Belt tightener for use with u-shaped seat, has spiral spring arranged adjacent to roller and having ends, where one end is connected with roller end and another end is connected either with frame/ hand grip for automatic rotation of roller
摘要
<p>The tightener has notches (140, 220) movable between an actuation position in which they are engaged with respective ratch wheel and a free wheel position in which they leave the respective wheel. A spiral spring (320) is arranged adjacent to roller and has ends. One end is connected with the roller end and another end is connected either with a frame or hand grip for automatic roller rotation when the notches are in free wheel position.</p>
