CN202549743U - Contactor with 7-to-15-ampere rated operational current - Google Patents

Abstract

The utility model provides a contactor with 7-to-15-ampere rated operational current. The contactor comprises a contactor housing, an electromagnetic mechanism accommodated inside the contactor housing, a contact unit equipped with a moving contact and a static contact, and a support member. The electromagnetic mechanism is provided with a coil, a static iron core, and a moving iron core that is positioned above the static iron core and is vertically separated from the static iron core. The support member is movably arranged inside the contactor housing. The moving iron core and the moving contact are arranged on the support member in a way that the moving contact can be correspondingly jointed to or disengaged from the static contact via the moving iron core. A vertical gap (i.e. an opening gap D) between the moving iron core and the static iron core is less than or equal to 3.5mm and greater than or equal to 2mm. Preferably, the height of the moving iron core is less than that of the static iron core, and a ratio of height between the moving iron core and the static iron core preferably ranges from 0.4 to 0.6.

Description

Contactor with 7 to 15 amperes of rated operational currents

Technical field

The utility model relates to the contactor field, in particular to A.C. contactor, relates in particular to the contactor with 7 to 15 amperes of rated operational currents.

Background technology

A.C. contactor is widely used in the for example break-make of motor of power equipment; It is usually mainly by contactor housing, the electromagnetic mechanism that comprises coil, static iron core and moving iron core (armature) and contact unit (comprising main contact unit and the optional auxiliary contact unit of establishing) and some other parts known in the art or structure (for example arc extinguishing structure, antagonistic spring and contact pressure spring etc.) formation; Its basic functional principle is through coil electricity; Thereby between static iron core and armature, produce electromagnetic attraction; The spring force that makes armature overcome antagonistic spring thus is attracted near also final and contacts static iron core, thereby the contact unit of contactor engages, and is perhaps opposite.

In existing design, design the width that A.C. contactor has the multiple of 9mm usually, be typically, the contactor of existing 38A and following amperage all has about 45mm or bigger width basically.Although have these contactors of 45mm width usually favorable applicability can be provided, it has significant disadvantages, and it is excessive for example to take up an area of the space, and especially width is excessive, and this is very unfavorable to more existing very compact installation occasion.To this, the inventor reverses existing custom and overcomes the multiple technologies difficulty, is desirable to provide the contactor with 7 to 15 ampere rated operational currents of a kind of width less than 45mm, and such contactor has advantages such as the installing space of saving, appearance looks elegant.

Summary of the invention

For this reason, the utility model provides a kind of contactor with 7 to 15 amperes of rated operational currents.It comprises: the contactor housing; Be accommodated in the electromagnetic mechanism in this contactor housing, this electromagnetic mechanism has coil, static iron core and is positioned at the top and the vertical isolated moving iron core of this static iron core; Contact unit with moving contact and fixed contact; Should be installed in such a way on this supporter with this moving contact by moving iron core; This moving contact can correspondingly engage or break away from this fixed contact with the motion of this moving iron core; Wherein, the vertical interval between this moving iron core and this static iron core promptly open distance for≤3.5mm and>=2mm

Preferably, moving iron core height is less than the static iron core height, and for example its aspect ratio is less than about 0.9.

Its technique effect is: through the setting of the utility model, except obtaining the effect that width significantly reduces, also have numerous other advantages according to 7 to 15 amperes the little amperage rated operational current contactor of the utility model.

In the prior art, the impulsive force when people can hope to reduce the adhesive of sound iron core usually also hopes in moving iron core attracting process, to have advantages of higher stability simultaneously.The impulsive force that produces when reducing adhesive is iron core weight to be compared as far as possible with static iron core weight reduce according to an important means of prior art.And in order in attracting process, to have higher adhesive stability, an important way is under the situation of other conditions permit, to improve the electromagnetic attraction of electromagnetic mechanism as far as possible.Now, research and propose, for the multiple factor of sound iron core; The aspect ratio of sound iron core has the greatest impact for electromagnetic attraction, if sound iron core aspect ratio is more little, then electromagnetic attraction reduces manyly more; And when sound iron core height is 1:1 basically; Under the constant situation of other condition, this electromagnetic mechanism for the utilization of magnetic flux near maximum, thereby electromagnetic attraction is also near maximum; And along with sound iron core aspect ratio further increases, electromagnetic attraction can not enlarge markedly (than sound iron core aspect ratio in 1 increase when following) again even possibly reduce.In addition, more existing researchs also show, along with the weight increase of moving iron core, also can cause electromagnetic attraction to increase, but its influence to electromagnetic attraction will be significantly less than aspect ratios.

