| 摘要 |
<p>PURPOSE: A swimming board is provided to form a neck-insertion hole in which a neck of a swimmer can be inserted, thereby capable of easily floating on and freely swimming by a backstroke style. CONSTITUTION: A swimming board comprises a main body(10), a fixing unit(20), and a current protrusion(30). In the middle of the main body, a neck insertion hole is formed. edge of a front end part of the neck insertion hole is formed to round with specific curvature. The fixing unit consists of an elastic strip, and a tightening ring to tighten the elastic strip. A plurality of current protrusion is formed with constant gaps on the bottom of the main body back and forth. In the main body, on the basis of the neck insertion hole, accepting grooves with specific depth are formed in both sides of the top side, and a cover combined with the main body is formed in the upper side of the accepting groove. The main body and the current protrusion are manufactured from a foam resin compressed to 5 layers.</p> |
