CN102208305A - Magnetic circuit structure of polarized relay - Google Patents
Magnetic circuit structure of polarized relay Download PDFInfo
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- CN102208305A CN102208305A CN201110131491XA CN201110131491A CN102208305A CN 102208305 A CN102208305 A CN 102208305A CN 201110131491X A CN201110131491X A CN 201110131491XA CN 201110131491 A CN201110131491 A CN 201110131491A CN 102208305 A CN102208305 A CN 102208305A
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Abstract
The invention discloses a magnetic circuit structure of a polarized relay. The magnetic circuit structure comprises magnetic steel, two yokes, a magnetic shield sheet, an armature and one or two magnetic conducting iron sheets, wherein the two yokes are abreast arranged in parallel; the armature is arranged between the upper parts of the two yokes; the magnetic steel is a thin sheet and positioned between the lower parts of the two yokes; the one or two magnetic conducting iron sheets are inserted in gaps between one side or two sides of the magnetic steel and the yokes, so the magnetic steel is positioned at a bias position or a middle position of a gap between the two yokes; and two surfaces of the inserted magnetic conducting iron sheets are connected with one surface of the magnetic steel and one surface of the corresponding yoke. In the structure, the asymmetric mode of a magnetic circuit is realized by adopting a mode of combining magnetic steel bias and air magnetic leakage of the magnetic circuit; the magnetic circuit structure has the characteristics of simpleness and easiness of realization, and simplification of production process; meanwhile, the magnetic circuit structure is easy to realize; and the symmetric magnetic circuit structure of the conventional asymmetric contact type product is changed into an asymmetric magnetic circuit structure so as to prolong the electric life performance of the product.
Description
Technical field
The present invention relates to a kind of relay, particularly relate to a kind of magnetic structure of polarized relay.
Background technology
Polarized relay is that a kind of state changes the direct current relay that depends on input variable (energizing quantity) polarity.Along with improving constantly of environmental consciousness, polarized relay has obtained increasing application as a kind of energy-saving product.
For polarized relay symmetry or asymmetrical contact form structure, need coupling symmetrical magnetic circuits structure or asymmetric magnetic structure form.
The asymmetric magnetic structure of existing a kind of polarized relay is referring to Fig. 1, shown in Figure 2, this magnetic structure comprise yoke 1 ', antifreeze plate 2 ' and armature part, wherein armature partly comprise a magnet steel 31 ', two blocks of armature be armature 32 ', armature a 33 ' and pushing block 34 '.Two blocks of armature 32 of magnet steel 31 ' be fixed on ', 33 ' the centre, in magnetic circuit, be in the magnetic circuit symmetric position, therefore for the product of its asymmetric contact form, its magnetic bias mode be adopt weld in the intersection of yoke and armature head stainless steel substrates 4 ' mode, stainless steel substrates 4 ' can be welded in yoke 1 ' on, also can be welded in armature 32 ' or armature 33 ' on, the mode of this welding, existing needs to drop into shortcomings such as welding equipment and welding procedure difference.The volume of the magnet steel of this magnetic structure is bigger in addition, the drawback of existence: the one, increased cost, and secondly be to have increased the magnetic circuit magnetic resistance, influence the coil stimulating magnetic circuit efficiency.Simultaneously, because magnet steel 31 ' be to be fixed on the armature, magnet steel 31 ' move with one week of armature causes whole heavy moving parts bigger, so the anti shock and vibration poor-performing.
Existing another kind of polarized relay, no matter the contact structure form of product is symmetry or unsymmetric form, and its magnetic circuit adopts symmetrical structure fully, and this mode realizes on producing easily, good manufacturability.But when product contact form is unsymmetric form, if its magnetic circuit is still symmetrical structure, because the characteristic of magnet steel itself, its magnetic property can descend under certain condition to some extent, product counter-force under the form of asymmetric contact can become clearly to the influence of product at this moment, and therefore the electric life performance to product produces very big adverse effect.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of magnetic structure of polarized relay is provided, it is the asymmetric manner that the mode that adopts magnet steel biasing and magnetic circuit air leakage field to combine realizes magnetic circuit, has easy easy realization, and can simplify the characteristics of production technology, simultaneously, this magnetic structure is realized adopting the symmetrical magnetic circuits structure to adopt asymmetric magnetic structure to improve the electric life performance of product the product of former asymmetric contact form easily instead.
