JPS5938621B2 - Lighter with electronic desk calculator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a writer equipped with a small electronic computer called a calculator.

In recent years, electronic desktop calculators (hereinafter simply referred to as calculators) have become smaller, and devices integrated with smoking lighters have been proposed.

For example, a lighter with a built-in calculator that is ignited by continuous high-voltage sparks has already been commercialized. However,
Such a device has the disadvantage that high-pressure discharge, high-frequency oscillation, etc. are picked up as noise signals by the arithmetic circuit and display circuit of the calculator, thereby interfering with the proper functioning of the calculator. If you use a locking switch that directly opens and closes the power supply as an on-off switch for the calculator, if you turn off the power switch, the calculator circuit will not be affected by the noise caused by using a lighter, but if you forget to turn off the switch, If you do so, not only will the display change due to noise, but you will also have to operate the clear key again the next time you use it, which will consume a lot of battery power, make it cumbersome to operate, and easily make the device larger. .
Therefore, it is possible to turn the calculator on and off using an automatic return contact switch like other mansion keys, and use a device that also has an automatic power-off device built in, but this device is always on regardless of the on-off state. Since power is supplied from the power supply to the power circuit parts such as the arithmetic circuit and display circuit, noise caused by the use of the lighter is picked up by the calculator's power circuit, and for example, the arithmetic circuit that has been turned off may be turned on due to the noise. If you use the calculator again after using the lighter, the arithmetic circuit and display circuit may not be ready for normal operation even if you turn on the switch, and there is a high risk of malfunction. It's large. The present invention solves the above-mentioned drawbacks by providing a switch that turns off the arithmetic circuit and display circuit when the high voltage generating means of the lighter is activated. To provide a device that is easy to use both as a calculator and as a writer, without adversely affecting the circuitry of the calculator, while suppressing power consumption.

Embodiments of the present invention will be described below based on the drawings.

The case 1 is box-shaped and has an open top surface, a case lid 2 that covers the top surface is rotatably attached, and the parts of the ignition circuit, which is the high voltage generating means D of the lighter of this embodiment, are housed in the inner bottom. The insulating unit 3 and the fuel tank 4 are arranged side by side, and the flexible board 6 of the calculator, the integrated circuit 15, the flexible board stand 7, and the rubber plate 8 are placed on the insulating unit 3 and the fuel tank 4 through the body cover 5. , keys 9, a display panel 10 using liquid crystal, etc. are arranged.

As shown in FIG. 8, the high voltage generating means D (hereinafter referred to as the ignition circuit D) boosts the power supply voltage by a blocking oscillator 11, rectifies it, charges a capacitor 12, and repeatedly switches the power supply voltage to a step-up transformer by a switching element 13. A current is passed through the primary side of 14 to generate continuous high-voltage discharge sparks on the secondary side.

On the other hand, the power supply circuit, which is a component of the calculator circuit (Figure 7),
The main parts such as the arithmetic circuit B1 and the display circuit C are housed in a package of one integrated circuit 15 fixed on a flexible substrate 6, and a large number of terminals coming out of the integrated circuit package 15 are connected to the flexible substrate 6 for power supply, Connected to key contacts, etc. These terminals are all automatic return contact switch terminals, and once they are made conductive, they maintain that state until another signal is input. Therefore, the so-called on-off switch of the calculator that puts the calculation circuit B1 and the display circuit C in the ready state for operation is also an automatic return contact switch, and is maintained in the on or off state by operating the key 9, but in any case, the above-mentioned calculation Power is supplied to the power circuit portions of the circuit B and the display circuit C. Now, assume that you use the lighter after you finish using the calculator and operate the off key.

Although the calculator does not perform display or calculation operations by operating the off key, a certain voltage is applied to the power circuit section including the off terminal 16, so when the ignition circuit D of the lighter is activated, high frequency, high voltage discharge, etc. may be picked up as noise by the calculator circuit. For example, noise acts as an on signal,
Furthermore, it may function as a numerical value or other arithmetic operation, or as a display signal. Therefore, even if you press the on key again the next time you use the calculator, the display will not always be zero, and the subsequent calculations themselves may be completely incorrect, as well as wasting battery power. There is also. Therefore, the present invention performs the off operation while the ignition circuit D of the lighter is in operation, and the off terminal 16 is fixed to the lower end of the electrode stand 19 of the discharge electrode 18.

