JPH03220927A - Radio telephone system - Google Patents

Abstract

PURPOSE:To eliminate the need for the installation of a mobile set to a location able to be connected to a commercial AC power supply by mounting removably plural chargeable batteries to the mobile set and selecting other battery when the capacity of the battery in use is lost. CONSTITUTION:Suppose that a voltage Vcc through a contact (solid lines) of a battery changeover section 11 is fed to each section of a mobile set 3 via a connector 12 from a battery 4a. When the capacity of the battery 4a is lost (capacity at which the mobile set 3 is not completely in operation), since the voltage Vcc is a prescribed value or below, a low voltage detection section 35 detects the reduction to send a switch display switching signal to a control circuit 34. Then the control circuit 34 displays the decrease in the voltage of the battery 4a to control the battery changeover section 11 and to throw the contact from the position shown in solid lines into dotted lines side and the changeover of the battery 4a into the battery 4b is displayed. Thus, it is not required to install the mobile set 3 to the commercial AC power supply.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a radio telephone device, and more particularly to a power source for a mobile unit in a radio telephone device.

(Prior Art) A conventional power supply method for a wireless telephone device will be described with reference to FIG.

In FIG. 5, the wireless telephone device includes a parent device 2 connected to a wired telephone line 1 and a mobile device 3 connected via a wireless line. After controlling calls to and from 3, a vacant channel among the plurality of communication channels is used to make a call.

In this wireless telephone device, since the mobile device 3 can make a call at a location remote from the parent device 2, a rechargeable storage battery 14 is used as a power source for its operation.

In order to charge the storage battery 14, there have conventionally been three methods as shown in FIG.

First, by attaching the mobile device 3 to the main device 2 as shown by arrow A, the commercial AC power supply 8 connected to the main device 2 and the power adapter 7 that converts the AC voltage of this commercial AC power supply 8 into DC voltage are connected. A method of charging the storage battery 14 of the mobile device 3 with the output voltage. The second method is to charge the storage battery 14 of the mobile device 3 with the output voltage of the power adapter 7 via the commercial AC power source 8 and the power adapter 7 connected to the mobile device 3 as shown by arrow A. Thirdly, by connecting the mobile device 3 to the mobile device charger 10 connected via the commercial AC power source 8 and the power adapter 7 as shown by the arrows, the output voltage of the power adapter 7 is transferred to the mobile device 3.
This is a method of charging the storage battery 14.

When charging the storage battery 14, the mobile device 3 must be installed at a charging location. For this reason, the mobile device 3 must be installed at a specific location where it can always be connected to the commercial AC power source 8, which is complicated.

In addition, in other aspects, when charging the storage battery 14 of the mobile device 3, the cord connected to the commercial mobile terminal T7.8 is visible, which creates a situation where the image of the wireless telephone device is lacking in wirelessness, resulting in a negative image. could have invited

(Problems to be Solved by the Invention) As mentioned above, in the conventional wireless telephone device, when charging the storage battery of a mobile device, there is a problem that it is limited to a place where it can be connected to a commercial AC power source, and a problem that it is difficult to connect to a commercial AC power source. There was a problem that the image deteriorated depending on the connected cord.

Therefore, an object of the present invention is to provide a wireless telephone device that eliminates these problems.

[Structure of the Invention] (Means for Solving the Problem) The mobile device includes a parent device connected to a wired line and a mobile device connected to the parent device via a wireless line, and a rechargeable storage battery is connected to the mobile device. In a wireless telephone device that is used as a power source for a mobile device, a plurality of rechargeable storage batteries are detachably attached to the mobile device, and when the storage battery being used as a power source for the mobile device runs out of capacity, the storage battery is used as a power source for the mobile device. The present invention is characterized in that the mobile device is switched to another installed storage battery and a display means provided on the mobile device displays this effect.

(Function) In the radio telephone device of the present invention, a plurality of rechargeable storage batteries are detachably attached to the mobile unit of the radio telephone device,
When the storage battery being used as a power source for the mobile device runs out of capacity, this storage battery is switched to another storage battery installed in the mobile device, and this fact is displayed by a display means provided on the mobile device. Therefore, by looking at this display means, the user knows that the storage battery in use has run out of capacity and has been switched to another storage battery.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of the wireless telephone device of the present invention.

Note that in FIG. 1, parts having the same functions as those shown in FIG. 5 are given the same numbers.

In FIG. 1, a parent device 2 is connected to a mobile device 3 via a wireless line, and is also connected to a wired telephone line 1. A brief explanation of this operation is as follows.

