JP2790794B

PROBLEM TO BE SOLVED: To provide a container having an excellent water leakage-preventing function and an excellent fitting force and improve the impact resistance of the container by forming the cross-sectional shape of a projected stripe into a keyhole shape comprising a rim and a substantially circular swollen portion provided at a top end thereof, providing a connection between the rim and the swollen portion in the form of a waist portion, and forming a recessed stripe provided on a lid into a shape substantially similar to that of the projected stripe. SOLUTION: A projected stripe 35 of a container main body 30 is formed into a so-called keyhole shape having a swollen portion 35b whose cross section is substantially circular and which is provided at a top end of a rim 35a provided at a substantially right angle with a flange 34. A waist portion 35c is formed at a connection of the swollen portion with the rim 35a. A recessed stripe 45 of a lid 40 has a size and a shape capable of being received by the projected stripe 35 in a pressure contact state without leaving any gap. Particularly, a swollen portion 45b of the recessed stripe 45 is so formed that it can be brought into close contact with an outer face of the swollen portion 35b of the projected stripe 35. Accordingly, when the projected stripe 35 is engaged with the recessed stripe 45, the swollen portions 35b and 45b are brought into spherical contact with each other, and no gap is formed by an uneven pressure contact face. Further, the engagement between the swollen portions 35b and 45b are securely kept by the locking between the waist portion 35c and a waist portion 45c of the recessed stripe 45.