| 摘要 |
<p>A Christmas tree stand includes a baseboard (1), a case (2) and a rotatable inner bucket (8). A natural or artificial Christmas tree is positioned in the inner bucket (8) and is fixed through some bolts (9). The inner bucket (8) rotates by driving of a DC-motor (3) and a gear (5). The Christmas tree stand has some Christmas lamps (11, 32, and 33) whose flicker are controllable and may play music, and may be timed. The said functions are operated through a manual manipulator (16) connected to an electrical device (12) in the Christmas tree stand by a wire (17). A transformer (14) is used in the Christmas tree stand to transform the 220V AC input into 24V DC output to the electrical device (12) of the Christmas tree stand. The electrical device (12) includes a 24V switching power supply and a controller, and provides power to the whole circuit through the 24V switching power supply.</p> |
