JPS6225218B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a foldable electronic desktop calculator,
More specifically, it has a pair of cases that can be opened and closed, one case has a keyboard on the front and back, and the other case has a keyboard only on the inside. It concerns a foldable calculator (or simply a calculator).

In general, calculators are being improved in the direction of multi-functionality, and in particular, calculators with functional calculation functions have an extremely large number of key input information, and accordingly, a large number of key switches are arranged on the calculator. The need arose.

However, in many cases, the main feature of calculators is portability, so the area occupied by the keyboard is limited, so a method called the double function method is used as a means of incorporating all key input information.
A system was adopted that allows input of two or more input contents with one key. By the way, when such a double function method is adopted, if you want to input a certain content, you will have to press the key twice, making the operation complicated, leading to erroneous inputs, and slowing down the input speed. It was hot.

Therefore, the calculator was constructed from a pair of left and right cases.
A foldable calculator was proposed in which the two were foldably connected, the front and back sides of each case were used to create a multifaceted keyboard, and many input keys were provided. Adopting such a structure has the advantage that it can be folded compactly and made portable when not in use, even though it has a large number of input key groups.

However, if such a structure is adopted and different input key groups are placed on both the front and back sides of one case, a contact structure corresponding to each input key group will be required, which will complicate the internal structure.
The case becomes thicker, and the portability that is a feature of calculators is lost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a foldable calculator that has a simplified internal structure, a reduced case thickness, and improved portability.

In order to achieve the above object, in the present invention, the input keys arranged on both sides of one case of a calculator consisting of two cases that can be opened and closed are used as common keys that can be operated from both sides, and Arrange the input keys provided on the case and these keys facing each other, and when the case is closed, if you press the key located on the surface of the case side that has keys on both sides, the input keys on the other side of the case will be activated. We adopted a configuration in which the circuit automatically switches when pressed to perform a calculation function according to the input information on the key side located on the front side.

Hereinafter, details of the present invention will be explained in conjunction with embodiments shown in the drawings.

Figures 1 and 2 are for explaining the appearance of an embodiment of the calculator according to the present invention. At the side edge, it is rotatably supported by a shaft 4.

On the front side of the right case 2, for example, a key 5 with a key display 5a for four arithmetic calculations is arranged.
On the back side of these keys 5, function keys are displayed 5b as shown in FIG. That is, as is clear from FIG. 3, each of these keys 5 is one, and the key display 5a is shown on the front side, and the key display 5b is shown on the back side. As shown in FIG. 3, each of these keys 5 has a key shaft 6 horizontally protruding from its side surface.
The base end is rotatably supported by a pin 7. A protrusion 6a is formed at the tip of the key shaft 6 toward the inner back surface of the right case 2. An insulating elastic sheet 8 is disposed opposite to the protrusion 6a, and the dome-shaped protrusion A conductive rubber 9 is fixed to the back surface of the part, and this conductive rubber 9 is connected to a printed circuit board 1 fixed to the inner back surface of the right case 2.
It faces the 0 key pattern. Therefore, when the right case 2 is opened and the key 5 is pushed from the key display 5b side to the 5a side, the key shaft 6 is rotated counterclockwise in FIG. 3 about the pin 7, and the conductive rubber 9 and a key contact on the printed circuit board come into contact with each other, and predetermined input information is input.

On the other hand, key 1 located on the left case 3 side
1 is a function key, and these keys 11 correspond to keys 5 on a one-to-one basis. As is clear from the sectional view of FIG. 3, an insulating elastic sheet 12 is arranged below the key 11, and a conductive rubber 13 is fixed to the back side of the dome-shaped raised part. , this conductive rubber 13 corresponds to the key pattern of the printed circuit board 14 arranged on the left case 3 side. Therefore, as is clear from the sectional view of FIG. 3, when the left and right cases 2 and 3 are stacked and the key 5 is pressed from the front side, the key 11 is pressed in conjunction with this, and the conductive rubber 13 is pressed. Contact is made with the key contacts on the printed circuit board 14, and predetermined information is input.

