CN101777459B - Electromagnetic relay with simple structure and strong shock resistance - Google Patents

Electromagnetic relay with simple structure and strong shock resistance Download PDF

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Publication number
CN101777459B
CN101777459B CN201010123308A CN201010123308A CN101777459B CN 101777459 B CN101777459 B CN 101777459B CN 201010123308 A CN201010123308 A CN 201010123308A CN 201010123308 A CN201010123308 A CN 201010123308A CN 101777459 B CN101777459 B CN 101777459B
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push card
moving spring
free
armature
type structure
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CN101777459A (en
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刘金枪
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Xiamen Hongfa Electroacoustic Co Ltd
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Xiamen Hongfa Electroacoustic Co Ltd
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Abstract

The invention discloses an electromagnetic relay with a simple structure and strong shock resistance, which comprises a base, a magnetic circuit part, a contact part and a pushing clip; one end of an armature iron props against a pole face on one end of an iron core, as a free end, the other end of the armature iron is in clamped connection with the second end of the pushing clip, and the first end of the pushing clip is connected with the free end of a movable spring; the free end of the movable spring is provided with a first hook-type structure which is arranged along the thickness direction of the movable spring and bends to one side; the first end of the pushing clip is provided with a mouth-shaped structure which can be matched with the first hook-type structure of the movable spring, and the opening size of the mouth-shaped structure to be matched with the thickness direction of the movable spring is set to be larger than the size of the thickness of the movable spring and smaller than the size of the bending section of the hook-type structure; and the first hook-type structure is arranged at the upper mouth edge of the mouth-shaped structure in a matching way. When the structure is used and the relay is assembled, the pushing clip can not break away from the matching movable spring and the matching armature iron under any drastic shock. Therefore, the structure has good shock resistance as well as good falling resistance.

Description

A kind of electromagnetic relay of simple in structure, strong shock resistance
Technical field
The present invention relates to a kind of electromagnetic relay, particularly relate to a kind of electromagnetic relay of simple in structure, strong shock resistance.
Background technology
Current, along with the raising of living standards of the people, the application of household electrical appliance such as colour TV, air-conditioning, refrigerator, washing machine, water heater, soy bean milk making machine is more prevalent, and the trend of progressively promoting to zones such as samll cities and towns and rural areas is arranged; At developed countries such as North America, West Europe, except above-mentioned general household electrical appliance, high-grade household electrical appliance such as automatic dish-washing machine, electric heat mat, electronic masseur have also stepped into common family basically.
Electromagnetic relay is as the basic controlling element of household electrical appliance; Its application market field also constantly enlarges along with the continual renovation of various household electrical appliance; The new demand that client proposes also constantly increases along with the expansion of application; Relatively more typical requirement has: miniaturization, low-power consumption, low cost, highly reliable, anti-carrying, high capacity or the like;,, also be that client is with supply commercial city bottleneck more rambunctious particularly because the problem that the rash-and-rough way of loading and unloading in the product carrying (land transportation, sea-freight, air transport) occurs manifests day by day in the internationalization circulation epoch.
Current, the problem that the alleviation rash-and-rough way of loading and unloading brings mainly contains following several kinds of approach:
The one,, with the strict carrying contract of Freight Forwarder's signing; But what bring is the increase of freight cost;
The 2nd,, adopt packing with good carrying buffering; But what bring is the increase of manufacturing cost;
The 3rd,, design and make shock-resistant, the anti-product that falls that falls; This is undoubtedly best solution, but often runs into technical difficulty.
