JPH0338615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a small, portable, electronic desktop calculator.

Structure of a conventional example and its problems FIG. 1 shows an example of a conventional small calculator product. In FIG. 1, a indicates the main body of the product, b indicates a notebook-type case for storing the product, and c indicates a vinyl belt for attaching the product to the notebook case. According to the above configuration, the product body a and a notebook-type case b for protecting it and for portability are generally included as accessories. However, in the above conventional example, since the product body a and the notebook type case b are separate, there is a drawback that the thickness increases when they are attached, and the product itself may be troublesome to attach or subjected to a certain amount of vibration or shock after attachment. There was a drawback that a could be removed from the notebook type case b. Furthermore, since the product body a is made of a hard material such as plastic or metal, it is necessary to take care not to apply excessive force to the product body when carrying it. Furthermore, since the product body a is made of the above-mentioned hard material, the user tends to have an image of the product as being cold and hard, and there is a drawback that it is difficult to get out of it.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an electronic desktop calculator that eliminates the above-mentioned conventional drawbacks and is improved in terms of portability and usability.

Structure of the Invention The present invention comprises an electronic desktop calculator (calculator) whose exterior is composed of two flexible sheet materials, an inner skin and an outer skin, and a first film-like print provided between the sheet materials. The circuit part of the calculator is mounted on the board,
The circuit section, the display section, and the battery section are connected by another second film substrate, and a key cover sheet is provided on the surface of the inner skin, and between the key cover sheet and the third printed circuit board. A flexible electronic desktop calculator is constructed by configuring a key switch and connecting the key switch to the first printed circuit board.

DESCRIPTION OF EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. In Figures 2, 3, and 5, 1 is the outer cover of the calculator, which is made of flexible vinyl or leather and is formed into a rectangular sheet shape, and the edges are folded back for reinforcement or for connection with other parts. ing. Reference numeral 2 denotes the inner skin of the calculator, which is made of the same material as the outer skin 1, and is sewn to the outer skin 1 with a thread 21 at its end. Reference numeral 6 denotes a panel portion formed of a thin plate such as aluminum, whose peripheral portion is bent and adhered to the inner skin 2; 7, a liquid crystal display portion whose peripheral portion is held through a see-through hole provided in the panel portion 6; and 8, a liquid crystal display portion. Similarly, a battery section consisting of a solar cell or the like whose peripheral portion is held through another see-through hole provided by the panel 6; 9 is a first film substrate consisting of a flexible printed circuit board; and 9 is a first film substrate made of a flexible printed circuit board, which is bonded by means of bonding or the like with the outer cover 1; A circuit pattern is provided on the surface by printing or the like. 10
11 is an LSI chip mounted and fixed on the first film substrate 9 and equipped with electric circuits such as an arithmetic circuit for calculations or games and a display drive circuit; 11 is an LSI chip 10 on the film substrate 9 and a liquid crystal display 7; , a reinforcing plate made of plastic or the like for fixing and reinforcing the solar cell 8, etc., and 12 a sheet-like flexible second reinforcing plate connecting between the first film substrate 9, the display section 7, and the battery section 8; This is a film connector made of a printed board, and stable electrical connections are made using heat seals at the connection points with the display section 7 and the battery section 8, as well as the connection points with the first printed circuit board 9. Numeral 13 is a key cover sheet whose peripheral portion is held by the inner skin 2 and has a numerical value or key character pattern for functions printed on its surface, and has a convex surface to ensure key operations and key strokes. Reference numeral 14 denotes a third printed circuit board which is arranged on the lower surface of the key cover sheet 13 and has a conductive layer corresponding to the key pattern on the back surface thereof, and is folded into one sheet to form upper and lower key contact patterns. There is. Reference numeral 15 denotes a film spacer made of an insulating elastic material inserted between the third printed circuit boards 14 at key points. The tip of the key sheet 14 is electrically connected to the first printed circuit board 9 using heat sealing.

The outer skin 1 and the inner skin 2 are divided into an upper lid part 3, a lower lid part 4, and a hinge part 5 of the case, respectively.

According to the above structure, the film substrate 14 is inserted between the outer cover 1 and the inner cover 2, and a switch matrix is formed between the film substrates 14 via the key cover sheet 13 at the lower lid portion 4 of the film substrate 14. The film spacer 15 maintains insulation when the key cover sheet 13 is not pressed. Numerical values or function data input by pressing the key cover sheet 13 are supplied with power by the battery section 8, are computed by the LSI chip 10, and the computed results are displayed on the display section 7 via the display drive circuit. It works as a calculator.
The above is the operation when using a calculator, but when using a mobile phone,
It is folded as shown in FIG. 4 with the key cover sheet 13 and display section 7 facing inside with the hinge section 5 as a boundary.

