JPS60122455A - Small sized electronic device - Google Patents

Abstract

PURPOSE:To improve the efficiency of assembling by forming an upper case arranged to the upper side of a display element in sheet form elastic member to simplify the mounting the mounting of the display element and the structure of a key input section. CONSTITUTION:An upper face sheet 12 and an upper sheet 13 constitute an upper case of sheet form by being laminated closely together, and a lower face sheet 14 and a lower sheet 15 constituted a lower case 2 forming a sheet while being adhered closely. Plural key name print secitions 51 are printed to the lower face of the sheet 12 of an operating section 50 and moving contacts are formed respectively corresponding to the lower side of the print sections 51. Moreover, a display window print section 53 is formed to the lower face of the sheet 2 opposite to a display element 34 of an electronic component assembly 11. Then a small sized electronic calculator forming a incorporated sheet form as a whole is constituted by forming the cases 1 and 2 closely to the upper and lower side of the assembly 11.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to small electronic equipment.

[Prior art of the invention and its problems]

Conventionally, in small electronic devices equipped with various electronic components such as key power units and display elements, various electronic components are housed inside a case formed by combining an upper and lower case made of hard synthetic resin. At the same time, an opening is provided in a portion of the upper case where the display element is not disposed, and an operating member of the key manual section is provided. For this reason, the structure is complicated, the assembly requires many man-hours, and the overall thickness of the device becomes large.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and by making the upper surface of the upper case disposed above the display element a sheet-like elastic member, the mounting of the display element and the structure of the key manual part are simplified. It is simple, improves assembly efficiency, and
The purpose of the present invention is to provide a compact electronic device that can be made thinner.

[Summary of the invention]

In the small electronic device of the present invention, a key display section is printed on a top sheet made of a flexible transparent resin film, and a switch element for manual key operation is arranged corresponding to the key display section of the top sheet. A display element is brought into contact with the corresponding portion, various electronic components are held by a case member, and the peripheral edge of the upper sheet is fixed to the case member.

[Embodiments of the invention]

Embodiments of the present invention illustrated in the drawings will be described below.

An embodiment in which the small electronic device of the present invention is applied to a small electronic calculator will be described. FIGS. 1 to 3 show an embodiment of the present invention.

FIG. 1 is an external view of the small electronic calculator of this embodiment. As shown in this figure, the small electronic calculator has a rectangular sheet shape. Figure 2 is an exploded view of a small electronic calculator.
In this figure, 11 is an electronic component structure, 12 is an upper sheet, 13 is an upper sheet, 14 is a lower sheet, 15 is a lower sheet, and 16 is a frame. Each of these sheets 12°13.
14, 15 and the frame 16 each have a rectangular outer shape with the same size. The upper sheet 12 and the upper sheet 13 are laminated in close contact with each other to constitute the upper case 1 in the form of a sheet, and the lower sheet 14 and the lower sheet 15 are in close contact with each other to constitute the lower case 2 in the form of a sheet. are doing.

Then, the upper case 1 is laminated in close contact with the upper side of the electronic component structure 11, and the lower case 2 is laminated in close contact with the lower side of the electronic component structure 11.

Note that the frame 16 is stacked closely between the upper case 1 and the lower case 2, and supports the electronic component structure 11 by surrounding it. In this way, a small electronic calculator in the form of a rectangular sheet is assembled.

The configuration of each part of the small electronic calculator will be explained with reference to FIGS. 3 to 18. 3 to 9 are plan views showing each component. Figures 10 to 13 are cross-sectional views showing the laminated structure. Figure 10 shows the boundary between the substrate and the frame (section A in Figure 1), and Figure 11 shows the part where the operation switch is provided (Figure 1). Part B), Figure 12 shows the part where the display element is provided (
FIG. 1 (C part) and FIG. 13 show cross sections of the part where the battery is provided (first diagram part), respectively.

