CN203179804U

CN203179804U - Relay

Info

Publication number: CN203179804U
Application number: CN 201320221584
Authority: CN
Inventors: 林茂豪
Original assignee: DONGGUAN CHUROD ELECTRONICS Co Ltd
Current assignee: CHUROD ELECTRONICS CO., LTD.
Priority date: 2013-04-26
Filing date: 2013-04-26
Publication date: 2013-09-04
Anticipated expiration: 2023-04-26

Abstract

Disclosed is a relay comprising a housing, an I-shaped permanent magnet and an electromagnet. An input terminal and an output terminal that are connected to a controlled circuit are disposed on the housing; an elastic contact piece is fixedly installed on the housing; the fixed end of the elastic contact piece is electrically connected with the input terminal; and an upper part of the free end of the elastic contact piece is provided with a moving contact under a static contact which is disposed on a lower surface of the output terminal. Two ends of one wing plate of the permanent magnet are S poles; two ends of the other wing plate are N poles; a web plate of the permanent magnet is pivoted on the housing; and the permanent magnet is provided with a swing arm for upwardly pressing the free end of the elastic contact piece. Each of two ends of the electromagnet is provided with a control arm; ends of the two control arms are respectively polar ends of the electromagnet; and the ends of the two control arms are disposed between the two swing plates of the permanent magnet and on two sides of the web plate of the permanent magnet. According the utility model, the permanent magnet is applied to the relay for controlling the circuit to be switched on or switched off or maintained, so that the relay is high in safety and reliability, and the application scope of the relay is enlarged.

Description

A kind of relay

Technical field

The utility model relates to a kind of relay.

Background technology

Relay is a kind of electric control device commonly used, and it is actually a kind of automatic switch that utilizes the big electric current running of little Current Control, so relay plays effects such as automatic adjusting, safeguard protection, change-over circuit in circuit.

Existing electromagnetic relay mainly is absorption armature when the controlled work of electromagnet, with spring compression or stretching, switches the connection in realization work loop by the contact, when electromagnet is controlled when being in non operating state, spring is replied, and pulling armature resets, and realizes the disconnection in work loop.Owing to need to adopt spring as resetting means, the function that does not possess holding circuit, make that assembly technology and the structure of existing relay are comparatively complicated, realize that modular cost is higher, and, the fatigue life of spring is limited and aging easily, has seriously influenced reliability and the fail safe of relay.

In order to improve the defective that the relay that adopts spring exists reliability and fail safe, some relays adopt the opposed structure of double electromagnet, break-make by the controlled realization operating circuit of rotating of double electromagnet, such relay assembly technology and structure are comparatively complicated, and cost and failure rate are higher.

The utility model content

At the deficiencies in the prior art, the purpose of this utility model is intended to provide a kind of relay, and it utilizes permanent magnet to realize control to controlled circuit having higher reliability and fail safe, and manufacture craft and structure are comparatively simple.

For achieving the above object, the utility model adopts following technical scheme:

A kind of relay comprises,

Housing, be connected with on this housing for the input terminal and the lead-out terminal that connect controlled circuit, be installed with elastic contact blade on the housing, the stiff end of this elastic contact blade and input terminal electrically connect, and its free end top is provided with the moving contact of the fixed contact below that is positioned at the lead-out terminal lower surface;

Permanent magnet, be " worker " font, the two ends of one of them wing plate of this permanent magnet are the S utmost point, and the two ends of another wing plate are the N utmost point, the web of permanent magnet is articulated on the housing, and has one on this permanent magnet for make progress the free-ended swing arm of roof pressure elastic contact blade when permanent magnet rotates;

Electromagnet, its two ends are respectively arranged with a control arm, and the end of two control arms is respectively the polar end of this electromagnet, and the end of two control arms is all between permanent magnet two wing plates and the both sides of the permanent magnet web that is placed in.

The upper flange two ends of permanent magnet are the S utmost point, and the two ends of its lower wing plate are the N utmost point.

Two control arms all are inverted " L " shape, and the bending section on its top penetrates and places between two wing plates of permanent magnet by the end of permanent magnet.

The stiff end of elastic contact blade and input terminal electrically connect by a metal connecting sheet that is fixed on the housing, and an end of the corresponding elastic contact blade of metal connecting sheet forms one and is used for the fixedly fixed part of the stiff end of elastic contact blade.

Be socketed with an eddy current sensor on the metal connecting sheet, this eddy current sensor is for detection of the electric current situation of change on the process metal connecting sheet, and the signal that detected electric current changes is sent to for the control module of controlling electromagnet, and control module is used for according to this signal controlling current of electromagnet direction that receives.

