JPH041255Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a wire lock or chain lock, in which one end of a flexible locking rod made of wire or chain is attached to a lock box, and the tip is locked. This invention relates to an improvement in a bicycle lock, which is locked by a locking mechanism installed in a box, and is unlocked by inserting a predetermined key into the lock box.

BACKGROUND TECHNOLOGY This type of bicycle lock, which is used for tethering a bicycle to a fixed object or locking a tire so that it cannot be rotated, includes a wire lock constructed as in, for example, Japanese Utility Model Publication No. 11098/1983. There is.

Furthermore, a wire having one end as a fixed end and the other end as a locking end is attached to a flat lockbox, and the lock can be locked and unlocked by swinging a tumbler, as disclosed in Japanese Utility Model Publication No. 58-17883, for example. be.

Problems to be Solved by the Invention In the former wire lock, the lock box is formed into a hollow cylindrical shape to accommodate the vertical cylinder lock mechanism, so it is thick and difficult to carry and store. etc. is inconvenient. In addition, since the lock box needs to be formed three-dimensionally, die-casting is required, which makes it expensive.
Disadvantages include the fact that assembly is time-consuming, and when locking the lock, a two-touch operation is required: inserting a flexible locking rod made of wire or the like into the opening/closing part of the lock box, rotating the stopper, and closing the opening. There is.

On the other hand, the latter has the advantage of having a thinner lockbox than the former, but because the locking mechanism uses a locking mechanism in which the key is placed directly on top of the tumbler that locks the locking end of the wire, it is difficult to remove the lock from the keyhole when locking. The drawback is that it is easy for someone to accidentally try to open the lock by inserting a stick-like object. Additionally, since the tumbler and key are stacked double inside the lockbox, there is a contradiction in that increasing the thickness of each other will make the lockbox thicker, while making it thinner will weaken the locking mechanism. Another drawback is that it is difficult to strengthen the structure while maintaining its thinness.

Therefore, it has become a challenge to create a bicycle lock that maintains safety, is structurally strong, is thinner, and has good operability.

Means for Solving the Problems Therefore, the present invention has been developed to provide a lock box with a flat housing space for a lock mechanism formed between the front and back sides, into which a flexible locking rod made of wire or the like is inserted from the side. A lock opening/closing part is provided, a keyhole into which a predetermined key is inserted is provided at the other end, a pair of left and right support shafts are provided between the opening/closing part and the keyhole, and one support shaft has an inner end of the opening/closing part. A plate-shaped locking lever having a thickness substantially corresponding to the accommodation space is pivotally supported with the abutting portion thereof facing, and the tip of the locking lever is formed into a hook shape,
A locking part is provided to close the opening of the opening/closing part in place of the abutting part, and a latch part is provided on the inner edge of the locking lever that faces the locking part with the support shaft in between. A cam surface is provided on the other support shaft, and a plate-shaped stop lever having an engagement portion at its tip that engages with the cam surface is pivotally supported so as to be swingable along the rotational direction of the locking lever. ,
This stop lever is provided with a key engagement abutting part that engages with the operating part of a predetermined key inserted through the keyhole and rotates the stop lever in the opening direction, and both ends of the stop lever and the locking lever are connected to each other. To provide a bicycle lock characterized by being provided with a restoring spring that is latched and always urges a locking lever in the unlocking direction.

Function The lock of the present invention configured as described above has a pair of left and right support shafts provided in a flat lock box with one end as an opening/closing part into which a flexible locking rod enters from the side and the other end as a keyhole.
A plate-shaped locking lever with a thickness approximately corresponding to the thickness of the lock box is supported on the support shaft on the opening/closing part side, and a plate-like stop lever is also supported on the support shaft on the keyhole side. Since the two levers are engaged with each other at their edges and arranged so that their rotational directions are aligned on the same plane so as to constitute a gear train, the thickness of the lock box can be reduced to the necessary minimum thickness. Also, the key inserted through the keyhole is
Since it does not engage directly with the flexible locking rod, it is possible to use a locking lever with a thickness approximately equivalent to the accommodation space of the locking mechanism, and the locking lever is prevented from engaging with anything other than the specified key. You can prevent searches against you. Furthermore, the present invention enables locking with a new one-touch operation in which the flexible locking rod is inserted from the side into the opening/closing part of one end of the flat lockbox and the locking lever is rotated against the restoring spring. There are also things.

Embodiments Examples of the present invention will be described below with reference to the drawings.

