US 2002/0171280 A1Published application

Seat reclining device

AssigneeAisin Seiki Kabushiki Kaisha

InventorsHiroyuki Okazaki, Yukifumi Yamada, Naoaki Hoshihara, Sadao Ito, Hideo Nihonmatsu

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Abstract

A seat reclining device has a first arm member adapted to be secured to the seat cushion frame or the seat back frame, a second arm member rotatably supported by the first arm member and adapted to be secured to the other of the seat cushion frame and the seat back frame, and a plurality of pawls for locking an adjusted angle of the seat back. The pawls are disposed on the first arm member and include at least a first pawl and a second pawl. Only one of the first and second pawls is provided with an engaging portion. The second arm member is provided with a receiving portion for preventing the engagement of the outer gear with the inner gear when the engaging portion contacts the receiving portion during relative rotational movement of the first and second arm members.

Claims20

Dependent claims

A seat reclining device comprising:

a first arm member adapted to be secured to one of a seat cushion frame and a seat back frame;
a second arm member rotatably supported by the first arm member and adapted to be secured to the other of the seat cushion frame and the seat back frame;
at least a first pawl and a second pawl movably disposed on the first arm member;
each of the first and second pawls being provided with an outer gear portion;
an inner gear portion formed on the second arm member for being engaged by the outer gear portion of the first and second pawls to fix a relative rotational position of the first and second arm members;
a receiving portion provided on the second arm member;
at least one stopper provided on the second arm member;
and
a projection provided on only one of the first and second pawls to engage the receiving portion during relative rotational movement of the first and second arm members to prevent the outer gear portions from engaging the inner gear portion, and to engage the stopper during relative rotational movement of the first and second arm member to define a forwardmost or rearwardmost reclining angle of the first and second arm members.

6 more elements

A seat reclining device comprising:

a first arm member adapted to be secured to one of a seat cushion frame and a seat back frame;
a second arm member rotatably supported by the first arm member and adapted to be secured to the other of the seat cushion frame and the seat back frame;
a plurality of pawls disposed on the first arm member and each provided with an outer gear portion, the plurality of pawls including a first pawl and a second pawl;
an inner gear portion formed on the second arm member and engageable with the outer gear portion on each of the first and second pawls;
the second arm member being provided with at least one stopper only one of the first pawl and the second pawl being provided with an engaging portion that engages the stopper during relative rotational movement of the first and second arm member to define a forwardmost or rearwardmost reclining angle of the first and second arm members.

2 more elements

Dependencies are inferred from the claim text.