The beneficial effects of the utility model are:

Than prior art, in the parts of relay of the present utility model, except eddy current sensor, electromagnet, control module and housing, other parts all can adopt metal material, be easy to processing and assembling, reduced the cost of relay, reduced the volume of relay; Permanent magnet is applied in the relay, the closure of control circuit, disconnection or maintenance, reaction speed is fast, has higher reliability and fail safe.And the utility model can be applied to relay increase the scope of application of relay in earth leakage protective socket or the switch.

Description of drawings

Fig. 1 is the external view of the utility model relay;

Fig. 2 is the interior views of the utility model relay;

Fig. 3 is the permanent magnet of the utility model relay and the assembling schematic diagram of electromagnet;

Fig. 4 is a kind of working state schematic representation of the utility model;

Fig. 5 is the another kind of working state schematic representation of the utility model;

Wherein: 10, housing; 11, input terminal; 12, lead-out terminal; 121, fixed contact; 14, metal connecting sheet; 15, eddy current sensor; 20, elastic contact blade; 21, moving contact; 22, stiff end; 23, free end; 30, permanent magnet; 31, web; 32, upper flange; 33, lower wing plate; 34, swing arm; 35, cross bar; 40, electromagnet; 41, control arm; 42, control arm.

Embodiment

Below, by reference to the accompanying drawings and embodiment, the utility model is described further:

Shown in Fig. 1,2,3,4,5, relay of the present utility model comprises housing 10, elastic contact blade 20, permanent magnet 30, electromagnet 40; Housing 10 bottoms fixedly are useful on the input terminal 11 that connects controlled circuit, and its top then fixedly is useful on the lead-out terminal 12 that connects controlled circuit, and the lower surface of lead-out terminal 12 has a fixed contact 121.Elastic contact blade 20 is positioned at housing 10 inside, have on it one with fixing stiff end 22 and the free end 23 of housing 10, have a moving contact 21 that is positioned under the fixed contact 121 at free end 23 upper surfaces of elastic contact blade 20; Input terminal 11, lead-out terminal 12, elastic contact blade 20 all are to be made by metal material, and it has the excellent electrical property conduction property.Input terminal 11 electrically conducts with the stiff end 22 of elastic contact blade 20, concrete is, in housing 10 internal fixation metal connecting sheet 14 is arranged, one end of metal connecting sheet 14 connects input terminal 11, the other end is through stiff end 22 places of the through elastic contact blade 20 of bending, and this end of metal connecting sheet 14 forms one and is used for fixedly connected and thereon the fixed part of electrically conducting with the stiff end 22 of elastic contact blade 20, thereby, when the free end 23 of elastic contact blade 20 makes progress activity, the moving contact 21 of free end 23 upper surfaces moves upward, thereby contact conducting with fixed contact 121, finally make input terminal 11 and lead-out terminal 12 conductings.

Above-mentioned permanent magnet 30 is " worker " font, the two ends of its upper flange 32 are the S utmost point, the two ends of lower wing plate 33 are the N utmost point, 31 of the webs of permanent magnet 30 are articulated on the housing 10, thereby, make upper flange 32 and lower wing plate 33 form a lever, the two ends of upper flange 32 and lower wing plate 33 are the two ends of lever respectively, and, all forming a top in each end of lever is the S utmost point, the bottom is the magnetic field of the N utmost point, the top of permanent magnet 30 has a swing arm 34, the outboard end of this swing arm 34 can swing up and down when permanent magnet 30 rotates with respect to housing 10, and when this swing arm 34 was upwards swung, it was used for the free end 23 of roof pressure elastic contact blade 20, is that the moving contact 21 on the elastic contact blade 20 contacts conducting with the fixed contact 121 of lead-out terminal 12 bottoms.

Electromagnet 40 is mainly used in when connecting control module, the rotation of control permanent magnet 30, thereby the break-make of control controlled circuit, it comprises control arm 41 and the control arm 42 that lays respectively at its two ends, the top ends of control arm 41 and control arm 42 is two polar ends of electromagnet 40 respectively, the top ends of control arm 41 and control arm 42 is all between the upper flange 32 and lower wing plate 33 of permanent magnet 30, and the head portion of control arm 41 and control arm 42 places the both sides of the web 31 of permanent magnet 30, namely and the top ends of control arm 41 and control arm 42 be positioned at the two ends of above-mentioned permanent magnet 30 formed levers respectively, in order to make control arm 41 and control arm 42 top ends place fully in the formed magnetic field, permanent magnet 30 ends, control arm 41 and control arm 42 can be processed into the top towards the bending part of permanent magnet 30 1 side bendings, make it be inverted " L " shape, like this, inside bending part penetrates and places between the upper flange 32 and lower wing plate 33 of permanent magnet 30 by the end of permanent magnet 30.Electromagnet 40 comprises magnetic core and the coil that is enclosed within the magnetic core outside, and control arm 41 and control arm 42 are actually the both ends of magnetic core, and the lead-in wire of coil is used for being connected with control module; Certainly, control arm 42 can be other shapes also, as strip, as long as guarantee that it can be between the upper flange 32 and lower wing plate 33 of permanent magnet 30.

