Page 186 - Mechanics of Microelectromechanical Systems
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3. Microsuspensions 173
Figure 3.42 Torsion stiffness plot
3.2 Spiral Springs
Another microsuspension variant for rotary motion is the spiral spring.
Two designs will be presented next, the spiral spring with small number of
turns and the spiral spring with large number of turns. Both designs will
consider thick and thin configurations.
3.2.1 Spiral Spring with Small Number of Turns
3.2.1.1 Thick Spiral Spring
A spiral spring that has a small number of turns is sketched in Fig. 3.43.
The inner end is fixed whereas the outer one is free. The outer (maximum)
radius is and the inner (minimum) one is
Figure 3.43 Spiral spring with small number of turns
