JPS58151620A - Sheet-like small-sized electronic apparatus - Google Patents

Abstract

PURPOSE:To make a case thin remarkably, and to improve its portability, by constituting an electronic apparatus of upper and lower cases having toughness, which are made to closely adhere and are laminated on an electronic parts constitution body, and a frame for supporting the electronic parts constitution body by surrounding it. CONSTITUTION:A semiconductor integrated circuit element 26 for executing the opertion by turning on and off a switch element operated from the outside, a liquid crystal display element 34 for executing the display by a signal from the element 26, and a solar battery 43 for applying driving voltage to the elements 26, 34 are arrayed and connected on a substrate 21, by which an electronic parts constitution body 11 is formed. It is constituted so that a sheet-like upper case 1 and lower case 2, having toughness, respectively are made to closely adhere and are laminated on the upper side and the lower side of the constitution body 11, and a frame 16 having toughness supports the constitution body 11 by surrounding it. The case 1 consists of an operating part 50 for operating the switch element, an upper face sheet 12 having a display window 53 opposed to the element 34, and an upper sheet 13 having a hole part 56 corresponding to the switch element. The case 2 consists of a lower face sheet 14 and a lower sheet 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thin, sheet-like small electronic device.1 Recently, small electronic devices such as small electronic calculators, small electronic watches, and electronic R-time machines have been designed to be portable. There is a trend toward thinner products to make them even better.

Taking a small electronic calculator as an example, a portable calculator is a small and thin seed-like computer (like a credit card).
The goal is to have a card-like shape (1, i.e., thin like a sheet 9') "Scary - →, -44 穿-←1 sleep 04 stormy ocean ↓ film 4-ni-muki be small electronic type Development of computer (
is requested. .

However, this kind of conventional small electronic calculator has a case made of synthetic resin molded or a combination of metal plates, and inside this case there is a wiring board and a display. Parts such as panels and batteries are arranged.

However, the case structure of such conventional small electronic calculators is based on the idea of increasing the thickness of the case to provide high rigidity in order to protect the parts inside the case from external forces. For this reason, the wall thickness of the case cannot be made very thin, and therefore, the thickness of the entire case has been limited to about 1.6 mm at its thinnest part. This has led to the problem that the small electronic calculator, ie, its case, cannot be made extremely thin like a credit card.

The present invention has been made in view of the above-mentioned circumstances, and provides a sheet-like small electronic device that has a sheet structure in which a case containing an electronic component component is kept strong, is thin, and has improved portability. be,.

The sheet-like small electronic device of the present invention has a sheet-like upper case and a lower case that are laminated in close contact with each other on the upper and lower sides of the electronic component structure, and the electronic component is constructed with a frame between the two cases. It has a sheet structure that surrounds and supports the body, giving the case toughness and significantly reducing the thickness of the case.In addition, the case has increased strength and sealing performance, allowing it to reliably support electronic components. .

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

An embodiment in which the sheet-like small electronic device of the present invention is applied to a small electronic calculator will be described.

1 to 24 show one embodiment of the present invention.

