JPH03164818A - Portable data processor - Google Patents

Abstract

PURPOSE:To surely perform the data save processing by providing a data save processing means which performs the data save processing at the time of detecting the start of unloading of a battery cassette. CONSTITUTION:A battery cassette 2 and electrodes 3a and 3b are provided, and these electrodes are provided in the battery cassette storage part of a device main body 1 and are slided for a fixed length to keep a battery connected at the time of loading/unloading of the battery cassette 2 to/from the device main body 1. A battery cassette loading/unloading detecting means 8 detects loading/unloading of the battery cassette 2, and the data save processing means performs the data save processing when the start of unloading of the battery cassette 2 is detected by a loading/unloading detecting means 8 of the battery cassette 2. Though the unloading operation of the battery cassette 2 is continued during the data save processing, the battery cassette 2 and electrodes 3a and 3b provided in the battery cassette storage part of the device main body 1 are slided by only the fixed length up to the end of the unloading of the battery cassette 2 and are kept electrically connected. Thus, the sufficient data save processing time is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Al Industrial Field of Application) The present invention relates to a portable data processing device that uses a battery as a power source to collect data and transmit data to a host computer.

Conventional technology Devices that read barcodes printed on products or labels affixed to products on-site at product display shelves, warehouses, etc., and on-site keying of power H1s, gas meters, etc. installed in each house. As a device that collects data manually,
Generally, a portable data processing device that can be connected to a host computer is used.

Portable data processing devices used for such purposes are
To eliminate the hassle of battery replacement, a secondary battery is used as a power source, and when carried, the device is operated by this secondary battery, and the device is operated for a long time when charging the secondary battery or when connected to a host computer. In case A
I am using it with a C adapter/charger connected. Therefore, under normal usage conditions, battery replacement is not necessary, but since the capacity of secondary batteries decreases depending on the number of times they are charged and discharged, etc., they are replaced when the capacity has decreased to a certain extent.

There are two ways to connect the secondary battery to the device body: the secondary battery is built into the case of the device body and connected to a circuit board etc. with a connector, and the secondary battery is shaped into a cassette to form a battery cassette. However, there is one in which two battery cassettes can be removed from the outside of the 'AW body. The former method requires removing the cabinet of the device when replacing the battery, which is a complicated process. Although the latter method does not have these disadvantages, there is a risk that the battery cassette may be removed due to misdirection of the device's operation r', resulting in the device being dropped, or due to inadvertent removal of the battery cassette.

If the battery cassette is removed while the device is in operation, not only will the series of processes in progress not be completed, but the CPU may malfunction due to a drop in power supply voltage, which may destroy data. Therefore, in the past, a locking mechanism was installed to prevent the battery cassette from being removed carelessly, or a large-capacity device was installed that saved the data when it detected that the battery had been removed, and held the power supply voltage for the time required for the saving process. They also installed capacitors.

An example of the configuration of a conventional device in which a locking mechanism is provided in a battery power cellar is shown in FIG. 13. In the figure, 1 is the main body of a portable data processing device, and the figure shows the bottom surface thereof.

2 is a battery cassette, and two electrodes 4a, 4b and an engagement piece 6 are provided. The battery cassette storage part of the device main body 1 has electrodes 3a, 3 in contact with the electrodes of the battery cassette.
b and a means (not shown) that engage with the engaging piece 6 of the battery cassette are provided. Reference numeral 5 denotes an operation section for releasing the locking mechanism.

(C1 Problem to be solved by the inventionHowever, in a portable data processing device in which a locking mechanism is provided on the battery cassette as shown in FIG. 13,
After detecting that the battery cassette 2 is removed by operating the operating unit 5, the battery cassette 2 is electrically disconnected only by moving the distance X shown in the figure. For this reason, if the battery cassette is removed quickly, it will actually be electrically isolated a short time after the start of battery cassette removal is detected, so unless a large capacity capacitor is installed, sufficient evacuation will not be possible. It was not possible to secure processing time.

