Patent ID: 8393683

Claim:
An automotive seat headrest supporting apparatus, comprising: a stay extending downwards from a headrest and having a plurality of locking portions which are formed in appropriate positions in an axial direction; a headrest supporting member to be installed in a seat back portion of an automotive seat; and a stay locking unit incorporated in the headrest supporting member to lock the stay, wherein the headrest supporting member has: a stay guiding hole into which the stay is inserted; and an incorporating recess which is opened to an outer surface and which communicates with the stay guiding hole within the headrest supporting member 10 from a direction intersecting the stay guiding hole, wherein the stay locking unit includes: a stay lock body which is slidably fitted into the incorporating recess and which has an insertion hole formed so that the stay inserted into the stay guiding hole is inserted thereinto within the incorporating recess; a locking bar which is incorporated into the stay lock body so that a portion thereof is exposed in the insertion hole to be brought into engagement with the locking portions on the stay which is inserted into the stay guiding hole; and a biasing member to bias the stay lock body in a direction in which the exposed portion of the locking bar which is exposed in the insertion hole is brought into abutment with the stay which is inserted into the stay guiding hole, wherein the stay lock body includes: a base member having an accommodation groove to accommodate the locking bar therein; and a locking bar holding member to be set on a surface of the base member, wherein the insertion hole is formed so as to penetrate through the base member and the locking bar holding member, respectively, wherein the accommodation groove is opened in the surface of the base member, and wherein the locking bar holding member set on the surface of the base member closes the accommodation groove so as to hold the locking bar within the accommodation groove.