| 摘要 |
<p>A rocking chair (1) is provided with a seat (30), a projecting member (40) provided on the lower side of the seat (30) and having a convex surface (41a) forming a part of a spherical surface (b) centered on a point (A) located above the seat (30), swivel casters (20) in contact with the convex surface (41a) of the projecting member (40) and guiding the projecting member (40) such that the projecting member (40) can rock along the spherical surface (b), and a support member (10) for the chair. The swivel casters (20) are mounted such that the axes (a) of swivel shafts (22) of the swivel casters (20) pass through the center point (A) of the spherical surface (b), and the seat (30) is guided in the direction of a force applied by rollers (25) of the swivel casters (20). Rocking of the projecting member (40) is smoother than that in rocking chairs using ball casters instead of the swivel casters (20), and noise caused by rocking is drastically reduced. The chair can be produced inexpensively because the swivel casters are inexpensive.</p> |