Figure 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 shape3. Figure 2 is an exploded view of the small electronic calculator. In the figure, 11 is an electronic component structure, 12 is a top sheet, 13 is an upper sheet, 14 is a bottom sheet, 15 is a lower sheet, and 16 is a frame. Each of the sheets 12, 13, 14, 15 and the frame 16 has 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 form a T-shaped upper case 1, and the lower sheet 14 and the lower sheet 15 are laminated in close contact with each other to form a sheet-shaped lower case 2. It consists of Then, the electronic component structure 11 is surrounded and supported by the frame 16, and the upper case 1 is laminated in close contact with the upper side of the electronic component structure 11 and the frame 6. The lower case 2 is laminated in close contact with the lower side. 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 17. 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 1 will be described with reference to FIGS. 3 and 14 to 18. As shown in FIG. 3, the substrate 21 is made of glass epoxy resin or bismaleide-triazone resin and has a rectangular sheet shape with a thickness of 190 μm. Predetermined wiring A! Thickness 3 to form a turn
5μ 8 degree copper foil 22 with insulating adhesive 2 about 20μ thick
It is glued through 3. The wiring gloss turns formed by the copper foil 22 on the upper and lower surfaces of the substrate 2 include wiring, contacts, and terminals, and each of the four wiring turns on the upper and lower surfaces is a through hole (not shown) formed at a predetermined location on the substrate 21. are connected via. 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 thread type circuit element. On the top half of the board 21, a plurality of fixed contacts 24, which are switch elements, are arranged in a grid pattern as part of the wiring lines and turns, and the fixed contacts 24 consist of a pair of contacts. Each contact is connected to an integrated circuit control 26, which will be described later, via a wiring pattern. As shown in FIG. 14, in the other part of the board 216, a hole 25 is formed leaving the wiring pattern (copper foil 22 and adhesive 23) on the lower surface side. A semiconductor integrated circuit element 26 that performs calculations, that is, a large scale integrated circuit (LSI), is supported by a wiring pattern on the lower surface side, and this integrated circuit element 26 is connected to the upper surface side of the substrate 21 via a gold wire 27. It is connected to the wiring pattern (copper foil 22), and is covered from above with an insulating resin 28 such as silicone rubber or epoxy resin, and the whole is sealed. It consists of a square chip with a thickness of 200 μm, and J
The resin 28 is, for example, 10 mm long x 10 mm wide x 245 μm thick from the top surface of the integrated circuit.

As shown in FIG. 15(c), a chip type capacitor 3 is inserted into the hole 29 formed in the other part of the board 21, leaving the wiring pattern (copper foil 22 and adhesive 23) on the lower surface side.
The electrodes 30a formed at both ends of this capacitor 3θ are adhered to the cream solder 31 applied to the hole 29, and the capacitor 3θ
This capacitor 301 is connected to the wiring pattern (copper foil 22) on the upper surface side, and its surroundings are covered with an insulating adhesive 32 applied to the upper surface of the board 2, such as ultraviolet curing ink. and is connected to the integrated circuit element 26. The corner of the other end of the board 21 is cut out leaving seven turns of wiring (copper foil 22 and adhesive 23) on the bottom side, and the wiring nozzle on the bottom side is placed at this location as shown in FIG. 16(c). A light emitting diode 33 for controlling the power supply voltage is arranged to be supported by each turn, and the electrode 33a of this light emitting diode 33 is adhered to the cream solder 31 applied to the board 21, and the wiring pattern (copper The periphery is sealed with an insulating adhesive 32, such as an ultraviolet curing type or ink, applied to the upper surface of the substrate 21. The light emitting diode 33 is connected to the integrated circuit element 26 via a wiring no.F-turn 3. A display element 3, that is, a liquid crystal panel is arranged on one edge of the substrate 2, and the wiring on the upper surface side of the substrate 21・It is connected to that turn. As shown in FIG. 17, the display element (liquid crystal panel) 34 is made of a transparent resin film such as a polyester film with a polarizer layer therein, and a liquid crystal 37 is sealed between upper and lower substrates 35° and 36 provided with electrodes. and seal around it38
A plurality of terminal electrodes 40 made of transparent conductive ink connected to the electrodes of each electrode base 35 and 36 are arranged in the longitudinal direction on the upper surface of the protrusion of the lower surface body 3θ of the lower electrode base 3θ. Because of this, it 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 copper foil 22 of the wiring pattern and arranged in the longitudinal direction. protrudes to. The terminal electrodes 40 of the display element (liquid crystal panel) 34 and the terminals 41 of the substrate 21 are electrically connected to each other by applying a conductive adhesive 42 such as carden ink to their respective contact directions, and bonding them together. The surrounding area is covered with an insulating adhesive 32, such as ultraviolet curable ink.
, and the display element 34 is connected to the integrated circuit element 26 via the wiring (turns) on the substrate 2, and
3, which displays predetermined information based on signals from
A battery 43, for example a solar cell, for supplying a driving voltage to the integrated circuit element 26 is disposed on one side edge of the substrate 21, alongside the display element 34, and is connected to the wiring pattern of the substrate 21. As shown in FIG. 18, the battery (solar cell) 43 is made by depositing an amorphous solar cell layer 46 on the upper surface of a metal substrate 44 made of stainless steel or the like through an insulating layer 45 of about 25 μm thick, such as polyimide. A polyester film 47 with a thickness of about 175 μm is coated on the battery layer 46 as a retention layer, and a pair of terminal chambers are formed on the upper surface of the metal substrate 44 with an insulating layer 45 interposed therebetween. The battery (solar cell) 43 has an overall thickness of 3
It has elasticity (toughness) as a whole. Furthermore, a battery (solar cell) 4 is provided on one side edge of the substrate 21.
A pair of terminals 49 and 49 are formed by protruding the copper foil 22 of the wiring pattern to the side at locations opposite to the terminals 3.

