CN208753226U - Electromagnetic relay for dual power supply switching - Google Patents
Electromagnetic relay for dual power supply switching Download PDFInfo
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- CN208753226U CN208753226U CN201821271736.2U CN201821271736U CN208753226U CN 208753226 U CN208753226 U CN 208753226U CN 201821271736 U CN201821271736 U CN 201821271736U CN 208753226 U CN208753226 U CN 208753226U
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- contact spring
- movable contact
- sliding shoe
- slot
- power supply
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- 230000009977 dual effect Effects 0.000 title claims abstract description 21
- 230000003068 static effect Effects 0.000 claims abstract description 57
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000014676 Phragmites communis Nutrition 0.000 claims description 4
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000012839 conversion disease Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a kind of electromagnetic relays for dual power supply switching, including pedestal, sliding shoe, contact portion and magnetic circuit part；Magnetic circuit part is on pedestal；Sliding shoe is slidably fitted on pedestal；Magnetic circuit part, which has, to be pushed arm and matches with sliding shoe, to be able to drive sliding shoe round-trip；Contact portion includes at least two movable contact springs and at least four static contact spring pieces；Each static contact spring piece is mounted on the base and is in the both sides that symmetric mode is distributed in sliding shoe moving direction；Movable contact spring is straight piece type structure and is the dynamic spring of rigidity；The middle part of each movable contact spring is inserted on sliding shoe respectively, and the stationary contact of the affixed movable contact of single side and static contact spring piece corresponding with sliding shoe both sides matches respectively at the both ends of each movable contact spring.The utility model has the characteristics that electric clearance is long between contact sets, the flight time is short, so as to reduce magnetic air gap and realize being switched fast between conversion electric power on the basis of meeting enough insulation requests between conversion electric power.
Description
Technical field
The utility model relates to relay technical fields, more particularly to a kind of electromagnetism relay for dual power supply switching
Device.
Background technique
With the rapid development of photovoltaic industry, wind-power electricity generation, water generating, in addition to business office building, teaching building, data
The storage electric energy at center, personal big house (villa) storage electric energy also will be more and more common.Stored electric energy is mainly used for
Continued power when grid cut-off, building or house may require in the time that power-off is switched to energy storage device it is not high, and
Voltage and current is not also usually high, and for the server power supply of data center, it is required that power for uninterruptible power supply, so
In grid cut-off, quick seamlessly connection is needed to be switched to backup power source (energy storage device), complete with the data for ensuring to store,
Safety, and the voltage and current of the power supply switched is also increasing.
Fig. 1 is a kind of local structure schematic diagram of electromagnetic relay for dual power supply switching of the prior art, is shown
State when movable contact is in contact with normally-closed contact, Fig. 2 are the top view of the electromagnetic relay of Fig. 1, and Fig. 3 is also the prior art
It is a kind of for dual power supply switching electromagnetic relay local structure schematic diagram, it illustrates movable contacts to connect with normally opened contact
State when touching, Fig. 4 are the top view of the electromagnetic relay of Fig. 3.This electromagnetic relay include sliding shoe 11, movable contact spring 12,
Static contact spring piece 13 and magnetic circuit part 14, sliding shoe 11 are slidably mounted on pedestal (not shown), and magnetic circuit part 14 is on pedestal, magnetic
Road part 14, which has, to push arm 141 and matches with sliding shoe 11, and magnetic circuit part 14 is by pushing the swing of arm 141 to be able to drive
11 back and forth movement of sliding shoe realizes being contacting and separating for sound contact, and movable contact spring 12 is straight piece type structure and is the dynamic spring of rigidity, is moved
There are two reed 12 is total, the middle part of two movable contact springs 12 is inserted into respectively on sliding shoe 11, and the both ends of movable contact spring 12 are respectively and fixedly connected with
There is a conversion hysteria movable contact 121, when movement, the work of front end contact face, when involution, the work of tail portion contact face；Quiet spring shares four groups, packet
