JPS6119053B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in electronic equipment having a keyboard, such as an electronic desktop calculator (hereinafter referred to as a calculator).

Calculators often have a large number of key switches installed on the same plane as an input means, but when there is a large amount of input information, such as in a function machine or a programming machine, the number of key switches becomes significantly large.
Since these are arranged on the same plane, the keyboard becomes very large, which is inconvenient when carrying the calculator.

Therefore, the present invention aims to improve the above-mentioned drawbacks. The drawings will be explained below. Figures 1 and 2 show the external appearance of a foldable calculator that employs an embodiment of the present invention.As shown in Figure 1, when it is closed, it consists of a keyboard that handles only four arithmetic operations. When opened and used as shown in FIG. 2, it can be used as a program calculator, and since many key switches are required to input a predetermined program, key switches are arranged on both sides.

In other words, the calculator shown in this figure is for upper and lower cases 1,
2, and both can be rotated by a rotating shaft 6. The upper case 1 side has a key surface 3 for four arithmetic operations and an opening 8 for display. The back side of the keyboard 3 has a key top 9 on which a key surface 4 for inputting program calculations is formed. In addition, a key surface 5 for inputting program calculations is arranged on the lower case 2 side, and a display 7 is arranged opposite to the display opening 8 to display input contents, calculation results, etc. do. Furthermore, an electronic circuit (not shown) is provided inside the cases 1 and 2 to perform arithmetic processing.

Therefore, when performing normal arithmetic operations, as shown in Figure 1, by operating the key surface 3 with cases 1 and 2 closed, the input contents and calculation results are displayed on the display 7 provided on case 2. etc. can be visually observed through a display opening 8 provided at a position facing the display 7.

Also, when using it as a program calculator,
The cases 1 and 2 are opened by the rotating shaft 6 as shown in FIG.
By the operation 5, key input contents, calculation results, etc. are displayed on the display 7.

The double-sided keyboard preferably has a structure that is as thin as possible in consideration of the portability of the computer, and it is preferable that the amount of protrusion of the key tops is small due to the foldable structure.
This is advantageous because the thickness when folded can be reduced.

Keyboard structures that take into consideration the conditions of the double-sided keyboard are shown in FIGS. 3, 4, and 5.

A hole 1a slightly larger than the key top 9 is provided in the key top placement part of the case 1, and the key contents 3 and 4 are clearly printed on both sides of the key top 9, and a cylindrical collar 10 is provided.
It is rotatably mounted on the rotary shaft 9a in the direction of the arrow in the figure. Furthermore, printed circuit boards 11a and 11b are provided inside the case 1, and conductive rubber contacts are provided on the printed circuit boards 11a and 11b to correspond to the respective key positions. 12a, 12b
are provided, and the conductive rubber contacts 12a, 1
By pressing 2b, patterns 13a and 13b arranged on the printed circuit board 11 are made conductive,
Completes a keystroke operation. Therefore, the collar 10, which is rotatably attached to the key top 9 mentioned above, is
As shown in the figure, the key top 9 is held near the center of the case 1 by being inserted and fixed by the case 1. Therefore, as shown in Figure 4, key top 9 is
By pressing downward, the rotation shaft 9a causes the key shaft 9b to push up the conductive rubber contact 12a and turn on the pattern on the printed circuit board 11a. Further, by pressing the key top 9 upward, the conductive rubber contact 12b is pressed down and the pattern on the printed circuit board 11b is turned on, so that the key input contents on both sides can be input using one key top.

As is clear from the above explanation, the case keyboard section has an opening slightly larger than the key top, and the key top with input contents written on both sides is rotatably mounted near the center of the case. By pressing the conductive rubber contacts provided on the keyboard, it is possible to enter the specified key content, the keyboard can be made thinner, and it is possible to reduce costs by allowing input from both sides with just one key top. becomes.

[Brief explanation of the drawing]

1 and 2 are external perspective views of a program calculator having a double-sided keyboard according to an embodiment of the present invention, FIGS. 3 and 4 are partially enlarged sectional views of the double-sided keyboard section, and FIG. It is an exploded perspective view. 1, 2...Case, 1a...Key hole, 3, 4,
5... Key surface, 6... Rotation axis, 7... Display, 8
...Display opening, 9...Key top, 9a...
Rotation axis, 9b...Key axis, 10...Color, 11
a, 11b...Printed circuit board, 12a, 12b...
...Conductive rubber contacts, 13a, 13b...Key pattern.

Claims (1)

[Claims] 1. A device body penetrated by a through hole, a pair of switch means housed within the device body,
An electronic device comprising: a key means disposed in a through hole of the device body; and a pressing means for selecting and pressing one of the pair of switch means depending on the moving direction of the key means. .