The terminal electrodes 48 of the battery (solar cell) 43 and the terminals 49 of the base &91 are electrically connected by applying a conductive adhesive 42, for example, carton ink, and adhering them to each other.
The periphery thereof is covered with an insulating adhesive 32, such as an ultraviolet curing type infrastructure. For this reason, the battery (solar cell) 4
3 is an integrated circuit element 26 via the wiring pattern of the substrate 2.
It is connected to the.

The electronic component structure 11 configured in this manner is arranged inside the frame J6. 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. A frame 16 having a shape that surrounds the parts along the periphery according to the arrangement.
are arranged around the electronic component structure 11 as shown in FIG. 3, FIG. 10, FIG. 12, and FIG.
4 and the battery 43 are held by the frame 16 so as not to move laterally.

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. The top sheet 12 is a rectangular sheet with excellent strength (toughness) made of a transparent resin seal such as a polyester film with a thickness of about 80 μm, as shown in FIGS. An operating section 50 is provided at a location on the substrate 21 of the electronic component assembly 11 corresponding to the fixed contact forming section. The operating section 50 has a plurality of key name printed sections 5 on the bottom surface of the top sheet 12 corresponding to the fixed contacts 24 on the board 21.
are arranged in a grid pattern and printed, and a plurality of movable contacts 52 with a thickness of approximately 15 to 30 μm are lined up and printed with carton ink, etc., corresponding to the lower side of each key name printing portion 5. It was formed by 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. Battery window printing section 54
is printed. 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, the upper sheet 13 has fixed contacts 24 and
A plurality of holes 56 that penetrate vertically corresponding to K are formed side by side, and holes 57 and 58 that penetrate vertically correspond to the display element 34 and battery 43 are formed side by side. be. In addition, 59 in the figure is the integrated circuit element 26 of the substrate 21,
This is a hole for allowing the capacitor 30 and the light emitting diode 33 to escape. As shown in FIGS. 10 to 13, this upper case 1 has an upper sheet 13 bonded to the lower side of the upper surface p-, 72 with an insulating adhesive 60 having a thickness of about 20 μm and -13= degrees. The top sheet 12
In contrast, the upper sheet 13 provides mechanical strength.

The top sheet 13 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 The display window printing section 53 and the battery window printing section 54 of the top sheet 12 are located above the periphery of the hole N57, 58 of the top sheet 13 and are blindfolded.
The transparent top sheet portion surrounded by 4, that is, the display window and the battery window, covers the holes 57 and 58 so that the inside thereof can be seen through. The blind printing part 55 of the top sheet 12 is the top sheet 1
The entire upper side of each hole 59 of No. 3 is covered. In addition,
The upper sheet 13 serves as a spacer to separate the movable contacts 52 of the upper sheet IJ and the fixed contacts 24 of the substrate 21 and maintain the switch operation interval.

14- 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 made of a synthetic resin such as a polyester film with a thickness of about 80μ, and has a rectangular sheet shape with excellent strength (toughness).As shown in FIG. It is formed by printing. lower sheet 1
5 is a rectangular sheet with a thickness of about 80μ made of a synthetic resin with excellent strength (toughness) such as hard vinyl chloride, and as shown in FIG. A hole 62 is formed to allow the panel 34 to escape. As shown in FIGS. 10 to 13, the lower case 2 is made by laminating the lower sheet 15 on the upper side of the lower sheet 14 via an insulating adhesive 60 with a thickness of about 20 μm. 14 is the lower sheet 15
The lower sheet 15 has a blind printing part 6 covering the entire lower surface of the
The hole 62 is covered and hidden from below.

