Patent ID: 11091224

Abstract:
A bicycle derailleur is provided with a front gear plate and a rear gear plate. A small gear of the front gear plate corresponds to a big gear of the rear gear plate to form a low-speed gear, and a big gear of the front gear plate corresponds to a small gear of the rear gear plate to form a high-speed gear. A transmission box is arranged between the front gear plate and the rear gear plate, and a clutch lever can be controlled to enable the front gear plate to move forwards to be separated from the transmission box or to move backwards to be engaged with the transmission box. A gear case fixed to an edge of a triangular bracket is disposed around a middle of the transmission box. A top of the transmission box penetrates through the gear case to be movably connected to a gear shift lever. The clutch lever and the gear shift lever can be controlled to enable the transmission box to move forwards, backwards, leftwards, or rightwards in the gear case to reach a desired gear.