In addition, it will be apparent to one skilled in the art that under the constant situation of other factors that along with the increase of opening distance, electromagnetic attraction can corresponding reducing.Therefore; In the prior art for as far as possible impulsive force and stable aspect obtain preferably compromise; Usually way when making that sound iron core aspect ratio keeps the basic 1:1 of being (even the aspect ratio of sound iron core is bigger), reduces moving iron core weight often as far as possible, for example in moving iron core, forms otch or excision portion etc.; And set usually its sound iron core open the distance usually greater than 5mm, more commonly in the scope of 6mm-7mm.

The inventor unexpectedly finds, if open distance greater than about 3.5mm, then for the little electromagnetic mechanism of moving iron core aspect ratio static iron core height; Electromagnetic attraction can sharply reduce; Aspect ratio is roughly the electromagnetic mechanism of 1:1, this situation then do not occur, perhaps this in confused situation showing; And if open distance≤about 3.5mm, the electromagnetic system that then aspect ratio is little is roughly 1:1 with regard to electromagnetic attraction and Yan Buhui is little too many than aspect ratio.

To this, the utility model is set and to be opened distance≤about 3.5mm and moving iron core height less than the static iron core height between moving iron core and this static iron core, and its aspect ratio is less than about 0.9; Thus; Can and provide under the situation of satisfactory rated operational current at routine work environment (for example non-heavily loaded environment), produce gratifying adhesive stability, can also significantly alleviate moving iron core weight simultaneously; Thereby advantageously reduce the adhesive impulsive force, increase the service life.Further, owing to open significantly reducing of distance, the electromagnetic system of contactor of the present invention can have small cross sectional, thereby narrower width can be set.In addition; Because moving iron core weight significantly reduces than prior art, thereby can make the multiple component size reduction that comprises the reaction force spring, even and under the electromagnetic attraction that reduces (for example approximately below the 6N; Prior art is typically about 8-11N); Good adhesive stability and the adhesive action of accelerating still can be provided, help reducing adhesive and impact, and help heat radiation.

Be that moving iron core height combines the utility model of the above-mentioned further feature of opening distance and the utility model to set the A.C. contactor that is applicable to little ampere of rated operational current with 7-15 ampere less than the static iron core height what this need further specify.And for more large-scale A.C. contactor, the A.C. contactor of 18-40 ampere for example, such setting is not too suitable usually; Its reason possibly be, because its amperage is bigger, in order to guarantee safe and stable operation; So it is also bigger that the minimum that correspondingly need be provided with is opened distance, need greater than 4.5mm usually, even more than the 6mm; If this open distance down again regulation move the iron core height less than the static iron core height, may bring the problem of electromagnetic attraction excessive attenuation as described above.

In addition, as the preferred version of the utility model, the ratio that the utility model has been set moving iron core height and static iron core height meticulously in the scope of about 0.4-about 0.6, more preferably about 11/20.Through setting like this, can more advantageously realize the contactor that width reduces, and contactor also have good, satisfactory at least performance.Aspect ratio preferably should be not too small, in order to avoid cause the required electromagnetic attraction that provides excessively to reduce, thereby system can not work, perhaps for needed electromagnetic attraction is provided, opens distance and will choose very for a short time, possibly influence the effect that dynamic/static contact is broken electric arc.Above-mentioned aspect ratio is preferably not excessive yet, otherwise for the DeGrain that reduces the impact aspect.

According to preferred embodiment of the utility model, " mountain " shape member that moving iron core and static iron core are configured to respectively put against each other.Although moving iron core and static iron core preferably are opposed " mountain " shape member, what can expect is that moving iron core and static iron core can adopt identical or different structure, for example move iron core and can adopt inverted U-shaped structure.

