Micro Switch A widely used design for microswitches includes the internal use of two conductive springs. The first straight metal strip spring is held horizontally by a hinge at one corner of the switch. It's a set of electrical contacts. A small arched spring (usually made of cymbals (Becu)) that is subjected to pressure during assembly, so that it is always trying to straighten within the switch housing. It is connected to a long, flat spring near an electrical contact. A fulcrum is arranged near the center of the leaf spring, and a small pressing actuator block contacts the leaf spring located near the hinge. The Bending Spring strives to pull the leaf spring away from its hinge-point, and the bending spring prevents such movement. The force is also applied to pull the leaf spring up from the anchor point, although the geometry ensures that this force is proportional to the downward displacement of the leaf spring as it is pulled down. When the actuator is pressed by the external force of the switch, it causes the leaf spring to bend, and the contact is closed by the bending spring. But eventually, when the bending of the leaf spring compresses the bending spring, the electrical contacts begin to separate. Even if the actuator block does not move further, the upward force of the bending spring is reduced by the downward movement of the leaf spring, which accelerates the movement of the leaf Spring and affects the normally open contact. When the leaf spring moves down, it loses tension, but the switch is designed so that acceleration remains the net effect of operation. This is the aforementioned extreme or eccentric action, and it leads to a distinct crisp feeling and audible clicking. Once the actuator is released, the leaf spring immediately begins to move upward. As it moves up, it causes the upward force exerted by the bending spring. The result is again acceleration, which stops when normally closed contacts are in contact. Even if it causes the leaf spring to bend, the bending spring is designed to be strong enough to move the contact, since the actuator does not actually move during the transition from bottom to top. Although microswitches have a long life, the arch "return" spring is usually the first to be damaged during the life of the switch.