The electronic component structure 11 will be described with reference to FIGS. 3 and 14 to 18. As shown in FIG. 3, the substrate 21 is made of a glass epoxy resin or a bismaleimide-trianone resin and has a rectangular sheet shape with a thickness of about 190 μm, and predetermined wiring lines are formed on its upper and lower surfaces. A copper foil 22 having a thickness of about 35 μm is bonded with an insulating adhesive 23 having a thickness of about 20 μm. copper foil 22
The wiring patterns formed on the upper and lower surfaces of the substrate 21 include wiring, contacts, and terminals, and each wiring pattern on the upper and lower surfaces is connected through through holes (not shown) formed at predetermined locations on the substrate 21. There is. The wiring pattern on the upper surface of the substrate 21 is schematically shown in FIG. 3, and connects fixed contacts, capacitors, display elements, batteries, light emitting diodes, etc. around the integrated circuit element. One side of the board 21
In the half part, a plurality of fixed contacts 24, which are switch elements, are arranged in a grid pattern as part of the wiring/guttern, and the fixed contacts 24 consist of a pair of contacts.
Each contact is connected to an integrated circuit element 26, which will be described later, via wiring/mother turns. 14th in other faculties of board 2
As shown in the figure, in the hole 25 formed by leaving the wiring i4 turn (copper foil 22 and adhesive 23) on the lower surface side, there is a semiconductor integrated circuit element that performs a predetermined operation depending on the on/off state of the switch element. 26, i.e. large-scale integrated circuit (LSI)
The integrated circuit element 26 is supported by the wiring/arm turn on the lower surface side, and this integrated circuit element 26 is connected to the wiring/turn (copper foil 22) on the upper surface side of the substrate 21 via the gold wire 22, and The whole is sealed by being covered from above with an insulating resin 28 such as resin. The integrated circuit element 26 is, for example, 4 cm long x 4 terms wide x 200 cm thick.
The insulating resin 28 is, for example, 10 m long x 1011 II + 1 x 245 m thick from the top surface of the integrated circuit. A first hole 29 is formed in the other part of the board 21 leaving the wiring/guttern (copper foil 22 and adhesive 23) on the lower surface side.
As shown in FIG. 5(C), a chip type capacitor 30 is supported by wiring/turns on the lower surface side, and the electrodes 30a formed at both ends of the capacitor 30 are connected to the holes 29.
It is connected to the wiring/mother turn (copper foil 22) on the top surface of the board 21 by adhering it to the cream solder 31 applied to the top surface of the board 21, and the insulating adhesive 32 applied to the top surface of the board 21, such as UV curing ink, is attached to the surrounding area. is covered. Is this capacitor 30 wired? It is connected to the integrated circuit element 26 via the turns. The corner of the other end of the board 21 is cut out, leaving the wiring/mother turn (copper foil 22 and adhesive 23) on the bottom side, and the wiring/mother turn (copper foil 22 and adhesive 23) on the bottom side is left in this place, as shown in FIG. 16(C). Light emitting diode PS for power control supported by mother turn
The electrode 33a of the light emitting diode 33 is bonded to the cream solder 3 applied to the board 21 and connected to the wiring pattern (copper foil 22) on the top surface of the board 21. The periphery is sealed with an insulating adhesive 32 such as ultraviolet curable ink. The light emitting diode 33 is connected to the integrated circuit element 2 via wiring/9 turns.
Connected to 6. A display element 34, that is, a liquid crystal display element 34 is disposed on one side edge of the substrate 21, and is connected to wiring on the upper surface side of the substrate 21. As shown in FIG. 17, the display element (liquid crystal panel) 34 consists of a transparent resin film such as a polyester film having a polarizer layer therein, and a liquid crystal 37 sealed between upper and lower substrates 35 and 36 provided with colored electrodes. The periphery thereof is sealed with a seal 38, and a reflective plate 39 with a thickness of about 50 μm is placed on the lower surface of the lower electrode base 36 with a thickness of 15 μm.
It is attached using a certain amount of adhesive. A plurality of terminal electrodes 40 made of transparent conductive ink are connected to the electrodes of each electrode base 35 and 36 on the upper surface of the protrusion of the lower electrode base 36.
... are arranged in the longitudinal direction.

