JPS5810856Y2 - bicycle lock - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a bicycle lock that is attached to the fork of a bicycle, two-wheeled motor vehicle, etc. to lock the wheels.

Most conventional bicycle locks are sheet metal locks that are unlocked by inserting a sheet metal key with several recesses, but because the key hole is large, it can be easily unlocked by a screwdriver.
The recess on the main body side for attaching to the fork is shallow, so you can move it relatively easily by hitting the main body with a hammer, and the lock can be released by moving the lock rod to the outside of the spoke.

This invention incorporates a cylinder lock into the bicycle lock to prevent unauthorized unlocking, and secures the locked state by deepening the concave part of the main body to prevent rotation, which is different from conventional bicycle locks. They succeeded in eliminating the above drawbacks.

In the embodiment shown in the drawings, reference numeral 1 denotes a main body in the form of a horizontally long rectangular parallelepiped, and a circular space 2 is punched out in the longitudinal direction of the upper half from the back (left side) to near the front, and small grooves are formed in the lower corners of both sides of the main body. 3, 3, a large approximately semicircular recess 4 perpendicular to the longitudinal direction is provided in the center of the lower half of the main body, and a clasp 5 having a approximately semicircular recess 6 is directed opposite to this recess. Ru.

7 is a bicycle fork, one half of this fork is placed in the recess 4 of the main body, the other half is covered with the recess 6 of the stopper, and two screws 8, 8 are inserted from the underside of the space 2 of the main body, and the stopper 5 is inserted. , insert a screwdriver (not shown) into the through holes 9, 9 drilled on the upper surface of the main body, tighten the stopper 5 with these screws 8, 8, and connect the main body and the four parts 4.6 of the stopper to the fork 7.
firmly attach main body 1 to the fork by pinching it.

In order to accommodate half of the fork 7 in the recess 4 of the main body, the main body 1 is made to have a considerable thickness in the direction perpendicular to the fork.

S is a cylinder lock that is inserted into the cavity 2 of the main body, and the lock rod 11 is fixed on the front end face of the cylinder case 10 that reaches the front of the cavity 2 so as to protrude from the front of the body 1. Lock rod 1 inside
1 is wound with a push spring 12 to apply a force to the lock lever to retreat, and the protrusions 13, 13 on the lower corners of both sides of the cylinder case are applied.
is engaged with the hollow grooves 3, 3 to prevent rotation.

Numeral 14 is a plug that fits into the cylinder case 10. Several slits are cut in the upper and lower walls and the tumbler pieces 15 are inserted one by one into the plug. Normally, each tumbler piece is inserted into the upper falling groove of the cylinder case 10 ( When a predetermined key 17 is inserted into the lock hole 16, each tumbler piece is pressed down by the tooth profile of the key, and its lower edge is once inserted into the lower groove. (not shown), it rises due to the elasticity of a spring (not shown) and aligns with the circumferential surface of the plug 14, and when the key 16 is turned, the plug 14 can be rotated.

18 is a dowel pin driven into the cylinder case 10,
It engages with the concave groove 19 of the plug to stop its removal and to regulate the rotation angle.

20 is a sliding hole provided at the front end of the cylinder case 10;
When the lock rod 11 assumes the locked state shown in FIG.
Then, the spring 22 and the claw piece 23 are inserted into the sliding hole 20, and the eccentric pin 24 provided on the front end surface of the plug 14 is engaged with the elongated hole 25 on the back surface of the claw piece 23.

The claw piece 32 is always pushed down by the spring 22, but the pin 25 of the plug prevents it from being pulled out, and when the lock lever 11 assumes the locking position, the arc-shaped claw tip slightly enters the drop-in hole and the cylinder case 10 When the plug 14 rotates and the pin 25 pushes up the claw piece 24, the tip of the claw comes out of the drop-in hole 21 and the claw piece 24 fits into the sliding hole 20, so that the cylinder case 10 and the lock rod are 11 is pushed back by the push spring 12, and the lock rod 11 is retracted into the main body 1, as shown in FIG. 5, to be in the unlocked state.

Reference numeral 26 denotes a dovetail groove punched out in the lower half of the back of the main body 1, into which a locking piece 27 having a protruding piece 28 at the lower end and a concave arc-shaped upper edge is fitted into the dovetail groove. A spring 29 is interposed in the recess on the inner surface of the locking piece to constantly push up the locking piece 27 and press the arc-shaped upper edge of the locking piece to the lower edge of the cylinder case 10.

Reference numeral 30 denotes a recess provided at the lower edge of the front end of the cylinder case 10, and when the lock rod 11 is unlocked and inserted into the main body 1, the upper edge of the locking piece 27 is recessed into the recess 30 as shown in FIG. , and catches the lower edge of the claw piece 23 to prevent the cylinder case 10 from being pulled out from the main body 1 .

Note that in this unlocked state, by hooking a fingertip onto the protruding piece 28 and pushing down the locking piece 27, the cylinder case 10 and the lock rod 11 can be removed from the main body 1.

Reference numeral 31 denotes a sealing plate with adhesive, which is attached to a shallow recess on the upper surface of the main body 1 to close the driver holes 9, 9.

One embodiment of the present invention has the above-mentioned configuration, and is commercially available in the unlocked state shown in FIG. Remove the rod 11 and push spring 12 from the main body 1, peel off the seal plate 31 to expose the through hole 9.9, and loosen the screws 8, 8 with a screwdriver connected to the through hole to connect the main body 1 and the stopper 6. To separate.

