JPS583232Y2 - keyboard - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a touch switch type keyboard used as an input device for various information processing devices.

This keyboard has contact patterns for various keys on opposing surfaces of a lower printed board that is mounted on a base and is stationary, and an upper printed board that can be elastically displaced relative to the lower printed board. The insulating sheet interposed between both printed boards is provided with an opening at a part corresponding to the contact pattern, and by pressing the upper printed board, the contact pattern of the upper printed board is lowered. It is designed to make contact with the contact pattern on the printed board on the side.

However, since the displacement of the upper printed board is set to a very small amount so that it can be easily operated with extremely weak pressing force, and the insulating sheet is made sufficiently thin, the gap between the upper and lower printed boards at the opening is very small. be.

Therefore, in a long key such as a ground key, the contact pattern may unintentionally come into contact with the contact pattern on the lower printed board due to bending of the upper printed board, etc.
There is a great possibility that false signals will be generated.

Therefore, the object of the present invention is to provide a keyboard in which the contacts of long keys are accurately maintained in the open position unless the upper printed board is pressed, and the contacts are reliably closed no matter where on the top of the key 1 is pressed. It's about providing structure.

. Hereinafter, the keyboard of the present invention will be explained with reference to the drawings. The outer peripheral edge of the contact pattern of the upper printed board 4 is supported by the inwardly protruding piece 3.

In the illustrated embodiment, an insulating sheet 1 made of a mylar sheet is adhered to a lower printed board 6 made of glass epoxy resin as a base material with an adhesive 7, as shown in FIG. 1, an upper printed board 4 and a printed cover 8 made of polyester resin are laminated, and their outer peripheral edges are inserted into the receiving grooves 10 of the underframe board 9 as shown in FIG. It is fully fixed.

On the upper surface of the print cover 8, various key tops 11 are displayed by printing or the like in areas corresponding to the contact patterns, with or without required characters and symbols.

Key top 11 of the ground key with no letters or symbols a Tor Key top 11 of the 5HIFTJ key
b is longer and narrower than the other key tops 11, so in the opening 2a of the insulating sheet corresponding to the key top 11a, five rectangular inward protruding pieces 3 are cut at equal intervals and vertically facing each other. That's what's left.

In the opening 2b corresponding to the key top 11b, two similarly rectangular inward protruding pieces 3 are provided, vertically facing each other.

The contact patterns 5a and 5b of the upper printed board corresponding to the elongated key tops 11a and 11b have almost the entire length in the center so that the contacts are closed no matter which part is pressed along the length. The conductor portion 12a,
12 b.

Each contact pattern 13, 13a of the lower printed board 6,
The entire surface of 13b is a conductor.

By manually operating this keyboard and inputting information to the information processor connected to it, by pressing the required key tops of the print cover 8, the upper printed board 4 is elastically displaced downward through the opening of the insulating sheet 1. Then, the contact pattern may be brought into contact with the contact pattern 13 of the lower printed board.

As described above, in the Kinihode of the present invention, the inward protruding pieces 3 are provided on the inner peripheral edges of the long key openings 2 a and 2 b formed in the insulating sheet 1, and the corresponding long openings 2 a and 2 b are provided on the upper printed board 4 . The outer periphery of the contact patterns 5a, 5b is supported by the inward protruding piece 3, and a part of the upper printed board 4 is displaced toward the lower printed board 6 due to bending or other causes. A contact that is not pressed in any way will not close unintentionally and provide an erroneous input signal to the information processing device.

That is, according to the present invention, a keyboard with excellent operational reliability and stability can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is a partially cutaway front view of the keyboard, Fig. 2 is an enlarged sectional view of the main body of the keyboard, and Fig. 3 shows the keyboard main body and its base. FIG. 4 is an enlarged front view of the main part of the insulating sheet, FIG. 5 is an enlarged front view of the main part of the upper printed board, and FIG. 6 is an enlarged front view of the main part of the lower printed board. Enlarged front view of
7 and 8 are enlarged views of the contact pattern. 1...Insulation sheet), 2, 2 a, 2 b・
...Opening, 3...Inward protruding piece, 4...
......-Upper printed board I/board, 5... Contact pattern of upper printed board, 6... Lower printed board, 8... Print cover, 9・・・・・・
Underframe board, 11. lla. 11 b...Key top, 13.13 a,
13 b...Contact pattern on the lower Phnom board.

Claims (1)

[Scope of utility model registration request] The lower printed board is stationary and is displaced relative to this.
Contact patterns for various keys are provided at corresponding locations on the opposing surfaces of the - side printed board, and an insulating sheet interposed between the upper and lower printed boards has openings at locations corresponding to the contact patterns. In the keyboard, in which the corresponding contact patterns of the upper and lower printed boards are brought into contact through the openings by pressing the upper printed board, the inner peripheral edge of the opening provided in the insulating sheet for the elongated key has 1 A keyboard comprising one or more inwardly protruding pieces provided at intervals, and the outer peripheral edge of a contact pattern on an upper printed board is supported by the inwardly protruding pieces.