JP2009088853A - Cordless telephone and its slave unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve power saving of the slave unit of a cordless telephone. <P>SOLUTION: An LCD panel 303 is provided on a front surface and an LED 307 is provided on a rear surface. There are provided: charge input contacts 309 and 309 which come into contact with charge output contacts 209 and 209 of a master unit 200 when placed at a specified position of the master unit 200; and a charge circuit 316 which charges a DC voltage VDC obtained at the charge input contacts 309 and 309 to a rechargeable battery 317. A detecting means 318 is provided as well which detects whether a front surface is facing outside or the rear surface is facing outside when placed at a specified position of the master unit 200. Based on the detection output from the detecting means 318, the element provided on the surface that is facing outside is operated, among the elements of LCD panel 303 and LED 307 to display the information sent from the master unit 200. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cordless telephone and a handset thereof.

  An example of a telephone system suitable for a small office such as an office is shown in FIG. That is, in FIG. 2, reference numeral 100 indicates each of a plurality of telephones. These telephones 100 are connected to the main apparatus 400, and a plurality of lines 401 to 40N are connected to the main apparatus 400. . The lines 401 to 40N may include a common analog telephone line, digital telephone line, IP (Internet Protocol) telephone line, or the like.

  Furthermore, the telephone 100 is configured as a cordless telephone. In this configuration, the main body of the telephone 100 is configured as a master unit, and the handset is configured as a slave unit, and the two are connected by radio waves. 3 and 4 show an example of the cordless telephone 100, FIG. 3 is a plan view thereof, and FIG. 4 is a side view thereof. Reference numeral 200 indicates a master unit, and reference numeral 300 indicates a slave unit. Note that a plurality of slave devices 300 may correspond to one master device 200.

  A cradle unit 201 is provided on the upper surface of the base unit 200. As shown in FIG. 3 and FIG. 4, the slave unit 300 is placed on the cradle unit 201 during standby. The subunit | mobile_unit 300 is picked up and used from the cradle part 201. FIG. Further, an LCD (Liquid Crystal Display) panel 203, a dial button 204, and various operation keys 205 for displaying the name of the destination and the destination, a telephone number, and the like are provided on the upper surface of the parent device 200, and child devices are provided on the side surface. A transmission / reception antenna 206 for communication with the apparatus 300 is provided.

  3 and 4, the slave unit 300 is placed on the cradle unit 201. The slave unit 300 is configured, for example, as shown in FIG. That is, FIG. 5A shows a front view of the slave unit 300, and FIG. 5B shows a rear view thereof. In this example, the slave unit 300 is configured as a flat and vertically long rectangular parallelepiped as a whole. When placed on the cradle unit 201 of 200, as shown in FIG. 3, it can be placed face down (rear side up) or face up (front side up).

  As shown in FIG. 5A, on the front (front surface) of handset 300, receiver 301, transmitter 302, LCD panel 303 as a display for displaying the name and telephone number of the destination and destination, dial buttons 304 and various operation keys 305 are provided, and a transmission / reception antenna 306 for communication with the parent device 200 is provided at the top.

  Further, as shown in FIG. 5B, an LED (Light Emitting Diode) 307 is provided on the rear surface (back surface) of the child device 300 as a display for displaying an incoming call or charging, and a speaker that outputs various ringing sounds. 308 is provided.

  Further, the child device 300 has a built-in rechargeable battery (not shown) as a power source, and the rechargeable battery is charged by the parent device 200. Therefore, as shown in FIG. 2 to FIG. 5, a pair of charging input contacts 309 and 309 for charging are provided on the bottom surface of the child device 300, and the child device 300 is connected to the parent device 200. A pair of charging output contacts 209 and 209 for charging are provided at positions where the input contacts 309 and 309 come into contact with each other when placed on the cradle unit 201 of 200.

  In this case, when the child device 300 is placed on the receiving table 201, the input contacts 309 and 309 of the child device 300 are connected to the parent device regardless of whether the child device 300 is placed face down or face up as shown in FIG. The contacts 209, 209, 309, and 309 are arranged so as to contact the 200 output contacts 209 and 209.

