Container holder

A container holder comprising:

• a case having a receiving space opened upward, a side wall defining at least a part of the receiving space, and a support opening formed on the side wall;
• a support member configured to change a state thereof between a developed position where the support member is partially exposed to the receiving space through the support opening, and a retracted position in which an amount of exposure of the support member to the receiving space is smaller than an amount of exposure of the support member to the receiving space at the developed position;
• and
• a spring member configured to urge the support member to the developed position,
• wherein the case has a pair of attachment walls disposed on both side portions of the support opening and provided in a standing manner on an outer surface of the side wall,
• each of the attachment walls has:
• a spring attachment portion protruding from each of rear surfaces of the facing attachment walls;
• an upper stopper groove having a recessed shape and being located at a level higher than a level of the spring attachment portion;
• and
• a lower stopper groove having a recessed shape and being located at a level lower than a level of the spring attachment portion,
• the spring member is formed of a double torsion spring in which two torsion springs each having a coil portion and two leg portions are juxtaposed, and one leg portions of the torsion springs are connected to each other by a connecting leg portion, each of the coil portions of the torsion springs being pivotally supported by the spring attachment portion,
• the support member is held between the attachment walls and the spring member, and
• the support member has:
• a pair of upper stopper protrusions detachably latched in the pair of upper stopper grooves;
• and
• a pair of lower stopper protrusions detachably latched in the pair of lower stopper grooves.