Patent ID: 7938235

Claim:
A brake, comprising: a braking portion for braking a rotatable element, wherein the braking portion comprises a first side and an opposite second side, a friction sheet is attached to the second side for providing a friction to the rotatable element; a swinging portion secured with the first side of the braking portion; a resilient portion integrally formed with the swinging portion for generating a restoring force to make the braking portion contact the rotatable element; and a forced portion configured for being forced to counteract the restoring force and rotate the braking portion via the swinging portion, wherein when the forced portion is acted on by an action for braking the rotatable element, the resilient portion is compressed and the braking portion is driven to separate from the rotatable element, and wherein when the forced portion is free of the action for braking the rotatable element, the resilient portion restores to drive the braking portion to contact with the rotatable element.