  The states of the lines 401 to 40N, the parent device 200, and the child device 300 are all grasped and managed by the main device 400, and each of the telephones 100 is selectively set to the lines 401 to 40N by the processing and control of the main device 400. , And incoming calls and outgoing calls, or extension calls and transfers between the telephones 100 are realized.

  Therefore, the handset 300 can be used in the same way as a handset of a general telephone, and at this time, the curl cord that connects the telephone body and the handset as in a general telephone is not obstructed, and the usability is improved. To do. In addition, since it is possible to make a call while the child device 300 is separated from the parent device 200, a plurality of child devices 300 can be associated with one parent device 200, so that it is more convenient in an office or the like. Can be used.

  Further, for example, the LCD panel 303 and the LED 307 are displayed in a sequence as shown in FIG. 6, and charging or incoming calls are displayed.

For example, there are the following prior art documents.
JP-A-6-62097

  By the way, in the telephone system as shown in FIG. 2, a commercial AC voltage is supplied to the main device 400, and the operating voltage is supplied from the main device 400 to the parent device 200 through the call cable 410. A voltage for charging is supplied to the slave unit 300. In other words, in such a case, there is no need to connect an AC (Alternating Current) adapter for power supply to the main unit 200, so that there is less restriction on the installation location of the telephone 100, and between the telephone 100 and the main device 400. The cable 410 can be easily routed.

  However, in this case, since a plurality of telephones 100 are connected to the main apparatus 400, if the power consumption of the handset 300 of these telephones 100 is large, the burden on the power supply of the main apparatus 400 increases. It is also necessary to consider the power loss in the cable 410 between the main device 400 and the parent device 200. Furthermore, if the power consumption of the slave unit 300 is large, the callable time of the slave unit 300 is shortened.

  The present invention is intended to solve the above problems.

In this invention,
With the parent machine,
It has this handset and a handset connected via radio waves,
The master unit has a pair of charging output contacts that output a DC voltage for charging,
The above handset is
A first display provided in front thereof;
A second display provided on the rear surface;
A rechargeable battery that supplies its operating voltage to its components;
A pair of charging input contacts that contact the pair of charging output contacts when placed in a predetermined position of the base unit;
A charging circuit for charging the rechargeable battery with a DC voltage obtained at the pair of charging input contacts;
Detecting means for detecting whether the front is face up or the rear face is face up when placed at the predetermined position of the base unit;
A cordless telephone configured to display information sent from the base unit by operating a display provided on the surface facing out of the first and second displays according to the detection output of the detection means. It is what.

  According to the present invention, there are displays on the front surface (front surface) and the rear surface (rear surface) of the slave unit, but the displays are controlled in accordance with how the slave unit 300 is placed. The consumption current of the slave unit can be reduced, and so-called energy saving can be realized.

  In addition, even when a large number of master units and slave units are connected to the main unit, the power load on the main unit can be reduced and power loss in the cable between the main unit and the main unit can be reduced. Can do.

[1] Overall configuration of telephone system and configuration example of parent device and child device FIG. 1 shows an embodiment of the present invention, and the parent device 200 and the child device 300 of the telephone 100 are cordless as described in FIGS. The master unit 200 is connected to the main apparatus 400. The relationship between the telephone 100 and the main device 400 is also as described above. For example, the slave device 300 is connected to any of the lines 401 to 40N through the master device 200 and the main device 400.

  Master device 200 includes wireless communication circuit 211, system control circuit 212 configured by a microcomputer, and power supply circuit 213. In this case, the wireless communication circuit 211 connects the slave device 300 and the main device 400 through the master device 200 to enable outgoing and incoming calls. For this reason, although not shown, the wireless communication circuit 211 includes an audio circuit and a transmission / reception circuit, and is connected to the main apparatus 400 and is connected to the antenna 206 and controlled by the control circuit 212. The control circuit 212 is connected to an LCD panel 203, a dial button 204, various operation keys 205, and a speaker 208 that outputs various ringing sounds.

