Hair cutting device

A hair cutting device comprising:

• a suction means;
• and
• a helmet suitable to be placed on the head and defining an inner surface facing said hair when said helmet is worn and said inner surface suitable to face the head while not contacting the head to define a working volume between the inner surface and the head when said helmet is worn;
• wherein said inner surface is counter-shaped to at least part of said head with said hair;
• wherein said helmet comprises closing means comprising a profile extending along a perimeter of the inner surface to deform when in contact with the head;
• wherein said helmet comprises:
• channels each of which defines an inlet section for said hair in said channels, in fluid through communication with the working volume, and a main extension axis substantially radial with respect to said inner surface;
• and
• for each channel cutting means of said hair in said channels defining a cutting direction substantially perpendicular to said main extension axis;
• and
• wherein said helmet comprises a first duct, and a plurality of ducts in fluid through communication with said channels,
• wherein the first duct is connected in fluid through communication to the suction means that is suitable to aspirate air from said channels and the working volume outwards from the helmet to place the channels and the working volume at a pressure lower than that of an environment surrounding the helmet and then to have said channels at pressure lower than that of the environment surrounding the helmet making said hair enter said channels when said blade is in said retracted position while said hair is arranged radially to the head;
• and
• the plurality of ducts each extending between a respective pair of adjacent said channels to put said respective pair of adjacent said channels in fluid through communication;
• the first duct and the plurality of ducts are suitable to place said suction means in reciprocal fluid through connection with said channels and to interconnect said channels so that all said channels are in fluid through communication;
• wherein said cutting means comprise a blade and a movement element of said blade along said cutting direction;
• wherein the channel comprises an opening in which the blade, moved by the element, slides, varying portion of the blade superposing the channel;
• and
• wherein said movement element is suitable to reciprocally move said blade along the cutting direction defining:
• a retracted position wherein the blade is almost entirely outside the channel, and
• a working position wherein the blade protrudes into the channel from the opening suitably almost in contact with the channel on the side opposite said opening performing the haircut, and
• then back to the retracted position.