The technical solution adopted for the present invention to solve the technical problems is: a kind of magnetic structure of polarized relay comprises that magnet steel, yoke, antifreeze plate and outer cover are equipped with the armature of coil; Yoke is two, is parallel and is arranged side by side; One end of armature is installed in rotation on by antifreeze plate between the end on two yoke tops, and the other end of armature is located between the other end on two yoke tops swingably; Magnet steel is a chip shape; This magnet steel is between the bottom of two yokes;
This magnetic structure also comprises a slice or two magnetic conductive iron sheets, and a slice or two magnetic conductive iron sheets are inserted in the magnet steel and the gap between the yoke of magnet steel one or both sides, make magnet steel be in the offset position or the centre position in two gaps between the yoke; The two sides of the magnetic conductive iron sheet of plug-in mounting joins with the one side of magnet steel and the one side of corresponding yoke respectively.
The U type that is shaped as of described yoke; Two U type yokes are parallel and are arranged side by side; One end of armature is installed in rotation between the termination portion of two yokes by antifreeze plate, and the other end of armature is located between the other end head of two yokes swingably.
Described magnetic conductive iron sheet is a slice, and this sheet magnetic conductive iron sheet is inserted in the magnet steel and the gap between the yoke of magnet steel one side, makes magnet steel be in the offset position in two gaps between the yoke; The one side of this magnetic conductive iron sheet is joined with the one side of a slice yoke wherein, and the another side of magnetic conductive iron sheet and the one side of magnet steel are joined, and the another side of magnet steel joins with the one side of another sheet yoke wherein.
The length dimension of described magnetic conductive iron sheet is more than or equal to the length dimension of described magnet steel.
Described magnetic conductive iron sheet is a slice, and this sheet magnetic conductive iron sheet is inserted in the magnet steel and the gap between the yoke of magnet steel one side, makes magnet steel be in the offset position in two gaps between the yoke; The one side of this magnetic conductive iron sheet is provided with some protruding buds, and the protruding bud of this magnetic conductive iron sheet joins with the one side of a slice yoke wherein, and the another side of magnetic conductive iron sheet and the one side of magnet steel are joined, the another side of magnet steel and wherein the one side of another sheet yoke join.
The length dimension of magnetic conductive iron sheet that contains protruding bud is more than or equal to the length dimension of described magnet steel.
Described magnetic conductive iron sheet is two, and the thickness of two magnetic conductive iron sheets is consistent, and two magnetic conductive iron sheets are inserted into respectively in the magnet steel and the gap between the yoke of magnet steel both sides, make magnet steel be in the centre position in two gaps between the yoke; Wherein the one side of a slice magnetic conductive iron sheet is joined with the one side of a slice yoke wherein, the another side of this sheet magnetic conductive iron sheet and the one side of magnet steel are joined, the another side of magnet steel joins with the one side of another sheet magnetic conductive iron sheet wherein, and the another side of this another sheet magnetic conductive iron sheet joins with the one side of another sheet yoke wherein.
The shape of two magnetic conductive iron sheets, big or small identical; The length dimension of magnetic conductive iron sheet is more than or equal to the length dimension of described magnet steel.
The magnetic structure of a kind of polarized relay of the present invention, magnet steel adopt chip shape, mode that can be by the magnet steel location bias and utilize magnetic conductive iron sheet to form the purpose that certain magnetic circuit air gap leakage field reaches asymmetric magnetic structure.Magnet steel is a flake structure, can reduce its volume, reduces cost, and reduces the magnetic resistance of magnetic circuit, has improved the coil stimulating magnetic circuit efficiency.The magnetic conductive iron sheet size is longer than magnet steel, forms certain biasing leakage field, strengthens the degree of asymmetry of magnetic circuit.
The magnetic structure magnetic structure of a kind of polarized relay of the present invention constitutes the bridge-type magnetic circuit by two yokes, magnet steel, magnetic conductive iron sheet, armature.Two non-working-gaps of bridge-type magnetic circuit are equipped with antifreeze plate, form duplex and make the gap magnetic circuit.Armature is the action part of magnetic circuit, and its rotation axis is in the non-working-gap side, because magnet steel is on armature, the lighter weight of armature assembly can improve the anti shock and vibration performance.
