JPS583139Y2 - Key-controlled digital computing device - Google Patents

Description

[Detailed description of the invention] The present invention supplies power to keys such as numeric keys and arithmetic keys, a device main body including an arithmetic circuit section, a memory circuit section, etc., and each part of the above keys and the device main body. This invention relates to a key-controlled digital computing device comprising a power supply section, and in particular, it is designed to supply power to each part of the device main body by the operation of a specified person's key, and to prevent key operations from being performed. An object of the present invention is to provide a key-controlled digital arithmetic device configured such that the power is automatically cut off when the state continues for a predetermined period of time.

People often forget to turn off the power switch on key-controlled digital computing devices such as electronic desktop calculators after use.

Forgetting to turn off the power is especially a problem for battery-powered, key-controlled digital computing devices.

The present invention has been devised with this in mind, and has the purpose of providing a key-controlled digital computing device that allows power to be introduced into each part of the main body of the device by operating the input key, thereby making the introduction operation convenient. In order to achieve the above purpose, power is supplied to keys such as numeric keys and calculation keys, to the main body of the device including the arithmetic circuit section, memory circuit section, etc., and to each part of the above keys and the main body of the device. A key-controlled digital arithmetic device comprising a power supply section, a switching means, means for changing the state of the switching means from an OFF state to an ON state based on the operation of a specific key, and a means for changing the state of the switching means from an OFF state to an ON state based on the operation of a specific key. a manually operable means for transitioning from an on state to an off state; a means for outputting a control signal when a state in which no key is pressed continues for a predetermined time; and a means for changing the state of the switching means to an on state based on the control signal. means for transitioning from the on state to the off state, and starting power supply to each part of the device main body based on the transition of the switching means from the off state to the on state, and transitioning the switching means from the on state to the off state. The present invention provides a key-controlled digital arithmetic device characterized in that it is configured to include means for terminating the power supply to each part of the device main body based on the above.

The present invention will be explained in detail below with reference to the illustrated embodiments.

FIG. 1 is a diagram showing an embodiment of a control circuit for controlling supply cutoff of power to the main body of a key-controlled digital computing device according to the present invention, and FIG. 2 is a diagram showing an embodiment of the key-controlled digital computing device according to the present invention. FIG. 3 is a cross-sectional view of the vicinity of the power switch.

Identical parts in each figure are designated by the same reference numerals.

In this embodiment, a power switch is provided separately, and power is supplied to each part of the main body of the apparatus either by operating the power switch or by operating a specific person's key (clear key, etc.).

First, the control circuit shown in FIG. 1 will be explained, and then the mechanical relationship between the power switch and the solenoid will be explained.

That is, according to FIG. 1, a DC power source E, a power switch SW1, a diode D, and a device main body Z including an arithmetic circuit section, a memory circuit section, etc. are connected in series in a closed loop.

A solenoid S is connected in parallel to a series circuit consisting of a diode D and a device body 2 via the collector and emitter electrodes of a transistor Tr.

Further, after turning on the power switch SW1 and supplying the power supply voltage to the main body part 2 of the device, if a state in which no key operation is performed continues for a predetermined period of time, the voltage required for switching the transistor Tr is applied to the base electrode of the transistor Tr. A timer T is connected to the base electrode via a resistor R2.

An interlocking switch SW2 is inserted between the anode of the power source E and the collector electrode of the transistor Tr, which is interlocked with the operation of an input key related to operations such as number calculation of the key-controlled digital arithmetic device.

Next, the mechanical relationship between the power switch SW1 and the solenoid S will be explained.

First, the power switch SW1 mainly consists of a switch body 1, an operating rod 4 that rotates around a shaft 2 and presses a protrusion 3 protruding from the main body 1, and a permanent magnet 5 provided on the operating rod 4. ing.

The power switch SW1 is controlled to be turned on or off by pressing the protrusion 3 into the main body 1 by the operating rod 4.

Further, a spring 8 is attached to the operating rod 4 and has one end fixed to a spring stopper T provided on the main body 6 of the device.

The operating rod 4 is rotated about the shaft 2 by the attraction and repulsion between the permanent magnet 5 and the solenoid S generated by controlling the energization of the solenoid S provided in the main body 6.
In this case, the elasticity of the spring 80 is larger than the attraction force between the solenoid S and the permanent magnet 5 when not energized, and smaller than the attraction force between the solenoid S and the permanent magnet 5 when energized. When the operating rod 4 is separated from the solenoid S due to the repulsive force between the magnets 5, the operating rod 4 is rotated at 1 to the illustrated position.

Next, the operation of the power switch SW1 will be explained based on FIGS. 1 and 2.

The method of turning on the power switch SW1, which is shown in the off (OF'F) state in FIG. 1, is to manually turn it on (ON), that is, to explain in FIG. Turn the interlocking switch SW2 on by turning it in the direction of arrow C or by pressing a key such as the clear key in the case of an electronic desk calculator. There are two methods: applying a current in the direction in which an attractive force is generated between the solenoid S and the permanent magnet 5, rotating the operating rod 4 in the direction of arrow C in the figure using the attractive force, and turning on the power switch SW1. be.

Then, when the power switch SWI is turned on, the voltage of the power source E is supplied to the main body 2 of the apparatus, but if the state in which no key operation is performed continues for a predetermined period of time after the switch SW1 is turned on, an output signal is output from the timer T.

