| 摘要 |
PROBLEM TO BE SOLVED: To protect the communication performance of a communication means from lowering with a key ring inserted into a grip of a key which incorporates the communication means. SOLUTION: An operation knob 1 houses a grip 12 incorporated with a transponder 15 when an ignition key 11 is inserted and is turned toward a key cylinder main body, thereby turning the key 11. Then, the grip 12 is housed into the operation knob 1 when the key 11 is inserted. It is, therefore, possible to protect a drop in the communication performance by a key ring 13 or the like inserted into the grip 12. |
