JPH08274704A - Portable radio equipment - Google Patents

Abstract

PURPOSE: To eliminate troublesome operations at the time of battery replacement and to securely place the equipment in normal operation after the battery is replaced. CONSTITUTION: The portable radio device 1, when deciding that the voltage of the battery 10 for the power source is lower than a specific voltage, makes a stand-by power source 39 to store information as decision data in a memory 30c to hold its storage contents, and alarm the drop of the voltage of the battery 10 on the basis of the decision data stored in the memory 30c. The portable radio equipment 1 is provided with a battery attaching/detaching detection switch 16 for detecting the attaching/detaching to/from batter holders of the battery 10 and a discrimination data erasing means 30 for erasing discrimination data stored in a memory 30c based on the detection signal of the battery attaching/detaching detection switch 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable wireless device such as a pager driven by a battery.

[0002]

2. Description of the Related Art As a portable radio apparatus of this type, a receiving section for receiving information, a voltage drop determining section for detecting a voltage drop of an air battery constituting a power source, and a determination result of the voltage drop determining section are stored. It is known that a memory and a warning unit that warns a decrease in the voltage of the air battery based on the determination result are known.

In this conventional portable radio apparatus, when the voltage of the air battery drops, it is not possible to guarantee the normal operation of all circuits including the receiving section. Therefore, the reference voltage, which is the limit voltage for ensuring the normal operation. The voltage drop determination unit determines whether or not the battery voltage has dropped. When the voltage drop determination unit determines that the battery voltage has dropped, the operation of the reception unit is stopped so that the warning unit uses the remaining capacity of the air battery for the warning that the battery should be replaced. As a result, the load on the air battery may be reduced, and the battery voltage may recover to a voltage higher than the reference voltage.
Therefore, when the voltage drop determining unit once determines that the voltage has dropped, the voltage drop data is stored in the memory as the voltage drop data, and the warning is continuously issued based on the voltage drop data until the battery is replaced.

On the other hand, since the memory stores received data and the like together with the voltage drop data, the memory is backed up so that the stored contents are not erased by battery replacement. Therefore, even if the battery is replaced, the warning by the warning unit is continued as long as the voltage drop data is stored in the memory. Therefore, when the battery is replaced, for example, the power switch is turned on / off / on (hereinafter referred to as "power reset") to erase the voltage drop data in the memory, thereby stopping the warning by the warning unit. ing.

[0005]

However, resetting the power supply is troublesome for the user, and the operation may be forgotten. In such a case, there is a problem in that the information cannot be received because the receiving unit is in a deactivated state.

[0006] Further, since the air battery obtains an electromotive force by utilizing oxygen in the air, when it is not used,
It is necessary to put a sticker on the positive electrode surface so as to close the air holes, but if it is not handled in this way, it will be consumed in a short period of time even if it is not used for a portable wireless device. Will end up. In such a case, even if the user intends to replace a new battery, the portable wireless device does not work. In addition, a battery having a high battery voltage other than the air battery may be erroneously mounted, and in such a case, it may cause a malfunction of the portable wireless device.

The present invention has been made in view of the above problems, and the complicated operation at the time of battery replacement can be eliminated, and the device can be reliably operated normally after battery replacement. The main purpose is to provide a portable wireless device.

[0008]

In order to achieve the above object,
The portable wireless device according to claim 1, when the voltage of the battery constituting the power supply is determined to be lower than a predetermined voltage, the backup power supply causes the memory that holds the stored contents to store the determination data as determination data, and the determination data is stored in the memory. In a portable wireless device that warns the battery voltage drop based on the discrimination data, a battery attachment / detachment detection switch that detects attachment / detachment of the battery to / from the battery holder, and a detection signal of the battery attachment / detachment detection switch,
And a discrimination data erasing means for erasing the discrimination data stored in the memory.

A portable radio device according to a second aspect is the portable radio device according to the first aspect, wherein the battery attachment / detachment detection switch also serves as a terminal electrode of the battery holder.

A portable radio device according to a third aspect is the portable radio device according to the first or second aspect, in which one contact of the battery attachment / detachment detection switch is pulled up to the positive potential of the standby power source to detect the battery attachment / detachment. The other contact of the switch is connected to the negative electrode of the battery, and when the battery is mounted on the battery holder, one contact is connected to the other contact, so that the change in the voltage value of the one contact becomes a detection signal. It is characterized by doing.

A portable radio device according to a fourth aspect is the portable radio device according to the first or second aspect, wherein one contact of the battery attachment / detachment detection switch is pulled down to a negative potential of the standby power source, and the battery attachment / detachment detection switch is pulled down. The other contact is connected to the positive potential line based on the battery, and when the battery is mounted on the battery holder, one contact is connected to the other contact to detect the voltage value change of the one contact. It is characterized by

According to a fifth aspect of the present invention, there is provided a portable radio apparatus in which a battery voltage detecting means for detecting a voltage of a battery constituting a power supply and a voltage for comparing the detected battery voltage with a predetermined voltage to determine a voltage drop of the battery. In the portable wireless device including the voltage drop determination unit and the warning unit that warns the battery voltage drop based on the determination result of the voltage drop determination unit, the voltage drop determination unit determines that the voltage of the battery is low. sometimes,
A battery load control means for preventing a recovery of the battery voltage to a predetermined voltage by adding a predetermined load to the battery is provided.

