Counter force mechanism with a concentric spiral spring
2015
A counterforce includes a first securing lug and a shaft which is rotatably supported by the first fastening tab. A second fastener tab is secured to the shaft and rotatable with the shaft about a winding axis. A coil spring connects the first attachment lug and the second securing lug with each other. At the second fixing lug, a spring bracket. The spring retainer includes an annular wall arranged in the circumferential direction about the winding axis and is concentric with it. The annular wall is radially positioned relative to the winding axis so as to contact an outermost convolution of the coil spring, to position the coil spring around the winding axis in a helical orientation in the manner that each turn of the coil spring substantially at a constant angular speed of the winding axis moves away to provide a same radial distance between adjacent turns of the coil spring substantially.
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