Abstract: A shock absorber for a remote-controlled model car includes a sealing member fixed on the topside of a piston. The sealing member has two opposite flexible portions respectively matching with the flow-guiding holes of the piston, with flow gaps formed between the flexible portions and the upper outer sides of the piston. The flow gap, matching with the extent of an external force imposed upon the shock absorber, can be properly diminished or closed up. Each flexible portion is bored with a flow-adjusting hole smaller than and aligned to the flow-guiding hole of the piston for reducing the flow amount of liquid oil flowing through the flow-guiding hole. When pressed by different-extent external forces, the shock absorber can automatically adjust its buffering force to an excellent condition by adjustment of the flow-adjusting holes and the flow gaps.

Abstract: A manual starter for model engines includes a winding wheel unit and a clutch unit. The clutch unit has a base, a starting device, a position device, an urging device and a return device combined together. The starting device is both rotated and moved backward by the winding wheel rotated by a pull rope wound around the winding wheel, moving an engage shaft into engagement with and to rotate a piston crank of a model engine so as to start the engine. Then after the engine is started, the engage shaft is automatically retracted by the position device and the urging device to be disengaged from the piston crank, permitting the engine to operate freely.

Abstract: A computer mainframe housing, including an under body having a shackle secured to a rear side wall thereof at an outer side by springs for fastening the housing to a support, a cross bar suspended inside said under body for hanging a diskdrive holder, a top cover covering the under body and secured thereto through hook joints, and a front panel fixedly secured to the top cover and covering the front side wall of the under body. The front panel has a lock controlled by a key to lock a cam in a key hole on the front side wall of the under body.