Buckling spring
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A buckling spring is a type of keyswitch mechanism that was popularized by IBM through its keyboards for the PC, PC/AT, 5250/3270 terminals, PS/2, and other systems. It was used by IBM's Model F keybo
Unicomp Model M with removed z key. The exposed buckling spring is visible.
IBM Model F (left) and Model M (right) keyboard springs
Coil spring
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A coil spring is a mechanical device that typically is used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. It is made of an elastic m
Buckling spring
…original patent: "A non-teasible, snap action, tactile feedback, key mechanism of extreme mechanical simplicity and high reliability is achieved." The coil spring tensed between the keycap and a pivoting hammer buckles (i.e. kinks or collapses) at a certain point in its downward traverse, providing auditory and…
A tension coil spring
A selection of conical coil springs
Volute spring suspension on an M4 Sherman tank
Coil spring in valvetrain