Patent ID: 7849980

Claim:
A disk braking device comprising: a disk plate fixed to a wheel; and a brake pad including a friction member arranged to generate a frictional force between the brake pad and the disk plate; wherein the disk plate includes a plurality of through-holes and a plurality of notches formed at an outer peripheral edge of the disk plate, the through-holes are formed such that no radial line passing through a center of the disk plate and the outer peripheral edge of the disk plate passes through more than one through-hole, and the notches are arranged so that a radial line passing through one of the plurality of through-holes also passes through one of the plurality of notches, and the plurality of through-holes are formed at circumferential intervals on a plurality of concentric circles centered about a center of the disk plate and arranged to pass through centers of the plurality of through-holes and the plurality of notches are formed at circumferential intervals at the outer peripheral edge of the disk plate, and when the plurality of notches and the plurality of through-holes are moved onto a virtual straight line passing through the center of the disk plate and the friction member is moved onto the virtual straight line, the plurality of notches and the plurality of through-holes form a virtual slit radially crossing a projected plane of the friction member onto the disk plate.