Abstract: A brake structure capable of adjusting a distance between two brake shoes of a bicycle is disclosed. When the screw is screwed in the adjusting hole, the screw is against and pushing the push member, the concave portion of the push member is pushing the roller, and further the roller is rolling to push the horizontal wall to adjust a distance between the first brake shoe and the second brake shoe to be shorter. When the screw is screwed out of the adjusting hole, the push member is pushed back toward the bolt member, and further the horizontal wall is pushed back toward the push member to roll the roller to adjust the distance between the first brake shoe and the second brake shoe to be longer.

Abstract: A quick-release device for a bicycle brake including a first brake arm, a second brake arm, and a brake cable terminated at the second brake arm, the quick-release device is provided with a lever including a long part and a short part pivotably secured to a top of the second brake arm; and an attachment assembly for securing the brake cable to a joining portion of the long part and the short part. A rotation of the lever in a first direction loosens the brake cable and increases a distance between the first brake arm and the second brake arm. A rotation of the lever in a second direction contrary to the first direction tightens the brake cable and decreases the distance between the first brake arm and the second brake arm.

Abstract: A brake mechanism of a bicycle brake is provided with two brake arms each including a bifurcated main body having two opposite, longitudinal through slot members, an insert having a longitudinal through slot and disposed in the main body, and a fastening member driven through the through slot members and the through slot to adjustably fasten the insert and the main body together; and two brake pads each threadedly secured to the insert. A movement of each fastening member along the through slot members and the through slot transversely moves one brake pad, thereby adjusting a distance between a wheel rim and one adjacent brake pad.

Abstract: A quick-release device for a bicycle brake including a first brake arm, a second brake arm, and a brake cable terminated at the second brake arm, the quick-release device is provided with a lever including a long part and a short part pivotably secured to a top of the second brake arm; and an attachment assembly for securing the brake cable to a joining portion of the long part and the short part. A rotation of the lever in a first direction loosens the brake cable and increases a distance between the first brake arm and the second brake arm. A rotation of the lever in a second direction contrary to the first direction tightens the brake cable and decreases the distance between the first brake arm and the second brake arm.