The display element (liquid crystal panel) 34 has a total thickness of about 550 μm, and has elasticity (
toughness). Further, on one side edge of the upper surface of the board 21, a plurality of terminals 41 are formed by extending the wiring/9-turn copper foil 22 and forming them in parallel in the longitudinal direction.
. . project laterally from the substrate 21. Display element (
Terminal electrode 40 of liquid crystal panel) 34 and terminal 41 of substrate 21
The contact surfaces are coated with a conductive adhesive 42, such as carton ink, to adhere to each other and electrically connected, and the surrounding area is coated with an insulating adhesive 32, such as ultraviolet curable ink. It's covered. Then, the display element 34 is connected to the substrate 2
It is connected to the integrated circuit element 26 via the wiring and the f-turn, and displays predetermined information based on the signal from the integrated circuit element 26. A display element 3 is provided on one side edge of the substrate 21.
A battery 43, for example, a solar battery, for supplying a driving voltage to the integrated circuit element 26 is arranged alongside 4 and connected to the wiring pattern of the substrate 21. As shown in FIG. 18, the battery (solar cell) 43 has a metal substrate 44 made of stainless steel or the like.
For example, an insulating layer 45 with a thickness of about 25μ on the top surface of the An amorphous solar cell layer 46 is deposited via a reimide, and a polyester film 47 with a thickness of approximately 175 μm is coated on the solar cell layer 46 as a protective layer. Terminal electrodes 48 and 48 are formed. This cell (solar cell) 43 has a total thickness of about 300 μm and has elasticity (toughness) as a whole. Further, on one side edge of the substrate 21, a copper foil 22 of a wiring pattern is provided at a portion facing the battery (solar cell) 43.
A pair of terminals 49 and 49 are formed by projecting laterally.

The terminal electrodes 48 of the battery (solar cell) 43 and the terminals 49 of the substrate 21 are electrically connected by applying a conductive adhesive 42, for example, Kagen ink, and adhering them to each other.
The surrounding area is covered with an insulating adhesive 32, such as an ultraviolet curable ink. For this reason, the battery (solar cell) 4
3 is an integrated circuit element 26 via the wiring pattern of the substrate 21.
It is connected to the.

The electronic component assembly 11 configured in this manner is placed inside the frame 16. The frame 16 is made of, for example, hard vinyl chloride and has a thickness of about 300μ, and has a rectangular frame shape as shown in FIG. Depending on the arrangement, it has a shape that runs along and surrounds the periphery of the component.

The frame 16 is arranged around the electronic component structure 11 to surround it, as shown in FIGS. 3, 10, 12, and 13.

The upper case 1 will be described with reference to FIGS. 4 to 6 and 10 to 13. Upper case 1 has upper sheet 12
This is a combination of the upper sheet 13 and the upper sheet 13. Top sheet 1
2 is a rectangular sheet with excellent strength (toughness) made of a transparent resin sheet such as preester film with a thickness of about 80 μm, and as shown in FIGS. 4 and 5, it is used as an electronic component structure. An operating portion 5o is provided at a location corresponding to the fixed contact forming portion of the first substrate 2. This operation section 5
o is each fixed contact 24 of the board 2 on the bottom surface of the top sheet 12.
A plurality of key name printing sections 51... are arranged and printed in a grid pattern corresponding to the key name printing sections 51...
A plurality of movable contacts 52 each having a thickness of about 15 to 30 microns are lined up and printed with carbon ink or the like to correspond to the lower side of the contact point. A frame-shaped display window printing section 53 forming a display window is printed on the lower surface of the top sheet 12 to face the display element 34 of the electronic component structure 11, and a frame-shaped display window printing section 53 forming a battery window corresponding to the battery 43 is printed. A battery window printed portion 54 is formed by printing. In addition, numeral 55 in the figure is a blind printing section. The upper sheet 13 is a rectangular sheet made of a synthetic resin having excellent strength (toughness) and having a thickness of about 180 μm, such as hard vinyl chloride. As shown in FIG. 6, a plurality of holes 56 are formed in the upper sheet 13 in correspondence with the fixed contacts 24 of the substrate 2, and are arranged to penetrate through the display element 34 and the battery. Holes 57 and 5g are formed side by side, corresponding to the holes 43 and penetrating vertically.