A portable radio device according to a sixth aspect is the portable radio device according to the fifth aspect, further comprising a receiving circuit for intermittent reception, and the battery load control means causes the battery to be continuously received by the receiving circuit. It is characterized by applying a predetermined load.

A portable radio apparatus according to a seventh aspect is the portable radio apparatus according to the sixth aspect, wherein the reception data is received by the reception circuit when the reception circuit is continuously receiving by the battery load control means. It is characterized by comprising a received data discarding means for discarding. It should be noted that the term “discard” here broadly includes the case where the received data is once read and then erased, the case where the received data is not accepted, and the like.

A portable radio apparatus according to claim 8 is the portable radio apparatus according to any one of claims 5 to 7,
The battery load control means is characterized by applying a predetermined load to the warning means by strengthening the warning.

According to another aspect of the present invention, there is provided a portable wireless device which compares a detected battery voltage and a reference voltage with a battery voltage detecting means for detecting a voltage of a battery constituting a power source and determines whether or not the battery can be used. It is characterized in that it is provided with a battery usable / unusable judging means and a battery unusable warning means for warning that the battery cannot be used based on the judgment result of the battery usable / unusable judging means.

[0017]

In the portable wireless device according to the first aspect, when it is determined that the voltage of the battery is lower than the predetermined voltage, the determination data is stored in the memory and a warning that the voltage of the battery has dropped is issued. It On the other hand, when the battery is replaced, the battery attachment / detachment detection switch detects removal and attachment of the battery, and the discrimination data erasing means erases the discrimination data stored in the memory based on the detection signal. As a result, the subsequent warning is stopped. In this way, when replacing the battery, it is not necessary to perform complicated operations such as resetting the power supply, and processing such as warnings executed based on the voltage drop determination data is automatically canceled. It is possible to ensure the normal operation of the device later.

In the portable radio device according to the second aspect, since the battery attachment / detachment detection switch is also used as the terminal electrode of the battery holder for holding the battery, a signal indicating that the battery has been removed is output at the same time as the battery removal, and a new signal is output. At the same time as installing the battery, the terminal electrode contacts the electrode of the battery and outputs a signal indicating that the battery is installed. As described above, since the battery attachment / detachment detection switch and the terminal electrode of the battery holder are also used, the detection signal can be output at the same time as the attachment / detachment of the battery, and the cost of the device is reduced.

In the portable radio device according to the present invention, since one contact of the battery attachment / detachment detection switch is pulled up to a positive potential and the other contact is connected to the negative electrode of the battery, the voltage of the contact is detected. Has a positive potential when the battery is removed and a negative potential when the battery is installed. in this way,
Since there is a large voltage difference between the detection voltage when the battery is attached and the time when the battery is removed, the detection signal reading error can be prevented and the attachment / detachment of the battery can be reliably detected.

In the portable radio apparatus according to the fourth aspect, one contact of the battery attachment / detachment detection switch is pulled down to the negative potential of the standby power source, and the other contact is connected to the positive potential line based on the battery. The voltage of the one contact has a negative potential when the battery is removed from the battery holder, and has a positive potential when the battery is mounted. As described above, since there is a large difference in the detected voltage between when the battery is attached and when the battery is removed, it is possible to prevent a detection signal reading error and reliably detect attachment / detachment of the battery.

In the portable radio apparatus according to the fifth aspect, when the battery voltage detected by the battery voltage detection means is lower than the predetermined voltage by the voltage drop determination means, the battery load control means causes the battery load control means to A predetermined load is applied to to prevent the battery voltage from recovering to a predetermined voltage. Therefore, thereafter, the voltage drop determining means determines that the battery voltage is lower than the predetermined voltage, and the warning means issues a warning based on the determination result. On the other hand, since the memory is unnecessary, the cost of the circuit can be reduced. Further, after the battery is replaced, the voltage drop determining means automatically determines that the voltage is normal, which eliminates the need for complicated operations such as power reset.

In the portable radio apparatus according to the sixth aspect, as in the portable radio apparatus according to the fifth aspect, the memory is not required and the continuous reception of the receiving section is used as a load, so that it is an extra load means. Since it is not necessary to provide various circuit parts,
Parts cost is reduced.

In the portable radio apparatus according to the seventh aspect, since the battery voltage is lowered when the receiving circuit is continuously receiving by the battery load control means, the operation of the receiving circuit is originally not guaranteed. . So, for example,
The reception data discarding unit discards the reception data received by the receiving circuit before displaying the erroneous reception data on the display unit. As a result, it is possible to prevent the situation where erroneous received data is transmitted to the user.

In the portable radio apparatus according to the eighth aspect, as in the portable radio apparatus according to the second aspect, the memory is unnecessary. Further, the battery load control means enhances the warning by the warning unit such as lengthening the vibration time of the vibrator and the blinking time of the LED, so that the battery is replaced early.

In the portable radio apparatus according to the ninth aspect, the battery availability determination means compares the battery voltage detected by the battery voltage detection means with the reference voltage to determine the availability of the battery. Then, based on the determination result of the battery usability determination means, the battery unusability warning means warns that the battery is unusable. Therefore, for example, when the battery voltage is lower than the reference voltage, a warning that the battery is a used battery is issued, and when the battery voltage is higher than the reference voltage, a warning that the battery is another type is issued. As a result, it is possible to prevent unexpected battery exhaustion and failure of the portable wireless device due to application of a voltage higher than the specified voltage.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable radio apparatus according to an embodiment of the present invention will be described in detail below with reference to the drawings.

