Liquid Cosmetic Applicator

Abstract

A liquid cosmetic applicator includes a housing unit, an applicator head connected to the housing unit, a reservoir unit, a switching unit, and a pressure unit. The reservoir unit is movable and includes a cartridge. The switching unit is connected to the housing unit and is operable for driving movement of the reservoir unit toward the applicator head. The pressure unit includes a stationary pressure base and a resilient member for biasing the reservoir unit away from the applicator head. The stationary pressure base is disposed between the reservoir unit and the applicator head, and has a pressure rod portion extending into the liquid chamber, and an outlet channel fluidly communicating with the liquid chamber and the applicator head.

What is claimed is: 
     
         1 . A liquid cosmetic applicator comprising:
 a housing unit having a receiving space;   an applicator head connected to said housing unit;   a reservoir unit disposed movably within said receiving space and including a cartridge, said cartridge defining a liquid chamber that is adapted for retaining liquid cosmetic and that has an outlet end in proximity to said applicator head;   a switching unit connected to said housing unit and operable for driving movement of said reservoir unit toward said applicator head; and   a pressure unit disposed within said receiving space and including
 a stationary pressure base that is disposed between said reservoir unit and said applicator head, and that has a pressure rod portion extending into said liquid chamber through said outlet end, and an outlet channel extending therethrough and fluidly communicating with said liquid chamber and said applicator head, and 
 a resilient member that is disposed for biasing said reservoir unit away from said applicator head. 
   
     
     
         2 . The liquid cosmetic applicator as claimed in  claim 1 , wherein said reservoir unit further includes an end base disposed at said outlet end of said liquid chamber, and having a guiding channel that extends therethrough and that fluidly communicates with said liquid chamber, said pressure rod portion of said stationary pressure base extending fittingly into said guiding channel and engaging said guiding channel in a leak-tight manner. 
     
     
         3 . The liquid cosmetic applicator as claimed in  claim 2 , wherein:
 said reservoir unit further includes a stopper; and   said reservoir unit is movable relative to said applicator head between a distal position, where said cartridge is distal from said applicator head and where said stopper engages and obstructs said guiding channel, and a proximate position, where said cartridge is proximate to said applicator head and where said stopper is disengaged from said guiding channel by said pressure rod portion of said stationary pressure base.   
     
     
         4 . The liquid cosmetic applicator as claimed in  claim 3 , wherein:
 said stationary pressure base further has a ring portion that has opposite first and second sides, and an abutment portion that extends from said first side of said ring portion and that abuts against said applicator head;   said pressure rod portion extends from said second side of said ring portion into said liquid chamber, said outlet channel extending through said pressure rod portion, said ring portion and said abutment portion; and   said resilient member is sleeved on said pressure rod portion and has opposite ends that abut respectively and resiliently against said second side of said ring portion and said reservoir unit.   
     
     
         5 . The liquid cosmetic applicator as claimed in  claim 4 , wherein:
 said housing unit includes a main housing body, and a head-mounting seat that is mounted with said applicator head, that is coupled to said main housing body, and that cooperates with said main housing body to define said receiving space; and   said liquid cosmetic applicator further comprises a cap that is removably coupled to said head-mounting seat for enclosing said applicator head.   
     
     
         6 . The liquid cosmetic applicator as claimed in  claim 1 , wherein:
 said stationary pressure base further has a ring portion that has opposite first and second sides, and an abutment portion that extends from said first side of said ring portion and that abuts against said applicator head;   said pressure rod portion extends from said second side of said ring portion into said liquid chamber, said outlet channel extending through said pressure rod portion, said ring portion, and said abutment portion; and   said resilient member is sleeved on said pressure rod portion and has opposite ends that abut respectively and resiliently against said second side of said ring portion and said reservoir unit.   
     
     
         7 . The liquid cosmetic applicator as claimed in  claim 6 , wherein:
 said housing unit further includes a main housing body, and a head-mounting seat that is mounted with said applicator head, that is coupled to said main housing body, and that cooperates with said main housing body to define said receiving space; and   said liquid cosmetic applicator further comprises a cap that is removably coupled to said head-mounting seat for enclosing said applicator head.