Note that 59 in the figure is a hole for allowing the integrated circuit element 26, capacitor 30, and light emitting diode 33 of the substrate 21 to escape. As shown in FIGS. 10 to 13, this upper case 1 has a thickness of 20 μm on the underside of the top sheet 12.
It is constructed by adhering and laminating the upper sheet 13 through an insulating adhesive 60 of approximately
2, the upper sheet 13 provides mechanical strength. The top sheet 12 covers the entire top surface of the top sheet 13, and the key name printed portions 51 of the top sheet 12 are hidden from above in correspondence with the holes 56 of the top sheet 13. Each movable contact 52... is connected to each hole 56...
・It is located in Display window printing section 53 on top sheet 12
The battery window printing portion 54 is located at the hole portion 57°58 of the upper sheet 13.
These printed parts 53.
A transparent top sheet portion surrounded by 54, that is, a display window and a battery window, covers the holes 57 and 58 so that the inside thereof can be seen through. The blind printed portion 55 of the top sheet 12 covers the entire upper side of each hole 59 of the top sheet 13. The upper sheet 13 serves as a spacer that separates the movable contact 52 of the upper sheet 12 from the fixed contact 24 of the substrate 21 and maintains the switch operation interval.

The lower case 2 will be described with reference to FIGS. 7 and 8, and FIGS. 10 to 13. The lower case 2 has a lower sheet 14
and a lower sheet 15. Bottom sheet 1
4 is a rectangular sheet with a thickness of about 80μ, made of synthetic resin such as je-lyester film, and has excellent strength (toughness).As shown in Fig. 6 pieces are formed by printing. The lower sheet 15 is a rectangular sheet with a thickness of about 80 μm made of a synthetic resin with excellent strength (toughness) such as hard vinyl chloride, and as shown in FIG.
A hole 62 for escaping the display element (liquid crystal panel) 34
is formed. As shown in FIGS. 10 to 13, the lower case 2 is made by laminating a lower sheet 15 on the upper side of the lower sheet 14 with an insulating adhesive 6o having a thickness of about 20 μm. 14 covers the entire lower surface of the lower sheet 15, and a blind printing part 6 covers and hides the holes 62 of the lower sheet 15 from below.

As shown in FIGS. 10 to 13, the upper case 1 is constructed by laminating the upper sheet 13 on the entire upper surface of the electronic component structure 11 and the frame 16 with an adhesive 60 having a thickness of about 20 μm. The lower case 2 is constructed by laminating the lower sheet 15 on the entire lower surface of the electronic component structure 11 and the frame 16 with an adhesive 60 having a thickness of about 20 μm. The upper case 1 includes a substrate 21 of the electronic component structure 11, an integrated circuit element 26, a capacitor 30. The display element 34 and battery 43 are supported and covered from above. The lower case 2 supports the substrate 21, display element 34, and battery 43 from below and extends over them. Here, as shown in FIG. 11, each hole 56 of the upper sheet 13 in the upper case 1 is positioned so as to surround each fixed contact 24 of the board 2 on the upper side, and Each movable contact 5
2 are located above the fixed contacts 24 through the holes 56. The key name printed portion 51 of the top sheet 12, the movable contact 52, the hole 56 of the top sheet 13, and the fixed contact 24 of the board 21 constitute an operation switch, and the key name printed portion 51 of the top sheet 12 is pressed from above. The movable contact 52 can be brought into contact with the fixed contact 24 of the push-down board 2 through the hole 56 of the upper sheet 13 and turned on. 1st
As shown in FIG. 2, the display element (liquid crystal/mother panel) 34 is connected to the sheet 12 surrounded by the display window printed portion 53 of the top sheet 12 through the hole 57 of the top sheet 13 in the top case 1.
That is, it faces the display window, and the display by the display element 34 can be viewed from outside the upper case 1 through the display window. As shown in FIG. 13, the battery (solar cell) 43 is inserted through the hole 58 of the upper sheet 13 into the portion of the sheet 12 surrounded by the battery window printed portion 53 of the upper sheet 12, that is, facing the battery window. , external light such as sunlight can be received from the outside of the upper case 1 through the battery window. Note that the display element 34 and the battery 43 are provided with, for example, ultraviolet curable ink 3 as a spacer and adhesive between their respective upper surfaces and the upper sheet 12.
2 is applied.