In the figure, as shown in Figures 2 and 6, 1 is a housing space 2 for the lock mechanism formed flat by bending the peripheral edges of both side surfaces ab on the front and back sides, which are nearly rectangular, inward and stacking them facing each other. The lock box 3 is a lock opening/closing part in which one end of the lock box 1 (the left end surface in the figure) is cut out in a U shape so that the free end of a flexible locking rod Y formed of wire or the like can be inserted from the side. ,
Y' is a fixed end that fixes the flexible locking rod Y in the lock box 1, 4 is a keyhole that opens in the other end surface of the lock box 1 so that a predetermined key K can be inserted into it, and 5 and 6 are both ends on both sides. Accommodation space 2 is created by caulking to surface part ab.
Support shafts 7 are horizontally suspended within the opening and closing portions, and are provided in pairs on the left and right between the opening/closing portion 3 and the keyhole 4; A locking lever 8 is pivotably supported on the locking lever 7, which is provided so as to protrude from the inner end of the opening/closing portion 3 of the lock in the unlocked state (Figs. 1 and 4).
The abutting portion 9 is formed into a hook shape at the tip of the locking lever 7, and closes the opening 3' of the opening/closing portion 3 in place of the abutting portion 8 as the locking lever 7 rotates clockwise in the drawing. The locking portion 10 is an arcuate cam surface provided with a notched hook portion 11 on the inner edge of the locking lever 7, which faces the locking portion 9 across the support shaft 5. .

12 is a plate-shaped stop lever that is attached to the other support shaft 6 and is pivotally supported in the flat accommodation space 2 with its swinging direction aligned in the same plane as the rotation direction of the locking lever 7; An engaging portion formed at the tip of the stop lever 12 (left hand in the figure) and engaging with the cam surface 10 and the locking portion 11;
14 is provided on the other side of the stop lever 12 facing the engaging portion 13 with the support shaft 6 in between, and is an actuating portion at the tip of a predetermined key K inserted through the keyhole 4.
A contact portion 15 engages with the key K and rotates the stop lever 12 in the counterclockwise opening direction as shown in the figure. This is a restoring spring that always biases the lever 7 in the unlocking direction counterclockwise in the figure and biases the stop lever 12 clockwise in the figure.

Note that 16 in the figure is a key holding member that extends inside the keyhole 4.

In the first to third embodiments, a bifurcated key is used as the key K, and after being inserted into the lock box 1 as shown in FIG. , in which the stop lever 12 is caused to rotate in the opening direction.

In the fourth to sixth embodiments, a support shaft 5 is installed in a lock box 1 in which a housing space 2, an opening/closing part 3, and a keyhole 4 are formed by combining a pair of front and back side surfaces ab in the same manner as in the embodiment. . A stop lever 12 is provided with an engaging portion 13 and has a long rear end pivoted toward the keyhole 4. A pair of right and left raised pieces are provided on the rear end side of the stop lever 12, and these raised pieces are used to secure the key K. and the locking lever 7 and the stop lever 1.
A restoring spring 15 is installed between the keys 2 and 2, and the key holding part 16 on the keyhole 4 side has a sawtooth-shaped holding piece 19 that holds the key K inserted into the keyhole 4 when unlocking, and a pair of left and right engagement pieces. A raised guide piece 18 is provided between the contact parts 14, and the key K has a semicircular tip and serrations on both sides, making it reversible so that it can be used on both the front and back sides. This is an example of using a key.

In the unlocking operation of this embodiment, when the tip of the key K inserted through the keyhole 4 is pushed further while being guided by the guiding piece 18, the key K moves from the position shown in FIG. 5 to the sixth position.
While it rises to the position shown in the figure and is latched to the sawtooth-shaped holding piece 19, the engagement abutment part 14 that engages the actuating part K' at the tip of the key K rises together and opens to the stop lever 12. produces a rotation of direction.

In both of the above embodiments, in the unlocked state, the lock lever 12 and the holding member 16 are latched and cannot be pulled out as shown in FIGS. 1 and 4, respectively.

In this bicycle lock constructed as described above, while inserting the flexible locking rod Y from the side of the opening/closing portion 3 of the lock, the abutting portion 8 of the locking lever 7 resists the restoring spring 15.
When pushed in, the locking lever 7 rotates clockwise in the figure, and the locking part 9 rises to replace the contact part 8, closing the opening 3' of the opening/closing part 3, and closing the opening 3' of the opening/closing part 3.
As shown in the figure, the flexible locking rod Y is locked so that it cannot be pulled out.

In this locked state, the stop lever 12 is attached to the latch portion 11 of the cam surface 10 at the rotational position of the lock lever 7.
This is maintained by the engagement of the engaging portion 13 at the tip of the lever and the restoring force of the restoring spring 15 between the two levers. At the same time as this locking, the key K is moved to the stop lever 1.
2 and the holding member 16, it is released as shown in FIGS. 3 and 5, and can be carried.

