Manually operable dosing device for a medium

Abstract

1. Dosing device for a medium. 2.1. A dosing device for a medium with an applicator housing, which has at least one discharge opening for dispensing the medium, with a pumping means, which has a pumping chamber arranged in the applicator housing, and with an elastically flexible membrane, which forms a wall portion of the pumping chamber and is arranged in an elastically movable manner in the applicator housing for changing a chamber volume of the pumping chamber and which is assigned on an outer side facing away from the pumping chamber an actuating surface for a manual pumping movement, is known. 2.2. According to the invention, the applicator housing has a flow path from the pumping chamber to the discharge opening, and the membrane forms an outlet valve of the pumping chamber. 2.3. Use for dosing media for cosmetic purposes.

1 . A manually operable dosing device for a medium with an applicator housing, which has at least one discharge opening for dispensing the medium, with a pumping means, which has a pumping chamber arranged in the applicator housing, and with an elastically flexible membrane, which forms a wall portion of the pumping chamber and is arranged in an elastically movable manner in the applicator housing for changing a chamber volume of the pumping chamber and which is assigned on an outer side facing away from the pumping chamber an actuating surface for a manual pumping movement, wherein the applicator housing ( 3 ,  3   c ,  3   d ,  4 ,  4   a ,  4   b ,  4   c ,  4   d ,  5 ,  5   c ,  5   d ) has a flow path ( 17 ,  17   a ,  17   b ,  17   c ,  17   d ) from the pumping chamber ( 7 ,  7   c ,  7   d ) to the discharge opening ( 18 ,  18   a ,  18   b ,  18   c ,  18   d ), and wherein the membrane ( 6 ,  6   c ,  6   d ) forms an outlet valve of the pumping chamber.  
   
   
       2 . The dosing device as claimed in  claim 1 , wherein the applicator housing has a ventilating channel ( 16 ,  16   c ,  19 ), leading to a medium reservoir ( 2 ), and wherein the membrane forms a ventilating valve ( 14 ,  14   c ,  14   d ,  15 ,  15   c ,  15   d ) for the ventilating channel.  
   
   
       3 . The dosing device as claimed in  claim 1 , wherein the applicator housing is provided with a spray nozzle ( 18 ,  18   b ,  18   d ) as the discharge opening.  
   
   
       4 . The dosing device as claimed in  claim 1 , wherein the applicator housing is provided with a discharge opening ( 18   a ,  18   c ) designed for medium of high viscosity.  
   
   
       5 . The dosing device as claimed in  claim 1 , wherein the actuating surface ( 12 ,  12   c ,  12   d ) of the membrane is arranged in a clearance of the applicator housing and, in the state of rest in which no pressure is exerted, is aligned in particular such that it is flush with an outer contour of the applicator housing.  
   
   
       6 . The dosing device as claimed in  claim 1 , wherein the membrane is produced from an elastomer material as a one-piece, bell- or dome-shaped component.  
   
   
       7 . The dosing device as claimed in  claim 1 , wherein the applicator housing is of a multi-part design, and wherein the membrane is restrained coaxially between an inner part ( 5 ,  5   c ,  5   d ) and an outer part ( 4 ,  4   a ,  4   c ,  4   d ) of the applicator housing.  
   
   
       8 . The dosing device as claimed in  claim 5 , wherein the actuating surface of the membrane is provided on the outside of a restraining region of the membrane in the applicator housing and a lip portion ( 13 ) forming the outlet valve is provided within the restraining region, and wherein the restraining region of the membrane is designed in particular as a solid joint.  
   
   
       9 . The dosing device as claimed in  claim 5 , wherein a sealing portion ( 14 ,  14   c ,  14   d ) of the membrane that is provided in the region of the clearance of the applicator housing is provided as a ventilating valve for the ventilating path, which closes the latter when no pressure is exerted on the membrane and opens it when the membrane is manually deformed.  
   
   
       10 . The dosing device as claimed in  claim 1 , wherein the membrane ( 6   c ,  6   d ) is produced in one piece from an elastomer material and has a bellows region ( 23   c ,  23   d ), on which at least one peripheral or helical groove is formed.  
   
   
       11 . The dosing device as claimed in  claim 10 , wherein the membrane has, in a preferably annular transitional region ( 26   c ,  26   d ) between the bellows region and a lip portion ( 13   c ), at least one groove, running at least partly around the periphery, to isolate the movement between the bellows region and the lip portion.  
   
   
       12 . The dosing device as claimed in  claim 1 , wherein at least two lip portions ( 13 . 1 ,  13 . 2 ), which have different geometries, are provided on the membrane ( 6 ,  6   a ,  6   b ,  6   c ,  6   d ).  
   
   
       13 . The dosing device as claimed in  claim 1 , wherein at least one sealing element ( 27   c ) is provided on the applicator housing ( 5 ,  5   a ,  5   b ,  5   c ,  5   d ) to separate an annular gap portion, provided for guiding the medium, from an annular gap portion that is free of the medium.