Wall-Mountable Device

A wall-mountable device that is mountable on a wall having a first wall surface directed to a first direction and a second wall surface directed to a second direction as an opposite direction of the first direction and formed with an opening penetrating the first wall surface and the second wall surface, the device comprising:

• a frame;
• a first screw member and a second screw member coupled to each other on a screw axis in order to attach the frame to the wall;
• and
• an operating mechanism comprising an operating portion exposable from the frame toward the first direction, the operating mechanism being capable of controlling a rotational position of the second screw member about the screw axis between a first rotational position and a second rotational position by operating the operating portion;
• wherein the frame comprises an opposed portion arranged so as to face the first wall surface of the wall;
• and an insertion protrusion protruding from the opposed portion toward the second direction and being insertable into the opening,
• the opposed portion has a first fastening portion configured to face a periphery of the opening of the first wall surface,
• the insertion protrusion forms an insertion hole extending along the screw axis,
• the first screw member is inserted into the insertion hole along the second direction and threadedly engaged with the second screw member,
• the second screw member comprises a second fastening portion configured to face the first fastening portion at the first rotational position and avoid facing the first fastening portion at the second rotational position, and
• the wall is fastened directly or indirectly between the first fastening portion of the opposed portion and the second fastening portion of the second screw member having been displaced to the first rotational position.