CN1396614A

CN1396614A - Electromagnetic relay with U-shaped yoke

Info

Publication number: CN1396614A
Application number: CN 02126736
Authority: CN
Inventors: 谭忠华
Original assignee: Xiamen Hongfa Electroacoustic Co Ltd
Current assignee: Xiamen Hongfa Electroacoustic Co Ltd
Priority date: 2002-07-19
Filing date: 2002-07-19
Publication date: 2003-02-12
Anticipated expiration: 2022-07-19
Also published as: CN1201361C

Abstract

An electromagnetic relay with U-shaped yoke is composed of a contact system, a magnetic circuit system, a base and a shell. The contacts ystem consists of normally open and normally closed reeds, moving reed, and drive block. The magnetic circuit system comprises coil unit, U-shaped yoke and armature. Its advantages are little leakage flux, high magnetic efficiency and high attraction to armature.

Description

U-shaped yoke electromagnetic relay

The present invention relates to a kind of electromagnetic relay, especially a kind of electromagnetic relay that adopts the U-shaped yoke.

Relay extensively applies in various household electrical appliance, the Industry Control electric equipment as a kind of electromechanical compo.In conventional small-sized DC electromagnetic relay, generally comprise coil, coil exit, iron core, yoke, armature, pushing block, movable contact spring, often open static contact spring piece, normally closed static contact spring piece, contact, base, shell.Wherein the magnetic circuit part generally is made up of coil, iron core, yoke, armature, iron core adopts riveting to be connected with yoke, and the pole-face unshakable in one's determination and the armature that pass bobbin form working gas gap, the magnetic circuit part is three, other adds two of part base, the bobbins of support section, number of spare parts is bigger, and cost is higher, causes product can't satisfy low price user's instructions for use.

In the electromagnetic relay of prior art, armature movement direction in the magnetic circuit part is generally along the length direction of iron core, unshakable in one's determination and yoke adopts riveted structure, armature moves on pole-face unshakable in one's determination, armature is in the side plate direction of coil, cause under same power, power consumption situation, the relay construction size is bigger.The CN1255232A patent application discloses a kind of relay with contact spring, and relay has electromagnet system and contact arrangement that has at least one quiet contact spring and at least one moving contact spring of a matrix, belt coil, iron core and an armature.The plate that this contact spring makes the plane respectively with do not have permanent bend to approach at identical plane internal fixation in this matrix.This contact spring is realized the closing of contact by the overlap joint of L shaped end section; In addition, quiet contact spring produces pre-stretching by a corresponding backstop on the matrix.

The object of the present invention is to provide that a kind of magnetic structure is simple, number of spare parts is few, assembling, good manufacturability, can carry out the production of batch flowing water, performance/volume ratio and P/C are than the electromagnetic relay that all is better than existing like product, its input, output reach higher dielectric withstanding voltage, insulation distance can reach VDE0110 fully, part reaches the VDE0700 authentication, can satisfy low price, high performance customer requirements, can be widely used in the white environmental protection household appliances.

The said electromagnetic relay of the present invention, it mainly is made up of contact system, magnetic circuit system, base and shell, and contact system comprises often opens static contact spring piece part, normally closed static contact spring piece part, movable contact spring part and pushing block; Magnetic circuit system comprises coiler part, yoke and armature.Yoke is a U-shaped, and its transverse arm and perpendicular upper-arm circumference form flux path around coil, and iron core passes hub of a spool and is connected with yoke.Two edge of a knife faces of yoke form 3 parallel working gas gaps with pole-face unshakable in one's determination, armature working face.

It is cylindrical that iron core is preferably oval pole-face, passes the iron core and the yoke riveted joint of hub of a spool.

It is tabular that armature is preferably, and it rotates the limit and is bearing on two edges of a knife of yoke sliding shoe of the free termination of armature.

Bobbin and base are integrated, and a side plate of bobbin is designed to extend after the broadening structure function with base.

