JPS6214254A - Electronic equipment - Google Patents

Abstract

PURPOSE:To prevent the deformation and the damage due to the external force by holding the solar battery and the displaying device by surrounding them with the resin frame to insert and mold the metallic reinforced plate. CONSTITUTION:On a covering sheet 1 made of a translucent film material, a key symbol 1K is printed, and 1B and LD corresponding to a displaying part and a solar battery part come to be a transparent part which is not printed. Into a frame 2 formed by an insulating plastic, a reinforced plate 3 formed by the metal having the rigidity at the part to surround a solar battery 9 and a displaying device 10 is inserted and molded. A contact sheet 4, an insulating spacer 5 and a printing circuit substrate 6 are laminated in order under the frame 2, and the rear surface of the equipment is formed by a metallic reinforcing plate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an electronic device, particularly an electronic device having a solar cell and a display facing the outside of the device.

[Prior Art] There has been a remarkable progress in reducing the size and weight of devices such as electronic desktop calculators (hereinafter referred to as calculators). Furthermore, due to power saving in circuits, it has become possible to drive all circuits with solar cells.

[Problems to be Solved by the Invention] Therefore, this type of device has greatly improved portability compared to previous devices, and can be used under a wide range of environmental conditions. In particular, thin devices such as credit card calculators are used in a manner where they are easily subjected to stress such as warping, twisting, and bending, such as being stuffed into a commuter pass when being carried around. Thinner devices do not have a structure in which a circuit board is housed in a case, but often have a structure in which members such as a board 9 display, a solar cell, etc. are laminated with reinforcing plates interposed therebetween.

Therefore, there is a problem in that directly sandwiched or stacked displays and solar cells are damaged due to stress caused by bending or twisting.

A liquid crystal display is an example of a display device with low power consumption, and this display device has a structure in which a liquid crystal substance is sealed between thin glass plates. Furthermore, solar cells include those that use a thin plate of silicon single crystal, and those that use an amorphous silicon layer on a glass plate. These displays and solar cells are often made of thin glass substrates to make them thinner, so J1
Always brittle and easily damaged by the slightest stress.

[Means for Solving the Problems 1] In order to solve the above problems, the present invention provides an electronic device in which a solar cell and a display are exposed to the outside of the device, in which a resin frame is formed by insert molding a metal reinforcing plate. A structure is adopted in which a structure is provided in which a frame is provided to surround and hold the solar cell and the display device.

[Function] The frame 2 in FIG. 1 is made of resin molded by inserting a reinforcing plate 3 made of a metal plate. The reinforcing plate 3 has a flange 3F on the outer periphery to ensure rigidity as shown in FIG. 4, and supports the solar cell 91 so as to surround the display 10 as shown in FIGS. 5 and 6. Therefore, even if stress is applied to the entire device, it will not be easily deformed, and accidents such as damage to the solar cell 1 indicator can be prevented.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 is an exploded perspective view showing the structure of a thin calculator as an example of an electronic device according to the present invention. By stacking the illustrated members, a card-shaped calculator with a row view as shown in FIG. 2 is obtained.

First, to explain the exterior, as shown in FIG. 2, a keyboard K consisting of a plurality of number keys and arithmetic keys is formed on the surface of this calculator. In front of the keyboard, there is a display section consisting of an LCD for displaying human input and calculation results in a visual format, and a solar cell section B that supplies power to the circuits within the device.

The surface of the device shown in Fig. 2 is made of a facing sheet l shown by No. n l in Fig. 1. The facing sheet l is made of polyester, polycarbonate (polycarbonate), 111 vinyl, etc., which have good light transmission properties.
Key symbols IK for the keyboard are printed on a flexible film material such as urethane. The portion corresponding to the display portion and the solar cell portion B is not printed, and is a transparent portion 10 that takes advantage of the transparency of the material. It has become IB.

