Hair cutting device

A hair cutting device comprising a cutting unit, the cutting unit comprising:

• a blade carrier carrying a cutting blade, the cutting blade comprising cutting teeth;
• a guard blade comprising guard teeth;
• a torsion spring having a coil integrally formed with a first and a second arm extending away from the coil;
• a spring support that supports said torsion spring;
• wherein the cutting blade is arranged to reciprocate with respect to the guard blade such that during use of the device hair trapped between the guard blade teeth and the cutting teeth will be cut;
• wherein the guard 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 predetermined shortest cutting length by the cutting unit and a second guard position corresponding to a predetermined longest cutting length by the cutting unit;
• wherein the torsion spring is configured and arranged to bias the guard blade to the first guard position;
• wherein the blade carrier comprises a stop configured to prevent movement of the guard blade past the first guard position and outside of the guard length range, thereby preventing a cutting length from being less than the shortest cutting length;
• wherein the guard blade is attached to the spring support, the spring support being slidably mounted in a groove formed in the blade carrier.