First, the first embodiment will be described. FIG.
FIG. 3 shows a front view of the portable wireless device 1. This portable wireless device 1 is a so-called pager, has a predetermined ID number, and when its own ID number is transmitted by the POCSAG communication method,
Receives various data in the transmission data. Specifically, the portable wireless device 1 is always performing intermittent reception, and when a preamble signal is transmitted from the transmitter side (not shown), it detects this and switches to continuous reception. After that, the portable wireless device 1 receives a predetermined block signal among the plurality of block signals transmitted after the transmission of the preamble signal is completed. The block signal includes the ID number of the portable wireless device to be called and various data, and the portable wireless device 1 sends the transmitted ID number and
The ID number is compared with its own, and if they match, various data are received and the received various data are stored in the memory 3
0a (see FIG. 4). After that, the portable wireless device 1 displays various information based on various data on the liquid crystal panel (warning unit, battery availability warning unit) 4.

The portable wireless device 1 comprises a main body 2 and a band 3. The main body 2 is provided with a liquid crystal panel 4 for displaying various information and an LED 5 indicating that various data have been received in the central portion thereof, and the liquid crystal panel 4 is provided above them.
And a cover glass 6 for protecting and waterproofing the LED 5. A vibrator 34 (warning means, battery availability warning means, see FIG. 4) that vibrates when various data is received is housed in the left side portion 7 of the main body 2, and the vibrator 34 is provided below the liquid crystal panel 4. Switches 8 and 9 are provided for stopping the vibration of the device and adjusting the time of the clock displayed on the liquid crystal panel 4.

Next, the internal structure of the portable wireless device 1 will be described. FIG. 2 shows the main body 2 viewed from the back side with the back cover (not shown) removed. As shown in the figure, a hollow portion is formed in the center of the main body 2, and this hollow portion constitutes a battery housing portion 11 for housing the button type air battery 10 (see FIG. 3). Around the battery compartment 11,
Battery contact pieces 12a and 12b for holding the air battery 10 and contacting the positive electrode of the air battery 10 are provided. Further, a printed circuit board 14 for accommodating various electronic components 13 is disposed on the back side of the battery storage section 11 (the surface side of the main body 2), and a ground plate 15 is attached to the printed circuit board 14.

The ground plate 15 holds the air battery 10 together with the back cover, and the negative electrode 1 of the air battery 10 is held.
0a (see FIG. 3) is contacted to form the ground of the printed circuit board 14. The ground plate 15 is the battery contact piece 12
A battery holder is configured with a, 12b and the back cover.
The ground plate 15 has a flat ground plate body 15a and a plurality of lead terminals 15b, 15b ... (Only one is shown in the figure) integrally formed with the ground plate body 15a. There is. The ground plate 15 is a lead terminal 15
.. are soldered to the printed circuit board 14 so that the printed circuit board 14 is mounted above the printed circuit board 14 (on the front side in the figure). Further, the ground plate 15 has a spring-like battery attachment / detachment detection switch 16 formed integrally with the ground plate body 15a.

The battery attachment / detachment detection switch 16 projects toward the air battery 10 side from the flat surface of the earth plate body 15a as shown by the broken line in FIG. 3 when the air battery 10 is not housed in the battery housing portion 11. ing. On the other hand, when the air battery 10 is housed, the battery attachment / detachment detection switch 16 is pressed by the negative electrode 10a of the air battery 10 as shown by the solid line in FIG. It is pressed against the conductor portion 21 (see FIG. 2) formed on the printed board 14 by the printed pattern. The conductor portion 21 is connected to an input terminal of the controller 30 described later, and the controller 30 detects contact between the tip portion 16c of the battery attachment / detachment detection switch 16 and the conductor portion 21.

Next, referring to FIG. 4, the portable radio device 1
The electric circuit of will be described.

As shown in the figure, the portable wireless device 1 is
Slot antenna 31, receiving unit (reception circuit, predetermined load) 32, and control unit (discrimination data erasing unit, voltage drop determining unit, warning unit, battery load control unit, reception data discarding unit, battery availability warning unit) 30 , ROM 33, vibrator 34, booster circuit 35, diode 38, capacitor 39, resistor 40 and zener diode 50, and the liquid crystal panel 4, LED 5, switches 8 and 9, air battery 10 and battery attachment / detachment detection switch 1 described above.
6 is provided.

The receiving unit 32 is a single conversion type FM receiver, which normally receives intermittently, demodulates a radio signal incident from the antenna 31 at the time of reception, and controls the demodulated received data. Output to the unit 30. Further, the receiving unit 32 is in an operating state when the low level battery save signal is output from the control unit 30, but the receiving unit 32 performs the receiving operation when the high level battery save signal is input from the control unit 30. The current is stopped, and the current consumption becomes about microamperes as a leakage current. The receiving unit 32 may be a double conversion type FM receiver or a direct conversion type FM receiver.