Because magnetic structure provided by the invention adopts the U-shaped yoke structure, the cylindrical riveting dress of oval pole-face core construction, its armature is common rotation clapper-type platy structure, two edge of a knife faces of U-shaped yoke and pole-face unshakable in one's determination and armature working face form three working gas gaps, yoke is centered around around the coil, can assemble magnetic circuit leakage flux on every side effectively, guarantees that magnetic circuit obtains maximum magnetic flux, effectively improve magnetic circuit efficient, thereby increase the suction of armature.In addition, the bobbin and the base of this magnetic structure adapted are integrated, and adopt semi-enclosed cavity, and contact system is surrounded, increased effectively relay input and output electric clearance, creepage distance, penetrate insulation distance, satisfy the authentication of VDE reinforced insulation system fully.Simultaneously, owing to adopt a side plate of bobbin to be designed to extend after the broadening structure function with base, design has the narrow groove of the contact system of fixed relay above, contact system can be installed reliably, reduced by a base part, the part of contact system is fixed on the base by plug-in mounting, easily is automated operation.This is simple for structure, assembling is simple, can realize producing in batches under less equipment, and its performance is better than existing similar relay.

Fig. 1 is the electromagnetic relay structural representation of the embodiment of the invention.

Fig. 2 is the electromagnetic relay decomposing schematic representation of the embodiment of the invention.

Fig. 3 is the yoke structure schematic diagram of the embodiment of the invention.

Fig. 4 is the core construction schematic diagram of the embodiment of the invention.

Fig. 5 is the armature structure schematic diagram of the embodiment of the invention.

Fig. 6 is the understructure schematic diagram of the embodiment of the invention.

As Fig. 1, shown in 2, the present invention is made up of magnetic circuit system, contact system, base and shell.Contact system comprises movable contact spring 1, often opens static contact spring piece 2, normally closed static contact spring piece 3 and pushing block 4, and inserts in the base 7 by corresponding hole on the base.Magnetic circuit system comprises yoke 5, armature 6, bobbin and base 7 integrators.

Yoke 5 structure (referring to Fig. 3) that takes the shape of the letter U, its transverse arm 51,

perpendicular arm

52 and 53 form flux path around coil, its transverse arm (i.e. bottom) 51 snaps in part 73 (referring to Fig. 6) between coil side plate and base insulating barrier, and the insulating barrier of base 7 and the part of the bobbin in the electromagnetic system (side plate) 72 fuse.Hub of a spool has the cylindrical core 8 of an oval pole-face 81, adopts riveted joint with yoke 5.

Referring to Fig. 5, the rotation limit 61 of tabular armature 6 is bearing on two edges of a knife 54,55 of yoke 5, the free end 62 of armature 6 is connected with a sliding shoe, the working face of armature 6 forms 3 parallel working gas gaps with unshakable in one's determination 8 pole-face 63, two edge of a knife faces 54,55 of yoke 5, improve magnetic circuit efficient effectively, can improve the sensitivity of relay.

The base fixedly part 74 of contact system can be designed to semiclosed shape, the electromagnetic system and the contact system of 75,76,77 pairs of relays of insulating barrier can carry out effective isolation, improve relay insulation index, make its electric clearance, creepage distance, penetrate insulation distance and satisfy reinforced insulation requirement in the VDE standard.Base plate 8 is located at the bottom.Design has a hole 64 on armature 6 in addition, it matches with projection 78 on the side plate 72 of bobbin, and restriction armature 6 moves upward, and matches with boss 79 on the bobbin in the rotation limit 61 of armature 6, the double swerve amount of restriction armature makes armature have the amount of spin of certain angle again simultaneously.

Claims

1, U-shaped yoke electromagnetic relay is made up of contact system, magnetic circuit system, base and shell, and contact system comprises often opens static contact spring piece part, normally closed static contact spring piece part, movable contact spring part and pushing block; Magnetic circuit system comprises coiler part, yoke and armature, it is characterized in that yoke is a U-shaped, its transverse arm and perpendicular upper-arm circumference form flux path around coil, iron core passes hub of a spool and is connected with yoke, and two edge of a knife faces of yoke form 3 parallel working gas gaps with pole-face unshakable in one's determination, armature working face.

2, U-shaped yoke electromagnetic relay as claimed in claim 1, it is characterized in that unshakable in one's determination is that oval pole-face is cylindrical, passes the iron core and the yoke riveted joint of hub of a spool.

3, U-shaped yoke electromagnetic relay as claimed in claim 1 is characterized in that armature is tabular, and it rotates the limit and is bearing on two edges of a knife of yoke.

4, U-shaped yoke electromagnetic relay as claimed in claim 3 is characterized in that sliding shoe of free termination of armature.

5, U-shaped yoke electromagnetic relay as claimed in claim 1 is characterized in that bobbin and base are integrated, and a side plate of bobbin is designed to extend after the broadening structure function with base.