US 2012/0235774 A1Published application

Reed switch

AssigneeKabushiki Kaisha Yaskawa Denki

InventorsShunji Nakahashi, Kenjiro Hamada, Yoichi Wakabayashi

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Abstract

A reed switch includes an envelope. First and second fixed terminal pieces are at one end of the envelope. A third fixed terminal piece is at another end of the envelope. A movable reed piece has a base end portion facing the one end portion of the third fixed terminal piece across a magnetic gap, a distal end portion to contact the first fixed terminal piece, and a movable contact portion. A first spring member has a base end portion secured to the first fixed terminal piece and a distal end portion to contact the movable contact portion. A second spring member has a base end portion secured to the second fixed terminal piece and a distal end portion to contact the movable contact portion. A third spring member has one and another end portions respectively secured to the movable reed piece and the third fixed terminal piece.

Claims20

Dependent claims

A reed switch comprising:

an envelope having one end and another end;
a first fixed terminal piece at the one end of the envelope, the first fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a second fixed terminal piece spaced apart from the first fixed terminal piece at the one end of the envelope, the second fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a third fixed terminal piece at the other end of the envelope, the third fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a movable reed piece inside the envelope, the movable reed piece having a base end portion, a distal end portion, and a movable contact portion, the base end portion facing the one end portion of the third fixed terminal piece across a magnetic gap, the distal end portion being configured to come into contact with the first fixed terminal piece, the movable contact portion being further centerward than the distal end portion in a longitudinal direction of the reed switch;
a first spring member having a base end portion secured to the first fixed terminal piece and a distal end portion configured to come into contact with the movable contact portion;
a second spring member having a base end portion secured to the second fixed terminal piece and a distal end portion configured to come into contact with the movable contact portion;
and
a third spring member having one end portion secured to the movable reed piece and another end portion secured to the third fixed terminal piece.

6 more elements

A reed switch comprising:

an envelope having one end and another end;
a first fixed terminal piece at the one end of the envelope, the first fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a second fixed terminal piece spaced apart from the first fixed terminal piece at the one end of the envelope, the second fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a third fixed terminal piece at the other end of the envelope, the third fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a movable reed piece inside the envelope, the movable reed piece having a base end portion, a distal end portion, and a movable contact portion, the base end portion facing the one end portion of the third fixed terminal piece across a magnetic gap, the distal end portion being configured to come into contact with at least one of the first fixed terminal piece and the second fixed terminal piece, the movable contact portion being further centerward than the distal end portion in a longitudinal direction of the reed switch;
a first spring member having a base end portion secured to the first fixed terminal piece and a distal end portion configured to come into contact with the movable contact portion;
a second spring member having a base end portion secured to the second fixed terminal piece and a distal end portion configured to come into contact with the movable contact portion;
and
a third spring member having one end portion secured to the movable reed piece and another end portion secured to the third fixed terminal piece.

6 more elements

A reed switch comprising:

an envelope having one end and another end;
a first fixed terminal piece at the one end of the envelope, the first fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a fixed reed piece having a distal end portion and extending centerward from the one end portion of the first fixed terminal piece in a longitudinal direction of the reed switch;
a second fixed terminal piece spaced apart from the first fixed terminal piece at the one end of the envelope, the second fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a third fixed terminal piece at the other end of the envelope, the third fixed terminal piece having one end portion inside the envelope and another end portion outside the envelope;
a movable reed piece inside the envelope, the movable reed piece having a base end portion, a distal end portion, and a movable contact portion, the base end portion facing the one end portion of the third fixed terminal piece across a magnetic gap, the distal end portion being configured to come into contact with the fixed reed piece, the movable contact portion being further centerward than the distal end portion in a longitudinal direction of the reed switch;
a first spring member having a base end portion secured to the fixed reed piece and a distal end portion configured to come into contact with the movable contact portion;
a second spring member having a base end portion secured to the second fixed terminal piece and a distal end portion configured to come into contact with the movable contact portion;
and
a third spring member having one end portion secured to the movable reed piece and another end portion secured to the third fixed terminal piece.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/364,326Filed 2 Feb 2012
Priority: JP 2011-05839016 Mar 2011
Published: 20 Sep 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H01H 36/0006
Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding:…
H01H 1/66
Protective enclosures, baffle plates, or screens for contacts: contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
H01H 36/0033
Permanent magnet actuating reed switches: mountings; Housings; Connections
H01H 51/287
Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic…:…