Lock pawl for rear wheel hub of bicycle, is made of ceramic material which is provided with fiber

摘要

The lock pawl comprises edges and corner portions which are rounded. The lock pawl is made of ceramic material provided with fiber, and is produced by using injection molding process. The radius of front edge of the lock pawl is large. The ceramic material is comprised of aluminum oxide (Al2O3), silicon nitride (Si3N4) or zirconium oxide (ZrO2).