Two groups of normally opened quiet springs and two groups of normally closed quiet springs are included, every group there are two static contact spring pieces 13 altogether, are divided to and are in the two of 11 direction of motion of sliding shoe
Side, is connected with stationary contact 131 on static contact spring piece 13, each movable contact spring 12 be in one group of normally opened quiet spring and one group of normally closed quiet spring it
Between, two normally-closed contact groups of this electromagnetic relay are used to connect power supply A1, power supply A2, and two normally opened contact groups are then used to connect
Power supply B1, power supply B2 are met, it is double in order to meet when this electromagnetic relay is applied to backup power source voltage and all bigger electric current
Insulation request between power supply requires to need to be arranged between A1 power supply and B1 power supply, A2 power supply and B2 power supply in safety bigger
Electric clearance (generally requires more than 3mm), to prevent that puncture short occurs between two power supplys, power supply is caused to burn even prestige
Coerce personal safety, the loss of property.It is well known that between contact sets electric clearance refer to it is most short between two groups of different contact sets
Air distance, that is, the most short air distance L5 between the contact sets of connection power supply A1 and the contact sets for connecting power supply B1, connection electricity
Most short air distance L6 between the contact sets of source A2 and the contact sets for connecting power supply B2, in relay field, relay
Actuation time is made of excitation time and flight time, when excitation time refers to that the coil magnetization moment plays normally-closed contact and just separates
Time, be to be determined by the parameter of coil；Flight time refers to playing normally opened contact at the time of just separation from normally-closed contact rigid
Time when contact, flight time are influenced by contactor gap and magnetic air gap, and are mainly affected by magnetic air gap, magnetic circuit
Air gap is bigger, and the flight time is longer, conversely, magnetic air gap is smaller, the flight time is shorter.This relay of the prior art,
After bigger electric clearance is arranged, magnetic air gap b must also be accordingly increased, to meet the requirement of impulse stroke；But magnetic
After road air gap b increases, the quick seamless connection being just difficult to realize between two power supplys easily causes abnormal power-off, does not have
The effect of backup power source.
Utility model content
The purpose of the utility model is to overcome the deficiency of the prior art, provide a kind of electromagnetism for dual power supply switching after
Electric appliance is improved by structure, has the characteristics that electric clearance is long between contact sets, the flight time is short, so as to convert meeting
Between power supply on the basis of enough insulation requests, reduces magnetic air gap and realize being switched fast between conversion electric power.
The technical scheme adopted by the utility model to solve the technical problem is as follows: it is a kind of for dual power supply switching electromagnetism after
Electric appliance, including pedestal, sliding shoe, contact portion and magnetic circuit part；The magnetic circuit part is on pedestal；The sliding shoe sliding
Cooperation is on pedestal；The magnetic circuit part, which has, to be pushed arm and matches with sliding shoe, to be able to drive sliding shoe round-trip；
The contact portion includes at least two movable contact springs and at least four static contact spring pieces；At least four static contact spring piece is mounted on the base
And the both sides of sliding shoe moving direction are distributed in symmetric mode, stationary contact, symmetrical two quiet springs are housed on each static contact spring piece
Piece constitutes one group；Each movable contact spring is straight piece type structure and moves spring for rigidity；The middle part of each movable contact spring is inserted into cunning respectively
On motion block, the both ends difference affixed movable contact of single side of each movable contact spring and the stationary contact of static contact spring piece corresponding with sliding shoe both sides
Point matches；Every two movable contact spring is located between corresponding two groups of static contact spring pieces, the stationary contact on two groups of static contact spring pieces it is opposite and
If；Two movable contacts on one of movable contact spring towards one side and it is opposite with the stationary contact on one group of static contact spring piece on the side,
In two movable contacts on another movable contact spring towards another side and it is opposite with the stationary contact on another group of static contact spring piece of another side.
The sliding shoe is equipped with the slot consistent with the quantity of at least two movable contact spring, and described at least two is dynamic
Reed is inserted into respectively in corresponding slot.
