JPS5919485Y2 - wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a wireless communication device having a slave device powered by a battery.

When using a battery as the power source for a slave unit, especially if the slave unit is small and there is not enough battery capacity, it is necessary to make the slave unit's circuit an energy-saving type and to shorten the power-on period as much as possible. .

For this reason, the child device is always in an off state, turns on by a calling operation, and automatically turns off after a certain period of time (hereinafter referred to as t) to prevent it from continuing to be in an on state. things are being done.

However, in such a conventional example, when a call that is shorter than time t is completed, power consumption for the remaining time is wasted, and even during a call, the call is cut off after time t, which is inconvenient and inconvenient to use. There was a problem.

The present invention was developed with the aim of solving these problems, and the power of the slave device is turned off by a shortening signal from the intimate, and is kept on for a certain period of time by an extension signal from the intimate. By providing a power control circuit in the slave device, the power source of the slave device can be turned off or kept on from the intimate side, thereby providing a wireless communication device that can use battery power without wasting battery power. .

Hereinafter, an embodiment in which the present invention is applied to a wireless door intercom will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing the outline of this embodiment, in which numeral 1 is a slave device for outdoor installation with a built-in battery power supply, and numeral 2 is an antenna.

3 is a space for indoor installation that operates on AC power, 4 is an antenna, and 5 is a wall of a building.

Since it is a wireless system as described above, there is no need for wiring work during installation, making the work easier. Furthermore, in order to extend the life of the power battery of the slave device 1, it is configured as follows.

FIG. 2 is a block diagram of the slave device 1. When the call button 11 is turned on, the one-shot circuit 12 is activated and the slave device 1 is powered on for a period of time t, making it possible to transmit and receive.

a calling signal Sc from the calling signal generation circuit 13;
The carrier wave f generated by the oscillator 16 is generated by the speech signal A2 inputted from the microphone 14 and amplified by the amplifier 15.
C2 is modulated by a modulator 17, amplified by a power amplifier 18, and transmitted from an antenna 19 to the host 3.

The carrier wave Fc1 modulated by the call signal A1 from the intimate 3, the shortened signal S1, and the extended signal S2 is received by the antenna 21, passes through the front end 22, filter 23, and IF amplifier 24, and is demodulated by the demodulator 25, and is then demodulated by the AF amplifier 26. The speech signal A1 is amplified by the power amplifier 27 and sent out from the speaker 28.

Further, the shortening signal S1 and the lengthening signal S2 are detected by signal detectors 29 and 30, respectively, and sent to the shortening circuit 31 and the lengthening circuit 32 to control the one-shot circuit 12.

The power supply operation circuit 33 turns on and off the battery 34, and turns on the battery 34 only during the period when the one-shot circuit 12 is outputting an oscillation pulse.

Details of this operation will be described later. Furthermore, antenna 19
．． 21 can be used in common, and corresponds to the antenna 2 in FIG.

FIG. 3 is a block diagram of the Shinyaku 3.

The carrier wave fC2 from the child unit 1 is received by the antenna 41,
front end 42, filter 43, IF amplifier 44,
A calling signal Sc or a speech signal A2 is sent out from a speaker 48 via a demodulator 45, an AF amplifier 46, and a power amplifier 47.

On the other hand, a telephone call signal A1 enters from a microphone 51, is amplified by an amplifier 52, and is oscillated by an oscillator 53 to generate a carrier wave fc.
1 is modulated by a modulator 54, amplified by a power amplifier 55, and transmitted from an antenna 56.

Similarly, when the shortening button 57 or the extending button 58 is turned on, the shortening signal generation circuit 59 or the extension signal generating circuit 60 generates a signal S1 or S2, which is transmitted to the slave device on the carrier wave fc1 in the same way as the call signal A1.

This intimate 3 is designed to operate with a 100mm AC power supply 61, and if the main switch 62 is turned on, the circuit is always on in preparation for a call from the slave unit 1. Power can also be obtained from sources other than the 100 V commercial power source.

Note that the antennas 41 and 56 can be used in common, and correspond to the antenna 4 in FIG.

FIG. 4 shows an example of a concrete circuit of the main part of the power supply section of the slave device 1, and the main part of the power supply operation circuit 33 is a transistor T.
r1. It is an on-off type flip-flop circuit consisting of transistor Tr2, and when the output Q of transistor Tr1 is at L level, the battery 34 is turned off and the power consumption becomes zero.

The comparator CO of the one-shot circuit 12 has an input terminal connected to the midpoint of the series circuit of the resistor R and the capacitor C and the call button 1.
1 is connected.

Now, when the call button 11 is turned on, the one-shot circuit 12 outputs an output for a period of time t determined by the resistor R and the capacitor C, and operates the flip-flop circuit of the power supply operation circuit 33 to set the output Q to the H level. Therefore, the battery 34 is turned on and each circuit is in an operating state.

Reference numeral 20 indicates a load that includes each circuit. Next, when the extension signal S2 is input from the intimacy 3, the extension circuit 32 operates and the transistor Tr3 is turned on, producing the same effect as turning on the call button 11 again, so the battery 340 on period is extended again by the time t. be done.

Further, when the shortening signal S1 is input, the transistors Tr4. Tr5 turns on and one-shot circuit 12
Since the output of is forcibly turned off, the battery 34 is turned off even in the middle of time t.

FIG. 5 is a time chart showing these operations, and a
When the call button 11 is turned on, the battery 3 of the slave device 1 is turned on.
4 indicates a normal state in which the switch is turned on for a time t.

Part b is the case where the shortening signal S1 is issued at time t1, and the battery 34 is turned off at time t1 to prevent power from being wasted for the remainder of time t even though the call has ended. It shows.

Part C is the case where the extension signal S2 is issued at time t2 because the call is prolonged, and the extension signal S2 is issued at time t3, which is a time later than time t2.
This prevents the call from being interrupted in the middle of the call.

Furthermore, after issuing the extension signal S2, the shortening signal S is issued within a certain time.
Of course, if you roll a 1, you can turn it off.

As mentioned above, the present invention is equipped with a power control circuit in the slave device that turns off the power of the slave device by a shortening signal from the intimate and keeps it on for a certain period of time by an extension signal from the intimate. This eliminates the inconvenience of having the power remain on even though it ends early, wasting battery power, or of having a long call cut off after a certain amount of time. This has the advantage that it is possible to extend the battery life and improve usability of wireless communication devices that use small-capacity batteries as power sources for slave units, such as door phones.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram, Fig. 2 is a block diagram of the sub-device, Fig. 3 is a block diagram of the sub-device, and Fig. 4 is a main part of the sub-device. The specific circuit diagram, FIG. 5, is a time chart showing the operating state. 1 is a slave device, 3 is an intimate device, 11 is a call button, 33 is a power supply operation circuit, 34 is a battery, 57 is a shortening button, 58 is an extension button, 6
1 is an AC power supply.

Claims (1)

[Scope of utility model registration request] In a wireless communication device that consists of a slave unit that operates on battery power and a slave unit that operates on commercial power, etc., the power of the slave unit is turned on for a certain period of time by a call operation from the slave unit. A wireless communication device in which a slave device is equipped with a power control circuit that turns off when a shortened signal is received from the user, and remains on for a certain period of time when an extended signal from a loved one is received.