CN103426690A - Magnetic latching relay with parallel magnetic circuit - Google Patents
Magnetic latching relay with parallel magnetic circuit Download PDFInfo
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- CN103426690A CN103426690A CN2013103536868A CN201310353686A CN103426690A CN 103426690 A CN103426690 A CN 103426690A CN 2013103536868 A CN2013103536868 A CN 2013103536868A CN 201310353686 A CN201310353686 A CN 201310353686A CN 103426690 A CN103426690 A CN 103426690A
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Abstract
The invention discloses a magnetic latching relay with a parallel magnetic circuit. The magnetic latching relay comprises a magnetic circuit portion, the magnetic circuit portion comprises an iron core, an armature, a yoke, magnetic steel, a magnetic conduction part and a coil, the L-shaped yoke comprises a first yoke and a second yoke, the first yoke is parallel to the iron core, the second yoke is perpendicular to the iron core, the iron core penetrates the coil, the upper end of the iron core is provided with a pole piece, the lower end of the iron core is fixed to the second yoke, the armature is mounted at the edge of the yoke, one end of the magnetic conduction part is connected with the first yoke, the other end of the magnetic conduction part is connected with the first yoke through the magnetic steel, a magnetic shield groove for increasing the magnetic resistance of a magnetic loop is formed in the first yoke between the joint of the first yoke and the magnetic steel and the joint of the first yoke and the magnetic conduction part, a cut section is formed on one side of the pole piece, and the size of the cut section is matched with that of the magnetic shield groove to adjust action of the relay and mutual balance of reset voltage parameters. The cut section of the iron core is matched with the magnetic shield groove, so that reset voltage values and set voltage values of the magnetic latching relay can be as balanced as possible.
Description
Technical field
The present invention relates to a kind of relay, particularly relate to a kind of magnetic latching relay of parallel connection type magnetic circuit.
Background technology
Relay is the automatic switch element with isolation features, is widely used in the fields such as communication, automobile, control automatically, household electrical appliance, is one of most important control element.
Along with the needs of energy-conserving and environment-protective, the range of application of magnetic latching relay is more and more wider, and increasing general-purpose relay need to be expanded out magnetic and keep specification.Typical clapper type relay will realize that magnetic keeps, and generally iron core (or yoke) is divided into to two parts, seals in a permanent magnet in centre, forms the tandem type magnetic circuit.After coil stimulating, the magnetic circuit closure, the magnetic force that permanent magnet produces can make armature be kept closed.A kind of magnetic that Fig. 1 is prior art keeps the structural representation of electromagnetic relay magnetic circuit, as shown in Figure 1, the magnetic circuit part of this electromagnetic relay comprises that this reed of reed 101(can be also the part of relay output loop), armature 102, yoke 103, iron core 104, coil 105, magnet steel 106; Iron core 104 is through coil 105, and magnet steel 106 is fixed between iron core 104 and yoke 103, and armature 102 is fitted together with reed 101 riveting in advance, and then riveting is contained on yoke 103.The permanent magnet circuit that magnet steel 106 produces, from the N utmost point of magnet steel, through iron core 104, air gap, armature 102, yoke 103, arrives the S utmost point of magnet steel.The magnetic field that coil 105 excitation produces is through the S-N of iron core 104, air gap, armature 102, yoke 103 and magnet steel, and when permanent magnetic field, with coil magnetic field in the same way the time, both overcome the counter-force of reed 101 after merging, make armature 102 and iron core 104 adhesives.After coil 105 stops excitation, coil magnetic field disappears, and permanent magnetic field provides confining force to make armature 102 and iron core 104 keep attracting state.After the logical reverse current of coil, coil 105 produces magnetic field by iron core 104, the N-S of magnet steel, yoke 103, armature 102, and magnetic field and permanent magnetic field that coil produces are reverse, have weakened permanent magnetic, under " working in coordination with " effect of reed 101 counter-forces, reed 101 band moving armatures 102 return simultaneously.
There is following drawback in this tandem type magnetic circuit:
1, because permanent magnetic is always inhaled armature to iron core, although the counter-force of reed itself is quite large, the contact force of the normal-closed end of product is less, a little less than causing quiet load capacity of closing end, and the anti shock and vibration poor performance of relay product simultaneously;
2, after coil applies the involution excitation, the magnetic force of permanent magnet still has stronger suction to armature, need very large recuperability just can make the armature involution to release condition, under magnetic force and recuperability are mated improperly situation, the set voltage that coil may occur is very little, resetting voltage is very large, the situation that even can't reset.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art, a kind of magnetic latching relay of parallel connection type magnetic circuit is provided, by magnet isolation tank being set on yoke and on the pole shoe of iron core, section being set, reach regulate iron core in armature set position the purpose to the size of the confining force of armature, thereby can make numerically balance as far as possible of the involution voltage of magnetic latching relay and set voltage.
