US Patent 7798356 Tubular case

A cylindrical case receives a stick in a reciprocating manner so through an opening of the case. A cap is arranged to engage with the opening of the case. Engagement release of the cap is carried out by rotating an operating member. The operating member includes a peripheral member and an operating force imparting portion continuous with the peripheral member mounted on an upper portion of the case. When the operating force imparting portion is pressed downward, force apply points opposite to the operating force imparting portion impart a push-up force to the cap thereby releasing the cap from the engagement with the case.