Abstract: A test device includes a first connector, a second connector, a first power direction control circuit electrically connected to the first connector, a second power direction control circuit electrically connected to the first power direction control circuit through a power transmission circuit, and a detecting module electrically connected to the power transmission circuit and detecting the electric energy transmitted by the power transmission circuit. The second power direction control circuit is electrically connected to the second connector. The power sourcing device transmits the power to the powered device through the first connector. The first power direction control circuit, the power transmission circuit, the second power direction control circuit, and the second connector of the test device.

Abstract: A pressing cleaner for an optical connector's end face includes a housing, a support unit fixed inside the housing, a feeding unit which is opposite to the support unit and held and moved in the housing; the feeding unit is pivotally fitted at a rotary unit ahead, the rotary unit is provided with a cleaning head at the front side, the cleaning head is equipped with a pressing surface ahead, and the feeding unit allows a cleaning wire to be stretched and wound around the cleaning head as well as the pressing surface externally; the rotary unit includes a worm shaft on which guiding slots are opened wherein the guiding slots correspond to pins in the front of the support unit for holding the pins inside the guiding slots; an optical connector's end face is cleaned by the cleaning wire when the pressing surface is activated and the rotary unit is driven via the pins and the guiding slots for rotations.

Abstract: A pressing cleaner for an optical connector's end face provided in the present disclosure comprises a housing, a support unit fixed inside the housing, a feeding unit which is opposite to the support unit and held and moved in the housing; the feeding unit is pivotally fitted at a rotary unit ahead, the rotary unit is provided with a cleaning head at the front side, the cleaning head is equipped with a pressing surface ahead, and the feeding unit allows a cleaning wire to be stretched and wound around the cleaning head as well as the pressing surface externally; the rotary unit comprises a worm shaft on which guiding slots are opened wherein the guiding slots correspond to pins in the front of the support unit for holding the pins inside the guiding slots; an optical connector's end face is cleaned by the cleaning wire when the pressing surface is activated and the rotary unit is driven via the pins and the guiding slots for rotations.