A gas opening/closing plate 20 of the lighter is located below the electrode stand 19, and a switch plate 21 is fixed to this gas opening/closing plate 20. This switch plate 21 is connected to the nozzle 22 and the fuel tank 4.
The switch terminal 21a is a ground side terminal with the same potential as the switch terminal 21a, and has two arms, one of which connects and separates from the contact plate 23 of the ignition circuit.
The other arm standing upward is the off terminal 1.
The contact terminal 21b is in contact with the terminal 6. Therefore, the off switch 17 is constituted by the off terminal 16 and the contact terminal 21b. When using the lighter, slide the switch operator 24 on one side of the case 1 upward.

This switch operator 24 is screwed onto an actuation plate 25 that is slidably guided by the insulating unit 3, and when the actuation plate 25 moves upward, one end engages with a stepped portion 25a of the actuation plate 25. The plate 20 also moves upward, pulling up the nozzle 22 to eject fuel gas, and bringing the switch terminal 21a and the contact terminal 21b of the switch plate 21 into contact with the contact plate 23 and the off terminal 16. At this time, the operating gap is determined so that the contact between the switch terminal 21a and the contact plate 23 is made after the contact between the contact terminal 21b and the off terminal 16, and the separation is made before that. Therefore, while the ignition circuit D is operating, a signal continues to be input to the off terminal 16, and even if noise from the ignition circuit D is picked up by the calculator's arithmetic circuit B and the power supply circuit section of the display circuit C. , the off signal never turns on, and even if noise signals are input to other terminals, the off signal is always in effect, so there will be no malfunction the next time you use the calculator. In this embodiment, the off switch 17 that conducts the off terminal 16 is connected to the ignition circuit D.
Since the off switch 17 is linked with the switch operator 24 of
Even if the OFF terminal 16 is a terminal for a simple automatic return contact switch, the OFF signal is always input, so noise can be completely cut out, and even when the ignition circuit D is in operation. Since the OFF signal is always inputted, noise can be eliminated no matter when the ignition occurs.

The present invention is as described above, and as a calculator, power is always supplied to the power supply circuit section of the arithmetic circuit and display circuit without directly turning the power on and off, and the arithmetic circuit and display circuit are operated by an automatic return contact switch.
Since the display circuit is turned on and off, a timer such as automatic power-off can be integrated, reducing battery consumption and making operation easier. In addition, the arithmetic circuit and display circuit can be turned off when the high voltage generation means is activated. Since the off switch is provided, it is possible to prevent malfunction of the circuit of the calculator due to noise from the high voltage generating means.

[Brief explanation of drawings]

Figure 1 is a front partial sectional view with a part removed, Figure 2 is A-
A cross-sectional view, Figure 3 is an enlarged partial cross-sectional view of the ignition switch in a non-operating state, Figure 4 is a partial cross-sectional view showing the same operating state, and Figure 5 is a perspective view when using a calculator. 6 is a perspective view when the lighter is in use, FIG. 7 is a block diagram showing the off terminal of the calculator, and FIG. 8 is a diagram of the ignition circuit of the lighter. 16...off terminal, 17...off switch, 21b...contact terminal, 24...
Switch operator, B... Arithmetic circuit, C...
...Display circuit, D...High voltage generation means.

Claims (1)

[Scope of Claims] 1. An electronic desk calculator that constantly supplies power to the power supply circuit section of the arithmetic circuit B and the display circuit C, and turns on and off the arithmetic circuit B and the display circuit C using an automatic return contact switch;
It is integrally equipped with a lighter that ignites the fuel gas with a high-pressure discharge spark generated in the high-voltage generating means D, and is provided with an off switch 17 that turns off the arithmetic circuit B and the display circuit C when the high-voltage generating means D is activated. A lighter with an electronic desktop calculator. 2. A lighter with an electronic desk calculator according to claim 1, wherein the operation of the off switch 17 is linked with the switch operator 24 of the high voltage generating means D. 3. The contacts of the off switch 17 are connected to the arithmetic circuit B and the display circuit C of the electronic desk calculator, and are interlocked with the off terminal 16 operated by an automatic return contact switch and the switch operator 24 of the high voltage generating means D. Contact terminal 21b
The electronic desk calculator according to claim 1 or 2, wherein an off signal is input to the off terminal 16 by maintaining the contact state between the off terminal 16 and the contact terminal 21b. Comes with a lighter. 4. A lighter with an electronic desk calculator according to claim 3, wherein the off terminal 16 and the contact terminal 21b are kept in constant contact while the high voltage generating means D is in operation.