As shown in FIGS. 10 to 13, the upper case 1 is made by laminating the upper sheet 13 on the entire upper surface of the electronic component structure 1 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 supports and covers the electronic component component 110, the substrate 21, the integrated circuit element 26, the capacitor 30, the display element 34, and the battery 43 from above. The lower case 2 supports and covers the substrate 2, display element 34, and battery 43 from below. , the frame 16 is still closely sandwiched between the upper case 1 and the lower case 2 in a state surrounding the electronic component structure 11 2 , where the 11th
As shown in the figure, 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 21 on the upper side, and each movable contact 52 of the upper sheet 12・ is connected to the fixed contact 24 through the hole 56 .
- Located at -H. Key name printing section 5 on top sheet 12
1, movable contact 52, hole 56 of upper sheet 13, substrate 2
An operation switch is configured by the fixed contacts 24 of the upper sheet 12, and the movable contacts 52 are pressed down through the holes 56 of the upper sheet 13 and are connected to the fixed contacts 24 of the substrate 21 by pressing the key name printed portion 51 of the top sheet 12 from above. It can be operated by touching it. As shown in Fig. 12, display element (liquid crystal/! panel) 3
4 faces the portion of the sheet 12 surrounded by the display window printed portion 53 of the top sheet I2 through the hole 57 of the top sheet 13 in the top case 1, that is, the display window, and the display element 3
4 can be visually recognized from outside the upper case 1 through the display window. As shown in FIG. 13, a battery (solar cell) 43
faces the portion of the sheet 12 surrounded by the battery window printed portion 53 of the top sheet 12, that is, the battery window, through the hole portion 58 of the upper sheet 13, and sunlight etc. from the outside of the upper case 1 passes through the battery window. Can receive external light. Note that the display element 34 and the battery 43 are attached to the upper surface and the upper sheet 1, respectively.
For example, an ultraviolet curable ink 32 is applied as a spacer and adhesive between the two.

In this way, the electronic component configuration image 1 is surrounded and supported by the frame 16, the sheet-like upper case 1 is laminated in close contact with the electronic component configuration 11 and the upper side of the frame 16, and the electronic component configuration is By closely stacking the lower case 2 in the form of a sheet on the lower side of the body 1 and the frame 16, a compact electronic calculator having the form of an integral sheet is constructed. This small electronic calculator has a top sheet 12 (80μ) and an adhesive 6θ.
(20μ), top sheet 13 (180μ), adhesive 6
0 (20μ), substrate 21 (300μ), adhesive 60 (
20μ), lower sheet 1s (80μ), adhesive 60
(20μ) and the bottom sheet 74 (80μ) form a very thin sheet with a total thickness of 800μ (0.8W+). Each sheet 12.13, 14.1
5, the frame 16, and the substrate 21 have sufficient mechanical strength and elasticity to withstand bending with a radius of curvature of about 40 mm, and the small electronic calculator as a whole has excellent toughness. 3. Display element of electronic component structure 1 (
Similarly, the liquid crystal panel) 34 and the battery (solar cell) 43 have sufficient toughness against bending with a radius of curvature of about 40 degrees. In addition, the top and bottom surfaces of the small electronic calculator are formed by 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 flat. There are no uneven parts and the entire surface is flat. Also, upper case 1
By interposing the frame 16 between the upper and lower case 2, the electronic component structure 11 can be reliably supported from its periphery, and its strength can be increased by integrating with the upper and lower case 2. The frame 16 provides a gap close to the thickness of the electronic component structure 1 between the peripheral edges of the upper case 1 and the lower case 2, so that the peripheral edges of each case 1 and 2 can be sealed together easily and reliably. I can do it.

