Movable support structure

A movable support structure, comprising:

• a first component including a movable supporting portion and a retaining/restricting portion;
• and
• a second component including a supported portion and a receiving portion,
• wherein:
• the movable supporting portion restricts a movement toward a back side in a sliding direction of the supported portion slid toward the movable supporting portion along a first direction,
• the slid supported portion is supported movably along the first direction and a second direction orthogonal to the first direction,
• the retaining/restricting portion extends in such a posture as to gradually approach the receiving portion from a position separated from the receiving portion on a side opposite to the second component toward a sliding side of the supported portion, and
• a retaining surface formed on a tip of the retaining/restricting portion is capable of contacting the receiving portion in a direction to detach the supported portion to retain the supported portion with the supported portion slid toward the movable supporting portion,
• wherein in a retained position, the receiving portion is movable in a predetermined range away from the retaining surface along the first direction.