The middle part of the straight piece type structure of the movable contact spring also to have protrusion and make movable contact spring become T-shaped structure, institute
The slot for stating sliding shoe includes the through slot on top and the card slot of lower part, and the straight piece type structure of the movable contact spring cooperates in sliding shoe
In the through slot of slot, the protrusion of the movable contact spring cooperates in the card slot of the slot of sliding shoe.
The both sides of the protrusion of the movable contact spring are respectively equipped with the first convex bud, the movable contact spring protrude through the first convex bud with
The card slot of the slot of sliding shoe is matched in interference.
The centre of the straight piece type structure of the movable contact spring is on thickness equipped with the second convex bud formed after being struck by spring body, institute
The straight piece type structure for stating movable contact spring is matched with the through slot of the slot of sliding shoe in interference by the second convex bud.
In the through slot of the slot of the sliding shoe, in the side cell wall of the second convex bud of the straight piece type structure back to movable contact spring
It is additionally provided with the convex bud of third, to realize tight fit by the convex bud of third and the straight piece type structure of the movable contact spring.
The contact portion includes four movable contact springs and eight static contact spring pieces；Eight static contact spring pieces are mounted on the base and are in
Symmetric mode is distributed in the both sides of sliding shoe moving direction.
Compared with prior art, the beneficial effects of the utility model are:
Contact portion is designed to include at least two movable contact springs and at least four quiet springs due to using by the utility model
Piece；At least four static contact spring piece is mounted on the base and is in the both sides that symmetric mode is distributed in sliding shoe moving direction, each
Stationary contact is housed, symmetrical two static contact spring pieces constitute one group on static contact spring piece；Each movable contact spring is straight piece type structure and is rigid
Dynamic spring；The middle part of each movable contact spring is inserted on sliding shoe respectively, and the affixed movable contact of single side is distinguished at the both ends of each movable contact spring
And the stationary contact of static contact spring piece corresponding with sliding shoe both sides matches；Every two movable contact spring be located at corresponding two groups of static contact spring pieces it
Between, the stationary contact on two groups of static contact spring pieces is opposite and sets；Two movable contacts on one of movable contact spring towards one side and with
Stationary contact on one group of static contact spring piece on the side is opposite, two movable contacts on another one movable contact spring towards another side and with it is another
Stationary contact on another group of static contact spring piece on one side is opposite.This structure of the utility model have between contact sets electric clearance it is long,
Flight time short feature, so as to reduce magnetic circuit gas on the basis of meeting enough insulation requests between conversion electric power
Gap and realize being switched fast between conversion electric power.
The utility model is described in further detail with reference to the accompanying drawings and embodiments；But a kind of use of the utility model
It is not limited to the embodiment in the electromagnetic relay of dual power supply switching.
Detailed description of the invention
Fig. 1 be the prior art it is a kind of for dual power supply switching electromagnetic relay (movable contact is in contact with normally-closed contact
When state) local structure schematic diagram；
Fig. 2 is the top view of electromagnetic relay described in Fig. 1；
Fig. 3 be the prior art it is a kind of for dual power supply switching electromagnetic relay (movable contact is in contact with normally opened contact
When state) local structure schematic diagram；
Fig. 4 is the top view of electromagnetic relay described in Fig. 3；
Fig. 5 is the local structure schematic diagram of the utility model (state when movable contact is in contact with normally-closed contact)；
Fig. 6 is the top view of electromagnetic relay described in Fig. 5；
Fig. 7 is the local structure schematic diagram of the utility model (state when movable contact is in contact with normally opened contact)；
Fig. 8 is the top view of electromagnetic relay described in Fig. 7；
Fig. 9 is the D structure schematic diagram that the utility model sliding shoe is matched with movable contact spring；
Figure 10 is the main view that the utility model sliding shoe is matched with movable contact spring；
Figure 11 is the top view that the utility model sliding shoe is matched with movable contact spring；
Figure 12 is the cross-sectional view of the M-M line along Figure 10；
Figure 13 is the D structure schematic diagram of the movable contact spring of the utility model.
