JPH09191334A - Cordless telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect defective charging effectively by discriminating whether. or not a state of a charging current to a battery driven telephone set is excellent and discriminating whether or not a state of mounting the battery driven telephone set onto a charger is excellent. SOLUTION: When a slave set A is properly mounted onto a charger B, a hook switch 4b provided to a slave set mount detection circuit 4a is closed. Then one discrimination input is given to a discrimination circuit 6. The discrimination circuit 6 detects the input to discriminate it that the slave set A is properly mounted onto the charger B. When the slave set A is properly mounted onto the charger B and the charging current is normal, a charging lamp 2 is lighted. The charging lamp 2 keeps lighting after the succeeding charging. When the slave set A is moved from the charger B due to any cause and the mount state is improper, the charging lamp 2 is not lighted and a notice circuit 7 makes a notice to report it to the user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone and prevents charging failure of a telephone with a battery such as a cordless handset.

[0002]

2. Description of the Related Art Conventionally, as a charging failure detecting means of a charger for a cordless telephone, there has been a structure shown in FIG. 5, for example. In FIG. 5, A is a cordless telephone handset with a battery, B is a charger, and 1a is a telephone with a battery A
Charging terminal, 1b is a charging terminal of the charger B, 2 is a charging lamp for notifying the user of the charging state, 3 is a secondary battery mounted on the slave unit A charged from the charger B, 5 is a charging current detection circuit,
Reference numeral 6 is a charge state determination circuit, 7 is a notification circuit, 8 is a speaker 8, and 9 is a power supply circuit.

Next, the detailed operation will be described with reference to the flowchart of FIG. First, when the child device A is placed on the charger B, the charging lamp 2 remains unlit when the child device A is not properly placed on the charger B. When the child device A is properly placed on the charger B, the charging lamp 2 is turned on if the charging current is a normal value. During the subsequent charging, when the value of the charging current becomes abnormal, the charging lamp 2 is not lit, and the notification circuit 7 notifies the user of the charging failure. In other cases, the charging lamp 2
Continue lighting.

[0004]

The conventional charging method is generally based on the premise that the slave unit is properly placed on the charger. However, in reality, there are many cases where it is not properly placed, for example, during charging, if the slave unit comes off the charger for some reason and becomes an improper placement state, Even if the charging completion time has elapsed, there is a problem such as a non-charged state, and there has been a need for means for constantly detecting whether or not the child device is reliably placed on the charger.

There is a slave unit or a charger which detects whether or not the slave unit is placed on the charger, but in the conventional device, the charger of the slave unit is determined by, for example, charging current or charging voltage. There is only one that electrically detects the presence or absence of placement on the device, and it was not very effective as a detection means. Therefore, a more effective slave device placement detection method is needed.

The first invention not only determines whether or not the state of the charging current to the battery-equipped telephone is good, but also determines whether or not the state of placement of the battery-equipped telephone on the charger is good. By doing so, the purpose is to perform effective charging failure detection.

The second invention not only determines whether or not the state of the charging current to the battery-equipped telephone is good, but also determines whether or not the state of placement of the battery-equipped telephone on the charger is good. By doing so, the purpose is to perform effective charging failure detection with proper operation.

The third invention not only determines whether or not the state of the charging current to the telephone with the battery is good, but also determines whether or not the state of placement of the telephone with the battery on the charger is good. By doing so, the purpose is to perform effective charging failure detection with a more accurate operation.

A fourth aspect of the present invention not only determines whether or not the state of charge current to the battery-equipped telephone is good, but also determines whether or not the state of placement of the battery-equipped telephone on the charger is good. By doing so, the purpose is to perform effective charging failure detection with a more accurate operation.

A fifth aspect of the present invention not only determines whether or not the state of charge current to the battery-equipped telephone is good, but also determines whether or not the state of placement of the battery-equipped telephone on the charger is good. By doing so, it is an object of the present invention to perform effective charging failure detection with a proper operation with a simple configuration sharing elements.

[0011]

Means for Solving the Problems In the first invention,
A phone with a battery that is charged by being placed on a charger, a charging current detection device that detects the charging current to the phone with a battery, and a placement status detection that detects the placement status of the phone with a battery on the charger And a determination circuit that determines the charging state based on the outputs of the charging current detection device and the placement status detection device.

According to the second aspect of the present invention, there is provided a battery-equipped telephone which is charged by being placed on a charger, a charging current detection device for detecting a charging current to the battery-equipped telephone, and a battery-equipped telephone for the charger. A placement status detection device that detects the placement status,
The charging current detection device and the determination circuit for determining the charging state based on the outputs of the placement status detection device are provided, and the placement status detection device performs the detection operation by a hook switch that is activated by the placement of the telephone. .

