Electromagnetic relay
First Claim
1. An electromagnetic relay comprising:
- an electromagnet composed of a core and a coil wound around said core;
at least a contact mechanism disposed at a side of said electromagnet;
a movable armature composed of at least a permanent magnet juxtaposed in parallel with said electromagnet so that both magnetic poles of said permanent magnet are positioned in opposition to both ends of said core, respectively;
a holder frame having erect legs positioned adjacent to both ends of said core, respectively, with said permanent magnet being interposed between said legs and said core;
an actuating member operatively coupled to said permanent magnet for actuating said contact mechanism;
a restoring spring for said movable armature disposed between said permanent magnet and said core;
wherein said core is of an I-like configuration and pairs of relay swithces are disposed at both sides of said electromagnet, respectively, with a first pair of said relay switches being positioned adjacent to one end of said core while a second pair of the relay switches is positioned adjacent to the other end of said core, said movable armature being of a rectangular frame structure constituted by a pair of the permanent magnets extending in parallel with said core, disposed at both sides thereof, respectively, and interconnected by non-magnetic connecting beams, wherein said pair of permanent magnets are so disposed that magnetic poles of opposite polarities face toward one another; and
wherein said holder frame is of an H-like form having four upstanding legs of which two are disposed at one side of said electromagnet with one of said permanent magnets being interposed therebetween while the other two legs are disposed at the other side of the electromagnet with the other permanent magnet being disposed therebetween.
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Accused Products
Abstract
An electromagnetic relay comprising an electromagnet constituted by an I-like core and a coil wound around the core, a pair of contact mechanisms disposed at both sides of the electromagnet, respectively, a pair of permanent magnets disposed in parallel with the core in such magnetic orientation that the magnetic poles of the permanent magnets each positioned adjacent to each lateral end faces of the I-like core exhibit different polarities, the permanent magnets being interconnected by connecting beam members at both ends to thereby constitutes a frame-like movable armature, a H-like holder having four upstanding legs positioned in opposition to the lateral end faces of the I-like core, respectively, with the permanent magnet being interposed between the legs and the core, actuating members operatively coupled to the permanent magnetic for actuating the contact mechanisms in response to the movement of the armature frame, and a restorting spring for the movable armature frame.
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Citations
11 Claims
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1. An electromagnetic relay comprising:
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an electromagnet composed of a core and a coil wound around said core; at least a contact mechanism disposed at a side of said electromagnet; a movable armature composed of at least a permanent magnet juxtaposed in parallel with said electromagnet so that both magnetic poles of said permanent magnet are positioned in opposition to both ends of said core, respectively; a holder frame having erect legs positioned adjacent to both ends of said core, respectively, with said permanent magnet being interposed between said legs and said core; an actuating member operatively coupled to said permanent magnet for actuating said contact mechanism; a restoring spring for said movable armature disposed between said permanent magnet and said core; wherein said core is of an I-like configuration and pairs of relay swithces are disposed at both sides of said electromagnet, respectively, with a first pair of said relay switches being positioned adjacent to one end of said core while a second pair of the relay switches is positioned adjacent to the other end of said core, said movable armature being of a rectangular frame structure constituted by a pair of the permanent magnets extending in parallel with said core, disposed at both sides thereof, respectively, and interconnected by non-magnetic connecting beams, wherein said pair of permanent magnets are so disposed that magnetic poles of opposite polarities face toward one another; and wherein said holder frame is of an H-like form having four upstanding legs of which two are disposed at one side of said electromagnet with one of said permanent magnets being interposed therebetween while the other two legs are disposed at the other side of the electromagnet with the other permanent magnet being disposed therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electromagnetic relay, comprising:
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a common contact member; a normally closed contact member; a normally opened contact member provided in opposition to said normally closed contact member with said common contact member being interposed therebetween; a normally closed movable contact piece mounted on a card at an intermediate portion and serving for opening or closing a current path between said common contact member and said normally closed member; a normally opened movable contact piece mounted on a card at an intermediate portion and serving for closing or opening a current path between said common contact member and said normally opened contact member; a restoring spring for resiliently urging said cards in parallel with each other to thereby hold said normally closed movable contact piece in the current path establishing state while holding said normally opened movable contact piece in the current path interrupting state; an electromagnet for pressing said restoring spring at an intermediate portion to thereby change over said normally closed contact piece to said current path interrupting state, while changing over said normally opened movable contact piece to said current path establishing state; and a pair of earth protrusions against which at least said normally closed movable contact piece bears in said current path interrupting state;
wherein;distance between said paired earth protrusions against which said normally closed movable contact piece bears is selected smaller than a distance between said common contact member and said normally opened contact member.
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Specification