Rubber contact switch

• US 5,659,161 A
• Filed: 05/21/1996
• Issued: 08/19/1997
• Est. Priority Date: 05/23/1995
• Status: Expired due to Term

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Oshima, Tsuyoshi, Nishijima, Masataka, Nishitani, Keizo, Takanohashi, Daisuke
• Primary Examiner(s): Hecker, Stuart N.
• Application Number:
  US08/650,999
• Time in Patent Office: 455 Days
• Field of Search: 200/5 A, 200/517, 219/92
• US Class Current: 200/5.00A
• CPC Class Codes: H01H 23/025 Light-emitting indicators
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 2201/10424 Frame holders
• CPC Class Codes: H05K 2201/10575 Insulating foil under component permanent spacer or stand-off H05K2201/2036
• CPC Class Codes: H05K 2201/10651 Component having two leads, e.g. resistor, capacitor
• CPC Class Codes: H05K 3/281 by means of a preformed insulating foil H05K3/284 takes precedence
• CPC Class Codes: H05K 3/301 by means of a mounting structure H05K3/325 takes precedence
• CPC Class Codes: H05K 3/306 Lead-in-hole components, e.g. affixing or retention before soldering, spacing means H05K3/32 takes precedence

Abstract

In a rubber contact switch in which ends of lead lines of an LED extend to the rear surface of a printed board through holes of a rubber contact sheet to be soldered on the printed board, a recessed portion is formed in the peripheral portions of the holes on the rear surface of the rubber contact sheet, and heat generated by soldering of the lead lines is prevented from being directly transmitted to the rubber contact sheet.

Claims

1. A rubber contact switch comprising:

a printed board;

a rubber contact sheet arranged on said printed board;

a key top supported on a shaft to be oscillated;

a pressing member, having an upper end being in contact with said key top, which presses said rubber contact sheet depending on oscillation of said key top to turn on/off said switch; and

an LED with a lead line for illuminating said key top, the lead line having an end extending to the rear surface of said printed board through a hole formed in said rubber contact sheet and being soldered on said printed board,

characterized in that a recessed portion is formed in a peripheral portion of the hole on the rear surface of said rubber contact sheet.

2. A rubber contact switch according to claim 1, wherein a projection portion is formed on the peripheral portion of the hole on the upper surface of said rubber contact sheet.

3. A rubber contact switch according to claim 2, wherein the hole is formed to have an inverted-trapezoidal vertical section in such a manner that the diameter of the hole decreases downward.

4. A rubber contact switch according to claim 2, wherein the inner peripheral portion of the upper end of the hole is chamfered.

5. A rubber contact switch according to claim 4, wherein the hole is formed to have an inverted-trapezoidal vertical section in such a manner that the diameter of the hole decreases downward.

6. A rubber contact switch according to claim 1, wherein the inner peripheral portion of the upper end of the hole is chamfered.

7. A rubber contact switch according to claim 3, wherein the hole is formed to have an inverted-trapezoidal vertical section in such a manner that the diameter of the hole decreases downward.

8. A rubber contact switch according to claim 1, wherein the hole is formed to have an inverted-trapezoidal vertical section in such a manner that the diameter of the hole decreases downward.