The technical solution adopted for the present invention to solve the technical problems is: a kind of magnetic latching relay of parallel connection type magnetic circuit comprises magnetic circuit part; Described magnetic circuit part comprises iron core, armature, yoke, magnet steel, magnetic conductive part and coil; Described yoke is L-type, by the first yoke that is parallel to iron core with perpendicular to the second yoke of iron core, forms; Described iron core is through coil, and the upper end of iron core is provided with pole shoe, and the lower end of iron core and the second yoke fix; Armature is arranged on the knife-edge part of yoke; One end of magnetic conductive part is connected with the first yoke, and the other end of magnetic conductive part is connected with the first yoke by magnet steel; Be provided with the magnet isolation tank of using for increasing the magnetic loop magnetic resistance on the first yoke between two joints of the first yoke and magnet steel, the first yoke and magnetic conductive part, with the size of utilizing magnet isolation tank, come the action of regulating relay, the mutual balance of involution voltage parameter; One side of described pole shoe is provided with section, with the size of utilizing section, coordinates magnet isolation tank, the mutual balance of the action of regulating relay, involution voltage parameter.
The section of described pole shoe is for to cut a part along the axisymmetric complete circle of core center.
The section of described pole shoe is for to cut a part along the axisymmetric complete rectangle of core center.
One end of described magnetic conductive part is provided with and the contacted contact-making surface of the first yoke.
The contact-making surface of described magnetic conductive part is provided with for the boss with the first yoke location use, and the first yoke is provided with the hole of matching with the magnetic conduction sheet boss; The boss of magnetic conduction sheet is engaged in the hole of the first yoke, and is fixed together by riveted joint or welding manner.
The other end of described magnet steel and magnetic conductive part fixes, and the other end of magnetic conductive part is provided with for the fixing protruding bud of magnet steel.
The section of described pole shoe is located at the direction matched towards dynamic and static contact, in order to increase the creepage distance between iron core and static contact spring piece.
The invention has the beneficial effects as follows:
By be provided with the magnet isolation tank of using for increasing the magnetic loop magnetic resistance on the first yoke, and the pole shoe of iron core is clipped to a part, utilize the size of section (clipping a part) to coordinate magnet isolation tank, the mutual balance of the action of regulating relay, involution voltage parameter; The size of utilizing the magnet isolation tank of yoke is action that can regulating relay, the mutual balance of involution voltage parameter, but, because magnet isolation tank can not unrestrictedly increase, the magnetic conduction sectional area that is place, magnet isolation tank both sides can not unrestrictedly reduce, therefore, just can't accomplish action, the involution voltage parameter of any regulating relay; And that magnetic latching relay is generally wished on involution voltage and operation voltage numerical value is more approaching better, in order further to improve the numerical value of involution voltage, the iron core pole-shoe face part of pruning is formed to section, according to the magnetic circuit principle, the area of iron core pole shoe is less, its in armature set position, the confining force (magnetic attraction) to armature is larger, make the required involution voltage of its involution also larger, thereby can make numerically balance (be on numerical values recited approach) as far as possible of involution voltage and set voltage as far as possible.
Below in conjunction with drawings and Examples, the present invention is described in further detail; But the magnetic latching relay of a kind of parallel connection type magnetic circuit of the present invention is not limited to embodiment.
The accompanying drawing explanation
Fig. 1 is the structural representation that a kind of magnetic of prior art keeps the electromagnetic relay magnetic circuit;
Fig. 2 is structure decomposing schematic representation of the present invention;
Fig. 3 is the structural representation of magnetic circuit part of the present invention;
Fig. 4 is the structural representation of the yoke of magnetic circuit part of the present invention;
Fig. 5 is the structural representation of the yoke (clipping a part) of magnetic circuit part of the present invention;
Fig. 6 is the structural representation of the magnetic conductive part of magnetic circuit part of the present invention;
Fig. 7 is the end view of the magnetic conductive part of magnetic circuit part of the present invention;
Fig. 8 is the structural representation of the iron core of magnetic circuit part of the present invention;
Fig. 9 is the vertical view of the iron core of magnetic circuit part of the present invention;
Figure 10 is the magnetic circuit schematic diagram of magnetic circuit part of the present invention (when reset mode, no power);
Figure 11 is the magnetic circuit schematic diagram of magnetic circuit part of the present invention (when reset mode, logical set voltage);
Figure 12 is the magnetic circuit schematic diagram of magnetic circuit part of the present invention (when SM set mode, no power);
Figure 13 is the magnetic circuit schematic diagram of magnetic circuit part of the present invention (when SM set mode, logical resetting voltage).
