JPH029404Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a small-sized electronic device such as a small-sized electronic calculator, and particularly relates to a small-sized electronic device in which a keyboard portion and a display portion are foldable.

[Prior art and its problems]

2. Description of the Related Art Some small electronic devices, such as small electronic calculators, have a keyboard section and a display section that are foldable for convenient portability.

Conventionally, this type of foldable compact electronic calculator has a keyboard section and a display section each housed in separate cases, which are screwed to each case using hinges and folded. However, such a device has problems in that it has a poor appearance due to the hinges and screws, and the bending mechanism is easily broken by impact when dropped.

[Purpose of invention]

The present invention was developed in view of the above circumstances, and the keyboard section and display section are foldable, and the appearance quality is good and the folding section does not break even if subjected to impact. The purpose is to provide a small electronic device that does not exist at all.

[Summary of the idea]

In the small electronic device of the present invention, a switch unit in which a keyboard section is placed overlappingly on a reinforcing plate, and a display unit in which a display panel, wiring board, etc. are housed in an internal case are separated by a predetermined distance. , connect both with a flexible board,
and an upper exterior cover body and a lower exterior cover body separate from the upper cover body cover the upper and lower surfaces of both units, and the outer peripheral edges of both cover bodies are aligned and joined. The parts of the upper and lower exterior covers facing the separation part between the switch unit and the display unit can be folded as a connecting part.

〔Example〕

An embodiment of the present invention will be described below with reference to drawings.

The drawings show an embodiment in which the present invention is applied to a switch of a small electronic calculator, and FIG. 1 is a perspective view showing the entire small electronic calculator, and FIGS.
Each figure is a cross-sectional view showing each part of the computer, and FIGS. 5 and 6 are cross-sectional views showing enlarged switches.

The small electronic calculator shown in this embodiment has a foldable sheet structure, in which a battery/display part structure 1 and a keyboard structure 2 are foldably connected. The battery/display part assembly 1 includes an inner panel 5 made of, for example, an aluminum plate and having a battery window 3 and a display window 4;
an outer panel 6 whose peripheral edge is joined in combination with the outer panel 6; an exterior cover body 7 made of vinyl chloride or the like which covers the peripheral edge of the inner panel 5 and the outer surface of the outer panel 6 and extends to the outer surface of the keyboard structure 2;
A wiring board 8 provided inside the inner case of both panels 5 and 6, an electronic component 9 mounted on the wiring board 8, and a mounting fixture 10 mounted inside the inner panel 5 facing the battery window 3. Solar cell 1 electrically connected to wiring board 8 via lead wire 11
2. It is composed of a liquid crystal display panel 15 which is held down by a presser 13 inside both panels 5 and 6 facing the display window 4 and is electrically connected to the wiring board 8 via flexible leads 14. .

The keyboard structure 2 includes a keyboard section 16, which will be described later, a reinforcing sheet reinforcing plate 17 made of vinyl chloride or the like which is superimposed on the underside of the keyboard section 16, and a fixed contact sheet 27 of the keyboard section 16. The battery/
Flexible lead 18 electrically connected to wiring board 8 of display component 1, battery/display component 1
An exterior cover body (lower exterior cover body) 7 is extended from the outer cover body 7 through the connecting portion of both structural bodies 1 and 2 and covers the outer surface of the reinforcing sheet 17, and is joined to this exterior cover body 7 with the outer peripheral edges aligned, and a keyboard. 16 and the inner peripheral edge of the reinforcing sheet 17, and the inner panel 5 of the structure 1
It is comprised of a frame-shaped exterior cover body (upper exterior cover body) 19 made of vinyl chloride or the like that is bonded to the upper exterior cover body.

The structure of the keyboard section 16 and reinforcing sheet 17, ie, the switch unit, will be described with reference to FIGS. 5 and 6. The keyboard portion 16 includes a printed sheet 21 made of a resin film on which a large number of key symbols 20 of numbers, letters, and symbols are arranged and printed on the upper surface, and a large number of movable contacts 22 arranged on the lower side of the printed sheet 21 and stacked on the lower surface. A movable contact sheet 2 made of a resin film formed by arranging and printing
3. A spacer 25 made of a resin film which is arranged under the movable contact sheet 23 and has a large number of vertically penetrating through holes 24 lined up;
A fixed contact sheet 27 made of a resin film, which is arranged under the spacer 25 and has a large number of split fixed contacts 26 lined up and formed by printing on the upper surface, and wiring connecting these fixed contacts 26 is formed by printing, It is comprised of a spacer 30 made of a resin film which is bonded to the lower side of the fixed contact sheet 27 with a transparent adhesive 28 and has a large number of through holes 29 passing through it vertically. Further, in the figure, reference numeral 31 denotes a top sheet made of a resin film bonded to the upper side of the printing sheet 21 with a transparent adhesive 28. In this way, the keyboard section 16 has a sheet shape in which sheets are laminated. The reinforcing sheet 17 is placed under the spacer 30 in an overlapping manner. The reinforcing sheet 17 is formed with a large number of protrusions 32 that bulge upward in a semicircular shape, and these protrusions 32 are arranged and arranged below the fixed contacts 26 of the fixed contact sheet 27. has been done. Each of these protrusions 32 enters each through hole 29 of the spacer 30, and the top portion contacts the lower surface of the fixed contact forming portion of the fixed contact sheet 27 to support the fixed contact forming portion from below. In this way, keyboard part 1
6 and the reinforcing sheet 17, a large number of switches each including a movable contact sheet 23, a spacer 25, a fixed contact sheet 27, and the reinforcing sheet 17 are arranged side by side.