A frame 2 made of integrally molded insulating plastic is arranged at the bottom of the facing sheet 1. As shown in FIG. 3, a reinforcing plate 3 made of a thin metal plate is insert-molded in the frame 2. Key manpower parts 2K are formed at positions corresponding to the key symbols IK of the covering sheet l, respectively.

' is located on the inner key top 2 at the center of the circular hole in the key manpower part 2 , and its upper surface is approximately at the same height as the -L surface of the frame 2 . It is formed integrally with the main body by "" on a plurality of arms 2. Therefore, when the key symbol IK part of the cover sheet 1 attached to the upper surface of the frame 2 is pressed, the film of the cover sheet 1 bends downward, and the inner The key top 2 presses the F surface of the arm 2, and the arm 2 is elastically deformed so that the arm 2 is displaced downward in a substantially parallel manner.

The displacement amount of 1' for the inner key pad 2 can be adjusted to the desired value for the operating stroke and operating load by adjusting the length and thickness 1 width for the arm 2. During molding, the molding material flows into the inner key top 2 through the arm 2 section, so it is necessary to set the arm 2 dimension to prevent short molding. 2 is made thin to obtain a short operating stroke and small operating load.

As the material of the frame 2, resin such as polycarbonate, styrene, polypropylene, etc. may be used.

On the other hand, the outer shape of the reinforcing plate 3 to be inserted is formed by etching, pressing, or other methods from a rigid and highly elastic metal such as stainless steel, phosphor bronze, or brass. The external shape before the insert is as shown in Figure 4. An L-shaped flange 3F facing toward the bottom surface of the calculator is formed on the outer periphery of the reinforcing plate 3. This flange portion is buried in the resin of the frame 2 facing the insert, improving the rigidity of the entire frame and increasing the resistance against twisting and bending. square hole 3
D, 3B is the display device 10.D arranged below. solar cell 9
This serves as a window for viewing the outside of the device. Further, the flange 3F is cut out on the outer periphery near the square hole 3B, and a tongue portion 3F' is formed by applying bending load. This tongue part 3F
' is for lowering frame 2 to the ground potential of the circuit,
It is exposed through a square hole 2H provided at a corresponding position.

The frame 2 to the reinforcing plate 3 shown in FIG. 3 are fixed on one side, and the reinforcing plate 3 is in direct contact with the back surface of the facing sheet 1 during lamination.

A flexible contact sheet 4 is disposed below the frame 2 and has a printed pattern formed on its lower surface to serve as movable key contacts. The contact sheet 4 is made by printing a contact pattern 4a on a thin film such as a polyester film using conductive ink such as carbon paste at a position corresponding to the key manual portion of the frame 2.

This contact pattern 4a is pushed by the inner key top 2 of the frame 2 at ', is displaced downward, and comes into contact with the fixed contact 6a on the upper surface of the printed circuit board 6, which is disposed opposite to it, through the round hole 5a of the insulating spacer 5. do. Keying is performed by short-circuiting the fixed contact 6a due to contact between the contacts.

An LSI 8 forming an arithmetic circuit is mounted on the printed circuit board 6, and key human input signals are guided to the LSI 8. L
The SI 8 performs calculations according to human power, outputs the results or intermediate results to the display 10, and the drive signal for the 0 display 10 to be displayed visually is sent to q via the heat seal connector 11.
'available. Since the LSI 8 and the display lO are operated by a weak current supplied from the solar cell 9 through the heat seal connector 11, the LSI 8 is a C-MO
The S-type display 10 uses an LCD (liquid crystal display) to reduce power consumption.

Further, a tongue piece 6b formed by cutting out the board with a U-shaped slit is formed at a position corresponding to the tongue part 3H of the frame 2 of the printed circuit board 6, and the tongue part 3H and the contact sheet 4 are formed. and are opposed to each other via the notch portions 4b and 5b of the insulating spacer 5.

A circuit ground type (pattern connected to Q) is formed on both sides of the tongue piece 6b.

