Keypad assembly for a portable electronic device
US8822861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2011 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Sep 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A friction device, keypad assembly and portable electronic device are disclosed. In one embodiment, there is provided a keypad assembly for a portable electronic device, comprising: a keypad having a number of keys each having an actuator post attached to a back side thereof; a circuit board; a light guide located between the keypad and the circuit board, the light guide defining a number of holes which provide paths for respective actuator posts to travel through to contact respective electrical switches on the circuit board; and at least one friction device located in one of the holes of the light guide, the friction device providing a physical barrier limiting movement of the actuator post in a direction normal to a direction of actuation, the friction device applying friction to at least one side of the actuator post and resisting movement of the actuator post in the direction of actuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.