  Further, the power supply circuit 213 is supplied with a DC voltage from the main device 400 through the cable 410 to form a necessary DC voltage in each part of the parent device 200, and this DC voltage is supplied to each part of the parent device 200 as its operating voltage. The Further, a DC voltage VDC for charging is taken out from the power supply circuit 213, and this voltage VDC is output to the contacts 209 and 209.

  On the other hand, the slave unit 300 includes a wireless communication circuit 311 and a system control circuit 312 configured by a microcomputer. In this case, the wireless communication circuit 311 is connected to the main device 400 through the parent device 200 and enables the child device 300 to make and receive calls. Therefore, the wireless communication circuit 311 has an audio circuit and a transmission / reception circuit (not shown), and is connected to the handset 301 and the handset 302 and to the antenna 306, and is controlled by the control circuit 312. The

  Further, the control circuit 312 includes an LCD panel 303 that displays a destination and destination name and telephone number, a dial button 304 and various operation keys 305, an LED 307 that displays incoming calls and charging, and various ringing sounds. Is connected, and an antenna 306 for communication with the parent device 200 is connected.

  Although not shown, the LCD panels 203 and 303 have a backlight and are driven by the control circuits 212 and 312 respectively.

  Therefore, at the time of outgoing and incoming calls, the voice signal from the transmitter 302 is made a transmission signal by the wireless communication circuit 311, and this transmission signal is sent to the parent device 200 through the antenna 306. Then, in base unit 200, the transmission signal from slave unit 300 is received by antenna 206, the received signal is supplied to radio communication circuit 211, and an audio signal is taken out. And sent to the other party's telephone through one of the telephone lines 401 to 40N.

  Also, a voice signal from the other party's telephone is supplied from the main device 400 to the wireless communication circuit 211 as a transmission signal, and this transmission signal is transmitted to the slave unit 300 through the antenna 206. Then, in handset 300, the transmission signal from base unit 200 is received by antenna 306, the received signal is supplied to radio communication circuit 311, the voice signal is extracted, and this voice signal is supplied to receiver 301. . Therefore, it is possible to make a call with the other party using the handset 300.

  Further, when the child device 300 is placed on the cradle unit 201 of the parent device 200, the contacts 209 and 209 of the parent device 200 come into contact with the contacts 309 and 309 of the child device 300. A DC voltage VDC for charging from 200 is obtained. However, in this case, the polarity of the DC voltage VDC obtained at the contacts 309 and 309 is inverted between when the slave unit 300 is placed face down as shown in FIG. 3 and when it is placed face up.

  Therefore, the DC voltage VDC obtained at the contacts 309 and 309 is supplied to, for example, a double-wave rectifier circuit 315 configured by a diode bridge, and the double-wave rectifier circuit 315 has the same polarity regardless of how the slave unit 300 is placed. The arranged DC voltage VDC is taken out. Then, the DC voltage VDC is supplied to the charging circuit 316 to form the charging voltage VCG, and the charging voltage VCG is supplied to the rechargeable battery 317 for the power source of the slave unit 300 to be charged. The output voltage of the rechargeable battery 317 is supplied to each part of the slave unit 300 as its operating voltage.

  Further, the charging circuit 316 detects whether or not the DC voltage VDC is supplied to the charging circuit 316, thereby detecting whether or not the child device 300 is placed on the cradle unit 201 of the parent device 200. The signal SDC is supplied to the control circuit 312.

  Further, the DC voltage VDC supplied to the contacts 309 and 309 is supplied to the polarity detection circuit 318, and the slave unit 300 detects the polarity of the DC voltage VDC at the contacts 309 and 309, whereby the slave unit 300 receives the cradle unit 201 of the master unit 200. 3 is detected whether it is placed face down or face up as shown in FIG. 3, for example “1” when placed face down, and when placed face up. The detection signal SUD that becomes “0” is extracted, and this detection signal SUD is supplied to the control circuit 312.

