| 摘要 |
<p>According to this invention, a key device includes a plurality of coils (L1 to L4) arranged on a printed board (15) having an insertion hole (12) along the longitudinal direction of the insertion hole. One (L4) of the plurality of coils is an electromagnetic induction generating coil connected to a power supply (E), and at least two of the remaining coils are key signal generating coils (L1 to L3). In a key main body (11) which can be inserted/removed into/from the insertion hole, a closed circuit is formed on a printed board. In the closed circuit, a plurality of coils (L1a to L4a) and capacitors (C1a to C4a) arranged between the plurality of coils are formed at positions opposite to the plurality of coils arranged along the longitudinal direction of the insertion hole. A bypass is formed in each of the coils (L1a to L3a) arranged in the key main body, and a coil or coils for specifying a key type by switching operations of jumper line switching sections (J1 to J3) are selected. A key signal or key signals are generated from a key signal generating coil or key signal generating coils opposite to the selected coil or coils. <IMAGE></p> |
