| 摘要 |
<p>A handle (12) is provided with a massage ball (23) and an opening (21b) smaller than the diameter of the ball (23). The ball is provided in a manner such that a portion thereof is exposed from the opening (21b), and so that the ball (23) is capable of rotational movement and movement along the axis of the handle (12). A ball supporting member (22) having a receiving surface (22a) for receiving the ball (23) is provided inside the handle (12). The curvature of the ball receiving surface (22a) is greater than the curvature of the spherical surface of the ball (23). When the ball (23) is engaged with the rim of the opening (21b) in the handle (12), a gap (S1) is formed between the ball (23) and the ball receiving surface (22a).</p> |
