CN2733575Y

CN2733575Y - An electromagnetic relay with low noise

Info

Publication number: CN2733575Y
Application number: CN 200420051703
Authority: CN
Inventors: 鹿庆焱
Original assignee: XIAMEN HONGMEI ELECTRONIC CO Ltd
Current assignee: XIAMEN HONGMEI ELECTRONIC CO Ltd
Priority date: 2004-06-15
Filing date: 2004-06-15
Publication date: 2005-10-12
Anticipated expiration: 2014-06-15

Abstract

Disclosed is an electromagnetic relay with low noise, comprising an iron core, a coil, a yoke iron, an armature, a static reed, a movable reed and a pushing block. The coil is winded on the iron core; the armature is in L shape, and the folding angle is a littler bigger than 90 degrees; the first edge is opposite to the center of the iron core, and the second edge is opposite to the yoke iron; the pushing block is topped on the second edge of the armature and fixed on the movable reed; the static reed is opposite to the movable reed and keeps a certain distance with the movable reed; both ends of the coil are provided with the accessing ends of the power supply, and the movable reed and the static reed are provided with exiting ends; a buffer reed is arranged on the opposite surface of the yoke iron to the second edge of the armature. When releasing the electromagnetic relay of the utility model, the armature and the yoke iron are not directly collided, but slow contacted through the buffer reed, and thus the noise is very small.

Description

A kind of low noise electromagnetic relay

Technical field

The utility model relates to a kind of electromagnetic relay, the extremely low electromagnetic relay of noise that produces when specifically being meant a kind of release.

Background technology

Electromagnetic relay is widely used in various household electrical appliance, electromechanical equipment, is used for the break-make of control circuit.The primary structure of electromagnetic relay of the prior art comprises magnetic circuit part and contact portion, magnetic circuit partly comprises iron core, coil, yoke and armature, contact portion comprises static contact spring piece, movable contact spring and pushing block, coil is set around on the iron core, armature is L shaped, its knuckle is slightly larger than 90 degree, its first limit is facing to iron core, second limit is fixedly connected with pushing block, and facing to yoke, when coil is in off-position, movable contact spring is pressed against this second limit on the yoke by pushing block, the iron core certain distance is then left on first limit, and when coil electricity, this first limit is by the iron core adhesive, the yoke certain distance is left on second limit, and, movable contact spring is contacted with static contact spring piece, thereby the circuit of its control is connected by pushing block promotion movable contact spring.

When coil when "on" position becomes off-position, movable contact spring is pressed against on the yoke by second limit of pushing block with L shaped armature, this process armature and yoke have produced collision, thereby produced bigger noise, switch or the noise that manually occurs during demagnetization is exactly consequent in frequency as display.

The utility model content

The utility model provides a kind of low noise electromagnetic relay, its main purpose be to overcome existing electromagnetic relay when discharging because armature and yoke collision have produced the shortcoming of noise greatly.

The utility model adopts following technical scheme: a kind of low noise electromagnetic relay, comprise iron core, coil, yoke, armature, static contact spring piece, movable contact spring and pushing block, coil is set around on the iron core, armature is L shaped, the angle of its knuckle is slightly larger than 90 degree, its first limit is relative with the center of iron core, second limit is relative with yoke, pushing block relies on second limit of armature, and be fixed on the movable contact spring, static contact spring piece is relative with movable contact spring and keep certain distance, the coil two ends are provided with power access end, movable contact spring and static contact spring piece are provided with exit, and yoke and the L shaped armature second limit opposite face are provided with a buffering reed, and the collision to yoke and L shaped armature second limit when this electromagnetic relay discharges of this buffering reed plays cushioning effect.

Aforesaid yoke is provided with a making leaf spring, this making leaf spring comprises integrated plates and crozier, plates are fixed on the opposite face on yoke and L shaped armature second limit, L shaped armature second limit is provided with a through hole by its corner positions, the crozier of making leaf spring passes this through hole, the bight of armature is pressed against the yoke end, and the plates of this making leaf spring partly are upturned and form described buffering reed.

By above-mentioned description to the utility model structure as can be known, compare with prior art, the utlity model has following advantage: electromagnetic relay of the present utility model is when discharging, armature and yoke can directly not bump, and through cushioning the buffering of reed, slowly contact, thereby the noise of its generation is minimum.

