Abstract: A kick scooter has a steering control device including a seat including an oval hole and two side armrests each having a through hole; a connecting member including an intermediate hollow projection and two wings; two linking assemblies each including a linking bar having one end connected to either front wheel; a limit pin movably disposed in the oval hole and secured to the connecting member; and a restoring mechanism including a biasing member fastened by the limit pin, and two positioning members each moveably disposed through the through hole and having an anchor at one end in either end of the biasing member, a threaded section at the other end, an intermediate flange, and two nuts each secured to the threaded section. The seat and the linking assembly are pivotably fastened together. The seat, the linking assembly, and the connecting member are pivotably fastened together.

Abstract: A rear brake assembly of a kick scooter includes a brake including an attaching member having an open end; and a visual warning device being a module and fastened in the attaching member by snapping. Also, the fastening of the visual warning device in the attaching member is done manually.

Abstract: A bottom structure of a roller skate includes a sole; a frame secured to the sole and including front and rear supports and two hubs disposed on the front and rear supports respectively; a pivotal member disposed in the hub; two spaced sleeves disposed in the hub wherein the sleeves are further partially disposed in the pivotal member and secured to the pivotal member; a shaft passing through the hub, the pivotal member, and a gap between the sleeves, and rigidly secured to the pivotal member; and two enlargements disposed at two ends of the shaft respectively.

Abstract: An inline skate includes a front wheel mount secured to a bottom of a skate boot; a front wheel rotatably secured to the front wheel mount; a rear wheel mount secured to the bottom of the skate boot; a rear wheel rotatably secured to the rear wheel mount; and a shock absorber disposed between the front wheel mount and the rear wheel mount and including two sets of a positioning member secured to the skate boot; a threaded adjustment member disposed through either the rear or front wheel mount; a first bifurcation element through a biasing member and having one end secured to the adjustment member and the other two ends secured to the biasing member; and a second bifurcation element through the biasing member and having one end secured to the positioning member and the other two ends secured to the biasing member.