Patent ID: 7708486
Filing Date: 2010-05-04
Classification: A45D,B29C,B29L,B43K

Abstract:
1. An airtight cap structure, comprising: a cap; and a use end portion of an end portion of a main body, said use end portion detachably covered by the cap such that drying up of the use end portion is prevented, wherein at least one of the cap and a vicinity of the use end portion of the main body comprises: wherein, in a state in which the cap is attached to the main body, said soft portion of the one of the cap and the vicinity of the use end portion of the main body contacts a corresponding surface of an other one of the cap and the main body such that an air tight seal is formed between said soft portion and said corresponding surface, wherein said soft portion comprises a first part of an internal surface portion and a first part of an external surface portion of the cap, wherein the first part of the internal surface portion and the first part of the external surface portion are connected with each other through a communicating portion penetrating into the hard portion, and wherein said hard portion comprises a second part of the internal surface portion of the cap and a second part of the external surface portion of the cap.