According to the above configuration, the lower lid part 4 and the hinge part 5 are all made of flexible materials, while the upper lid part has a panel part 6 and the display part 7 and battery part 8 held therein are made of a hard material. , the display section 7 and the battery section 8
A flexible film connector 12 is connected between the
connected by. The other parts of the outer skin 1 and the inner skin 2 are also flexible, and the structure as a whole is extremely flexible. Furthermore, since a carrying case is not required, the overall structure can be made extremely thin.

In the above embodiment, the display section 7 and the battery section 8 are each made of flexible parts, and the panel section 6 is also made of plastic or leather to increase the flexibility of the upper cover section 3 as a whole. can also be considered. In such a structure, the reinforcing plate 11
can be made thinner or omitted.

Further, the film connector 12, the film substrate 9, and the key sheet 14 may be composed of one sheet. Alternatively, when the display section 7 itself is configured to be flexible, it can easily be formed integrally with the film connector 12. Furthermore, it is also possible to remove the key cover sheet 13 and print key characters directly on the surface of the key sheet 14. In addition, by printing key characters directly on the inner skin 2, a separate key cover sheet 13
Configurations other than this are also possible.

It is also possible to obtain a highly waterproof structure by using waterproof materials for the outer skin 1 and the inner skin 2, and by using a water-resistant adhesive for each joint. Figure 3 shows an example in which the display unit 7 and battery unit 8 are placed on the top cover to increase the key operation surface and improve operability, while Figure 6 is an example that takes advantage of miniaturization and practicality. shows. In the figure, a horizontally arranged key cover sheet part 13, a display part 7, and a battery part 8 are stored in the lower lid part 4, and the upper lid part 3 has a pocket part 16 in which thin small items such as a credit card 17 can be stored. This is an example of a credit card size calculator. This can also be expanded to checkbook size, etc.

FIG. 7 shows a three-stage opening structure with multifunctional keys, which is characterized by its thinness and flexibility. Display section 7
The display section 7 can be made relatively large, and the display section 7 can also function as a mirror when no power source is normally required.
The battery section 8 can have a storage memory function by incorporating a replaceable primary battery other than a solar cell. Each key surface has a hinge part 1
Parts 8, 19, and 20 can be opened and closed. In this case, a large number of keys can be stored.

Effects of the Invention As explained above, according to the present invention, the outer skin, inner skin, and flexible substrate are extremely thin, each having flexibility, so it is extremely compact when carried, and can also be used as a notebook as an accessory. Since there is no molded case, it is advantageous in terms of cost, has no unnecessary thickness, and has the advantage of giving a soft and warm impression when held in the hand. In addition, since the product itself is mostly flexible, bending and
It also has the advantage of being more resistant to twisting, impact, etc. than conventional products. Furthermore, by using expensive genuine leather for the outer skin, etc., it is possible to create a sense of luxury, and the calculator also has the characteristic of creating a sense of unity with the built-in components of the calculator, which has great industrial value.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the external appearance of a conventional small electronic desk calculator, Fig. 2 is a sectional view of an electronic desk calculator according to an embodiment of the present invention, Fig. 3 is a top view of the external appearance in use, and Fig. 4 5 is an exploded configuration diagram, and FIGS. 6 and 7 are plan views of more specific embodiments. 1...Outer skin, 2...Inner skin, 5...Hinge part, 9
...Film substrate, 13...Key cover sheet,
14...Film board, 12...Film connector.

Claims (1)

[Claims] 1 It has an upper lid part, a lower lid part, and a hinge part, and is equipped with a flexible sheet-like outer skin and a circuit part,
A first film-shaped printed circuit board housed in the upper lid part, electrically connected to the first film-shaped printed circuit board, stacked on the first film-shaped printed circuit board, stored in the upper lid part, and displayed. a second film-shaped printed circuit board having a battery section and a battery section; and a second film-shaped printed circuit board which is electrically connected to the first film-shaped printed circuit board by bending the film spacer between both sides and housed in the lower lid section. A third film-like printed circuit board, a key cover sheet which is stacked on the third film-like printed circuit board to constitute a key switch, and the ends of which are joined to the outer skin, the key cover sheet, the display section and the battery. An electronic desk calculator characterized by having an inner skin that exposes the inner skin to the outside, and which is foldable around the hinge part during transportation.