| 摘要 |
The mechanism comprises a chassis and a frame fastened pivotably to the chassis and having a door member holding portion at a free end thereof. A door member consists of a cross-sectionally L-shaped operating portion with projections on both side surfaces thereof, and a mounting portion is slidably held in the door member holding portion of the frame. A coiled spring is provided between pivotable frame and door member so as to constantly urge the door member against a rear surface of a front panel.
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