JPS5831971Y2 - 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 security device that immediately alerts you 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.

Although all of these have successfully achieved their respective objectives, they have had the problem of complex structures, difficulty in assembling them into a safe, and high costs.

The present invention is characterized in that it has a simple structure, operates reliably, and is improved in that it detects the door opening operation at the initial stage when the door is about to be opened, and generates 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
is a reset switch for the self-holding relay, and S3 is a micro-motion switch that detects slight vibrations of the safe.

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

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.

Further, the rear end of the operating shaft 4 is in contact with the tip of a lock slider 7 provided on a dial or a 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 14 of the door orthogonal thereto via a stopper, and restricts the releasing movement of the cantilever connecting rod 14 when the cantilever connecting rod 14 is in the locked state.

The support 3 that supports the operating shaft 4 is connected to a power source 16 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 so that when the cannula connecting rod 14 moves to the open end, the rear end of the rocking rod 8 is moved against the tension of the spring 10 by an engager 15 protruding from the cannula connecting rod 14. 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 relay holding state of the self-holding relay 18, which will be described later.

Therefore, in order to provide the signal, the swinging rod 8 and the self-holding relay 18 are connected by a wire 19.

The fine movement switch S3 has a structure shown in FIGS. 3 and 4.

This micro-motion switch S3 is a vibration switch that senses when an attempt is made to open the door of the safe other than the normal one or to move it to another location.

Reference numeral 12 is a contact ring forming the electrical contact, and reference numeral 13 is a vibrating weight that vibrates into contact with the contact ring 12.

The contact ring 12 is provided with vibration absorbing springs 22 that are tensioned in the radial direction at several points around the circumference, in a hole 21 formed in the support base 20.
It is supported in even tension.

The vibrating weight 13 in the housing is supported by a resonant spring 25 fixed to the vibrating table 23 which fixes the support table 20 via an insulating material 24, and has a slight gap in the contact ring 12.・It is included.

Then, the support stand 20 and the conductive member 2 of the main switch S1
A wire connection 26 is made between the vibrating table 23 and the self-holding relay 18 .

The self-holding relay 18 is connected to the power supply 16 and the buzzer 28, and once the self-holding relay 18 is energized and closes its contacts, it holds itself, and when an 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.

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

When closing the safe door, first tighten the cannula connecting rod 14.
engages with the safe body by operating the handle.

Next, the lock 6 is locked with a key to lock the movement of the cannula connecting rod 14 in the axial direction.

When the lock 6 is locked, the lock slider 7 moves forward and engages with a stopper (not shown) protruding from the cantilever connecting rod 14, thereby restraining the movement of the cantilever connecting rod 14, and the door is completely locked.

As the lock slider 7 moves forward, the actuating 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 of the power source 16 passes through the connection 17, the main switch S1, and the connection 26 to the contact ring 12 of the vibration switch S3.

The safe's alarm system is now set, and it is automatically set by locking the door.

If such an alarm device is set and the safe door is opened without unlocking the lock, or if the safe door is attempted to be taken to another location, the door or body of the safe may be damaged. When a slight movement occurs, the vibration switch S3
is detected, and the buzzer 28 sounds to issue an alarm.

That is, when the safe is balanced, the vibration switch S3
The vibrating weight 13 resonates and oscillates.

As a result, the vibrating weight 13 collides with the contact ring 12, passes current to the self-holding relay 18, creates an electric path to the buzzer 28, and operates the buzzer 28.

The fact that the contact ring 12 is supported by the vibration absorbing spring 22 means that the self-holding relay 18 has a traditional time of 3/10 seconds to close the contact and hold it self-holding.

Therefore, when the vibrating weight 13 collides with the contact ring 12 due to resonance, the self-holding relay 18 cannot be maintained if it is rebounded by the balance and the contact is immediately separated.

In order to prevent this and reliably keep the self-holding relay 18, the vibration when the vibrating weight 13 collides with the contact ring 12 is absorbed and attenuated by the vibration absorbing spring 22, and the vibration weight 13 and the contact ring 12 are A damper action is provided so that the contact time force-strain self-holding relay 18 is sufficiently maintained.

The buzzer 28, which is activated once the self-holding relay 18 is kept, resets the reset switch S2 to the connecting rod 1.
It will continue to ring unless you unlock it.

In the past, when you operated the dial or lock 6 to open the safe door, the main switch S1 opened, so the vibration switch S3 was opened.
Since the electrical circuit to the buzzer 2 is cut off, even if vibration occurs, the buzzer 2
8 does not work.

As described above, the device of the present invention has a simple structure and reliable operation, so it has a good security effect and also sounds a buzzer when it detects the initial stage of an attempt to open the door illegally. Therefore, an abnormality is alerted at an early stage, the alert is continued even if the safe is moved to another location, and the theft and movement location of the safe is notified.

In particular, the vibration switch that detects abnormalities has the structure of a vibrating weight and a contact ring that acts as a damper, so it has the advantage of reliably keeping the self-holding relay even with slight vibrations and issuing an alarm with a buzzer. be.

[Brief explanation of drawings]

Fig. 1 is a detailed diagram of the device of the present invention, Fig. 2 is an electric circuit diagram, Fig. 3 is a plan view of the vibration switch, and Fig. 4 is Fig. 3 IV-I.
It is a sectional view taken along the V line. SL...Main switch, S2...Reset switch, S3...Vibration switch, 1...
... Plate, 2... Conductive member, 3...
...Support, 4...Operating axis, 6...
Lock, 7...Lock slider, 12...
・Contact ring, 13... Vibrating weight, 14...
・Call connecting rod, 15... Engagement element, 16...
...Power supply, 18...Self-holding relay, 20
. . . Support stand, 22 . . . Vibration absorption spring, 23 . . . Vibration table, 24 . . . Insulating material, 25 . . . Vibration spring.

Claims (1)

[Scope of utility model registration request] An alarm device installed in a safe, which includes a main switch connected to a power source when a dial or lock is locked, and a contact ring supported by a vibration absorbing spring on a support base, and the support base is fixed via an insulating material. A resonant spring is fixed on a vibrating table, and a vibrating weight supported by the resonating spring is inserted into the contact ring with a slight gap, so that the vibrating weight comes into contact with the contact ring due to slight vibrations of the safe. a fine movement switch that energizes the self-holding relay with current from the main switch, a switch that resets the self-holding relay at the unlocking moving end of the lock connecting rod of the safe door, and a switch that is connected to the self-holding relay and a power source. Safe alarm system with alarm.