| 摘要 |
<p>An automatic pole includes a mechanical push device and a circuit board device electric-connected with each other. The mechanical push device includes a magnetic inductance device, a contact device, and a housing. The circuit board device comprises a control circuit and an internal cell. The control circuit includes a first optoelectronic coupler and a second optoelectronic coupler electric-connected with each other, and a first transistor which base is connected to the first optoelectronic coupler and a second transistor which base is connected to the second optoelectronic coupler.</p> |
