Electromagnetic device and electromagnetic relay equipped with electromagnetic device
First Claim
1. An electromagnetic device comprising:
- a coil configured to generate a first magnetic flux when a current is applied thereto;
a fixed member through which the first magnetic flux flows;
a movable member configured to reciprocate to separate from the fixed member by a predetermined gap when the current applied to the coil is stopped and move to the fixed member by an attractive force when the current is applied to the coil; and
a permanent magnet configured to generate a second magnetic flux between opposed surfaces of the fixed member and the movable member in a direction conforming to the first magnetic flux, the opposed surface of the fixed member and the opposed surface of the movable member are opposed in a reciprocating direction of the movable member,wherein the permanent magnet is attached to at least one of the fixed member and the movable member such that a magnetized surface of the permanent magnet is opposed and exposed to the opposed surface of the other one of the fixed member and the movable member.
1 Assignment
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Accused Products
Abstract
An electromagnetic device includes: a coil configured to generate a first magnetic flux; a fixed member, a movable member configured to reciprocate to separate from the fixed member by a predetermined gap when a current applied to the coil is stopped and move to the fixed member by an attractive force when the current is applied to the coil; and a permanent magnet configured to generate a second magnetic flux between the respective opposed surfaces of the fixed member and the movable member in the same direction as the first magnetic flux. The permanent magnet is attached to at least one of the fixed member and the movable member such that a magnetized surface of the permanent magnet is opposed and exposed to the opposed surface of the other one of the fixed member and the movable member.
15 Citations
7 Claims
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1. An electromagnetic device comprising:
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a coil configured to generate a first magnetic flux when a current is applied thereto; a fixed member through which the first magnetic flux flows; a movable member configured to reciprocate to separate from the fixed member by a predetermined gap when the current applied to the coil is stopped and move to the fixed member by an attractive force when the current is applied to the coil; and a permanent magnet configured to generate a second magnetic flux between opposed surfaces of the fixed member and the movable member in a direction conforming to the first magnetic flux, the opposed surface of the fixed member and the opposed surface of the movable member are opposed in a reciprocating direction of the movable member, wherein the permanent magnet is attached to at least one of the fixed member and the movable member such that a magnetized surface of the permanent magnet is opposed and exposed to the opposed surface of the other one of the fixed member and the movable member. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification
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- Resources
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Current AssigneePanasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
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Original AssigneePanasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
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InventorsSakai, Satoshi, Uruma, Katsuya
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Primary Examiner(s)Ismail, Shawki S
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Assistant Examiner(s)Homza, Lisa N
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Application NumberUS15/619,885Publication NumberTime in Patent Office855 DaysField of Search335179US Class CurrentCPC Class CodesH01H 50/163 Details concerning air-gaps...H01H 50/20 movable inside coil and sub...H01H 50/36 Stationary parts of magneti...H01H 50/44 Magnetic coils or windingsH01H 51/065 Relays having a pair of nor...H01H 51/2209 with rectilinearly movable ...H01H 51/27 Relays with armature having...