A signal sent from the wired telephone line 1 is transmitted through a line switch 100 that controls the DC loop, and further through a hybrid circuit 15 to become a modulating power for a transmitter 16. The radio waves modulated by the transmitter 15 are sent from the transmitting antenna 17 to the mobile device 3.
will be sent to. The demodulated signal is sent to the hybrid circuit 15
is sent to the wired telephone line 1 via the telephone line 1. synthesizer 2
0 outputs a frequency corresponding to the wireless channel to the transmitter 16 and receiver 19.

One of the outputs of the receiver 19 is input to a received electric field detection circuit 21 to determine the electric field strength. This circuit is generally called a carrier squelch circuit or a noise squelch circuit. The other output is outputted as a data signal included in the received demodulated wave, and is manually input and verified by an identification signal detection circuit 22 that matches an identification signal determined by the combination of the parent device 2 and the mobile device 3. This identification signal is generally called an ID code.

The outputs of these detection circuits and the demodulated output of the data signal are input to the control circuit 23 and used for connection control. Further, the control circuit 23 performs radio channel control by controlling the synthesizer 20, and performs control such as sending a transmission data signal to the transmitter 16 as a modulated manual power. A 16Hz detection circuit 24 that detects a calling signal from the wired telephone line 1 sends its output to a control circuit 23.

On the other hand, the mobile device 3 also has a receiving antenna 25 and a receiver 2.
6, and the demodulated output is output to the receiver 27. Also,
The voice input from the transmitter 28 is modulated by the transmitter 29, and is transmitted as radio waves from the transmitting antenna 30.

The synthesizer 31, the received electric field detection circuit 32, and the identification signal detection circuit 33 are equivalent to the parent device 2, and the control circuit 34 controls the mobile device 3. The speaker 35 is a sounder that emits a ringing tone when a call arrives.

As described above, the parent device 2 and the mobile device 3 connected to the wired telephone line 1 perform call control between the parent device 2 and the mobile device 3 via a control channel via a wireless line, and then perform multiple calls. The system detects an empty channel among the available call channels and makes a call.

By the way, the parent device 2 includes a commercial AC power supply 8 and a power adapter 7 that converts the AC voltage of the commercial AC power supply 8 into DC voltage.
is connected. The mobile device 3 includes a rechargeable storage battery 4a.
, 4b, a storage battery switching section 11, a display section 5, a low voltage detection section 35, and a display section 13 are provided. Further, the control circuit 34 performs operations based on the flowchart shown in FIG.

Now, assume that in the mobile device 3, a voltage Vcc is supplied to each part of the mobile device 3 from the storage battery 4a via the connector 12 and through the contact (solid line side) of the storage battery switching unit 11. When the capacity of the storage battery 4a runs out (a capacity value that does not allow the mobile device 3 to operate completely), the voltage Vcc becomes below a certain value, so the low voltage detection section 35 detects this decrease (step 36). , switch, and sends a display switching signal to the control circuit 34. As a result, the control circuit 34
In addition to displaying that the voltage of the storage battery 4a has decreased, the storage battery switching unit 11 is controlled to switch its contact from the solid line side to the dotted line side. At this time, the control circuit 34 displays that the storage battery switching unit 11 has made the switch and has switched the storage battery from 4a to 4b (steps 37 and 38). Next, the low voltage detection unit 35 detects the voltage of the switched storage battery 4b, and if the voltage is normal, it is 1, and the normal voltage Vcc will continue to be supplied to the mobile device 3 (step 3
9). Further, if the voltage has decreased in step 39, this fact is displayed on the display section 13.

Next, as another embodiment, there is one in which the mobile unit 3 of the radio telephone apparatus shown in FIG. 1 is configured as shown in FIG. 3. The mobile device 15 shown in FIG. 3 includes a rechargeable storage battery 4a,
Connectors 12a and 12b that connect and hold 4b, storage battery switching section 11, display section 5, low voltage detection section 6 a % 6
A bs display section 13 is provided. Also, the control unit 10
performs operations based on the flowchart in FIG.

The operation of the mobile device 15 shown in FIG. 3 will be explained below.

First, when the user attaches the storage battery to the connector, the low voltage detection units 6a and 6b detect the voltage of the storage battery, thereby confirming whether the storage battery is attached (step 4).
1). If it is confirmed that the storage battery 7t4b is attached to the connector 12b, the control circuit 34 then checks whether the contact of the storage battery switching unit 11 is on the dotted line side (step 42), and if it is on the solid line side, Switch and display switching signal (step 47) to switch to the dotted line side, that is, the power storage 1
64b becomes the voltage Vcc, and this fact is displayed on the display section 5 (step 48).

