| 摘要 |
<p>A spring supported device such as especially a playground toy comprising a heavy coil spring the opposite ends of which are affixed to mutually movable parts such as a seat element and a support element anchored to the ground, respectively, so as to enable said parts to be moved resiliently by compressing, expanding or bending the spring, the spring at least at one end being wound and shaped in such a manner that the outermost winding has a small pitch and defines a support surface substantially normal to the axis of the coil spring, this outermost winding continuing, towards the opposite end of the spring, in a winding portion of increased or increasing pitch; for eliminating the jamming hazard in the narrow wedge shaped space between the outer winding portions there is mounted, at some point or area in this space, a distance piece between the windings, and connector means are provided for clamping the windings against the distance piece in order to lock the windings rigidly together at a place where the distance between the windings is large enough to exclude jamming of fingers or toes when the device is in use.</p> |
