| 摘要 |
A cell phone charger that charges a cell phone and includes: prongs that are retractable and are plugged into an electrical outlet, a prong base that the prongs are assembled on, a rack gear that is connected to the prong base and has a rack gear hole, an extension gear that is engaged with the rack gear and is rotated to move the rack gear between a retracted position and an extended position, a spring that provides a force to place the rack gear and prongs is the retracted position, a retraction activator that controls a lock pin based on a retraction signal, a controller that generates the retraction signal and transmits the retraction signal to the retraction activator, and a voltage converter that converts provides a DC voltage and charges the cell phone. |
| 主权项 |
1. A cell phone charger that charges a cell phone, said cell phone charger comprising:
a plurality of conductive prongs that are configured to be plugged into an electrical outlet to provide an electrical connection between said cell phone charger and an AC power source, said plurality of conductive prongs being retractable prongs; a prong base on which said plurality of conductive prongs are disposed, said prong base being made of an electrical insulator; a rack gear that is connected to said prong base having a rack gear hole; an extension gear that is engaged with said rack gear, said extension gear is rotated to move said rack gear between a retracted position and an extended position; a spring that is connected to said rack gear at one end and to a spring base at another end, and that provides a force to place said rack gear in said retracted position; a lock pin that is positioned to be engaged with said rack gear hole and lock said rack gear in said extended position; a retraction activator that controls said lock pin based on a retraction signal; a controller that generates said retraction signal and transmits said retraction signal to said retraction activator, and that detects a charging status of said cell phone; and a voltage converter that converts an AC voltage from said AC power source to a DC voltage and charges said cell phone with said DC voltage when said plurality of conductive prongs are plugged into said electrical outlet. |
