Release mechanism of a head restraint unit

A head restraint unit comprising:

• a headrest member configured for being fixed to a seat and having a back portion and a first side portion and a second side portion extending therefrom;
• a restraining member formed by one or more parts and pivotally coupled to said first and second side portions so as to allow rotation between a head-restraining position and a standby position of said one or more parts, wherein:
• said headrest member and said one or more parts define together a head restraining loop;
• and
• a path defined by the back portion, side portions and the head restraining member defines a loop directionality;
• at least one retaining mechanism configured for:
• (i) retaining one or more portions of said restraining member for preventing its movement along the loop directionality;
• and
• (ii) releasing said one or more retained portions upon either (a) exceeding of application of a selected releasing tension force on said one or more retained portions to transition to a non-restraining state, (b) identification of extreme maneuver by sensors in the vehicle that are in data communication with the retaining mechanism, (c) or actuation of a releasing mechanism thereof;
• and
• a loop breaking mechanism configured for breaking the loop open upon exceeding of application of a selected force thereon or identification of extreme maneuver by sensors in the vehicle that are in data communication with the loop breaking mechanism, wherein:
• said loop breaking mechanism is constituted by said retaining mechanism;
• and
• said retaining mechanism comprises releasing force adjusting unit configured for allowing adjustment of said releasing force.

A head restraint unit comprising:

• a headrest member having a back portion and first and second side portions extending therefrom;
• a restraining member formed by one or more parts and pivotally coupled to said first and second side portions so as to allow rotation between a head-restraining position and a standby position of said one or more parts, said restraining member extends between two ends and defining a restraining member directionality;
• and
• at least one retaining mechanism characterized by either (i) being formed on one or both of said side portions and configured for retaining one or more portions of the restraining member for preventing its movement along the restraining member directionality, and to perform said pivotally coupling to said first side portion, or (ii) when the restraining member is constituted by a first part that is pivotally coupled to said first side portion and a second part that is pivotally coupled to said second side portion, the retaining mechanism is formed on said first part and is configured for retaining a portion of the second part such that the second part remains in position with respect to the first part;
• wherein:
• said retaining mechanism is configured for releasing the retained portion upon exceeding of application of a selected releasing force on said portion;
• and
• said retaining mechanism comprises releasing force adjusting unit configured for allowing adjustment of said releasing force.