The invention has the beneficial effects as follows that owing to adopted magnet steel, yoke, antifreeze plate, outer cover that the magnetic structure that the armature of coil and a slice or two magnetic conductive iron sheets constitute polarized relay is housed, yoke is two, shape U type; Two yokes are parallel and are arranged side by side; Armature is arranged in the gap between the top of two yokes, and the two ends of armature are in respectively between the U type head of respective side of two yokes, between the U type head of a wherein end of armature and this respective side of two yokes antifreeze plate are housed; Plug-in mounting magnet steel and a slice or two magnetic conductive iron sheets side by side in the gap between at the bottom of the U of the two yokes type, regulate the position of magnet steel by a slice or two magnetic conductive iron sheets, make magnet steel be in the offset position or the centre position in two gaps between the yoke, realize of the conversion of asymmetric magnetic structure easily, or the symmetrical magnetic circuits structure is to the conversion of asymmetric magnetic structure to the symmetrical magnetic circuits structure.The mode that this employing magnet steel biasing and magnetic circuit air leakage field combine realizes the asymmetric manner of magnetic circuit, has easy easy realization, and can simplify the characteristics of production technology, simultaneously, this magnetic structure is realized adopting the symmetrical magnetic circuits structure to adopt asymmetric magnetic structure to improve the electric life performance of product the product of former asymmetric contact form easily instead.
Below in conjunction with drawings and Examples the present invention is described in further detail; But the magnetic structure magnetic structure of a kind of polarized relay of the present invention is not limited to embodiment.
Description of drawings
Fig. 1 is a kind of polarized relay magnetic structure schematic diagram of prior art;
Fig. 2 is a kind of polarized relay magnetic structure decomposing schematic representation of prior art;
Fig. 3 is embodiment one structural representation of the present invention;
Fig. 4 is embodiment one a STRUCTURE DECOMPOSITION schematic diagram of the present invention;
Fig. 5 is embodiment one structure of the present invention (reverses direction) schematic diagram;
Fig. 6 is the organigram of embodiment one polarized relay of the present invention;
Fig. 7 is embodiment two structural representations of the present invention;
Fig. 8 is embodiment three structural representations of the present invention;
Fig. 9 is that magnetic structure of the present invention is analyzed schematic diagram one;
Figure 10 is that magnetic structure of the present invention is analyzed schematic diagram two;
Figure 11 is that magnetic structure of the present invention is analyzed schematic diagram three.
Embodiment
Embodiment one, and to shown in Figure 5, the magnetic structure of a kind of polarized relay of the present invention comprises that magnet steel 1, yoke, antifreeze plate 4 and outer cover are equipped with the armature 2 of coil referring to Fig. 3; Yoke is two, i.e. yoke 51 and yoke 52, and yoke 51, yoke 52 are parallel and are arranged side by side; One end of armature 2 is installed in rotation between the end that two yokes are yoke 51, yoke 52 tops by antifreeze plate 4, and the other end of armature 2 is located between the other end that two yokes are yoke 51, yoke 52 tops swingably; Magnet steel 1 is a chip shape; This magnet steel 1 is between the bottom of yoke 51, yoke 52 at two yokes;
This magnetic structure also comprises a slice magnetic conductive iron sheet 3, and this sheet magnetic conductive iron sheet 3 is inserted in the magnet steel 1 and the gap between the yoke 51 of magnet steel 1 one sides, makes magnet steel 1 be in the offset position that two yokes are the gap between yoke 51, the yoke 52, promptly relies on yoke 52; The one side of this magnetic conductive iron sheet 3 is joined with the one side of a slice yoke 51 wherein, and the one side of the another side of magnetic conductive iron sheet 3 and magnet steel 1 is joined, and the another side of magnet steel 1 joins with the one side of another sheet yoke 52 wherein.
Wherein,
The shape of described yoke 51, yoke 52 is the U type; Two U type yokes are that yoke 51, yoke 52 are parallel and are arranged side by side; One end of armature 2 is installed in rotation between the termination portion that two yokes are yoke 51, yoke 52 by antifreeze plate 4, and the other end of armature 2 is located between the other end head that two yokes are yoke 51, yoke 52 swingably.
