JPS59185442A - Mobile radio telephone set - Google Patents

Abstract

PURPOSE:To confirm where a radio telephone set is by actuating an ultrasonic wave transmitter at an optional place and allowing an annunciator incorporated in the radio telephone set to sound. CONSTITUTION:When the position of the radio telephone set 3 is not clear, the switch 10 of the ultrasonic wave transmitter 2 is turned on at an optional position to actuate an ultrasonic wave oscillation circuit 11, sending an ultrasonic wave signal. The telephone set 3 receives the ultrasonic wave signal and an ultrasonic wave detecting circuit 15 detects and inputs it to a control circuit 16. The circuit 16 inputs a signal of a normal telephone connection state from a control circuit 20 to discriminate the telephone connection state and outputs a detection signal to a buzzer 17 except in the normal connection state to let the buzzer 17 sounds. Then, the position of the telephone set 3 is confirmed by the buzzing sound to annunciate the necessity to move the telephone set 3 into a connectable area.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile radiotelephone device, and more particularly to a mobile radiotelephone device that allows the location of a radiotelephone to be confirmed.

Unlike ordinary telephones, mobile radio telephones used in limited areas such as homes or offices are used in a state where the subscriber line of an exchange and the radio telephone are wirelessly connected. Calls can be made from any location within the coverage area, and the radiotelephone may be moved to any location. Normally, a radiotelephone is used within a connection area, but since it is wirelessly connected to the subscriber line of an exchange, the connection area is not visible to the subscriber, so sometimes the location of the radiotelephone is There may be times when the connection area is out of reach of the telephone. Furthermore, even within the connection area, the radio waves may be blocked by buildings or the like, making it impossible to use the wireless telephone.

This type of mobile radio telephone equipment has a ringer function that causes the radio telephone to ring when an incoming call signal is received from the exchange, and an interphone function that calls the radio telephone from the wireless connection device. If,
Although it is possible to fully confirm the location of a wireless telephone by using these functions, if the location of the wireless telephone becomes unknown outside the connection area where radio waves do not reach,
It was not possible to confirm the location of a wireless telephone using those functions.

The present invention solves the above-mentioned problems by activating an ultrasonic transmitter at any location and making an alarm built in the radio telephone ring, thereby making it possible to reveal the location of the radio telephone. It is characterized by: An embodiment of the present invention will be described below with reference to the drawings.

As shown in the figure, the mobile radio telephone device according to the present invention includes a wireless connection device 1 connected to a subscriber line of an exchange, a wireless telephone 3 wirelessly connected to the wireless connection device 1, and an ultrasonic transmitter 2. It consists of

The wireless connection device 1 includes a control circuit 12 that controls normal telephone connections, a transmission/reception circuit 13 that wirelessly connects the wireless telephone 3 and the subscriber line of the exchange under the control of the circuit 12.
It has an antenna 14. The ultrasonic transmitter 2 also includes a switch 1o and an ultrasonic oscillation circuit 11 that is activated by operating the switch 10 to generate ultrasonic waves. The wireless telephone 3 includes a handset 21, a control circuit 20 that controls normal telephone connection, a transmitting/receiving circuit 19 that wirelessly connects the wireless connection device 1 and the wireless telephone 3 under the control of the control circuit 20, and an antenna 18. Contains an ultrasonic receiving section 4.

Furthermore, the ultrasonic receiving section 4 identifies the ultrasonic detection circuit 15 that detects the ultrasonic signal transmitted from the ultrasonic transmitting device 2 and the normal telephone connection state, and detects the ultrasonic signal when it is not in the normal telephone connection state. Control circuit 16 that outputs a sound wave detection signal
and a buzzer 17 that sounds in response to the output ultrasonic detection signal. In the embodiment, the buzzer 17 is used as the alarm, but an alarm other than the buzzer may be used.

Next, the operation will be explained. If the location of the wireless telephone 3 becomes unknown, operate the switch 10 of the ultrasonic transmitter 2 at any location to turn it on, and activate the ultrasonic oscillation circuit 11'f to send an ultrasonic signal. Send. On the other hand, when the wireless telephone 6 side receives the transmitted ultrasonic signal, the received ultrasonic signal is detected by the ultrasonic detection circuit 15, and the detection signal is input to the control circuit 16. When the ultrasonic transmitter 2 is activated within the connection area,
In order not to disturb the normal telephone connection, the control circuit 16 inputs a signal indicating the normal telephone connection state from the control circuit 20 to identify the telephone connection state. When an ultrasonic detection signal is input in a state other than the state, the detection signal is outputted to the buzzer 17 to make it ring. This ringing sound allows the user to recognize the location of the wireless telephone 3 and informs the user that it is necessary to move the wireless telephone within the connectable area.

As explained above, the present invention provides the following advantages:
An ultrasonic signal is transmitted, and the wireless telephone receives the signal and activates an alarm when the telephone is not in a normal telephone connection state, so the location of the wireless telephone can be confirmed based on the operating status of the alarm. There is an effect that can be done.

[Brief explanation of drawings]

The figure is a block diagram showing an embodiment of the present invention. 1...Wireless connection device 2...Ultrasonic transmitter 3.
...Wireless electric packer 10...Switch 11...Ultrasonic oscillation circuit 12...Control circuit 13...Transmission/reception circuit 15...Ultrasonic detection circuit 16...Control circuit 17...Buzzer Alarm device 19... Transmission/reception circuit 2
0... Control circuit 21... Handset

Claims (1)

[Claims] (1) a wireless connection device connected to a subscriber line of an exchange; a wireless telephone wirelessly connected to the wireless connection device;
The ultrasonic device includes a switch and an ultrasonic transmitting circuit that is activated by operating the switch, and the wireless telephone includes a transmitting circuit for normal telephone connection, and an ultrasonic transmitting circuit that is activated by operating the switch. a control circuit for controlling the connection of two telephones by the transmitting/receiving circuit;
a handset, an ultrasonic detection circuit that detects the ultrasonic signal transmitted from the ultrasonic transmitter, and a control circuit that outputs the ultrasonic detection signal in a state other than a normal telephone connection state;
A mobile radiotelephone device, comprising: an alarm activated by an outputted ultrasonic detection signal.