Hair styling device

A hair styling device comprising:

• a shoulder;
• first and second arms, wherein at least the first arm is pivotally coupled to the shoulder, such that the arms are moveable between an open position in which hair can be introduced between the arms and a closed position in which the hair is clamped between the arms, at least one of the arms having a heater for heating hair that contacts a hair contacting surface of the heater;
• and
• spring means configured to bias the arms into the open position;
• wherein the spring means acts on a cam surface of the first arm such that an actuation force required to move the arms from the open position to the closed position is regularised between the open and closed positions.

A hinge joint comprising:

• a shoulder;
• first and second arms, wherein at least the first arm is pivotally coupled to the shoulder such that the at least the first arm is moveable between an open position and a closed position;
• and
• spring means with a first end acting on the first arm and a second end acting on the second arm for biasing the arms in the open position,
• wherein the first arm comprises a cam surface and the spring means acts on the cam surface.