JPH0972136A - Preventive device against forgetting to lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent forgetting to lock, by fitting a preventive device against forgetting to lock, provided with a loudspeaker, an electric circuit board, a mercury switch, and a battery, to a lug of a door lock and switching on at the unlocking time to sound a music. SOLUTION: A loudspeaker 3, a mercury switch 4, an electric circuit board 5 to sound musics, and a battery 6 are fixed to a body 9 having fitting holes for attaching on a lock, in order to form a preventive device against forgetting to lock. The fitting holes of the body 9 are fitted to the lug of a door lock and stuck with a both face-adhesive tape 10 so that the fitting holes become horizontal against the ground face. In this time. the mercury switch 4 is put off in the state the fitting holes are horizontal and also it is set to put on when it becomes vertical. When the lug of lock is turned 90 degrees on opening the door, the body is also turned 90 degrees and the mercury switch 4 is put on and the circuit board 5 sounds a music to inform that the door is opened. And hence, it prevents forgetting to lock.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key-lock forgetting device for preventing a user from forgetting to lock a key by playing music when the door is unlocked.

[0002]

2. Description of the Related Art Conventional locks have been confirmed to be locked by visual inspection or by grasping and turning a door knob.
For this reason, after a while, I was worried about whether I really locked the door and sometimes went back to the door.

[0003]

Therefore, in addition to looking at the lock and grasping and turning the door knob, music is played when the door is unlocked to notify that the lock is open. I don't want to go back in front of the door because I worry about it being locked. The present invention was invented to prevent such forgetting of lock.

[0004]

[Means for Solving the Problems] This device is equipped with (9) body, (6) battery, (3) speaker, (5) circuit board for playing music, and (4) mercury switch is key. It is attached so that the switch does not turn on when is closed. The present invention is a lock forgetting prevention device having the above configuration.

[0005]

As shown in FIG. 3, the knob of the (11) lock is inserted into the mounting hole for the (2) lock, and (9) the main body is attached to the lock. When unlocking the door (11) Rotate the lock knob 90 °. Then, (9) the main body also rotates 90 °, and (4) the mercury switch is turned on and the music flows.

[0006]

EXAMPLES Examples of the present invention will be described below. (B) As shown in FIG. 2, this device has (6) batteries in (9) main body,
(3) A speaker and (5) a circuit board for playing music are attached, (4) The mercury switch is in the closed position, that is, (2) the mounting hole for the lock is parallel to the ground. It is mounted so that the switch does not turn on at times. (B) When using this device, as shown in FIG. 3, (2) insert the knob of the lock into the mounting hole for the lock, (10) attach the main body to the lock with double-sided tape (9). Since the present invention has the above-described structure, when the door is unlocked (11), the lock knob is rotated 90 °. Then
(9) The main body also rotates 90 ° (4) The mercury switch is turned on (5) Current flows through the circuit board and music flows. (4)
Instead of the mercury switch, (11) another switch may be used as long as the current can be turned on and off as the lock knob rotates. If a buzzer is used instead of (5) circuit board and (3) speaker, it can be used for crime prevention. Also, if the number of speakers is increased and attached to the outside of the door, it becomes easier to listen to music even outside the door.

[0007]

[Effects of the Invention] By simply attaching this device to the lock of the existing door, the switch is turned on when the lock is released, music is played, and the lock is opened to prevent forgetting to lock.

[Brief description of drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a structural diagram of the present invention.

FIG. 3 is a perspective view showing a use state of the present invention.

[Explanation of symbols]

 1 speaker part 2 mounting hole for 3 locks 3 speaker 4 mercury switch 5 circuit board 6 battery 7 battery holder 8 lead wire 9 main body 10 double-sided tape 11 lock knob 12 door knob 13 locks

Claims (1)

[Claims] 1. A device for forgetting to lock the key, which is switched on when the lock is released and music is played by simply attaching the device to an existing door lock.