| 摘要 |
A dermal applicator 20 comprises a housing 22 having a retainer 45 configured to hold and engage positively a spherical surface. A reservoir contains a liquid 28, within a shell 26 that is at least partially spherical. The shell 26 is configured to he engaged within the retainer 45 to permit relative rotation of the shell 26 with respect to the housing 22. Preferably, the shell further includes an outwardly protruding lug (32, fig.3a) extending from its surface, and the housing is configured to form an orbital chamber (52, fig.3a) between an inner surface thereof and the shell 26 when the shell is retained in the retainer 45. The protruding lug (32, fig.3a) is constrained within the orbital chamber (52, fig.3a) such that rotation of the shell 26 relative to the housing is restricted. The liquid is selected to have at least one of a freezing point below 0°C and a specific latent heat of fusion higher than that of water. The liquid may be a salt solution, a gel composition or a polyol. Rotation of the shell locally massages skin causing vasoconstriction and/or vasodilation, which encourages vascular micro-circulation in the skin tissue. |
