| 摘要 |
<p>An apparatus which, when operating, contains a hazardous voltage, field or electromagnetic wave, is provided with power supply cut-off means (220, 230) for cutting off the power supply when a housing member (50) is removed. The power supply cut-off means comprises contact means (220) having contacts connected to power supply lead and contacts connected to leads to electrical components of the apparatus, a sliding cover (230) and a pushing device (210) mounted to the housing member (50). The pushing device is provided with conductors for bridging between pairs of contacts on the contact means (220) when the housing member (50) is in place. The pushing device (210) pushes back the cover (230) to expose the contacts on the contact means (220) when it is put in place. When the housing member (50) is removed, the pair of springs (234, 235) puii the cover over the contact means (220), As a result, the apparatus is automatically de-energised when the housing member (50) is removed even if the power cord (100) remains plugged in to a mains outlet. <IMAGE></p> |