A kind of electromagnetic relay of prior art (see the patent No.: 200410048462.7), establish two convexities and cooperate with free-ended two circular holes of corresponding moving spring, and the other end and the armature of push card clamp by its push card one end.This design, easily in relay work because of the circular hole of the convexity of push card and the moving spring plastics bits that rub out, and under violent impact, the short time set that moves spring possibly make tripping in the protruding driven spring circular hole of push card, makes in the driven spring of push card to break away from; And the moment of push card both sides open distortion push card is broken away from from armature.Therefore, the impact resistance of this constructed products (the particularly anti-ability of falling of falling) is relatively poor relatively.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of electromagnetic relay of simple in structure, strong shock resistance is provided; Through improvement to syndeton between push card and the moving spring and between push card and the armature; Make after the relay assembling that push card can not break away under the impact of any fierceness, has good shock resistance and resists the ability of falling of falling from the moving spring that is mated and armature.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electromagnetic relay of simple in structure, strong shock resistance comprises base, magnetic circuit part, contact portion and push card; The moving spring and the quiet spring of contact portion are contained on the base respectively; This magnetic circuit partly comprises drum stand, enamelled wire, U sections core, armature and stage clip; U sections core is contained in the drum stand, and enamelled wire is wrapped in outside the drum stand that contains U sections core; One end of armature is fixed on by stage clip on the pole-face of iron core one end, and the other end clamps with second end of push card as free end and is connected, and first end of push card is connected with the free end of moving spring; The free end that should move spring is provided with along its thickness and colludes the type structure to first of side direction bending; First end of push card is provided with one can collude the degree of lip-rounding structure that the type structure matches with first of moving spring, and the size of opening that is used for being matched with the thickness direction that moves spring in this degree of lip-rounding structure is made as greater than the gauge of moving spring less than the bending segment size of colluding the type structure; This first colludes the upper edge place of type respective outer side edges in this degree of lip-rounding structure.
The free end of described moving spring also is provided with along its thickness and colludes the type structure to second of opposite side direction bending.
Free-ended first of described moving spring colludes the type structure towards the direction bending away from second end of push card, and free-ended second of described moving spring colludes the direction bending of type structure towards second end that points to push card.
Free-ended first of described moving spring colludes the type structure and is located at the moving free-ended middle part of spring, and free-ended second of said moving spring colludes the type structure and is located at the moving free-ended both wings of spring.
Second end of said push card is provided with two leg shape structures with certain amount of deflection by end along in end, extending, and the inboard of two leg shape structures is respectively equipped with a positioning convex; The free-ended both sides of armature are provided with a groove respectively; Free-ended two grooves of armature match with the positioning convex of two leg shape structures of push card respectively; End in two leg shape structures of push card is respectively equipped with a pin shape structure, in drum stand, is provided with cavity, and the terminal pin shape structure of two leg shape structures of push card is engaged in respectively in the cavity of drum stand opens with two leg shape structures of restriction push card laterally.
Described drum stand is made up of the extension of base.
Further, also comprise a stage clip, this stage clip is fixed on the base, and an end of said armature leans on the pole-face of iron core one end through stage clip.
A kind of assembly method of electromagnetic relay of simple in structure, strong shock resistance comprises:
A. with the iron core drum stand of packing into, and twine enamelled wire being equipped with on the drum stand of iron core;
B. will be connected with the moving spring of moving contact, quiet spring and the stage clip that is connected with fixed contact is respectively charged into base;
C. the degree of lip-rounding structure of push card first end is inserted in free-ended first of moving spring by approaching direction perpendicular to moving spring thickness and colludes the type structure; Rotate to then first collude the type structure opposite direction; Make first to collude the upper edge place of type respective outer side edges in degree of lip-rounding structure, second colludes the type respective outer side edges below the push card bottom face;
D. install on the iron core pole-face that is positioned at the base intracavity body end that is provided with hanging platform in the armature also temporary fixed;
E. two leg shape structures of push card are opened, the structural positioning convex of two leg shapes is snapped in free-ended two grooves of armature;
F. after the hanging platform of armature being pressed into the edge of a knife of iron core pole-face through stage clip, the pin shape structure with push card extend in the cavity of the drum stand that is made up of the base extension simultaneously, and two leg shape structures of push card can't be opened.
