Keyboard of a membrane contact type
First Claim
1. A keyboard of a membrane contact type comprising:
- (a) a membrane contact unit comprising;
a flexible, insulating, membranous substrate having a movable contact section and a fixed contact section demarcated by a folding line, and folded along said folding line,a plurality of movable contacts formed on one surface of said flexible, insulating, membranous substrate in said movable contact section and divided into a plurality of lateral lines,a plurality of fixed contacts formed on the same surface as said movable contacts in said fixed contact section and divided into a plurality of longitudinal rows,first wiring lines formed in said movable contact section and each connecting the movable contact on each lateral line in series,second wiring lines formed in said fixed contact section and each connecting the fixed contact on each longitudinal row in series,a first terminal section having a plurality of first terminals respectively connected to said first wiring lines, and formed in the vicinity of said folding line,a second terminal section having a plurality of second terminals respectively connected to said second wiring lines, and formed in the vicinity of said folding line,a spacer having openings and placed between said movable contact section and said fixed contact section so that said openings are aligned respectively with said movable contacts and the corresponding fixed contacts; and
(b) a printed wiring board having electronic circuit elements and provided with printed wiring pattern and terminals connected to said plurality of first and second terminals of said membrane contact unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A keyboard of a membrane contact type comprises a membrane contact unit having movable contacts, fixed contacts disposed respectively opposite to the movable contacts, and a printed wiring board having electronic circuit elements and provided with printed wiring lines. The membrane contact unit comprises a flexible, insulating, membranous substrate having movable contacts formed in a movable contact section and fixed contacts formed in a fixed contact section demarcated by a folding line, in the same surface as the movable contacts and arranged symmetrically about the folding line. First and second wiring lines connect the movable contacts and the fixed contacts respectively in a predetermined connecting pattern. A first terminal section having first terminals is connected respectively to the first wiring lines, and a second terminal section having second terminals is connected respectively to the second wiring lines. The first and second terminal sections are formed near the folding line. U-shaped slits are formed in the substrate so as to embrace the extremities of the first and second terminal sections, respectively, so that the first and second terminal sections project from the folded edge of the membranous substrate when the same is folded along the folding line to facilitate electrically and mechanically connecting the membrane contact unit to the printed wiring board.
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Citations
3 Claims
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1. A keyboard of a membrane contact type comprising:
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(a) a membrane contact unit comprising; a flexible, insulating, membranous substrate having a movable contact section and a fixed contact section demarcated by a folding line, and folded along said folding line, a plurality of movable contacts formed on one surface of said flexible, insulating, membranous substrate in said movable contact section and divided into a plurality of lateral lines, a plurality of fixed contacts formed on the same surface as said movable contacts in said fixed contact section and divided into a plurality of longitudinal rows, first wiring lines formed in said movable contact section and each connecting the movable contact on each lateral line in series, second wiring lines formed in said fixed contact section and each connecting the fixed contact on each longitudinal row in series, a first terminal section having a plurality of first terminals respectively connected to said first wiring lines, and formed in the vicinity of said folding line, a second terminal section having a plurality of second terminals respectively connected to said second wiring lines, and formed in the vicinity of said folding line, a spacer having openings and placed between said movable contact section and said fixed contact section so that said openings are aligned respectively with said movable contacts and the corresponding fixed contacts; and (b) a printed wiring board having electronic circuit elements and provided with printed wiring pattern and terminals connected to said plurality of first and second terminals of said membrane contact unit. - View Dependent Claims (2, 3)
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Specification