According to preferred embodiment of the utility model, open distance at the about about 3.4mm of 2.5mm-and preferably approximately in the scope of the about 3.4mm of 3.0mm-, more preferably be about 3.2mm.

According to embodiment of the utility model, contactor has the width of 27mm ± 3mm.More preferably, contactor has the width of about 27mm.Mention ground as preceding text, the inventor has overcome the prejudice of prior art, and the 45mm width that this area is set usually is reduced to about 27mm, significantly dwindles the contactor width, and this is highly beneficial for limited installing space.

According to preferred embodiment of the utility model; Base unit and base unit that the contactor housing comprises the interface arrangment that is arranged on contactor housing vertical distolateral, removably fixes each other through interface arrangment; Wherein this static iron core is contained in the base unit with this coil, and this moving iron core is contained in the base unit.Through so interface arrangment being arranged on the vertically distolateral of contactor housing, can help further reducing the width of contactor.

According to a preferred embodiment; Interface arrangment comprise the clamping that is arranged on one of base unit and base unit protruding with the clamping groove or the blocked hole that are arranged in base unit and the base unit on another; Wherein this clamping groove or blocked hole are formed in the wall extension portion of contactor housing; Interface arrangment also has around the protruding recess of clamping; This interface arrangment is configured to when clamping groove or blocked hole are gone in the protruding clamping of clamping that this wall extension portion is chimeric to be gone in this recess, thereby the internal face of this wall extension portion is close to the outside wall surface of this recess mutually.Can therefore the better fixing of base unit and base unit can be provided for interface arrangment provides additional fixing through the chimeric of this wall extension portion and recess, and can have beautiful outward appearance.

According to preferred embodiment of the utility model, also be provided with the limit stops of horizontal expansion in base unit and/or the base unit, be used to limit the lengthwise movement of static iron core and/or moving iron core.

Preferably; This contactor also comprises at least one the overhead type auxiliary contact with auxiliary moving contact and auxiliary fixed contact; This at least one overhead type auxiliary contact is connected on the supporter, thereby the motion that auxiliary moving contact can the servo-actuated iron core correspondingly engages or breaks away from auxiliary fixed contact.According to the utility model, in order further to reduce width, auxiliary contact is not set in the contactor housing preferably, and the side auxiliary contact preferably is not set, but through optionally providing the overhead type auxiliary contact to realize various controlled function.Preferred this overhead type auxiliary contact can be modular, and for example one or more one poles, one or more bipolar are not even got rid of and selected appropriate monopolar and bipolar auxiliary contact.Correspondingly, the supporter of the contactor of the utility model can have a plurality of interface arrangments with one or more auxiliary contact clampings.

Preferably, this supporter is processed by polyphenylene sulfide (PPS) material.The nylon that this material is selected for use than this area usually has higher rigidity; Therefore providing under the situation of same stiffness; The supporter that is made up of the PPS material can have littler width and thinner wall portion or board, and this also helps to reduce the overall width of contactor.

This coil comprises coil rack and winding; This coil rack is provided with a plurality of keepers that are clamped between base unit and the base unit, and said a plurality of keepers have and are used for the corresponding positioning recess/positioning convex that cooperates with the positioning convex/positioning recess that is arranged on the contactor housing.

According to another embodiment of the utility model, a kind of contactor with 7 to 15 amperes of rated operational currents is provided, comprising: the contactor housing; Be accommodated in the electromagnetic mechanism in this contactor housing, this electromagnetic mechanism has coil, static iron core and is positioned at the top and the vertical isolated moving iron core of this static iron core; Contact unit with moving contact and fixed contact; Movably be housed within the supporter in this contactor housing; Should so be installed on this supporter with this moving contact by moving iron core; The motion that promptly this moving contact can the servo-actuated iron core correspondingly engages or breaks away from fixed contact; Wherein, this contactor has the width of 27mm ± 3mm, more preferably has the width of about 27mm.This contactor overcomes the prejudice of prior art, and the 45mm width that this area is set usually is reduced to about 27mm, thereby has higher space adaptability and compact structure according to the contactor of the utility model.

