Personal hygiene device

US10881193B2 · kind B2 · utility

Assignee

• The Braun Corporation · DE

Inventors

• Norbert Schaefer · Frankfurt am Main, DE
• Martin Haas · Belgrade, US
• Andreas Kramp · Bad Camberg, DE
• Robert Schäfer · Frankfurt, DE

Key dates

• Filing date: Oct 12, 2018
• Grant date: Jan 5, 2021
• Expiry date: Feb 14, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C17/3445
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A personal hygiene device has a handle, a treatment head, and a motor carrier disposed in the handle. The motor is pivot-mounted against at least one spring element arranged between the handle and the motor carrier. The motor has a stator portion fixedly mounted at the motor carrier and an armature portion spring mounted at the motor carrier to allow a motion relative to the motor carrier. The armature portion is coupled with a drive shaft connected with the treatment head for transferring motion thereto, wherein an external treatment force acting on the brush head leads to pivoting of the motor carrier relative to the handle. The motor has a motor permanent magnet and a coil for providing an alternating electromagnetic field interacting therewith to excite an oscillating motion of the drive shaft. A Hall sensor is fixedly mounted to the handle or to the motor carrier; and a sensor permanent magnet is fixedly mounted to the other one of the handle and motor carrier, so that a pivoting motion of the motor carrier leads to a relative movement between the sensor permanent magnet and the Hall sensor.