A relatively thick metal reinforcing plate 7 is adhered and fixed to the frame 2 from the bottom surface of the printed circuit board 6 using an adhesive 7a, thereby forming a contact sheet 4. Insulating spacer 5. By sandwiching the printed circuit board 6, the laminated structure of the device is completed. At this time,
The tongue portion 3F' of the frame 2 presses down the tongue piece 6b of the circuit board 6 and comes into contact with the portion 7b to which adhesive is not applied of the reinforcing plate 7 at the lowest layer, thereby causing the reinforcing plate 7 and the reinforcing plate 3 of the frame 2 to is connected to the circuit ground potential.

FIG. 5 is a cross-sectional view taken along line X-X in FIG. 2, viewed in the direction of the arrow. As shown in FIG. The tongue piece 6b of the circuit board 6 is displaced downward and brought into contact with the reinforcing plate 7.

With this structure, the reinforcing plate 3 is lowered to the ground potential of the circuit, so that static electricity transmitted from the surface of the cover sheet during operation can be released to the metal reinforcing plate 3 and further to the circuit at the ground potential, and the solar cell 9゜Display device lO1 or LSI
8 can be prevented from being applied to the circuitry containing +I-. Moreover, since the reinforcing plate 7 is installed in the same manner, the electrostatic shielding effect can be reduced by 1, and a higher protection effect can be realized.

In addition, as shown in FIG.
Since the solar cell 9 is constructed so as to surround the calculator, it is difficult to deform even when stress such as twisting or bending is applied to the entire calculator, and the solar cell 9 made of a easily damaged material such as a silicon wafer or a glass plate can be protected.

Similarly, as shown in FIG. 6 (a cross-sectional view taken along Y-Y line in FIG. This structure, which requires no force, is effective when using easily damaged displays such as LCDs that hold liquid crystals using glass plates.

Figure 7 shows a cross section taken along the Z-Z line in Figure 2, viewed in the direction of the arrow. Displaced to
Keying is performed by bringing the contact sheet 4 into contact with the printed circuit board 6 and causing the contact pattern 4b to short-circuit the fixed contacts 6a, 6a. As mentioned above, the arm 2 that holds ′ on the inner key top 2 has a thin wall, and the key top 2
Since the key is bent into a snake-like shape to surround the key and has a relatively long effective length of 1 g, the key can be pressed manually with a small pressing force and a short stroke.

In addition, a reinforcing plate 7 with high rigidity and excellent flatness is adhered to one side of the printed circuit board 6, so even if the circuit board 6 is made of a material that is prone to warping or twisting, the flatness can be maintained. Therefore, excellent operability can be achieved without variations in key strokes or operating loads.

Although the calculator has been described as an example in I-, the present invention can also be applied to devices such as electronic translators.

[Effects] As is clear from the explanation in 1- below, according to the present invention, a resin frame insert-molded with a metal reinforcing plate can be used in an electrical device in which a solar cell and a display are exposed to the outside of the device. Since the solar cell and display device are provided with a structure in which the frame surrounds and holds the solar cells and the display device, even if stress such as bending or twisting is applied to the device, it will not easily deform. An excellent city r41 that can effectively prevent damage to solar cells, etc.
We can provide 1 unit.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an electric cell according to the present invention, Fig. 2 is an external perspective view of an electric cell according to the present invention, Fig. 3 is a perspective view showing the structure of the frame of Fig. 1, and Fig. 4 is an exploded perspective view of an electric cell according to the present invention. The figure is a perspective view showing the structure of the reinforcing plate in Fig. 3, Fig. 5 is a sectional view taken along the line x-X in Fig. 2, Fig. 6 is a sectional view taken along the line Y-Y in Fig. 2, and Fig. The figure is a sectional view taken along the Z-Z line in FIG. 2.

Claims (1)

[Claims] An electronic device in which a solar cell and a display unit are exposed to the outside of the device is provided with a resin frame in which a metal reinforcing plate is insert-molded, and a structure is provided in which the frame surrounds and holds the solar cell and display unit. An electronic device characterized by: