JP2006028764A - Dead bolt fixing mechanism for lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of needing to make a lock which withstands break-in more powerfully considering the break-in strength of a conventional lock with the increase of crimes by lock breaking in recent years, among which lock breaking by breaking in a dead bolt of a locked lock using a bar has increased, and furthermore needing to make the lock positively locked and unlocked without causing malfunction in locking/unlocking operation. <P>SOLUTION: A tumbler which puts the dead bolt in and out is additionally provided with a locking cam, and the locking cam moves a locking block to the rear of the dead bolt according to the movement of the tumbler. The locking block is held between the rear part of the dead bolt and a lock case to realize a dead bolt fixing mechanism powerfully withstanding break-in of the dead bolt with no fear of malfunctioning. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    This is a technique for increasing the strength against the pushing-in of the dead bolt.

The structure of a conventional dead bolt fixing mechanism will be described with reference to FIG.
FIG. 2 shows a general dead bolt fixing mechanism.
When the dharma is turned, the dead bolt is pushed out. When the dharma is finished turning, the dead bolt protrudes completely, and the locking bar is lowered to prevent the dead bolt from being pushed.
3-092277

The problem of the conventional mechanism will be described.
The prevention of pushing in the dead bolt is prevented in cooperation with the locking bar and the dead cam of Dharma. However, in recent years, the number of rough ones that add a strong breaking force increases, and a stronger dead bolt pushing strength is considered necessary.

The problem of operability of the conventional mechanism will be described.
When unlocking, when the Dalma is turned to the unlocking side, the locking pin is pushed onto the Dartma's dead cam, and the locking bar is pushed against the locking pin, and at the same time the dead bolt is released, the dead cam retracts the dead bolt.

If the operation of the locking bar becomes awkward, or if the operation of the locking pin becomes awkward, the locking bar will not go down during locking and the dead bolt cannot be fixed.
Those who use the lock are unlikely to notice that it has become awkward.
If the lock is locked while being astringent, the dead bolt will be pulled in just by lightly pushing the dead bolt.

  The same problem may occur even if the operation of the locking bar spring that pushes out the locking bar or the locking pin spring that pushes back the locking pin becomes less comfortable.

In Japanese Utility Model Laid-Open No. 3-92277, there is a technique that works in the same manner as the locking block of the present invention.
However, in the actual utility model 3-92277, the operation for locking is two touches, whereas in the present invention, there is a great advantage that only one touch is required.

    As an anti-crime measure, it is a challenge to realize a dead bolt fixing mechanism that is easy to operate and can withstand the push-in push of a dead bolt using a broken bar, etc. is there.

    The dead bolt fixing mechanism of the invention will be described with reference to FIG. By moving the locking block (10) to the rear of the dead bolt (2) protruding at the time of locking by a key lock or thumb turn operation, and inserting the locking block between the rear of the dead bolt (12) and the lock case box (1) in a wedge shape Prevent push-in of the dead bolt.

The locking block is stronger in shape than the conventional locking bar.
Since the locking block is sandwiched between the dead bolt and the lock case box, the lock case box itself prevents the dead bolt from being pushed in, and a large dead bolt fixing strength can be obtained.
When the conventional lock is pushed into the dead bolt, a force is applied to the locking bar, and a force is applied to the locking bar shaft to deform them, so that a high structural strength can be obtained.

The combination of parts will be described with reference to FIG.
A dart cam (7) for moving the dead bolt (2) and a locking cam (8) for moving the locking block (10) are provided in the dharma (5) having a bearing hole (6) for combining the cylinder shaft and the thumb turn shaft. Although the locking block and the locking cam are connected via a connecting shaft (9) in the drawing, they may be directly connected.

The movement of the component will be described with reference to FIG.
When the key or thumb turn is turned to the locking side, the dharma turns, and the dharma's dead cam (7) pushes out the dead bolt (2). At the same time, the dharma's locking cam (8) moves the locking block (10) to the rear of the dead bolt. .

Only by that, the locking block hits the rear end of the dead bolt, and the locking block cannot be moved to the rear of the dead bolt.
Therefore, an idler taper (4) is provided in the locking bar connecting portion of the dead bolt so that the locking block comes to the rear of the dead bolt after the dead bolt has completely protruded. The play taper portion is the rotation play angle (13) of the dead cam.

