JPH05130013A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To prevent malfunction due to unstable connection between a slave set and a master set by detecting it that the charging state is finished after a 2nd setting time of a 2nd timer corresponding to tentative connection interruption due to an unexpected external cause. CONSTITUTION:A charging state detection means 22 detects a charging state for each prescribed time under the control of a control section 23. When a slave set 2 is placed on a master set 1 and reaches the charging state, charging terminals 1A, 1B, 1C of the master set 1 are respectively in contact with charging terminals 2A, 2B, 2C of the slave set 2. In this case, the control section 23 of the slave set 2 implements the control of the case reaching the charging state from the non-charging state such as the end of talking state when the slave set 2 is in the talking state when a charge state detection means 22 detects the charging state from the non-charging state due to expiration of a timer 24, e.g. implements the control of the termination of the talking state when the slave set 2 is in the talking state. When the charge state detection means 22 of the slave set 2 changes from the charging state into the non-charging state, the count of the 2nd timer 25 is started to detect the non-charging state.

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 more particularly to detection of a state of charge suitable for use in a cordless telephone of a vertical type in which a cordless handset is placed vertically for charging.

[0002]

2. Description of the Related Art Conventionally, a cordless telephone has a rechargeable battery built in a slave unit, and a charging current supplying means for charging the rechargeable battery is provided in a master unit or a charger independent of the master unit. There is.

A conventional example will be described below with reference to the drawings. FIG. 5 is a block diagram showing a configuration of a conventional example. In the figure, 1 is a master unit connected to a telephone line (not shown), 11 is a charging current supply detecting means, 12 is a charging state notifying means, 2 is a slave unit to which communication with the master unit is connected by radio waves, 21 is a rechargeable battery, 22 is a state-of-charge detecting means, 2
3 is a control unit, and 24 is a timer. Here, it is assumed that the charging state detection means 22 of the child device 2 determines that the charging terminal 2A of the child device 2 is in the charging state when the logic level is “0” and is in the non-charging state when it is “1”. , Normal charging terminal 2A
Is at a logic level "1". Further, it is assumed that the charge level notification means 12 of the parent device 1 outputs a logic level "0".

The above-described components are described below. Next, their mutual relations and operations will be explained.
Under the control of the control unit 23, 2 is a fixed time (for example, 1
It is activated every 0 mSec) to detect the state of charge. When the child device 2 is placed on the parent device 1 and enters the charging state, the charging state detection means 22 checks whether or not the current charging state has already been detected (STEP 1), and the charging terminal 1A of the parent device 1 is checked. , 1B and 1C are in contact with charging terminals 2A, 2B and 2C of slave unit 2, respectively. When the charging terminals 1B and 2B come into contact with each other, a charging current is supplied from the charging current supply means 11 of the parent device 1 to the battery 21 of the child device 2 to charge the battery 21 of the child device 2. Also, charging terminals 1A and 2A
By the contact with and, the logic level of the charging terminal 2A of the handset 2 changes from "1" to "0" (STEP
2).

When the logic level of the charging terminal 2A is "1", that is, when the logic level of the charging terminal 2A changes from the non-charge state to the logic level "0", the charging state detecting means 22 of the handset 2 starts to count the timer 24 (STEP3). When the state of the logic level "0" continuously overflows for a certain time T0 set by the timer 24, it is detected that the handset 2 is in the charging state (STEP 4). The timer 24 is for preventing the detection from becoming unstable due to chattering when the charging terminals 1A to 1C and 2A to 2C come into contact with each other, and the set value T0 is several tens msec to 100 msec.
It is set to about mSec.

When the charging state detecting means 22 detects that the charging state detecting unit 22 has changed from the non-charging state to the charging state, the control unit 23 of the cordless handset 2 performs control when the charging state is changed from the non-charging state, for example, the cordless handset 2 If it is in a call state, it controls to activate the function to end the call state.

If the slave unit 2 is lifted from the charged state, the charging terminals 1A, 1B and 1C of the master unit 1 and the charging terminals 2A, 2B and 2C of the slave unit 2 are not in contact with each other, and the charging terminals of the slave unit 2 are not in contact with each other. The logic level of 2A is "0" to "1"
Changes to (STEP 5).

When the logic level of the charging terminal 2A is "0", that is, when the charge state changes from the charge state to the logic level "1", the charging state detecting means 22 of the slave unit 2 starts to count the timer 24 (STEP6). When the state of the logic level "1" continues for a certain period of time T0 defined by the timer 24 or more, it is detected that the slave unit 2 is in the non-charged state (STEP 7).

When the charging state detecting means 22 detects that the charging state is changed from the charging state to the non-charging state, the control unit 23 of the slave unit 2 performs control when the charging state is changed to the non-charging state, for example, in the charging state. When the handset 2 is lifted, control is performed such that a function for making a call immediately without pressing the call button is activated.