Next, an embodiment of the method for manufacturing this small electronic calculator will be described with reference to FIGS. 19 to 24. The basic manufacturing process consists of assembling the electronic component structure 11, molding each of the sheets 12 to 15 and the frame 16, and then forming upper and lower sheets 13.1 on the upper and lower sides of the electronic component structure 11.
At the same time, the upper and lower sheets 12 and 14 are laminated in close contact with the upper and lower sheets 13 and 15, and the periphery of the obtained laminate is cut into a predetermined external shape.

The case of assembling the electronic component structure 11 will be described with reference to the process diagram of FIG. 19. A roll film made of glass epoxy resin or the like is prepared by continuously winding a large number of films on a substrate 2 in which each hole 25°29 is formed into a roll, and this roll film is sequentially fed out and fed. Predetermined wiring and f-turns are formed using copper foil 22 on the upper and lower surfaces of each board 21, and then an integrated circuit element (LSI) 26 is bonded to the hole 25 of each board 2. After wire bonding 26 and sealing with resin 28, the roll film is cut into 2 pieces for each substrate 1, and the holes 29 and cutouts of the cut substrates 21 are filled with holes 29 and cutouts as shown in FIG. 15(a). 15(b), (c) and 16(b), ().
As shown in e), a capacitor 30 is placed in the hole 29 and a light emitting diode (LED) 33 is placed in the notch, respectively.
The solder 31 is melted and the capacitor 30 and the light emitting diode 33 are pressurized to fix them together. Then,
Adjacent to the substrate 2, a display element (liquid crystal panel) 34 and a battery (solar cell) 43 are attached. PK conductive adhesive 42, for example, terminal electrodes 40, 48 of the carbon in 1 display element 34 and battery 43 The bonded part was dried with hot air (temperature 120℃, time 6
0 seconds) to completely dry and solidify. Finally, an insulating adhesive 32 such as ultraviolet curable ink is applied to the terminal connection parts of the capacitor 30, light emitting diode 33, display element 34, and battery 43, and is cured by irradiating ultraviolet rays.
Note that positioning holes 6J for assembly jigs are formed at predetermined positions in the substrate 21, display element 34, and battery 43, respectively.

The case of manufacturing the upper and lower sheets 12 and 14 will be described. Both sheets 12 and 14 are roll films made of, for example, polyester and have a predetermined thickness of 80 μm. In the case of one top sheet 12, the roll film is fed out, and after printing the key name printing section 51, display window printing frame and battery window printing section 54 on each sheet 12 and applying carden ink, Cut into a predetermined shape. The lower sheet 14 is cut by cutting each sheet 14 after printing a blind printing part 61 on each sheet 14 while feeding the roll film.
As shown by the two-dot chain line in FIGS. 4 and 5, the lower sheet 14 is cut to have an external dimension larger than that of the final product, as shown by the two-dot chain line in FIG. 7. 3
Further, during this cutting, positioning holes 6 for an assembly jig are punched out in portions of the upper sheet 12 and the lower sheet 14 located outside the external dimensions of the final product. That is, the reason why each sheet 12, 14 is cut to a size smaller than the final product is to position and hold the sheet during the manufacturing process.

The case of manufacturing the upper and lower sheets 13, 15 and the frame 16 will be described. A roll film in which a film made of synthetic resin, for example, hard vinyl chloride, having a thickness corresponding to the thickness of each sheet 13° 15 and the frame 16 is wound, is prepared according to the manufacturing process of each sheet 13° 15 and the frame 16. Then, this roll film is sequentially fed out, cut and punched into a predetermined shape, and each sheet 13.degree. 15 and frame 16 are formed. The upper sheet 13 is cut into a larger external dimension than the final product as shown by the two-dot chain line in FIG. 6, and holes s56 to 59 are punched out. The lower sheet 15 is cut to a size smaller than the final product as shown by the two-dot chain line in FIG. 8, and holes 62 are punched out. The frame 16 is cut to have an outer dimension larger than that of the final product as shown by the two-dot chain line in FIG. 9, and the inside is punched into the frame shape shown. Additionally, positioning holes 63 are formed in the upper and lower sheets 13, 15 and the frame 16 at predetermined positions in the portion that will become the final product and the outer portion of the final product, respectively, as shown in FIGS. 6, 8, and 9. Form by punching.