Specific embodiment
Embodiment
Referring to shown in Fig. 5 to Figure 13, a kind of electromagnetic relay for dual power supply switching of the utility model, including pedestal
(not shown), sliding shoe 2, contact portion 3 and magnetic circuit part 4；The magnetic circuit part 4 is on pedestal；The sliding shoe 3 slides
Cooperation is on pedestal；The magnetic circuit part 4, which has, to be pushed arm 41 and matches with sliding shoe 2, round-trip to be able to drive sliding shoe 2
It is mobile；The contact portion 3 includes at least two movable contact springs 31 and at least four static contact spring pieces 32；At least four static contact spring piece 32
It is mounted on the base and is in the both sides that symmetric mode is distributed in 2 moving direction of sliding shoe, stationary contact is housed on each static contact spring piece 32
34, symmetrical two static contact spring pieces 32 constitute one group；Each movable contact spring 31 is straight piece type structure and moves spring for rigidity；Each dynamic spring
The middle part of piece 31 is inserted into respectively on sliding shoe 2, the affixed movable contact 33 of the both ends of each movable contact spring 31 difference single side and with cunning
The stationary contact 34 of the corresponding static contact spring piece 32 on 2 both sides of motion block matches；Every two movable contact spring 31 is located at corresponding two groups of static contact spring pieces
Between 32, the stationary contact 34 on two groups of static contact spring pieces 32 is opposite and sets；Two movable contacts 33 on one of movable contact spring 31
Relatively with the stationary contact 34 on one group of static contact spring piece 32 on the side towards one side, two dynamic touchings on another one movable contact spring 31
Point 33 towards another side and it is opposite with the stationary contact 34 on another group of static contact spring piece 32 of another side.
In the present embodiment, contact portion 3 includes four movable contact springs 31 and eight static contact spring pieces 32；Eight static contact spring pieces 32 peace
The both sides of 2 moving direction of sliding shoe are distributed on pedestal and in symmetric mode.
In the present embodiment, in four movable contact springs 31, wherein two movable contact springs 31 are located at wherein two groups of static contact spring pieces 32 (i.e. four
A static contact spring piece) between, it forms one group of normally-closed contact group and one group is opened normal contact sets, constitute the contact sets and connection of connection power supply A1
The contact sets of power supply B1, other two movable contact spring 31 are located between wherein other two groups of static contact spring pieces 32 (i.e. four static contact spring pieces), shape
Normal contact sets are opened at another set normally-closed contact group and another set, constitute the contact sets of connection power supply A2 and connect power supply B2's
Contact sets.
It in the present embodiment, is set on the sliding shoe 2 there are four slot 21, four movable contact springs 31 are inserted into corresponding insert respectively
In slot 21, wherein the slot of the slot of the contact sets for the power supply A1 that is used to be cooperatively connected and the contact sets for the power supply B1 that is cooperatively connected
The relative close that leans on, and the slot of the contact sets for the power supply A1 that is used to be cooperatively connected and the contact sets for the power supply A2 that is cooperatively connected
Slot leans on relatively far away from.
In the present embodiment, the middle part of the straight piece type structure 311 of the movable contact spring 31 also to have protrusion 312 and make spring
Piece 31 becomes T-shaped structure, and card slot 212 of the slot 21 of the sliding shoe 2 including the through slot 211 on top and lower part is described dynamic
The straight piece type structure 311 of reed 31 cooperates in the through slot 211 of the slot 21 of sliding shoe 2, and the protrusion 312 of the movable contact spring 31 is matched
It closes in the card slot 212 of the slot 21 of sliding shoe 2.
In the present embodiment, the both sides of the protrusion 312 of the movable contact spring 31 are respectively equipped with first convex luxuriant 3121, the movable contact spring
31 protrusion 312 is matched with the card slot 212 of the slot 21 of sliding shoe 2 in interference by first convex luxuriant 3121.
In the present embodiment, the centre of the straight piece type structure 311 of the movable contact spring 31 is on thickness equipped with after being struck by spring body
The straight piece type structure 311 of second convex luxuriant 3111 formed, the movable contact spring 31 passes through second convex luxuriant 3111 and the slot of sliding shoe 2
21 through slot 211 is matched in interference.