[2] Operation In the configuration as described above, when the slave unit 300 is placed in the master unit 200, the contacts 209 and 209 are in contact with the contacts 309 and 309, and the DC voltage VDC is supplied to the charging circuit 316. Battery 317 is charged with voltage VCG. At this time, the magnitude of the charging current is detected by the charging circuit 316 and notified to the control circuit 312. When the battery is fully charged and, for example, the charging current is reduced, the control circuit 316 controls the charging circuit 316, the charging voltage VCG is turned off, and the charging is terminated.

  Further, when the child device 300 is placed in the parent device 200, the DC voltage VDC is supplied to the charging circuit 316, so that the control circuit 312 causes the child device 300 to be placed in the parent device 200 by the detection signal SDC. You can know if you are.

  The master device 200 is notified of information such as the usage status of the lines 401 to 40N from the main device 400, and information necessary for the user is displayed on the LCD 203. For example, if the line 401 is in use, this is notified from the main device 400 to the master unit 200 and displayed on the LCD panel 203 to inform the user that the line 401 cannot be used. Further, on the LCD 203, the control circuit 212 displays the state of the master unit 200, for example, that it is possible to make a call if it is in a standby state.

  Further, these pieces of information are notified from the control circuit 21 of the parent device 200 to the control circuit 312 through the communication circuit 211 and the communication circuit 311. As a result, when the child device 300 is placed in the parent device 200, the display of the LCD panel 303 and the LED 307 in the child device 300 is controlled by the control circuit 312 as follows.

[2-1] When handset 300 is placed face down When handset 300 is placed on cradle 201 of base unit 200, it is placed face down as shown in FIG. This is detected by the detection circuit 318, and the control circuit 312 is notified that the detection circuit S318 (SUD = "1") is placed face down.

  Then, in this case, if charging is in progress, the LED 307 is continuously lit to inform the user that the slave unit 300 is being charged and is in a standby state. However, in this case, the drive of the LCD panel 303 is stopped, the backlight is turned off, and the display of the LCD panel 303 is turned off.

  When there is an incoming call, this is notified to the slave unit 300 through the master unit 200. When this incoming call notification is received, the LED 307 is blinked by the control circuit 312 and a ringer sound is output from the speaker 308. The user is informed that there is an incoming call.

  Then, when the slave unit 300 is picked up from the master unit 200 and an off-hook key operation is performed, the master unit 200 and the slave unit 300 are connected, and the master unit 300 is connected to the incoming line through the main unit 400. . Therefore, after that, it is possible to make a call with the other party.

[2-2] When the slave unit 300 is placed face up The slave unit 300 is placed on the cradle unit 201 of the master unit 200. If the slave unit 300 is placed face up, this is detected by the detection circuit 318. It is detected and the control circuit 312 is notified that the signal is placed face up by the detection signal SUD (SUD = “0”).

  Then, in this case, the LCD panel 303 is driven by the control circuit 312 and the backlight is turned on, and information sent from the parent device 200, that is, displayed on the LCD panel 203 of the parent device 200. Information is displayed on the LCD panel 303. If charging is in progress, this is also displayed on the LCD panel 303. However, in this case, the LED 307 is turned off.

  When there is an incoming call, this is notified to the slave unit 300 through the master unit 200. When this incoming call notification is received, the backlight of the LCD panel 303 is turned on by the control circuit 312 and the speaker 308 is used. A ringer sound is output to inform the user that there is an incoming call.

  Then, when the slave unit 300 is picked up from the master unit 200 and an off-hook key operation is performed, the master unit 200 and the slave unit 300 are connected, and the master unit 300 is connected to the incoming line through the main unit 400. . Therefore, after that, it is possible to make a call with the other party.

[3] Summary According to the slave unit 300 described above, the LCD panel 303 and the LED 307 are provided for display. However, when the slave unit 300 is placed face down on the master unit 200 as shown in FIG. Since only the LED 307 is lit and only the LCD panel 303 performs display when placed face up, current consumption can be reduced, and so-called energy saving can be realized.

  Further, even when a large number of master units 200 and slave units 300 are connected to main apparatus 400, the power load on main apparatus 400 can be reduced, and cable 410 between main apparatus 400 and main unit 200 can be reduced. The power loss in can be reduced. Furthermore, since the power consumption of the child device 300 is reduced, the callable time and standby time of the child device 300 become longer.