Embodiment
Embodiment, referring to shown in Fig. 2 to Fig. 9, the magnetic latching relay of a kind of parallel connection type magnetic circuit of the present invention, comprise magnetic circuit part 1, moving spring part 2, quiet spring part 3 and base 4; Described magnetic circuit part 1 comprises iron core 11, armature 12, yoke 13, magnet steel 14, magnetic conductive part 15, coil (not shown) and bobbin 16; Described moving spring part 2 comprises movable contact spring 21 and moving contact 22; Described quiet spring part 3 comprises static contact spring piece 31 and fixed contact 32; Described yoke 13 is L-type, by the first yoke 131 that is parallel to iron core with perpendicular to the second yoke 132 of iron core, forms; Coil winding is on bobbin 16, and described iron core 11 is through coil (passing the hole of bobbin 16), and the upper end of iron core 11 is provided with pole shoe 111, and the lower end of iron core 11 and the second yoke 132 fix; Armature 12 is connected by movable contact spring with yoke 13; Movable contact spring 21 is provided with bending part, one side of the bending part of movable contact spring and armature 12 fix and are engaged in the top of the pole shoe 111 of iron core, moving contact 22 is fixed on the termination on one side of the bending part of described movable contact spring 21, the another side of the bending part of movable contact spring and the first yoke 131 fix, and make armature 12 be arranged on the knife-edge part of yoke; One end of magnetic conductive part 15 is connected with the first yoke 131, and the other end of magnetic conductive part 15 is connected with the first yoke 131 by magnet steel 14; Be provided with the magnet isolation tank 133 of using for increasing the magnetic loop magnetic resistance between two joints of the first yoke 131 and magnet steel 14, the first yoke 131 and magnetic conductive part 15, with the size of utilizing magnet isolation tank 133, come the action of regulating relay, the mutual balance of involution voltage parameter; One side of described pole shoe 111 is provided with section 112, with the size of utilizing section 112, coordinates magnet isolation tank, the mutual balance of the action of regulating relay, involution voltage parameter.
In the present embodiment, the section 112 of described pole shoe 111 is for to cut a part (as shown in Figure 9) along the axisymmetric complete circle of core center.Certainly, can be also another kind of scheme, the section of described pole shoe is for to cut a part along the axisymmetric complete rectangle of core center.
One end of described magnetic conductive part 15 is provided with and the contacted contact-making surface 151 of the first yoke 131.
The contact-making surface 151 of described magnetic conductive part is provided with for boss 152, the first yokes 131 with the first yoke location use and is provided with the hole 1311 of matching with the magnetic conduction sheet boss; The boss 152 of magnetic conduction sheet is engaged in the hole 1311 of the first yoke, and is fixed together by riveted joint or welding manner.
Described magnet steel 14 fixes with the other end of magnetic conductive part 15, and the other end of magnetic conductive part is provided with for protruding luxuriant 153 of fixing magnet steel.
The section 112 of described pole shoe 111 is located at the direction (as shown in Figure 2) matched towards dynamic and static contact, like this, can increase the creepage distance between iron core and static contact spring piece.
Figure 10 to Figure 13 is respectively that relay is at no power, logical set voltage, the magnetic circuit schematic diagram of relay during logical resetting voltage, Φ m1, Φ m2 is that the magnetic flux that magnet steel 14 self produces (is called permanent magnet flux, during general reference, with Φ m, mean), the path of its process is called the first magnetic circuit A1 and the second magnetic circuit A2, Φ c1, Φ c2 is that the magnetic flux that coil current produces (is called the control magnetic flux, during general reference, with Φ c, mean), the path of its process is called the 3rd magnetic circuit A3, wherein, Φ c1 is the magnetic flux that coil current (set voltage) produces, Φ c2 is the magnetic flux that coil current (resetting voltage) produces, δ 2 is working gas gap, F2 is the electromagnetic attraction (meaning with F during general reference) that air gap delta 2 place's armature are subject to, this magnetic structure has two stable states, be that armature 12 is in set or involution position.
