PURPOSE: To support even an eccentric load with a click spring stably to improve durability by respectively forming a spring supporting projection for projecting to the direction opposite to the projecting direction of a dome part at three corners of a click spring.

CONSTITUTION: Press work is performed to a metal plate 10 to form multiple click springs A in the longitudinal direction of the metal thin plate. The click spring A is formed into nearly triangle, and is connected to the thin plate 10 through a hanging part 9. The tip of each corner of a metal plate 1 of the spring A is bent to the direction opposite to the projecting direction of a dome part 3 to form a projection part at each corner of the metal plate 1 of the spring A. The projection parts 7 support the spring A, and a stroke length H of the spring A measures between the lower surface of the projection par 7 and the bottom of a recessed part 5 near the top of the dome part 3. Holes 12 are positioning holes of the thin plate 10.