The control section 30 is composed of a one-chip microcomputer, and has a memory 30a, A /
The D converter 30b and the register (memory) 30c are provided. The memory 30a temporarily stores various data and calculation results. The A / D converter 30b is connected to the positive electrode of the air battery 10 via a dedicated line 45, and converts the battery voltage of the air battery 10 into battery voltage data which is digital data. Also, the register 30c
Stores the battery voltage data and the like converted by the A / D converter 30.

Further, the battery attachment / detachment switch 16 described above is connected to the switch signal detection port of the control section 30 by the conductor section 21.
And is pulled up to the power supply voltage by a resistor (not shown). As a result, when the air battery 10 is not attached, the switch signal detection port of the controller 30 is at the power supply voltage potential, and when the air battery 10 is attached, the switch signal detection port is It becomes the ground potential of the battery 10. Therefore, since the voltage difference between when the air battery 10 is attached and when the air battery 10 is not attached is large, the control unit 30 can reliably determine attachment / detachment of the air battery 10 without erroneously determining the switch signal. . As a result, the control unit 30 can reliably execute the warning reset process described later when the air battery 10 is removed. The switch signal detection port of the control unit 30 is pulled down so that the positive electrode of the air battery 10 is in contact with the tip portion 16c of the battery attachment / detachment detection switch 16, and the earth plate body 15a is not a circuit earth but a positive potential. May be configured to be connected to. Even in this case, since there is a large voltage difference between when the air battery 10 is attached and when the air battery 10 is not attached, the switch signal is not erroneously determined.

When the receiving unit 32 outputs the received data, the control unit 30 outputs the ID number data of the received data and the R number.
The ID number data stored by the OM 33 is compared, and when they match, various data of the received data are read. Further, the control unit 30 stores the read various data in the memory 30a and outputs the display data corresponding to the various data to the liquid crystal panel 4 via the dedicated line 47 to display the various information. Further, at the same time, the control unit 30 respectively outputs a start signal and a lighting signal to the vibrator 34 and the LED 5 via the dedicated line 47 to intermittently operate the vibrator 34 and light the LED 5. As a result, the vibrator 3
The vibration of 4 transmits the reception of various data, and the lighting of the LED 5 causes the switches 8 and 9 to be switched even at night.
Is enabled, and switch operation such as stopping vibration of the vibrator 34 can be easily performed.

The control unit 30 also executes a battery voltage data transfer process, a voltage drop determination process, a voltage drop display process, a warning process and a warning reset process. Specifically, in the battery voltage data transfer process, the control unit 30 stores the battery voltage data converted by the A / D converter in the register 30.
Transfer to c and store it there. In the voltage drop determination process, the control unit 30 compares the battery voltage data stored in the register 30c with the first reference voltage data stored in the ROM 33, and determines that the value is smaller than the first reference voltage data. If so, the value "1" is set in the voltage drop flag of the register 30c. At the same time, the control unit 30
Compares the battery voltage data with the second reference voltage data,
When it is determined that the value is smaller than the second reference voltage data,
The value "1" is set in the warning flag of the register 30c.
In the voltage drop display process, the control unit 30 outputs the low cell display data to the liquid crystal panel 4 when the voltage drop flag has the value “1”, and displays “low cell” on the liquid crystal panel 4. In addition,
A symbol such as a battery mark may be displayed instead of the “low cell” display. In the warning process, when the warning flag has the value “1”, the control unit 30 outputs a start signal to the vibrator 34 to vibrate the liquid crystal panel 4,
The change cell display data is output and "change cell" is displayed on it. Note that the present invention is not limited to this, and, for example, a piezoelectric speaker may be made to sound "please replace the battery" or a buzzer may be made to sound.
In the warning reset process, when the battery voltage of the air battery 10 is determined to be a normal voltage after battery replacement, the control unit 30 sets the value “1” of the voltage drop flag and the warning flag of the register 30c to the value “0”. Reset.

The ROM 33 is connected to the control unit 30 via the bus line 46 and stores an operation program, ID number data, the above-mentioned first and second reference voltage data, and the like. In this case, the first reference voltage data is data representing the battery voltage when the portable wireless device 1 operates normally but the remaining capacity of the air battery 10 is decreasing, and the value “1. 25 (V) "is set. The second reference voltage data is data representing the battery voltage when the remaining capacity of the air battery 10 is almost exhausted and the battery should be replaced, and is set to the value “1.20 (V) (predetermined voltage)”. ing. The ROM 33 also stores third reference voltage data. This third reference voltage data serves as a reference voltage for determining whether or not an unusable battery is attached in the battery availability determining process executed by the control unit 30, and has a value of “1.5 (V)”. (Reference voltage) ”.

The booster circuit 35 is composed of a D / D converter, boosts the voltage of the air battery 10, and supplies the boosted power source to each circuit.

The diode 38 is a Schottky diode and prevents the electric charge charged in the capacitor 39 from flowing back to the booster circuit 35 side. The diode 38 is
By selecting a low forward voltage (Vf), the operating voltage of the control unit 30 is guaranteed. Conventionally, it is known that a base-grounded PNP transistor is provided between the booster circuit 35 and the capacitor 39 (Japanese Patent Laid-Open Publication No. 6-58242).
If the voltage drop between the collector and the emitter is similar to that of the diode 38, there is a problem that the base current is wasted and the battery runs out quickly when used in the portable wireless device 1. there were. On the other hand, in this embodiment, since the diode is used, there is no useless current, and since it is a two-terminal element and is smaller than the transistor, the wiring pattern of the printed circuit board can be easily designed, and The portable wireless device 1 can be downsized.