[4] Others In the above description, the child device 300 is placed in the parent device 200. However, the child device 300 is charged as when a plurality of child devices 300 correspond to one parent device 200. Similarly, when placed on the table, the orientation of the slave unit 300 can be detected and the display mode of the LCD panel 303 and the LED 307 can be switched.

  Further, in the above description, the orientation when the slave unit 300 is placed on the master unit 200 is detected based on the polarity of the DC voltage VDC supplied to the contacts 309 and 309. In addition to providing a switch, the actuator can be projected to the outside of the rear surface of the slave unit 300, and the orientation of the slave unit 300 can be detected from whether or not the actuator is pressed. Alternatively, a weight that is displaced depending on the orientation of the slave device 300 and a switch element that is turned on / off by the displacement of the weight are provided in the slave device 300, and the orientation of the slave device 300 can be detected from the switch output. it can.

  Further, for example, a magnetic field detection element such as a Hall element is provided at a position facing the speaker or the magnet built in the parent device 200 in the child device 300, so that the child device 300 faces the parent device 200 face down. The orientation of handset 300 can also be detected from the difference in magnetic field between when placed and when placed face up. In the above description, charging of the rechargeable battery 317 is detected by the charging circuit 316 of the child device 300. However, the charging can be detected by providing a charging detection circuit in the parent device 200.

It is a systematic diagram showing one embodiment of the present invention. It is a figure which shows an example of the telephone system which can apply this invention. It is a top view which shows an example of the telephone which can apply this invention. It is a side view which shows an example of the telephone which can apply this invention. It is the top view and rear view which show an example of the subunit | mobile_unit which can apply this invention. It is a figure which shows an example of the display sequence of a subunit | mobile_unit.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Telephone, 200 ... Base unit, 201 ... Base part, 203 ... LCD panel, 206 ... Transmission / reception antenna, 209 ... Charging output contact, 211 ... Wireless communication circuit, 212 ... System control circuit, 213 ... Power supply circuit, 300 ... Slave unit, 301 ... receiver, 302 ... transmitter, 303 ... LCD panel, 306 ... transceiver antenna, 309 ... charge input contact, 311 ... wireless communication circuit, 312 ... system control circuit, 315 ... double wave rectifier circuit, 316 ... Charging circuit, 317 ... rechargeable battery, 318 ... polarity detection circuit, 400 ... main unit, 401-40N ... line

Claims (4)

With the parent machine,
It has this handset and a handset connected via radio waves,
The master unit has a pair of charging output contacts that output a DC voltage for charging,
The above handset is
A first display provided in front thereof;
A second display provided on the rear surface;
A rechargeable battery that supplies its operating voltage to its components;
A pair of charging input contacts that contact the pair of charging output contacts when placed in a predetermined position of the base unit;
A charging circuit for charging the rechargeable battery with a DC voltage obtained at the pair of charging input contacts;
Detecting means for detecting whether the front is face up or the rear face is face up when placed at the predetermined position of the base unit;
A cordless telephone configured to display information sent from the base unit by operating a display provided on the surface facing out of the first and second displays according to the detection output of the detection means. . A first display provided on the front;
A second display provided on the rear surface;
A rechargeable battery that supplies its operating voltage to its components;
A pair of charge input contacts that contact the pair of charge output contacts of the master unit when placed in a predetermined position of the master unit;
A charging circuit for charging the rechargeable battery with a DC voltage obtained at the pair of charging input contacts;
Detecting means for detecting whether the front is face up or the rear face is face up when placed at the predetermined position of the base unit;
A cordless telephone configured to display information sent from the base unit by operating a display provided on an upward facing surface of the first and second displays in accordance with the detection output of the detection means. Child machine. In the subunit | mobile_unit of Claim 2,
A cordless telephone cordless handset having a dual-wave rectifier circuit that supplies the charging circuit after adjusting the polarity of a DC voltage obtained at the pair of charging input contacts. In the subunit | mobile_unit of Claim 3,
The first display is an LCD panel;
The cordless phone slave unit in which the second display is an LED.

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