relationship between the second fixing member 172 and the second fixing member 190 when the locking unit 200 is in the locking position, . Referring to FIGS. 2, 3 and 8A, a projection 193 protruding toward the second prevention cap is formed in the second fixing member 190 along the axial direction. A groove 174 corresponding to the projection 193 is formed in the insertion portion 173 of the second prevention cap 172. The cross section in the direction intersecting the axial direction of the projection 193 may have a polygonal shape. For example, the cross-sectional shape of the projection 193 may have a triangular shape. The cross-sectional shape of the groove 174 corresponding to the projection 193 may also have a triangular shape.

When the lock unit 200 is in the release position, the projection 193 of the second fixing member 190 is spaced apart from the groove 174 of the second prevention cap 172 along the axial direction. In this case, by rotating the second prevention cap 172, it can be separated from the end of the axle 110.

On the other hand, when the lock unit 200 is in the locked position, the second fixing member 190 moves in the direction of approaching the second prevention cap 172 along the axial direction, 193 are inserted into the grooves 174 of the second prevention cap 172. The second fixing member 190 moves in the axial direction and is fixed to the axle 110 so as not to rotate. Since the projection 193 of the second fixing member 190 which is not rotated is inserted into the groove 174 of the second prevention cap 172, the second prevention cap 172 can not be rotated. Therefore, when the lock unit 200 is in the locked position, it is possible to prevent the second preventive cap 172 from being separated from the other end of the axle 110 by rotating it.

On the other hand, a lock unit 200 is rotatably installed inside the axle 110. The lock unit 200 is rotatable between a lock position and a release position in a state in which a key is inserted into the keyhole 201. The lock unit 200 may have various lock structures. As an example, the lock unit 200 may utilize a rotary cylinder lock structure.

FIG. 9A is a cross-sectional view of the axle 110 of FIG. 2 taken along line IX-IX, showing an example in which the lock unit 200 has a cylinder lock structure. 9B shows a state in which a key is inserted into the key hole 201 of the lock unit 200 in FIG. 9A, FIG. 9C shows a state in which the key is rotated in FIG. Respectively. 9A shows the lock unit 200 in a locked position.

9A, the lock unit 200 includes an inner tube 230 rotatable with respect to the axle 110 and formed with a keyhole 201, a rotary tumbler 240 (not shown) rotatably supported by the inner tube 230, ). A locking bar 250 is disposed between the inner tube 230 and the axle 110. The locking bar 250 is formed to extend in the axial direction. The inner tube 230 is formed with an insertion portion 231 into which at least a part of the locking bar 250 is inserted. In the state of Fig. 9A, the inner tube 230 can not be rotated. This is because the other end 252 of the locking bar 250 is restricted from moving radially inwardly by the rotary tumbler 240 so that one end 251 of the locking bar 250 is engaged with the groove 113 of the axle 110 ). ≪ / RTI >

Referring to FIG. 9B, a key is inserted into the keyhole 201. The key contacts the interference member 242 formed in the rotary tumbler 240 to rotate the rotary tumbler 240 about the rotation axis A by a predetermined angle. As the normal key is inserted into the keyhole 201, the rotary tumbler 240 rotates and an angle 241 formed on the outer circumferential surface of the rotary tumbler 240 is positioned on the upper portion of the locking bar 250.

In this state, when the key is rotated, the locking bar 250 exits the groove 113 by the inclined portion formed at the one end portion 251 and rises inward in the radial direction. At this time, the other end 252 of the locking bar 250 is inserted into the recess 241. The locking bar 250 of the inner tube 230 can be released from the groove 113 of the axle 110 and the inner tube 230 can be rotated. At this time, the rotary tumbler 240 is rotated together with the inner tube 230.

10A and 10B are cross-sectional views schematically showing an operating state of the locking device of the wheel according to the rotational position of the lock unit 200. Fig. For the sake of convenience of explanation, the remaining components of the lock unit 200 are omitted from illustration.

