US 9,543,102 B2Granted

Electromagnetic switch and contact position regulating method thereof

AssigneesFuji Electric Fa Components & Systems Co., Ltd., Fuji Electric Co., Ltd.

InventorsHiroyuki Tachikawa, Masaru Isozaki, Osamu Kashimura, Kouetsu Takaya

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Abstract

An electromagnetic switch includes a main contact housing portion housing a main contact mechanism having a pair of fixed contacts fixedly disposed maintaining a predetermined interval and a movable contact disposed to connect with and separate from the pair of fixed contacts in a contact housing case; an auxiliary contact housing portion housing at least two auxiliary contact mechanisms having fixed contacts and movable contacts disposed connecting to and separating from the fixed contacts; and an electromagnet unit having a movable plunger individually coupled to move the movable contact of the main contact mechanism and the movable contacts of the auxiliary contact mechanisms. The main contact housing portion, the auxiliary contact housing portion, and the electromagnet unit are disposed in series.

Claims17

Dependent claims

An electromagnetic switch, comprising:

a main contact housing portion including in a contact housing case a main contact mechanism having a pair of main fixed contacts fixedly disposed to maintain a predetermined interval and a main movable contact disposed to contact with and separate from the pair of main fixed contacts;
an auxiliary contact housing portion including
at least two auxiliary contact mechanisms having auxiliary fixed contacts and auxiliary movable contacts disposed to contact with and separating from the auxiliary fixed contacts,
auxiliary fixed contact holding portions to hold the auxiliary fixed contacts, and
an auxiliary movable contact holding portion to hold the auxiliary movable contacts via auxiliary contact springs;
an electromagnet unit having a movable plunger individually coupled to and moving the main movable contact of the main contact mechanism and the auxiliary movable contacts of the auxiliary contact mechanisms;
and
a position regulating mechanism to regulate a position of the auxiliary movable contact holding portion in respect to the movable plunger in a moving direction of the auxiliary movable contacts,
wherein the main contact housing portion, the auxiliary contact housing portion, and the electromagnet unit are disposed in series.

6 more elements

An electromagnetic switch contact position regulating method, comprising:

a step of preparing a main contact housing portion housing a main contact mechanism having a pair of main fixed contacts fixedly disposed to maintain a predetermined interval and a main movable contact disposed to contact with and separate from the pair of main fixed contacts in a contact housing case, an auxiliary contact housing portion housing at least two auxiliary contact mechanisms having auxiliary fixed contacts and auxiliary movable contacts disposed to contact with and separate from the auxiliary fixed contacts, and an electromagnet unit having a movable plunger coupled via a coupling shaft to the main movable contact of the main contact mechanism and the auxiliary movable contacts of the auxiliary contact mechanisms;
a step of arranging the main contact housing portion, the auxiliary contact housing portion, and the electromagnet unit in series;
a step of interposing a gap regulating plate between the movable plunger and auxiliary contact housing portion, the gap regulating plate corresponding to a gap between the main and auxiliary fixed contacts and main and auxiliary movable contacts of the main contact mechanism and auxiliary contact mechanisms at a released time, in a condition of screwing an auxiliary movable contact holding portion holding the auxiliary movable contacts of the auxiliary contact mechanisms to the movable plunger and screwing the coupling shaft to the movable plunger;
a step of turning the movable plunger so that the auxiliary movable contacts contact the auxiliary fixed contacts of the auxiliary contact mechanisms;
a step of removing the gap regulating plate and interposing a wipe amount regulating plate corresponding to an amount of contact wipe between the main and auxiliary fixed contacts and main and auxiliary movable contacts of the main contact mechanism and auxiliary contact mechanisms;
a step of turning the coupling shaft so that the main movable contact contacts the main fixed contacts of the main contact mechanism;
and
a step of removing the wipe amount regulating plate.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/508,577Filed 7 Oct 2014 · continuation
Priority: JP 2012-10397127 Apr 2012
Published: US 2015/0022292 A122 Jan 2015
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H01H 50/641
Driving arrangements between movable part of magnetic circuit and contact: intermediate part performing a rectilinear movement
H01H 1/34
By abutting: with provision for adjusting position of contact relative to its co-operating contact
H01H 49/00
Apparatus or processes specially adapted to the manufacture of relays or parts
H01H 50/54
Details of electromagnetic relays: contact arrangements