JPH0731568B2 - Handy terminal - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a handy terminal device detachably provided in a data processing device, and in particular, it can be started from the data processing device side while being attached to the data processing device. Regarding handy terminals.

[Prior Art] For example, a product ordering system employed in a large-scale store is provided with a data processing device 1 composed of a host computer as shown in FIG. 6 and the handy terminal 2 shown in FIG. Then, when checking the stock quantity of each product displayed on the shelves in the sales floor or ordering the shortage products, the clerk carries the handy terminal 2 and goes around each shelf in the sales floor,
The product code, the number of stocks, or the number of orders is keyed in using the numeric keys arranged on the keyboard 3 of the handy terminal 2. When the key input operation of all the data is completed, the handy terminal 2 is attached to the data processing device 1 and the key input data is transmitted to the data processing device 1. The data processing device 1 executes data processing on data input from the handy terminal device 2 based on a key operation from the keyboard 4. Then, the data processing result is displayed on the CRT display tube 5 or the floppy disk drive (FDD) 6
Write on a floppy disk at.

Various data transmission methods are conceivable between the handy terminal 2 and the data processing device 1, but a wireless method such as optical communication or ultrasonic communication is adopted in consideration of operability at the time of attachment / detachment. Often.

Further, since the handy terminal 2 is portable, it has a built-in battery. Then, in the state of being attached to the data processing device 1, the drive voltage Vcc is supplied from the data processing device 1 via the cable 7 and the connection plug 8 in order to suppress the consumption of the battery. In addition, a handy terminal is also developed, which is configured to charge the battery with the driving voltage Vcc.

Such a handy terminal device 2 is configured as shown in FIG. 7, for example. That is, the CPU (central processing unit) 9 is connected to the ROM 11, the RAM 12, the keyboard 3, the display unit via the bus line 10.
14, parallel / serial conversion circuit 15 is connected.
The parallel / serial conversion circuit 15 includes an electro-optical converter 16 such as an LED for converting an electric signal into an optical signal and an opto-electric converter such as a phototransistor for converting an optical signal into an electric signal.
17 connected. Further, a reset signal from a reset circuit 19 that responds to a key operation of a power-on key 18 provided on the keyboard 3 is input to the reset terminal of the CPU 9.

In addition, the drive voltage Vcc from the battery 20 is applied to each electronic component.
Is supplied. The charging socket 21 into which the connection plug 8 is inserted is connected to the power supply terminal of each electronic component and is also connected to the battery 20 via the charging circuit 22 including a parallel circuit of a resistor and a diode.

Normally, in such a handy terminal device 2, a drive voltage Vcc is constantly applied to the CPU 9 from the battery 20. When the key operation such as data input is not performed, the CPU 9 detects that the power-off key 23 of the keyboard 3 is pressed,
Enter standby mode (standby) and display 14 or parallel /
By controlling each electronic component such as the serial exchange circuit 15 to minimize the current consumption in each electronic component, the battery
The program is configured to suppress 20 unnecessary power consumption.

Also, a handy terminal device has been developed which automatically shifts to the above-mentioned standby state when a preset specified time has elapsed from the last key operation end time on the keyboard 3. Therefore, even if a key operation is performed in this state, the handy terminal 2 does not operate normally.

Then, when inputting data to the handy terminal 2, the power-on key 18 of the keyboard 3 is pressed. Then, the reset circuit 19 operates to apply a reset signal to the CPU 9. As a result, the CPU 9 releases the standby state and shifts each electronic component member to the operable state. Then, it becomes possible to input data from the keyboard 3.

The data input by the keyboard 3 is temporarily stored in the RAM 12. Then, after the data input operation is completed, the handy terminal 2 is connected to the electro-optical converter 16 and the opto-electric converter 17
Is mounted so as to face the LED of the data processing device 1 and the optical transmitter / receiver 24 such as a phototransistor, data transmission by optical communication with the data processing device 1 becomes possible. Then, the data stored in the RAM 12 of the handy terminal device 2 is transmitted to the data processing device 1.

