Patent ID: 8633410

Claim:
A switch coupled to a switch support, the switch comprising: a push button; a lock assembly that is shifted between an unlock state, which permits actuation of the button, and a lock state, which prohibits actuation of the button, wherein the lock assembly includes an operation ring rotated about the button between an unlock position, which corresponds to the unlock state, and a lock position, which corresponds to the lock state, a lock ring coupled to and rotated integrally with the operation ring, wherein the lock ring includes a rotational positioning portion that is resiliently deformed by a fixed positioning portion, which cannot be rotated relative to the switch support, when the operation ring is located at an intermediate position between the unlock position and the lock position to guide the operation ring to the unlock position or the lock position; a tab projecting outward in a radial direction from the button; and a hook formed on the operation ring, wherein when the operation ring is located at the lock position, the hook and the tab are arranged at the same position in a circumferential direction thereby blocking actuation of the button as the hook contacts the tab, when the operation ring is located at the unlock position, the hook is separated from the tab in the circumferential direction, which avoids interference between the tab and the hook and permits actuation of the button, and inner dimensions of the operation ring including the hook and inner dimensions of the lock assembly are the same as or greater than outer dimensions of the button excluding the tab.