A hair cutting device having a cutting unit, the cutting unit including a blade carrier carrying a cutting blade that has cutting teeth; a guard blade that has guard teeth. The blade is movable along the blade carrier relative to the cutting blade within a guard length range between a first guard position corresponding to a shortest hair cutting length of the cutting unit and a second guard position corresponding to the longest hair cutting length of the cutting unit. The blade carrier includes a stop configured to prevent movement of the guard blade past the first guard position and outside of the guard length range, thereby preventing the cutting length from being below the shortest cutting length.

One or more embodiments of a hair cutting device which includes a hair cutting blade and a controller. The hair cutting blade includes a plurality of component blades configured to cut by moving in a first direction. A first component blade of the plurality of component blades is arranged to move independently from another component blade of the plurality of component blades in a second direction which is not parallel to the first direction. The controller is configured to control the hair cutting blade including movement of the first component blade of the plurality of component blades in the second direction.

One or more embodiments of a hair cutting device which includes a hair cutting blade and a controller. The hair cutting blade includes a plurality of component blades configured to cut by moving in a first direction. A first component blade of the plurality of component blades is arranged to move independently from another component blade of the plurality of component blades in a second direction which is not parallel to the first direction. The controller is configured to control the hair cutting blade including movement of the first component blade of the plurality of component blades in the second direction.

A hair clipper is provided, including a chassis having upper and lower chassis portions defining an enclosed interior chamber, said upper and lower chassis portions configured for being secured together; and an outer housing including upper and lower housing portions constructed and arranged for enclosing the chassis as the housing portions are secured together such that the interior chamber is isolated from the housing.

A hair clipper is provided, including a chassis having upper and lower chassis portions defining an enclosed interior chamber, said upper and lower chassis portions configured for being secured together; and an outer housing including upper and lower housing portions constructed and arranged for enclosing the chassis as the housing portions are secured together such that the interior chamber is isolated from the housing.

A haircut recording method, system and device, include a computing device having a feedback unit, and a hand-held device having a hair property measurement unit. The measurement unit is configured to detect a hair property value of interest, such as a hair length representing value, when the measurement unit is arranged adjacent to a haired portion. A position detection unit is configured to detect an actual position of the measurement unit. A record control unit is configured to operate the position detection unit for tracking the actual position of the measurement unit, operate the measurement unit for assigning detected hair property values to position values, deduce a condition parameter, such as a quality parameter, and provide user feedback based on the deduced condition parameter.

A haircut recording method, system and device, include a computing device having a feedback unit, and a hand-held device having a hair property measurement unit. The measurement unit is configured to detect a hair property value of interest, such as a hair length representing value, when the measurement unit is arranged adjacent to a haired portion. A position detection unit is configured to detect an actual position of the measurement unit. A record control unit is configured to operate the position detection unit for tracking the actual position of the measurement unit, operate the measurement unit for assigning detected hair property values to position values, deduce a condition parameter, such as a quality parameter, and provide user feedback based on the deduced condition parameter.

A hair grooming appliance includes a hair grooming device, a drive assembly, and a handle. The drive assembly is coupled to the hair grooming device and configured to drive the hair grooming device. The hair grooming device and the handle are pivotably connected at a hinge and rotate relative to each other about a pivot axis extending through the hinge between an opened position and a closed position.

A hair grooming appliance includes a hair grooming device, a drive assembly, and a handle. The drive assembly is coupled to the hair grooming device and configured to drive the hair grooming device. The hair grooming device and the handle are pivotably connected at a hinge and rotate relative to each other about a pivot axis extending through the hinge between an opened position and a closed position.

A hair length mapping or cutting device uses multiple comb elements to capture bunches of hair as it is traversed across a scalp. The comb elements are traversed away from the scalp to individually measure or cut each bunch of hair to length. Hair may be cut to conform to a hair style mapped, for instance, from an earlier measurement of a hair style.