In this embodiment, the upper sheet 13, the lower case 2, and the frame 16 constitute a case member. Epidemic fbM
, 1 la J Wako Kamo 1φ like many.

In this way, the top sheet 12 is laminated in close contact with the upper side of the electronic component structure 11, and the lower case 2 in the form of a sheet is laminated in close contact with the lower side of the electronic component structure 11. A small electronic calculator whose entire body is in the form of a single sheet is constructed. This small electronic calculator consists of a top sheet 12 (80μ), an adhesive 6θ (20μ), an upper sheet 13 (180μ), an adhesive e o (20μ), a substrate 21 (300μ), an adhesive 6O (20μ), and a bottom sheet. The combination of sheet 15 (80μ), adhesive 60 (20μ), and bottom sheet 14 (80μ) results in a total thickness of 800μ.
It forms a very thin sheet of μ (0.8 m). Each sheet 12゜13.14.15 and the substrate 21 have a radius of curvature of 4
It has toughness with sufficient mechanical strength and elasticity for bending of about 0 ttm, and the small electronic calculator as a whole has excellent toughness. The display element (liquid crystal/mother panel) 34 and battery (solar cell) 43 of the electronic component structure 1 also have sufficient toughness against bending with a radius of curvature of about 40 tags. In addition, the top and bottom surfaces of the small electronic calculator are made up of the top sheet 12 and the bottom sheet 14, and the top sheet 12 is used to provide an input key operation section, so the entire computer is It is flat and has no uneven parts and is flat over the entire surface.

FIG. 19 shows another embodiment, in which the top sheet 12 and the top sheet 13 are not combined as an integral structure, but the top sheet 12 has a display window printing section (display window) 53 and an operation section 50. Only the upper case 1 is used as the upper case 1.

When using the top sheet 12 as the top case 1,
A spacer for the switch may be provided on the lower side of the top sheet 12 at a portion corresponding to the operating portion 50, and in this case, the lower case 2 is preferably made of thick and hard resin to provide strength. FIG. 19 shows an example of this case, and 68 in the figure is a spacer. In this embodiment, the case member is constituted by the lower case 27.Furthermore, the configuration of the operating section of the upper sheet 12 is not limited to that in the embodiment. The lower case 2 has a structure in which the electronic component structure 1 and the lower sheet I5 are integrally laminated and combined.
), both sheets are 14°1
It is also possible to use only one of the lower sheet 14 and the lower sheet 15 as the lower case 2 without combining the lower sheet 14 and the lower sheet 15 together. For example, as shown in FIG. 19, the lower sheet 15 can be used alone as the lower case 2. Although not shown, only the lower sheet 14 can be used as the lower case 2. In this way, the upper case 1 and the lower case 2 can be constructed by laminating individual sheets in close contact with each other on the upper and lower sides of the electronic component structure 11, respectively. The materials and thicknesses of the upper case 1 and lower case 2 are also not limited to the examples.

In addition, in the embodiment described above, the upper case 1 and the lower case 2
Although a frame 16 is provided between the upper case 1 and the lower case 2, for example, as shown in FIG. The electronic component structure 11 can be supported by the upper case 1 and the lower case 2 by directly adhering or fusing them together. In addition, upper case 1 and lower case 2
It is also possible to form a protrusion on the peripheral edge of one or both of the above.

