Abstract: The invention relates to an electrically driven device, for example an electric hair removal device, such as a wet or dry shaver, an electric toothbrush or an electric skin treatment device. The electrically driven device comprises a housing having a chassis, wherein the chassis comprises an electric motor having a first drive shaft, a battery unit, and an oscillating body having a second drive shaft. A first longitudinal axis is defined arranged along the second drive shaft, a second longitudinal axis is defined arranged along the first drive shaft, and a third longitudinal axis is defined arranged through the center of the body of the battery unit, wherein the second longitudinal axis and/or the third longitudinal axis are parallel offset to the first longitudinal axis.

Abstract: The present invention relates to cutting body hair such as beard stubble. More particularly, the present invention relates to a cutter system for an electric shaver and/or trimmer, with a pair of cooperating cutting elements with at least one row of comb-like cutting teeth. The cutting elements are movably supported relative to each other by a support structure. At least one of the cutting elements, when viewed in cross section, has a C-shape including a pair of dog-eared holding flanges attached to the support structure and a slightly dome shaped or flat center section. The row of comb-like cutting teeth are formed in a transitional section between the dog-eared holding flanges and the center section. The dog-eared holding flange at the transitional section may be provided with a step-like concave depression forming thinned-out tooth tips.

Abstract: The present invention relates to a cutter system for an electric shaver and/or trimmer. The cutter system includes a pair of comb-like cutting elements with cooperating toothed cutting edges and movably supported relative to each other by a support element, wherein lateral ends of at least one of the cutting elements are provided with lateral protection elements having rounded and/or chamfered edge contours for soft skin engagement. The lateral protection element is integrally formed in one part with the cutting element by an end portion of the cutting element bent away from a skin contact surface thereof and enveloping a gap movably receiving the other cutting element and/or enveloping the support element.

Abstract: A method of gluing a metal part to another part for use in a personal care device such as an electric toothbrush. The method includes steps of providing a metal, such as steel, part, and another, metal, part; treating a surface portion of the metal part with ultra-fast laser pulses having a pulse length in the femtosecond range, e.g., from about 1 femtosecond to about 990 femtoseconds, so that a surface layer of the metal surface is removed; applying an adhesive to the treated surface of the metal part or to a surface of the other part; and gluing the metal part and the other part together.

Abstract: The present invention is concerned with a skin treatment device and an interface for, preferably detachably, attaching a brush to a skin treatment device, wherein the skin treatment device comprises a drive unit, a component part driven by the drive unit to perform a rotatory and/or oscillating movement and a hood at least partially encasing said driven component part. One of said brush and said driven component part comprises at least two protrusions which both extend through openings in the hood when the brush is attached to the skin treatment device. At least one of said protrusions engages the other of said brush and said driven component part by snap fit when the brush is attached to the skin treatment device.

Abstract: The invention relates to a swing bridge for converting a rotary motion into an oscillating motion, especially into a linear oscillating motion, especially within an electrically driven device. The swing bridge comprises an oscillating body defining a plane. The oscillating body comprises a slot arranged in the plane, wherein a first axis extends through the slot perpendicular to the plane, and a drive shaft protruding perpendicular to the plane along a second axis.

Abstract: A method and an apparatus for performing a localization of a movable treatment device having an inertial sensor and configured to treat a target surface. A motion pattern recognition device discriminates between two or more motion patterns contained in a set of motion patterns. An interface provides at least one inertial sensor data from the inertial sensor to the motion pattern recognition device. At least one inertial sensor data represents a movement of the movable treatment device. A neural network is configured to receive the at least one inertial sensor data and to map the at least one inertial sensor data to at least one motion pattern contained in the set of motion patterns associated with one or more different zones of the target surface so that the mapping of the at least one inertial sensor data with the at least one motion pattern indicates an estimation of the location of the device with respect to at least one zone of the target surface.