An object of the present invention is to provide a portable data processing device that can secure sufficient data backup processing time even if the battery cassette is removed during operation of the device, without using the aforementioned large-capacity capacitor. The purpose is to donate money.

(d) Means for Solving the Problems The portable data processing device according to claim 1 of the present invention has an electrode that slides a certain distance to maintain the connected state of the battery when the battery cassette is attached to and detached from the device body. A battery cassette attachment/detachment detection means is provided in the battery cassette storage section of the device body and detects attachment/detachment of the battery cassette, and when the start of battery cassette removal is detected by the battery cassette attachment/detachment detection means, data is saved. The present invention is characterized in that a data saving processing means is provided.

The portable data processing device according to claim 2 is the portable data processing device according to claim 1, in which when the battery cassette is removed, the battery cassette is temporarily removed from the device while the battery cassette is sliding a certain distance. It is characterized by providing a temporary locking means for locking to the main body.

Further, the portable data processing device according to claim 3 includes a replaceable main battery used as a main power source for the entire device, and a sub battery that backs up the memory when the main power is turned off and supplies power to the control section. - Provided with a main battery insertion/removal detection means for detecting attachment/removal of the main battery, and a data evacuation processing means for performing data evacuation processing using the auxiliary battery as a power source and then turning off the power when removal of the main battery is detected. It is characterized by

Furthermore, in the portable data processing device according to claim 4, in the portable data processing device according to claim 3, the control section includes a microprocessor, and when the data saving processing means performs data saving processing using the sub battery as a power source, The present invention is characterized by providing a clock frequency switching means for lowering the clock frequency of the microprocessor.

(81 Effect) In the portable data processing device according to claim 1 of the present invention, the battery cassette and the battery cassette storage portion of the device main body are slid a certain distance when the battery cassette is attached to and removed from the device main body, and the battery is connected to the device. Further, the battery power cent attachment/detachment detection means detects attachment/detachment of the battery cassette, and the data evacuation processing means detects when the battery cassette attachment/detachment detection means detects the start of battery cassette removal. The data is saved.During this data saving process, the battery cassette removal operation continues for a certain distance until the battery cassette is completely removed.
The electrodes provided in the battery cassette and the battery cassette storage portion of the main body of the device are slid together to maintain electrical connection S<. Therefore, sufficient data saving processing time can be secured.

In the portable data processing device according to claim 2, the portable data processing device according to claim 1 further includes the battery cassette being temporarily locked when the battery cassette is removed from the battery cassette storage portion of the device main body. Therefore, even if the sliding distance between the battery cassette and the electrodes provided in the battery power storage section is relatively short, sufficient time must be ensured from when the battery cassette begins to be removed until it is actually electrically separated. In the portable data processing device according to claim 3, a replaceable main battery such as the battery cassette is used as the main power source for the entire device, and when the main power is turned off, the built-in auxiliary battery powers the memory. Performs backup and supplies power to the control unit.

The main battery attachment/detachment detection means detects the attachment/detachment state of the main battery, and when the removal of the main battery is detected, the data save processing means uses the auxiliary battery as a power source to perform data save processing, and then turns off the power. The above-mentioned sub-battery is originally a battery conventionally used for memory backup, and by using the sub-battery as 1aiX of the control unit when the main battery is not available, it is possible to secure the power supply voltage required for data saving processing. . Moreover, since the power is turned off after the data saving process, the average power that the sub-battery must supply is small, and a conventional small-capacity sub-battery can be used as is.

In the portable data processing device according to claim 4, in the portable data processing device according to claim 3, the control section includes a microprocessor, and the clock frequency switching means is configured to perform data saving processing using the sub battery as a power source. , lower the microprocessor's clock frequency.

Normally, the auxiliary battery used for memory bank-up is diode-OR connected to the main battery so that power is supplied from the main battery when the main battery is present, and its voltage is lower than the voltage of the main battery. It is set. Therefore, when the sub-battery is used as a power source, the power supply voltage of the microprocessor is lower than normal. Therefore, by lowering the clock frequency of the microprocessor as in the above configuration, the microprocessor can operate within the operating margin, and data saving processing can be performed normally.