The electromagnetic relay of a kind of simple in structure, strong shock resistance of the present invention is to be fixing moving spring, quiet spring and stage clip of carrier with the base, is fixed with moving contact on the moving spring and is provided with moving spring pin, is fixed with fixed contact on the quiet spring and is provided with quiet spring pin; This base is provided with the extension that is used for twining enamelled wire and promptly is equivalent to drum stand, certainly, also can be with the drum stand design on the extension of base, this drum stand also can be an independent structures and being fixed on the base; And the extension that moving spring, quiet spring and stage clip are mounted to base is that drum stand is on the position of almost parallel; Iron core adopts U type structure, and this U sections core is embedded in the drum stand of base, and the pole-face at iron core two ends is all towards the direction that moving spring, quiet spring are installed; Enamelled wire is directly to be wrapped on the drum stand that iron core is housed; Armature is overlayed on the edge of a knife of iron core one end pole-face through the stage clip that is fixed in base; The effect of stage clip is to let an end of armature can overlay the edge of a knife to the iron core pole-face; Certainly; Also can not need stage clip, but directly be contained in an end of armature on the base and rely on the edge of a knife of iron core pole-face; The other end of armature is that free end then cooperates with second end of push card; First end of push card then matches with moving spring; Like this; Can the activity of armature be passed to moving spring through push card, the contact between the contact of realizing moving spring and the contact of quiet spring or separate promptly realizes the connection of relay contact and the switching function of branch deenergizing.In order to guarantee that push card can not break away from from the moving spring that is mated and armature; The free end of moving spring is provided with along its thickness and colludes the type structure to first of side direction bending; First end of push card is established degree of lip-rounding structure; Degree of lip-rounding structure can be a plurality of, but will have one can be used for colluding the type structure with first of moving spring and match at least, and the size of opening that promptly is used for being matched with the thickness direction of moving spring in this degree of lip-rounding structure is made as greater than the gauge of moving spring less than the bending segment size of colluding the type structure; So just can make spring free-ended first collude the type structure and match, push card can not colluded the type structure from first of the moving spring that cooperates with it break away from push card degree of lip-rounding structure.Second end of push card has certain length by end along two leg shape structures of in end, extending; Therefore also has certain amount of deflection; Can open laterally under external force, that is to say, in assembling; Can like a cork two leg shape structures of push card be opened, the positioning convex that push card two leg shape structures are inboard is encased in free-ended two grooves of armature; End in two leg shape structures of push card is respectively equipped with a pin shape structure; In drum stand, be provided with cavity; Pin shape structure through two leg shape structures of push card are terminal is engaged in respectively in the cavity of drum stand; Can limit two leg shape structures of push card and open laterally, two leg shape structures of the push card after so just can preventing to assemble receive to open after the fierce impact, and the positioning convex of push card two leg shape structures is broken away from from the groove of armature; The positioning convex that has guaranteed push card two leg shape structures can not break away from from the groove of armature, has guaranteed that promptly push card can not break away from from the armature that cooperates with it.
The invention has the beneficial effects as follows; Collude the type structure owing to adopted free end at moving spring to be provided with to first of side direction bending along its thickness; First end in push card is established degree of lip-rounding structure; And the size of opening that is used for being matched with the thickness direction of moving spring in this degree of lip-rounding structure is made as greater than the gauge of moving spring less than the bending segment size of colluding the type structure, and this structure makes push card under the impact of any fierceness, can not collude from first of the moving spring that cooperates with it to break away from the type structure; Owing to also be provided with along its thickness at the free end of moving spring and collude the type structure to second of opposite side direction bending, this structure make between push card and the moving spring articulate more firm; Because the end in two leg shape structures of push card is respectively equipped with a pin shape structure; In drum stand, be provided with cavity; The pin shape structure terminal through two leg shape structures of push card is engaged in respectively in the cavity of drum stand; Limit two leg shape structures of push card and opened laterally, thereby made push card under the impact of any fierceness, can from the armature that cooperates with it, not break away from.
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain; But a kind of electromagnetic relay simple in structure, strong shock resistance of the present invention is not limited to embodiment.
Description of drawings
Fig. 1 is a STRUCTURE DECOMPOSITION sketch map of the present invention;
Fig. 2 structural representation of the present invention;
Fig. 3 is the structural representation of the moving spring of the present invention;
Fig. 4 is the structural representation of armature of the present invention;
Fig. 5 is the structural representation of armature of the present invention (rollover states);
Fig. 6 is the structural representation of push card of the present invention;
Fig. 7 is the structural representation of push card of the present invention (rollover states);
Fig. 8 is an assembling sketch map one of the present invention;
Fig. 9 is an assembling sketch map two of the present invention;
Figure 10 is an assembling sketch map three of the present invention;
Figure 11 is an assembling sketch map four of the present invention.