The length dimension of described magnetic conductive iron sheet 3 is greater than the length dimension of described magnet steel 1.
The magnetic structure of a kind of polarized relay of the present invention is a kind of asymmetric magnetic structure, is applicable to asymmetric contact structure form.Magnet steel 1 is contained near yoke 52 1 sides, and the air gap of 51 of the yokes magnetic conductive iron sheet 3 of packing into.The length of magnetic conductive iron sheet 3 is longer than magnet steel 1, and 52 of yokes still exist certain air gap to produce leakage field.Because the influence of magnetic circuit leakage field, when armature 2 heads were fitted on yoke 51 pole-faces, the magnet steel suction that armature 2 is subjected to was littler than the suction that armature produces on yoke 52, thereby reached the asymmetrical purpose of magnetic circuit.
The magnetic structure of a kind of polarized relay of the present invention, magnet steel 1 adopts chip shape, mode that can be by magnet steel 1 location bias and utilize magnetic conductive iron sheet 3 to form the purpose that certain magnetic circuit air gap leakage field reaches asymmetric magnetic structure.Magnet steel 1 is a flake structure, can reduce its volume, reduces cost, and reduces the magnetic resistance of magnetic circuit, has improved the coil stimulating magnetic circuit efficiency.Magnetic conductive iron sheet 3 sizes are longer than magnet steel 1, form certain biasing leakage field, strengthen the degree of asymmetry of magnetic circuit.
The magnetic structure magnetic structure of a kind of polarized relay of the present invention is that yoke 51 and yoke 52, magnet steel 1, magnetic conductive iron sheet 3, armature 2 constitute the bridge-type magnetic circuit by two yokes.Two non-working-gaps of bridge-type magnetic circuit are equipped with antifreeze plate 4, form duplex and make the gap magnetic circuit.Armature 2 is the action part of magnetic circuit, and its rotation axis is in the non-working-gap side, because magnet steel 1 is on armature 2, the lighter weight of armature assembly can improve the anti shock and vibration performance.
Referring to shown in Figure 6, a kind of polarized relay of the present invention comprises base assembly, coil block and shell 33 compositions.Magnet steel 1, yoke 51, yoke 52, magnetic conduction sheet 3 are installed on the base portion 30, antifreeze plate 4, armature 2, push card 34, bobbin 32 are formed coiler part 35, coiler part is fixed on the base portion, coiler part with electrically contact the part isolate by framework 31.By coil leading foot 351 and 352 is applied opposite polarity excitation, relay is moved and involution.
Embodiment two, referring to shown in Figure 7, the magnetic structure of a kind of polarized relay of the present invention, be with the difference of embodiment one, the one side of this magnetic conductive iron sheet 3 is provided with some protruding luxuriant 301, protruding luxuriant 301 of this magnetic conductive iron sheet joins with the one side of a slice yoke 51 wherein, and the one side of the another side of magnetic conductive iron sheet 3 and magnet steel 1 is joined, the another side of magnet steel 1 and wherein the one side of another sheet yoke 52 join.
Present embodiment is the more obvious magnetic structure of another kind of asymmetric effect, magnet steel 1 is a yoke 52 near the opposite side yoke, one side yoke is that yoke 51 remains with certain air gap with magnetic conductive iron sheet 3, for guaranteeing that magnet steel 1 is tight with yoke 52 applyings, can be little by protruding luxuriant 301 two of magnetic conductive iron sheet upper punches.
Embodiment three, referring to shown in Figure 8, the magnetic structure of a kind of polarized relay of the present invention, be with the difference of embodiment one, described magnetic conductive iron sheet 3 is two, the thickness of two magnetic conductive iron sheets 3 is consistent, and two magnetic conductive iron sheets 3 are inserted into respectively in the magnet steel 1 and the gap between the yoke of magnet steel 1 both sides, make magnet steel 1 be in the centre position that two yokes are the gap between yoke 51, the yoke 52; Wherein the one side of a slice magnetic conductive iron sheet 3 is joined with the one side of a slice yoke 51 wherein, the one side of the another side of this sheet magnetic conductive iron sheet 3 and magnet steel 1 is joined, the another side of magnet steel 1 joins with the one side of another sheet magnetic conductive iron sheet 3 wherein, and the another side of this another sheet magnetic conductive iron sheet 3 joins with the one side of another sheet yoke 52 wherein.