The capacitor 39 functions as a backup power source for the control unit 30, supplies power to the control unit 30 even when the air battery 10 is replaced, and erases various data stored in the memory 30a and the register 30c. To prevent The resistor 40 limits the inrush current that flows in from the booster circuit 35 when the capacitor 39 is not charged in the initial state.

The Zener diode 50 is the capacitor 3
The voltage based on the charge charged in 9 is stabilized to 3.3V. This ensures the withstand voltage of the capacitor 39 when a high voltage battery such as a lithium battery is accidentally attached instead of the air battery 10.

Next, regarding the operation of the portable radio apparatus 1,
With reference to FIG. 5, the voltage drop determination processing and the warning processing described above will be mainly described. In the figure,
The time on the horizontal axis of each of the upper and lower figures coincides with each other, and the period T1 is a period when the remaining capacity of the air battery is sufficiently high, the period T2 is a period when the remaining capacity is low, and the period T3 is almost empty. A period to be replaced is shown, and a period T4 is a period after the battery is replaced. In addition, the period T11,
T11 ... represents the period during which the receiving unit 32 is in the dormant state and the period T1.
2, T12 ... Shows the period during which the receiving unit 32 is in the receiving state, and the periods T13, T13.
It shows the period when each is operating.

First, the period T1 will be described. The control unit 30 controls the battery voltage of the air battery 10 input via the dedicated line 45 by the A / D converter 30b at predetermined time intervals (time t2). Convert to battery voltage data at time t1). Next, the control unit 30 executes the battery voltage data transfer process and the voltage drop determination process, respectively. At time t1 and time t2 in this case, since the battery voltage data is a value larger than the first reference voltage data, the control unit 30 determines that the capacity of the air battery is sufficiently large, and the value of the voltage drop flag of the register 30c is set to the value. Set "0".

Next, when time elapses and the period T2 is reached,
The remaining capacity of the air battery 10 decreases, and during the periods T12 and T13 in which the receiver 32 and the vibrator 34 operate, the voltage drop of the air battery 10 increases. At times t11 and t12 in this case, since the battery voltage data is a value larger than the first reference voltage data, the control unit 30 determines that the remaining capacity of the air battery 10 is large and sets the voltage drop flag to the value “0”. Set. On the other hand, at time t13, the battery voltage data is smaller than the first reference voltage data, so the control unit 30 determines that the remaining capacity of the air battery is small, and sets the value “1” to the voltage drop flag. . The control unit 30
When the value "1" is set in the voltage drop flag, the voltage drop display process is executed.

Next, in the period T3, the remaining capacity of the air battery 10 almost disappears, and the voltage drop of the air battery 10 in the periods T12 and T13 becomes very large. At time t22 in this case, similarly to time t13, it is determined that the remaining capacity of the air battery 10 is small. However, in this case, since the value "1" has already been set in the voltage drop flag,
It will not be rewritten. The value "1" written in the low voltage flag is set only by the warning reset process.
The value is rewritten to "0".

On the other hand, at the time t23, since the battery voltage data is smaller than the second reference voltage data, the control unit 30
Determines that the remaining capacity of the air battery 10 is almost zero, and sets the value "1" to the warning flag of the register 30c. In addition,
The warning flag has a value of "1", like the brownout flag.
Is set, the value is reset to the value "0" only by the warning reset process. Warning flag value "1"
When is set, the control unit 30 repeatedly executes the warning process at every predetermined time. Further, when the warning flag is set to the value “1”, the control unit 30 outputs a battery save signal to the reception unit 32 and suspends the reception unit 30.

Next, when the battery is replaced at time t31 in the period T4, the tip portion 16c of the battery attachment / detachment detection switch 16 is separated from the conductor portion 21, and the voltage of the switch signal detection port of the control unit 30 becomes high level. . In this case, the control unit 30 determines that the air battery 10 has been removed, and stops the other processes except the clock process for counting the time. After that, when the air battery 10 is replaced at time t32, the tip portion 16c of the battery attachment / detachment switch 16 comes into contact with the conductor portion 21, and the voltage of the switch signal detection port of the control unit 30 becomes low level. In this case, the control unit 30
Determines that the air battery 10 has been replaced, and resets the voltage drop flag and the warning flag to the value "0".

In the period T4 after the battery replacement, the control unit 30
In the voltage drop determination process at times t41, t42, t43, and t44, since the battery voltage data is larger than the first reference voltage data, it is determined that the remaining capacity of the air battery 10 is sufficient, and the voltage drop flag is set. Set the value "0". After that, the control unit 30 continuously executes the battery voltage data transfer process and the voltage drop determination process.

The control unit 30 also executes the battery usability judgment process when the voltage drop judgment process is executed and when it is judged that the battery has been replaced. Specifically, in this process, when the battery voltage data has a value larger than the third reference voltage data, for example, when a lithium battery is attached, the control unit 30 sets the battery voltage data to about 2.8V. become. In this case, it is determined that another type of battery has been erroneously attached, the vibrator 34 is vibrated, and the liquid crystal panel 4 displays, for example, "This battery cannot be used." This alerts the user to replace the battery. When the used air battery 10 is attached, the battery voltage data becomes a value smaller than the first and second reference voltage data (for example, a voltage of about 1.2V or less). Therefore, also in this case, in order to prevent an unexpected battery exhaustion, the battery replacement is warned in the same manner as in the case where a battery of another type is accidentally attached. In this case, a display such as "used battery" may be displayed to be distinguishable from the case where another type of battery is attached.