[Problems to be Solved by the Invention] However, the handy terminal 2 configured as described above still has the following problems. That is,
The data input operation position of the handy terminal 2 is in the sales floor, and the data processing device 1 is often installed in an office different from the sales floor. Therefore, since a considerable amount of time elapses from the data input to the handy terminal device 2 to the mounting of the handy terminal device 2 in the data processing device 1, the power cutoff key 23 of the keyboard 3 is pressed to prevent the battery 20 from being consumed. Press to put it in standby. Alternatively, since the specified time described above has elapsed, the standby state is automatically set.

Therefore, even when the handy terminal 2 is attached to the data processing device 1, even if the connection plug 8 is connected to the charging socket 21.
Even if you insert it, CPU9 is still in the standby state. Therefore, in the standby state, data cannot be transmitted by optical communication with the data processing device 1. Therefore, the power-on key 18 of the keypad 3 is pressed to apply a reset signal to the CPU 9,
It is necessary to put each electronic component into an operable state.

Therefore, when transmitting data from the handy terminal device 2 to the data processing device 1, it is necessary to turn on the power of the data processing device 1 and also operate the power-on key 18 of the attached handy terminal device 2. Therefore, the operator needs to turn on two power sources, which is very troublesome.

The present invention automatically generates a reset signal when a drive voltage is started to be supplied from a data processing device, thereby shifting each electronic component to an operable state without separately operating a power-on key. It is an object of the present invention to provide a handy terminal that can start data transmission with a data processing device by a simpler operation.

[Means for Solving Problems] The present invention is detachably attached to a data processing device, and a drive voltage is supplied from a battery to the data processing device in a detached state and data is input from a keyboard. In a handy terminal device that is connected to the data processing device and is supplied with a drive voltage from the data processing device and wirelessly transmits data to the data processing device, the data processing device is driven by the data processing device. A voltage detection circuit for detecting the start of voltage supply,
And a reset signal generating circuit for transmitting a reset signal in response to the voltage detection signal output from the voltage detection circuit.

[Operation] With the handy terminal device configured as described above, when the drive voltage is started to be supplied from the data processing device with the handy terminal device attached to the data processing device, the voltage detection circuit operates. To send a voltage detection signal. Then, a reset signal is sent from the reset signal generating circuit which has received the voltage detection. Then, each electronic component of the handy terminal automatically shifts to the operable state.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of the handy terminal device 31 of the embodiment. Conventional handy terminal 2 shown in FIG.
The same reference numerals are given to the same portions as. Also, like the conventional handy terminal 2 shown in FIG. 6, various function keys including a numeral key, a power-on key 18, a power-off key 23, etc. are arranged on the outer surface of the handy terminal 31. A keyboard 3, a display unit 14, and a charging plug 21 are provided.

In the handy terminal device 31 of the embodiment shown in FIG. 1, the CPU
(Central writing device) 9 via bus line 10 ROM11, RAM1
2, keyboard 3, display 14, parallel / serial conversion circuit 1
5 is connected. This parallel / serial conversion circuit 1
5 is an electro-optical converter such as an LED that converts an electric signal into an optical signal.
16 and an optoelectric converter 17 such as a phototransistor for converting an optical signal into an electric signal are connected. Further, a reset signal from a reset signal generation circuit 33 that responds to a key operation of a power-on key 18 provided on the keyboard 3 and a voltage detection signal output from the voltage detection circuit 32 is input to the reset terminal of the CPU 9. .

A drive voltage Vcc is supplied from the battery 20 to each electronic component. Further, the charging socket 21 into which the connection plug 8 connected to the data processing device 1 via the cable 7 is inserted is connected to the power supply terminal of each electronic component via the voltage detection circuit 32, and the resistor and the diode are connected. It is connected to the battery 20 via a charging circuit 22 formed of a parallel circuit with the.

