JPH06232808A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To automatically register a new security code on a base unit and a hand set when the security codes respectively registered on the base unit and the hand set are not coincident or when the security code is lost on the hand set side. CONSTITUTION:This device is provided with detecting means 4 and 25 for detecting that a hand set B is mounted at a charger 2, sending means 39 for sending the old security code used to that moment from the hand set B to a base unit A and sending the new security code within fixed time after it is detected by the detecting means 25 that the hand set is mounted at the charger on the hand set side, and deciding means 41 for deciding whether the old security code sent from the hand set side is coincident with the security code registered on the base unit A or not on the base unit side and when both of security codes are not coincident, the new security code is registered on the base unit A and the hand set B after the lapse of fixed time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for charging a master unit connected to a general subscriber telephone line unit, a slave unit capable of communicating with the master unit through a wireless line unit, and a rechargeable battery of the slave unit. The present invention relates to a cordless telephone equipped with the charger.

[0002]

2. Description of the Related Art In a cordless telephone, for example, a cordless telephone used in the United States and the like, it is confirmed that the master unit and the slave unit are paired with each other, and the master unit and the slave unit are connected to each other. In order to prevent erroneous connection and erroneous billing between security codes, the security code is registered in the master unit and the slave unit. This security code is usually 24 as shown in the data format of FIG.
The code of bits is selectively used. Conventionally, as a security code registration method, for example, the following method has been proposed by the applicant of the present application in Japanese Patent Application No. 3-592.

That is, a detecting means for detecting that the slave unit is placed on the charger and a start switch for security code registration are provided, so that the slave unit is placed on the charger. When the start switch is operated within a fixed time after detection by the detection means, the security code is registered in the master unit and the slave unit.

[0004]

However, with the above method, even if the security code is lost on the slave unit side when the battery of the slave unit is replaced or when the battery of the slave unit is exhausted,
There is a problem that a new security code is not registered in the master unit and the slave unit unless the start switch for security-code registration is operated. Further, in this case, it is inconvenient that the telephone call cannot be made between the parent device and the child device.

Therefore, detection means for detecting that the slave unit is placed on the charger is provided, and the slave unit is detected within a certain time after the detector detects that the slave unit is placed on the charger. When the control code from the above is not detected by the data detecting means provided on the side of the base unit, a cordless telephone in which a new security code is registered in the base unit and the handset is first applied. Filed by a person (Japanese Patent Application No. 4)
-266043).

However, in this case, even if the security code does not match between the master unit and the slave unit on the same channel for some reason, the control signal is sent from the slave unit to the master unit within a certain time after placing the slave unit on the charger. Is sent, a new security code is not automatically registered in the master unit and the slave unit, so different security codes remain registered in the master unit and the slave unit, and between the master unit and the slave unit. It was inconvenient because it became impossible to make calls.

[0007]

In view of the above problems, the present invention is provided with a detecting means for detecting that a slave unit is mounted on a charger, and the slave unit is mounted on the charger at the slave unit side. The sending means for sending the old security code that has been used up to now to the parent machine from the slave unit within a fixed time after detecting that it has been placed and sending the new security code after the fixed time. Provided on the master unit side is a judging means for judging whether or not the old security code sent from the slave unit and the security code registered in the master unit are coincident with each other. When the two do not match, the new security code is registered in the master unit and the slave unit after the certain period of time.

[0008]

According to the present invention, when it is determined that the security code from the slave unit and the security code on the master unit side do not match within a fixed time after the slave unit is placed on the charger,
A new security code is registered in the master unit and the slave unit.

[0009]

1 and 2 are views showing an embodiment of a master unit A and a slave unit B constituting a cordless telephone of the present invention.

In FIG. 1 showing a master unit, 1 is an AC adapter for rectifying and smoothing a commercial AC power source and converting it to a DC power source, -2 is a charger integrally provided in the master unit A, and 3 is a charger 2. The first charging terminals 4 provided at 1 are charge detecting circuits as detecting means for detecting that the child device B is placed on the charger 2. Reference numeral 5 is an operation control means, which is composed of, for example, a 1-chip 4-bit microcomputer. The microcomputer 5 includes a program memory (ROM) 6, a data memory (RAM) 7, an IO port 8, a CPU 9, a counter 10 and the like. Reference numeral 11 is a security code registration start switch. Reference numeral 12 is a wireless line section, which includes a receiving antenna 13, a receiving circuit section 14, and a transmitting antenna 1.
5, and the transmission circuit unit 16. Reference numeral 17 designates a call path switching circuit for the main unit / slave unit, a ringer circuit, a keyboard,
The main device unit of the base unit including the handset (microphone and speaker) and the like, and is connected to the general subscriber telephone line unit 18. 19 is a backup battery for power failure, 20, 21
Is a diode for preventing backflow, 22 is a transmitting / receiving circuit section 16,
14 is a power supply control circuit. A rechargeable battery may be used as the backup battery. 40
Is a data detection unit from the child device B. Reference numeral 41 is a determination unit that compares the old security code sent from the slave B with the security code registered in the master A and determines whether or not the two security codes match.