Furthermore, each of the parts manufactured in this manner is assembled through the steps shown in the process diagram of FIG. 20. In this assembly, an assembly jig 64 shown in FIG. 21 and an assembly jig 65 shown in FIG. 22 are used, respectively. The assembly jig 64 is a stand 66
Positioning pins 67 are protruded from the top surface of the final product at predetermined positions on the inner side and at predetermined positions on the outer side of the final product. The assembly jig 65 has a positioning pin 67 protruding from the upper surface of a table 66 at a predetermined position on the outside of the external shape of the final product. Note that the stand 66 has a larger external dimension than the final product, and the position of each positioning bin 67 corresponds to the positioning hole 63 formed in each part. An insulating adhesive 6θ is applied, and the lower sheet 15 is positioned and held by an assembly jig 64. In this case, the positioning bin 67 of the assembly jig 64 is inserted into the positioning hole 63 of the lower sheet 15, and the lower sheet 15 is placed on the upper surface of the table 66. Next, the positioning bins 6 of the assembly jig 64 are inserted into the positioning holes 63 of the substrate 2, the display element 34, and the battery 43.
7, the electronic component assembly 1 is positioned and placed on top of the upper surface of the lower sheet 15 held on the stand 66. In this state, the electronic component assembly 11 and the lower sheet 15 are and are pressed together by applying pressure and heating. Next, the frame 16 is positioned using the positioning holes 63 and the positioning pins 67 of the assembly jig 64 in the same manner as in the above-described operation, and is placed over the upper peripheral edge of the lower sheet 15, and this frame 16 is pressurized and heated. It is then crimped onto the lower sheet 15. In this case, the frame 1625- will surround the electronic component structure 11.

Next, an insulating adhesive 60 is applied to the lower surface of the upper sheet 13, and the upper sheet 13 is positioned using an assembly jig 64 and placed on top of the electronic component structure 1 and the upper surface of the frame 16, and then processed. Pressure and heat are applied to press the upper sheet 13 to the electronic component structure 1 and the frame 16. In this way, a laminate is obtained in which the electronic component structure 11, the upper sheet 13, the lower sheet 15, and the frame 16 are combined and laminated in close contact. 23rd
The figure shows this laminate.

Next, an adhesive 60 is applied to the upper surface of this laminate, that is, the upper surface of the upper sheet 13. At this stage, an assembly jig 65 is used in place of the assembly jig 64. The laminate is positioned and placed on the upper surface of the stand 66 of the assembly jig 65 by passing the positioning pin 67 of the assembly jig 65 through the positioning hole 63 formed in the outer part of the final product in the laminate. . Next, the top sheet 12 is positioned using the assembly jig 65 to form the top sheet 1 in the laminate.
3, and the top sheet 12 is pressed onto the top sheet 13 by applying pressure and heating. Thereafter, ultraviolet rays are irradiated to cure the ultraviolet curable ink 32 on the display element 34 and battery 43. 3 Next, the laminate is reversed so that its vertical position is reversed, and it is positioned and held in the assembly jig 65 again, and the upper surface (lower surface) of the lower sheet 150 is
Apply adhesive 60 to. Next, the lower sheet 14 is positioned and held by the assembly tool 5 and placed over the surface (lower surface) of the lower sheet 15, and the lower sheet 14 is pressed onto the lower sheet 15 by pressure and heating. Through the manufacturing steps up to this point, a laminate is obtained in which the upper and lower sheets 12.14 are closely laminated on the upper and lower sheets 13.15, as shown in FIG. 24. That is, the electronic component structure 1
1. It is a laminate in which a frame 16, an upper case 1, and a lower case 2 are laminated together.