Among the figure, 1: base; 1.1: the extension of base; 1.2: cavity; 2: moving spring; 2.1: moving spring free-ended first colludes the type structure; 2.2: moving spring free-ended second colludes the type structure; 3: quiet spring; 4: stage clip; 4.1: stage clip compress tongue; 5: iron core; 6: armature; 6.1: the Ka Tai of armature; 6.2: the groove of armature; 7: push card; 7.1: the degree of lip-rounding structure of push card; 7.2: the leg shape structure of push card; 7.3: the pin shape structure of push card; 7.2.1: the positioning convex of push card; 8: enamelled wire; 9: the contact; 10: shell.
Embodiment
Embodiment, to shown in Figure 7, the electromagnetic relay of a kind of simple in structure, strong shock resistance of the present invention comprises base 1, magnetic circuit part, contact portion, push card 7 and shell 10 referring to Fig. 1; The moving spring 2 and the quiet spring 3 of contact portion are contained in respectively on the base 1, are fixed with contact 9 on the moving spring 2 and are provided with moving spring pin, are fixed with contact 9 on the quiet spring 3 and are provided with quiet spring pin; This magnetic circuit partly comprises drum stand, enamelled wire 8, U sections core 5, armature 6 and stage clip 4; The extension 1.1 of this base is configured to twine the drum stand of enamelled wire 8; Enamelled wire 8 is wrapped in outside the extension 1.1 that the drum stand that contains U sections core 5 is a base; One end of armature 6 is fixed on by stage clip 4 on the pole-face of iron core 5 one ends, and the other end clamps with second end of push card 7 as free end and is connected, and first end of push card 7 is connected with the free end of moving spring 2; The free end that should move spring 2 is provided with along its thickness and colludes type structure 2.1 to first of side direction bending; First end of push card 7 is provided with one can collude the degree of lip-rounding structure 7.1 that type structure 2.1 matches with first of moving spring, and the size of opening that is used for being matched with the thickness direction that moves spring in this degree of lip-rounding structure 7.1 is made as greater than the gauge of moving spring less than the bending segment size of colluding the type structure; This first colludes the upper edge place that type structure 2.1 is engaged in this degree of lip-rounding structure 7.1.
Also be provided with along its thickness at the free end of moving spring 2 and collude type structure 2.2 to second of opposite side direction bending.
Free-ended first of moving spring colludes type structure 2.1 towards the direction bending away from second end of push card 7, and free-ended second of described moving spring colludes the direction bending of type structure 2.2 towards second end that points to push card 7.
Free-ended first of moving spring colludes type structure 2.1 and is located at moving spring 2 free-ended middle parts, and free-ended second of moving spring colludes type structure 2.2 and is located at moving spring 2 free-ended both wings.
Second end of push card is provided with two inboards with 7.2, two leg shapes of leg shape structure structure 7.2 of certain amount of deflection by end along extension in end and is respectively equipped with a positioning convex 7.2.1; The free-ended both sides of armature are provided with a groove 6.2 respectively; Free-ended two grooves 6.2 of armature match with the positioning convex 7.2.1 of two leg shape structures of push card respectively; End in two leg shape structures 7.2 of push card is respectively equipped with a pin shape structure 7.3; In drum stand is the extension 1.1 of base, be provided with cavity 1.2, two leg shape structures, the 7.2 terminal pin shape structures 7.3 of push card are engaged in respectively in the cavity 1.2 of drum stand opens with two leg shape structures 7.2 of restriction push card laterally.
One end of this armature 6 is provided with card platform 6.1; The centre of this stage clip 4 is provided with the flexible tongue 4.1 that compresses, and the card platform 6.1 that tongue 4.1 elasticity are pressed on armature of compressing of this stage clip is sentenced an end of armature can be close on the edge of a knife of iron core pole-face.
The electromagnetic relay of a kind of simple in structure, strong shock resistance of the present invention is to be fixing moving spring 2, quiet spring 3 and stage clip 4 of carrier with base 1, is fixed with contact 9 on the moving spring 2 and is provided with moving spring pin, is fixed with the contact on the quiet spring 3 and is provided with quiet spring pin; This base 1 is provided with the extension 1.1 that is used for twining enamelled wire and promptly is equivalent to drum stand, certainly, also can be with the drum stand design on the extension of base, this drum stand also can be an independent structures and being fixed on the base; And the extension 1.1 that moving spring 2, quiet spring 3 and stage clip 4 are mounted to base is that drum stand is on the position of almost parallel; Iron core 5 adopts U type structure, and this U sections core 5 is embedded in the extension 1.1 of base, and the pole-face at iron core 5 two ends is all towards the direction that moving spring 2, quiet spring 3 are installed; Enamelled wire 8 is that the extension 1.1 that directly is wrapped in the base that iron core is housed is on the drum stand; Armature 6 is overlayed on the edge of a knife of iron core 5 one end pole-faces through the stage clip 4 that is fixed in base; The effect of stage clip is to let an end of armature can overlay the edge of a knife to the iron core pole-face; Certainly; Also can not need stage clip, but directly be contained in an end of armature on the base and rely on the edge of a knife of iron core pole-face; The other end of armature 6 is that free end then cooperates with second end of push card 7; First end of push card 7 then matches with moving spring 2; Like this; Can the activity of armature 6 be passed to moving spring 2 through push card 7, the contact between the contact 9 of realizing moving spring 2 and the contact 9 of quiet spring 3 or separate promptly realizes the connection of relay contact and the switching function of branch deenergizing.In order to guarantee that push card 7 can not break away from from the moving spring that is mated 2 and armature 6; The free end of moving spring 2 is provided with along its thickness and colludes type structure 2.1 to first of side direction bending; First end of push card 7 is established degree of lip-rounding structure 7.1; Degree of lip-rounding structure can be a plurality of; But to there be one can be used for colluding type structure 2.1 and match at least with first of moving spring; The size of opening that promptly is used for being matched with the thickness direction of moving spring in this degree of lip-rounding structure 2.1 is made as greater than the gauge of moving spring 2 and less than the bending segment size of colluding type structure 2.1, so just can makes spring free-ended first collude type structure 2.1 and match with push card degree of lip-rounding structure 7.1, makes push card 7 can not collude disengaging the type structure 2.1 from first of the moving spring of cooperation with it.Second end of push card 7 has certain length by end along two leg shape structures 7.2 of in end, extending; Therefore also has certain amount of deflection; Can open laterally under external force, that is to say, in assembling; Can like a cork two leg shape structures 7.2 of push card be opened, 7.2 inboard positioning convex 7.2.1 are encased in free-ended two grooves 6.2 of armature with push card two leg shape structures; End in two leg shape structures 7.2 of push card is respectively equipped with a pin shape structure 7.3; In drum stand, be provided with cavity 1.2; Pin shape structure 7.3 through two leg shape structures of push card are terminal is engaged in respectively in the cavity 1.2 of drum stand; Can limit two leg shape structures 7.2 of push card opens laterally; Two leg shape structures 7.2 of the push card after so just can preventing to assemble receive to open after the fierce impact; The positioning convex 7.2.1 of push card two leg shape structures is broken away from from the groove 6.2 of armature, guaranteed that the positioning convex 7.2.1 of push card two leg shape structures can not break away from from the groove 6.2 of armature, guaranteed that promptly push card 7 can not break away from from the armature 6 that cooperates with it.
To shown in Figure 11, the assembly method of the electromagnetic relay of a kind of simple in structure, strong shock resistance of the present invention comprises referring to Fig. 8:
A. be the extension 1.1 of base with iron core 5 drum stand of packing into, and be to twine enamelled wire 8 on the extension 1.1 of base at the drum stand that iron core is housed;
B. will be connected with the moving spring 2 of contact, the quiet spring 3 that is connected with the contact and stage clip 4 and be respectively charged into base 1;
C. the degree of lip-rounding structure 7.1 of push card first end is inserted in free-ended first of moving spring by approaching direction perpendicular to moving spring thickness and colludes type structure 2.1; Rotate to then first collude type structure 2.1 opposite direction; Make first to collude the upper edge place that type structure 2.1 is engaged in degree of lip-rounding structure 7.1, second colludes the below that type structure 2.2 is engaged in the push card bottom face;
D. install on iron core 5 pole-faces that are positioned at base 1 inner chamber body an end that is provided with hanging platform 6.1 in the armature 6 also temporary fixed;
E. two leg shape structures 7.2 of push card are opened, the structural positioning convex 7.2.1 of two leg shapes is snapped in free-ended two grooves 6.2 of armature;
F. after the hanging platform of armature 6 being pressed into the edge of a knife of iron core 5 pole-faces through stage clip 4, the pin shape structure 7.3 with push card 7 extend in the cavity 1.2 of the drum stand that is made up of base extension 1.1 simultaneously, and two leg shape structures 7.2 of push card can't be opened.
