Switch assembly for a portable radio

US5746307A · kind A · utility

Assignee

• Motorola, Inc. · US

Inventors

• Steve M. Joss · Pompano Beach, US
• Tyler David Jensen · San Diego, US
• Laurence E. Marvet · Sunrise, US
• Julio C. Castaneda · Coral Springs, US
• David Auld · Melbourne, AU
• Steven J. Finch · Sunrise, US

Key dates

• Filing date: Apr 7, 1997
• Grant date: May 5, 1998
• Expiry date: Apr 7, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M1/0202
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The PTT assembly (100) self locates and then locks a back support plate (106) and switches (146, 148) directly to an inner surface (134) of a housing wall (132). On the outer surface (136) of the housing wall (132), keypad plungers (116) self locate through holes (140) in the housing wall. The perimeter of the keypad itself is retained by a bezel (110) that snaps into the housing (132). A hook (130) extends from the bezel (110) to lock and fix the travel distance of the plungers (116) to the switches (146, 148). With the back support plate (106) firmly in place, the keypad actuation force remains consistent since the travel distance of the plungers (116) to the switches (146, 148) is fixed by the hook (130) length. Additionally, the back support plate (106) supports the switches without bowing under the applied plunger force further ensuring a consistent actuation force.