JPH0521157Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention mainly relates to a reset switch mechanism provided in an electronic device such as a desktop computer.

<Prior Art> A desktop electronic calculator (hereinafter referred to as a calculator) has a reset function for clearing the internal state of its arithmetic elements. However, until now, such a reset function has rarely been realized by the software of the arithmetic element, and generally it has been achieved by hardware by installing a reset switch, which is a separate component. It was often the case that the

FIG. 3 is a circuit diagram showing an example of a case where a reset function is provided in terms of hardware, and the reference numeral 30 in this figure is a calculator. In this calculator 30, a reset switch 34 is interposed between the power battery 31 and the reset terminal 33 of the CPU 32, and the closing operation of the reset switch 34
Battery voltage is applied to a reset terminal 33 of the CPU 32. In this figure, reference numeral 35 is a RAM, 36 is a display, and 37 is a display driver.

This reset switch 34 is shown in FIG.
Or, as shown in b, it is provided on the back side of the wiring board 38 housed inside the calculator 30 and is held so as to be able to come into contact with and separate from the reset wiring pattern (not shown) formed on the wiring board 38. There is.
Therefore, this reset switch 34 is
When the battery is pressed in the direction of arrow A from the back side of the battery to close the battery by contacting the reset pattern, the battery voltage changes to the reset terminal 33 of the CPU 32.
In addition, the reset function will work. In addition, the reference numeral 39 in FIG. 4 is a key top as an operation button for conducting the wiring pattern (not shown) on the front side of the wiring board 38, 40 is a key rubber attached to the inside of the key top 39, and 41
42 is a reset rubber, and 42 is a casing.

However, in the calculator 30 having such a structure, the reset switch 34 must be constructed as a separate part and attached to a predetermined position inside the calculator 30, which increases the number of parts that make up the calculator 30 and increases the number of parts. There was a problem that the installation cost increased.

<Purpose of the invention> The present invention was made in view of the above circumstances, and aims to reduce the number of component parts and the cost of installing parts in electronic devices such as calculators.

<Structure of the invention> By the way, as mentioned above, in order to activate the reset function in a calculator, etc., the power supply voltage is input as a reset signal to the reset terminal of the CPU, and the power supply battery is connected to a predetermined location on the wiring board. The connection is maintained in position by the battery terminal.

The present invention focuses on the above configuration and utilizes the existing battery terminals that hold the power battery to achieve the above object, and the wiring board has a reset wiring pattern near the loading position of the power battery. form,
Further, the ring-shaped battery terminal fixedly supported on the wiring board and in contact with the upper surface of the power supply battery is integrally formed with a reset switch piece that is bent downward and comes into contact with the reset wiring pattern when pressed from above. It is said that

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is an exploded perspective view of a reset switch mechanism in a calculator, and FIG. 2 is an assembled sectional view taken along the - line in FIG. 1. In these figures, numeral 10 is a wiring board, and 11 is a battery terminal with a reset switch mechanism. Note that the calculator 30 incorporating such a reset switch mechanism
The electronic circuit is constructed in the same manner as the conventional circuit diagram shown in FIG.

A pair of power wiring patterns 12 and 13 and a reset wiring pattern 14 are formed at predetermined positions on the surface of the wiring board 10, respectively. on the other hand,
The battery terminal 11 is composed of a lower battery terminal 15 and an upper battery terminal 16, and a power battery 17 such as a mercury battery is sandwiched between the two.

The lower battery terminal 15 is formed into a circular shape, and a cut-and-raised piece 18, . This lower battery terminal 15 is connected to one power supply wiring pattern 12 formed on the wiring board 10.

The upper battery terminal 16 is made of a ring-shaped metal plate, and protrusions 19, . Further, a pair of legs 20 and 21 are formed at symmetrical positions on the outer edge of the upper battery terminal 16 to be bent downward. And, each of these lower end portions 20a, 2
1a is brought into contact with the surface of the wiring board 10, and one lower end 20a is fixed with a screw 22, whereby the upper battery terminal 16 is fixed and supported on the surface of the wiring board 10. In addition, this leg 20
A protruding piece 23 extends from the lower end 20 a of the wiring board 10 , and the protruding piece 23 is connected to the other power supply pattern 13 of the wiring board 10 .

Furthermore, on the outer edge of this upper battery terminal 16,
A reset switch piece 24 corresponding to the reset wiring pattern 14 is integrally formed. This reset switch piece 24 is bent downward, and its lower end 24a faces the reset wiring pattern 14 at a distance so as to be able to come into contact with and separate from it.

At this time, since the upper battery terminal 16 is formed in a ring shape and the reset switch piece 24 is formed at the outer end of the upper battery terminal 16, the surface of the wiring board 10 Due to the above circumstances, reset wiring pattern 1
Even if the formation position of the reset switch piece 24 is changed, the formation position of the reset switch piece 24 can be changed without any inconvenience.

Next, the operation of the reset switch mechanism configured as described above will be explained.

First, when the calculator 30 is not reset, the battery terminal 11 with a reset switch mechanism has a lower end 24a of the reset switch piece 24 separated from the reset pattern 14 of the wiring board 10, as shown in FIG. , the reset function of the calculator 30 will not work.

Next, when the lower end 24a of the reset switch piece 24 provided on the upper battery terminal 11 is pressed in the direction of arrow B from the opening 26 side formed in the chassis 25 of the calculator 30, the corresponding The lower end portion 24a contacts the reset wiring pattern 14. Therefore, due to this closing operation, the voltage of the power supply battery 17 increases to the CPU 32 (see Fig. 3).
Since the reset function of the calculator 30 is applied to the reset terminal 33 of the calculator 30, the internal state of the arithmetic element is cleared.

In the above explanation, the present invention has been applied to a calculator, but the present invention is not limited to this and can be applied to other types of electronic devices that are equipped with power batteries. Not even.

<Effects of the Invention> As is clear from the above explanation, according to the present invention, the reset switch piece is formed integrally with the existing battery terminal by using the existing battery terminal, so that the battery terminal can be used as a component of the reset switch mechanism. In addition, there is no need to separately install the battery terminal and reset switch as separate parts as in the conventional case. Therefore,
The number of parts constituting the electronic device can be reduced, and the cost required for installing the parts can be reduced.

[Brief explanation of the drawing]

1 and 2 relate to the present invention; FIG. 1 is an exploded perspective view showing a reset switch mechanism, and FIG. 2 is an assembled sectional view taken along the line -- in FIG. 3 and 4 relate to a conventional example, FIG. 3 is a circuit diagram configuring the reset mechanism in terms of hardware, and FIGS. 4a and 4b are cross-sectional views showing the mounting structure of the reset switch, respectively. . 10...Wiring board, 11...Battery terminal with reset switch mechanism, 14...Reset wiring pattern, 15...Lower battery terminal, 16...Upper battery terminal, 17...Power battery, 24...Reset switch piece .

Claims (1)

[Scope of Claim for Utility Model Registration] A reset switch mechanism for an electronic device in which a power battery is loaded on a wiring board via a battery terminal, the wiring board having a reset wiring pattern near the loading position of the power battery. A ring-shaped battery terminal formed and fixedly supported on the wiring board and in contact with the upper surface of the power supply battery is integrally provided with a reset switch piece that is bent downward and comes into contact with the reset wiring pattern when pressed from above. A reset switch mechanism characterized by the following: