Application Container Sealing Structure for Pre-Use Impregnation

The patent enables preliminary impregnation of the application member with content liquid before use by inverting or shaking the container while the overcap is still mounted. The overcap regulates the holder's rise during this process, allowing the application member to absorb content liquid through the communication hole while the discharge hole remains closed. This preliminary action resolves the contradiction by separating the impregnation phase from the usage phase, eliminating the need for constant communication between holes.

The patent employs a dynamic valve mechanism where the plug body can move between open and closed positions based on holder displacement. During impregnation, the holder is in a lower position allowing communication; during use, the holder rises and the plug body closes the communication hole while the overcap closes the discharge hole. This dynamic adjustment resolves the contradiction by adapting the communication state to the operational phase.

The patent enables self-service impregnation where the user simply inverts or shakes the container without manually operating any valves or buttons. The overcap-mounted configuration automatically allows content liquid to flow to the application member through gravity and vibration, and the valve mechanism automatically closes during use. This eliminates the need for manual valve operation while maintaining reliable leakage prevention.

The patent performs the impregnation action preliminarily before the actual use phase by allowing content liquid to be loaded into the application member while the overcap is mounted. This preliminary impregnation eliminates the need for manual valve opening during the usage phase, as the application member is already saturated with content liquid ready for immediate use.

The patent introduces the overcap as an intermediary element that mediates between the discharge hole and the external environment. The overcap includes a through hole that can be selectively opened or closed to control discharge, while simultaneously serving as a physical stop to regulate the holder's maximum rise position. This intermediary structure resolves the contradiction by providing both discharge functionality and position control without requiring separate mechanisms.

The overcap performs multiple functions simultaneously: it closes the discharge hole when mounted, regulates the holder's rise position through physical contact, and can be removed or opened to enable discharge. This multi-functionality resolves the contradiction by integrating both discharge control and holder position regulation into a single component, eliminating the need for separate control mechanisms.