| 摘要 |
<p>A reclining device comprises a base fixedly connected to a seat cushion, an arm fixedly connected to a seat back, and rotatably supported on the base, and having an inner toothed portion, at least one toothed block slidably disposed between the base and the arm and having an outer toothed portion meshable with the inner toothed portion, and a rotary cam in cam-connection with the toothed block for producing an outward or inward sliding motion of the toothed block to mesh or unmesh the outer toothed portion with or from the inner toothed portion by rotation of the cam. The base is formed integral with a recessed guide with two parallel side walls for slidably guiding the toothed block. To insure a smooth meshed engagement, the recessed guide is formed at the base so that a direction of a center line of the outer toothed portion is offset from a direction of sliding motion of the toothed block by a predetermined angle. The center line is defined as a line passing through both a centre of the outer toothed portion and a hypothetical center-of-curvature of the outer toothed portion. <IMAGE></p> |