The voltage detection circuit 32 and the reset signal generation circuit 33 are configured, for example, as shown in FIG. That is, the charging socket 21 is connected to the emitter of the pnp type transistor 35 via the backflow preventing diode 34. The collector of this transistor 35 is grounded via a collector resistor 36, and this collector resistor 36 has a capacitor 37 and a resistor 3
Differentiating circuit consisting of 8 and 39 is connected in parallel. Also,
A diode 40 having the illustrated polarity is connected to the capacitor 37.

The base of the transistor 35 is connected to the battery 20 via the charging circuit 22 and the collector of an npn-type transistor 42 via a resistor 41. The emitter of the transistor 42 is grounded, and the base is the resistor 38, 3
Connected to 9 connection points. Further, the collector of the transistor 42 is connected to the capacitor 43 forming the reset signal generating circuit 33.

FIG. 3 is a block diagram showing a data processing device 1 to which the handy terminal device 31 of the embodiment is attached. The CPU 45 is connected to the ROM 47, the RAM 48, the keyboard 4, the CRT display tube 5, the FDD 6, the parrel / serial conversion circuit 49, etc. via the bus line 46. The parallel / serial conversion circuit 49 includes an opto-electric converter that constitutes the optical transceiver 24 exposed on the front panel.
24a and electro-optical converter 24b are connected.

Further, since the data processing device 1 is of a stationary type, the drive voltage Vcc is supplied to each of the electronic components described above from the power supply circuit 51 connected to the commercial power supply via the power switch 50.
Then, when the power switch 50 is turned on, the power circuit 51 supplies the drive voltage Vcc to each of the electronic components and C
Apply the reset signal to the reset terminal of PU45. That is, the data processing apparatus 1 immediately shifts to the operable state when the power switch 50 is turned on.

When the power switch 50 is turned on, the power supply circuit 51 outputs a drive voltage to be supplied to the handy terminal device 31 to the connection plug 8 connected via the cable 7.

The operation of the handy terminal device 31 thus configured will be described.

First, when the handy terminal 31 is removed from the data processing device 1, the connection plug 8 is connected to the charging socket 21.
Is not inserted. Therefore, as shown in FIG. 2, the drive voltage Vcc is supplied from the battery 20 to each electronic component. Further, the capacitor 43 of the reset signal generating circuit 33 is charged to the voltage Vcc via the resistor 41. When the power-on key 18 of the keyboard 3 is pressed, the terminal of the capacitor 43 is grounded and the L-level reset signal is applied to the reset terminal of the CPU 9. As a result, the CPU 9 escapes from the standby state (standby) and shifts each electronic component member to the operable state. That is, the state of waiting for data input from the keyboard 3 is entered.

Power off key on keyboard 3 after data input operation is completed
When pressing 23, the CPU 9 shifts each electronic component to the standby state.

Next, the handy terminal 31 in the standby state is set to the data processing device 1
The operation in the case of being mounted on will be described with reference to the circuit diagram of FIG. 2 and the time chart of FIG. When the handy terminal device 31 is attached to the data processing device 1, the connection plug 8 is first inserted into the charging socket 21. When the power switch 50 of the data processing device 1 is turned on, a driving voltage is applied to the charging socket 21 of the handy terminal device 31 shown in FIG. As a result, since the drive voltage is applied to the emitter of the transistor 35 of the voltage detection circuit 32, the base current, that is, the charging current a starts to flow from the emitter terminal through the base terminal, and the battery 20 is charged through the charging circuit 22. Be started. When the base current a flows, the transistor 35 becomes conductive and the collector current flows through the collector resistor 36. Then, the collector potential b starts to rise. At the same time differentiating circuit capacitor 37
Starts charging, the potential at the connection point between the resistors 38 and 39, that is, the base potential c of the transistor 42 has a differential waveform as shown in FIG. Therefore, the transistor 42 is turned on for a very short time (ΔT) determined by the limited number of differentiating circuits including the capacitor 37 and the resistors 38 and 39, and the transistor 42 is turned on.
Collector potential d of Vcc drops from Vcc to 0V for a very short time ΔT. That is, this pulsed voltage signal is applied to the reset signal generation circuit 33 as the voltage detection signal e.
Then, this voltage detection signal e is used as a reset signal for CP.
Applied to U9. As a result, the CPU 9 escapes from the standby state (standby) and shifts each electronic component member to the operable state. That is, the data processing device 1 and the handy terminal
Data transmission by optical communication with 31 becomes possible.

