Two-Component Mixing Container Including Piston Using Spring Engagement

A two-component mixing container comprising:

• a housing including:
• a first cylindrical portion having a first opening portion at one end thereof;
• a mixing chamber provided inside the housing and configured to contain a first component and to mix the first component and a second component when the second component is injected from the one end of the first cylindrical portion;
• and
• a first bottom wall portion closing the other end of the first cylindrical portion and having a discharge port configured to discharge a mixture of the first component and the second component from the mixing chamber;
• a nozzle provided at the housing and configured to discharge the mixture, whereby the mixture comes out of the discharge port and is discharged through the nozzle;
• a partition wall member held in the first cylindrical portion and including:
• a second cylindrical portion having a second opening portion at one end thereof;
• a second bottom wall portion closing the other end of the second cylindrical portion;
• and
• a partition wall portion provided at the second bottom wall portion, whereby the partition wall portion slides liquid-tightly inside the mixing chamber;
• a second-component containing member held in the second cylindrical portion and including:
• a third cylindrical portion having a third opening portion at one end thereof;
• a third bottom wall portion closing the other end of the third cylindrical portion;
• and
• a second-component containing chamber provided inside the second-component containing member and configured to contain the second component;
• a piston member including:
• a piston portion located at one end of the piston member and configured to be inserted into the third cylindrical portion from the third opening portion and liquid-tightly slide inside the third cylindrical portion;
• and
• an operating rod portion located at the other end of the piston member and projecting out from the third opening portion;
• and
• a holding structure configured to hold the partition wall member in a fixed state with respect to the housing until the second component is injected into the mixing chamber and to release the fixed state when the mixture is discharged from the nozzle, wherein:
• two or more spring structure portions are provided at the operating rod portion of the piston member and arranged at equal intervals in a peripheral direction of the piston portion, the two or more spring structure portions each having a contact portion and being configured to deform by contact between an inner wall portion of the third cylindrical portion and the contact portion and thereby impart a pressing force on an inner wall surface of the third cylindrical portion when the piston portion is inserted from the third opening portion;
• two or more fitting grooves are formed in the third cylindrical portion at equal intervals in a peripheral direction of the third cylindrical portion, whereby the contact portions are fitted in the two or more fitting grooves when the contact portions are inserted into the two or more fitting grooves;
• and
• the spring structure portions and the fitting grooves are configured such that the piston member and the second-component containing member rotate together without the contact portions getting out of the fitting grooves when the operating rod portion is rotated about an axis line with the contact portions fitted in the fitting grooves, and the contact portions get out of the fitting grooves when a force of a predetermined level or higher toward the third bottom wall portion is applied to the operating rod portion with the second-component containing chamber and the mixing chamber being communicable with each other after the second-component containing member has been rotated by a predetermined rotation angle.