In addition, regardless of whether or not there is a key operation, the power switch SW
If a predetermined period of time elapses after turning on the timer T, an output signal may be output.

The output signal of the timer T turns on the transistor Tr.

Due to this switching of the transistor Tr, a current flows through the solenoid S in the direction of arrow B in the figure, that is, a current in a direction that generates a repulsive force between the solenoid S and the permanent magnet 5, so this repulsive force and the elasticity of the spring 80 turn off the power switch SW1. I am made to do so.

Here, the series circuit consisting of the resistor R1 and the capacitor C1 is a circuit that absorbs the reverse electromotive force stored in the solenoid S.

Further, the diode D is a diode that prevents a reverse voltage from being applied to the device body 2 due to a short circuit between the collector and emitter of the transistor Tr.

Next, each embodiment of the power switch will be described with reference to FIGS. 3 to 5.

That is, according to FIG. 3, when the push button 31 is pushed in the direction indicated by the arrow in the figure, one end of the lever 35, which is rotatable about the shaft 32, is pushed in that direction, and the other end is pushed in that direction, and the other end is pushed in that direction. is configured to push up in the direction of arrow E in the figure.

Note that 36 is a spring that rotates the lever 35, which was previously rotated to the position shown by the broken line, to the position shown by the solid line.

Next, according to FIG. 4, the tip of an operating rod 43 of a power switch is projected from a hole 42 provided in a cabinet 41 of the equipment.

The protruding tip is moved up and down in the directions of arrows F and G in the figure to control on/off of the power switch.

In the power switch shown in FIG. 5, when a slide lever 51 having a bent portion at its tip is slid from the solid line position to the broken line position 1, the operating rod 52 is lifted in the direction of arrow H by the bent portion.

By this lifting, the attractive force between the permanent magnet 5 provided on the operating rod 52 and the solenoid S is weakened, and the operating rod 52 is moved to the position indicated by the broken line at 1 by the elasticity of a spring (not shown), and the power is supplied. The switch is turned off.

The switch SW3 in FIG. 1 is used to apply a +V potential to the base of the transistor Tr via a resistor to turn on the transistor Tr and cause a current to flow in the solenoid S in the direction of arrow B in the figure.

That is, it is a switch for cutting off the supply of power to the main body part Z of the apparatus.

Furthermore, it is obvious that an electronic desktop calculator, an adder, etc. can be applied to the key-controlled digital arithmetic device described in the embodiment.

As detailed above, the key-controlled digital arithmetic device of the present invention includes keys such as numeric keys and arithmetic keys, an arithmetic circuit section,
In a device comprising a device main body including a memory circuit section, etc., and a power supply section that supplies power to the key and each part of the device main body, a switching means (power switch SWI in the embodiment); Means for transitioning the state of the switching means from the off state to the on state based on the operation of a specific key (such as the same clear key) (the interlocking switch SW2, the solenoid S, the permanent magnet 5, the operating rods 4, 34, 43° 52, and a protrusion 3), a manually operable means (switch SW3 or operation rod 4, push button 31, operation rod 43, or slide lever 51) for changing the state of the switching means from an on state to an off state, and a key operation means (timer T) for outputting a control signal when a state in which no operation is performed continues for a predetermined period; and means (transistor Tr, solenoid S) for shifting the state of the switching means from the on state to the off state based on the control signal. , permanent magnet 5,
Operation rod 4, 34, 43, 52. Based on the spring 8 and the protrusion 3) and the transition of the switching means from the OFF state to the ON state, power supply to each part of the device body is started, and the switching means is transitioned from the ON state to the OFF state. Means for terminating the power supply to each part of the main body of the apparatus based on the above (power supply E, power switch SW1)
According to the key-controlled digital arithmetic device of the present invention, when a state in which no key operation is performed continues for a predetermined period of time, The timer is activated and the power to each part of the main body of the device is cut off, so even if you forget to turn off the power, you can press the buttons to reduce power consumption.

Furthermore, since the specific person's key is also used as the power on key, the configuration can be simplified.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an embodiment of a circuit for controlling the on/off of a power switch of a key-controlled digital computing device according to the present invention, Fig. 2 is a cross-sectional view of the vicinity of the switch, and Figs. 3 to 5 are power supplies. It is a figure which shows each Example of a switch. E...Power supply, SWl...Power switch, SW2...
・Interlocking switch, S... Solenoid, 2... Device body, T... Timer, 5... Permanent magnet, 4, 34
,43゜52...Operating rod, 3...Protrusion, SW3・
...Switch, 31...Push button, 51...Slide lever, Tr...Transistor, 8...Spring.

Claims (1)

[Scope of Claim for Utility Model Registration] Keys such as numeric keys and arithmetic keys, a device main body including an arithmetic circuit section, a memory circuit section, etc., and a power supply section that supplies power to the keys and each part of the device main body. A key-controlled digital computing device comprising: a switching means; a means for changing the state of the switching means from an off state to an on state based on the operation of a specific key; and a means for changing the state of the switching means from an on state to an off state. means for outputting a control signal when a state in which no key is pressed continues for a predetermined period; and means for transitioning the state of the switching means from the on state to the off state based on the control signal. and starts power supply to each part of the apparatus main body based on the transition of the switching means from the off state to the on state, and starts the power supply to each part of the apparatus main body based on the transition of the switching means from the on state to the off state. 1. A key-controlled digital arithmetic device, comprising: means for terminating power supply to each part of the unit.