Electric Razor

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Bucknell Mechanical Design Home


Electric Razor

Figure 1: Conair Electric Razor Before Disassembly
Figure 2: Conair Electric Razor Primary Housing


This electric razor was manufactured by Conair. It is used for personal grooming, such as shaving or trimming of facial hair. It is able to provide a close shave or cut longer hair with included attachments.

How It Shaves

The motor is powered by two AA batteries and turns an offset shaft. The rotation of the offset shaft is translated into only horizontal motion by allowing the offset shaft to move freely within a vertical slit on the blade base mount. This in turn moves the moving blade against a stationary blade to cut hair.

User Requirements

-Shaver is able to cut hair

-Will not cut face

-Long battery life

-Fits into a human hand

-Can trim beards/sideburns


Engineering Specifications

-Hairs cut per pass (%)

-Angle of blade (degrees)

-Motor Efficiency (%) or Battery life (time)

-Fits users grip (% of population)

-Adjustable length (mm)

-Vibration (amplitude)

-Users like it (%)


The table belows lists the components for the Conair Electric Razor:

Table 1: Conair Electric Razor Component List
Part # Part Name Category Function Material Picture
1 Primary Housing Structural Component Provides a mount for all other parts, user holds this part Plastic
2 Electric Motor Input Moves the blade Metal
3 Battery Door Structural Component Covers and holds batteries in place plastic
4 Upper Housing Structural Component Holds taper control switch and serves as a mount for cutting heads Plastic
5 Blade Base Mount Motion Conversion Element Serves as a mount for both blades and converts the motion of the motor output shaft to the side to side motion of the blade Plastic with metal springs
6 Stationary Blade Structural Element Guides hairs to be cut and serves as an anvil for the moving blade Metal
7 Moving Blade Output Cuts the hairs that have been guided by the stationary blade Metal
8 Snap Mount Structural Element The blade base mount or nosehair trimmer snaps into the tabs on this part Metal
9 Screws Structural Holds device together Metal