[0010]

However, the conventional configuration as described above is premised on the horizontal cordless telephone (FIG. 3) in which the cordless handset is placed horizontally for charging, and such a horizontal cordless telephone is used. In addition, it is considered that the handset does not wobble inadvertently due to external factors except that the user intentionally lifts the handset when the handset is in a charged state. As for the vertical cordless telephone (Fig. 4) that is charged by charging, the stability of the cordless handset is lower than that of the horizontal cordless telephone (Fig. 3). In addition to lifting the device, external factors such as touching the user's body or wobbling the place where the phone is installed may inadvertently wobble the handset and erroneously recognize the charging status. There is. For example, if you change from the charging state to the non-charging state while receiving an incoming call, you can immediately call without pressing the call button, and then end the call when you change from the non-charging state to the charging state during a call. Function to work continuously,
In the end, there was a problem that a period during which an incoming call could not be picked up might occur.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a cordless telephone which makes it difficult to erroneously detect the charging state even in the vertical cordless telephone (FIG. 4). To aim.

[0012]

In order to achieve this object, the cordless telephone of the present invention comprises a charging state notifying means connected to the first terminal and a charging current supplying means connected to the second terminal. A master unit, a charging state detecting means connected to a third terminal, a control section connected to the charging state detecting means, a first timer connected to the charging state detecting means and having a first set value, Similarly, it is connected to the charge state detecting means, is connected to a second timer having a second set value larger than the first set value, and is connected to a fourth terminal, and is connected to the charge current supply means of the master unit to charge current. And a cordless handset having a rechargeable battery, the first terminal and the third terminal, the second terminal and the fourth terminal are connected to each other during charging, and the charging state is The detection means is controlled by the control unit for a certain period of time. Is invoked bets, start the first timer by connecting the charge state notification means performs detection of the state of charge by the overflow activates the second timer by the non-connection of the charge state notification means,
The overflow is detected to detect the non-charged state.

[0013]

According to the present invention, with the above configuration, when the slave unit is connected to the master unit, it is detected that the charging state is entered after the first set value of the first timer corresponding to chattering or the like. When the cordless handset is disconnected from the base unit, the charging state is terminated after the second set value of the second timer corresponding to the temporary disconnection due to an inadvertent external factor. By detecting the above, it is possible to prevent malfunction of other functions that are automatically performed when charging starts and ends.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration diagram of a cordless telephone according to an embodiment of the present invention, and FIG. 2 is a flowchart showing its operation in common with the conventional example.

In the base unit 1 connected to the telephone line, 1
Reference numeral 1 is a charging current supply means, and 12 is a charging state notification means. In the child device 2 which is connected to the parent device 1 by radio waves, 21 is a rechargeable battery, 22 is a charge state detecting means,
Reference numeral 23 is a control unit, 24 is a first timer having a first set value T0, and 25 is a second timer having a second set value T1.

With respect to the cordless telephone having the above-mentioned components, the mutual relation and operation of the components will be described below. Here, the charging state detecting means 22 of the child device 2 determines that the charging terminal 2A is in the charging state when the logic level of the charging terminal 2A is "0" and is in the non-charging state when it is "1", and the normal charging terminal 2A is It is assumed to be at the logic level "1". Further, it is assumed that the charge level notification means 12 of the parent device 1 outputs a logic level "0".

Under the control of the control unit 23, the charge state detecting means 22 detects the charge state at regular time intervals as in the conventional example. When the slave unit 2 is placed on the master unit 1 and is in a charging state, the charging terminals 1A (first terminal), 1B (second terminal) and 1C of the master unit 1 are respectively the slave unit 2
Of the charging terminals 2A (third terminal), 2B (fourth terminal) and 2C. At this time, the charging state detecting means 22 does not detect charging within the time T0 (STEP
1). When the charging terminals 1B and 2B come into contact with each other, a charging current is supplied from the charging current supply means 11 of the base unit 1 to the battery 21 of the handset 2, and the battery 21 of the handset 2 is charged. Further, the contact between charging terminals 1A and 2A changes the logic level of charging terminal 2A of slave unit 2 from "1" to "0" (STEP2).

When the logic level of the charging terminal 2A is "1", that is, when the non-charge state changes from the non-charging state to the logic level "0", the charging state detecting means 22 of the slave unit 2 operates the first timer 2
4 starts to be counted (STEP 3), and when the state of the logic level "0" continuously overflows for a certain time T0 defined by the timer 24 or longer, it is detected that the handset 2 is in the charging state. Yes (STEP 4). In the control unit 23 of the cordless handset 2, the charge state detection unit 22 has
When it is detected that the charging state is changed from the non-charging state due to the overflow of 4, the control when the charging state is changed from the non-charging state, for example, the function of ending the talking state when the handset 2 is in the talking state, Take control.

