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US 2016/0355022 A1Published application
Pressure adjusting device for inkjet device
AssigneeToshiba Tec Kabushiki Kaisha
InventorYasushi KURIBAYASHI
Life of this patent
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Abstract
A pressure adjusting device includes a housing with a cylinder. A piston moves within the cylinder in an axial direction. A pulse motor is fixed to the housing. A switch provided on a surface of the cylinder is actuated by movement of the piston in the cylinder in the axial direction. The switch includes a fixed contact point and a moveable contact point. The piston presses the movable contact point to abut against the fixed contact point when the piston moves from a position other than the initial position to the initial position so that the movable contact point electrically contacts the fixed contact point.
Claims20
A pressure adjusting device comprising:
- a housing that includes a cylinder;
- a piston that moves within the cylinder in an axial direction;
- a pulse motor fixed to the housing and including a rotation shaft that is connected to the piston so that a rotational movement of the rotation shaft translates into a translational movement in the axial direction of the piston;
- and
- an origin point switch provided on a surface of the cylinder, the origin point switch being actuated by movement of the piston in the cylinder in the axial direction, wherein the origin point switch includes:
- a first contact member that is formed of a conductor and includes a contact point at a fixed position,
- a positioning member that is interposed between the pulse motor and the cylinder, and has an open portion that exposes the contact point of the first contact member, and
- a second contact member that is formed of an elastically deformable conductor and includes a fixed end fixed to the positioning member on one end side and a movable contact point elastically held, when the piston is in an initial position, in a position separated from and facing the contact point of the first contact member,
- wherein the piston presses the movable contact point in a direction to abut against the contact point of the first contact member when the piston moves from a position other than the initial position to the initial position so that the movable contact point electrically contacts the contact point of the first contact member.
6 more elements
An inkjet printing device comprising:
- an ink head having at least one nozzle for ejecting ink;
- an ink circulating unit for circulating ink to and from the ink head;
- and
- a pressure adjusting unit for adjusting a pressure in the ink circulating unit, the pressure adjusting unit including:
- a housing that includes a cylinder,
- a piston that moves within the cylinder in an axial direction,
- a pulse motor fixed to the housing and including a rotation shaft that is connected to the piston so that a rotational movement of the rotation shaft translates into a translational movement in the axial direction of the piston, and
- an origin point switch provided on a surface of the cylinder, the origin point switch being actuated by movement of the piston in the cylinder in the axial direction, wherein the origin point switch includes:
- a first contact member that is formed of a conductor and includes a contact point at a fixed position,
- a positioning member that is interposed between the pulse motor and the cylinder, and has an open portion that exposes the contact point of the first contact member, and
- a second contact member that is formed of an elastically deformable conductor and includes a fixed end fixed to the positioning member on one end side and a movable contact point elastically held, when the piston is in an initial position, in a position separated from and facing the contact point of the first contact member,
- wherein the piston presses the movable contact point in a direction to abut against the contact point of the first contact member when the piston moves from a position other than the initial position to the initial position so that the movable contact point electrically contacts the contact point of the first contact member.
9 more elements
An ink circulating device for circulating and providing ink to an ink nozzle comprising:
- an ink circulating unit for circulating ink to and from the ink head;
- a plurality of pressure chambers in fluid communication with the ink circulating unit;
- and
- a pressure adjusting unit for selectively adjusting a pressure in the pressure chambers, the pressure adjusting unit including:
- a housing that includes a cylinder,
- a piston that moves within the cylinder in an axial direction,
- a pulse motor fixed to the housing and including a rotation shaft that is connected to the piston so that a rotational movement of the rotation shaft translates into a translational movement in the axial direction of the piston, and
- an origin point switch provided on a surface of the cylinder, the origin point switch being actuated by movement of the piston in the cylinder in the axial direction, wherein the origin point switch includes:
- a first contact member that is formed of a conductor and includes a contact point at a fixed position,
- a positioning member that is interposed between the pulse motor and the cylinder, and has an open portion that exposes the contact point of the first contact member, and
- a second contact member that is formed of an elastically deformable conductor and includes a fixed end fixed to the positioning member on one end side and a movable contact point elastically held, when the piston is in an initial position, in a position separated from and facing the contact point of the first contact member,
- wherein the piston presses the movable contact point in a direction to abut against the contact point of the first contact member when the piston moves from a position other than the initial position to the initial position so that the movable contact point electrically contacts the contact point of the first contact member.
9 more elements
Dependencies are inferred from the claim text.