(f) Embodiment FIGS. 1 and 2 show a perspective view and a plan view of a portable data processing device according to a first embodiment of the present invention, which corresponds to the device according to claim 1 of the present invention.

In both figures, l is the main body of the device, and the figure shows the appearance of the bottom surface thereof. 2 is a battery cassette, and FIG. 1 shows the battery cassette 2 removed from the main body 1 of the apparatus. On the side of the battery cassette 2, electrodes 4a and 4b for supplying battery voltage are provided on both sides, and an electrode 9 for providing a potential on the ground potential side is provided at a position opposite to the electrode 8 on the main body side. Further, grooves 1) are provided on both sides of the battery cassette 20, and two electrodes 4a and 4b are exposed at the bottom thereof. The battery cassette storage portion of the main body of the device is provided with electrodes 3a and 3b that receive the power supply voltage of the battery, and an electrode 8 that detects whether the battery cassette is attached or removed. Further, the battery cassette storage portion of the main body of the device is further provided with a guide protrusion 10 that engages with the hole 7 into which the retaining piece 6 of the battery power separator 1- is inserted and the groove 1) provided on both sides of the battery cassette. ing.

Next, a circuit diagram of the main parts of the device is shown in FIG. In FIG. 3, 17 is a CPU consisting of a microprocessor that controls the entire device, and 18 is a peripheral circuit including a memory and an interrupt control circuit, which are composed of C-MO3 circuits. Further, 16 is an iode. Ql is A, which will be described later.
This transistor is controlled by the output of the ND gate 21, and when it is in the ON state, the power supply voltage of the main battery 15 is supplied to the CPU 17 and peripheral circuits 18. The resistor R1 is a pull-up resistor for the INI terminal of the CPU. , CPU IN when battery cassette 2 is not installed.
The I terminal is at the "lf" level, and when the battery cassette 2 is attached, it is at the "L" level. Resistor R2 is a pull-down resistor for the human input signal of inverter 2o, and CP
When the 0UT1 terminal of U is not at the "H" level, the input to the inverter 20 is at the "HI" level. In addition, 19 is a one-shot circuit, and its input terminal has a pull-up resistor R3.
and Ttij70N switches are connected. When this ON switch is operated, the one-shot circuit 19
The input terminal IN becomes “L” level (valid) and the terminal O
The UT outputs a 1L" level signal for a certain period of time. Therefore, by operating the power ON switch, A N
The output of the D gate 21 becomes "L" level, the transistor Ql becomes conductive, and the power supply voltage Vcc is supplied to the CPU 17. As described later, this causes the CI'U 17
starts operating and sets 0UTI to "I(" level) to keep transistor Ql in the ON state.

Next, the timing of timer interrupt processing, its processing procedure, and the processing procedure after power is turned on are shown in FIGS. 4, 5, and 6.

The peripheral circuit 18 shown in FIG. 3 is provided with a timer interrupt circuit that interrupts the CPU 7 at regular intervals, and as shown in FIG. An interrupt is generated, and the battery cassette detection and data saving processing are performed by the timer interrupt processing.

As shown in Figure 5, in the timer interrupt processing, first the signal S
N S * state, that is, the CPU I shown in Figure 3.
Read the level of the NI terminal (nl).

If this signal is at the 1L" level, it is assumed that the battery cassette is installed and the interrupt processing is immediately terminated. However, if the signal is at the "1)" level, the battery cassette has been removed (removal is not possible). The contents of each register in the CPU and various data necessary for continuation of the program are saved to a predetermined area of RA?v1 (n2).Then, the save process is saved to remember that the save process has been performed. The flag (bit in a predetermined area of RAM) is set (n3), and then, by setting the terminal 0UTI of the CPU shown in FIG. to turn off the power supply Vcc to the CPU (n4)
.

