JPS61258538A - Radio telephone set - Google Patents

Abstract

PURPOSE:To eliminate the need for switch operation at a slave set from the incoming to rising of power supply by raising a power of a transmission/ reception circuit of the slave set automatically from the incoming from a telephone line to a radio telephone set. CONSTITUTION:When the slave set is installed to a master set, a charging circuit 6 of the master set charges a battery 9 of the slave set. When an incoming call exists from the telephone line, an incoming signal detected by a bell signal detecting circuit 5 is sent to a microcomputer 4. The microcomputer 4 activates a bell 8 and interrupts the charging current of the charging circuit 6 in a prescribed pattern. On the other hand, a charging current detection circuit 14 of the slave set side detects the intermitting state of the charging current and sends the result to the microcomputer 4. The microcomputer 4 reads a prescribed pattern from the signal of the charging current detection circuit 14, recognizes the incoming state to conduct a switch circuit 10 thereby supplying the power to the transmission/reception circuit of the slave set.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a radio telephone comprising a base unit with a built-in storage battery and a portable slave unit.

2. Description of the Related Art Conventionally, there has been a radio telephone of this type as shown in FIG. 2.0 FIG. 3 is a transmitting/receiving circuit, and 3 is an antenna. The audio signal from the telephone line connection terminal 1 is converted into a radio frequency signal by the transmitting/receiving circuit 2 and transmitted to the handset via the antenna 3. ! The radio frequency signal from the handset is sent to the telephone line through the reverse route 3. 4 controls the transmitting/receiving circuit 2 and the bell 8 by a microcomputer. The 5-bell signal detection circuit detects a bell ringing signal among the signals sent from the connection terminal 1 to the telephone line and sends a detection signal to the microcombi 4. Reference numeral 6 denotes a charging circuit, and 7 indicates a charging terminal, which charges the storage battery of the slave unit from the charging circuit 6 via the charging terminal 7 when the slave unit is installed in the base unit.

FIG. 2 is a diagram showing the configuration of the handset. 2, 3, 4 in Figure 2. and 7 are the same as the same numbers in FIG. 2a, so their explanation will be omitted. 9 is a storage battery that supplies power to each circuit of the slave unit. Reference numeral 10 denotes a switch circuit, and when the key switch 11 is operated, the switch circuit 10 becomes conductive via the microcomputer 4, and power from the storage battery 9 is supplied to each circuit in the slave unit. 12 is a speaker, and the radio frequency signal sent from the base unit is transmitted to the antenna 3. The signal passes through the transmitter/receiver circuit 2 and is converted into an audible signal by the speaker 3. 13 is a microphone that converts the audio signal into an electrical signal, and transmits/receives the circuit 2. A radio frequency signal is sent to the base unit via the antenna 3.

Conventional wireless telephones were configured as described above.

Problems to be Solved by the Invention By the way, in the above-mentioned conventional wireless telephone, if a call is received from the telephone line while the slave unit is installed in the base unit and charging is in progress, After hearing the bell sound of the five swords, it was necessary to take the slave unit away from the base unit and operate the key switch 11 of the slave unit to turn on the power to the slave unit. ifv
If the radio wave channel used is multi-channel, it takes time to link the channels between the base unit and the slave unit, so there is a disadvantage that it takes even more time to communicate after hearing the bell sound. Ta.

Means for Solving the Problems The technical means for solving the problems described above is to provide a first control means that causes an incoming call signal to be sent from the first charging terminal when the base unit receives an incoming call from the telephone line. On the other hand, the slave device includes an incoming signal detection means 5 for detecting the incoming signal inputted through the second charging terminal.

and a second control means for controlling the power to be supplied from the storage battery to the transmitting/receiving circuit of the handset based on the output from the incoming signal detecting means.

Operation With the above configuration, the wireless telephone of the present invention can receive a call from the telephone line while the handset is installed on the base unit.
The transmitter/receiver circuit of the handset is automatically enabled for communication, improving operability.

EXAMPLE An example of the present invention shown in FIG. 1 will be described below. FIG. 1a shows the main unit, and 1-8 are the same as FIG. 2, but the charging circuit 6 is controlled by the microcomputer 4 to cut off the charging current. FIG. 1 is a diagram showing a handset, and numbers 2 to 4 and 7 degrees and 9 to 13 are the same as in FIG. 2.

14 is inserted between the charging terminal 7 and the storage battery 9, detects the intermittent state of charging current, and sends the detection signal to the microcomputer 4.
This is a charging current detection circuit that sends the charging current to the Next, I will explain the operation.

When the child device is installed in the parent device, charging is performed from the charging circuit 6 of the parent device to the storage battery 9 of the child device. When there is an incoming call from the telephone line, the incoming call signal detected by the bell signal detection circuit 6 is sent to the microcomputer 4. The microcomputer 4 operates the bell 8 and at the same time makes the charging current of the charging circuit 6 intermittent in a predetermined pattern. On the other hand, the charging current detection circuit 14 on the slave device side detects the above-mentioned on/off state of the charging current and sends it to the microcomputer 4.

The microcomputer 4 reads a predetermined pattern from the signal of the charging current detection circuit 14, recognizes that an incoming call is received, turns on the switch circuit 10, and supplies power to the transmitting/receiving circuit of the handset. In fact, if you use a multi-channel access system with multiple channels between the base unit and slave unit, you can ring the bell after establishing a communication channel in advance.

Therefore, the time it takes for a caller to be able to talk after hearing the bell and picking up the handset can be significantly shortened.

Effects of the Invention As described above, the wireless telephone of the present invention can automatically turn on the power of the transmitting/receiving circuit of the handset in response to an incoming call from the telephone line. No need to operate the switch on the handset with “-ge”.
1. Even when a multi-channel access method is adopted, it has the advantage of reducing the amount of time it takes to have a conversation, and improving operability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a wireless telephone according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional wireless telephone. 1...Telephone line connection terminal, 2...Transmitting/receiving circuit, 3...Antenna, 4...Microcomputer, 6...Bell signal detection circuit, 6-... Charging circuit, 7... Charging terminal, 8... Bell,
9...Storage battery, 10...Switch circuit, 1
1...Key switch, 12...Speaker, 1
3...Microphone, 14...Charging current detection circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure (α) (b)

Claims (2)

[Claims] (1) Consisting of a base unit connected to a telephone line and a portable slave unit powered by a storage battery, by installing the slave unit in the base unit, the first charging provided in the base unit In a wireless telephone, the storage battery in the slave unit is charged by a charging circuit provided in the base unit by bringing a terminal into contact with a second charging terminal provided in the slave unit, wherein the base unit is connected to the telephone line from the telephone line. A first control means is provided for transmitting an incoming call signal from the first charging terminal when an incoming call is received, and the slave device detects the incoming call signal inputted through the second charging terminal. A radio telephone comprising a signal detection means and a second control means for controlling the storage battery to supply power to the transmitting/receiving circuit of the handset based on the output from the incoming signal detecting means. (2) A first control means is provided that controls the charging circuit to intermittent the charging current for a predetermined period and sends an incoming call signal to the first charging terminal when the base unit receives an incoming call from the telephone line;
A charging current detection means is provided between the second charging terminal of the slave unit and the storage battery, and a second control unit controls the supply of power from the storage battery to the transmitting/receiving circuit of the slave unit based on the output from the charging current detection means. A radio telephone according to claim 1, further comprising a control means.