| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin cap which can be opened easily when a consumer opens a top cover for the first time, while preventing a weakened part formed in an opening planned part from breaking when manufacturing the synthetic resin cap.SOLUTION: An inner plug part 3 comprises an opening planned part 22. The opening planned part 22 comprises a separation piece 24 connected through a weakened part. The separation piece 24 comprises a projection part 25 and a hole part 26. A cover part 2 comprises a base part 2 and a top cover 4. The base part 2 comprises an insertion port part 18 in which the separation piece 24 is formed insertably. The top cover 4 comprises a top wall 7. A hook part and a guide projection 13, which is provided inward from the hook part, are provided on an inner surface of the top wall 7. When coupling the cover part 2 and the inner plug part 3, the guide projection 13 is inserted into the hole part 26, and the projection part 25 and the hook part are engaged.SELECTED DRAWING: Figure 1 |
