| 摘要 |
The present invention relates to a power cord for using safely an electronic product to be connected in a forward direction by turning off a display lamp if the electronic product is connected in a reverse direction. The present invention relates to a circuit in which a display lamp is turned on and off including: a display lamp (L) which is turned on in the case of connection in a reverse direction, and of which the front side is connected to the rear side of a load; an internal switch (S) which forms a b contact point (Sb); and a circuit which the rear side of the b contact point (Sb) is connected to the ground. |