Furthermore, an outer peripheral side portion of this laminate that is larger than the outer shape of the final product is cut and formed into the outer shape of the final product shown in FIG. 7, a top sheet 12, a top sheet 13,
The lower sheet 14, the lower sheet 15, and the frame 16 are formed to have a larger outer shape than the final product, and the excess outer circumferential portion is cut off. That is, the outer circumferential portion of the laminate where the frame 16 surrounding the electronic component structure 1 is interposed is cut out to give the final product shape. .

In this way, as shown in FIG.
is surrounded and supported by a frame 16, and an upper case 1 and a lower case 2 are laminated on the upper and lower sides of the sheet-like small electronic calculator.

Therefore, the sheet-like small electronic device of the present invention has a sheet-like upper case and a sheet-like lower case closely laminated on the upper and lower sides of an electronic component structure, and furthermore, the electronic component structure is stacked between the two cases. It has a structure that surrounds and supports it. The upper case has a switch operation section and a display window and is in the form of a sheet that is tightly laminated on the upper side of the electronic component structure, and the lower case is in the form of a sheet that is tightly laminated on the lower side of the electronic component structure. It is something that does.

The upper case and lower case will be explained using a small electronic calculator as an example. In the above-described embodiment, the upper case 1 is constructed by combining the upper sheet 12 with the upper sheet 13 as a reinforcing and switch spacer as an integral structure, but the upper case has the basic functions described above. By making the upper sheet 13 into an integral structure, the upper case 1 can be constructed only by the upper sheet 12 having the display window printing section (display window) 53 and the operation section 50 without being combined.

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 corresponding to the operation part 50, and in the case of a trench, the lower case 2 and frame 16 are made of thick and hard resin to provide strength. It is preferable. FIG. 25 shows an example of this case. In the figure, 68 is a spacer 6. Also, the top sheet 12 is not made thin like the previous embodiment, but is made of hard chloride like the top sheet 13. It is formed thickly from vinyl to increase its own strength and can be used alone as the upper case 1. FIG. 26 shows an example of this. 3 In this case, the operating section of the upper sheet 12 may be made thinner only in that portion so that it can be operated with pressure, and a spacer 68 may be provided on the lower side. .

In short, the upper case 1 basically only needs to be a single sheet having an operating section and a display window, and can also have a multilayer structure. The configuration of the operating section is also not limited to the embodiment. Also,
In the above-described embodiment, the lower case 2 has a structure in which the lower sheet 14 and the lower sheet 15 are integrally laminated and combined, but the lower case 2 is laminated below the electronic component structure 1. It is also possible to use only one of the lower sheet 14 and the lower sheet 15 alone as the lower case 2 without combining the two sheets 74 and 15 together. For example, as shown in FIGS. 25 and 26, the lower sheet 15 can be used alone as the lower case 2. Further, 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 have a structure in which individual sheets are closely laminated on the upper and lower sides of the electronic component structure 11 and the frame 16, respectively.

Let's talk about the frame. The frame is located between the upper case and the lower case, and its basic structure is to surround and support the electronic component structure. In the embodiments described above and those shown in FIGS. 25 and 26, the frame 16
is formed as a separate body from the upper case 1 and the lower case 2, and the upper case 1 and the lower case 2 are in close contact with each other with an independent frame 16 interposed between the peripheral edges of the upper case 1 and the lower case 2. However, it is also possible to form a frame integrally with one or both of the upper case and the lower case, and to bring the upper case and the lower case into close contact with each other via the frame 16 formed integrally with the case. FIGS. 27 and 28 show an embodiment in which the frame 16 is integrally formed with the case. In this embodiment, the upper case 1 and the lower case 2 are constructed of a thick single sheet made of, for example, hard vinyl chloride. In this embodiment, a frame 1 having the same shape as the frame 16 described above is provided at the peripheral edge of the lower case 2.
6 are integrally formed. The electronic component structure 1 is arranged in four parts surrounded by the frame 16 of the lower case 2, and the upper case 1 is laminated in close contact with the electronic component structure 1 and the upper side of the frame 16.

Furthermore, the electronic component structure 11 is not limited to the base plate 1 of the embodiment, but may be divided into two pieces and electrically connected to each other as shown in FIG. 29. The five batteries that constitute the electronic component structure by electrically connecting each component are not limited to solar cells, but ordinary button-type batteries may be used alone or in combination with a solar battery.

