A fluid dispenser device adapted for mounting at an inner top open end of an inner container and an outer top open end of an outer container that coaxially surrounds the inner container along an axis, said fluid dispenser device comprising:
- an internal cap adapted to cover the inner and outer top open ends, and having first and second internal ports which are configured to be in fluid communication with the inner and outer top open ends, respectively, and first and second valve seats which are disposed respectively on said first and second internal ports;
- a conduit unit which is configured to be axially displaceable relative to said internal cap between a normal position and a raised position, said conduit unit including
- a first conduit having a first communicating port which extends in an axial direction parallel to the axis, and which is disposed downstream of said first internal port such that said first valve seat permits fluid communication between said first internal port and said first conduit, and a first outlet which is disposed downstream of said first communicating port,
- a second conduit having a second communicating port which extends in the axial direction, and which is disposed downstream of said second internal port such that said second valve seat permits fluid communication between said second internal port and said second conduit, and a second outlet which is disposed downstream of said second communicating port,
- a first valve disposed on said first communicating port, and configured such that, when said conduit unit is displaced from the normal position to the raised position, said first valve is displaced from a first engaging position, where said first valve is engaged with said first valve seat to thereby interrupt fluid communication between said first internal port and said first communicating port, to a first disengaging position, where said first valve is disengaged from said first valve seat to thereby permit fluid communication between said first internal port and said first communicating port, and
- a second valve disposed on said second communicating port, and configured such that, when said conduit unit is displaced from the normal position to the raised position, said second valve is displaced from a second engaging position, where said second valve is engaged with said second valve seat to thereby interrupt fluid communication between said second internal port and said second communicating port, to a second disengaging position, where said second valve is disengaged from said second valve seat to thereby permit fluid communication between said second internal port and said second communicating port;
- an inner shell including upper and lower surrounding walls which are opposite to each other along the axis, said upper surrounding wall having an internally threaded segment which is in threaded engagement with said conduit unit to permit threaded movement of said inner shell relative to said conduit unit, said lower surrounding wall being configured to be retainingly slidable relative to said internal cap;
- and
- a spline mechanism disposed between said conduit unit and said internal cap such that, when said inner shell is turned about the axis for threaded movement relative to said conduit unit, said conduit unit is permitted to be displaced only axially between the normal and raised positions so as to move each of said first and second valves between a respective one of the first and second engaging positions and a respective one of the first and second disengaging positions.