Hair clipper with linear actuator
AssigneeAndis Company
InventorsRichard J. Tringali, Jeffrey D. Gross
Life of this patent
Estimating the term…
Abstract
A linear actuator or motor for oscillating a blade is provided. The linear actuator replaces an eccentric drive and yoke, resulting in a linear powered drive to oscillate the blade linearly. This operation facilitates the formation of a smaller and/or lighter hair clipper. The linear actuator uses alternating current to oscillate a permanent against a biasing force produced by a set of springs. The permanent magnet is located opposite a stator with an electromagnetic coil that generates an electromagnetic force to oscillate the permanent magnet.
Claims15
A linear motor for a hair cutting device, comprising:
- a shaft having a longitudinal axis;
- a generally U-shaped bracket having a first leg and a second leg joined by a support rail including an opening, the first leg having a parallel orientation relative to the second leg;
- a permanent magnet extending along an axial axis and coupled to the shaft, the shaft passing through the opening;
- a pair of flat-bar springs coupled to the permanent magnet and the support rail, the springs each extending along a longitudinal axis, wherein a non-zero angle is formed between the longitudinal axis of the shaft and the longitudinal axes of the springs;
- and
- a stator opposite the permanent magnet and comprising an electromagnetic coil, wherein when an alternating current passes through the electromagnetic coil, the shaft oscillates.
A linear motor for a hair cutting device, comprising:
- a bracket;
- a frame removably coupled to the bracket;
- a permanent magnet extending along an axial axis and coupled to a shaft passing through an opening of the bracket;
- a spring directly coupled to the permanent magnet and extending between the permanent magnet and the bracket, the spring extending along a longitudinal axis, wherein a non-zero angle is formed between the axial axis of the permanent magnet and the longitudinal axis of the spring;
- and
- a linear stator coupled to the frame opposite the permanent magnet and comprising an electromagnetic coil, wherein when a current passes through the electromagnetic coil, an electromagnetic force causes the permanent magnet to oscillate linearly along the axial axis and a tip of the shaft to oscillate linearly in a direction parallel to the axial axis.
Dependencies are inferred from the claim text.