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US 12,128,573 B2Granted
Electrically driven device
AssigneeBraun GmbH
InventorsTiandong Guo, Xinwu Lai, Kejin Li, Detlef Gleich, Uwe Fischer, Bernd Stassen
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AssigneeBraun GmbH
InventorsTiandong Guo, Xinwu Lai, Kejin Li, Detlef Gleich, Uwe Fischer, Bernd Stassen
Estimating the term…
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.
An electrically driven device comprising a housing and a chassis, wherein the chassis comprises a plastic skeleton for receiving an electric motor having a first drive shaft, a battery unit, a printed circuit board (PCB) and an oscillating body having a second drive shaft to drive a cutter unit upon movement of the oscillating body, wherein a first longitudinal axis is defined along the second drive shaft, wherein a second longitudinal axis is defined along the first drive shaft with the second longitudinal axis passing through the oscillating body, and a third longitudinal axis is defined through a center of a body of the battery unit, the second longitudinal axis and the third longitudinal axis are parallel and offset to the first longitudinal axis and the second longitudinal axis is offset from the third longitudinal axis, wherein the oscillating body has a corner section and the second drive shaft is located in the corner section, wherein the second drive shaft extends from a side of the oscillating body nearest to the cutter unit and opposite to a side of the oscillating body nearest to the electric motor, wherein the electric motor comprises a drive pin rotatable eccentrically about the second longitudinal axis, wherein the oscillating body comprises an elongated hole for receiving the drive pin, the elongated hole having a smaller widening in a direction of oscillation of the oscillating body.
An electrically driven device comprising a housing and a chassis, wherein the chassis comprises a plastic skeleton for receiving an electric motor having a first drive shaft extending in a first direction, a battery unit, a printed circuit board (PCB) and an oscillating body having a second drive shaft, wherein the chassis is provided with openings or cavities for receiving the electric motor and the battery unit side by side in a second direction transverse to the first direction and is provided with the printed circuit board (PCB) at a lateral side, also side by side to one of the electric motor and the battery unit, wherein the battery unit is located between the printed circuit board (PCB) and the electric motor, and an axis perpendicular to the first drive shaft of the electric motor passes through the first drive shaft of the electric motor, the battery and the printed circuit board, wherein a first longitudinal axis is defined along the second drive shaft, a second longitudinal axis is defined along the first drive shaft and a third longitudinal axis is defined through a center of a body of the battery unit, wherein the first longitudinal axis is between the second and third longitudinal axes, and wherein the oscillating body and the second drive shaft move with a linear oscillating motion.
An electrically driven device comprising a housing and a chassis, wherein the chassis comprises a plastic skeleton for receiving an electric motor having a first rotary drive shaft, a battery unit, and an oscillating body having a main body portion and a second drive shaft extending away from the main body portion and toward a cutter unit to drive the cutter unit upon movement of the oscillating body, the oscillating body having a corner section and the second drive shaft is located in the corner section, wherein a first longitudinal axis is defined along the second drive shaft, wherein a second longitudinal axis is defined along the first drive shaft with the second longitudinal axis passing through the oscillating body, and a third longitudinal axis is defined through a center of a body of the battery unit, wherein the second longitudinal axis and the third longitudinal axis are parallel and offset to one another, wherein the electric motor comprises a drive pin rotatable eccentrically about the second longitudinal axis, the drive pin engaging a hole in the main body portion to cause oscillating movement of the main body portion, the second drive shaft moving in the same direction with the main body portion hole during oscillating movement of the main body portion.
Dependencies are inferred from the claim text.