| 摘要 |
PROBLEM TO BE SOLVED: To provide a container capable of reducing opening force during opening.SOLUTION: A container 1 comprises: a seal part 27 for sealing an extraction port 11b from which a content in a container body 10 is extracted; and an upper lid 20 for covering the extraction port 11b. The upper lid 20 has a first screw part 51 screwed to the container body 10 side, and supports the seal part 27. The container body 10 side has a second screw part 52 screwed to the first screw part 51, the first and second screw parts 51, 52 have multi-row screws. On one of the first and second screw parts 51, 52, at least one row of threads are formed so that a width of thread becomes larger than a thread reference width, from a position where inclination of the upper lid 20 is started when loosening, to a root side where the upper lid 20 is loosened to the container body 10, at least one row of second threads are formed so that a width of thread becomes smaller than the thread width of the first threads, from the position where inclination of the upper lid 20 is started, to the root side. On a tip end when the upper lid 20 is loosened to the container body 10, thread widths of all threads are almost equal.SELECTED DRAWING: Figure 2 |
