Abstract: The present invention illustrates an electrical connector for detachable installation in a bicycle frame, which is detachably installed in a lower fork of a bicycle frame and includes a fixed seat and an inserted seat. The fixed seat is installed in the aforementioned lower fork. The fixed seat is hollow in shape. The inserted seat is inserted in the fixed seat movably back and forth. The inserted seat has a first end surface, a second end surface opposite to the first end surface, and a core shaft installation hole penetrating through the first and second end surfaces. The first end surface of the inserted seat is provided with a set of electrically conductive structure. As a result, when a wheel hub motor is installed on the bicycle frame, the electrical connector is able to be pushed to be electrically connected with the wheel hub motor as needed.

Abstract: An electronic device comprises a heat source and a heat distribution structure coupled to the heat source to distribute heat generated by the heat source during operation of the electronic device.

Abstract: According to the present disclosure, a laptop may be provided with a compartment including a moveable segment, an expandable heat exchanger with a movable section, and an expandable fan unit. The release of the movable segment of the compartment from a lower portion of the compartment produces an opening in the compartment and the movable section of the expandable heat exchanger is extended downward, and the expandable fan unit is lowered when the movable segment of the compartment is released.