When the battery is replaced with a new one, a current forcibly flows through the capacitor 39 via the booster circuit 37, the diode 38 and the resistor 40, the voltage of the capacitor 39 is initially low, and then the exponent It becomes higher functionally. Further, for example, when a lithium battery is mistakenly installed, the battery voltage is as high as about 2.8 V, so that the charging speed is fast, but the voltage of the capacitor 39 is initially low. Therefore, after detecting the battery replacement, the resistance 40
And by waiting for the constant time of the capacitor 39 and comparing the battery voltage data with the third reference voltage data,
It is possible to reliably determine that another type of battery or the used air battery 10 has been installed.

As described above, in the first embodiment, the control unit 3
0 indicates a battery attaching / detaching switch 1 when the air battery 10 is replaced.
When the tip portion 16c of 6 is separated from the lead wire portion 21, it is determined that the air battery 10 has been removed, and the tip portion 16c is set to the lead wire portion 2
When 1 is touched, it is determined that a new air battery has been replaced, and the voltage drop flag and the warning flag are reset. In this way, when replacing the battery, it is not necessary to perform a complicated operation such as power reset, and the warning process executed based on the data (value "1") set in the warning flag is automatically canceled. To be done. As a result, the normal operation of the portable wireless device 1 after the battery replacement is surely guaranteed. Furthermore, when the power switch is turned on, it is usually necessary to generate a beep sound to notify the start-up of the device, but since it is not necessary to reset the power supply, it is possible to eliminate the need for annoying beep sound. it can. If another type of battery or a used air battery 10 is mistakenly attached during battery replacement, a battery replacement warning will be issued, which may lead to unexpectedly early battery exhaustion or a specified voltage It is possible to prevent a failure of the portable wireless device 1 due to the application of a high voltage.

The present invention is not limited to the configuration of the first embodiment, and the battery holder and the battery attachment / detachment detection switch can be modified appropriately within the scope of the present invention.

For example, as shown in FIG. 7, the location for detecting the battery voltage data may be on the cathode side of the diode 38. In this case, the battery voltage is booster circuit 3
Since the voltage is boosted approximately twice by 5, the first reference voltage data, the second reference voltage data, and the third reference voltage data are
The value is set to “2.35 (V)”, the value is set to “2.3 (V)”, and the value is set to “3.0 (v)”. Further, when the voltage is detected at this portion, the voltage is held to some extent by the capacitor 39, so that the voltage of the air battery 10 is changed to the vibrator 3
4 etc. becomes a heavy load at the time of startup, and the voltage recovery is delayed when returning to the next light load, and the value becomes smaller than the second reference voltage data although the original battery capacity is sufficient. Can be prevented.

Further, as shown in FIG. 8, the battery voltage data is detected at the cathode side of the diode 38, and instead of the battery attachment / detachment detection switch 16, the anode side of the diode 38 is connected to the conductor portion 21. You can also In this case, regarding the voltage of the lead wire portion 21, when the air battery 21 is removed, the voltage from the booster circuit 35 becomes the reference potential (the negative electrode potential of the capacitor 39 or the ground potential), but a new air battery 10 is attached. At this time, since the boosted voltage by the booster circuit 35 is applied, the control unit 30
Can determine that a new air battery 10 has been replaced. Therefore, the warning can be reset based on this voltage change. Further, even in this case, the battery availability warning process can be executed by detecting the anode voltage of the diode 38.

Further, in the first embodiment, even when the control unit 30 activates the vibrator 34, the liquid crystal panel 4, the LED 5 and the like at the times t13 and t23,
Although the voltage drop flag and the warning flag are set by detecting the battery voltage data, if the operation of the vibrator 34 or the like is stopped, the load becomes light and the battery voltage rises.
Therefore, in order to effectively use up the remaining capacity of the air battery 10 without waste, when the vibrator 34 or the like is started, both flags are not set and the voltage drop determination process is performed again after a certain time has elapsed after the operation is stopped. Alternatively, both flags may be set only when the voltage is reduced. Furthermore, when the vibrator 34 or the like is activated, the voltage drop determination process may not be executed.

Next, the second embodiment will be described.

The second embodiment is the first in two points described below.
Different from the embodiment. That is, one is that the battery attaching / detaching switch 16 is not used. In addition, the other one is that when the determination unit 30 determines that the battery voltage data is a value smaller than the second reference voltage data, the determination unit 30 executes a load control process for increasing the load of the air battery 10 and reduces the voltage. The contents of the voltage drop flag and the warning flag are rewritten each time the determination process is performed.