When armature 12, in the involution state shown in Figure 10, (armature 12 is in an open position, coil is not energising also) time, due to the effect of magnetic conductive part 15 with magnet isolation tank 133, now, the path of the magnetic flux process that magnet steel 14 self produces is the first magnetic circuit A1 and the second magnetic circuit A2 as shown in the figure, magnetic flux is respectively Φ m1, Φ m2, both are in parallel, on the second magnetic circuit A2, due to the impact that has air gap delta 2, the effect of Φ m2 is very faint, so the time armature 12 because the electromagnetic attraction F2 that Φ m2 effect is subject to is very faint, be less than the counter-force F1 of moving 21 pairs of armature 12 of spring, be F1 > F2, therefore under the effect of moving spring 21 counter-forces, armature 12 can stably remain on involution position (open position).Due to the effect of magnetic conductive part 15 with magnet isolation tank 133, the magnetic flux that magnet steel 14 is produced divides for Φ m1 and Φ m2 two-way, and the size of Φ m1 and Φ m2 all can be regulated, thereby having solved tandem type magnetic circuit magnet steel magnetic flux only has a road to regulate, still armature had to larger suction and cause the contact force of normal-closed end of product less at involution position magnet steel, a little less than quiet load capacity of closing end, and the shortcoming of the anti shock and vibration poor performance of relay normal-closed end contact.
As shown in figure 11, when giving the set pulse voltage of an one fixed width of relay coil, the direction of the control magnetic flux Φ C1 that relay coil produces is as shown in the 3rd magnetic circuit A3 of Figure 11, the magnetic flux Φ m2 direction consistent (as the second magnetic circuit A2 of Figure 11) that the magnetic flux Φ C1 that now coil produces itself produces with magnet steel 14, and the magnetic flow at air gap delta 2 places is increased, so the time armature 12 electromagnetic attraction F2 that is subject to due to the magnetic flow effect of Φ C1 and Φ m2 become large, when the electromagnetic attraction F2 be subject to when armature 12 is greater than the counter-force F1 of moving 21 pairs of armature 12 of spring, armature 12 is just under the force action of F2 and F1, complete the course of action of armature 12 from the involution position to the set position, then after removing the coil working electric current, the electromagnetic attraction F2 produced by the magnetic flux Φ m2 of magnet steel 14 self is greater than the counter-force F1 of moving 21 pairs of armature 12 of spring, and armature 12 is stably remained on to set position (as shown in figure 12).
When relay during in the set position shown in Figure 12, while to relay coil, applying the reverse involution pulse voltage of an one fixed width, the direction of the control magnetic flux Φ C2 that relay coil produces as shown in figure 13, magnetic flux Φ m2 opposite direction (the second magnetic circuit A2 as shown in figure 13 that the magnetic flux Φ C2 that now coil produces and magnet steel 14 itself produce, the 3rd magnetic circuit A3), thereby the magnetic flux Φ m2 that magnet steel 14 itself is produced is offset, so the time armature 12 because the electromagnetic attraction F2 that Φ m2 and Φ C2 effect are subject to diminishes, when the electromagnetic attraction F2 be subject to when armature 12 is less than the counter-force F1 of moving 21 pairs of armature 12 of spring, armature 12 is just under the force action of F2 and F1, complete the course of action of armature 12 from the set position to the involution position, get back to involution position as shown in figure 10.
Figure 12 shows that armature in the set position and the magnetic circuit magnetic flux state during coil no power, the magnetic flux of magnet steel 14 self is divided into Φ m1, Φ m2 two-way, and the total magnetic flux of magnet steel 14 (Φ m is total)=Φ m1+ Φ m2, by the size of magnet isolation tank 133 is set, the magnetic conduction sectional area 1331(at different yoke magnet isolation tanks 133 places, both sides can be set as shown in Figure 5), thereby the first different magnetic circuit A1 magnetic resistance is set, thereby forms the first different magnetic circuit magnetic flux Φ m1; Because total magnetic flux (Φ m is total) is definite value substantially, and Φ m2=(Φ m is total)-Φ m1, therefore, when Φ m1 changes, Φ m2 also change (changing in the opposite direction of numerical values recited).When Φ m2 varies in size, the electromagnetic attraction F2 that armature 12 is adsorbed on the iron core pole-shoe face that magnet steel 14 produces by the second magnetic circuit A2 is just not identical, the confining force that is 12 pairs of iron core pole-shoe faces of armature is not identical, thereby can solve the problem that the tandem type magnetic circuit is difficult to involution.Due to the effect of magnetic conductive part 15 with magnet isolation tank 133, the magnetic flux that magnet steel 14 is produced divides for Φ m1 and Φ m2 two-way, and the size of Φ m1 and Φ m2 all can be regulated, thereby solved tandem type magnetic circuit magnet steel magnetic flux, only have a road can't regulate and the problem of the involution difficulty that causes.