At last, load onto shell 10.
The foregoing description only is used for further specifying the electromagnetic relay of a kind of simple in structure, strong shock resistance of the present invention; But the present invention is not limited to embodiment; Every foundation technical spirit of the present invention all falls in the protection range of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.

Claims (4)

1. the electromagnetic relay of simple in structure a, strong shock resistance comprises base, magnetic circuit part, contact portion and push card; The moving spring and the quiet spring of contact portion are contained on the base respectively; This magnetic circuit partly comprises drum stand, enamelled wire, U sections core and armature; U sections core is contained in the drum stand, and enamelled wire is wrapped in outside the drum stand that contains U sections core; One end of armature leans on the pole-face of iron core one end, and the other end clamps with second end of push card as free end and is connected, and first end of push card is connected with the free end of moving spring; It is characterized in that: the free end of this moving spring is provided with along its thickness and colludes the type structure to first of side direction bending; First end of push card is provided with one can collude the degree of lip-rounding structure that the type structure matches with first of moving spring, and the size of opening that is used for being matched with the thickness direction that moves spring in this degree of lip-rounding structure is made as greater than the gauge of moving spring less than the bending segment size of colluding the type structure; This first colludes the upper edge place of type respective outer side edges in this degree of lip-rounding structure;
The free end of described moving spring also is provided with along its thickness and colludes the type structure to second of opposite side direction bending; Free-ended first of described moving spring colludes the type structure towards the direction bending away from second end of push card, and free-ended second of described moving spring colludes the direction bending of type structure towards second end that points to push card;
Second end of said push card is provided with two leg shape structures with certain amount of deflection by end along in end, extending, and the inboard of two leg shape structures is respectively equipped with a positioning convex; The free-ended both sides of armature are provided with a groove respectively; Free-ended two grooves of armature match with the positioning convex of two leg shape structures of push card respectively; End in two leg shape structures of push card is respectively equipped with a pin shape structure, in drum stand, is provided with cavity, and the terminal pin shape structure of two leg shape structures of push card is engaged in respectively in the cavity of drum stand opens with two leg shape structures of restriction push card laterally;
Also comprise a stage clip, this stage clip is fixed on the base, and an end of said armature leans on the pole-face of iron core one end through stage clip.
2. electromagnetic relay according to claim 1 is characterized in that: free-ended first of described moving spring colludes the type structure and is located at the moving free-ended middle part of spring, and free-ended second of said moving spring colludes the type structure and is located at the moving free-ended both wings of spring.
3. electromagnetic relay according to claim 1 is characterized in that: described drum stand is made up of the extension of base.
4. the assembly method of the electromagnetic relay of simple in structure a, strong shock resistance comprises:
A. with the iron core drum stand of packing into, and twine enamelled wire being equipped with on the drum stand of iron core;
The moving spring that b. will be connected with moving contact is respectively charged into base with the quiet spring that is connected with fixed contact;
C. the degree of lip-rounding structure of push card first end is inserted in free-ended first of moving spring by approaching direction perpendicular to moving spring thickness and colludes the type structure; Rotate to then first collude the type structure opposite direction; Make first to collude the upper edge place of type respective outer side edges in degree of lip-rounding structure, second colludes the type respective outer side edges below the push card bottom face;
D. install on the iron core pole-face that is positioned at the base intracavity body end that is provided with hanging platform in the armature also temporary fixed;
E. two leg shape structures of push card are opened, the structural positioning convex of two leg shapes is snapped in free-ended two grooves of armature;
F. the hanging platform of armature is pressed into the edge of a knife of iron core pole-face through stage clip, the pin shape structure with push card extend in the cavity of the drum stand that is made up of the base extension simultaneously, and two leg shape structures of push card can't be opened.
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CN2472340Y (en) * 2001-04-05 2002-01-16 厦门宏发电声有限公司 Small size and large power sensitive D.C. magnetic delay with super low height
CN1499557A (en) * 2002-11-12 2004-05-26 ŷķ����ʽ���� Electromagnetic relay
CN1677600A (en) * 2004-04-02 2005-10-05 欧姆龙株式会社 Electromagnetic relay
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