Description of drawings

Below, specify the embodiment of the utility model in conjunction with accompanying drawing, wherein:

Fig. 1 illustrates the perspective view that decomposes according to the part of an embodiment of the contactor with 7 to 15 amperes of rated operational currents of the utility model;

Fig. 2 is the perspective view of the other direction of contactor shown in Figure 1;

Fig. 3 illustrates according to the configuration of the electromagnetic mechanism of the utility model, wherein specifically illustrated the size configurations contrast of moving iron core and static iron core and limit between them open distance

Fig. 4 has shown the perspective view according to the coil of the utility model.

Embodiment

Refer now to following explanation and accompanying drawing, specify the exemplary scheme of disclosed device.Although it is in order to present some embodiments of the utility model that accompanying drawing is provided, accompanying drawing needn't be by the plotted of specific embodiments, and some characteristic can be exaggerated, remove or part is dissectd to illustrate and to explain the disclosure of the utility model better.

Relating to " exemplary illustrating " or similar term in the specification means the special characteristic, structure and the characteristic that combine exemplary arrangement to describe and is included among at least one figure.Needn't be at a plurality of local phrases " in the accompanying drawings " that occur of specification or similar term all with reference to same accompanying drawing or example.Term " about " in the utility model or " approximately " will and will change according to the context of using this term by those of ordinary skills' understanding within the specific limits.If the use of this term is unclear to those skilled in the art in the given context of using this term, " pact " or " approximately " will refer to the plus-minus 5% of concrete numerical value or parameter value so.Mean from about X to Y from about X to about Y, wherein X and Y are occurrences.

Be used to describe some directional terminology of accompanying drawing hereinafter; For example " make progress ", " downwards " and other directional terminology; With being understood that to have its normal implication and relating to those directions when normally seeing accompanying drawing, and the contactor direction that used directional terminology is assert in will be with this area usually when describing contactor and parts thereof is as the criterion.For example, the side that contactor is provided with terminals is that of contactor is vertical distolateral, and should regard the front of contactor usually as; The vertical distolateral back side that should regard contactor usually as of another relative in contactor with this front; The base unit of contactor should regard the bottom surface of contactor as away from a side of base unit; And opposite with this bottom side in the contactor, be positioned at the end face (the overhead type auxiliary contact according to the utility model promptly is installed in this side) that top side on the base unit should be regarded contactor as.Thus; In the normal contactor of placing, front and back is the front and back side of contactor, and end face and bottom surface are the upper and lower sides of contactor; The left and right sides of contactor then constitutes two sides of this contactor respectively; Thereby perpendicular to or be approximately perpendicular to the direction of extending these two sides be contactor laterally, and the direction of between two vertical distolateral (front and back), extending be vertically, the direction of between end face and bottom surface, extending is for vertically.Therefore, " width " (lateral dimension) of contactor as herein described and correlated parts is meant contactor full-size in the horizontal.And the used term of the utility model " (moving iron core) opened distance " is meant; When coil is not switched on; Minimum vertical size at interval between static iron core and the vertical isolated moving iron core; Sometimes also can be called the total travel of moving iron core, or abbreviate total travel as, it is represented with Reference numeral D in Fig. 3.And open distance about what the utility model was mentioned, adopt implication commonly used in this area, that is, and the vertical interval when dynamic/static contact is opened between (when for example coil is not switched on) dynamic/static contact.Those skilled in the art will be appreciated that; The distance B of opening in contactor between moving iron core and the static iron core needs greater than the distance of opening between the dynamic/static contact; So that after the dynamic/static contact contact, moving iron core still need be walked LAP (being also referred to as " excess of stroke ") to guarantee the complete closure of dynamic/static contact.