When applying the reverse involution pulse voltage of an one fixed width to relay coil, the magnetic flux Φ C2 that coil produces can offset with the magnetic flux Φ m2 that magnet steel 14 itself produces, when magnetic flow (Φ m2-Φ C2) is reduced to its electromagnetic attraction F2 that armature 12 is produced and is less than the counter-force F1 of moving 21 pairs of armature 12 of spring, armature 12 just, under the force action of F2 and F1, completes the course of action of armature 12 from the set position to the involution position; As mentioned above, due to the size that different magnet isolation tank 133 is set, can form different Φ m2, and electromagnetic attraction F2 is produced by magnetic flow (Φ m2-Φ C2), therefore under different Φ m2, make electromagnetic attraction F2 drop to equally the numerical value that is less than counter-force F1, need to change the numerical value of Φ C2, and Φ C2 applies the voltage generation by coil, therefore, change the size of magnet isolation tank 133, can change the size of Φ m2, thereby change the size of the involution voltage that makes the armature involution.
Magnetic circuit shown in the present, in order to ensure certain part strength, therefore the magnetic conduction sectional area 1331(at yoke magnet isolation tank 133 places, both sides is as shown in Figure 5) can not unrestrictedly reduce, therefore Φ m2 can't do too greatly, therefore often apply little reverse involution voltage and just can make the electromagnetic attraction F2 of magnetic flow (Φ m2-Φ C2) generation drop to equally the numerical value that is less than counter-force F1, thereby make the armature involution.And that magnetic latching relay is generally wished on involution voltage and operation voltage numerical value is more approaching better, in order further to improve the numerical value of involution voltage, the present invention prunes one side of something (according to the magnetic circuit principle at the iron core pole-shoe face, iron core pole shoe area is less, its in armature set position to the confining force of armature<magnetic attraction F2 large, make the required involution voltage of its involution larger), thus make numerically balance (as far as possible approaching on numerical values recited) as far as possible of involution voltage and set voltage.
Above-described embodiment only is used for further illustrating the magnetic latching relay of a kind of parallel connection type magnetic circuit of the present invention; but the present invention is not limited to embodiment; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all fall in the protection range of technical solution of the present invention.
Claims (7)
1. the magnetic latching relay of a parallel connection type magnetic circuit, comprise magnetic circuit part; Described magnetic circuit part comprises iron core, armature, yoke, magnet steel, magnetic conductive part and coil; Described yoke is L-type, by the first yoke that is parallel to iron core with perpendicular to the second yoke of iron core, forms; Described iron core is through coil, and the upper end of iron core is provided with pole shoe, and the lower end of iron core and the second yoke fix; Armature is arranged on the knife-edge part of yoke; One end of magnetic conductive part is connected with the first yoke, and the other end of magnetic conductive part is connected with the first yoke by magnet steel; It is characterized in that: on the first yoke between two joints of the first yoke and magnet steel, the first yoke and magnetic conductive part, be provided with the magnet isolation tank of using for increasing the magnetic loop magnetic resistance; One side of described pole shoe is provided with section, with the size of utilizing section, coordinates magnet isolation tank, the mutual balance of the action of regulating relay, involution voltage parameter.
2. the magnetic latching relay of parallel connection type magnetic circuit according to claim 1, it is characterized in that: the section of described pole shoe is for to cut a part along the axisymmetric complete circle of core center.
3. the magnetic latching relay of parallel connection type magnetic circuit according to claim 1, it is characterized in that: the section of described pole shoe is for to cut a part along the axisymmetric complete rectangle of core center.
4. the magnetic latching relay of parallel connection type magnetic circuit according to claim 1, it is characterized in that: an end of described magnetic conductive part is provided with and the contacted contact-making surface of the first yoke.