Referring to FIG. 10A, the lock unit 200 is positioned at the release position, and the first fixing member 180 is not protruded beyond the opening 115 of the axle 110. The first fixing member 180 is not inserted into the groove 132 formed between the protrusions 131 of the hub 130 so that the hub 130 is fixed to the axle 110 by the ball bearing B, Respectively. Since the first concave portion 222 of the second cam 220 is inserted into the second convex portion 192 of the second fixing member 190, the projection 193 of the second fixing member 190 Is not inserted into the groove 174 of the second prevention cap 172. Since the projection 193 does not restrict the rotation of the second prevention cap 172, the user can easily separate the second prevention cap 172 from the other end of the axle 110 by rotating it.

Referring to FIG. 10B, when the user wishes to mount the bicycle, the user can insert the key into the keyhole of the lock unit 200 to rotate the lock unit 200 from the released position to the locked position. As the lock unit 200 is in the locked position, the first fixing member 180 contacting the first cam 210 is moved outward along the radial direction. Since the first fixing member 180 is inserted into the groove 132 formed between the projections 131, the rotation of the hub 130 is restricted. In addition, the second fixing member 190 contacting the second cam 220 is moved in the direction of the second prevention cap 172 along the axial direction. The protrusion 193 of the second fixing member 190 is inserted into the groove 174 of the second prevention cap 172. The projection 193 of the second fixing member 190 and the groove 174 of the second prevention cap 172 have a polygonal sectional shape. The rotation of the groove 174 of the second prevention cap 172 is restricted by the protrusion 193 of the second fixing member 190 so that the detachment of the second prevention cap 172 from the axle 110 is restricted do. Accordingly, in a state where the bicycle is stationary, the third party can not rotate the tire 150 connected to the hub 130 without permission, and also the second prevention cap 172 can not be separated.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims.

10: main body 21, 22: wheel
30: chain wheel 31: driven wheel
41, 42: paddle 50: crank arm
110: Axle 112a: First thread
113: groove 115: opening
130: hub 131:
132: Home 140: Load
150: Tire 171: First prevention cap
172: second prevention cap 173:
173a: second screw thread 174: groove
180: first fixing member 181: one end
182: the other end portion 190: the second fixing member
191: second concave portion 192: second convex portion
193: projection 200: locking unit
210: first cam 220: second cam
221: first convex portion 222: first concave portion
230: inner tube 231:
240: rotary tumbler 241:
242: interference member 250: locking bar
251: one end 252: other end
Key: Key

Claims (10)

An axle fixed to the frame;
A hub rotatable about the axle;
A first prevention cap which is fixed to one end of the axle and which prevents the hub from being separated in the axial direction of the axle with respect to the axle and a second prevention cap which is detachably installed at the other end of the axle, A detachment cap including:
A lock unit installed inside the axle, the lock unit being rotatable between a lock position and a release position by a key;
A first fixing member which is moved in a radial direction during rotation of the lock unit to prevent rotation of the hub; And
And a second fixing member which is moved in the axial direction of the axle when the lock unit is rotated to prevent the second prevention cap from being separated from the other end of the axle,
The lock unit includes:
And a first cam that contacts the first fixing member and moves the first fixing member in a radial direction in accordance with the rotation. The method according to claim 1,
Wherein the axle is formed with an opening through which the first fixing member can pass so that the first fixing member can move in the radial direction,
And at least one groove into which the end of the first fixing member can be inserted is formed inside the hub. 3. The method of claim 2,
When the lock unit is in the locked position, the end of the first holding member is inserted into the groove of the hub,
And an end of the first fixing member is detached from the groove of the hub when the locking unit is located at the release position. delete The method according to claim 1,
The lock unit includes:
And a second cam which is in contact with the second fixing member and moves the second fixing member in the axial direction in accordance with the rotation. The method according to claim 1,
Wherein one of the second fixing member and the second prevention cap includes an axially protruding projection,
And the other of the second fixing member and the second prevention cap includes a groove corresponding to the projection. The method according to claim 6,
When the lock unit is in the locked position, the projection is inserted into the groove,
Wherein the projection is detached from the groove when the lock unit is located at the release position. 8. The method of claim 7,
Wherein the projection has a cross-sectional shape of a polygonal shape. The method according to claim 1,
Wherein the lock unit uses a rotary cylinder lock scheme. The steering system according to any one of claims 1 to 3 and 5 to 9, which is provided on at least one of the front wheel and the rear wheel, and a steering frame for adjusting the directions of the front wheels, rear wheels, And a locking device for the wheel.

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