According to a third aspect of the present invention, there are provided a telephone with a battery charged by being placed on a charger, a charging current detecting device for detecting a charging current to the telephone with the battery, and a telephone with a battery for the charger. A placement status detection device that detects the placement status,
The charging current detection device and a determination circuit for determining a charging state based on the outputs of the placement status detection device, and the placement status detection device performs a detection operation by an optical sensor that is operated by the placement of the telephone. is there.

According to a fourth aspect of the present invention, there are provided a telephone with a battery charged by being placed on a charger, a charging current detecting device for detecting a charging current to the telephone with the battery, and a telephone with a battery for the charger. A placement status detection device that detects the placement status,
The charging current detection device and a determination circuit for determining the charging state based on the outputs of the placement status detection device, and the placement status detection device performs a detection operation by a magnetic sensor that operates when the phone is placed. is there.

According to a fifth aspect of the present invention, there are provided a telephone with a battery charged by being placed on a charger, a charging current detecting device for detecting a charging current to the telephone with the battery, and a telephone with a battery for the charger. A placement status detection device that detects the placement status,
The charging current detection device and a determination circuit that determines the charging state based on the outputs of the placement status detection device, and the optical sensor of the placement status detection device is activated by the charging current to the telephone to display the charging status. And a light receiving element that operates by receiving the light from the charging lamp.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a block diagram illustrating a charging state detecting device for a charger for a cordless telephone according to an embodiment of the present invention.

In FIG. 1, A is a cordless telephone cordless telephone handset with a battery, B is a charger, 1a is a charging terminal on the cordless telephone handset A side, 1b is a charging terminal on the charger B side, 2 is a charging lamp for notifying the user of the charging state, 3
Is a secondary battery mounted on the slave unit A and charged from the charger B. Reference numeral 4 denotes a placement state detection device that detects whether or not the child device A is properly placed on the charger B, and the placement detection circuit 4
a and a hook switch 4b inserted in the placement detection circuit 4a. Reference numeral 5 is a charging current detection device including a charging current detection circuit, 6 is a determination circuit for determining the state of charge, 7 is a notification circuit, 8 is a speaker, and 9 is a power supply circuit.

The operation will be described with reference to the flowchart of FIG. First, when the child device A is placed on the charger B (step S1), it is determined whether the child device A is properly placed on the charger B (step S2). When the child device A is properly placed on the charger B, the hook switch 4b provided in the child device placement detection circuit 4a is pressed by a predetermined portion of the child device A to be in the ON state. As a result, one of the determination inputs is input to the determination circuit 6. The determination circuit 6 detects that this input is present and determines that the slave unit A is properly placed on the charger B (step A).
2).

When the slave unit A is not properly placed on the charger B, the hook switch 4B is in the OFF state, and the determination circuit 6 is not input as one determination input. The determination circuit 6 determines that the slave unit A is not properly placed on the charger B by detecting the absence of the input (step A2). In this way, when it is determined that the child device A is not properly placed on the charger B, the charging lamp 2 remains unlit (step S4).

When the slave A is properly placed on the charger B (step S2) and the charging current is normal (step S3)
Causes the charging lamp 2 to light up (step S5).

The charging lamp 2 continues to be lit during the subsequent charging, but if the slave A is disengaged from the charger B for some reason and becomes in an improperly placed state (step S2), or abnormal charging occurs. When the current is reached (step S3), the charging lamp 2
Is turned off and the user is notified by the notification from the notification circuit (step S4).

The placement status detection device 4 in this embodiment is inserted into the slave unit placement detection circuit 4a which is connected as one input of the determination circuit 6, and is suitable for the charger B of the slave unit A. The hook switch 4b that is closed by various mountings is used as the slave unit mounting detection means.

As described above, according to this embodiment,
A charging current detection device and a slave device placement detection device for detecting that the slave device is placed on the charger are provided, and whether the two types of detection devices are used in combination and whether the charging state is electrically good By not only judging whether or not it is physically good, but also by judging whether or not it is physically good, it is possible to perform more powerful charging failure detection.

Embodiment 2 FIG. FIG. 3 is a block diagram illustrating a charging state detecting device for a cordless telephone charger according to another embodiment of the present invention.

