摘要 |
<p>The device (100) has a spring (50) placed between a tubular control element (40) and a saw shaped main body (10). Free ends (51, 52) of the spring are fitted at the control element such that elasticity of the spring produces axial impulse and twisting of the control element for pressurizing the control element and for retaining the control element in a localized manner at which inclined ring shaped convex form (421) stays in contact with stoppers (20, 30) and at which a stop region (44) of a plate (19) lies.</p> |