Nippon Seiko Kabushiki Kaisha

Masuo Matsuki

Toshihito Miyagawa

Atsushi Sugiura

Sadakazu Furukawa

An overlock prevention mechanism for a vehicle acceleration sensor used on a retractor for a seat belt device in a vehicle comprises an inertial body which moves in response to acceleration of the vehicle; a sensor casing on which the inertial body is mounted; a ratchet wheel which locks the retractor; and a composite sensor arm assembly comprising an upper sensor arm which is adapted to be engaged with the ratchet wheel and a lower sensor arm which is adapted to come into contact with the inertial body to transmit the movement of the inertial body to the upper sensor arm; and when the upper sensor arm is interlocked with the ratchet wheel, the lower sensor arm is forced toward the inertial body by a force activated from the ratchet wheel and transmitted through the upper sensor arm, so that the inertial body is pressed to the sensor casing against movement.

Overlock prevention mechanism for acceleration sensor

A buckle for a seat belt system is disclosed. The buckle includes a buckle base, a buckle button provided movably in parallel with the length of the buckle base and defining in association with the buckle base a clearance through which an associated tongue plate may be inserted into the buckle, a cover, and a button spring provided between the cover and the buckle button for applying a spring force against the buckle button in a direction to push out the buckle button. The buckle button is provided with a tiltable member, which has a seat portion receiving an outer end portion of the button spring thereon and a suppressing portion projecting into the clearance from the seat portion.

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Chigasaki, Japan

Masuo Matsuki