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US 2025/0059962 A1Published application
Liquid supply device
AssigneeKoganei Corporation
InventorTakeo YAJIMA
Life of this patent
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Abstract
A liquid supply device 10 has a pump unit 11 in which a plurality of pump members are provided; a housing 15 in which a plurality of drive rods for driving the pump members are integrated; a drive roller 32 which rotation about a center rotation axis in a direction lateral to a reciprocation direction of the driving rod; a cam member 43 on whose end surface a cam surface 48 contacted with the drive roller 32 is provided; a magnet 66 provided on an outer peripheral portion of the cam member 43; and a magnetic sensor 71 that senses a magnetic field of the magnet 66 to output a rotation signal.
Claims6
A liquid supply device comprising:
- a pump unit provided with a plurality of pump members for expanding and contracting respective pump chambers;
- a housing incorporating a plurality of drive rods for driving the plurality of pump members at different timing;
- a drive roller provided on the drive rods and rotating around a rotation center axis in a direction lateral to a reciprocating direction of the drive rod;
- a cam member whose end surface a cam surface contacted by the drive roller is provided on and that is rotated around a rotation center axis parallel to the reciprocating direction of the drive rod by a rotation drive source;
- a magnet provided on an outer peripheral portion of the cam member;
- and
- a magnetic sensor provided in the housing and sensing a magnetic force of the magnet to output a rotation signal.
4 more elements
Dependencies are inferred from the claim text.