Now, describe according to contactor 100 the utility model, that have 7 to 15 amperes of rated operational currents in conjunction with accompanying drawing.As above mention and as shown in figures 1 and 3, this contactor comprises: contactor housing 1; Be contained in the electromagnetic mechanism in the contactor housing 1, electromagnetic mechanism has coil 8, static iron core 6 and is positioned at the top and the vertical isolated moving iron core 12 of static iron core 6; Contact unit with moving contact 16 and fixed contact (not shown); Movably be housed within the supporter 14 in the contactor housing 1.Those skilled in the art also will understand; Contactor 100 can also comprise some other element or the structure that it is understood; For example arc extinguishing structure, antagonistic spring and contact pressure spring etc.; These are that those skilled in the art are familiar with and not crucial for the conception of the utility model, so be not described further at this.

Now, continue referring to Fig. 3.Coil 8 is placed on the static iron core 6, and here, moving iron core (armature) 12 is configured to " mountain " shape member opposite each other with static iron core 6.But what can expect is that moving iron core and static iron core also can be other suitable shape.As shown in Figure 3, moving iron core 12 and moving contact 16 are installed in preferably on the supporter of being processed by polyphenylene sulfide (PPS) material 14, thereby the motion that moving contact 16 can servo-actuated iron cores 12 correspondingly engages or breaks away from the fixed contact (not shown).In this article; As stated, the vertical interval between moving iron core 12 and the static iron core 6 is defined as opens distance B, open distance B≤about 3.5mm and>=about 2mm; Preferably; Opening distance in the scope of about about 3.4mm of 2.5mm-, in the scope of about about 3.4mm of 3.0mm-, more preferably is about 3.2mm more preferably.Those skilled in the art will be appreciated that; The distance of opening between moving iron core in the contactor and the static iron core needs greater than the distance of opening between the dynamic/static contact; The LAP (being also referred to as " excess of stroke ") so that moving iron core still need be walked after the dynamic/static contact contact is closed fully to guarantee dynamic/static contact.As stated, owing to open between the dynamic/static contact apart from being enough to guarantee to break the electric arc between them, therefore need be greater than certain minimum spacing, the lower limit of opening distance receives the constraint of this requirement thus.According to opening between the dynamic/static contact of the utility model apart from being preferably the about 2.2mm of about 1.8mm-.And as in the utility model about opening the constraint of distance range higher limit, described at preceding text, no longer repeat at this.

Still referring to Fig. 3, it illustrates moving iron core height H m and static iron core height H s, and here, moving iron core height H m is less than static iron core height H s.In an illustrated embodiment, moving iron core height H m is about 60mm, and static iron core height H s is about 110mm, and its aspect ratio Hm/Hs is approximately 11/20.And according to the utility model, moving iron core height can be set in the scope of 0.4-0.6 with the ratio Hm/Hs of static iron core height.

According to the utility model; Through setting moving iron core height and the ratio Hm/Hs of static iron core height and the scope of opening distance B; Can significantly reduce the width of each element of contactor (for example coil, antagonistic spring, contact and arc quenching plate); Thereby the integral body that realizes the contactor width reduces, and contactor for example as shown in Figure 1 has the width of about 27mm.The width that preferably has 27mm ± 3mm according to the contactor of the utility model.Compare with the contactor of 7 to 15 amperes of rated operational currents of the prior art, as to have the 45mm width; The contactor of the utility model has reduced about 1/3 width; Even width reduced approximately 40%, aspect compact conformation, has significant advantage with the installation aspect.

The further feature of the utility model is described referring to Fig. 1 and Fig. 2 now.As shown in Figure 2, contactor housing 1 comprises base unit 2 and base unit 4.Static iron core 6 (Fig. 1 and Fig. 2 are not shown) and coil 8 (Fig. 2) are contained in this base unit 2, and moving iron core 12 (Fig. 1) is contained in the base unit 4.In addition, contactor housing 1 also comprises the interface arrangment that is arranged on contactor housing vertical distolateral, and base unit 2 removably fixes through these interface arrangments with base unit 4 each other.

