Syringe device for communicating two types of substances to each other and method thereof

A syringe device comprising:

• an administration holder including a first storage chamber including a first cartridge mounted therein, the first cartridge being configured to store a first substance and having a first sealing member formed at a front end portion thereof;
• a double-ended needle assembly including a first needle point and a second needle point;
• and
• a cylinder portion, which is hollow and includes:
• a holder sliding portion configured to slidably retain the administration holder inserted at least partly from a first end of the cylinder portion;
• a second storage chamber provided on a second end of the cylinder portion that is opposite to the first end, the second storage chamber including a second cartridge mounted therein, the second cartridge being configured to store a second substance and having a second sealing member formed at a front end portion thereof facing the front end portion of the first cartridge;
• and
• a double-ended needle sliding portion formed between the holder sliding portion and the second storage chamber, the double-ended needle assembly being capable of sliding in the double-ended needle sliding portion from a first position to a second position while the first needle point faces the holder sliding portion and the second needle point faces the second storage chamber;
• wherein, when the administration holder is pushed inward in the holder sliding portion toward the second storage chamber, the double-ended needle assembly is moved from the first position by a force generated by the first needle point being pushed by the first sealing member of the first cartridge while the first needle point is maintained in a first state in which the first needle point pricks the first sealing member without unsealing the first sealing member,
• wherein, by being continually moved, the double-ended needle assembly achieves a closed state in which the first needle point is maintained in the first state and the second needle point pricks the second sealing member of the second cartridge without unsealing the second sealing member, and
• wherein, after achieving the closed state, the double-ended needle assembly continues moving to the second position, and achieves a communicating state in which the first sealing member of the first cartridge is unsealed by the first needle point and the second sealing member of the second cartridge is unsealed by the second needle point.