In FIG. 3, A is a cordless telephone cordless telephone handset with a battery, B is a charger, 1a is a charging terminal on the cordless telephone handset A side, 1b is a charging terminal on the charger B side, 2 is a charging lamp for notifying the user of the charging state, 3
Is a secondary battery installed in the slave unit A that is charged from the charger B, and 4 is a placement status detection device that detects whether or not the slave unit A is properly placed on the charger B. It has a circuit 4a. 5 is a charging current detection device, 6 is a determination circuit for determining the state of charge, 7 is a notification circuit, 8 is a speaker, 9 is a power supply circuit, and 10 is inserted in the placement detection circuit 4a of the placement status detection device 4. It is a light receiving element.

The operation flowchart is as shown in FIG. 2 as in the case of the first embodiment.

The operation will be described with reference to the flowchart of FIG. First, when the child device A is placed on the charger B (step S1), it is determined whether the child device A is properly placed on the charger B (step S2). When the child device A is properly placed on the charger B, the charging terminals 1a and 1b
The charging of the secondary battery 3 of the handset A is started by the connection of
The charging lamp 2 lights up. When the charging lamp 2 is turned on, the light receiving element 10 receives light and is turned on. As a result, one of the determination inputs is input to the determination circuit 6. The determination circuit 6 determines that the slave unit A is properly placed on the charger B by detecting the presence of this input (step S2).

When the slave unit A is not properly placed on the charger B, the light receiving element 10 is in the OFF state, and the determination circuit 6 is not input as one determination input. The determination circuit 6 determines that the slave unit A is not properly placed on the charger B by detecting the absence of input (step S).
2). In this way, when it is determined that the child device A is not properly placed on the charger B, the charging lamp 2 remains unlit (step S4).

When the slave A is properly placed on the charger B (step S2) and the charging current is normal (step S3)
Causes the charging lamp 2 to light up (step S5).

During the subsequent charging, the charging lamp 2 continues to be lit, but if the handset A comes off the charger B for some reason and becomes an improperly placed state (step S2), or abnormal charging occurs. When the current is reached (step S3), the charging lamp 2
Is turned off and the user is notified by the notification from the notification circuit (step S4).

The placement status detection device 4 in this embodiment is inserted in the slave unit placement detection circuit 4a which is connected as one input of the determination circuit 6, and is suitable for the charger B of the slave unit A. The light receiving element 10 that operates in response to the light from the charging lamp 2 when being mounted is used as a slave unit mounting detection means.

As described above, according to this embodiment,
A charging current detection device, a device that detects that the slave unit is mounted on the charger by the charging lamp of the slave unit that shares the function of light generation and the function of displaying the charging state and the optical sensor of the charger. By using both of the above-mentioned two types of detection devices together and not only determining whether or not the charging state is electrically good, but also physically determining the state of charge, it is possible to share parts. It is possible to detect the charging failure even more strongly.

Embodiment 3 FIG. 4 is a block diagram illustrating a charge state detecting device for a charger for a cordless telephone according to still another embodiment of the present invention.

In FIG. 4, A is a cordless telephone handset with a battery, B is a charger, 1a is a charging terminal on the handset A side with a battery, 1b is a charging terminal on the charger B side, 2 is a charging lamp for notifying the user of the charging state, 3
Is a secondary battery mounted in the slave unit A that is charged from the charger B, and 4 is a placement status detection device that detects whether or not the slave unit A is properly placed on the charger B. It has a circuit 4a. The device 5 is a charging current detection device, 6 is a determination circuit for determining the state of charge, 7 is a notification circuit, 8 is a speaker, and 9 is a speaker.
Is a power supply circuit. Reference numeral 11 is a magnetic sensor, 12 is a magnetic generator provided in a predetermined portion of the slave A, and 13 is a magnetic detection element inserted in the placement detection circuit 4a. The magnetic sensor 11 includes a magnetic detection element 13 provided in the placement detection circuit 4a of the placement status detection device 4 that is installed in the slave unit A when the magnetic detection element 13 is properly placed in the charger B of the slave unit A. By detecting the magnetic lines of force from the generating unit 12, it is turned on and input to the determination circuit 6.

The operation flowchart is as shown in FIG. 2 as in the first and second embodiments.

The operation will be described with reference to the flowchart of FIG. First, when the child device A is placed on the charger B (step S1), it is determined whether the child device A is properly placed on the charger B (step S2). When the child device A is properly placed on the charger B, the magnetic field generation unit 12 and the magnetic detection element 13 provided in the child device A face each other, and the magnetic field detection element 13 is removed from the magnetic field generation unit 12. The line of magnetic force is detected and it is turned on. As a result, one of the determination inputs is input to the determination circuit 6. The determination circuit 6 determines that the slave unit A is properly placed on the charger B by detecting the presence of this input (step S2).