Even if the battery 20 is fully charged and the charging current a becomes very small, the current flows as the base current of the transistor 35, so that the transistor 35 is sufficiently conductive due to its current amplification function. Therefore, the reset signal is not sent out.

In this way, even if the handy terminal 31 is attached to the data processing device 1 while each electronic component is in the standby state and the connection plug 8 is inserted into the charging socket 21, the power switch 50 of the data processing device 1 is turned on. When turned on, a reset signal is simultaneously generated in the data processing device 1 and the handy terminal device 31, and data transmission by optical communication can be immediately performed between the data processing device 1 and the handy terminal device 31.

Therefore, the operator must turn on the power switch
Since only 50 is required, the handling operation is further simplified. In particular, it is very effective when the handy terminal 31 is frequently attached to and detached from the data processing device 1.

Further, when the power switch 50 of the data processing device 1 is turned on in advance, the handy terminal 31 is mounted and the connection plug 8 is inserted into the charging socket 21, and at the same time, the respective electronic components move to the operable state. To do.

[Effects of the Invention] As described above, according to the handy terminal of the present invention,
Even if it is installed in the data processing device in the standby state, a reset signal is automatically generated in response to the start of drive voltage supply from the data processing device, the standby state is released, and each electronic component is made operable. Since it can be transferred, it is unnecessary to operate the power-on key before mounting to release the standby state, and data transmission to and from the data processing device can be started with a simpler operation. It is possible to provide a handy terminal device which is very effective when it is frequently attached to and removed from the processing device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a handy terminal according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a main part of the same embodiment,
FIG. 3 is a block diagram showing a data processor to which the embodiment is connected, FIG. 4 is a time chart showing the operation of the embodiment, FIG. 5 is an external view of the data processor, and FIG. 6 is a general view. FIG. 7 is an external view of such a handy terminal, and FIG. 7 is a block diagram showing a conventional handy terminal. 1 ... Data processing device, 3 ... Keyboard, 8 ... Connection plug, 9 ... CPU, 14 ... Display unit, 15 ... Parallel /
Serial conversion circuit, 18 ... power-on key, 20 ... battery, 21 ... charging socket, 23 ... power-off key, 31 ...
Handy terminal, 32 …… voltage detection circuit, 33 …… reset signal generation circuit, 35, 42 …… transistor.

Claims (1)

[Claims] 1. A data processing device, which is detachably attached to the data processing device. When the data processing device is in a detached state, a driving voltage is supplied from a battery to input data from a keyboard and each electronic structure. When a standby state in which each of the electronic components is made inoperable by minimizing the current consumption in the member is entered, the standby state is maintained until a reset signal is generated, and the electronic component is mounted on the data processing device. In some cases, a drive voltage is supplied from the data processing device, and when the electronic components are in a non-standby state in which the electronic components can operate, a handy terminal that performs wireless data transmission with the data processing device, The voltage detection circuit that detects the start of drive voltage supply from the device and the voltage detection signal output from this voltage detection circuit A reset signal generating circuit for generating the reset signal in response to the reset signal is provided, and when the data processing device is mounted in the standby state, the standby state is automatically set in response to the reset signal generated by the reset signal generating circuit. A handy terminal that can be released.