Abstract: The present invention relates to a thorn-proof insole comprising an insole assembly and a plurality of joint assemblies and featuring in matching the shape change of the sole of a foot when the insole assembly is extended. The insole assembly includes four plates which are consecutively joined together. The joint of the first plate and the second plate is located between a user's toes and thenar, the joint of the second plate and the third plate is corresponding to the middle portion of the arch of foot, and the joint of the third plate and the fourth plate is located between the arch of foot and the heel portion. The four plates could be designed with the same thickness or with different thickness according to the requirement of its location. Each plate must be at least 0.5 mm thick, and each joint assembly includes at least two first sleeves, one second sleeve and one pin. The first sleeves and the second sleeve are respectively applied to make two adjacent plates join together.

Abstract: A brush structure includes a rotation bar, a plurality of brush strips, a plurality of fixing blocks, and a driving block mounted on the rotation bar to rotate the rotation bar. Thus, the helical groove is extended through the whole length of each of the two arc-shaped plates of the rotation bar, so that each of the two brush strips is extended through the whole length of each of the two arc-shaped plates of the rotation bar without interruption, thereby enhancing the cleaning effect of each of the two brush strips.