Even after the dead cam (7) completely protrudes the dead bolt (2), the dharma (5) rotates by the amount of the play taper (4), and the locking block (10) is moved to the rear of the dead bolt by the dartma rotation for the play taper. Move.

  Nevertheless, when the rear end of the dead bolt and the corner of the locking block hit, the taper angle (3) is provided at the rear end of the dead bolt or the taper angle is provided at the corner of the locking block (14). FIG. 1B shows the locked state.

    For unlocking, when the key or thumb turn is turned to the unlocking side, the dharma rotates. First, the dartma's dead cam (7) is idled by the rotational play angle (13), and then the dead bolt is retracted. At the same time, the locking cam (8) rotates without play due to the rotation of the dharma, and the locking block (10) is moved from the rear of the dead bolt before the dead bolt starts to be retracted by the rotational play angle (13) of the dead cam. It will be unlocked.

In the locking mechanism of the present invention, the dharma locking cam (8) and the locking block (10) are connected by the connecting bar (9) and are not separated.
Further, the Dharma dead cam (7) and the dead bolt (2) are connected with the rotation angle of the dead cam and are not separated.
For this reason, even if the operation of each part becomes astringent or the operation of the spring becomes astringent, the operation becomes heavy and there is no malfunction.

When the dead bolt of the locked lock is pushed in using the bar by the drobo, the lock provided with the mechanism of the present invention can withstand stronger than the conventional lock.
In addition, it can be locked and unlocked reliably even if the operation becomes awkward due to rainwater, dust, salt, oil solidification, deformation of parts, etc. after many years of use.
Even if the operation becomes awkward, the lock will not malfunction, and can be locked and unlocked by simply turning the key or thumb turn with a strong force.

The dead bolt fixing mechanism of the present invention can be used for many types of locks having a dead bolt.
The locking / unlocking operation and the movement of parts using the dead bolt fixing mechanism of the present invention will be described with reference to FIGS.

For locking, when the key or thumb turn is turned in the locking direction, a dharma rotates, pushing out the dead bolt and moving the locking block toward the rear of the dead bolt.
When the dead bolt protrudes completely, the locking block is not in between the dead bolt and the lock case.

After that, by continuously turning the key and thumb turn, the dharma rotates by the rotation angle of the dead cam by the play taper, but the dead bolt does not protrude further.
The locking block moves along with the rotation of the dharma and stops at the position sandwiched between the rear of the dead bolt and the lock case. This state is a locked state, and is a state that can withstand a strong force even when the dead bolt is pushed in.

For unlocking, turn the joint key or thumb turn in the unlocking direction to rotate the dharma, and move the locking block from behind the dead bolt and between the lock case.
Meanwhile, the dead bolt does not move and retracts depending on the rotation angle of the dead cam.
When the locking block moves, the dead cam's rotational play ends, and the dead bolt continues to be pulled by turning the key and thumb turn.
The locking block moves further as the dead bolt is retracted.

A. The lock structure of the invention is shown and the unlocked state is shown. B. Indicates the locked state. A. The conventional lock structure is shown and the unlocked state is shown. B. Indicates the locked state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lock case box 2 Dead bolt 3 Taper angle 4 Play taper 5 Dalma 6 Bearing hole 7 Dead cam 8 Locking cam 9 Connection shaft 10 Locking block 11 Click spring 12 Dead bolt rear part 13 Rotating play angle of the dead cam 14 Locking block corner 21 Lock case box 22 Dead Bolt 23 Dharma 24 Bearing Hole 25 Dead Cam 26 Locking Pin 27 Locking Bar 28 Locking Pin Spring 29 Locking Bar Spring 30 Locking Bar Shaft

Claims (1)

In addition to the dead cam (7) for inserting and removing the dead bolt (2), the locking cam (8) is provided in the dharma (5) for assembling the cylinder and thumb turn. The dead bolt rear part (12) and the lock case box (1) protruding during locking The locking block (10) that enters the wedge shape to prevent the pull-in of the dead bolt is provided. When the lock is locked by turning the key or thumb turn, the dharma turns and the dead bolt is pushed out. The dead bolt fixing mechanism of the lock is characterized by moving to the rear and preventing the withdrawal of the dead bolt.