On the other hand, in FIG. 2 showing the slave B, 23 is a rechargeable battery, for example, a Ni-Cd battery, and 24 is a second charging terminal connected to the positive and negative electrodes of the battery 23. By mounting the charger 2 on the charger 2, the first charging terminal 3 of the charger 2 and the second charging terminal 24 of the slave B are brought into contact with each other, and the charger 2
The charging battery 23 is charged through the charging terminals 3 and 24. Reference numeral 25 is a charge detection circuit as a detection means for detecting that the child device B is placed on the charger 2. Reference numeral 26 is an operation control means, which is composed of, for example, a 1-chip 4-bit microcomputer. Microcomputer 26
Has a program memory (ROM) 27, a data memory (RAM) 28, an IO port 29, a CPU 30, a counter 31, and the like. Reference numeral 32 denotes a wireless line section, which includes a receiving antenna 33, a receiving circuit section 34, a transmitting antenna 35, and a transmitting circuit section 36. 37 is a handset (microphone and speaker), 38 is a transmitting / receiving circuit section 36, 3
4 is a power supply control circuit of No. 4. 39 is a code sending means.

Although the judging means 41 of the master A and the sending means 39 of the slave B are shown as hardware in the block diagrams of FIGS. 1 and 2, they are actually realized by software.

Next, the operation when a new security code is registered in the master unit A and the slave unit B will be described with reference to the flowcharts of FIGS. 3 and 4.

First, the operation of the child device B will be described with reference to the flowchart of FIG.

When the handset B is placed on the charger 2, the charge detection circuit 25 of the handset B detects that the battery 23 of the handset B is in a charging state (S1), and the charge detection circuit 25 outputs a micro signal. A detection signal is sent to the computer 26. Upon receiving this detection signal, the microcomputer 26 detects whether 16 seconds have elapsed from the start of charging (S2). Further, the microcomputer 26 detects whether or not 3 seconds have elapsed from the start of charging (S3), and until 3 seconds have elapsed from the start of charging, the security that has been used until now from the slave unit B side to the master unit A side. Send the code (old security code) (S
4). When 3 seconds have passed from the start of charging, a new security code (new security code) is sent from the handset B side to the base A side by 16 seconds (S).
5). After that, it is detected whether or not a code indicating that the new security code has been registered is sent from the base unit A side (S6), and if this code is detected, 16 seconds have elapsed from the start of charging at that time. Even if not, the transmission of the new security code from the slave unit B side to the master unit A side is stopped (S7), and the new security code is also registered on the slave unit B side (S8).

Next, the operation on the base A side will be described with reference to the flow chart of FIG.

When the child device B is placed on the charger 2, the charging detection circuit 4 on the parent device A side detects that the battery 23 of the child device B is charged (S11). A detection signal is sent to the microcomputer 5. The microcomputer 5, which has received this detection signal, receives 6 from the start of charging.
It is detected whether or not 0 second has elapsed (S12). Furthermore, it is detected whether or not 3 seconds have elapsed from the start of charging (S13), and within 3 seconds, the old security code sent from the slave B and the security code registered in the master A are compared with each other. The computer 5 compares them and determines whether they match (S14). Then, when the old security code and the security code registered in the master A match, the flag is turned on (S1
5). Within 3 seconds from the start of charging, it is determined that both security codes match and the flag is turned ON, only when a new security code registration operation is manually performed (YES in S16), Updated with new security code.

After 3 seconds from the start of charging, whether or not the flag is turned on in the microcomputer 5, that is, the old security code sent from the child device B and the security code registered in the parent device A match. It is detected (S17) whether or not they match (when the flag is not ON), a new security code is registered in the parent device A. At this time, a code indicating that a new security code has been registered is transmitted from the master unit A to the slave unit B (S18).

As described above, according to the present embodiment, for some reason, the security codes registered in the master unit A and the slave unit B in the call channels of the master unit A and the slave unit B are misaligned. When the child device B is placed on the charger 2 with the security code lost on the child device B side, a new security code is registered in the parent device A and the child device B.

[0020]

The present invention is provided with a detection means for detecting that the slave unit is placed on the charger, and the detection means means that the slave unit is placed on the charger. Within a fixed time after detection, the slave unit is provided with sending means for sending the old security code that has been used up to now to the master unit, and sending the new security code after the fixed time. A determination means for determining whether or not the old security code sent from the slave unit and the security code registered in the master unit are provided, and when the security codes do not match, the constant After the time, the new security code will be registered in the master unit and the slave unit.
If the security codes registered in the master unit and slave unit do not match, or if the security code is lost on the slave unit side, the master unit and slave unit will automatically be operated without operating any switches. A new security code is registered.

[Brief description of drawings]

FIG. 1 is a block diagram of a master unit that constitutes a cordless telephone of the present invention.

FIG. 2 is a block diagram of a cordless handset constituting the cordless telephone of the present invention.

FIG. 3 is a flowchart for explaining the operation of the cordless handset of the present invention.

FIG. 4 is a flowchart for explaining the operation of the master unit of the cordless telephone of the present invention.

FIG. 5 is a format of data transmitted and received between a master unit and a slave unit of a cordless telephone.

[Explanation of symbols]

 A master unit B slave unit 2 charger 4, 25 detection circuit 5, 26 micro computer 12, 32 wireless line unit 39 code transmission unit 41 determination unit

Claims (1)

[Claims] 1. A master unit connected to a general subscriber telephone line unit, a slave unit capable of communicating with the master unit through a wireless line unit, and a charger for charging a charging battery of the slave unit. In the cordless telephone provided with, a detecting means for detecting that the slave unit is mounted on the charger is provided, and the slave unit side confirms that the slave unit is mounted on the charger. Within the fixed time after detection by the detection means, there is provided a sending means for sending the old security code used up to now to the parent machine from the child machine and sending a new security code after the predetermined time, The side has a judging means for judging whether or not the old security code sent from the slave unit and the security code registered in the master unit match, and the security codes do not match. When the above constant A cordless telephone characterized in that the new security code is registered in the master unit and the slave unit after a lapse of time.