Panel module unit

A panel module unit comprising

• a housing part serving as an outer cover of the panel module unit;
• a first panel part;
• a second panel part;
• and
• an intermediate cover, wherein
• the first panel part, the second panel part, and the intermediate cover are housed in the housing part in order from a front side to a rear side,
• the housing part comprises:
• an annular side wall;
• a front opening provided on the front side in such a manner that the first panel part is seen from the front side;
• a frame provided around the front opening;
• and
• at least one fixing means attached on an inner peripheral surface of the side wall of the housing part and not a front wall of the housing part, the fixing means being a means for fixing a position of the intermediate cover in the housing part,
• the second panel part is housed between the first panel part and the intermediate cover,
• a position of the second panel part is indirectly fixed by the intermediate cover, and
• the second panel part is provided with a biasing means for biasing the first panel part from the rear side toward the front side.