Abstract: A bicycle spoke warning light device capable of setting and displaying characters. The device is mounted on the spoke of the bicycle, in which a rotational speed detecting unit of a controlling circuit detects the rotational speed of the spoke. When the rotational speed reaches a certain value, a processor takes out the data set in a memory unit by a setting unit and makes multiple light sources immediately emit light to form a predetermined picture or character on the quickly rotating spoke by using temporarily remaining vision so as to achieve a highlighting and warning effect.

Abstract: A rotary driving mechanism for brake device which mainly includes: a brake device, a base seat, and a rotary member, a linking member, a guiding block, and a torque spring. Therefore, the invention provides a rotary driving mechanism which is fitted to a handle of the bicycle for driving a brake device. A pulling travel of the steel cord for driving the brake device is elongated and the abrasion of the section against which the steel cord is pulled is avoided. Also, a torque spring is used to achieve a better restoring effect.