A brush includes a housing and a brush head. The brush head is slidably engaged with the housing to vary a bristle density of the brush head.

A cleaning device includes a bristle bundle and a handle. The handle has a tubular structure and includes a straight part and a bent part, and the bent part is located at the end of the straight part. The bristle bundle is detachably placed in the tubular structure of the handle, and one end of the bristle bundle extends out of the bent part.

A cleaning device includes a bristle bundle and a handle. The handle has a tubular structure and includes a straight part and a bent part, and the bent part is located at the end of the straight part. The bristle bundle is detachably placed in the tubular structure of the handle, and one end of the bristle bundle extends out of the bent part.

An improvement of hair brush structure includes a brush head, a handle, and an adjustment device interconnected to the brush head and the handle. A repeated rotation of the adjustment device causes changing an appearance of the hair brush.

An improvement of hair brush structure includes a brush head, a handle, and an adjustment device interconnected to the brush head and the handle. A repeated rotation of the adjustment device causes changing an appearance of the hair brush.

A computer-implemented method of training a user to effectively apply makeup using a computerized makeup brush, the method comprising the steps of receiving, from a makeup brush movement tracking system that comprises one or more sensors for sensing the movement of the makeup brush relative to a particular portion of a user's body, data representing a movement of the makeup brush relative to the particular portion of the user's body over a particular period of time as the makeup brush is used to apply makeup brush to the particular portion of the user's body, and using the data to generate and display, to a user, a visual representation of the movement of the makeup brush over the particular period of time on a suitable display (e.g., while providing appropriate visual or audio feedback on the user's performance in applying makeup and/or proper makeup application techniques).

The invention takes advantage of an elasticity of brush bristles and an axial movement of the brush assembly with respect to a brush housing to configure the brush in a retracted or an expanded position. The brush with retractable bristles allows for both an easy removal of hair and/or debris on the bristles simply by the axial movement of the brush assembly and a replacement of the brush bristles when the brush bristles are damaged or dirty. The brush with retractable bristles is configured to be used with an electric tool which enables a rotation of the brush.

The invention takes advantage of an elasticity of brush bristles and an axial movement of the brush assembly with respect to a brush housing to configure the brush in a retracted or an expanded position. The brush with retractable bristles allows for both an easy removal of hair and/or debris on the bristles simply by the axial movement of the brush assembly and a replacement of the brush bristles when the brush bristles are damaged or dirty. The brush with retractable bristles is configured to be used with an electric tool which enables a rotation of the brush.

The present invention is concerned with a hair brush. The hair brush has an elongate profile defining a first longitudinal axis, and has a handle portion in the form of a stick sharing the first longitudinal axis and provided with a proximal end and an distal end, and the hair brush further has a utility portion extending from the distal end of the handle portion for engaging the hair and the scalp of a user during use. The utility portion has a first floating finger and a second floating finger forking off from the distal end of the handle portion and arranged at opposite lateral ends of thereof, and at least one third floating finger arranged between the first and second floating fingers. At least one or both the first and second floating fingers are free of brushing members.

The present invention is concerned with a hair brush. The hair brush has an elongate profile defining a first longitudinal axis, and has a handle portion in the form of a stick sharing the first longitudinal axis and provided with a proximal end and an distal end, and the hair brush further has a utility portion extending from the distal end of the handle portion for engaging the hair and the scalp of a user during use. The utility portion has a first floating finger and a second floating finger forking off from the distal end of the handle portion and arranged at opposite lateral ends of thereof, and at least one third floating finger arranged between the first and second floating fingers. At least one or both the first and second floating fingers are free of brushing members.