Liquid applicator with slidable pump mechanism

In a writing instrument or an applicator comprising:

• a shaft sleeve inside which is disposed a reservoir for an application liquid;
• and an application member provided in a front end of said shaft sleeve to receive said application liquid supplied from said reservoir;
• the improvement comprising:
• an ink conduit member provided with a large-diameter piston portion positioned at its rear end, a hollow rod portion projected forward from said large-diameter piston portion and being smaller than the same in diameter, and a communication-hole opening in both a front end and an outer peripheral surface of said hollow rod portion and containing a check valve unit therein;
• a cup-like member for slidably receiving said ink conduit member therein, said cup-like member being slidably and hermetically received in said shaft sleeve and having a length enabling said ink conduit member to extend said piston portion thereof axially beyond said cup-like member when said cup-like member is positioned at its most forward position relative to said ink conduit member;
• means for moving said cup-like member axially relative to said shaft sleeve;
• means for biasing said cup-like member and said ink conduit member so as to be separated from each other;
• and
• a holder for receiving said application member, said holder being connected to a front end portion of said ink conduit member projected from said cup-like member, to make it possible that an interior space of said holder communicates with said communication-hole of said ink conduit member.