ROTATION ADJUSTMENT MECHANISM FOR VEHICLE SEAT

摘要

PROBLEM TO BE SOLVED: To simply compose a rotation adjustment mechanism of the minimum number of parts necessary, and prevent the failure in operation and the generation of the play by eliminating the fixing of an angular regulation member with welding means or others. SOLUTION: An engagement slide part 21 having a roughly inverted U-shaped cross section is formed on a lower base 11. An upper base 13 is disposed through the engagement slide part 21 of the lower base 11 and a first rolling member 23. A slide part 25 having a roughly U-shaped cross section to be engaged with the engagement slide part 21 is formed on a holder member 15. A second rolling member 27 is provided between the slide part 25 of the holder member 15 and the engagement slide part 21 of the lower base 11. A first angular regulation member 51 is integrally formed on the upper base 13 or the lower base 11 to be protruded to the side of the first rolling member 23. A second angular regulation member 53 is formed at the side of the first rolling member 23 to be engaged with the first angular regulation member 51 at the prescribed turning position.