PURPOSE: To facilitate the operation of knobs while saving the space for a main equipment body by arranging various knobs on the bottom surface of the storage box of a remote control oscillator.

CONSTITUTION: When the remote control oscillator 2 is fitted to a cover 16 for blinding and pressed in, a push lock switch is locked as shown by (a). When the remote control oscillator 2 is further pressed in said state, the switch is unlocked and the cover 16 for blinding turns to project almost the half of the remote control oscillator 2 out of the storage box 12 as shown by (b). While the remote control oscillator 2 is detached as shown by (c), the cover 16 closes the opening of the storage box 12, so an unlock lever is pressed to turn a lock lever 21 when a knob 15 is operated, disengaging a locking piece 23 from a locked piece 20 as shown by (d). Thn, the cover 16 for blinding is opened manually to operate the knob 15 in the storage box 12.