However, a switch with such a configuration,
Normally, the movable contacts 22 of the movable contact sheet 23 and the fixed contacts 26 of the fixed contact sheet 27 face the through hole 24 of the spacer 25 and are spaced apart from each other. and,
When pressing a switch, the operator looks at the key symbol 20 formed on the printed sheet 21, selects the desired switch, and presses the top sheet 31 downward from the top at the location corresponding to the selected switch. Press toward the side. The surface sheet 31 and the printed sheet 23 are bent downward by the pressing force of the finger, and together with this, the movable contact forming portion of the movable contact sheet 23 facing the through hole 24 of the spacer 25 is bent downward inside the through hole 24. nothing. When the finger is lowered by a predetermined amount, the movable contact forming portion of the movable contact sheet 23 moves to the fixed contact sheet 27.
, the movable contact 22 contacts the fixed contact 26 on the fixed contact sheet 27. At this stage, the operator's fingers cannot feel that the movable contact 22 is pressed into contact with the fixed contact 26. When the finger is further pressed down to apply a pressing force to the movable contact sheet 23, the movable contact sheet 23 applies a pressing force to the fixed contact sheet 27, causing it to bend downward. By the way, the fixed contact forming portion of the fixed contact sheet 27 is connected to the reinforcing sheet 1.
It is supported from below by the top of the protrusion 32 of No.7. Therefore, when the fixed contact forming portion of the fixed contact sheet 27 is pressed against the movable contact sheet 27, the protrusion 3
2 acts as a resistor, is restricted from descending downward, and is brought into pressure contact with the upper surface of the protrusion 32 . At the same time, the movable contact forming portion of the movable contact sheet 23 also moves to the fixed contact sheet 2.
The lowering is stopped while the fixed contact forming portion 7 is pressed. In this case, the contact forming portions of each of the contact sheets 23 and 27 are deformed along the upper surface of the protrusion 32, respectively.
In addition, the movable contact 22 and the fixed contact 26 are deformed along with the deformation of both contact sheets 23 and 27, and the pressing force applied from above to the movable contact sheet 23 by a finger and the elastic protrusion 32 cause the fixed contact sheet 27 to be They come into contact with each other reliably and stably due to the resistance force applied from below. Then, the finger that presses the switch receives resistance from the fact that the movable contact sheet 23 has descended to a predetermined lowering position and has definitely stopped, and cannot be lowered any further.
A feeling of pressing the switch is obtained until the switches 2 and 26 are securely in contact with each other. When the finger is then released, the movable contact sheet 23 and the fixed contact sheet 27 elastically return to their original positions and the switch opens.

Note that the small electronic device of the present invention is not limited to the structure shown in the embodiments; for example, the keyboard portion 16 may be made of at least movable and fixed contact sheets, a spacer, and a reinforcing sheet. Further, the present invention is not limited to small electronic calculators, but can be applied to other small electronic devices.

[Effect of idea]

As is clear from the above explanation, the small electronic device of the present invention has a switch unit in which the keyboard section is placed overlappingly on a reinforcing plate, and a display unit in which a display panel, wiring board, etc. are housed in an internal case, at a predetermined interval. The upper and lower surfaces of both units are connected by a flexible board at the spaced apart part, and the upper and lower surfaces of both units are separated by The outer peripheral edges of both the cover bodies are aligned and joined together, and the upper and lower exterior cover bodies facing the separation part between the switch unit and the display unit are foldable as connecting parts. Because of this structure, the external appearance is good, the folding portions are not damaged by impact as in conventional cases, and the connecting portions can be folded smoothly.

[Brief explanation of the drawing]

The drawings relate to the present invention: Fig. 1 is a perspective view showing a small electronic calculator as an embodiment of the invention, and Figs. 2 and 3 respectively show the battery/display component of the small electronic calculator. FIG. 4 is a sectional view showing a keyboard structure of a small electronic calculator, and FIGS. 5 and 6 are enlarged sectional views showing a keyboard portion and a reinforcing sheet, respectively. DESCRIPTION OF SYMBOLS 1...Battery/display part structure, 2...Keyboard structure, 12...Solar cell, 15...Liquid crystal display device, 16...Keyboard part, 17...Reinforcement sheet, 22...Movable contact, 23... ...Movable contact sheet, 24...Through hole, 25...Spacer, 26...
...Fixed contact, 27...Fixed contact sheet, 30...
Spacer, 32...protrusion.

Claims (1)

[Scope of utility model registration request] A display comprising a switch unit in which a keyboard section having a plurality of input operation sections is stacked on a reinforcing plate, a power supply battery, a display panel, and a wiring board housed in an internal case in which a display window facing the display panel is formed. The display units are arranged at a predetermined distance apart from each other, and the keyboard section of the switch unit and the wiring board of the display unit are electrically connected by a flexible board placed in the spaced apart part, and at least The upper and lower surfaces of the switch unit and the display unit are covered by an upper exterior cover body made of synthetic resin that is open at a portion facing the display panel, and a lower exterior cover body that is separate from the upper exterior cover body. The upper and lower exterior cover bodies are covered with each other, and the outer peripheral edges of both cover bodies are aligned and joined, and the parts of the upper and lower exterior cover bodies facing the separation part of the switch unit and the display unit can be folded as connecting parts. A small electronic device characterized by the following.