The shape of two magnetic conductive iron sheets 3, big or small identical; The length dimension of magnetic conductive iron sheet 3 is greater than the length dimension of described magnet steel.
The magnet steel 1 that the present invention adopts be a flake structure, can reduce its volume, reduces cost, and reduces the magnetic resistance of magnet steel 1 own simultaneously, has improved the coil stimulating magnetic circuit efficiency.In addition because magnet steel is thin, and the space between two yokes is relatively large, the leakage field that helps utilizing this air gap to produce is realized the symmetry and the bias state of magnetic circuit.
The present invention adopts magnetic conductive iron sheet 3 to strengthen the effect of magnetic circuit biasing by the offset of magnet steel 1 between two yokes (being yoke 51, the yoke 52) magnetic circuit of setovering simultaneously, changes the degree of biasing by magnetic conduction sheet 3 length.As shown in Figure 9, magnetic conduction sheet 3 length are identical with magnet steel 1 length, and the leakage field that this moment, magnet steel 1 produced is less relatively, and the magnetic circuit biasing mainly is that the biasing by the magnet steel position realizes that the biasing effect is relatively poor.The magnetic circuit magnetic line of force distributes as shown in figure 10 after the length of lengthening magnetic conduction sheet 3, this moment is because magnet steel 1 is thin, the slit is little between magnetic conduction sheet 3 and the yoke 52, thereby can produce a large amount of leakage fields herein, because this leakage field is partial to yoke 52 1 sides, thereby play the biasing purpose, and the biasing effect is than simple good by magnet steel 1 biasing.If magnet steel 1 mediates, and magnetic conductive iron sheet 3 is respectively in magnet steel 1 both sides, no matter then magnetic conductive iron sheet 3 is longer or equal than magnet steel, magnetic circuit all is in symmetry status, as shown in figure 11.
The foregoing description only is used for further specifying the magnetic structure of a kind of polarized relay 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 solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (8)
1. the magnetic structure of a polarized relay comprises that magnet steel, yoke, antifreeze plate and outer cover are equipped with the armature of coil; Yoke is two, is parallel and is arranged side by side; One end of armature is installed in rotation on by antifreeze plate between the end on two yoke tops, and the other end of armature is located between the other end on two yoke tops swingably; It is characterized in that: magnet steel is a chip shape; This magnet steel is between the bottom of two yokes;
This magnetic structure also comprises a slice or two magnetic conductive iron sheets, and a slice or two magnetic conductive iron sheets are inserted in the magnet steel and the gap between the yoke of magnet steel one or both sides, make magnet steel be in the offset position or the centre position in two gaps between the yoke; The two sides of the magnetic conductive iron sheet of plug-in mounting joins with the one side of magnet steel and the one side of corresponding yoke respectively.
2. the magnetic structure of polarized relay according to claim 1 is characterized in that: the U type that is shaped as of described yoke; Two U type yokes are parallel and are arranged side by side; One end of armature is installed in rotation between the termination portion of two yokes by antifreeze plate, and the other end of armature is located between the other end head of two yokes swingably.
3. the magnetic structure of polarized relay according to claim 1 and 2, it is characterized in that: described magnetic conductive iron sheet is a slice, this sheet magnetic conductive iron sheet is inserted in the magnet steel and the gap between the yoke of magnet steel one side, makes magnet steel be in the offset position in two gaps between the yoke; The one side of this magnetic conductive iron sheet is joined with the one side of a slice yoke wherein, and the another side of magnetic conductive iron sheet and the one side of magnet steel are joined, and the another side of magnet steel joins with the one side of another sheet yoke wherein.
4. the magnetic structure of polarized relay according to claim 3, it is characterized in that: the length dimension of described magnetic conductive iron sheet is more than or equal to the length dimension of described magnet steel.
5. the magnetic structure of polarized relay according to claim 1 and 2, it is characterized in that: described magnetic conductive iron sheet is a slice, this sheet magnetic conductive iron sheet is inserted in the magnet steel and the gap between the yoke of magnet steel one side, makes magnet steel be in the offset position in two gaps between the yoke; The one side of this magnetic conductive iron sheet is provided with some protruding buds, and the protruding bud of this magnetic conductive iron sheet joins with the one side of a slice yoke wherein, and the another side of magnetic conductive iron sheet and the one side of magnet steel are joined, the another side of magnet steel and wherein the one side of another sheet yoke join.
