Abstract: A coil module comprises a circular core and a winding is provided. The circular core comprises an outer circular portion and an inner circular portion. The winding is wound around the outer circular portion in a single-layer configuration and around the inner circular portion in a multi-layer configuration. The coil module comprises a first thickness after the winding is wound around the outer circular portion and comprises a second thickness after the winding is wound around the inner circular portion, wherein the first thickness is greater than or equal to the second thickness.

Abstract: A bicycle power generator includes a tube which is adapted to be installed in a bottom bracket of a bicycle. The tube has a receiving space defined therein. A plurality of coil stators is annularly disposed in an inner periphery of the receiving space. A rotary shaft axially passes through the tube. The rotary shaft has a plurality of magnets annularly disposed on an outer periphery thereof. The plurality of magnets are intervally alternately arranged in north and south polarities. Each end of the rotary shaft has a threaded portion formed thereon for adapting to threadedly connect with a bicycle crank, such that the rotary shaft rotates with the bicycle crank. When the rotary shaft synchronously rotates with the bicycle crank, the plurality of magnets disposed on the rotary shaft is axially rotated relative to the coil stators such that the coil stators generate electricity.

Abstract: A luminous alerting device includes two connecting portions, two illuminating units detachably attached to the two connecting portions for adapting to be mounted on an outfit, and a wireless controller wirelessly communicated with the two illuminating units for controlling illuminating of the two illuminating units.

Abstract: A detecting apparatus for a bicycle includes a detector mounted on a wheel fork and a monitoring device connected to a bicycle for immediately monitoring cycling status data. The detector wirelessly communicates with the monitoring device for detecting a wheel rotation rate. The monitoring device includes a process unit controlling the monitoring device and calculating a bicycle speed from the wheel rotation rate. A display module is electrically connected to the process unit. The display module has a speed display mode for displaying the bicycle speed.

Abstract: A wireless brake light apparatus includes a brake device adapting to be connected to a handlebar of a bicycle. The brake device comprises a brake lever. A clamping member is detachably connected to the brake device. An actuator is adjustably connected to the clamping member and located beside the brake lever. The actuator has a detector disposed thereon and facing the brake lever. At least one lighting device adapts to be mounted on the bicycle and wirelessly communicated with the detector. When braking, the brake lever is simultaneously slightly moved to contact with the detector. The detector is actuated to send a radio frequency signal to the at least one lighting device for providing illumination.

Abstract: A coil module comprises a circular core and a winding is provided. The circular core comprises an outer circular portion and an inner circular portion. The winding is wound around the outer circular portion in a single-layer configuration and around the inner circular portion in a multi-layer configuration. The coil module comprises a first thickness after the winding is wound around the outer circular portion and comprises a second thickness after the winding is wound around the inner circular portion, wherein the first thickness is greater than or equal to the second thickness.

Abstract: A vertical transformer includes a bobbin and a core pair. The bobbin includes a winding region and a through hole. The through hole is disposed inside the winding region. The core pair includes a first core and a second core. The second core is inserted in the through hole against the first core. The vertical transformer reduces volume and meets required safety standards of the insulation distance of electric devices.

Abstract: A transformer applied to an electronic device includes a bobbin, an iron core assembly and an insulating case. The bobbin includes a winding region. The iron core assembly is disposed at both ends of the bobbin. The insulating case covers at least one portion of the iron core assembly and is located between the iron core assembly and the electronic device.