JPS5825085Y2 - locking device - Google Patents

Description

[Detailed description of the invention] The invention consists of a lock body that is attached to a door of a building, for example, and a rotor that is housed in the lock body and is non-rotatably locked to the lock body by a locking member such as a pin tumbler. , attached directly to the rotor or connected to the rotor via a suitable interlocking member,
This invention relates to a locking device consisting of a latch that engages and disengages a receiver on the side of a fixed frame such as a building body.

In this type of locking device, when the key is removed from the rotor, the locking member returns to the operating position, whereby the rotor is non-rotatably locked relative to the lock body, and movement of the latch is prevented. However, if the key is left inserted in the rotor even after the door is closed, the latch is engaged with the receiver, and the door is locked to the fixed frame, the locking member will remain in the inoperative position. , the rotor is placed in a rotatable state, so if a driving force in the backward direction is applied to the latch due to some cause such as vibration, the latch will receive the driving force and move backward, releasing the receiver. By leaving, the door was unlocked.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a locking device in which, when the latch is engaged with a receiver and is in the locked position, the latch does not move blindly to the unlocked position even if the key remains inserted in the rotor. .

The gist of the locking device of the present invention will be explained below based on the drawings. is aligned with the rotation center O of the rotor 2, or is placed on the vertical line l passing through the rotation center O.

The illustrated embodiment is an application of the present invention to a known pin tumbler type cylinder lock, in which a rotor 2 rotatably housed in a shaft hole 4 of a lock body 1 is biased to slide by a compression coil spring 5. The lock body 1 is locked by a pin tumbler mechanism formed by a driven pin 6 and a driving pin 7.

An interlocking cam 8 is attached to a square hole 9 in the rear end square shaft portion 2a of the rotor 2.
An interlocking pin 10 that is fitted and protrudes from the distal end of the interlocking cam 8 is inserted into a receiving groove 11 provided at the base end of the latch 3 .

Therefore, when the key 13 is inserted into the lock hole 12 of the rotor 2 to move the bin tabler to the inoperative position and the rotor 2 is then rotated 900 times, the latch 3 is inserted into the guide hole 12.
It slides linearly in the vertical direction along , and engages and disengages from the receiver 15.

The overall center of gravity G of all movable parts such as the rotor 2, the pin tumbler mechanism such as the drive pin 7, the interlocking cam 8, the interlocking pin 10, and the key 13 is the rotation center O of the rotor 2 when the latch 3 is in the locked position. It is most preferable that it coincide with the rotation center O or be on the vertical line l passing through the rotation center O and be below the rotation center O, but in this example, it is below the rotation center O.

In order to balance the mass of moving parts with respect to the rotation center O in this way, for example, each moving part may be made of materials with different specific gravity, some moving parts may have a hollow structure, or some moving parts may be enlarged or reduced. Alternatively, a weight may be buried in the movable parts.

In this example, the interlocking cam 8 is enlarged and thickened at a portion opposite to the interlocking pin 10 with respect to the square hole 9 so as to provide a considerably large counterweight to the latch 3.

As described above, in the lock device of the present invention, the latch 3 is connected to the receiver 15.
When the latch 3 and other movable parts are in the locked position, the overall center of gravity G of the movable parts such as the latch 3 is aligned with the rotation center O of the rotor 2, or is aligned with the vertical line l passing through the rotation center O. Therefore, even if a driving force acts to move the latch 3 backward in the unlocking direction due to its own weight, vibration, etc., no rotational moment to rotate the rotor 2 is generated by this driving force.

Therefore, when the latch 3 is in the locked position, even if the key 13 is inserted into the rotor 2 and the rotor 2 is left in a rotatable state, a safe locking device is obtained in which the latch 2 does not move blindly in the unlocking direction. be.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are front and right side views of the locking device, FIG. 3 is a sectional view taken along line A-A' in FIG. 1, and FIG. FIG. 2 is a sectional view taken along line BB' in FIG. 2; 1... Lock body, 2... Rotor, 3...
...Latch, 5...Spring, 6...
Driven pin, 7... Drive pin, 8... Interlocking cam, 10... Interlocking pin, 11...
Receiving groove, 13...Key, 14...Guide hole.

Claims (1)

[Scope of utility model registration request] A lock device in which a rotor becomes rotatable relative to a lock body when a key is inserted, and the rotation of the rotor drives a latch interlocked with the rotor to engage and disengage a receiver, and the lock device engages with the receiver and locks the lock. When the latch is in the locked position, the center of gravity of the movable parts such as the latch as a whole is aligned with the rotation center of the rotor or is on a vertical line passing through the rotation center of the rotor. Locking device.