GB2239635A

GB2239635A - Motorcycle lock

Info

Publication number: GB2239635A
Application number: GB9000031A
Authority: GB
Inventors: Joei Jaw
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-01-02
Filing date: 1990-01-02
Publication date: 1991-07-10
Also published as: GB9000031D0

Abstract

A motorcycle lock includes a lock body 3 pivoted to a knuckle 2 which is fixedly secured to a front-wheel telescopic fork leg 1 of a motorcycle, an U-shaped locking bar 4 having two collars 41, 41' fixedly mounted thereon in parallel to limit its sliding in the lock body, and a lock catch 7 fixedly mounted on the opposite front-wheel telescopic fork leg 6 of the motorcycle for receiving and locking the two ends of the U-shaped locking bar when it is pivoted through an angle of 90 DEG relative to the knuckle and slid towards the fork leg 6. <IMAGE>

Description

Structure of motorcycle lock The present invention relates to a motorcycle lock for locking up the front wheel of a motorcycle with the two front telescopic springings of such a motorcycle to prevent the motorcycle from driving.

Various types of locking devices have been developed for locking motorcycles. There is a common motorcyclelockwhjch comprises a lock catch and an U-shaped locking bar separately arranged for locking up the two front springings with the front wheel of a motorcycle. Disadvantage of this type of motorcycle lock is its inconvenience in unlocking operation and storage. The lock will become useless in case of the missing of either lock catch or locking bar. There is another type of motorcycle lock which includes a lock catch fixedly secured to a front wheel springing of a motorcycle, and a separate U-shaped locking bar for connection to the fixed lock catch to lock up the two front wheel springings with the front wheel of such a motorcycle. After unlocking, the U-shaped locking bar of such a motorcycle lock must be separately received.In this type of motorcycle lock, the lock catch which is fixedly secured to a front wheel springing of a motorcycle is disposed close to the front wheel of such a motorcycle.

During driving of a motorcycle, slight deviation of the front wheel may rub against the lock catch which is secured to a front springing of such a motorcycle, and the lock catch may be destroyed easily or broken away to hit the people thereby. Further, the short moving range of the Ushaped locking bar relative to the lock catch makes its operation more inconvenient. If the range between the two front springings of a motorcycle is relative big, the size of the motorcycle lock must be relatively increased. As a conseguence of the increasing in size, the manufacturing cost is relatively increased.

The present invention is to provide a motorcycle lock which includes a lock catch fixedly secured to one of the two front springongs of a motorcycle, an U-shaped locking bar movably mounted on a lock body which is pivoted to a knuckle which is fixedly secured to the other front springing of such a motorcycle. The lock body can be rotated through an angle of 900 relative to the knuckle so that the U-shaped locking bar can be turned from a vertical position to a horizontal locking position for the insertion of its both ends into the two holes of the lock catch for lockong up the two front springings with the front wheel of such a motorcycle.

Embodiment of the invention is described by way of example, with reference to the drawings, in which: Fig. 1 is a perspective view of a motorcycle lock embodying the present invention; Fig. 2 illustrates the connection of the knuckle with the lock body; Fig. 3 is a schematic sectional view, illustrating the positioning of the U-shaped locking bar in the lock body; and Fig. 4 illustrates the motorcycle lock of Fig. 1 in a locking condition.

Turning now to the annexed drawings in greater detail and referring first to Fig.l, therein illustrated is a motorcycle lock embodying the present invention and generally comprised of a lock body (3), a knuckle (2), an U-shaped locking bar (4), a retaining plate (5), and a lock catch (7).

As illustrated, the knuckle (2) comprises a recess (22) incorporated with the retaining plate (5) for securing to a front-wheel telescopic springing (1) of a motorcycle by means of screw bolts (51). The lock body (3) is pivoted to the knuckle (2) to rotate through an angle of 900 relative to the knuckle (2), and comprises two holes (31) thereon for the insertion therethrough of the U-shaped locking bar (4).

