A housing 12, a resonance drive actuator 20 having a rotor 24 having a first moment of inertia Jr and a stator 22 having a second moment of inertia Js, and a first plurality of leaf spring elements having a first spring constant krh. 60, each leaf spring element of the first plurality of leaf spring elements 60 is connected to the housing 12 and the rotor 24, and each leaf spring element of the first plurality of leaf spring elements 60 is connected to the rotor. Each leaf spring element of the second plurality of leaf spring elements 62 extends radially from 24 to the housing 12, is connected to the housing 12, engages the stator 22, and has a first spring constant krh. And the second spring constant ksh is sufficiently equal to the ratio between the first moment of inertia Jr and the second moment of inertia Js, and as a result the torque transmitted to the housing 12 during operation. A personal care device that is designed to be almost free.筐体12と、第1の慣性モーメントJrを持つロータ24及び第2の慣性モーメントJsを持つステータ22を持つ共振駆動アクチュエータ20と、第1のばね定数krhを持つ第1の複数の板ばね要素60と、を有し、第1の複数の板ばね要素60の各板ばね要素は、筐体12及びロータ24に接続され、第1の複数の板ばね要素60の各板ばね要素が、ロータ24から筐体12へと径方向に延在し、第2の複数の板ばね要素62の各板ばね要素は、筐体12に接続され、ステータ22と係合し、第1のばね定数krhと第2のばね定数kshとの比は、第1の慣性モーメントJrと第2の慣性モーメントJsとの比と十分に同等であり、その結果として動作の間に筐体12に伝達されるトルクがほぼ無いようにされた、パーソナルケア装置。