JP3109183B2 - Cordless telephone - Google Patents

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 charging state suitable for use in a vertical cordless telephone in which a slave unit is placed vertically and charged.

[0002]

2. Description of the Related Art Conventionally, a cordless telephone has a built-in rechargeable battery in a slave unit and a charging current supply means for charging the rechargeable battery in a base unit or a charger independent of the base unit. I have.

Hereinafter, a conventional example will be described with reference to the drawings. FIG. 5 is a block diagram showing a configuration of a conventional example. In the figure, 1 is a base unit connected to a telephone line (not shown), 11 is a charging current supply detection unit, 12 is a charging state notification unit, 2 is a slave unit that communicates with the base unit by wireless radio waves, 21 is a rechargeable battery, 22 is a charged state detecting means, 2
3 is a control unit, and 24 is a timer. Here, the charging state detection means 22 of the child device 2 determines that the charging state is at the time when the logic level of the charging terminal 2A of the child device 2 is “0”, and that it is at the non-charging state when it is “1”. , Normal charging terminal 2A
Is at logic level "1". It is also assumed that the logic level “0” has been output from the charge state notification means 12 of the base unit 1.

[0004] The following description will be made of the relationship between the components and the operation.
2 is a predetermined time (for example, 1
(Every 0 mSec) to detect the state of charge. When the slave unit 2 is placed on the master unit 1 and is in a charged state, the charge state detection unit 22 checks whether or not the charge state is already detected (STEP 1). The charging terminal 1A of the master unit 1 , 1B, and 1C contact 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, and the battery 21 of the child device 2 is charged. Also, charging terminals 1A and 2A
, The logic level of the charging terminal 2A of the slave unit 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-charging state to the logic level "0", the charging state detecting means 22 of the slave unit 2 starts counting by the timer 24 (STEP 3). When the state of the logical level "0" continuously overflows for a certain period of time T0 set by the timer 24, it is detected that the slave unit 2 has been charged (STEP 4). The timer 24 is used to prevent the detection from becoming unstable due to chattering when the charging terminals 1A to 1C and 2A to 2C come and go, and the set value T0 is several tens mSec to 100
It is set to about mSec.

When the control unit 23 of the slave unit 2 detects that the state-of-charge detection unit 22 has changed from the non-charged state to the charged state, the control unit 23 controls the state of the slave unit 2 from the non-charged state to the charged state. If the user is in a call state, control such as activating a function to end the call state is performed.

[0007] If the child device 2 is lifted from the charged state, the charging terminals 1A, 1B and 1C of the parent device 1 and the charging terminals 2A, 2B and 2C of the child device 2 do not come into contact with each other. The logic level of 2A changes from "0" to "1"
(STEP 5).

When the logic level of the charging terminal 2A changes from "0", that is, from the charging state to the logic level "1", the charging state detecting means 22 of the slave unit 2 starts counting by the timer 24 (STEP 6). When the state of the logic level "1" continues for a certain time T0 or more defined by the timer 24, it is detected that the slave unit 2 has become non-charged (STEP 7).

When the control unit 23 of the slave unit 2 detects that the charging state detecting unit 22 has changed from the charging state to the non-charging state, the control unit 23 performs control when the charging state changes to the non-charging state, for example, in the charging state. When the slave unit 2 is lifted, control is performed to activate a function that allows a user to immediately talk without pressing the talk button.

[0010]

However, in the above-described conventional configuration, a horizontal cordless telephone (FIG. 3) in which a portable unit is placed sideways for charging is premised, and such a horizontal cordless telephone is used. In the above, it is thought that it is unlikely that the slave unit will be inadvertently shaken due to external factors except when the user intentionally lifts the slave unit when the slave unit is in the charged state. The vertical cordless telephone (FIG. 4), which is charged by charging, is less stable than the horizontal cordless telephone (FIG. 3). In addition to lifting the machine, external factors such as the touch of the user's body and the location of the phone may fluctuate, causing the handset to wobble carelessly and incorrectly recognizing the charging status There is. For example, a function that allows you to talk immediately without pressing the call button when the phone goes from a charged state to a non-charged state during an incoming call, and ends the call when you go from a non-charged state to a charged state during a call Function works continuously,
In the end, there is a problem that a period during which a call cannot be received may occur.

