Cap for aerosol can with broken stem

Abstract

This provides a cap that allows the use of aerosol cans with broken stems. [Solution] The cap 1 is fitted onto an aerosol can 2 with a broken stem 21 and comprises a mounting body 10 that is fitted to prevent accidental detachment and a broken stem pressing shaft 11 for pressing down the broken stem 21'. The broken stem pressing shaft 11 is supported by the mounting body 10 and is positioned coaxially with the broken stem 21' of the aerosol can 2 and movable in the same axial direction as the broken stem 21'. The tip of the broken stem pressing shaft 11 has an outer diameter smaller than the inner diameter of the tip opening hole 200a of the mountain cup, and when the aerosol is sprayed, the broken stem pressing shaft 11 is displaced downward to press down the broken stem 21'. In addition, when the aerosol is sprayed, the cap 1 has a portion that tightly adheres in a closed annular shape to at least one of the stem gasket 22 of the aerosol can 2 and the central projection 200 of the mountain cup 20.

Claims

1. A cap to be attached to an aerosol can whose stem has broken and rendered unusable, comprising a mounting body that fits onto a mountain cup that forms the upper end of the aerosol can body, and a broken stem pressing shaft for pressing down the broken stem, (1) When the side wall of the mounting body is fitted over the outer circumference of the flange of the mountain cup, the innermost radius of the inner circumference of the side wall of the mounting portion, with respect to the axis of the broken stem pressing shaft, is smaller than the outermost radius of the flange. (2) When the side wall is fitted into the inner circumference of the cylinder of the mountain cup, the outermost radius of the outer circumference of the side wall of the mounting portion, with respect to the axis of the broken stem pressing shaft, is greater than the innermost radius of the inner surface of the flange. (3) When the side wall is fitted over the central projection of the mountain cup, the innermost radius of the inner circumference of the side wall of the mounting portion, with respect to the axis of the broken stem pressing shaft, is smaller than the outermost radius of the central projection. In addition to satisfying the above conditions, the broken stem pressing shaft is supported by the mounting body, and when the mounting body is fitted onto the mountain cup, it is arranged to be coaxial with and movable in the same direction as the broken stem of the aerosol can, the tip of which has an outer diameter smaller than the inner diameter of the tip opening of the mountain cup, the broken stem pressing shaft is displaced downward when the aerosol is sprayed, pushing down the broken stem and enabling the spraying of the contents of the aerosol can, and in the state when the aerosol is sprayed, it has a portion that tightly adheres in a closed annular shape to at least one of the stem gasket of the aerosol can and the central projection of the mountain cup.

2. In a state in which the mountain cup is fitted and the tip surface of the broken stem pressing shaft is in light contact with the broken stem or the stem gasket, In the case where the mounting body is fitted over the outer circumference of the flange of the mountain cup, a gap is provided between the cap and the upper surface of the flange. In the case where the mounting body is inserted into the inner circumference of the cylinder of the mountain cup or where the mounting body is fitted over the outer circumference of the central protrusion of the mountain cup, a gap is provided between the bottom surface of the mountain cup and the lower end surface of the side wall of the mounting body. A cap for a stem-broken aerosol can according to claim 1, characterized by the above.

3. The cap for a stem-broken aerosol can according to claim 1 or 2, characterized in that a surface extending substantially radially around the axis of the broken stem-pressing shaft, from the base of the broken stem-pressing shaft toward the side wall of the cap, has a surface that is elastically capable of bending and deforming.

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