Electric shaver
An electric razor is a battery powered, often rechargeable, personal care device that shaves and trims facial hair. The unit consists of a housing that acts as a handle. Within a housing is an electric motor that operates the razor. A switch on the outside of the razor turns it on or off. At one end of the razor is a cover that holds a screen, called the foil, in place.
Blades
The foil is the part of the razor that comes in contact with the skin. Beneath the foil are three rotary blades. They're circular in form with multiple radiating spokes that each have a small cutting edge. Each blade rests on a spindle. The spindle is held in place on the blade by a spring, which allows the blade to follow the contours of the face.
Trimmer
The trimmer portion of the razor consists of a tab that pops out from the handle. A toothed blade that vibrates back and forth faces against a fine metal comb that provides a scissor effect to trim hair. The motor drives the vibrating blade.
Motor and Drive Assembly
The motor spins a shaft that drives a small gear. This gear drives a larger gear with an offset shaft on one side that drives a lever side to side to operate the trimmer mechanism. The same gear also drives the gear assembly that turns the blades of the razor.
Cutting Action
The blades of the razor never touch the skin itself. When the razor is placed against the skin, facial hairs poke through the holes in the foil. The razor clips the hairs. Moving the razor around the skin of the face effectively trims the hairs until a close, smooth shave is completed.
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