Specifically, as shown in Figure 2, vertically distolaterally be provided with the clamping protruding 32 that is positioned on the base unit 4 and be located at a blocked hole 34 on the base unit at first of contactor housing 1.Although be depicted as penetrating blocked hole at this, what can expect is to use impermeable clamping groove to substitute blocked hole.As shown in Figure 2, blocked hole 32 is formed in the wall extension portion 38 of contactor housing 1 (particularly being base unit 2), and also has around the recess 36 of clamping protruding 32 at base unit 4.When base unit 4 fixed base unit 2, promptly when clamping convexity 32 snaps in blocked hole 34, wall extension portion 38 is chimeric to be gone in the recess 36, thereby and the internal face of this wall extension portion 38 be close to mutually so that the clamping of reinforcement to be provided with the outside wall surface of this recess 36.More preferably, the top flush of the outside wall surface of wall extension portion 38 and recess 36.As shown in Figure 1, second vertically distolateral at contactor housing 1 correspondingly is provided with a pair of clamping protruding 22 that is positioned on the base unit 4 and is located at a blocked hole 24 on this base unit, and its wall extension portion 28 is provided with recess 36 also similarly in addition.In addition, as depicted in figs. 1 and 2, preferably in the said wall extension portion, around said blocked hole, be provided with reinforcement.

Although accompanying drawing is not shown; But preferably in base unit and/or base unit, be provided with the limit stops of horizontal expansion; With restriction static iron core and/or the lengthwise movement of moving iron core in attracting process, this helps further to improve the performance of the utility model contactor, for example stability.

As shown in Figure 2, supporter 14 (being also referred to as the contact support sometimes) preferably also is provided with at least one auxiliary contact interface arrangment 42.In addition; This contactor 100 also comprises at least one the overhead type auxiliary contact (not shown) with auxiliary moving contact and auxiliary fixed contact, and said auxiliary moving contact can correspondingly engage or break away from said auxiliary fixed contact on the said supporter with the motion of said moving iron core thereby wherein said at least one overhead type auxiliary contact is connected to.Through such setting, auxiliary contact can be set in the contactor housing, thereby help further reducing the width of contactor.

Forward Fig. 4 to, it shows the embodiment according to the coil 8 of the utility model particularly at present.As shown in Figure 4, coil 8 mainly contains coil rack 50 and constitutes with winding 51.This coil rack 50 is provided with two terminals 56.As shown in the figure, also be provided with 4 keeper 52a, 52b, 52c and 52d at its top according to the coil rack 50 of the utility model.They are limited by the fastening of base unit and base unit in the motion on vertical between base unit 2 and the base unit 4 thereby these keepers 52a, 52b, 52c and 52d are clamped in.These keepers 52a, 52b, 52c and 52d also have positioning recess 54, thereby it matches this coil rack 50 in the horizontal direction with the corresponding positioning convex (not shown) that for example is arranged in base unit, i.e. all around motion is limited.Preferably, thus these coil rack 50 these coils 8 have the width of about 27mm.Thus, the utility model has been realized the coil width that reduces, this part be because, when the sound iron core open distance from more hour, the width dimensions of winding can be provided with more for a short time.

Although the utility model openly shows a plurality of embodiment; And described many details of the contactor assembly of the utility model simultaneously through these embodiment, but the applicant does not plan the scope of the utility model is confined to or is restricted in any form these details.After reading the disclosure of the utility model, other advantage of the utility model is readily understood that with changing to those skilled in the art.Therefore, can under the situation of thought that does not break away from the desired the utility model of applicant and scope, make a change.

In addition, the utility model is not planned to be confined to into understanding so that implement the disclosed specific embodiments of optimal mode of the utility model, and will comprise all embodiment that fall into claims scope.The utility model can according to except that concrete said with shown in other form implement and do not deviate from its spirit and scope.The scope of the utility model is not to confirm with reference to above-mentioned explanation, and should be to confirm with reference to appending claims and all equivalency range that these claims had.The specification of the utility model will be interpreted as all novel and non-obvious combinations that comprise element that this paper describes, and any novelty and the non-obvious combination that can in the claim of the application or application subsequently, present these elements.