By the way, a switching protrusion 2a is provided protruding from the right side of the case 2, and a through hole 3a is formed on the left side of the case 3 opposite to this protrusion 2a, so that when the left and right cases 2 and 3 are put together, the protrusion 2a presses down the insulating elastic sheet 12, switches the circuit switching contact (not shown) formed on the printed circuit board 14 via the conductive rubber 13, and displays the input circuit by the function key 11 and the key input display by the key 5. The configuration is such that the input circuit is automatically switched by an operation from the 5a side.

Further, power switches 15 and 16 are provided on the right case 2 side and the left case 3 side, respectively, and these power switches 15 and 16 are configured to be able to operate in conjunction with each other.

That is, as shown in the sectional view of FIG. 5, the power switch 15 provided on the right side of the case 2 has an opening 15a formed in its lower surface, and is configured to be movable in the horizontal direction. Further, the power switch 16 provided on the left side of the case 3 has a knob at its upper end that can be fitted into the opening 15a of the power switch 15, and a contact plate 17 is provided at the lower part of the power switch 16. The power switch can be switched by sliding on the contacts. Therefore, when the upper and lower cases 2 and 3 are combined, the upper and lower power switches 15 and 16 are integrated, and the upper power switch 1
By operating 5, the power switch 16 on the lower side, that is, on the left case 3 side, is switched, and the power can be turned on and off with the cases 2 and 3 closed.

On the other hand, a display 18 using a liquid crystal or the like is provided in a part of the left case 3 side, and the right case 2
A window 19 is formed on the side opposite to the window 19 through which the display 18 can be seen. Therefore, a single display 18 can be used to display numbers and calculation results corresponding to three keyboards.

Since this embodiment is configured as described above,
The keys on the right case can be pressed from both sides, and when the right case is closed, just by pressing the keys exposed on the outside of the right case, the key input on the left case will be the same as the key input on the front side of the right case. The circuit in the left case can be automatically switched so that the circuit in the left case can be automatically switched, and the structure is extremely simple, since only the circuits and contact mechanisms corresponding to the keys inside the right case are required. Both the power switch and the display can be shared, and the overall structure can be further simplified.

As is clear from the above description, according to the present invention, one of the left and right cases is a double-sided keyboard,
It is provided in correspondence with the keyboard of the other case, and the keys on both keyboards are configured as shared keys that can be pressed from both sides, and when the case is open, the keys inside both cases can be input independently. When both cases are closed, the key input contents of the left case are switched to the key input contents of the right case by a predetermined circuit switching mechanism, so there is only one key contact mechanism in the right case. Since only one set is required, the structure is simple, the number of parts can be reduced, and it is extremely advantageous economically.

[Brief explanation of the drawing]

The figure explains one embodiment of the present invention.
The figure is an overall perspective view with the left and right cases closed, Figure 2 is a perspective view with the left and right cases open, and Figure 3 is a perspective view with the left and right cases open.
The figure is a partially enlarged longitudinal side view with the left and right cases closed to explain the key structure, FIG. 4 is a partially enlarged longitudinal side view with the left and right cases closed to explain the circuit switching means, and FIG. is a partially enlarged longitudinal sectional side view with the left and right cases closed, illustrating the mounting structure of the power switch. 1... Calculator, 2... Right case, 3... Left case, 5, 11... Key, 6... Key axis, 9, 1
3... Conductive rubber, 10, 14... Printed circuit board,
15, 16...Power switch.

Claims (1)

[Scope of Claims] 1. A foldable electronic desktop calculator in which a pair of left and right cases are foldably connected by their side edges, a keyboard is provided in each case, and a contact mechanism is housed in each case, One of the cases is a double-sided keyboard, and each key is a shared type that can be pressed from both sides of the double-sided keyboard, and when both cases are open, the keyboards inside each case can function independently. When the closed state of both cases is detected, the circuit is switched so that when a key located on the front side of one of the cases is pressed, the key located on the other case is pressed by the pressing force, and the key located on the other case is pressed. 1. A foldable electronic desk calculator characterized by being provided with circuit switching means for inputting the input contents of the key input display displayed on the front side of the case. 2. The foldable electronic desk calculator according to claim 1, wherein one case is provided with a window, and the other case is provided with a display at a position facing the window. 3. Claims 1 or 3, characterized in that the power switch provided in one case is configured to be able to operate in conjunction with the power switch that operates the power circuit of the other case when both cases are overlapped. The foldable electronic desk calculator according to any one of Section 2.