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US 12,523,202 B2Granted
Liquid supply device
AssigneeKoganei Corporation
InventorTakeo Yajima
Life of this patent
Estimating the term…
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.
Claims9
A liquid supply device comprising:
- a pump unit provided with a first pump member for expanding and contracting a first pump chamber and a second pump member for expanding and contracting a second pump chamber;
- a housing incorporating a first drive rod and a second drive rod for driving the first pump member and the second pump member at different timing;
- a first drive roller provided on the first drive rod and rotating around a rotation center axis in a direction lateral to a reciprocating direction of the first drive rod;
- a second drive roller provided on the second drive rod and rotating around a rotation center axis in a direction lateral to a reciprocating direction of the second drive rod;
- a cam member whose end surface a cam surface contacted by the first drive roller and the second drive roller is provided on and that is rotated around a rotation center axis parallel to the reciprocating directions of the first drive rod and the second 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,
- wherein the housing is provided with an observation window through which the outer peripheral portion of the cam member provided with the magnet can be viewed from outside the housing.
6 more elements
A liquid supply device comprising:
- a pump unit provided with a first pump member for expanding and contracting a first pump chamber and a second pump member for expanding and contracting a second pump chamber;
- a housing incorporating a first drive rod and a second drive rod for driving the first pump member and the second pump member at different timing;
- a first drive roller provided on the first drive rod and rotating around a rotation center axis in a direction lateral to a reciprocating direction of the first drive rod;
- a second drive roller provided on the second drive rod and rotating around a rotation center axis in a direction lateral to a reciprocating direction of the second drive rod;
- a cam member whose end surface a cam surface contacted by the first drive roller and the second drive roller is provided on and that is rotated around a rotation center axis parallel to the reciprocating directions of the first drive rod and the second 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,
- wherein the cam member is made of a magnetic material and has a magnet holder covering the magnet and made of a non-magnetic material, and a magnetic field formed by the magnet passes through magnet holder to be applied to the magnetic sensor.
6 more elements
A liquid supply device comprising:
- a pump unit provided with a first pump member for expanding and contracting a first pump chamber and a second pump member for expanding and contracting a second pump chamber;
- a housing incorporating a first drive rod and a second drive rod for driving the first pump member and the second pump member at different timing;
- a first drive roller provided on the first drive rods and rotating around a rotation center axis in a direction lateral to a reciprocating direction of the first drive rod;
- a second drive roller provided on the second drive rod and rotating around a rotation center axis in a direction lateral to a reciprocating direction of the second drive rod;
- a cam member whose end surface a cam surface contacted by the first drive roller and the second drive roller is provided on and that is rotated around a rotation center axis parallel to the reciprocating directions of the first drive rod and the second 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,
- wherein rotation center axes of the first drive roller and the second drive roller are coxial,
- the cam surface has a projection surface protruding toward the housing, a retracting surface that is shifted by 180 degrees in a rotation direction from the projection surface and is located at a position retracted from the projection surface, and an inclined surface between the projection surface and the retracting surface, and
- the magnet is arranged on a thick portion of the cam member provided with the projection surface.
8 more elements
Dependencies are inferred from the claim text.