Next, fit half of the fork 7 into the recess 4 of the main body, cover the remaining half with the recess 6 of the stopper, and tighten the stopper 5 by turning the screws 8, 8 with a screwdriver passed through the through holes 9, 9. The main body 1 is fixed to the fork by clamping the fork with the recesses 4 and 6 of the stopper.

Since the main body 1 houses half of the fork 7 in the recess 4, it will not move even if the main body 1 is hit with a hammer, so the lock 1 will not move.
1 can be reliably prevented from shifting to the outside of the spoke and being unlocked.

When the main body 1 is fixed to the fork, the seal plate 31 is attached to close the through holes 9, 9 as shown in FIG. When the claw piece 23 finishes entering the space 2, the locking piece 27 is released and its upper edge is inserted into the recess 30 of the cylinder case, and the claw piece 23 is received and the main body 1 of the cylinder case 10 is inserted. When the main body 1 is in the unlocked state, the fork 7
Fixed to.

When the cylinder case 10 is pushed into the main body from this unlocked state, the lock rod 11 protrudes from the main body 1 as shown in FIG. The cylinder case 10 is pushed down and the tip of the toe enters the drop-in hole 21, thereby preventing the cylinder case 10 from retreating and securing the locked state.

At this time, each tumbler piece 15 of the plug faces the upper and lower falling grooves, so that the key 17 can be removed.

When attempting to unlock, insert the key 17 into the lock hole 16,
Align each tumbler piece 15 with the circumferential surface of the plug 14 and press the key 17.
When the plug 14 is turned, the pin 24 at the tip pushes up the claw piece 23, pulls the claw out of the drop-in hole 21, and slides the plug 14 into the sliding hole 20.
5, the cylinder case 10 and lock rod 11 are pushed back by the push spring 12, and the lock rod 11 sinks into the sliding hole 20 of the main body to be in the unlocked state, as shown in FIG.

The above is an explanation of one embodiment of the present invention, and the present invention is not limited to this embodiment, and the design can be changed within the gist of the invention.

In this invention, the main body is made into a horizontally long rectangular parallelepiped, a cylinder lock is inserted into the space in the upper half, a lock rod integrated with the cylinder case is made to protrude from the front of the main body, and a spring is applied to the lock inside the space. Insert the spring and claw piece into the sliding hole made in the front end of the cylinder case, and when locking, insert the claw tip into the drop hole of the main body, and then push the eccentric pin of the plug that fits into the cylinder case with the claw piece. By engaging with the elongated hole in the piece, and by adopting this structure, the cylinder lock is incorporated into the bicycle lock, and it is possible to reliably prevent unauthorized unlocking that occurs with conventional sheet metal locks. Cut a dovetail groove in the lower half and insert the spring and locking piece, and when unlocking, push the upper edge of the locking piece into the recess on the bottom of the cylinder case to receive the pawl piece and press down the locking piece. The cylinder case can be removed from the main body. In this state, insert a screwdriver through the hole on the top of the main body and connect the main body and the stopper.
Since the screws in the book are turned, the main body can be easily attached to the fork of a bicycle or two-wheeled motor vehicle, and since there is a recess in the lower half of the main body to accommodate half of the fork, the main body can be attached with a hammer. It does not move even when struck, so there is no risk of the lock being unlocked by shifting the lock to the outside of the spoke, unlike conventional products.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the embodiment in a locked state, FIG. 2 is a rear view seen from the right side of FIG. 1, and FIG. FIG. 4 is a sectional view taken along line BB in FIG. 1, and FIG. 5 is a longitudinal sectional view of the embodiment in an unlocked state. In addition, 1 is the main body, 2 is a cavity, 4 and 6 are recesses, 5 is a stopper, 7 is a fork, 8 is a screw, 9 is a through hole, S is a cylinder lock, 10 is a cylinder case, 11 is a lock lever, 12 is a push spring, 14 is a plug, 20 is a sliding hole, 21 is a drop-in hole, 22 is a spring, 23 is a claw piece, 24 is an eccentric pin, 25 is a long hole, 26
is a dovetail groove, 27 is a locking piece, 29 is a spring, 30 is a recess, 31
is a seal plate.

Claims (1)

[Scope of utility model registration request] A cylinder lock is inserted into the upper half of the main body, which is made into an oblong rectangular parallelepiped, by punching out a circular hole in the longitudinal direction, and a recess into which half of the fork is placed is formed in the lower half of the main body and the opposing stopper. Connect the stopper to the main body with two screws inserted from the holes in the main body, make a hole in the top of the main body for the screwdriver to turn these screws, attach a seal plate, and attach the lock that is integrated with the cylinder case. A push spring is protruded from the front of the main body and wrapped around the lock rod in the hollow space, and the spring and pawl piece are inserted into the sliding hole provided at the front end of the cylinder case, and a drop hole is provided to receive the nail tip when the lock is locked. The eccentric pin provided on the front end surface of the plug that is bored into the main body and fitted into the cylinder case is engaged with the elongated hole of the claw piece, and a dovetail groove is cut in the lower half of the back of the main body to mount the spring and locking piece. The bicycle lock is characterized in that a recess is provided on the lower edge of the cylinder case, into which the upper edge of the locking piece enters and receives the claw piece when the lock is inserted and unlocked.