5. the magnetic latching relay of parallel connection type magnetic circuit according to claim 4 is characterized in that: the contact-making surface of described magnetic conductive part is provided with for the boss with the first yoke location use, and the first yoke is provided with the hole of matching with the magnetic conduction sheet boss; The boss of magnetic conduction sheet is engaged in the hole of the first yoke, and is fixed together by riveted joint or welding manner.
6. the magnetic latching relay of parallel connection type magnetic circuit according to claim 1, it is characterized in that: the other end of described magnet steel and magnetic conductive part fixes, and the other end of magnetic conductive part is provided with for the fixing protruding bud of magnet steel.
7. the magnetic latching relay of parallel connection type magnetic circuit according to claim 1, it is characterized in that: the section of described pole shoe is located at the direction matched towards dynamic and static contact, in order to increase the creepage distance between iron core and static contact spring piece.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310353686.8A CN103426690B (en) | 2013-08-14 | 2013-08-14 | A kind of magnetic latching relay of parallel connection type magnetic circuit |
| US14/911,592 US9754750B2 (en) | 2013-08-14 | 2014-07-22 | Magnetic latching relay of parallel type magnetic circuit |
| PCT/CN2014/082702 WO2015021847A1 (en) | 2013-08-14 | 2014-07-22 | Magnetic latching relay of parallel type magnetic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310353686.8A CN103426690B (en) | 2013-08-14 | 2013-08-14 | A kind of magnetic latching relay of parallel connection type magnetic circuit |
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| CN103426690A true CN103426690A (en) | 2013-12-04 |
| CN103426690B CN103426690B (en) | 2016-02-03 |
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Cited By (8)
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| WO2015021847A1 (en) * | 2013-08-14 | 2015-02-19 | 厦门宏发电声股份有限公司 | Magnetic latching relay of parallel type magnetic circuit |
| CN104377083A (en) * | 2014-10-28 | 2015-02-25 | 谭毕兴 | Electromagnetic relay with special magnetic circuit and reeds fixed |
| CN106601557A (en) * | 2017-01-11 | 2017-04-26 | 厦门宏发电声股份有限公司 | Movable spring and connection structure of movable spring and yoke iron of clapper-type relay |
| CN105161371B (en) * | 2015-08-05 | 2018-04-03 | 哈尔滨工业大学 | A kind of band permanent magnetism monostable clapper-type electromagnetic relay |
| CN108389756A (en) * | 2018-01-26 | 2018-08-10 | 南京理工大学 | A kind of relay of low noise |
| CN109449056A (en) * | 2019-01-04 | 2019-03-08 | 浙江凡华电子有限公司 | A kind of clapper-type magnetic latching relay electromagnetic system and its assembly method |
| CN109830408A (en) * | 2019-03-29 | 2019-05-31 | 苏州吉控电器有限公司 | Magnetic latching relay |
| CN110942955A (en) * | 2018-09-21 | 2020-03-31 | 贵州振华群英电器有限公司（国营第八九一厂） | Can increase initial suction balance force formula relay magnetic circuit structure |
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| CN106910661B (en) * | 2017-03-28 | 2019-05-28 | 厦门宏发电声股份有限公司 | A kind of relay with bilateral holding function |
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| CN108389756A (en) * | 2018-01-26 | 2018-08-10 | 南京理工大学 | A kind of relay of low noise |
| CN108389756B (en) * | 2018-01-26 | 2019-11-15 | 南京理工大学 | A kind of relay of low noise |
| CN110942955A (en) * | 2018-09-21 | 2020-03-31 | 贵州振华群英电器有限公司（国营第八九一厂） | Can increase initial suction balance force formula relay magnetic circuit structure |
| CN110942955B (en) * | 2018-09-21 | 2022-02-18 | 贵州振华群英电器有限公司（国营第八九一厂） | Can increase initial suction balance force formula relay magnetic circuit structure |
| CN109449056A (en) * | 2019-01-04 | 2019-03-08 | 浙江凡华电子有限公司 | A kind of clapper-type magnetic latching relay electromagnetic system and its assembly method |
| CN109830408A (en) * | 2019-03-29 | 2019-05-31 | 苏州吉控电器有限公司 | Magnetic latching relay |
| CN109830408B (en) * | 2019-03-29 | 2023-11-10 | 安徽吉控电器有限公司 | Magnetic latching relay |
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