Description of drawings

Fig. 1 is the planar structure schematic diagram of the utility model attracting state;

Fig. 2 is the planar structure schematic diagram of the utility model release condition;

Fig. 3 is the perspective view of the utility model release condition, has removed coil among the figure;

Fig. 4 pulls down perspective view behind coil and the armature for the utility model.

Embodiment

Below in conjunction with Fig. 1 to Fig. 4, describe an embodiment of the present utility model in detail.

Low noise electromagnetic relay, comprise pedestal 10, iron core 1, coil 2, yoke 3, armature 4, static contact spring piece 62, movable contact spring 61 and pushing block 7, iron core 1, yoke 3, static contact spring piece 62 and movable contact spring 61 all with pedestal 10 vertical fixing, yoke 3 is positioned at iron core 1 next door, static contact spring piece 61 and movable contact spring 62 are relative and keep certain distance, and coil 2 is set around on the iron core 1.

Armature 4 is L shaped, the angle of its bight 43 knuckles is slightly larger than 90 degree, its first limit 41 is relative with the center of iron core 1, second limit 42 is relative with yoke 3, yoke 3 is provided with a making leaf spring 5, this making leaf spring 5 comprises integrated plates 51 and crozier 52, plates 51 are fixed on the opposite face on yoke 3 and L shaped armature 4 second limits 42, L shaped armature 4 second limits 42 are provided with a through hole 510 by its 43 positions, bight, the crozier 52 of making leaf spring 5 passes this through hole 510, the bight 43 of armature 4 is pressed against yoke 3 ends, and with reference to Fig. 1 and Fig. 4, plates 51 parts of this making leaf spring 5 are upturned and form a buffering reed 53.Pushing block 7 relies on second limit 42 of armature 4, and is fixed on the movable contact spring 61.

Coil 2 two ends are provided with power access end 20, and movable contact spring 61 is provided with exit 610, and static contact spring piece 62 is provided with exit 620, and that movable contact spring 61 and static contact spring piece 62 can be provided with as required is a pair of, two pairs or how right.During application, on pedestal 10, cooperate a housing, iron core 1, coil 2, yoke 3, armature 4, static contact spring piece 62, movable contact spring 61 and pushing block 7 etc. are enclosed in the housing, with the power access end 20 access control circuit at coil 2 two ends, the exit 610,620 of movable contact spring 61, static contact spring piece 62 is inserted the circuit of break-make that this relay is controlled.

When coil 2 is in off-position, movable contact spring 61 is pressed against on the yoke 3 by second limit 42 of pushing block 7 with L shaped armature 4 under the elastic force effect of itself, iron core 1 certain distance is left on 41 on first limit, when coil 2 energisings, this first limit 41 is by iron core 1 adhesive, and yoke 3 certain distances are left on second limit 42, and promotes movable contact spring 61 by pushing block 7, movable contact spring 61 is contacted with static contact spring piece 62, thereby the circuit of its control is connected; When coil 2 when "on" position becomes off-position, movable contact spring 61 rebounds to yoke 3 directions under himself elastic force effect, by pushing block 7 yoke 3 is pressed on second limit 42 of L shaped armature 4, strong collision can not take place with yoke 3 in second limit 42 under the effect of buffering reed 53, thereby the noise of its generation is minimum.

Above-mentioned only is an embodiment of the present utility model, but design concept of the present utility model is not limited thereto, and allly utilizes this design that the utility model is carried out the improvement of unsubstantiality, all should belong to the behavior of invading the utility model protection range.

Claims

1, a kind of low noise electromagnetic relay, comprise iron core, coil, yoke, armature, static contact spring piece, movable contact spring and pushing block, coil is set around on the iron core, armature is L shaped, the angle of its knuckle is slightly larger than 90 degree, its first limit is relative with the center of iron core, second limit is relative with yoke, pushing block relies on second limit of armature, and be fixed on the movable contact spring, static contact spring piece is relative with movable contact spring and keep certain distance, and the coil two ends are provided with power access end, movable contact spring and static contact spring piece are provided with exit, it is characterized in that: yoke and the L shaped armature second limit opposite face are provided with a buffering reed.

2, a kind of low noise electromagnetic relay as claimed in claim 1, it is characterized in that: described yoke is provided with a making leaf spring, this making leaf spring comprises integrated plates and crozier, plates are fixed on the opposite face on yoke and L shaped armature second limit, L shaped armature second limit is provided with a through hole by its corner positions, the crozier of making leaf spring passes this through hole, and the bight of armature is pressed against the yoke end, and the plates of this making leaf spring partly are upturned and form described buffering reed.