6. the magnetic structure of polarized relay according to claim 5, it is characterized in that: the length dimension of described magnetic conductive iron sheet is more than or equal to the length dimension of described magnet steel.
7. the magnetic structure of polarized relay according to claim 1 and 2, it is characterized in that: described magnetic conductive iron sheet is two, the thickness of two magnetic conductive iron sheets is consistent, two magnetic conductive iron sheets are inserted into respectively in the magnet steel and the gap between the yoke of magnet steel both sides, make magnet steel be in the centre position in two gaps between the yoke; Wherein the one side of a slice magnetic conductive iron sheet is joined with the one side of a slice yoke wherein, the another side of this sheet magnetic conductive iron sheet and the one side of magnet steel are joined, the another side of magnet steel joins with the one side of another sheet magnetic conductive iron sheet wherein, and the another side of this another sheet magnetic conductive iron sheet joins with the one side of another sheet yoke wherein.
8. the magnetic structure of polarized relay according to claim 7 is characterized in that: the shape of two magnetic conductive iron sheets, big or small identical; The length dimension of magnetic conductive iron sheet is more than or equal to the length dimension of described magnet steel.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110131491.XA CN102208305B (en) | 2011-05-19 | 2011-05-19 | Magnetic circuit structure of polarized relay |
| DE112012002161.4T DE112012002161B4 (en) | 2011-05-19 | 2012-05-16 | Magnet system of a polarized relay |
| PCT/CN2012/075546 WO2012155829A1 (en) | 2011-05-19 | 2012-05-16 | Magnetic circuit structure of polarized relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110131491.XA CN102208305B (en) | 2011-05-19 | 2011-05-19 | Magnetic circuit structure of polarized relay |
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| CN102208305A true CN102208305A (en) | 2011-10-05 |
| CN102208305B CN102208305B (en) | 2014-02-19 |
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| CN201110131491.XA Active CN102208305B (en) | 2011-05-19 | 2011-05-19 | Magnetic circuit structure of polarized relay |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155829A1 (en) * | 2011-05-19 | 2012-11-22 | 厦门宏发电声股份有限公司 | Magnetic circuit structure of polarized relay |
| CN105448602A (en) * | 2016-01-12 | 2016-03-30 | 宁波天波港联电子有限公司 | Magnetic latching relay |
| CN105513901A (en) * | 2016-01-12 | 2016-04-20 | 宁波天波港联电子有限公司 | Magnetic latching relay |
| CN106908636A (en) * | 2017-01-23 | 2017-06-30 | 宁波中车时代传感技术有限公司 | A kind of novel magnetic circuit |
| CN107706052A (en) * | 2017-10-23 | 2018-02-16 | 三友联众集团股份有限公司 | A kind of iron core swing type relay |
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| CN202094053U (en) * | 2011-05-19 | 2011-12-28 | 厦门宏发电声股份有限公司 | Magnetic structure of electropolarized relay |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155829A1 (en) * | 2011-05-19 | 2012-11-22 | 厦门宏发电声股份有限公司 | Magnetic circuit structure of polarized relay |
| CN105448602A (en) * | 2016-01-12 | 2016-03-30 | 宁波天波港联电子有限公司 | Magnetic latching relay |
| CN105513901A (en) * | 2016-01-12 | 2016-04-20 | 宁波天波港联电子有限公司 | Magnetic latching relay |
| CN106908636A (en) * | 2017-01-23 | 2017-06-30 | 宁波中车时代传感技术有限公司 | A kind of novel magnetic circuit |
| CN106908636B (en) * | 2017-01-23 | 2019-10-15 | 宁波中车时代传感技术有限公司 | A kind of magnetic structure |
| CN107706052A (en) * | 2017-10-23 | 2018-02-16 | 三友联众集团股份有限公司 | A kind of iron core swing type relay |
| CN107706052B (en) * | 2017-10-23 | 2021-03-30 | 三友联众集团股份有限公司 | Iron core oscillating relay |
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| CN102208305B (en) | 2014-02-19 |
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