Head restraint with two wing elements

1. A head restraint comprising:

a main element; and

two wing elements,

wherein each wing element is fitted on the main element by at least two hinges so as to be rotatable about a vertical axis corresponding to the wing element,

wherein each of the at least two hinges of a respective one of the wing elements has a rotation axis on the vertical axis corresponding to the wing element,

wherein each hinge comprises a pin and a recess,

wherein each of the recesses is configured to receive a corresponding one of the pins,

wherein each of the pins and the recesses is provided in the form of a truncated cone,

wherein each of the wing elements has two parts,

wherein each of the two parts is provided with a corresponding one of the pins of the hinge,

wherein the main element is provided with the recesses for receiving the pins,

wherein the two parts of each wing element are configured to be fitted together while or after the pin of one of the two parts is inserted into the corresponding recess of the main element.

2. The head restraint as claimed in claim 1 , wherein an axial stop is provided to prevent the pin from slipping out of the recess.

3. The head restraint as claimed in claim 1 , wherein a securing mechanism is provided between the two parts.

4. A method for fitting a wing element on a main element in a head restraint, comprising:

fitting two parts of the wing element on the main element through at least two hinges so as to be rotatable about a vertical axis corresponding to the wing element,

wherein each hinge comprises a pin and a recess and has a rotation axis on the vertical axis corresponding to the wing element,

wherein each of the two parts is provided with a corresponding one of the pins; and

connecting the two parts together while or after fitting the two parts on the main element.