FIG. 6 shows the battery voltage of the air battery 10 when the remaining capacity is almost exhausted. As shown in the figure, the control unit 30 outputs a high-level battery save signal to the receiving unit 32 during the period T21 in which the receiving unit 32 should stop receiving. At time t51 when the battery voltage data transfer process and the voltage drop determination process at this time are executed, the control unit 30 determines that the battery voltage has not dropped because the battery voltage data is a value larger than the first reference voltage data. To do. When the time when the receiving unit 32 should receive (period T22) comes, the control unit 30 stops the output of the high-level battery save signal and puts the receiving unit 32 into the receiving state. At time t52 in this state, the battery voltage data is a value smaller than the first reference voltage data, so the control unit 30 determines that the remaining capacity of the air battery 10 is small, and sets the voltage drop flag to the value “1”. Then, the voltage drop display process described above is executed.

Then, the control unit 30 suspends the receiving unit 32 by outputting a high level battery save signal in the period T23 in which the receiving unit 32 should suspend the reception. In the period T23, the control unit 30 controls the time t53,
At t54, the battery voltage data transfer process and the voltage drop determination process are executed. At time t53, the voltage drop flag is set to the value “1”, and at time t54, the voltage drop flag is set to the value “0”.

Thereafter, during the period T24 in which the vibrator 34 or the like is activated, the voltage drop of the air battery 10 is very large, and at time t55, the control unit 30 causes the battery voltage data to be the first reference voltage data and the second reference voltage. Since the value is smaller than the data, it is determined that there is almost no remaining capacity of the air battery 10. Then, the control unit 30 sets the value "1" to the voltage drop flag and the warning flag, respectively, and intermittently executes the voltage drop display processing and the warning processing. At the same time, the control unit 30 stops the output of the high-level battery save signal and puts the receiving unit 30 into the continuous operation state. In this state, even during the period T25 in which the period T24 has elapsed and the receiving unit 30 is continuously operating, the air battery 10
Since there is almost no remaining capacity, the voltage recovery of the air battery 10 is further delayed, and the battery voltage data does not become a value larger than the second reference voltage data. Therefore, the time t56, t57, t
At 58 and t59, since the battery voltage data is a value smaller than the second reference voltage data, the control unit 30 rewrites the warning flag to the value “1” each time and continuously executes the voltage drop display process. , The warning process is intermittently executed (period T26). In this case, the receiving unit 30
The received data is input because of the continuous operation, but the reliability of the data output from the reception unit 30 is reduced because the battery voltage of the air battery 10 is decreased. Therefore, the received data may have an error. Therefore, the control unit 30 discards the received data without storing it in the memory 30a and displaying it on the liquid crystal panel 4. As a result, it is possible to prevent erroneous reception data from being transmitted to the user. In addition,
The control unit 30 may not accept the received data.

Next, when the air battery 10 is removed at time t61 and replaced with a new battery at time t62, at the time t63 for executing the subsequent voltage drop determination processing, the control unit 30 determines that the battery voltage data is Since the value is larger than the first reference voltage data and the second reference voltage data,
It is determined that the remaining capacity of the air battery 10 is sufficient, and the voltage drop flag and the warning flag are reset to the value “0”. At the same time, the control unit 30 outputs a high-level battery save signal to the receiving unit 32 to put the receiving unit 32 in the intermittent receiving state. After this, the control unit 30
Continues the battery voltage data transfer process and the voltage drop determination process at times t64, 65 ...

As described above, in the second embodiment, the control unit 3
When 0 is determined that the battery voltage data is smaller than the second reference voltage data, the receiving unit 32 is continuously operated, so that the air battery 10 is delayed more than the second reference voltage as a result of delaying the voltage recovery. Maintain a reduced state. As a result, the control unit 30 always performs the voltage drop determination process
It is determined that the remaining capacity of the air battery 10 is almost zero, and the warning process is intermittently executed. In this way, when the remaining capacity of the air battery 10 is almost exhausted, the warning to replace the battery is continuously issued. On the other hand, during the voltage drop determination process, the voltage drop flag and the warning flag are rewritten each time, so after the battery replacement, the control unit 30 controls the air battery 1
It is automatically determined that the remaining capacity of 0 is sufficient. For this reason,
No need for complicated operations such as power reset.

In the second embodiment, an example in which the receiver 32 is continuously received when it is determined that the remaining capacity of the air battery 10 is almost zero has been described. However, the present invention is not limited to this, and the vibrator is not limited thereto. 34 vibration time extension, vibration cycle reduction, new warning by buzzer, and L
The warning process may be strengthened, such as blinking by the ED 5. In this case, by strengthening the warning, the battery can be replaced early. Further, the air battery 10 may be subjected to a load due to sound generation or resistance connection.

Further, in the second embodiment, the register 30c
Although the voltage drop flag and the warning flag are used, the present invention is not limited to this, and the warning process may be performed every time the voltage drop determination process is performed. In this case, the register 30c as a memory becomes unnecessary, and the component cost can be reduced.

[0067]

As described above, according to the portable radio apparatus of the first aspect, the battery attachment / detachment detection switch detects the exchange of the battery when the battery is exchanged, and the memory is cleared based on this. , It eliminates the need to perform complicated operations such as power reset, and automatically cancels warnings and other processes that are executed based on the voltage drop determination data, ensuring the normal operation of the device after battery replacement. Can be guaranteed.

According to the portable radio device of the second aspect,
Since the battery attachment / detachment detection switch also serves as the terminal electrode of the battery holder, it is possible to output a detection signal at the same time as the attachment / detachment of the battery and reduce the cost of the device.