In use, access input terminal 11 with controlled circuit, lead-out terminal 12, the lead-in wire of electromagnet 40 is link control module (being control circuit or controller) then, referring to Fig. 4, under the normal condition, electromagnet 40 energisings, at this moment, the end of control arm 41 is the N utmost point, the end of control arm 42 is the S utmost point, permanent magnet 30 is subjected to downward magnetic force near an end of control arm 41, and an end of permanent magnet 30 close control arms 42 is subjected to magnetic force upwards, thereby makes the swing arm 34 on permanent magnet 30 tops be in upwards maximum displacement place of swing, and the outboard end of swing arm 34 is upwards pushed the free end 23 of elastic contact blade 20, moving contact 21 is contacted with fixed contact 121, thereby keep input terminal 11 and lead-out terminal 12 to electrically conduct.When appearance in the loop of controlled circuit is unusual, control module changes the energising direction of coil in the electromagnet 40, thereby change the magnetic pole of electromagnet 40, the end that makes control arm 41 is the S utmost point, the end of control arm 42 is the N utmost point, in this case, permanent magnet 30 is subjected to magnetic force upwards near an end of control arm 41, permanent magnet 30 then is subjected to downward magnetic force near an end of control arm 42, thereby in the moment that electromagnet 40 is oppositely switched on, permanent magnet 30 clockwise rotates an angle, the outboard end that drives swing arm 34 moves downward maximum displacement place, the free end 23 of the outboard end of swing arm 34 and elastic contact blade 20 breaks away from, elastic contact blade 20 is returned to original form, and moving contact 21 and fixed contact 121 break away from, thereby controlled circuit is disconnected.

In addition, on above-mentioned metal connecting sheet 14, also be socketed with an eddy current sensor 15, this eddy current sensor 15 is for detection of through the electric current situation of change on the metal connecting sheet 14 (being the situation of current anomaly in the loop of controlled circuit), and the signal that detected electric current changes is sent to for the control module of controlling electromagnet 40, and control module is used for the sense of current according to this signal controlling electromagnet 40 that receives.

Permanent magnet 30 of the present utility model can be above-mentioned integrated " worker " font structure, also can be to be constituted by shell and the two blocks of magnet that are inserted into enclosure that are articulated on the housing 10, two blocks of magnet are opposed up and down, as long as guarantee that its two polar end is with above-mentioned consistent.

Also two input terminals 11 and two lead-out terminals 12 can be installed simultaneously in twos in correspondence with each other on housing 10, connect two controlled circuits respectively, and 20, two elastic contact blades of two elastic contact blades 20 that arrange in housing 10 inner couplings are distinguished corresponding two lead-out terminals 12.Outboard end in swing arm 34 connects a cross bar 35, the two ends of cross bar 35 lay respectively at the below of two elastic contact blade 20 free ends 23, when swing arm 34 is upwards swung, the two ends of cross bar 35 are two elastic contact blades 20 of roof pressure upwards respectively, swing arm 34 is along with permanent magnet 30 during to lower swing, then cross bar 35 discharges the roof pressure power to two elastic contact blades 20 simultaneously to lower swing.

In the parts of the utility model relay, except eddy current sensor 15, electromagnet 40, control module and housing 10, other parts all can adopt metal material, be easy to processing and assembling, reduced the cost of relay, reduced the volume of relay, simultaneously, adopt electromagnet 40 control permanent magnets 30 to rotate, reaction speed is fast, and fail safe and reliability are higher.

To one skilled in the art, can make other various corresponding changes and deformation, and these all changes and deformation should belong within the protection range of the utility model claim all according to technical scheme described above and design.

Claims

1. a relay is characterized in that, comprise,

2. relay as claimed in claim 1 is characterized in that, the upper flange two ends of permanent magnet are the S utmost point, and the two ends of its lower wing plate are the N utmost point.

3. relay as claimed in claim 1 is characterized in that, two control arms all are inverted " L " shape, and the bending section on its top penetrates and places between two wing plates of permanent magnet by the end of permanent magnet.

4. relay as claimed in claim 1, it is characterized in that, the stiff end of elastic contact blade and input terminal electrically connect by a metal connecting sheet that is fixed on the housing, and an end of the corresponding elastic contact blade of metal connecting sheet forms one and is used for the fixedly fixed part of the stiff end of elastic contact blade.

5. relay as claimed in claim 4, it is characterized in that, be socketed with an eddy current sensor on the metal connecting sheet, this eddy current sensor is for detection of the electric current situation of change on the process metal connecting sheet, and the signal that detected electric current changes is sent to for the control module of controlling electromagnet, and control module is used for according to this signal controlling current of electromagnet direction that receives.