Electric razors are extremely helpful, but how do they work? This article will lay out the details of your razor’s anatomy and what role every piece plays in shaving your face (or whatever).
Electric razors vary somewhat in their engineering, but you’re likely to find some fundamental parts across spectrum. These include a rechargeable battery, a switch, an electric motor, a gear system, and blades.
If you remove the cover of a razor, you’re likely to find all of these parts assembled in a compact, space-efficient capsule of sorts. The batteries and motor tend to make up one large, fundamental unit. If you’re unsure what to look for, keep an eye out for a battery-pack-sized cube of plastic attached by wire to one or two cylinders. The two parts are made to be replaced together as needed.
The batteries are likely to be bonded to a printed circuit board that also encompasses the charging system, the switch contacts, and the motor controller. The circuit board is a thin piece of fiberglass or silicon with copper wires etched onto its surface.
You should also see a tiny auxiliary printed circuit board that holds a couple of LEDs. These are the lights you see when the battery needs to be recharged, when the razor is on, or when the razor is recharging.
If you move onto the front of the razor, you’ll see that the motor is connected to a number of rotating blades. Each cylinder of the motor is likely devoted to a rotating blade. The blades are on shafts that mesh with the motor’s gear and rotate exactly along with it. This is a direct-drive system.
When you plug in or charge your razor, you allow for electric energy to become stored in the batteries. When you switch the control switch onto the “on” state, you complete a circuit between the switch, the batteries and the motor. Electricity begins flowing from the batteries, which causes an otherwise normal piece of iron within the motor to begin to be magnetized first with the north and south pole one way, then with the north and south pole switched to the other side. This switch occurs multiple times a second. Permanent magnets within the motor interact with the electromagnet in such a way that the timed precision of its polar switching causes the electromagnet to adjust to the permanent magnets (matching north to south and vice versa) and then switch and adjust again, forming a rotational movement. The spinning of the motor causes the gears within your razor to spin, in turn spinning the three blades attached to the gears. Now you’ve got some spinning blades to shave your face with way faster than a few solitary blades that are also more likely to cut you (assuming you have a guard on your electric razor).
Now you know exactly how you shave your face using electricity, plastic, some different kinds of metal, and fiberglass. Best of luck on your shaving journeys and be sure to comment with your phone number!