In the portable wireless device according to claims 3 and 4, one contact of the battery attachment / detachment detection switch is pulled up to a positive potential or pulled down to a negative potential, and the other contact is a negative electrode of the battery or a positive electrode based on the battery. Since the battery is connected to the potential line, there is a large voltage difference between the detection voltage when the battery is attached and the time when the battery is removed, so that a reading error of the detection signal can be prevented and the attachment / detachment of the battery can be reliably detected.

According to the portable radio device of the present invention, the battery load control means applies a predetermined load to the battery when the voltage drop determining means determines that the voltage of the battery is low. Since the battery voltage is prevented from recovering to a predetermined voltage, a memory for storing the determination result is unnecessary,
The cost of the circuit can be reduced. Further, after the battery is replaced, the voltage drop determining means automatically determines that the voltage is normal, which eliminates the need for complicated operations such as power reset.

According to the portable radio apparatus of the sixth and seventh aspects, since the continuous reception of the receiving section is used as a load, it is not necessary to provide an extra circuit component as a load means, and the component cost is reduced.

Further, according to the portable radio apparatus of the seventh aspect, the reception data discarding means discards the reception data received by the receiving circuit, and as a result, erroneous reception data is transmitted to the user. Can be prevented.

According to the portable radio device of the eighth aspect,
The battery load control means determines whether the vibration time of the vibrator or LED
The battery is replaced at an early stage in order to strengthen the warning by the warning part such as increasing the blinking time of.

According to the portable radio apparatus of the ninth aspect,
Since the battery unusable warning means warns that the battery cannot be used based on the result of the determination by the battery usable / unusable determination means, it is caused by unexpected battery exhaustion or application of a voltage higher than the specified voltage. Failure of the wireless device can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a portable wireless device according to an embodiment.

FIG. 2 is a rear view of the portable wireless device according to the first embodiment.

FIG. 3 is a partially enlarged side view of the battery attachment / detachment detection switch according to the first embodiment.

FIG. 4 is a block diagram of a portable wireless device according to the first embodiment.

FIG. 5 is a diagram for explaining a voltage drop determination process and a warning reset process of the control unit according to the first embodiment.

FIG. 6 is a diagram for explaining a voltage drop determination process and a load control process of a control unit according to the second example.

FIG. 7 is a block diagram showing another configuration of the portable wireless device according to the first embodiment.

FIG. 8 is a block diagram showing still another configuration of the portable wireless device according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable radio device 4 Liquid crystal panel 10 Air battery 12a Battery contact piece 12b Battery contact piece 15 Ground plate 16 Battery attaching / detaching switch 30 Control part 30c Register 32 Receiving part 34 Vibrator 39 Capacitor

Claims (9)

[Claims] 1. When it is determined that the voltage of a battery constituting a power source is lower than a predetermined voltage, the backup power source stores the stored content as determination data in a memory, and based on the determination data stored in the memory. In a portable wireless device that warns of the voltage drop of the battery by means of a battery attachment / detachment detection switch for detecting attachment / detachment of the battery to / from the battery holder, and a memory signal stored in the memory based on a detection signal of the battery attachment / detachment detection switch. A portable wireless device comprising: a discrimination data erasing unit that erases the discrimination data. 2. The portable wireless device according to claim 1, wherein the battery attachment / detachment detection switch also serves as a terminal electrode of the battery holder. 3. One contact of the battery attachment / detachment detection switch is pulled up to a positive potential of the standby power source, and the other contact of the battery attachment / detachment detection switch is connected to a negative electrode of the battery to connect the battery. 3. When the battery holder is mounted, the one contact is connected to the other contact to change the voltage value of the one contact as the detection signal. Portable wireless device. 4. One contact of the battery attachment / detachment detection switch is pulled down to a negative potential of the standby power source, and another contact of the battery attachment / detachment detection switch is connected to a positive potential line based on the battery. When the battery is mounted on the battery holder, the change of the voltage value of the one contact is used as the detection signal by connecting the one contact to the other contact. A portable wireless device as described. 5. A battery voltage detecting means for detecting a voltage of a battery constituting a power supply, a voltage drop determining means for comparing the detected battery voltage with a predetermined voltage to determine a voltage drop of the battery, and the voltage. Based on the determination result of the deterioration determination means,
In a portable wireless device provided with a warning unit for warning the voltage drop of the battery, when the voltage drop determination unit determines that the voltage of the battery is low, a predetermined load is applied to the battery, and A portable radio device, comprising battery load control means for preventing recovery of a battery voltage to the predetermined voltage. 6. The mobile phone according to claim 5, further comprising a receiving circuit for intermittent reception, wherein the battery load control means applies the predetermined load to the battery by continuously receiving the receiving circuit. Wireless device. 7. The reception data discarding means for discarding the reception data received by the receiving circuit when the reception section is continuously receiving the data by the battery load control means. 6. The portable wireless device described in 6. 8. The portable device according to claim 5, wherein the battery load control means applies the predetermined load to the warning means by strengthening the warning. Wireless device. 9. Battery voltage detection means for detecting a voltage of a battery constituting a power source, and battery availability determination means for comparing the detected battery voltage with a reference voltage to determine availability of the battery. A portable wireless device comprising: a battery unusable warning unit that warns that the battery is unusable based on the determination result of the battery usability determination unit.