Lighted pushbutton panel switches

• US 5,399,820 A
• Filed: 06/21/1993
• Issued: 03/21/1995
• Est. Priority Date: 06/21/1993
• Status: Expired due to Term

• Current Assignee: Avid Technology Incorporated
• Original Assignee: Euphonix Incorporated (Avid Technology Incorporated)
• Inventors: Silfvast, Scott W.
• Primary Examiner(s): Luebke, Renee S.
• Application Number:
  US08/080,951
• Time in Patent Office: 638 Days
• Field of Search: 200/54, 200/292, 200/310, 200/313, 200/314, 200/329, 200/341, 200/344, 200/345, 200/315
• US Class Current: 200/314
• CPC Class Codes: H01H 13/023 Light-emitting indicators for multi-layer switches H01H13/83

Abstract

A pushbutton assembly for panel arrays of pushbuttons has a pushbutton assembly comprising an LED extended through a guide bushing and connected to a first printed circuit board. The guide bushing is mounted to the first printed circuit board. A movable cover over the LED has pins extending through guide bores in the guide bushing with an actuator plate mounted to the pins on the opposite side of the first printed circuit board from the cover. A second printed circuit board spaced apart from the first has spring-loaded pushbutton switches mounted thereto, with the spacing such that pressing on the cover activates the pushbutton switch by means of the activator plate. The assembly of two boards may have any convenient array of switches assembled thereon, with the switch signals routed on one board and the driving signals for the LEDs routed on the other. The assembly of printed circuit boards is mounted with the covers protruding through a panel to present an array of lightable switch covers to an operator.

Claims

1. A lightable pushbutton apparatus comprising:

a first printed circuit board having first electrically conductive traces adapted for activating a lighting element;

a bushing element mounted on said first printed circuit board, said bushing element having a central opening for said lighting element;

a translatable cover positioned over said bushing element and having at least one guide extension extending through a guide bore in said bushing element, providing for guided movement of said translatable cover relative to said first printed circuit board;

a second printed circuit board spaced apart from said first printed circuit board and having a spring-loaded switch connected to second conductive traces formed on said second printed circuit board; and

an actuator attached to said at least one guide extension and positioned for operating said spring-loaded switch.

2. An array of lightable pushbuttons adapted for mounting to a control panel, comprising:

a first printed circuit board having first electrically conductive traces adapted for activating lighting elements;

an array of bushing elements mounted on said first printed circuit board, each of said bushing elements having a central opening for one of said lighting elements;

a translatable cover over each bushing element, each cover having at least one guide extension extending through a guide bore in one of said bushing elements, providing for guided movement of each said translatable cover;

a second printed circuit board spaced apart from said first printed circuit board and having an array of spring-loaded switches in a matching array to said array of bushing elements, said spring-loaded switches connected to second electrically conductive traces on said second printed circuit board; and

actuators attached to each of said guide extensions and positioned for operating said spring-loaded switches.

3. An array of lightable pushbuttons as in claim 2 wherein each of said translatable covers comprises a translucent surface over each of said bushings elements.

4. An array of lightable pushbuttons as in claim 2 wherein said guide extensions comprise plural guide shafts from each translatable cover, engaging plural guide bores through said bushing elements, said guide bores arranged radially around said central opening.

5. A control panel having a front face with an array of openings therethrough and an assembly of lightable pushbuttons mounted thereto, said lightable pushbutton assembly comprising:

a first printed circuit board having first electrically conductive traces adapted for activating lighting elements;

an array of bushing elements mounted on said first printed circuit board, each of said bushing elements having a central opening for one of said lighting elements;

a translatable cover over each bushing element, each cover having at least one guide extension extending through a guide bore in a bushing element, providing for guided movement of each said translatable cover;

a second printed circuit board spaced apart from said first printed circuit board and having an array of spring-loaded switches in a matching array to said array of bushing elements, said spring-loaded switches connected to second electrically conductive traces on said second printed circuit board; and

actuators attached to each of said guide extensions and positioned for operating said spring-loaded switches.

6. A control panel as in claim 5 wherein each of said translatable covers comprises a translucent surface over each of said bushings elements.

7. A control panel as in claim 5 wherein said guide extensions comprise plural guide shafts from each translatable cover, engaging plural guide bores through said bushing elements, said guide bores arranged radially around said central opening.

8. A method for separating electrical circuitry for a lighting element from electrical circuitry for switch contacts in a lightable pushbutton array, comprising the steps of:

forming first circuitry adapted for powering said lighting elements on a first printed circuit board;

forming second circuitry for sensing operation of said switch contacts on a second printed circuit board adapted for mounting spring-loaded switches thereto;

mounting a guide bushing to said first printed circuit board, said guide bushing having a central opening for said lighting element and at least one guide bore therethrough;

spacing said first and said second printed circuit boards apart and substantially parallel;

placing a translatable cover over said guide bushing, the translatable cover having a guide extension extending through said guide bore and terminating in an actuator positioned to operate said spring-loaded switch.