Abstract: This brake pad wear detector is provided with an attachment part attached to a back plate having a first surface to which a lining in contact with a sliding surface of a disc rotor is secured and a second surface on the side opposite the first surface, an arm part protruding from the attachment part toward the side of the first surface opposite from the second surface, the arm part being curved toward the opposite side, and a contact part provided to the arm part and provided to a position where the contact part will come into contact with the disc rotor when the lining has worn away.

Abstract: This brake pad wear detector is provided with an attachment part attached to a back plate having a first surface to which a lining in contact with a sliding surface of a disc rotor is secured and a second surface on the side opposite the first surface, an arm part protruding from the attachment part toward the side of the first surface opposite from the second surface, the arm part being curved toward the opposite side, and a contact part provided to the arm part and provided to a position where the contact part will come into contact with the disc rotor when the lining has worn away.

Abstract: A disc brake device includes: a disc rotor assembled to a rotating body; a caliper assembled to a supporting member so as to straddle an outer periphery of part of the disc rotor; a pair of brake pads disposed so as to clamp the disc rotor; pistons disposed in a caliper to press the brake pads; a supporting shaft inserted into a supporting portion provided on the caliper to support the respective brake pads so as to be movable in a rotor axis direction; and a retaining member inserted into a through hole provided at one end of the supporting shaft to prevent the supporting shaft from coming apart from the supporting portion of the caliper. The retaining member includes a head portion configured to engage with one of opening portions of the through hole, and a pair of leg portions to be inserted into the through hole, and at least one of a pair of the leg portions is bent, and includes a barb shape configured to engage with the other opening portion of the through hole.

Abstract: A pin slide-type floating disc brake includes a mount, a caliper, one of which has a slide hole, a support pin provided to the other one and slidably inserted into the slide hole, and a tubular pin boot covering a part of the support pin. The pin boot includes a pin-side annular seal portion, a slide hole-side annular seal portion, and an extendable tubular bellows portion connecting those seal portions. The outer peripheral part of the slide hole-side annular seal portion includes an elastic restriction portion to elastically restrict movement of the slide hole-side annular seal portion in a rotor shaft direction, in an annular accommodation groove. The inner peripheral part of the slide hole-side annular seal portion includes, a first annular lip portion on a bellows portion side, and a second annular lip portion which has a retraction function on an opposite side to the bellows portion.