US 4,068,890 AGranted

Seat lock device

AssigneesMitsui Mining & Smelting Co., Ltd., Honda Motor Co., Ltd.

InventorsToshio Kurozu, Shinjiro Yamada, Norio Miyashita

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Abstract

A seat lock device which comprises a lock unit fixed on each side of a back rest swingable back and forth and at a point spaced from a seat shaft and a plurality of strikers engageable with the lock unit, and wherein the lock unit includes elongate grooves engageable with the strikers and lock grooves; a circular actuating unit provided with elongate grooves engageable with the strikers and lock grooves, held at a free position ready for engagement with the striker when the elongate groove remains disengaged from the striker and rotated when the elongate groove is engaged with the striker; a latch for locking the lock groove by engagement therewith when the circular actuating unit is rotated to a lock position; a gate mechanism for preventing the lock action of the latch when the elongate groove remains disengaged from the striker; and a releasing mechanism for releasing the lock action of the latch, thereby enabling the back rest to be locked in an inclined position corresponding to any of the strikers engaged with any of the elongate grooves.

Claims5

Dependent claims

A seat lock device comprising a lock unit fitted to one member of an immovable member and a swingable back rest member of a seat, the back rest member being rotatably supported by a pivotal shaft mounted on the immovable member and at a point spaced from the pivotal shaft;

a plurality of strikers mounted on the other member of the immovable member and the swingable member along the circumference of a circle centered at the pivotal shaft for lockable engagement with the lock unit, wherein the lock unit includes a case;
a substantially circular actuating unit pivotally supported by the case to be rotated into selective engagement with any of the strikers;
lock means for locking the actuating unit when it is rotated to a lock position;
a direction-setting unit for rotating the actuating unit to set it at a free position ready for engagement with an approaching striker while the actuating unit remains disengaged from all said strikers;
a gate means for preventing the lock action of the lock means while the actuating unit remains disengaged from all the strikers;
and a releasing mechanism for releasing the lock action of the lock means.

3 more elements

Dependencies are inferred from the claim text.