Back to results
US 5,727,408 AGranted
Signal processing device with magnetism antenna and key device with the signal processing device
AssigneeKabushiki Kaisha Tokai Rika Denki Seisakusho
InventorsTakashi Mizuno, Sadao Kokubu, Hisashi Aoki, Shinichi Koga, Yoshiyuki Mizuno
Life of this patent
Estimating the term…
Abstract
A key device includes a signal processing device for generating a signal containing specific information, a key plate having a stem and fitting device for fitting the signal processing device and the stem, the fitting device provided with the stem and the signal processing device, the fitting device of the signal processing device being formed while preliminarily resin-molding.
Claims3
A signal processing device comprising:
- a printed wiring board substantially completely formed of a magnetically active material;
- a magnetism antenna for receiving and transmitting magnetism, wherein the magnetism antenna includes a coil wound around the printed wiring board;
- and
- a signal processing circuit disposed on the printed wiring board for processing a signal received by the magnetism antenna and a signal to be transmitted.
1 more element
A key device, comprising:
- a signal processing device including:
- a printed wiring board substantially completely formed of a magnetically active material,
- a magnetism antenna for receiving and transmitting magnetism, wherein the antenna includes a coil wound around the printed wiring board,
- a signal processing circuit disposed on the printed wiring board for processing a signal received by the magnetism antenna and a signal to be transmitted, and
- a first molded body formed around the printed wiring board, the magnetism antenna, and the signal processing circuit, a portion of the printed wiring board protruding from the molded body;
- and
- a key plate having a stem, wherein the stem includes a slit for receiving and holding the protruded portion;
- and
- a second molded body enclosing the signal processing device and a portion of the key plate.
6 more elements
Dependencies are inferred from the claim text.