JPS5831970Y2 - safe alarm device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an alarm device for a safe.

The present invention provides a crime prevention device that immediately alerts the user if the door of a safe is opened even slightly when the door is locked.

Conventionally, this type of alarm device has been provided with various mechanisms.

All of these devices successfully achieve the purpose of crime prevention, but they have a complicated structure, are not easy to assemble into a safe, and have the problem of high costs.

The present invention has a simple structure, ensures reliable operation, and is characterized by improvements such as detecting a door opening operation at an early stage when the door is about to be opened, and generating an early warning.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the device of the present invention, and FIG. 2 shows an electrical circuit diagram of the device of the present invention.

In FIGS. 1 and 2, 81 is the main switch, S2
S3 is a reset switch for the self-holding relay, and S3 is a fine movement switch that detects the slight movement of the locking connecting rod in the safe world in the unlocking direction.

The specific structure of the device of the present invention having these three types of detection switches will be explained with reference to FIG.
This is a plate made of synthetic resin or other insulating material and equipped with 1 to S3.

An L-shaped conductive member 2 is attached to this plate 1.

In the main switch S1, a support 3 made of a conductive material is attached to a position opposite to one side of the L-shape of the conductive member 2, and an operating shaft 4 made of a conductive material is supported on this support so as to be movable forward and backward.

The tip of the actuating shaft 4 comes into contact with the L-shaped conductive member 2 by forward movement.

The rear end of the operating shaft 4 is in contact with the tip of a lock slider 7 provided on a dial or lock 6 (hereinafter referred to as the lock).

The operating shaft 4 is always urged in the backward direction by a spring 5.

The lock slider 7 included in the lock 6 is engaged with and disengaged from the cantilever connecting rod 17 of the door perpendicular to the lock slider 7 via a stopper, and the cantilever connecting rod 17 is put into a locked state to restrain release movement of the cantilever connecting rod 17.

The support 3 supporting the operating shaft 4 is connected to a power source 19 and a connection 2.
It is set to 0.

Next, the reset switch S2 is constituted by a swinging rod 8 that comes into contact with and separates from the lower side of the L-shaped conductive member 2.

The swinging rod 8 is pivotably mounted at a fulcrum 9, and is supported by a spring 1.
The zero tensile force applies a turning force in the direction in which the tip of the swinging rod 8 separates from the conductive member 2.

11 is a stopper for the swinging rod 8.

This swinging rod 8 is configured such that when the cannula connecting rod 17 moves to the open end, the rear end of the rocking rod 8 is moved against the tension of the spring 10 by an engaging element 18 protruding from the cannula connecting rod 17. It is pushed and the tip of the swinging rod 8 comes into contact with the conductive member 2 .

The reset switch S2 having such a structure is used to release the excitation of the electromagnetic coil in the relay holding state of the self-holding relay 22, which will be described later.

Therefore, in order to provide the signal, the swinging rod 8 and the self-holding relay 22 are connected by a wire 23.

The fine movement switch S3 is also constituted by a swinging rod 12 pivotably mounted on a fulcrum 13, and a contact shaft 16 with which the tip of the swinging rod 12 comes into contact at its downward swing end.

This swinging rod 12 is attached with a spring 14 that always applies a downward swinging force, and its rear end engages with an engaging element 18 protruding from the cannula connecting rod 17.

That is, when the cannula connecting rod 17 is in the locked state, the engager 1
8 pushes down the rear end of the swinging rod against the tensile force of the spring 14, and pivots the tip of the swinging rod 12 upward to separate it from the contact shaft 16.

15 indicates a stopper at the upper turning end. This swinging rod 12 and the above-mentioned cross-shaped conductive member 2 are connected 21, and the contact rod 1
6 and a self-holding relay 22 and a wire connection 24.

The self-holding relay 22 is connected to the power supply 19 and the buzzer 25, and once the self-holding relay 22 is energized and closes its contacts, it holds itself, and when the energization signal to cancel the self-holding is received from the reset switch S2, the buzzer is activated. 25 energized circuit is made, and the buzzer 25 continues to sound.

The operation of the device of the present invention having the above configuration will be explained.

In both FIG. 1 and FIG. 2, the door of the safe can be freely opened and closed.

When locking the door of the safe, the lock connecting rod 17 is engaged with the safe body by operating the handle.

As a result, the swinging rod 12 of the fine movement switch S3 is
8 and rotates in a direction away from the contact shaft 16 against the tensile force of the spring 14 and hits the stopper 15 to maintain the open state of the fine movement switch S3.

Next, the lock 6 is operated to move the lock slider 7 forward.

