To provide a door handle device which has high detection sensitivity and reduces influence of noises from ambient environment, and also to provide a door member equipped with the same, and further to provide a keyless entry system equipped with the same.
The door handle device 11 is provided with a door handle 11 for opening/closing a door 13, a piezoelectric sensor 15 which is deformed based on displacement of the door handle 11, a control circuit 17 for detecting contact of a person or an object with the door handle 11 based on an output signal of the piezoelectric sensor 15 and at least one of opening operation of the door handle 11 and closing operation of the door handle 11, a circuit case 51 comprising a magnetic material which covers the control circuit 17, and an earth connective means 52 which connects the circuit case 51 with the control circuit 17. The door handle device 11 reduces capacitance change due to disturbance and influence of electric noises.
KASAI ISAO
Hiroki Naito
Daisuke Nagano