Furthermore, in the electronic component structure 11, for example, the substrate 2
1 is not limited to the example, but may be divided into two pieces and electrically connected to each other as shown in FIG. In short, each component is electrically connected to form an electronic component structure. The battery is not limited to a solar cell, and a normal button-type battery may be used alone or in combination with a solar cell.

Note that the present invention is not limited to small-sized electronic calculators, but can be widely applied to small-sized electronic devices such as sheet-shaped electronic watches and electronic R-me machines.

〔Effect of the invention〕

As is clear from the above description, the small electronic device of the present invention is
A key display part is printed on a top sheet made of a flexible transparent resin film, and a key 7/chi element for manual key operation is arranged corresponding to the key display part of the top sheet, and also corresponds to the transparent part of the top sheet. Since the display elements are laminated and L7 is fixed so that at least the peripheral edge of the top sheet is fixed with a case member that holds various electronic components, the installation of the display elements and the structure of the key manual part are easy. It is extremely simple and extremely effective in improving assembly efficiency and making equipment thinner.

[Brief explanation of drawings]

1 to 18 show an embodiment of a small electronic calculator to which the present invention is applied. FIG. 1 is a perspective view showing the external appearance of the small electronic calculator, FIG. 2 is an exploded perspective view, and FIG. 3 shows the electronic component structure, (a) is a plan view, (a) is an exploded perspective view, FIG. 4 is a top plan view of the top sheet, FIG. 5 is a top plan view of the top sheet, and FIG. 6 is a top plan view of the top sheet. The figure is a plan view of the upper sheet.
Fig. 7 is a plan view of the lower sheet, Fig. 8 is a plan view of the lower sheet, Fig. 9 is a plan view of the frame, Figs. 10 to 13 are partial cross-sectional views of the small electronic calculator, and Fig. 14. FIG. 15(a) is a cross-sectional view showing the attachment part between the integrated circuit element and the substrate.
(b) (C) are cross-sectional views showing the case where the chip capacitor is attached to the board, respectively, and Fig. 16 (,) (b) (
C) is a sectional view showing the case where the light emitting diode is attached to the substrate, FIG. 17(a) 6) is a sectional view showing the case where the display element is attached to the substrate, and FIG. FIG. 19 is a sectional view showing another embodiment of the small electronic calculator, and FIG. 20 is an exploded perspective view showing another embodiment of the electronic component structure. 1... Upper case, 2... Lower case, 11...
Electronic component structure, 12...Top sheet, 13...Top sheet, 14...Bottom sheet, 15...Lower sheet, 16...Frame, 2...Substrate, 22... Copper foil,
24... fixed contact, 26... integrated circuit element, 30...
...Capacitor, 33...Light-emitting diode-P, 34...
・Display element (liquid crystal/mother panel), 43...battery (solar battery), 50...operation section, 51...key name printing section,
52... Movable contact, 53... Display window printing section, 54...
...Battery window printing section, 57-59...Hole section, 6th hole...
Blindfold printing part, 62... Hole part, 63... Positioning hole. Applicant's representative Patent attorney Takehiko Suzue Figure 1 3 Figure 3 (a) 3 (J 24 63 24 Figure 3 (b) Figure 4 Figure 5') 1 b2 55 Figure 6 Figure 7 Fig. 8 Fig. 10 Fig. 4 Fig. 11 qfuN ku ku - phrase 'S Ln は 方, Ou Fig. 16 1 Fig. 17

Claims (1)

[Claims] In a small electronic device equipped with a semiconductor integrated circuit element 2, a display element, and a battery for power supply, at least a key display section is printed on a top sheet made of a transparent resin film, and an inner surface of the top sheet corresponding to the key display section is provided. A switch element for introducing a key signal to the semiconductor integrated circuit element is disposed in the top sheet, and the display element is brought into contact with the inner surface corresponding to the transparent portion of the top sheet, and the case member A small electronic device that holds components and has a peripheral portion of the top sheet fixed to the case member.