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

As explained above, the sheet-like small electronic device of the present invention has the following features:
A sheet-like upper case and a lower case are laminated in close contact with the electronic component structure, and the electronic component structure is surrounded and supported by a frame between the two cases, thereby making the whole into an integrated sheet structure, For example, it is possible to make it extremely thin, less than 1 inch, and to have excellent toughness, thereby improving portability. However, by combining the upper and lower cases with a frame, it is possible to improve the adhesion between the upper and lower cases, constructing a strong sheet-like case with excellent sealing performance, and also to ensure that the electronic components are supported. can do.

[Brief explanation of the drawing]

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. Figure 3 shows the electronic component structure, (,) is a plan view, (b)
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, FIG. 6 is a top view of the -F section sheet, and FIG. 7 is a top view of the downward sheet. Figure 8 is a plan view of the lower sheet, Figure 9 is a plan view of the frame, Figures 10 to 13.
The figures are a partial sectional view of a small electronic calculator, FIG. 14 is a sectional view showing the mounting part between the integrated circuit element and the board, and FIG.
a), (b), and (c) are cross-sectional views showing the case where the chip capacitor is attached to the board, respectively, and Fig. 16 (a)
, (b) and (c) are cross-sectional views showing the case where the light emitting diode is attached to the substrate, respectively, and Fig. 17 (a) and (
b) is a sectional view showing the case in which the display teeth are attached to the board, box 18 (a) and (b) are sectional views respectively showing the case in which the battery is attached to the board, and Figs. This shows an example of manufacturing a formula calculator,
FIG. 19 is a process explanatory diagram showing the assembly process of the electronic component structure, FIG. 20 is a process explanatory diagram showing the entire assembly process, and stripes 21
Figure 22 is a perspective view showing the assembly jig, Figure 23 is a perspective view showing the assembly jig, respectively.
24 and 24 are respectively perspective views showing intermediate assembled products, FIGS. 25 and 26 are sectional views each showing an embodiment of a small electronic calculator pond, and FIGS. 27 and 28 are respectively frame configurations. FIG. 29 is an exploded perspective view showing another example of the electronic component structure. 1... Upper case, 2... Lower case, 11...
Electronic component constituent, 12...Top sheet, 13...Top sheet, 14...Bottom sheet, 15...Lower sheet, frame...16.21...Substrate, 22...Copper foil,
24... fixed contact, 26... integrated circuit element, 30...
...Capacitor, 33...Light emitting diode, 34...
・Display element (liquid crystal panel), 43... Battery (solar cell), 5θ... Operation section, 51... Key name printing section, 5
2... Movable contact, 53... Display window printing section, 54...
-Battery window printing part, 52-59...hole, 6I...blind printing part, 62...hole, 63...positioning hole,
64.65...assembly jig, 66...stand, 67...
Positioning bin, 68...Spacer. Applicant's agent Patent attorney Takehiko Suzue 1 [35-3N (a) 3WJ Figure 4 Figure 5 Figure 7 jI8 Figure b3 Figure 9 6 Figure 10 Figure 11 Figure 12 Figure 1 Yoyo+12 Figure 13-1; $ 14 Figure 15 Figure 16 $ 17 Figure 12 Figure 18 Figure 27 Cao Figure 28 Figure 29 j

Claims (1)

[Claims] A switch element that is turned on and off by external operation, a semiconductor integrated circuit element that performs calculations by turning on and off this switch element, a display element that performs display according to a signal from this integrated circuit element, and a driving voltage supplied to the integrated circuit element. an electronic component assembly having batteries electrically connected to each other; an operating switch for operating the switch element; and a display window facing the display element; a sheet-like upper case having;
a sheet-like lower case having toughness that is laminated in close contact with the lower side of the electronic component structure; and a toughness sheet-like lower case that surrounds and supports the electronic component structure between the upper case and the lower case. 1. A sheet-like small electronic device comprising a frame having a frame.