Importance

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Abstract

An object is to stably exhibit a two-stage spring characteristic of a plate spring for restraining the generation of a clonk noise in a disc brake apparatus for use in a vehicle. A plate spring 90 for restraining the generation of a clonk noise has a fixture portion 91 having a shape resembling the squarish letter U and elastically fixed to a back plate 61, and an extension portion 92 extending continuously from the fixture portion 91. The extension portion 92 includes an engagement subportion 92a engaged with a support member at all times; a curved subportion 92b located between the engagement subportion 92a and the fixture portion 91; and a contact-engagement subportion 92c located between the curved subportion 92b and the fixture portion 91. The contact-engagement subportion 92c is located a predetermined distance away from the back plate 61 when the back plate 61 is at a non-braking position, and is elastically deformed together with the curved subportion 92b and comes into surface contact with the back plate 61 in a nonslip manner when the curved subportion 92b is elastically deformed by a predetermined amount from its non-braking condition as a result of the back plate 61 moving from the non-braking position toward the rotor-rotation trailing side and thus toward the support member.

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First Claim