Claims

1. A tube-type container having a check function, comprising:a body (100) containing contents in liquid state;an extension tube (200), located at the upper end of the body (100), having a passage (210) through which the contents passes from the body (100);a discharge cap (300), heretically connected to the upper end of the extension tube (200), forming a discharge passage (310), through which the contents are discharged to the outside, at its upper end;a cover (400), screw-coupled to the outer surface of the extension tube (200), preventing foreign matter from flowing into the body (100);wings (320) that are inwardly protrudently formed on the inner wall of the discharge cap (300) and regularly spaced apart from each other, a space formed between the wings (320);a fixing member (500) fitted into the wings (320);an operating member (600) whose upper end is inserted into the fixing member (500) and whose lower end forms a closing plate (610) for closing the passage (210); anda spring (700) placed between the operating member (600) and the fixing member (500) for allowing the operating member (600) to elastically tightly close the passage (210).

2. The tube-type container according to claim 1, further comprising an O-ring (330) between the discharge cap (300) and the extension tube (200).

3. The tube-type container according to claim 1, wherein the discharge cap (300) forms a locking step (340), protrudent outward, on its outer surface, which prevents the discharge cap (300) from being removed from the extension tube (200).

4. The tube-type container according to claim 1, wherein the closing plate (610) of the operating member (600) is formed such that its lower surface is concave.

5. The tube-type container according to claim 1, further comprising an closing O-ring (800) between the operating member (600) and the fixing member (500), which prevents the contents from contacting the spring (700).