Plane scroll spring the embodiment of the utility model discloses a curtain driving device, which made by the conventional process of traditional plane scroll spring reverse winding and from the outer to the inner radius of curvature of the forming section plane scroll spring reeds increased gradually. The embodiment of the utility model is reverse winding through the traditional plane scroll spring is made by using the conventional process, the radius of curvature of the reed forming work increases gradually from the outer to the inner ring, and the embodiment of the utility model torque plane scroll spring provides greater than the outer ring inner ring provides torque corresponding to the outer. Spring supporting force cord required is large, the inner ring reed work cord required to support the smaller force, so as to better support force, makes the torque distribution and ply plane scroll spring required to match, always can give effective support to the power cord.
【技术实现步骤摘要】
窗帘驱动装置的平面涡卷弹簧
本技术涉及窗帘配件
,尤其涉及一种窗帘驱动装置的平面涡卷弹簧。
技术介绍
出于安全、美观等方面的考虑,无操作绳窗帘已成为窗帘产品的主要发展方向。在无拉绳窗帘中,与帘布相连接的拉绳绕设于绕线轮上,绕线轮可在驱动机构驱动下旋转,而使拉绳被绕至绕线轮上或从绕线轮上释放出来,从而实现帘布的升降。常见的驱动机构是平面涡卷弹簧,平面涡卷弹簧又名发条弹簧,是一种一端固定而另一端作用有扭矩的弹簧,在扭矩作用下弹簧的簧片产生弯曲弹性变形,使弹簧在平面内产生扭转,其变形角的大小与扭矩成正比。传统的平面涡卷弹簧在成型时,簧片弯曲成型后的成型曲率半径是由内圈向外圈逐渐增大,而簧片的成型曲率半径越小,所能提供的扭矩会越大,因此,传统的平面涡卷弹簧所提供的扭矩是由内圈向外圈逐渐减小。在驱动窗帘时,平面涡卷弹簧的外端卷绕固定在与平面涡卷弹簧自身中心轴平行的中转轴上,所述中转轴与绕线轮传动相连,中转轴旋转时会带动绕线轮旋转,反之亦然。在需要放下帘布时,可手动向下拉帘布,拉绳会带动绕线轮正向旋转,进而带动中转轴正向旋转,平面涡卷弹簧的簧片则逐圈卷绕至中转轴上;而要 ...
【技术保护点】
一种窗帘驱动装置的平面涡卷弹簧,其特征在于:所述平面涡卷弹簧是由常规工艺制成的传统平面涡卷弹簧进行反向绕卷而成的,所述平面涡卷弹簧的簧片的工作段的成型曲率半径由外圈向内圈逐渐增大。
【技术特征摘要】
1.一种窗帘驱动装置的平面涡卷弹簧,其特征在于:所述平面涡卷弹簧是由常规工艺制成的传统平面涡卷弹簧进行反向绕卷而成的,所述平面涡卷弹簧的簧片的工作段的成型曲率半径由外圈向内圈逐渐增大。2.根据权利要求1所述的窗帘驱动装置的平面涡卷弹簧,其特征在于:所述平面涡卷弹簧的簧片包括至少两个等矩段以及衔接于相邻两等矩段之间的作为工作段的变矩段,所述变矩段内各处的簧片的成型曲率半径由外圈向内圈逐渐增大,而等矩段内各处的簧片的成型曲率半径相等。3.根据权...
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