JPS598399Y2 - Electronics - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to electronic equipment, and particularly to earthing of an exterior case.

Conventionally, in order to prevent the influence of external noise on the electronic circuits in electronic devices, the outer case was made conductive so that the potential of the outer case became the reference potential of the electronic circuit, that is, the ground potential. .

For example, the electronic device was constructed as shown in FIG. 1, which is an exploded perspective view.

In the figure, a metal decorative case 1 is configured to be short-circuited to a ground electrode 8 of a printed circuit board 7 via a coil spring 6 that passes through holes 4 and 5 provided in a keyboard frame 2 and a conductive rubber plate 3. Ta.

Such a precept is used when assembling electronic equipment using coil springs 6.
This was not desirable in terms of parts management, as it required the work of inserting the parts and the number of parts in the electronic equipment.

The present invention takes the above points into consideration and provides an electronic device with an improved number of parts and workability.

FIG. 2 shows a sectional view of an electronic device, such as a computer, according to the present invention.

In the figure, reference numeral 9 denotes an exterior case, which is made of a metal member or a conductive member coated on the surface thereof.

Reference numeral 10 denotes a keyboard frame, which is provided with through holes 12 so that key tops 11 for numerical values, commands, etc. are arranged at predetermined positions, and through holes 13 for passing through conductive rubber, which will be described later.

Reference numeral 14 denotes a rubber plate, the portion facing the above-mentioned key top 11 is shaped like a bell, and a conductive rubber 15 is attached to the inner surface of the rubber plate.

Reference numeral 16 denotes a printed circuit board, on which electrodes (not shown) are provided so as to be short-circuited by the conductive rubber 15.

Reference numeral 17 is a conductive polymer compound member, for example, conductive rubber, which is embedded in the through hole 12 provided in the rubber plate 14, is integrated with the rubber plate 14, and is connected to the ground electrode (or reference potential) provided on the printed circuit board 16. ),
Further, the keyboard frame 10 has a shape such that it comes into contact with the exterior case 9 through a through hole 13 provided in the keyboard frame 10 .

Therefore, electronic equipment can be assembled more easily than before.

In the above explanation, the rubber plate is provided with conductive rubber, but if the rubber plate is made of conductive rubber, the conductive rubber 1
6, a rubber plate and an integral oval shape.

Further, in the above example, the conductive rubber contacts the exterior case through the hole in the keyboard frame, but this may not be the case.

By taking precautions as described above, the outer case can be easily grounded (reference potential).

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional electronic device, and FIG. 2 is a sectional view of an electronic device according to the present invention. 17... Conductive rubber.

Claims (1)

[Scope of utility model registration request] A conductive exterior case, a printed circuit board on which an electrode is mounted, and a circuit board for opening and closing the electrode on the printed circuit board,
A rubber sheet for normally holding the contact above the electrode, and a conductor portion integrally provided on the rubber sheet and serving as a reference potential of the exterior case and the printed circuit board for short-circuiting the exterior case and the printed circuit board. and an electrically conductive polymer compound that is sandwiched and pressed between the electronic devices.