In the present embodiment, in the through slot 211 of the slot 21 of the sliding shoe 2, in the straight piece type structure back to movable contact spring
The side cell wall of second convex bud is additionally provided with third convex luxuriant 2111, to pass through the straight piece type of third convex luxuriant 2111 and the movable contact spring 31
Structure 311 realizes tight fit.
As shown in Fig. 5 to Fig. 8, safety electric clearance between A1 power supply and B2 power supply, A2 power supply and B2 power supply require by
Two movable contact springs are divided into two parts, and a part is that (safety requirement 1.5mm working gas gap just can satisfy by working gas gap L1, L3
The voltage and current disjunction requirement of the power supplys such as most of commercialization, household), another part is that air gap L2, L4 is isolated, and L1+L2=
L5, L3+L4=L6, after this setup, magnetic air gap theoretically a=1/2b, it is ensured that meet safety electric clearance
Meanwhile switching connection quickly seamless between two power supplys may be implemented.Also, use this setup, L1, L2, L3, L4
Size of gaps, can be adjusted according to the needs for being applicable in power supply, without influencing each other.
A kind of electromagnetic relay for dual power supply switching of the utility model, is designed to wrap using by contact portion 3
Include at least two movable contact springs 31 and at least four static contact spring pieces 32；At least four static contact spring piece 32 is mounted on the base and in symmetrical
Mode is distributed in the both sides of 2 moving direction of sliding shoe, and stationary contact 34, symmetrical two static contact spring pieces 32 are housed on each static contact spring piece 32
Constitute one group；Each movable contact spring 31 is straight piece type structure and moves spring for rigidity；The middle part of each movable contact spring 31 is inserted into respectively
On sliding shoe 2, the both ends difference affixed movable contact 33 of single side and quiet spring corresponding with 2 both sides of sliding shoe of each movable contact spring 31
The stationary contact 34 of piece 32 matches；Every two movable contact spring 31 is located between corresponding two groups of static contact spring pieces 32, two groups of static contact spring pieces
Stationary contact 34 on 32 is opposite and sets；One group towards one side and with the side of two movable contacts 33 on one of movable contact spring 31
Stationary contact 34 on static contact spring piece 32 is opposite, two movable contacts 33 on another one movable contact spring 31 towards another side and with it is another
Stationary contact 34 on another group of static contact spring piece 32 on side is opposite.This structure of the utility model has electric clearance between contact sets
Feature long, the flight time is short, so as to reduce magnetic circuit on the basis of meeting enough insulation requests between conversion electric power
Air gap, after magnetic air gap becomes smaller, so that the push card radius of gyration does not need too greatly, it is only necessary to the lateral distance L2 of promotion, so that it may
To realize the demand of distance L5 originally, moreover, push card is available to biggish initial acceleration after coil magnetization, and
Quick acting, thus reduce the flight time of relay, being switched fast between realization dual power supply.
The preferred embodiment of above-mentioned only the utility model, does not impose any limitation on the present invention.Though
So the utility model has been disclosed with preferred embodiment as above, however is not intended to limit the utility model.It is any to be familiar with this field
Technical staff, in the case where not departing from technical solutions of the utility model range, all using the technology contents of the disclosure above
Many possible changes and modifications are made to technical solutions of the utility model, or are revised as equivalents equivalent embodiment.Therefore,
All contents without departing from technical solutions of the utility model, according to the utility model technical spirit made to the above embodiment
What simple modification, equivalent variation and modification should all be fallen in the range of technical solutions of the utility model protection.