SUMMARY OF THE INVENTION 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 a charged state even in the vertical cordless telephone (FIG. 4). Aim.

[0012]

In order to achieve this object, a cordless telephone according to the present invention comprises a charging state notifying means connected to a first terminal and a charging current supply means connected to a second terminal. A base unit having: 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; A second timer having a second set value larger than the first set value, the second timer being connected to the charge state detecting means and a fourth terminal connected to the charge current supply means of the master unit; The first terminal and the third terminal, and the second terminal and the fourth terminal are connected to each other at the time of charging. The detecting means is controlled by the control unit for a predetermined 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 non-charged state is detected by the overflow.

[0013]

According to the present invention, when the slave unit is connected to the master unit, the present invention detects the fact that the slave unit has entered the charging state after the first set value of the first timer corresponding to chattering or the like. When the slave unit is disconnected from the master unit, the charge state ends after the time set by the second timer corresponding to the temporary disconnection due to an inadvertent external factor. , The function of preventing malfunction of other functions automatically performed at the start and end of charging.

[0014]

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 one embodiment of the present invention, and FIG. 2 is a flowchart showing an operation common to the conventional example.

In the base unit 1 connected to the telephone line, 1
Reference numeral 1 denotes charging current supply means, and 12 denotes charging state notification means. In the slave unit 2 in which communication with the master unit 1 is connected by a radio wave, 21 is a rechargeable battery, 22 is a charged state detecting means,
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.

The relationship between the components and the operation of the cordless telephone having the above components will be described below. Here, the charging state detecting means 22 of the child device 2 determines that the charging state is the charging state when the logic level of the charging terminal 2A is "0" and the non-charging state when the logic level of the charging terminal 2A is "1". It is assumed that the logic level is “1”. It is also assumed that the logic level “0” has been output from the charge state notification means 12 of the base unit 1.

The state-of-charge detecting means 22 detects the state of charge at regular intervals, as in the prior art, under the control of the control unit 23. When the child device 2 is placed on the parent device 1 to be charged, the charging terminals 1A (first terminal), 1B (second terminal), and 1C of the parent device 1 are connected to the child device 2 respectively.
Contact 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 master unit 1 to the battery 21 of the slave unit 2, and the battery 21 of the slave unit 2 is charged. When the charging terminals 1A and 2A come into contact with each other, the logic level of the charging terminal 2A of the slave unit 2 changes from "1" to "0" (STEP 2).

When the logical level of the charging terminal 2A is "1", that is, when the logical level of the charging terminal 2A changes from the non-charging state to the logical level "0", the charging state detecting means 22 of the slave unit 2 sets 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 period of time T0 defined by the timer 24, it is detected that the slave unit 2 is in the charged state. (Step 4). The control unit 23 of the slave unit 2 determines that the charging state detection unit 22 has the timer 2
When it is detected from the non-charged state to the charged state due to the overflow of 4, the control when the non-charged state is changed to the charged state, for example, a function of terminating the talk state when the slave unit 2 is in the talk state. Perform control.

If the child unit 2 is lifted from the charged state, the charging terminals 1A, 1B and 1C of the parent unit 1 and the charging terminals 2A, 2B and 2C of the child unit 2 do not come into contact with each other. The logic level of the terminal 2A changes from "0" to "1" (STEP 5). When the logic level of the charging terminal 2A changes from the state of “0”, that is, the charging state, to the state of the logic level “1”, that is, the non-charging state, the charging state detecting means 22 of the child device 2 counts the second timer 25. Is started (STEP 6), and when the state of the logic level "1" continuously overflows for a certain period of time T1 defined by the timer 25, it is detected that the slave unit 2 is in the non-charged state (step 6). (STEP 7).

