Abstract: A cell fast fixing structure of starting box, including a cell seat and a locating member disposed in the starting box. A stop board is pivotally connected with the cell seat. Cells are placed between the cell seat and the locating member. The stop board can be pivotally turned onto the cell seat to fix and prevent the cells from dropping out.

Abstract: A structure for connecting a rim with a tire. The tire is formed with a central axial through hole. Multiple annularly arranged perforations are formed around the through hole. Each perforation is defined by a close circumference which is separated from the through hole by a separating section, whereby the circumference of the perforation is enclosed and the perforation simply axially passes through the tire. The rim is composed of a seat and a cooperative disc. The seat has insertion members respectively corresponding to the perforations of the tire. The insertion members are inserted into the perforations from one side of the tire, while the disc is mounted on the other side of the tire to connect with the seat.