Inclinable headrest

A headrest of inclinable type, comprising:

• a body of the headrest;
• a headrest stay having a base portion disposed within said body of the headrest, and a pillar portion extending from said base portion and projecting outwardly from said body of the headrest;
• a ratchet-type inclination adjustment mechanism provided within said body of the headrest, said ratchet-type inclination adjustment mechanism being operable for adjustment of forward and rearward inclination of the headrest, and including:
• a base bracket so formed in a substantially “U” shape in cross-section to have a base wall connected with said body of the headrest, and a pair of first and second side walls extending from said base wall, such that said base wall and said pair of first and second side walls define an inner space in said base bracket,
• said base bracket being rotatably connected with said base portion of said headrest stay;
• a ratchet gear fixed to said base portion of said headrest stay so as to be disposed in said inner space of said base bracket;
• a lock gear disposed in said inner space of said base bracket so as to be movable for engagement and disengagement with and from said ratchet gear;
• said first side wall of said base bracket having:
• an inner surface facing to said lock gear;
• and an outer surface facing outwardly of said base bracket;
• a tension spring element adapted for normally biasing said lock gear into engagement with said ratchet gear,
• said tension spring element including:
• a body portion;
• a first connecting region bent from said body portion to extend in one direction;
• a first anchor end region integral with said first connecting region;
• a second connecting region bent from said body portion to extend in a same direction with said one direction in which said first connecting region extends;
• a second anchor end region integral with said second connecting region, said second anchor end region extending in a direction opposite to a direction in which said first anchor end region extends;
• a connecting hole formed in said lock gear, said connecting hole being of such a size that allows both said first connecting region and first anchor end region of said tension spring to be inserted therein, while allowing said first anchor end region to be hookingly connected therewith;
• an opening defined in said first side wall of said base bracket at a point where said first connecting hole of said lock gear exists, said opening being of such a large size that allows a whole of said connecting hole of said lock gear to be exposed and accessed therethrough and also covers a range in which said connecting hole is to be vertically moved with said vertical rotation of said lock gear;
• and
• a connecting region formed in said first side wall of said base bracket at a point near to said opening, said connecting region being so configured to allow both said second connecting region and second anchor end region of said tension spring to be inserted therein, while allowing said second anchor end region to be hookingly connected therewith;
• wherein said body portion of said tension spring is disposed on said outer surface of said first side wall of said base bracket, such that said first anchor end region of said tension spring is hookingly connected with said connecting hole of said lock gear through said opening, with said first connecting region thereof passing through said opening and said connecting hole, and that said second anchor end region of said tension spring is hookingly connected with said connecting region defined in said first side wall of said base bracket, with said second connecting region thereof passing through said connecting region.