Abstract: A fiber optic adapter includes a shielding casing that is connected to a casing body and that defines a through channel. Two engagement members extend from a casing body and extend through the through channel. A pivot shaft engages the shielding casing. A shielding plate is connected to the pivot shaft. A restoring member is sleeved on the pivot shaft. The shielding plate is pivotable about the pivot shaft against a resilient force of the restoring member from a shielding position to an open position relative to the shielding casing. When the shielding plate is in the shielding position, the shielding plate is disposed between the engagement members and shields the through channel. When the shielding plate is in the open position, the shielding plate opens the through channel.

Abstract: A fiber optic adapter includes an outer housing, a receiving seat, and a blocking mechanism. The outer housing defines two connection slots. The receiving seat is connected detachably to the outer housing, and defines two through grooves respectively in spatial communication with the connection slots. The blocking mechanism includes a pivot shaft, a torsion spring sleeved on the pivot shaft, and two cover plates connected pivotally to the pivot shaft and respectively connected to two opposite ends of the torsion spring. When each cover plate is in a blocking position, the cover plate blocks a respective connection slot, and is inclined relative to a central axis of the respective connection slot with a free end thereof being more towards the rear than the pivot shaft, and with an angle that is defines between the cover plate and the central axis being not a right angle.