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US 6,486,760 B2Granted
Electromagnetic relay
AssigneeMatsushita Electric Works, Ltd.
InventorsKatsuji Miyazaki, Tsutomu Shimomura, Toyotaka Nishikawa, Masaru Tsuji, Masakatsu Makino
Life of this patent
Estimating the term…
Abstract
An electromagnet includes a plate-like yoke, shaped like L, with a curved surface portion, a rectangular iron core connected to said yoke and wound by a coil, an armature rotatably and pivotally supported by one end of said yoke, said armature being driven by said coil and coupling device for coupling said yoke with said iron core by spin press-fitting.
Claims24
An electromagnet comprising:
- a yoke comprising a base portion and a leg portion, said leg portion extending substantially perpendicularly from a first end of said base portion and defining an insertion portion;
- a rectangular iron core extending through an electromagnetic coil, said iron core comprising a protrusion extending into said insertion portion for providing a connection between said iron core and said yoke, the connection comprising a gapless mechanical contact between an outer periphery of said protrusion and an inner periphery of said insertion portion;
- and
- an armature pivotally supported by a second end of said base portion opposite to said leg portion of said yoke, said armature being magnetically driven by said coil.
1 more element
An electromagnet comprising:
- an electromagnetic block, comprising:
- a yoke comprising a base portion, a leg portion and a contact area, said leg portion extending substantially perpendicularly from one end of said base portion, and said contact area being larger than a cross-section of said base portion by extending substantially perpendicularly from an opposite end of said base portion and in an opposite direction from said leg portion;
- a rectangular iron core, said iron core having a coil wound thereon and being connected to said yoke, a connection between said iron core and said yoke comprising a spin-pressed joint;
- an armature pivotally supported by and in contact with said enlarged contact area of said yoke, said armature being magnetically driven by said coil and movable through a range of motion;
- wherein said leg portion of said yoke is magnetically coupled with a first magnetic pole of said electromagnet and said base portion extends toward a second magnetic pole of said electromagnet;
- and
- a contact assembly comprising a fixed contact and a movable contact, wherein said movable contact is movable between a closed position in contact with said fixed contact and an open position spaced a distance away from said fixed contact, the distance being defined by the range of motion of said armature.
4 more elements
An electromagnet comprising:
- a yoke, comprising a base portion, a leg portion and a contact area, said leg portion extending substantially perpendicularly from one end of said base portion, and said contact area extending substantially perpendicularly from an opposite end of said base portion and in an opposite direction from said leg portion, thereby being larger than a cross-section of said base portion;
- and
- a rectangular iron core, said iron core having a coil wound thereon and being connected to said yoke, wherein the connection between said iron core and said yoke comprises a spin-pressed joint;
- an armature pivotally supported by and in contact with said enlarged contact area of said yoke, said armature being magnetically driven by said coil and movable through a range of motion;
- a movable contact being movable through a distance defined by the range of motion of said armature;
- and
- a fixed contact, wherein said movable contact is movable between a closed position in contact with said fixed contact and an open position not in contact with said fixed contact;
- wherein said leg portion of said yoke is magnetically coupled with a first magnetic pole of said iron core and said base portion extends toward a second magnetic pole of said iron core.
5 more elements
An electromagnet comprising:
- a yoke comprising a base portion and a leg portion, said leg portion extending substantially perpendicularly from one end of said base portion, and said base portion comprising an enlarged contact area disposed on an end of said base portion which is opposite to said leg portion;
- a rectangular iron core, said iron core having a coil wound thereon and having a spin-pressed connection with said yoke;
- an armature pivotally supported by and in contact with said enlarged contact area of said yoke, said armature being magnetically driven by said coil and movable through a range of motion;
- a movable contact being movable through a distance defined by the range of motion of said armature;
- and
- a fixed contact, wherein said movable contact is movable between a closed position in contact with said fixed contact and an open position not in contact with said fixed contact;
- wherein said leg portion of said yoke is magnetically coupled with a first magnetic pole of said iron core and said base portion extends toward a second magnetic pole of said iron core;
- and
- wherein said enlarged contact area being in one piece with said base portion, said base portion being extended at an angle of about ninety degrees to form said enlarged contact area and said enlarged contact area being configured to define a perpendicular corner at a juncture of said enlarged contact area and said base portion.
6 more elements
An electromagnet comprising:
- a yoke a base portion and a leg portion, said leg portion extending substantially perpendicularly from a first end of said base portion and defining an insertion hole, and said base portion comprising a contact area, said contact area extending substantially perpendicularly from a second end of said base portion in a direction opposite to the extension of said leg portion;
- a rectangular iron core, said iron core comprising a protrusion at one end and extending through an electromagnetic coil, said protrusion extending through said insertion hole, and an outer periphery of said protrusion connecting with an inner periphery of said insertion hole;
- an armature pivotally supported at said contact area, said armature being magnetically driven by said coil and movable between an energized position touching said contact area and a neutral position not touching said contact area;
- a contact assembly comprising a fixed contact and a movable contact, wherein said movable contact is movable between a closed position in contact with said fixed contact and an open position not in contact with said fixed contact;
- and
- a card connected at one end to said armature and at an opposite end to said movable contact, wherein said card drives said movable contact so that the closed position and the open position of said movable contact correspond to the energized position and the neutral position of said armature, respectively;
- wherein the connection between the outer periphery of said protrusion and the inner periphery of said insertion hole comprises a gapless mechanical contact, thereby increasing electrical conductivity;
- and
- wherein said contact area of said base portion extends for a distance that is longer than a width of said base portion, thereby increasing electrical conductivity.
6 more elements
An electromagnet comprising:
- a yoke comprising a base portion and a leg portion, said leg portion extending substantially perpendicularly from a first end of said base portion and defining an insertion portion;
- a rectangular iron core extending through an electromagnetic coil, said iron core comprising a protrusion extending into and providing a connection with said insertion portion, the connection comprising a spin-pressed joint;
- and
- an armature pivotally supported by a second end of said base portion opposite to said leg portion of said yoke, said armature being magnetically driven by said coil.
1 more element
Dependencies are inferred from the claim text.