Magnetic erasing device
AssigneeZero Lab Co., Ltd.
InventorRitsuo Koga
Life of this patent
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Abstract
A magnetic erasing device includes a rotating member provided in an internal space of a cylindrical housing, a first magnet and a second magnet attached to the rotating member, and a motor for driving the rotating member. The first magnet is arranged so that the S pole is exposed and the second magnet is attached so that the N pole is exposed. By rotating the rotating member, the magnetic field generated by the first and second magnets is changed.
Claims20
A magnetic erasing device for a magnetophoretic type magnetic panel, the magnetophoretic type magnetic panel including a plurality of microcapsules two-dimensionally arranged, each microcapsule including magnetic particles which are moved by applying lines of magnetic force, the magnetic erasing device comprising:
- a housing having sides for defining an open end and an internal space surrounded by the sides, the housing being made of a nonmagnetic material;
- a magnetic field generator accommodated in the housing and configured to generate a magnetic field to erase a visible marking magnetically drawn on the magnetophoretic type magnetic panel;
- a magnetic field changer configured to change the magnetic field generated by the magnetic field generator;
- and
- a magnetic member provided on an inner periphery of the sides of the housing to prevent leaks of lines of magnetic force from the sides.
A magnetic erasing device for a magnetophoretic type magnetic panel, the magnetophoretic type magnetic panel including a plurality of microcapsules two-dimensionally arranged, each microcapsule including magnetic particles which are moved by applying lines of magnetic force, the magnetic erasing device comprising:
- a housing having sides for defining an open end and an internal space surrounded by the sides;
- a magnetic field generator accommodated in the housing and configured to generate a magnetic field to erase a visible marking magnetically drawn on the magnetophoretic type magnetic panel;
- a magnetic field changer configured to change the magnetic field generated by the magnetic field generator;
- and
- a cover member attached so as to contact with an open end of the housing to shield the internal space, wherein the housing and the cover member are made of a nonmagnetic material.
A magnetic erasing device for a magnetophoretic type magnetic panel, the magnetophoretic type magnetic panel including a plurality of microcapsules two-dimensionally arranged, each microcapsule including magnetic particles which are moved by applying lines of magnetic force, the magnetic erasing device comprising:
- a housing, an internal space being formed in the housing;
- a magnetic field generator accommodated in the housing and configured to generate a magnetic field to erase a visible marking magnetically drawn on the magnetophoretic type magnetic panel;
- magnetic field changer configured to change the magnetic field generated by the magnetic field generator;
- and
- a sensor configured to detect whether any object contacts with an external surface of the housing, wherein the magnetic field changer is configured to activate the magnetic field changer when contact is detected by the sensor and to stop the magnetic field changer when contact is no longer detected by the sensor.
A magnetic erasing device for a magnetophoretic type magnetic panel, the magnetophoretic type magnetic panel including a plurality of microcapsules two-dimensionally arranged, each microcapsule including magnetic particles which are moved by applying lines of magnetic force, the magnetic erasing device comprising:
- a housing, an internal space and an open end connected to the internal space being formed in the housing;
- a magnetic field generator having a magnet accommodated in the housing and configured to generate a magnetic field to erase a visible marking magnetically drawn on the magnetophoretic type magnetic panel;
- magnetic field changer configured to change the magnetic field generated by the magnetic field generator;
- and
- a variable mechanism configured to vary a distance to the magnet of the magnetic field generator from the open end of the housing, wherein the magnitude of the magnetic field applied with the magnetophoretic type magnetic panel through the open end is varied by the variable mechanism.
Dependencies are inferred from the claim text.