US 2012/0075044 A1Published application

Electromagnetic relay

AssigneeAnden Co., Ltd.

InventorMasanao SUGISAWA

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Abstract

An electromagnetic relay includes a coil, a movable member, first and second fixed contact supports each having first and second fixed contacts, and a movable body having first and second movable contacts. A third fixed contact is arranged on the second fixed contact support at a position away from a line passing through the first and second fixed contacts, and a third movable contact is arranged on the movable body. When the movable member is driven by electromagnetic force of the coil, the movable contacts contact the fixed contacts at a contact portion between the first fixed contact and the first movable contact, a contact portion between the second fixed contact and the second movable contact, and a contact portion between the third fixed contact and the third movable contact.

Claims7

Dependent claims

An electromagnetic relay comprising:

a coil configured to generate an electromagnetic force when the coil is energized;
a movable member configured to be driven by the electromagnetic force of the coil;
two fixed contact supports having two fixed contacts, respectively;
a movable body having two movable contacts configured to contact and be separated from the fixed contacts, respectively;
a pressure spring configured to urge the movable body such that the movable contacts contact the fixed contacts, respectively;
a return spring configured to urge the movable body via the movable member such that the movable contacts are separated from the fixed contacts, respectively, wherein the movable contacts contact the fixed contacts and the movable member is separated from the movable body when the movable member is driven by the electromagnetic force of the coil;
a fixed-side contact member fixed to a predetermined position;
and
a movable-side contact member arranged on the movable body, the movable-side contact member being configured to contact the fixed-side contact member when the movable contacts contact the fixed contacts, wherein
the fixed-side contact member is arranged away from a line passing through the two fixed contacts, and
the movable-side contact member is arranged away from a line passing through the two movable contacts.

8 more elements

An electromagnetic relay comprising:

a coil configured to generate an electromagnetic force when the coil is energized;
a movable member configured to be driven by the electromagnetic force of the coil;
a first fixed contact support having a first fixed contact;
a second fixed contact support having a second fixed contact;
a movable body having a first movable contact configured to contact and be separated from the first fixed contact and a second movable contact configured to contact and be separated from the second fixed contact;
a pressure spring configured to urge the movable body such that the first movable contact contacts the first fixed contact and the second movable contact contacts the second fixed contact;
a return spring configured to urge the movable body via the movable member such that the first movable contact is separated from the first fixed contact and the second movable contact is separated from the second fixed contact;
a first magnet arranged lateral to the first fixed contact and the first movable contact, the first magnet being configured to act Lorentz force on an arc generated between the first fixed contact and the first movable contact;
a second magnet arranged lateral to the second fixed contact and the second movable contact, the second magnet being configured to act Lorentz force on an arc generated between the second fixed contact and the second movable contact, wherein the first and second movable contacts contact the first and second fixed contacts and the movable member is separated from the movable body when the movable member is driven by the electromagnetic force of the coil;
a third fixed contact fixed to the second fixed contact support;
and
a third movable contact arranged on the movable body, the third movable contact being configured to contact the third fixed contact when the movable member is driven by the electromagnetic force of the coil, wherein
the third fixed contact is arranged away from a line passing through the first fixed contact and the second fixed contact,
the third movable contact is arranged away from a line passing through the first movable contact and the second movable contact,
a distance from the second magnet to the third fixed contact and the third movable contact is longer than a distance from the second magnet to the second fixed contact and the second movable contact,
a portion of the movable member, which contacts the movable body, is a movable-member end surface, and a portion of the movable body, which contacts the movable-member end surface, is a movable-body pressing surface, and
the movable-member end surface is inclined with respect to the movable-body pressing surface when the first to third movable contacts contact the first to third fixed contacts such that the second movable contact is separated from the second fixed contact after the third movable contact is separated from the third fixed contact when the coil is de-energized and the movable member is driven by an urging force of the return spring.

14 more elements

An electromagnetic relay comprising:

a coil configured to generate an electromagnetic force when the coil is energized;
a movable member configured to be driven by the electromagnetic force of the coil;
a first fixed contact support having a first fixed contact;
a second fixed contact support having a second fixed contact;
a movable body having a first movable contact configured to contact and be separated from the first fixed contact and a second movable contact configured to contact and be separated from the second fixed contact;
a pressure spring configured to urge the movable body such that the first movable contact contacts the first fixed contact and the second movable contact contacts the second fixed contact;
a return spring configured to urge the movable body via the movable member such that the first movable contact is separated from the first fixed contact and the second movable contact is separated from the second fixed contact;
a first magnet arranged lateral to the first fixed contact and the first movable contact, the first magnet being configured to act Lorentz force on an arc generated between the first fixed contact and the first movable contact;
a second magnet arranged lateral to the second fixed contact and the second movable contact, the second, magnet being configured to act Lorentz force on an arc generated between the second fixed contact and the second movable contact, wherein the first and second movable contacts contact the first and second fixed contacts and the movable member is separated from the movable body when the movable member is driven by the electromagnetic force of the coil;
a third fixed contact fixed to the second fixed contact support;
and
a third movable contact arranged on the movable body, the third movable contact being configured to contact the third fixed contact when the movable member is driven by the electromagnetic force of the coil, wherein
the third fixed contact is arranged away from a line passing through the first fixed contact and the second fixed contact,
the third movable contact is arranged away from a line passing through the first movable contact and the second movable contact,
a distance from the second magnet to the third fixed contact and the third movable contact is longer than a distance from the second magnet to the second fixed contact and the second movable contact,
a portion of the movable member, which contacts the movable body, is a movable-member end surface, and a portion of the movable body, which contacts the movable-member end surface, is a movable-body pressing surface, and
the movable-body pressing surface has a protrusion that protrudes toward the movable-member end surface such that the second movable contact is separated from the second fixed contact after the third movable contact is separated from the third fixed contact when the coil is de-energized and the movable member is driven by an urging force of the return spring.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/307,116Filed 30 Nov 2011
Priority: JP 2009-3627519 Feb 2009
Published: 29 Mar 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H01H 50/54
Details of electromagnetic relays: contact arrangements
H01H 50/305
Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature: damping vibration due to functional movement…
H01H
Electric switches

Family

Application12/656,650Division · filed 12 Feb 2010
Application13/307,116Division
US 2010/0207713 A1Published application
US 8,274,345 B2Related patent
US 8,339,222 B2Related patent
US 2012/0075044 A1This patent

From the US filing history. Foreign family members aren’t listed.

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