Improved compositions for use during shaving of hair are disclosed as well as methods that employ such improved compositions for shaving. These improved compositions and methods may help to reduce irritation of skin during shaving, reduce irritation of skin after shaving, increase the lifetime of razors used for shaving and/or decrease the quantity of composition needed for each act of shaving.

A positioning device includes a frame having at least a front frame and one or more side frames; and a plurality of positioning interfaces, the positioning interfaces configured to at least one of transmit signals and receive signals, the signals being configured to at least partially determine at least one of position and orientation of a hair cutting device, the plurality of positioning interfaces positioned at various intervals about the frame. The front frame includes at least one structural feature designed to contact at least one feature of a user's face, and the front frame extends at least partially across said user's face.

A dreadlock grooming device including handle, a cylindrical housing attached to the handle, a power source, and a power control. The cylindrical housing includes a first-semi-arcuate-section and a second-semi-arcuate-section together forming a clamp of the cylindrical housing. The cylindrical housing includes a plurality of serrated blades positioned along an interior surface of the cylindrical housing provided to remove stray hairs from a section of hair within the clamp formed by the first-semi-arcuate-section and the second-semi-arcuate-section during use.

A safety razor removes hair from skin using the cutting blade comprising a sharp edge along an elongated side of a planar surface. An outer comb has a row of outer teeth running along the planar surface on an outside of the cutting blade, each outer tooth is substantially perpendicular to the sharp edge and spaced with a gap between the row of the outer teeth and the planar surface of the cutting blade. Ends of the row of outer teeth comprise outer teeth tips. An inner guard runs along the planar surface on an inside of the cutting blade. The sharp edge of cutting blade is recessed up to a skin surface contour, the skin surface contour defined by the outer teeth tips and an edge of the inner guard. The sharp edge of cutting blade longitudinally bends to cause further recess relative to the skin surface contour.

There is provided an apparatus (100) for determining a location of a personal care device on a user. The apparatus (100) comprises a processor (102) configured to detect a location of one or more parts of the body of a user, detect motions of at least one of the parts of the body of the user induced by the personal care device when the personal care device is in use and determine the location of the personal care device on the user based on the detected motions of the at least one part of the body of the user in relation to the detected location of the at least one part of the body of the user. The processor (102) is configured to acquire images of the user from an imaging sensor (108) directed at the user, and detect the location of the one or more parts of the body of a user and the motions of the at least one part of the body of the user induced by the personal care device from the acquired images of the user.

A shaving and grooming apparatus includes a handle and a cartridge attached to the handle. A plurality of upper blades are positioned in the cartridge, where at least some of the plurality of upper blades include curved tips with a curvature that sufficient to prevent the curved tips from contact a cutting surface during use. A plurality of lower blades is positioned adjacent to the plurality of upper blades in the cartridge, where at least some of the plurality of lower blades comprises curved tips with a curvature that sufficient to prevent the curved tips from contact a cutting surface during cutting. At least one of the plurality of upper and the plurality of lower blades has a thickness and flexibility that results in deflection during cutting that increases effectiveness of cutting action. A drive motor moves the plurality of upper blades relative to the plurality of lower blades.

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.

A replaceable shaving assembly including a blade unit and an interface element configured to removeably connect the blade unit to a handle, on which the blade unit is pivotably mounted, the interface element including a return element configured to provide a return force between the blade unit and handle, the return element including a metal leaf spring.

A trimming assembly for dreadlocks comprises a handle. A cutting head is operatively connected to the handle. The cutting head comprises a cutting head body defining a receptacle at a radial end thereof. The receptacle is structured to receive a dreadlock. A blade protector is positioned axially within the receptacle. A curvature of the blade protector corresponds to a curvature of an inner wall of the receptacle. A blade is interposed between the blade protector and the inner wall. The blade defines a cutting edge at an axial end thereof proximate to the handle. The cutting edge is structured to cut loose hair protruding outwards from the dreadlock as the cutting head is moved along the dreadlock.

The present disclosure relates to a razor cartridge which comprises a frame and one or more cutting members. The frame has a leading longitudinal member and a trailing longitudinal member. The one or more cutting members are arranged between the leading longitudinal member and the trailing longitudinal member. At least one magnetic element is configured and arranged to apply a magnetic field in a magnetic shaving aid comprising a magnetic surfactant and being applied to a skin surface so as to elicit an induced change in the magnetic shaving aid between a pre-shave state and a during-shave state.