| CPC B60N 2/897 (2018.02) [B60N 2/818 (2018.02)] | 9 Claims |
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1. A headrest level adjustment mechanism for a headrest, comprising:
a main support that is provided on a side of a main headrest stay, and cooperates with the main headrest stay to provide a locking mechanism operable to adjust a level of the headrest provided above a seat back and lock the headrest at a predetermined level, the main headrest stay being held by the seat back and hanging down from a first position of the headrest; and
a sub support that is provided on a side of a sub headrest stay, and cooperates with the sub headrest stay to provide a movement restriction mechanism operable to restrict downward movement of the headrest and keep the headrest at a lowest-level position at which the headrest is located at a lowest level, in a condition where the main headrest stay is engaged with the main support, and a gap is provided between the headrest and the seat back, the sub headrest stay being held by the seat back and hanging down from a second position of the headrest that is spaced from the first position in a seat width direction,
the locking mechanism includes a plurality of main notches included in the main headrest stay and arranged in a hanging direction of the main headrest stay,
the plurality of main notches includes
a main notch for the lowest-level position, the main notch being configured to set the headrest at the lowest-level position, and
one or more main notches located below the main notch for the lowest-level position in the hanging direction of the main headrest stay,
the movement restriction mechanism includes a sub notch portion included in the sub headrest stay,
the sub notch portion includes a sub notch for the lowest-level position at a same level as the main notch for the lowest-level position, and
the sub notch portion does not include a sub notch below the sub notch for the lowest-level position in a hanging direction of the sub headrest stay.
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