As the lock slider 7 moves forward, it engages with a stopper (not shown) protruding from the cannula connecting rod 17, and even if the handle is operated, the cannula connecting rod 17 moves slightly;
Keeps the door locked.

As the lock slider 7 moves forward, the operating shaft 4 is pushed forward against the retreating force of the spring 5 and comes into contact with the conductive member 2.

That is, the main switch S1 is closed, and the current from the power source 19 passes through the connection 20, the main switch S1, and the connection 21 to the swinging rod 12 of the fine movement switch S3.

This will set the safe's alarm system, and it will be automatically set by locking the door.

When the handle is operated in an attempt to open the door without releasing the lock 6 with the alarm device set, the cannula connecting rod 17 moves slightly in the axial direction.

As a result, the engaging element 18, which had been pivoting upward by pushing the swinging rod 12 of the fine movement switch S3, is displaced upward, and the swinging rod 12
is rotated downward by the tension of the spring 14 and the contact shaft 16
come into contact with.

That is, the fine movement switch S3 is closed.

When the fine movement switch S3 is closed, the current flowing through the swinging rod 121 is introduced into the self-holding relay 22 through the contact shaft 16 and the connection 24, and closes the energizing circuit between the power source 19 and the buzzer 25. Maintain that state yourself.

Therefore, the buzzer 25 sounds loudly inside the safe and generates an alarm.

To stop the operation of this buzzer 25, press the main switch S1.
to open the energizing circuit of the self-holding relay 22, or
Or close the reset switch S2, but opening the main switch S1 requires matching the code number on the dial and the key to unlock the lock 6. In order to close the lock, the lock connecting rod 17 must be moved by the movement degeneracy of unlocking, and the lock 6
When locking, the movement of the lock connecting rod 17 to unlock is restrained by the lock slider 7, so the reset switch S2 is not closed, and any operation other than the original unlocking operation of the door of the safe is performed. In this case, once the self-holding relay 22 is activated, the electric circuit energized to the buzzer 25 cannot be cut off, and the buzzer 25, which generates an alarm at the initial stage of opening the safe door for the purpose of theft, continues to sound. To ensure that the purpose of crime prevention is achieved.

In addition, when opening the safe door normally, the main switch S1 is opened by unlocking the lock 6, so even if the lock connecting rod 17 is unlocked afterwards and the fine movement switch S3 is closed, the self-holding relay 22 is not energized. Buzzer 25 will never sound.

As described above, in a safe alarm device that detects the initial operation stage of an attempt to open the door illegally and activates a buzzer, according to the present invention, the main switch that is linked with the dial or lock, and the cannula connecting rod are linked. The fine movement switch and self-holding relay glue set switch are all arranged on one plate, and the operating mechanism is extremely simple, making it easy to assemble inside the safe. The number of parts of the interlocking mechanism is greatly reduced, and it operates reliably without failure, and costs are reduced, which has the advantage of being able to be provided at a low price.

[Brief explanation of the drawing]

FIG. 1 is a detailed view of the device of the present invention, and FIG. 2 is an electrical circuit diagram. SL...Main switch, S2...Reset switch, S3...Fine movement switch, To...
... Plate, 2... Conductive member, 3...
・Support, 4...Operating axis, 6...Lock, 7...Lock supida, 8, 12...
... Swinging rod, 16... Contact shaft, 17...
・・Cannuki connecting rod, 18・・・・Engager, 19・
...Power supply, 22...Self-holding relay 25
······buzzer.

Claims (1)

[Scope of utility model registration request] On one plate 1 made of an insulating material on which a square-shaped conductive member 2 is fixed, a support 3 formed of a conductive material and connected to a power source 19 is provided at a position opposite to one side of the conductive member 2.
is attached to the lock slider 7 of the dial or lock 6.
A main switch S1 is provided with an operating shaft 4 that contacts one side of the conductive member 2 in the locked state to supply electricity, a swinging rod 12 pivotably pivoted about a fulcrum 13, and the conductive member 2 are electrically connected. A fine movement switch S3 is connected to the connecting rod 17, engages with the engaging element 18 protruding from the connecting rod 17, and is brought into contact by slight movement of the connecting rod 17 in the lock release direction, and energizes the self-holding relay 22, and the fulcrum 9. The swinging rod 8 which is pivotally connected to be able to swing freely and the self-holding relay 22 are electrically connected, and the connecting rod 17 is pushed by the engaging element 18 at the moving end of the locking release to connect the conductive member. A switch S2 that contacts the other side of 2 to reset the self-holding relay 22 is disposed, and the self-holding relay 22 and the power source 19
An alarm device for a safe, characterized in that a buzzer 25 is connected to the alarm device.