JPH01154979A - Locking device - Google Patents

Abstract

PURPOSE: To easily judge the locking by molding a magnet on a predetermined position of a lock, a display circuit on a grip part of a key, and a sensor for switching on the display circuit in locking and switching off the same in unlocking. CONSTITUTION: The magnetic sensors 3, 4, a flip-flop circuit 5, a light emitting diode 6 and a battery 7 are integrally molded on the recessed parts of a grip part 2a and an insertion part 2b of a key 1. The lock is also provided with a magnet 10 located in opposition to the sensor 3 when the key 1 is inserted into an insertion hole 8a and rotated right by 90 deg.. When the key 1 is inserted and rotated right by 90 deg. for locking, the sensor 3 senses the magnetic field of the magnet 10, sets the circuit 5, energizes the diode 6, and keeps the display even when the key 1 is drawn out from the lock. Whereby the locking state can be confirmed from a far place, and the anxiety can be solved.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a locking device consisting of a key and a lock, and in particular to a structure in which the locked state can be determined by visually observing only the key. It is related to.

(Prior art) As is well known, entrances and exits of buildings such as houses and offices are
〜A is provided, and these 1 through A are equipped with locks that can be locked from the outside (-1).Such doors are used when family members go out or employees leave, etc. The lock is locked from the outside with a key to prevent theft.

(Problem to be Solved by the Invention) However, the only way to check whether or not the lock is secure is to directly move the lock knob or door.

Therefore, it is not possible to check the locked state at a place far away from the lock, and the fear of theft occurring due to forgetting to lock the lock remains for a long time, and there are cases where it is difficult to deal with this problem.

Therefore, an object of the present invention is to be able to determine the locked state by visually observing the key carried after the lock is locked.
To provide a locking device capable of eliminating the occurrence of anxiety.

[Structure of the invention]

(Means for Solving the Problems) The present invention consists of a key and a lock, a magnet is molded in a predetermined position on the key, a display circuit is molded on the handle, and
A sensor that faces the magnet and provides a signal to keep the display circuit in the ON state when the door is locked, and a sensor that faces the magnet and provides a signal to keep the display circuit in the OFF state when the door is unlocked are molded into the insertion part. .

(Function) When a key is inserted into the lock to lock it, one sensor faces the magnet and gives a signal to keep the display circuit in the ON state, and even if the key is removed after being locked, the key can be visually checked. The locked state can be confirmed from this, and when the lock is set to the unlocked state, a signal is given to keep the display circuit in the OFF state, and the unlocked state can also be confirmed by visually observing the key.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows a key for one embodiment of the invention.

In the same figure, a key 1 is formed of a metal material and has a grip portion 2a.
and a lock main body 2 having an insertion part 2b into the lock, and an insertion part 2
magnetic sensors 3 and 4, such as Hall elements, which are provided in b and detect locked and unlocked states, and a flip-flop 5 which maintains the states detected by the magnetic sensors 3 and 4, respectively;
A light emitting diode that displays the output of this flip-flop 5
1z6 and a battery 7 that serves as a power source for these.
These are integrally molded with an insulating material into four parts or notches (not shown) provided in the grip part 2a and the insertion part 2b.

The lock also has an insertion hole 8a for the key 1 as shown in FIG.
(The position 11 when inserting and removing the key 1 is shown by the dotted line) Support part (knob or independently provided) 9 of the rotating part 8
A magnet 10 is provided at a position facing the magnetic sensor 3 of the key 1 when the key 1 is inserted into the insertion hole 8a, rotated 90 degrees to the right, and locked. In this magnet 10, a recess 9a is provided in the support portion 9, and the magnet 10 is integrally molded with an adhesive.

Next, the operation of the locking device configured as above will be explained. First, as shown in FIG. 2, when the key 1 is inserted and rotated 90 degrees to the right from the dotted line position to the locked state, the magnetic sensor 3 senses the magnetic field of the magnet 10 provided on the lock side. The flip-flop circuit 5 is set to cell 1. Therefore, this output causes the light emitting diode 6 to emit light, indicating that the door is in the locked state. This display is #! 1 is maintained even when it is pulled out from the lock side. Therefore, by looking at the key 1 after locking, the locked state can be confirmed even at a place far away from the lock 8. next,
As shown in FIG. 3, when the key 1 is inserted and rotated 90° to the left from the dotted line 11 to unlock the door, the magnetic sensor 4 senses the magnetic field of the magnet 10 and resets the flip-flop circuit 5. Therefore, the light emitting diode 6 stops emitting light, indicating that the door is unlocked.

Note that in the above description, a light emitting diode was used as a display element, but battery consumption can be reduced if this is used as a liquid crystal display. Furthermore, by reversing the mounting of the magnetic sensors on the locking side and the unlocking side, the light emitting diode can be caused to emit light when the lock is unlocked.

Further, in the above embodiment, the locking and unlocking is performed by rotating the key 1 by 906 degrees to the right and left, but the locking and unlocking operations can be performed in a similar manner to those that rotate the key 1 by 180 degrees.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to check the locked state even in a far away place, which not only makes it easier to deal with the situation, but also eliminates the constant fear of theft due to forgetting to lock the door. can.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a key according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing a locked state of an embodiment of the present invention, and Fig. 3 shows an unlocked state of an embodiment of the present invention. It is an explanatory diagram. 1... Key, 3, 4... Magnetic sensor 5... Flip-flop, 6... Light emitting diode 7... Battery, 9... Support part 10... Magnet

Claims (1)

[Claims] Consisting of a key and a lock, a magnet is molded in a predetermined position on the lock, a display circuit is molded on the handle of the key, and the display circuit is turned on opposite to the magnet when the lock is locked.
1. A locking device characterized in that a sensor that provides a signal to hold the lock, and a sensor that faces the magnet and provides a signal to turn off the display circuit when the lock is unlocked, are molded in the insertion portion.