To make it possible to tightly attach a bottle plug on an inner circumferential wall of a container, or to easily take the bottle plug out of the container, by moving a moving member in a longitudinal direction with respect to a body, and by expanding and constricting an elastic body in a radial direction.
An expansion bottle plug includes a body 1, an elastic body member 2 and a moving member 3 that can move in a longitudinal direction with respect to the body 1. The expansion bottle plug moves to the first step in the longitudinal direction with respect to the body 1 using the moving member 3 so that the elastic body member 2 is expanded in the radial direction. Moreover, the expansion bottle plug moves to the second step in the longitudinal direction with respect to the body 1 using the moving member 3 so that the elastic body member 2 is constricted in the radial direction.
| JP2004522660A | 2004-07-29 |
| WO2002036450A1 | 2002-05-10 | |||
| US6719160B2 | 2004-04-13 | |||
| DE1157101B | 1963-11-07 | |||
| US6536618B1 | 2003-03-25 |
Mitsuo Matsuda
Kazuo Ikeyama
Toshihiko Nakayama
Masahiko Oshikubo