Two collars (41) and (41') are mounted on the U-shaped locking bar (4) to confine the moving range of the U-shaped locking bar on the lock body (3). A first thrust notch (43) is made on the body of the U-shaped locking bar (4) at a suitable location, into which a lock pin (32) which is internally made on the lock body (3) may insert to prevent the U-shaped locking bar (4) from moving downward. A certain number of second thrust notches (42) are made on the both ends of the U-shaped locking bar (4) for securing to the lock catch (7), which is secured to the opposite front-wheel telescopic springing (6), when the U-shaped locking bar (4) is inserted through the front-wheel spokes into the holes (71) of the lock catch (7).

Referring to Fig. 2, the lock pin (32) is positioned in the lock body (3) and supported by a spring (33) to insert in the first thrust notch (43) of the U-shaped locking bar (4). Because the front end of the lock pin (32) comprises an upper right angle edge and a lower bevel angle edge, the U-shaped locking bar (4) is allowed to move up and down in the lock body (3) right below its first thrust notch (43).

When the U-shaped locking bar (4) is moved in the lock body (3) downward to such an extent that the lock pin (32) seats in the first thrust notch (43), the first thrust notch (43) is stopped by the upper right angle edge of the front end of the lock pin (32) to prevent the U-shaped locking bar (4) from moving downward further.

Referring to Fig. 3, the lock body (3) is hinged to the knuckle (3) and can be rotated through an angle of 900 relative to the knuckle (2). When the lock body (3) is vertically attached to the knuckle (3) under unlocking condition, a first hook member (21), which is made on the knuckle (2) and controlled to move by a knob (211), locks up with a second hook member (32), which is made on the lock body (3); to firmly secure the lock body (3) to the knuckle (2).

During locking operation, the knob (211) is pressed down to push the first hook member (21) to move away from the second hook member (32), as illustrated in the dotted line, such that the lock body (3) is released from the locking position with the knuckle (2) and can be rotated through an angle of 900 relative to the knuckle (2). Thus, the U-shaped locking bar (4) is turned from a vertical position to a horizontal position for inserting into the holes (71) of the lock catch (7) for locking. As soon as the U-shaped locking bar (4) is pressed in the lock catch (7), the front-wheel of the motorcycle is tightly locked up with the two front-wheel telescopic springings of the motorcycle and protected from rotation.

Claims

CLAIMS:

1. A motorcycle lock, including: an U-shaped locking bar, comprising a first thrust notch on its body, a plurality of second thrust notches on its ends, and a pair of collars fixedly mounted thereon in par allel with each other; a knuckle coupled with a retaining plate and fixedly secured to a front-wheel telescopic springing of a motorcycle; a lock body hinged to said knuckle to rotate within an angle of 900 and comprising two holes for the insertion the rethrough of said U-shaped locking bar; and a lock catch fixedly secured to the other front-wheel tele scopic springing of said motorcycle opposite to said knuckle and comprising two holes for locking up with the second thrust notches of said U-shaped locking bar.

2. A motorcycle lock according to claim 1, wherein said pair of collars can be stopped at the two holes of said lock body to limit the backward movement of said U-shaped locking bar relative to said lock body.

3. A motorcycle lock according to claim 1, wherein said knuckle comprises a hook member supported by a spring and controlled to move forward by a knob which is exposed outside of said knuckle.

4. A motorcycle lock according to claim 1, wherein said lock body comprises a hook member constantly hooked up with the hook member of said knuckle.

5. A motorcycle lock according to claim 1, wherein said lock 5 body is pivoted to said knuckle by means of a pin and per mitted to rotate through an angle of 900 relative to said knuckle.

6. A motorcycle lock according to claim 1, wherein said lock body comprises therein a lock pin supported by a spring to 10 seat in said first thrust notch so as to prevent said U shaped locking bar from moving downward further.

7. A motorcycle lock comprising a U-shaped locking bar having latch configurations on its limbs, a knuckle arranged to be secured to one leg of a motorcycle wheel suspension, a retainer member pivotably mounted on the knuckle, the retainer member having apertures to receive therethrough the locking bar limbs, and a latch member arranged to be secured to the other leg of the suspension, the latch member having apertures for receiving therein the locking bar limbs, and latch means for latching engagement with the latch configurations thereon.

8. A motorcycle lock substantially as herein described with reference to the accompanying drawings.