Electromagnetic relay
US-2022293373-A1 · Sep 15, 2022 · US
Electromagnetic switch with increased magnetic flux density
US9484173B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9484173-B2 |
| Application number | US-201514677047-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 2, 2015 |
| Priority date | Nov 13, 2012 |
| Publication date | Nov 1, 2016 |
| Grant date | Nov 1, 2016 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An electromagnetic switch includes a pair of fixed contacts fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case to contact to and separate from the pair of fixed contacts; and an electromagnet unit causing the movable contact to contact to and separate from the pair of fixed contacts. The electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger disposed to move through a through hole provided in the magnetic yoke and having a contact pole surface facing the contact pole surface of the magnetic yoke, and a linking shaft linking the movable plunger and the movable contact. The contact pole surface of the movable plunger includes a circular protruding portion having a width narrower than that of a surface facing the magnetic yoke for increasing a magnetic flux density.
First claim
Opening claim text (preview).
What is claimed is: 1. An electromagnetic switch, comprising: a pair of fixed contacts fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case to contact to and separate from the pair of fixed contacts; and an electromagnet unit causing the movable contact to contact to and separate from the pair of fixed contacts, wherein the electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger disposed to move through a through hole provided in the magnetic yoke and having a peripheral flange portion which extends radially outwardly and a contact pole surface formed at the peripheral flange portion and facing a contact pole surface of the magnetic yoke, and a linking shaft linking the movable plunger and the movable contact, and the contact pole surface of the movable plunger includes a circular protruding portion having a width narrower than that of a surface facing the magnetic yoke for increasing a magnetic flux density. 2. The electromagnetic switch according to claim 1 , wherein the circular protruding portion is formed in an annular shape. 3. An electromagnetic switch, comprising: a pair of fixed contacts fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case to contact to and separate from the pair of fixed contacts; and an electromagnet unit causing the movable contact to contact to and separate from the pair of fixed contacts, wherein the electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger disposed to move through a through hole provided in the magnetic yoke and having a contact pole surface facing a contact pole surface of the magnetic yoke, and a linking shaft linking the movable plunger and the movable contact, the contact pole surface of the movable plunger includes a circular protruding portion having a width narrower than that of a surface facing the magnetic yoke for increasing a magnetic flux density, and the circular protruding portion is formed on an outer peripheral side of a peripheral flange portion formed on the movable plunger.
Assignees
Inventors
Classifications
movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil · CPC title
fixed to operating part · CPC title
- H01H50/648Primary
intermediate part being rigidly combined with armature (H01H50/66 - H01H50/74 take precedence) · CPC title
Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles (details H01H50/20) · CPC title
containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction · CPC title
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- What does patent US9484173B2 cover?
- An electromagnetic switch includes a pair of fixed contacts fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case to contact to and separate from the pair of fixed contacts; and an electromagnet unit causing the movable contact to contact to and separate from the pair of fixed contacts. The electromagnet unit has a mag…
- Who is the assignee on this patent?
- Fuji Electric Fa Components & Systems Co Ltd, Fuji Electric Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01H50/648. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 01 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).