Claims (14)

1. the contactor (100) with 7 to 15 amperes of rated operational currents is characterized in that, comprising:

Contactor housing (1);

Be accommodated in the electromagnetic mechanism in this contactor housing (1), this electromagnetic mechanism comprises coil (8), static iron core (6) and is positioned at this static iron core (6) top and along vertically and the isolated moving iron core of this static iron core (12);

Contact unit with moving contact (16) and fixed contact;

Movably be housed within the supporter (14) in this contactor housing (1), this moving iron core (12) and this moving contact (16) are installed on this supporter in such a way, and this moving contact (16) can correspondingly engage or break away from this fixed contact with the motion of this moving iron core (12);

Wherein, the vertical interval between this moving iron core (12) and this static iron core (6) promptly open distance (D) for≤3.5mm and>=2mm.

2. contactor according to claim 1 (100) is characterized in that, the height (Hm) of this moving iron core (12) less than the height (Hs) of this static iron core (6) and its aspect ratio less than 0.9.

3. contactor according to claim 1 (100) is characterized in that, this moving iron core (12) is configured to " mountain " shape member opposite each other respectively with this static iron core (6).

4. contactor according to claim 2 (100) is characterized in that, the aspect ratio of this moving iron core (12) and this static iron core (6) is in the scope of 0.4-0.6.

5. contactor according to claim 4 (100) is characterized in that, this aspect ratio is 11/20.

6. according to each described contactor (100) in the claim 1 to 5, it is characterized in that this opens distance (D) in the scope of 2.5mm-3.4mm.

7. according to each described contactor (100) in the claim 1 to 5, it is characterized in that this contactor (100) has the width of 27mm ± 3mm.

8. according to each described contactor (100) in the claim 1 to 5; It is characterized in that; Base unit (2) and base unit (4) that this contactor housing (1) comprises the interface arrangment that is arranged on this contactor housing vertical distolateral, removably fixes each other through this interface arrangment; This static iron core (6) and this coil (8) are contained in this base unit (1), and this moving iron core (12) is contained in this base unit (4).

9. contactor according to claim 8 (100) is characterized in that, this interface arrangment comprises the clamping protruding (22 that is arranged on one of this base unit and this base unit; 32) and be arranged in this base unit and this base unit clamping groove or the blocked hole (24,34) on another, wherein this clamping groove or blocked hole are formed on the wall extension portion (28 of this contactor housing; 38) in, this interface arrangment also has around the protruding recess (26,36) of this clamping; This interface arrangment is configured to this wall extension portion (28 when this clamping protruding (22,32) snaps in this clamping groove or blocked hole (24,34); 38) chimericly go in this recess (26,36), thus this wall extension portion (28; The outside wall surface of internal face 38) and this recess (26,36) is close to mutually.

10. contactor according to claim 9 (100) is characterized in that, also is provided with the limit stops of horizontal expansion in this base unit and/or this base unit, the lengthwise movement that is used to limit this static iron core and/or should moves iron core.

11. according to each described contactor (100) in the claim 1 to 5; It is characterized in that; This contactor also comprises at least one the overhead type auxiliary contact with auxiliary moving contact and auxiliary fixed contact; This at least one overhead type auxiliary contact is connected on this supporter, thereby should can correspondingly engage or break away from this auxiliary fixed contact with the motion of this moving iron core by auxiliary moving contact.

12., it is characterized in that this supporter is processed by polyphenyl thioether material according to each described contactor (100) in the claim 1 to 5.

13. contactor according to claim 8 (100); It is characterized in that; This coil comprises coil rack and winding; This coil rack is provided with a plurality of keepers that are clamped between base unit and the base unit, and said a plurality of keepers have and are used for the corresponding positioning recess/positioning convex that cooperates with the positioning convex/positioning recess that is arranged on the contactor housing.

14. the contactor with 7 to 15 amperes of rated operational currents is characterized in that, comprising: contactor housing (1); Be accommodated in the electromagnetic mechanism in this contactor housing (1), this electromagnetic mechanism has coil (8), static iron core (6) and is positioned at the top and the vertical isolated moving iron core (12) of this static iron core (6); Contact unit with moving contact (16) and fixed contact; Movably be housed within the supporter (14) in this contactor housing (1); Being somebody's turn to do moving iron core (12) and this moving contact (16) so is installed on this supporter; Promptly this moving contact (16) can the servo-actuated iron core motion of (12) correspondingly engage or break away from fixed contact; Wherein, this contactor has the width of 27mm ± 3mm.

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