Hand-held device for the local heat-treatment of the skin

Claim 1

A hand-held device for the local heat treatment of a patient's skin which device comprises: (a) a casing having a bottom wall the outer face of which contains a treatment face; (b) a handle part which is connected to the casing at a part thereof spaced from the bottom wall of the latter; as well as (c) an electric heating unit in the interior of the casing which unit comprises (i) a power transistor, a cooling vane and a heat sensor unit adapted for measuring the temperature of the treatment face; said power transistor comprising an encapsulating hull being of heat-conductive material and being integral with said cooling vane, and said cooling vane being of a flat configuration and in planar contact with the inner surface of said bottom wall; and the heat sensor unit being arranged spaced from said cooling vane on the inner surface of the bottom wall of the casing in direct physical contact with said bottom wall; and (ii) an electric circuit means disposed in the interior of the casing which circuit means is adapted for controlling electric current flow in the power transistor in response to any temperature variations of the treatment face of the bottom wall detected by said heat sensor unit, said electric circuit means being connected with the power transistor and the heat sensor unit, and comprising connecting means adapted for connecting said circuit means with a source of low voltage direct current, and a poured-in synthetic resin filling in the lower part of said casing, embedding said power transistor, cooling vane and electric circuit means and filling the space between said cooling vane and said heat sensor unit.