Patent ID: 8110758
Filing Date: 2012-02-07
Classification: H01H

Abstract:
1. A mode dial mechanism used for an electronic device, the mode dial mechanism comprising: a rotary member comprising a main body with a bottom, a shaft portion connecting the main body and the electronic device, and a contact portion located at the bottom of the main body with an inclined surface; and a pressure detection module electrically coupled to the electronic device and located under the rotary member, with the pressure detection module comprising a button portion which is movable vertically, with the button portion contacting the contact portion; when the rotary member is rotated, the contact portion pushes the button portion of the pressure detection module, and the pressure detection module outputs a signal according to a moving distance of the button portion; wherein the pressure detection module comprises: a containment casing having a outside top surface close to a bottom surface of the contact portion and having a hole; an action element comprising a slab with a side removably received in the containment casing, wherein the button portion, which is located on the top surface of the slab, passes through the hole and touches the bottom surface of the contact portion; an elastic electric member comprising a fringe rod disposed around the lateral surface of the slab and a rebounding portion formed by bending an end of the fringe rod and which touches an inside bottom surface of the containment casing; a resistance member disposed within a side of the containment casing and touching the fringe rod of the elastic electric member; when the button portion is pressed, which causes the slab to descend, a contact position between the fringe rod and the resistance member differs such that a corresponding resistance value is generated; and a conductive member disposed within a side of the containment casing different from the side where the resistance member is located and touching the fringe rod of the elastic electric member, wherein three lateral surfaces of the action element have a groove, and wherein the fringe rod of the elastic electric member is an U-shaped metal rod that connects to the groove.