The period T in which the timer interrupt processing shown above is performed is repeated in a short period of time, for example every several tens of m5ec, so
In practice, the evacuation process is started immediately after the removal of the battery cassette is started.

Now, after that, the battery cassette is installed again and the power is turned on.
When the N switch is operated, as shown in FIG. 3, the one-shot circuit 19 and the AND gate 21 turn on the transistor Q1, supplying the power supply voltage Vcc to the CPU. This resets the CPU circuitry, and the circuit executes the program from a predetermined start address. FIG. 6 shows the processing procedure at that time. First, while the output of the one-shot circuit 19 shown in FIG. 3 is at the "L" level, the CPU output 0UTI is set to the "I-I" level to keep the transistor Ql in the ON state (n10). The display LSI and the communication LSI with the host computer are initialized (nil), and then the state of the save flag is detected (n12).If the save flag has been set, the contents that have already been saved are stored in each register. , return other data to the state before the save processing, and resume execution (
n 13 ” n 14.). If the save flag is in the reset state, execution starts from the initial state (n 12
-=n15).

As described above, the data saving process can be reliably performed from when the battery cassette is removed until it is actually electrically separated.

FIGS. 7 and 8 show the configurations of the main parts of portable data processing devices which are second and third embodiments of the present invention.

As shown in FIG. 7, the structure of the electrodes of the battery cassette and the electrodes on the device main body side that contact them is such that the electrodes 3a and 3b on the battery cassette housing side of the device main body 1 are made longer, and the electrodes on the battery cassette 2 side are made longer. 4a and 4b may be shortened. In this case, the electrodes 4a and 4b on the battery cassette side are arranged at positions where they are connected to the electrodes 3a and 3b immediately after the insertion of the battery cassette 2 is started.

Further, as shown in FIG. 8, a mechanism 5' that simply locks the battery cassette is used as a means for detecting attachment/detachment of the battery cassette.
A switch 22 may be provided to detect the unlocking operation.

Next, a fourth device corresponding to the device according to claim 2 of the present invention
FIG. 9(A) shows the configuration of the main parts of the portable data processing apparatus according to the fifth and sixth embodiments.

(B), FIG. 10 and FIG. 1) are shown in FIGS. (A) and (B).

In the example shown in FIGS. 9(A) and 9(B), two oval convex portions 23, 23 are provided on both sides of the battery cassette 2, and correspondingly, the battery cassette 2 is temporarily engaged with the battery storage portion of the main body 1. Stop part 24
．． 24 and guide terminals 25, 25 are provided. With this configuration, as shown by the arrow in FIG. 9(B), when removing the battery cassette 2 from the main body 1 of the apparatus, first the battery cassette 2 is pulled out in a horizontal state by guiding the guide groove 25, and then the battery cassette 2 is pulled out by the guide groove 25. Rotate it once and pull it out vertically. By providing a continuous elastic electrode on the above-mentioned locking portion 24.24 and the guide groove 25°25, and providing an electrode on the convex portion 23.23 of the battery cassette example, when removing the battery cassette from the main body of the device, Since the battery cassette is temporarily locked, sufficient time can be gained from when the removal of the battery cassette is detected until it is actually electrically separated.Furthermore, as shown in FIG. 10, the battery cassette 2
and the main body 1 are provided with engaging pieces 26, 26 and 27.2, respectively.
7, in order to completely remove the battery cassette 2 from the main body 1 and to remove it electrically, a force greater than the initial force required to handle the battery cassette is required. Therefore, it is not possible to remove the battery in one action, and it is possible to buy time from when the start of battery removal is detected to when the battery is actually removed.

Furthermore, as shown in Figure 1), the battery cassette 2 may be provided with a special locking mechanism that engages with the main body and locks the battery cassette 2.

Figure (B) is an enlarged view of part A in (8). When inserting the battery cassette into the main body, the taper part 28 of the button automatically pushes the button into the battery center and locks it. It doesn't cost. When removed, the button protrudes into the hole on the side of the case of the main body 1 and is locked.

