Electrostatic Relay Second Spring Member Design

The movable spring is divided into multiple segments along its length, with each segment having a different spring modulus. The first segment (near the movable electrode) has a higher spring modulus to ensure reliable separation, while the second segment (near the base) has a lower spring modulus to reduce stress concentration and improve fatigue resistance. This segmentation allows the spring to simultaneously achieve high separation reliability and reduced design complexity.

Different portions of the movable spring are assigned different mechanical properties (spring modulus values) according to their specific functional requirements. The local quality principle enables the spring to have high stiffness where needed for electrode separation while maintaining lower stiffness in other regions to reduce overall stress and improve manufacturability, thereby resolving the contradiction between reliability and design complexity.

The movable spring is segmented into regions with different spring moduli, allowing the highest modulus only in the critical region near the movable electrode where separation force is most needed. This reduces the overall manufacturing precision requirements compared to uniformly increasing the spring modulus throughout the entire spring structure, while still achieving sufficient separation force to overcome adhesive forces between contacts.

The spring modulus parameter is varied along the length of the movable spring rather than being uniform. By changing the spring modulus parameter locally to match the force requirements at different positions, the design achieves adequate separation force without requiring high processing precision across the entire spring structure.

The second spring member is merged with the movable spring structure such that it works in parallel with the first segment of the movable spring. This combining approach provides independent adjustment capability for spring modulus and displacement characteristics without requiring completely separate mechanisms, thereby improving design flexibility while minimizing the increase in device complexity.

The second spring member serves multiple functions: it provides additional elastic restoring force, enables independent adjustment of spring modulus and displacement, and works synergistically with the segmented movable spring. This multi-functionality achieves high design flexibility without proportionally increasing structural complexity.