Discharge head for a liquid dispenser and liquid dispenser having such a discharge head

A liquid dispenser for dispensing cosmetic or pharmaceutical liquids, said liquid dispenser comprising:

• a liquid store;
• and
• a discharge head having a housing formed integrally with or detachably coupled to said liquid store, said discharge head comprising:
• a discharge opening through which liquid is dispensed into a surrounding atmosphere;
• an inlet region disposed adjacent said liquid store;
• an outlet channel extending from said inlet region to said discharge opening, said outlet channel being configured to supply said discharge opening with liquid from said liquid store;
• and
• a throttle device disposed in said outlet channel, said throttle device being configured to accommodate liquid flow therethrough in a first direction towards said discharge opening and in a second direction towards said inlet region, said throttle device having a throttle channel with a variable cross-sectional configuration, said throttle device being configured for switching between a throttling state and a release state to vary said cross-sectional configuration of said throttle channel and produce a throttling effect on liquid flowing through said throttle device and said throttle channel, said throttling effect comprising a reduction in a pressure and/or a flow of liquid flowing through said throttle device and said throttle channel, said throttle device in said throttling state causing said throttling effect on liquid flowing in said first direction through said throttle device and said throttle channel, said throttle device in said release state causing said throttling effect on liquid flowing in said second direction through said throttle device and said throttle channel, said throttling effect in said release state being less than said throttling effect in said throttling state.

A discharge head for a liquid dispenser, said discharge head comprising:

• a housing;
• a coupling device configured to attach said discharge head to a liquid store;
• a discharge opening through which liquid is dispensed into a surrounding atmosphere;
• an inlet region into which liquid from the liquid store enters said discharge head;
• an outlet channel configured to provide communication between said discharge opening and said inlet region;
• and
• a throttle device disposed in said outlet channel between said inlet region and said discharge opening such that liquid stored in the liquid store flows through said throttle device, said throttle device comprising a throttle channel which accommodates liquid therein, said throttle device being configured for switching between a throttling state and a release state to produce a throttling effect comprising a reduction in liquid pressure and/or liquid flow of the liquid flowing through said throttle device and said throttle channel, said throttle channel in said throttling state of said throttle device having a first fluid-accommodating cross-sectional configuration to produce said throttling effect on liquid flowing through said throttle device and said throttle channel in a direction towards said discharge opening, and said throttle channel in said release state of said throttle device having a second fluid-accommodating cross-sectional configuration, different from said first fluid-accommodating cross-sectional configuration, to produce said throttling effect on liquid flowing through said throttle device in a direction towards said inlet region, said throttling effect in said release state of said throttle device being less than said throttling effect in said throttling state of said throttle device.