Patent ID: 9257240
Filing Date: 2016-02-09
CPC Classification: H01H

Claim Text:
1. An electronic device comprising: a key assembly disposed such that a part thereof is extending into and disposed within the interior of the electronic device; a switch device disposed within the interior of the electronic device to perform an electric switching operation in response to a force exerted on the key assembly, wherein the key assembly includes a key body of resilient elastic materials and contact projections, each of the contact projections which is protruded and formed in a direction extending from a lower surface of the key body towards the switch device and wherein the key body is installed such that a contact surface of each of the contact projections is in contact with the switch device and wherein each of the contact projections includes a lower surface that is pushed back toward the lower surface of the key body and elastically deformed by a certain predetermined distance by the switch device, the contact projections biasing the key assembly toward an unactuated position; and a hollow cavity formed within each of the contact projections, wherein the contact surface of each of the contact projections is elastically deformed by force from the switch device a predetermined distance, wherein the predetermined distance is equal to a wall thickness of each of the contact projections formed between the hollow cavity and the switch device.