When the slave unit A is not properly placed on the charger B, the magnetic detection element 13 is in the OFF state, and the determination circuit 6 is not input as one determination input.
The determination circuit 6 determines that the slave unit A is not properly placed on the charger B by detecting the absence of the input (step S2). In this way, when it is determined that the child device A is not properly placed on the charger B, the charging lamp 2 remains unlit (step S4).

When the slave A is properly placed on the charger B (step S2) and the charging current is normal (step S3).
Causes the charging lamp 2 to light up (step S5).

During the subsequent charging, the charging lamp 2 continues to be lit, but if the slave A is disengaged from the charger B for some reason and becomes in an improperly placed state (step S2), or abnormal charging occurs. When the current is reached (step S3), the charging lamp 2
Is turned off and the user is notified by the notification from the notification circuit (step S4).

The placement situation detecting device 4 in this embodiment is inserted in the slave unit placement detecting circuit 4a which is connected as one input of the judging circuit 6, and is suitable for the charger B of the slave unit A. The magnetic sensor 11 having the magnetic detection element 13 that operates in response to the magnetic force lines from the magnetic field generator 12 provided in the slave unit A by such mounting is used as the slave unit mounting detection means.

As described above, according to this embodiment,
A charging current detecting device; and a device for detecting that the slave unit is placed on the charger while preventing dust and the like from entering by means of the magnetic generation circuit of the slave unit and the magnetic detection circuit of the charger. Using more than one type of detection device together, not only to judge whether the charging state is electrically good or not, but also to judge whether it is physically good or not, to perform more powerful charging failure detection. Is possible.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a charge state detection device for a cordless telephone charger according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of the charging state detecting device for the cordless telephone charger according to the embodiment of the present invention.

FIG. 3 is a block diagram illustrating a state-of-charge detecting device for a charger for a cordless telephone according to another embodiment of the present invention.

FIG. 4 is a block diagram illustrating a state-of-charge detecting device for a charger for a cordless telephone according to still another embodiment of the present invention.

FIG. 5 is a block diagram illustrating a conventional charging state detecting device for a cordless telephone charger.

FIG. 6 is a flowchart explaining the operation of a conventional charging state detecting device for a cordless telephone charger.

[Explanation of symbols]

A handset, B charger, 1a Handset side charging terminal, 1b
Charger side charging terminal, 2 charging lamp, 3 secondary battery, 4
Placement status detection device, 4a Child device placement detection circuit, 4b Hook switch, 5 Charging current detection circuit, 6 Charging state determination circuit, 7 notification circuit, 8 speaker, 9 power supply circuit,
10 light receiving element, 11 magnetic sensor, 12 magnetic generation part, 13 magnetic detection element.

Claims (5)

[Claims] 1. A telephone with a battery that is charged by being placed on a charger, a charging current detection device that detects a charging current to the telephone with a battery, and a placement condition of the telephone with a battery on the charger. A cordless telephone, which is provided with a placement status detection device, and a determination circuit that determines a charging state based on the outputs of the charging current detection device and the placement status detection device. 2. A battery-equipped telephone that is charged by being placed on a charger, a charging current detection device that detects a charging current to the battery-equipped telephone, and a placement condition of the battery-equipped telephone on the charger. And a determination circuit that determines a charging state based on the outputs of the charging current detection device and the placement status detection device, wherein the placement status detection device is a hook switch that is activated by placement of the telephone. A cordless telephone characterized in that detection operation is performed by. 3. A battery-equipped telephone that is charged by being placed on a charger, a charging current detection device that detects a charging current to the battery-equipped telephone, and a placement condition of the battery-equipped telephone on the charger. And a determination circuit that determines a charging state based on the outputs of the charging current detection device and the placement status detection device, wherein the placement status detection device is an optical device that operates when the phone is placed. A cordless telephone characterized in that a detection operation is performed by a sensor. 4. A battery-equipped telephone that is charged by being placed on a charger, a charging current detection device that detects a charging current to the battery-equipped telephone, and a placement condition of the battery-equipped telephone on the charger. And a determination circuit that determines the charging state based on the outputs of the charging current detection device and the placement status detection device, wherein the placement status detection device is a magnetic device that operates when the telephone is placed. A cordless telephone characterized in that a detection operation is performed by a sensor. 5. A telephone with a battery that is charged by being placed on a charger, a charging current detection device that detects a charging current to the telephone with a battery, and a placement condition of the telephone with a battery on the charger. And a determination circuit that determines the charging state by the output of the charging current detection device and the placement status detection device, the optical sensor of the placement status detection device according to the charging current to the telephone. A cordless telephone comprising: a charging lamp that is energized to display its charging status; and a light-receiving element that operates by receiving light from the charging lamp.