JP2000251159A - Burglar arlam also used as chime - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which is mainly for a general household, inexpensive and easy to operate and used as both a chime and an alarm. SOLUTION: An opening/closing switch consisting of a pair of movable contacts and fixed contacts attached close to each other, e.g. at an entrance door and a support frame of the door is provided, a chime circuit and an alarm circuit are provided side by side in an alarm main body, and by operation of an operation changeover switch 12, the device is used in the same manner as a normal chime or it is set to the alarm to ring an alarm when an intruder opens the door illegally to make the intruder leave when a house is left empty.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a wing and its frame, for example, an entrance door and its mounting frame. When a family member is at home, the opening of the entrance door is transmitted as a chime, and the door is locked. The present invention relates to a security alarm that also uses a chime that warns of an illegal intruder from the opening of the door by, for example, a buzzer sound or a bell sound.

[0002]

2. Description of the Related Art Conventionally, chimes used for home use are mainly used to inform a home resident that there is a visitor. On the other hand, the locking device attached to the entrance door has no means for further removing an intruder when unlocked illegally. Also, for example, a security alarm known as a security system for offices and the like, when the system is unlocked after putting the system in a standby state, the alarm device automatically activates if the release operation is not performed within a predetermined time. Although the system is shifted, such a system generally does not have a chime mechanism, and therefore, it is necessary to separately install a chime when it is desired to add the chime. Further, the existing security system has a disadvantage that the maintenance cost of the equipment is high and it is too expensive for general household use.

[0003]

In view of the above, it has been desired to develop a security alarm that also serves as a chime, which can be equipped at low cost mainly for ordinary households.

[0004]

In order to solve the above-mentioned problems, the present invention comprises an open / close switch comprising a pair of movable contacts and fixed contacts attached to a wing and its frame in close proximity to each other. In the alarm body to which the open / close switch is connected, a chime circuit and an alarm circuit that are activated by the operation of the switch are provided together, and an operation changeover switch that switches between operation of the chime circuit and operation of the alarm circuit is provided with a reset contact, A timer circuit is provided between the changeover switch and the alarm circuit so as to provide a security alarm which also serves as a chime configured to activate the alarm after a predetermined time of operation of the open / close switch.

[0005] The alarm of the present invention configured as described above,
If the operation changeover switch is operated to switch to the chime circuit, it operates in the same manner as a normal chime. Further, by switching to the alarm circuit, it is possible to detect that the door has been opened illegally and to transmit an alarm, thereby making it possible for the intruder to escape. And since the structure is simple, it can be attached at a price which is not much different from that of a normal chime device, and there is an advantage that security of a general house or the like can be strengthened at low cost.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, S indicates a movable contact (magnet) 1 attached to the inner upper edge of the entrance door, for example, and the contact 1
, A fixed contact (reed switch) 2 attached to the frame side of the door in close proximity to
This is an alarm body to which the open / close switch S is connected.

As shown in FIG. 2, the alarm main body 3 comprises a back plate 4 attached to a wall or the like and a cover case 5, and a housing 7 for a battery 6 and an oscillator 8 of a piezoelectric element type.
The other end is provided with a power distribution board 9 and an LED 10, and an operation changeover switch 12 is provided at a lower end portion with a lever portion 11 protruding.

FIG. 3 is a configuration diagram of an electric circuit provided in the alarm main body 3. In the figure, 12 is the operation changeover switch, 13 is a door open / close detection unit provided with the open / close switch S, 14 is an alarm circuit, 15 is a chime circuit provided in conjunction with the alarm circuit 14, 16 is the operation changeover switch 12 and the alarm circuit. 14, a piezoelectric element driving circuit, 8 is a piezoelectric element type oscillator,
Is a drive circuit for the LED 10. The operation changeover switch 12 has three contacts: an alarm a, an off (reset) b, and a chime c.

The operation of this alarm will be described below with reference to this circuit diagram. If the family member is at home and the operation changeover switch 12 is set to chime c, the chime circuit 15 conducts when the door is opened, the oscillator 8 is activated, and the melody sounds once. After that, every time you open the door, the melody sounds once and stops.

When the operation changeover switch 12 is set to the alarm a, for example, when going out, the alarm state is switched to the alarm state after 10 seconds set in the timer circuit 16. When the door is opened from this set state, the LED drive circuit 18
After the LED 10 blinks for 10 seconds, the alarm circuit 14 conducts, the oscillator 8 operates and an alarm sounds. In this state, the operation of the oscillator 8 continues even if the door is closed and the open / close switch S returns, and the operation changeover switch 12
The alarm is continued until is turned off b.

A homecomer who has returned home can reset the alarm circuit 14 by turning off the changeover switch 12 within 10 seconds after opening the door. During this time L
The ED 10 is blinking, and after 10 seconds, an alarm is activated. As described above, the alarm device can selectively use the chime and the alarm by an appropriate operation.
The installation of the present apparatus is not limited to the entrance door, and it goes without saying that the apparatus is used for crime prevention by being attached to a general wing such as a window or a door and its frame.

[0012]

According to the present invention configured as described above,
An open / close switch including a pair of movable contacts and a fixed contact;
It is possible to introduce an alarm device for home use with a simple device constituted by the alarm main body, and as described above, it is possible to expect extremely excellent effects such as the security at home can be enhanced at low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of an alarm main body.

FIG. 3 is a schematic diagram of a circuit configuration.

[Explanation of symbols]

S Open / close switch 1 Movable contact 2 Fixed contact 3 Alarm body 4 Back plate 5 Cover case 6 Battery 7 Housing 8 Oscillator 9 Power distribution board 10 LED 11 Lever 12 Operation changeover switch (a: alarm b: off c: chime) 13 Door open / close Detector 14 Alarm circuit 15 Chime circuit 16 Timer circuit 17 Piezoelectric element drive circuit 18 LED drive circuit

Claims (1)

[Claims] An open / close switch comprising a pair of movable contacts and fixed contacts attached to a wing and a frame thereof in close proximity to each other, and is activated by an operation of the switch in an alarm body connected to the open / close switch. Along with a chime circuit and an alarm circuit, a reset contact is provided, an operation changeover switch for switching between operation of the chime circuit and operation of the alarm circuit is provided, and a timer circuit is provided between the changeover switch and the alarm circuit. A security alarm that also functions as a chime that is configured to activate an alarm after a predetermined time has elapsed from the operation of the open / close switch.