Claims (7)
1. a kind of electromagnetic relay for dual power supply switching, including pedestal, sliding shoe, contact portion and magnetic circuit part；It is described
Magnetic circuit part is on pedestal；The sliding shoe is slidably fitted on pedestal；The magnetic circuit part have push arm and with sliding
Block matches, to be able to drive sliding shoe round-trip；The contact portion includes that at least two movable contact springs and at least four are quiet
Reed；At least four static contact spring piece is mounted on the base and is in the both sides that symmetric mode is distributed in sliding shoe moving direction, often
Stationary contact is housed, symmetrical two static contact spring pieces constitute one group on a static contact spring piece；Each movable contact spring is straight piece type structure and is rigid
Property dynamic spring；It is characterized by: the middle part of each movable contact spring is inserted on sliding shoe respectively, single side is distinguished at the both ends of each movable contact spring
The stationary contact of an affixed movable contact and static contact spring piece corresponding with sliding shoe both sides matches；Every two movable contact spring is located at corresponding
Between two groups of static contact spring pieces, the stationary contact on two groups of static contact spring pieces is opposite and sets；Two movable contacts on one of movable contact spring
Towards one side and, two movable contact directions another one movable contact spring on opposite with the stationary contact on one group of static contact spring piece on the side
Another side and it is opposite with the stationary contact on another group of static contact spring piece of another side.
2. the electromagnetic relay according to claim 1 for dual power supply switching, it is characterised in that: set on the sliding shoe
There is the slot consistent with the quantity of at least two movable contact spring, at least two movable contact spring is inserted into corresponding insert respectively
In slot.
3. it is according to claim 2 for dual power supply switching electromagnetic relay, it is characterised in that: the movable contact spring it is straight
The middle part of piece type structure also to have protrusion and make movable contact spring become T-shaped structure, the slot of the sliding shoe includes top
Through slot and lower part card slot, the straight piece type structure of the movable contact spring cooperates the dynamic spring in the through slot of the slot of sliding shoe
The protrusion of piece cooperates in the card slot of the slot of sliding shoe.
4. it is according to claim 3 for dual power supply switching electromagnetic relay, it is characterised in that: the movable contact spring it is convex
Both sides out are respectively equipped with the first convex bud, and the card slot for protruding through the first convex bud and the slot of sliding shoe of the movable contact spring was in
It is full of and matches.
5. it is according to claim 3 for dual power supply switching electromagnetic relay, it is characterised in that: the movable contact spring it is straight
Equipped with the second convex bud formed after being struck by spring body on thickness, the straight piece type structure of the movable contact spring is logical for the centre of piece type structure
The second convex bud is crossed to match with the through slot of the slot of sliding shoe in interference.
6. the electromagnetic relay according to claim 5 for dual power supply switching, it is characterised in that: the sliding shoe is inserted
In the through slot of slot, it is additionally provided with the convex bud of third in the side cell wall of the second convex bud of the straight piece type structure back to movable contact spring, to pass through
The convex bud of third and the straight piece type structure of the movable contact spring realize tight fit.
7. according to claim 1 to the electromagnetic relay for being used for dual power supply switching described in any claim in 6, feature exists
In: the contact portion includes four movable contact springs and eight static contact spring pieces；Eight static contact spring pieces are mounted on the base and are in symmetrical
Mode is distributed in the both sides of sliding shoe moving direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821271736.2U CN208753226U (en) | 2018-08-08 | 2018-08-08 | Electromagnetic relay for dual power supply switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821271736.2U CN208753226U (en) | 2018-08-08 | 2018-08-08 | Electromagnetic relay for dual power supply switching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208753226U true CN208753226U (en) | 2019-04-16 |
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ID=66059652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821271736.2U Active CN208753226U (en) | 2018-08-08 | 2018-08-08 | Electromagnetic relay for dual power supply switching |
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| CN (1) | CN208753226U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108962686A (en) * | 2018-08-08 | 2018-12-07 | 漳州宏发电声有限公司 | A kind of electromagnetic relay for dual power supply switching |
-
2018
- 2018-08-08 CN CN201821271736.2U patent/CN208753226U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108962686A (en) * | 2018-08-08 | 2018-12-07 | 漳州宏发电声有限公司 | A kind of electromagnetic relay for dual power supply switching |
| CN108962686B (en) * | 2018-08-08 | 2024-08-09 | 漳州宏发电声有限公司 | Electromagnetic relay for switching dual power supplies |
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