To unlock the lock from the locked state, as described above, when the stop lever 12 rotates in the unlocking direction (counterclockwise in the figure) by inserting the key K, the engaging portion 13 at the tip of the stop lever 12 engages with the locking lever 7. When the locking lever 7 and the stopper lever 12 are disengaged from the stopper 11, the locking lever 7 and the stopper lever 12 are returned to their respective positions by the urging force of the restoring spring 15, returning to the unlocked state.

The bicycle lock of the present invention operates as described above. In addition to the flexible locking rod Y used in the present invention having a large-diameter head, it is also possible to use one in which the end is formed into a trap-shaped head.

Effects of the invention According to the invention configured as described above and used as described above, (1) both the locking lever 7 and the stop lever 12 are formed in a plate shape, and the respective supporting shafts 5, Since they are arranged side by side in the direction of the same rotational plane via 6, the width of the lock storage space 2 can be made extremely small, thereby making it possible to form the lock box into a thin and flat card-like body.

(2) Since the locking lever 7 that closes the opening/closing part 3 of the lock and the key K inserted from the key 4 are not directly overlapped in the lock storage space 2, the lock lever 7 that closes the opening/closing part 3 of the lock is not directly overlapped in the lock storage space 2, so the lock lever 7 is thick enough to approximately correspond to the width of the storage space 2. A durable locking lever 7 can be used.

(3) Since the stop lever 12 is interposed between the lock lever 7 and the key 4, attempts to open the lock through the keyhole 4 can be prevented.

(4) Cut out one end of the thin lock box 1 and attach the lock lever 7.
Since the lock opening/closing part 3 is provided with the abutting part 8 exposed, a new one-touch locking operation is possible in which the flexible locking rod Y is inserted into the lock box 1 from the side and locked. , giving the user a sense of novelty.

There are practical effects as described above.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.
Fig. 2 is a partially cutaway plan view, Fig. 3 is a partially cutaway front view showing the locked state of the embodiment, Fig. 4 is a partially cutaway front view of the embodiment, and Fig. 5 is the partially cutaway front view of the embodiment showing the locked state. 6 is a partially cutaway front view, and FIG. 6 is a partially cutaway right side view. 1... Lock box, a, b... Front and back side parts, 2...
Accommodation space for the lock mechanism, 3... Opening/closing part of the lock, 3'...
...Opening, 4...Keyhole, Y...Flexible locking rod,
Y'... Fixed end, 5, 6... Support shaft, 7... Locking lever, 8... Contact part, 9... Locking part, 10... Cam surface, 11... Latching part, 12... Stop lever, 13...Engagement portion, 14...Engagement contact portion, 15
...Restoration spring, 16...Key holding member, K...
Key, K'... Actuation part, 17... Fulcrum shaft, 18...
Guiding piece, 19...holding piece.

Claims (1)

[Scope of utility model registration request] A lock opening/closing part 3 into which a flexible locking rod Y formed of wire or the like is inserted from the side is provided at one end of a lock box 1 in which a locking mechanism accommodation space 2 is formed flat between the front and back side parts ab, A keyhole 4 into which a predetermined key K is inserted is provided at the other end, and a pair of left and right support shafts 5, 6 are provided between the opening/closing portion 3 and the keyhole 4, and one of the supporting shafts 5 is connected to the opening/closing portion 3. A plate-shaped locking lever 7 having a thickness approximately corresponding to the housing space 2 is pivotably supported with a contact portion 8 facing the inner end thereof, and the tip of the locking lever 7 is formed into a hook shape. A locking part 9 is provided to close the opening 3' of the opening/closing part 3 in place of the abutting part 8, and the locking part 9 and the support shaft 5 are connected to each other.
A cam surface 10 having a hooking part 11 is provided on the inner edge of the locking lever 7, which faces the locking lever 7, while an engaging part 13 that engages with the cam surface 10 is provided on the other support shaft 6 at the tip. A plate-shaped stop lever 12 formed in the same manner is pivotably supported along the rotational direction of the locking lever 7, and this stop lever 12 is provided with:
An operating part for a predetermined key K inserted through the keyhole 4
A key K engaging contact portion 14 is provided which engages with the key K and rotates the stop lever 12 in the opening direction.
A bicycle lock characterized in that a restoring spring 15 is provided at both ends of the stop lever 12 and the locking lever 7 to constantly bias the locking lever 7 in the unlocking direction.