Patent ID: 7791454

Claim:
An engine starting switch used by a driver to start an engine of a vehicle having a smart ignition function such that the driver is not required to perform any key operation, where the vehicle communicates with a portable device to verify the portable device is within a predetermined area, and where the portable device is provided with power from the vehicle when the smart ignition function is not valid, the portable device including a portable device body having a first end portion and a second end portion shaped differently from the first end portion, the portable device further accommodating a transponder in the vicinity of the first end portion, the switch comprising: an antenna for transmitting a drive radio wave that causes the transponder of the portable device to generate power for establishing communication between the vehicle and the portable device; and a push button operated by the driver, the push button including a concave or convex guide portion engagable with only the first end portion of the portable device body so that the second end portion is not engaged with the guide portion, the guide portion having one or more surfaces, the one or more surfaces being all the surfaces of the guide portion; wherein when the smart ignition function is not valid, the push button is pushed by the driver by engaging the guide portion with the first end portion of the portable device body to shift the engine starting switch to an engine start position and enable the transponder to receive the drive radio wave to generate power and establish the communication between the vehicle and the transponder, thereby starting the engine, wherein when the push button is pushed by the driver by engaging the guide portion with the first end of the portable device, none of the one or more surfaces of the guide portion are moved relative to one another.