Abstract: A switch device is provided that ensures formation of a communicable area by a coil antenna. The switch device includes an ignition switch operated by an operator for driving an engine starter, a decorative cap arranged to surround the ignition switch and having an ornamental surface, and the coil antenna arranged adjacent to the decorative cap for transmitting a transponder-driving radio wave. The decorative cap includes a transmittable area that can transmit the transponder-driving radio wave therethrough. The transmittable area is formed in a part of the decorative cap excluding the ornamental surface.

Abstract: A switch device that occupies less space and that can be manufactured at a lower cost. The switch device includes an operation switch operated by an operator for driving an actuator and a coil antenna used to output a transponder-driving radio wave. The coil antenna is arranged adjacent to the operation switch.

Abstract: A portable device that resists deformation caused by an external force while remaining water resistant. The portable device includes a case, which is made of a flexible material. A battery compartment is formed in the case. A separable portion is arranged in the part of the case corresponding to the battery compartment. Part of the case is bent to open the separable portion and expose the battery compartment from the case.

Abstract: An engine switch device with improved convenience. The device starts and stops an engine. The device includes a key cylinder, which has a key slot, and a push button switch, which is pushed to stop or start the engine. The key slot is located in the center of the push button in a preferred embodiment.

Abstract: A thin portable device having high strength. The portable device includes a portable device body for accommodating an electronic component used for communication. The portable device body includes an upper case and a lower case, each having a cavity. A holding frame holds peripheral portions of the upper case and the lower case so that the upper case and the lower case are connected to each other with the cavities opposed to each other.

Abstract: An electronic key system for a vehicle that prevents private information from being available to a third person. The electronic key system includes a terminal, electronic keys, and a device having comparing and control components. Each electronic key stores a distinct identification code and transmits the identification code to the vehicle. At least one of the identification codes is a restriction code for restricting the usage of the terminal. The comparing component is arranged in the vehicle and stores verification codes associated with the identification codes. The comparing component retrieves the identification code of one of the electronic keys and compares the retrieved identification code with an associated one of the verification codes. The control component restricts activation of the terminal when the retrieved identification code is the restriction code.

Abstract: An activation restricting apparatus for an engine starting system that may be produced with a compact size. The apparatus includes an operating mechanism, an actuator, and a control unit. The operating mechanism starts and stops the engine and has a plurality of positions including a LOCK position. The operating mechanism includes a first stopper prohibiting movement of the operating mechanism from the LOCK position and a second stopper prohibiting movement of the operating mechanism to the LOCK position. The control unit enables the engine to be started when the operating mechanism is in the LOCK position and a first ID code sent from a portable device matches a second ID code. The control unit enables the operating mechanism to be moved to the LOCK position when the operating mechanism is not in the LOCK position and the vehicle is not moving.