When the control unit 23 of the slave unit 2 detects that the charging state detecting unit 22 has changed from the charging state to the non-charging state, the control unit 23 performs control when the charging state changes to the non-charging state. When the handset 2 is lifted, control such as a function that allows a call to be made immediately without pressing the call button is performed.

Here, if the set value T of the timer 25 is
1 is in the charging state, the handset 2 is shaky, and the charging terminals 1A and 2A
Is set to be shorter than the time when the mobile phone is separated, and when the mobile phone 2 is lifted during the incoming call, that is, when the mobile phone is switched from the charged state to the non-charged state, the mobile phone 2 does not need to press the talk button. It is assumed that the mobile phone has a function of making a call and a function of terminating the call when the mobile phone changes from a non-charged state to a charged state during the call. If the handset 2 fluctuates during charging and an incoming call, first, control is performed in a case where the handset is changed from a charged state to a non-charged state, that is, a function that allows a call to be made immediately without pressing a talk button is activated. Is in a call state. However, since the handset 2 immediately returns to the charged state, the control when the charged state is changed from the non-charged state to the charged state during the call, that is, the function of terminating the call works, and the call cannot be eventually picked up. That is, a defective period will occur.
Therefore, if the set value of the timer 25 is set to a value T1 longer than the time that the charging terminals 1A and 2A are separated due to the wobble of the slave unit, the above-described problem can be solved, and the user can be sure. Control unit 2 only when handset 2 is lifted
Numeral 3 controls when the state changes from the charged state to the non-charged state. This time T1 is about three times larger than T0 of the previous timer 24.
Approximately to 10 times (several hundred mSec).

Note that the present embodiment provides a function that allows the user to immediately talk without pressing the talk button when the charging state changes to the non-charging state, and the function for changing from the non-charging state to the charging state during the talking. 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.

The numerical values such as the set values described above are merely examples, and can be changed as needed.

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

[0025]

As described above, the cordless telephone according to the present invention has a charge state after the first set value of the first timer corresponding to chattering or the like when the slave unit is connected to the master unit. Is detected, and when the slave unit is disconnected from the master unit, after the time of the second set value of the second timer corresponding to the temporary disconnection due to an inadvertent external factor, By configuring to detect that the charging status has ended, in addition to the user lifting the child device when the vertical type child device is in the charging state, external factors such as the user's If the handset is inadvertently shaken due to touching the body or the location of the phone, etc., it may be incorrectly recognized as being in a charged state. A function that allows you to call immediately without pressing the call button Next, the function of terminating the call when the state is changed from the non-charged state to the charged state during the call works continuously, thereby preventing a problem that a period during which a call cannot be received may be eventually generated. The practical effects are significant.

[Brief description of the drawings]

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

FIG. 2 is an operation flowchart commonly used for describing 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 the configuration of a conventional cordless telephone.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 master unit 1A, 1B, 1C charging terminal 2 slave unit 2A, 2B, 2C charging terminal 11 charging current supply unit 12 charging state notification unit 21 battery 22 charging state detection unit 23 control unit 24 timer 25 timer

Claims (1)

(57) [Claims] 1. A master unit having charging state notification means connected to a first terminal, charging current supply means connected to a second terminal, and charging state detection means connected to a third terminal, A control unit connected to the state-of-charge detection means, a first timer connected to the state-of-charge detection means and having a first set value, also connected to the state-of-charge detection means,
A second timer having a second set value that is larger than the set value of the sub-unit, connected to a fourth terminal, and having a battery that can be charged by obtaining charging current from charging current supply means of the base unit; The first terminal and the third terminal, and the second terminal
And the fourth terminal are connected to each other during charging,
The charge state detection means is started at regular intervals by the control of the control unit, starts the first timer by connection of the charge state notification means, detects a charge state by overflow, and notifies the charge state. A cordless telephone configured to start the second timer when the means is not connected, and to detect a non-charged state when the second timer overflows.