US Patent 12114764 Skin treatment head with integrated release system

A unit of a body care device, operating a skin treatment head coupled to or integrated with the unit, includes a first connector element detachably coupling to a second connector element of a housing of the body care device to provide functional coupling of the housing and the unit; a chamber with a chamber volume for hosting a material, the chamber including a first chamber opening with a check valve; a mechanical actuator configured to transfer a force on the skin treatment head in a direction of the first connector element onto the material to expel at least part of the material via the at least one first chamber opening out of the chamber; a channel system for providing a fluid connection between the chamber and the at least one first chamber opening; and a first valve for controlling the fluid connection between the chamber and the first chamber opening.