Abstract: Provided is a wakeboard structure including two opposing, spaced-apart outer plates pressed together and sealed at two opposing ends thereof to thereby form a hollow casing filled with a foaming material. To enhance the internal structural strength of the wakeboard structure and prevent the outer plates from severing, inner sides of the two outer plates are coated with a glue layer before being adhered with a reinforcing panel, respectively. The reinforcing panel is made of plastic or a plastic composite material. The outer plates, the glue layers, and the reinforcing panels are coupled together, such that the wakeboard structure thus fabricated is unlikely to crack or sever when subjected to pressure or repeated impact, lightweight, highly buoyant, and effective in ensuring personal safety.

Abstract: A fastener for a water-sport appliance includes a body of a certain thickness being disposed protrudingly on a working surface (e.g., an aquaboard), wherein the body is formed with a receiving chamber in a central portion thereof and a magnetic component is disposed on a wall surface of an end of the receiving chamber; and a cover being pivoted at an end of the receiving chamber of the body, wherein a magnetic component is also disposed at an end of the cover to attract the body and, in use of the fastener, the other end of the cover can be depressed so that the end of the cover is lifted upward to form a prong-like space for the water-sport appliance to abut against. Thus, the water-sport appliance can be held more safely and securely.

Abstract: A detachable roller skate comprises a boot comprising a front cavity, a rear cavity, and an elongate plate interconnected the cavities wherein each cavity has two resilient side protrusions and a rear projection; and a truck comprising a sole plate, an engagement plate threadedly secured to sole plate, a front abutment member on top of engagement plate having a neck and a rear projected member above neck, a rear opening in engagement plate, a front upright projection in rear opening, an internal spring receptacle, a channel extended from rear opening to a rear end of engagement plate, and a push block comprising a front flat, a rear elongated plate, a stop member above flat, two side grooves at stop member, an abutted member on top of stop member, and two side dents at abutted member being perpendicular to and in communication with side grooves. The invention can easily fasten boot and truck or unfasten the same.

Abstract: A detachable roller skate comprises a boot comprising a front cavity, a rear cavity, and an elongate plate interconnected the cavities wherein each cavity has two resilient side protrusions and a rear projection; and a truck comprising a sole plate, an engagement plate threadedly secured to sole plate, a front abutment member on top of engagement plate having a neck and a rear projected member above neck, a rear opening in engagement plate, a front upright projection in rear opening, an internal spring receptacle, a channel extended from rear opening to a rear end of engagement plate, and a push block comprising a front flat, a rear elongated plate, a stop member above flat, two side grooves at stop member, an abutted member on top of stop member, and two side dents at abutted member being perpendicular to and in communication with side grooves. The invention can easily fasten boot and truck or unfasten the same.