| 摘要 |
PURPOSE: To enable necessary training by forming a belt so that a relatively powerful buoyancy is given to the central part of its material where the back of a user is contacted, and the lower part of the material is bent upward from both sides up to the center. CONSTITUTION: The upward width of a material 8 having buoyancy is designed so as to get wider as approaching a position 32 (the center of the material), the backmost of the material 8. Such a design to have a broad back width is realized mainly by a broad part 34 extending symmetrically upward, and secondarily, by a part designed to be broad 36 extending downward. The part designed to be broad 36 extends downward in a greater degree at both sides of the back position 32 of the material to form the lower part of the material 8 bending upward from both sides to the center. This works for avoiding accompanying friction and stimulation caused between the material 8 and hips 38 of a user. A hole 58 piercing the material 8 is formed so as to remove the suppressed air or water between the buoyant material 8 and a user 10 when the user dives into deep water with this belt 12 on. |