If the slave unit 2 is lifted from the charged state, the charging terminals 1A, 1B and 1C of the master unit 1 and the charging terminals 2A, 2B and 2C of the slave unit 2 are no longer in contact with each other, and the slave unit 2 is charged. The logic level of the terminal 2A changes from "0" to "1" (STEP5). The charge state detection means 22 of the slave unit 2 counts the second timer 25 when the logic level of the charge terminal 2A changes from the state of "0", that is, the charge state to the state of the logic level "1", that is, the non-charge state. (STEP 6), when the state of the logic level “1” continuously overflows for a certain time T1 or more defined by the timer 25, it is detected that the handset 2 is in the non-charged state ( STEP 7).

When the charging state detecting means 22 detects that the charging state has changed from the charging state to the non-charging state, the control unit 23 of the slave unit 2 performs control when the charging state changes to the non-charging state, for example, in the charging state. When the handset 2 is lifted up, it controls functions such as making a call immediately without pressing the call button.

If the set value T of the timer 25 is set,
When 1 is in a charging state, the child device 2 is wobbling and charging terminals 1A and 2A
It is set to be shorter than the time when and are separated from each other, and when the handset 2 is lifted while receiving a call, that is, when the handset goes from the charging state to the non-charging state, the call button is immediately pressed. It is assumed that it has a function of making a call to and a function of ending the call when the state of charge changes from the non-charged state to the charged state. If the handset 2 wobbles while charging and receiving a call, the control when the handset goes from the charged state to the non-charged state, that is, the function that enables a call immediately without pressing the call button works. Is in a call. However, since the handset 2 returns to the charging state immediately, the control when the non-charging state is changed to the charging state during the call, that is, the function of ending the call works, and eventually the incoming call cannot be received. There will be an inconvenient period.
Therefore, if the set value of the timer 25 is set to a value T1 that is longer than the time when the cordless handset is wobbled and the charging terminals 1A and 2A are separated from each other, the above-mentioned inconveniences can be solved and the user can be sure. Only when the handset 2 is lifted to the control unit 2
3 controls when the charging state is changed to the non-charging state. This time T1 is about 3 of T0 of the previous timer 24.
Approximately 10 times (several hundred msec).

It should be noted that, in the present embodiment, the function of making a call immediately without pressing the call button when changing from the charging state to the non-charging state, and the case of changing from the non-charging state to the charging state during a call The function of ending a call is an example of a problem solved by the present invention, and the present invention is not particularly effective only for these functions.

Also, the numerical values such as the set values described above are examples, and can be changed as necessary.

Further, the communication between the master unit and the slave unit is not limited to electromagnetic waves, and infrared rays or other means may be used.

[0025]

As described above, in the cordless telephone of the present invention, when the slave unit is connected to the master unit, the charging state is reached after the first set value of the first timer corresponding to chattering or the like. When the slave unit disconnects from the master unit after detecting that it has entered, after the second set value of the second timer corresponding to the temporary disconnection due to careless external factors By configuring to detect that the charging state has ended, in addition to the user lifting the cordless handset when the vertically oriented cordless handset is in the charging state, external factors such as the user's If the handset touches or the location where the phone is installed wobbles carelessly, the cordless handset erroneously recognizes the charging status. With the function to call immediately without pressing the call button Next, when a call goes from a non-charged state to a charged state during a call, the function of ending the call works continuously, which eventually prevents a problem that there may be a period during which a call cannot be received. Its practical effect is enormous.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a cordless telephone according to an embodiment of the present invention.

FIG. 2 is an operation flowchart commonly used to describe the present invention and a conventional example.

FIG. 3 is an external perspective view of a horizontal cordless telephone.

FIG. 4 is an external perspective view of a vertical cordless telephone.

FIG. 5 is a block diagram showing a configuration of a conventional cordless telephone.

[Explanation of symbols]

 1 Master Unit 1A, 1B, 1C Charging Terminal 2 Slave Units 2A, 2B, 2C Charging Terminal 11 Charging Current Supplying Means 12 Charging State Notification Means 21 Battery 22 Charging State Detecting Means 23 Control Section 24 Timer 25 Timer

Claims (1)

[Claims] 1. A master unit having a charge state notification means connected to a first terminal, a charge current supply means connected to a second terminal, and a charge state detection means connected to a third terminal, A control unit connected to the charge state detection means, a first timer connected to the charge state detection means and having a first set value, and also connected to the charge state detection means,
A second timer having a second set value larger than the set value of, and a slave unit having a battery which is connected to the fourth terminal and which can be charged by obtaining a charging current from the charging current supply means of the master unit. Consisting of the first terminal, the third terminal, and the second terminal.
And the fourth terminal are connected to each other during charging,
The charge state detection unit is activated at regular intervals under the control of the control unit, the first timer is activated by the connection of the charge state notification unit, the charge state is detected by the overflow thereof, and the charge state notification is performed. A cordless telephone configured to start the second timer by disconnecting the means and detect an uncharged state by the overflow thereof.