Only by pressing the button in this state can the battery cassette be completely removed. Next, FIG. 12 shows a circuit diagram of a main part of a portable data processing apparatus according to a seventh embodiment, which corresponds to the apparatus according to claims 3 and 4 of the present invention.

In FIG. 12, the voltages of the main battery 15 and the auxiliary battery 16 are connected to the diode D2. It is diode-ORed by D3 and supplied as a memory bank up power supply, and is supplied as a power supply to the CPU etc. through transistor Q1. Further, the oscillation frequency dividing circuit 30 is a circuit that provides a clock signal to the Cr'U 17 and also changes the frequency division ratio according to a signal from the CPU to switch the clock frequency. The other circuit configuration is the same as that shown in FIG.

Now, using the circuit configured as described above, the CPU 17 basically performs the same processing procedure as shown in FIGS. 5 and 6 (first embodiment), but the timer interrupt processing When removal of the register is detected, first, the frequency dividing ratio is changed to lower the clock frequency, and then the register saving process and subsequent processes shown in FIG. 5 are performed. Also, battery 08
Sometimes the initialization process (step n) shown in FIG.
In step 1)), a process is performed in which the frequency division ratio is set to a normal value and the clock frequency is increased.

By operating in this way, when the battery cassette is removed, the normal power supply voltage Vcc is restored by the sub battery 16.
The CPU continues to operate at a slightly lower voltage and clock frequency, and performs data saving processing in this state. Power consumption of the sub battery 16 can be suppressed by turning off the transistor Q1 when the data saving process is completed.

(a) Effects of the Invention According to this invention, when the battery is removed while the device is operating, sufficient backup processing time or necessary power supply voltage is secured, so data backup processing can be performed reliably. Moreover, since there is no need for large-capacity capacitors, the overall size of the device does not increase.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are an external view and a plan view of a portable data processing device according to a first embodiment of the present invention. Third
The figure is a circuit diagram of the main parts of the device. Figure 4 is a diagram showing the processing timing of CPtJ of the same device, Figures 5 and 6.
The figure is a flowchart 1 representing the processing procedure of the CPU. FIGS. 7 and 8 are diagrams showing the structure of the main parts of the apparatus according to the second and third embodiments. Figure 9 (A),
(B), FIG. 1O, and FIG. 1) (A) and (B) are diagrams showing the structure of the main parts of the apparatus according to the fourth, fifth, and sixth embodiments. FIG. 12 is a circuit diagram of the main parts of the device according to the seventh embodiment. FIG. 13 is a plan view showing the configuration of a conventional portable data processing device. 1-device main body, 2-battery cassette, 3a, 3b. 4 a. 4b=electrode.

Claims (4)

[Claims] (1) Electrodes are provided on the battery cassette and in the battery cassette storage area of the device main body that slide a certain distance to keep the battery connected when the battery cassette is attached to or removed from the device body, and a battery cassette attachment/detachment detection device is installed to detect the attachment or detachment of the battery cassette. A portable data processing device comprising: means for saving data when the start of removal of a battery cassette is detected by the battery cassette attachment/detachment detection means. (2) The portable data processing device according to claim 1, further comprising a temporary locking means for temporarily locking the battery cassette to the main body of the device while the battery cassette slides the certain distance when the battery cassette is removed. . (3) Equipped with a replaceable main battery that is used as the main power source for the entire device, and a sub-battery that backs up the memory when the main power is turned off and supplies power to the control unit.The main battery is detachable and detects whether the main battery is attached or removed. 1. A portable data processing device comprising a data saving processing means for performing data saving processing using a sub battery as a power source and then turning off the power when removal of the detection means and the main battery is detected. (4) The control unit includes a microprocessor, and further comprises clock frequency switching means for lowering the clock frequency of the microprocessor when the data saving processing means performs data saving processing using a sub-battery as a power source. portable data processing equipment.