Next, the low voltage detection section 6b detects whether the voltage of the storage battery 4b is below a predetermined voltage (step 43), and if it is below the predetermined voltage, displays this on the display section 13, and then displays the step 43).
The process proceeds to step 4, where the voltage of the storage battery 4a is detected by the low voltage detection section 6a. If the voltage is below the predetermined voltage in step 44, this fact is displayed on the display section 13, and the process ends.

If the voltage is higher than the predetermined voltage in step 44, a switch and display switching signal is sent out (step 45), storage battery switching unit 1
1 to switch the contact from the dotted line to the solid line (step 46). Thereafter, the low voltage of the storage battery 4a is detected in the same manner (step 50), and if the voltage is below a predetermined voltage, the voltage is switched to the storage battery 41, and this fact is displayed (steps 51, 52, 53). Then, the process returns to step 43 again, and the above-mentioned process is performed. Note that if the installed storage battery is 4a in step 41, the switch and display are confirmed in step 4, and the contact point of the storage battery switching unit 11 is switched to the solid line side, and a message to that effect is displayed on the display unit 5 ( Steps 54.55). Then, proceed to step 50, and from step 51, 52, 53 to step 43.
Then, the same processing as described above is performed.

As described above, in both the first embodiment and the other embodiments, the user of the mobile device 3 sees the display on the display section 5 and the display section 13, removes the storage battery 4a from the connector 12a, and disconnects the commercial AC power supply 8, The storage battery 4a can be charged again by connecting to the storage battery charger 9 connected to the power adapter 7. and,
The charged storage battery 4a is connected to the connector 12a again. When the capacity of the storage battery 4b in use decreases,
Similarly to the above, the low voltage detection section 35 or 6a or 6b detects this and displays it on the display section 5.13, and the storage battery switching section 1 switches the storage battery from the storage battery 144a to the storage battery 4.
Switch to b. In this way, the connector 12a of the mobile device 3
, 12b or the storage battery connected to 4a%4b.

Due to the configuration described above, charging the storage battery of a mobile device is limited to locations where it can be connected to a commercial AC power source, and the cord connected to the commercial AC power source may cause a negative image. The problem will be fully resolved.

Note that the processes shown in the flowcharts shown in FIGS. 2 and 4 are performed at any time under the control of the control circuit 34.

Further, the number of storage batteries is not limited to two, but a plurality of storage batteries may be provided, so that when the capacity of the storage battery being used as a power source for operating the mobile device runs out, for example, storage battery 4 a-
+4 b→4 c-+4 d (here 4a.

4b, 4c, and 4d indicate storage batteries), the switching may be performed sequentially.

[Effects of the Invention] As explained above, in the wireless telephone device of the present invention, a plurality of rechargeable storage batteries are detachably attached to a mobile device, and when the capacity of the storage battery in use is exhausted, it is possible to switch to another storage battery. That's what I do.

Therefore, when charging the storage battery of a mobile device, there is no need to install the mobile device in a location where it can be connected to a commercial AC power source. Also, by looking at the display on the display means installed on the mobile device,
A user of a mobile device can easily charge a storage battery that has run out of capacity using a storage battery charger.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the radio telephone device of the present invention, FIG. 2 is a flowchart according to FIG. 1, FIG. 3 is a block diagram of a radio telephone device according to another embodiment, and FIG. Third
The flowchart shown in FIG. 5 is a diagram showing a conventional power supply method for a wireless telephone device. 1... Wired telephone line, 2... Parent device, 3... Mobile device, 4a, 4b... Storage battery, 5... Display section (displays that the storage battery has been switched due to voltage drop), 6a , 6b・
...Low voltage detection section, 11...Storage battery switching section, 1.2
a, 12b...Connector, 13...Display unit (voltage value display), 7...Power adapter, 8...Commercial AC power supply, 9...Storage battery charger, 34...Control circuit, 35・
...Low voltage detection section. Figure 1

Claims (1)

[Claims] A wireless telephone device comprising a parent device connected to a wired line and a mobile device connected to the parent device via a wireless line, and using a rechargeable storage battery as a power source for the mobile device. In this, a plurality of rechargeable storage batteries are removably installed in the mobile device, and when the capacity of the storage battery being used as a power source for the mobile device runs out, this storage battery is replaced with another storage battery installed in the mobile device. A wireless telephone device characterized in that the switching is made and a display means provided in the mobile device displays this fact.