CN214378260U - Direct current relay capable of improving short-circuit current resistance - Google Patents
Direct current relay capable of improving short-circuit current resistance Download PDFInfo
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- CN214378260U CN214378260U CN202022987631.0U CN202022987631U CN214378260U CN 214378260 U CN214378260 U CN 214378260U CN 202022987631 U CN202022987631 U CN 202022987631U CN 214378260 U CN214378260 U CN 214378260U
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Abstract
The utility model discloses a direct current relay capable of improving the short-circuit current resistance, which comprises two stationary contact leading-out ends, a straight movable reed and a pushing rod component; the movable spring is assembled in the push rod part through at least one elastic piece, so that the two ends of the movable spring are respectively contacted with the bottom ends of the leading-out ends of the two static contacts under the action of the push rod part, and the current flows in from one leading-out end of the static contact and flows out from the other leading-out end of the static contact after passing through the movable spring; in the movable spring piece, at least one magnetic conduction ring which is wrapped around the movable spring piece along the width direction of the movable spring piece is respectively arranged between the two sides of the central line of the length of the movable spring piece and the contact position between the movable spring piece and the stationary contact leading-out end, corresponding to the central line of the length of the movable spring piece, so that at least two magnetic conduction loops which are connected in series are formed in the length direction of the movable spring piece. The utility model discloses can improve the anti short-circuit current ability of product, reduce movable contact spring's assembly difference to the influence of the anti short-circuit current ability of product.
Description
Technical Field
The utility model relates to a relay technical field especially relates to a can improve direct current relay of anti short-circuit current ability.
Background
A direct current relay of prior art, adopt direct action type magnetic circuit structure, two stationary contact lead-out ends (two load lead-out ends) are installed respectively on the casing, the bottom that two stationary contact lead-out ends is established to the stationary contact, the electric current that one of them stationary contact lead-out end flows in, the electric current that another stationary contact led-out end flows out, be equipped with movable spring and catch bar part in the casing, the movable spring adopts straight piece formula movable contact spring (also known as bridge type movable contact spring), the both ends of movable contact spring are established to the movable contact, install in the catch bar part through the spring in the centre of movable contact spring, the catch bar part is connected with direct action type magnetic circuit, under the effect of direct action type magnetic circuit, catch bar part drives the movable contact spring rebound, the both ends of movable contact with the bottom of two stationary contact lead-out ends respectively, thereby realize the intercommunication load. When fault short-circuit current occurs, the direct current relay in the prior art can generate electric repulsion between the movable contact and the static contact, and influences the contact stability between the movable contact and the static contact.
In order to improve the short-circuit current resistance of the direct current relay, in the prior art, an anti-short-circuit ring is additionally arranged in the middle of a movable spring, namely the supporting position of a spring on the movable spring. Fig. 1 is a schematic view of a partial structure of a dc relay capable of resisting short-circuit current in the prior art, fig. 2 is a front view of a partial structure of a dc relay capable of resisting short-circuit current in the prior art, and as shown in fig. 1 and fig. 2, the dc relay includes two stationary contact terminals 101, 102, a straight movable spring piece 103 and a push rod member (not shown in the figure), the middle of the movable spring piece 103 is mounted in the push rod member through a spring 104, so that two ends (i.e. a movable contact) of the movable spring piece 103 are contacted with bottom ends (i.e. stationary contacts) of the two stationary contact terminals 101, 102 under the action of the push rod member, and current is supplied from one stationary contact terminal 101, flows in, passes through the movable contact spring 103, and then flows out from the other stationary contact terminal 102; a magnetic ring 105 surrounding the width of the movable spring plate is arranged in the middle of the movable spring plate 103, namely the supporting position of the spring 104, and the magnetic ring 105 is composed of an upper magnetic conductor 106 and a lower magnetic conductor 107. After the actual short-circuit resistance test, the direct-current relay with the structure disassembles and analyzes the tested samples, and finds that most samples are adhered to the movable spring leaf at one side, namely, the phenomenon of single-side springing-open adhesion occurs after the electric repulsion force is applied. The analysis reason is related to the misalignment of the two ends of the movable spring plate 103 relative to the fulcrum under the force. When fault short-circuit current occurs, the two ends of the movable reed 103 are subjected to electric repulsive force FHThe middle of the movable spring plate 103, namely the support of the spring 104, is subjected to the supporting force F provided by the spring 104 from the push rod partKAnd attraction force F in the direction of contact pressure generated by the short-circuit ringEIn the actual production and assembly process, because the movable spring plate 103 has a certain degree of freedom after being assembled, the distances between contact points (as movable contacts) at the left end and the right end (as movable contacts) and a fulcrum (at the spring 104) are different from L1 and L2, and when L1 is larger than L2, the electric repulsive force F at the right end of the movable spring plate 103HResultant moment MFH(1) The existence of the movable spring can lead the right side of the movable spring to be more easily bounced, so that the right side bonding fails; the larger the difference between L1 and L2, the more obvious the idea is, thereby affecting the effect of resisting short-circuit current.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a can improve direct current relay of anti short-circuit current ability, through institutional advancement, can improve the anti short-circuit current ability of product, reduce the assembly difference of movable contact spring to the influence of the anti short-circuit current ability of product.
The utility model provides a technical scheme that its technical problem adopted is: a direct current relay capable of improving the short-circuit current resistance comprises two stationary contact leading-out terminals, a straight-sheet movable reed and a pushing rod component; the movable spring is assembled in the push rod component through at least one elastic piece, so that the two ends of the length of the movable spring are respectively contacted with the bottom ends of the two stationary contact leading-out ends under the action of the push rod component, and current flows in from one stationary contact leading-out end and flows out from the other stationary contact leading-out end after passing through the movable spring; in the movable spring piece, at least one magnetic conduction ring which is wrapped around the movable spring piece along the width direction of the movable spring piece is respectively arranged between the two sides of the center line of the length of the movable spring piece and the contact position between the movable spring piece and the stationary contact leading-out end, corresponding to the length of the movable spring piece, so that at least two magnetic conduction loops which are connected in series are formed in the length direction of the movable spring piece, the support of the movable spring piece is increased by utilizing the suction force in the contact pressure direction generated by the magnetic conduction rings on the two sides of the center line of the length of the movable spring piece, and the electric repulsion force generated between the movable spring piece and the stationary contact leading-out end due to fault current is resisted.
The elastic piece is a spring, and the spring is one, and the spring is supported at the position of the center line of the length of the movable spring plate.
The elastic part is a spring, the number of the springs is at least two, and the at least two springs are respectively distributed on two sides of the center line of the length of the movable spring leaf.
The at least two springs are respectively supported below the magnetic conduction rings on two sides of the center line of the length of the movable reed, and the number of the springs is less than or equal to that of the magnetic conduction rings.
In the movable spring piece, the magnetic conduction rings arranged on two sides of the central line of the length of the movable spring piece are symmetrically distributed relative to the central line of the length of the movable spring piece.
The magnetic conduction rings arranged on two sides of the central line of the length of the movable spring leaf are deviated to the contact position of the movable spring leaf and the leading-out end of the static contact.
In the movable spring leaf, two magnetic rings are arranged on two sides of the central line of the length of the movable spring leaf respectively, the two magnetic rings are equal in size, and the distances from the two magnetic rings to the central line of the length of the movable spring leaf are the same.
The magnetic conductive ring is composed of an upper magnetic conductor and a lower magnetic conductor, the upper magnetic conductor is fixed in the pushing rod part or at a preset position, and the lower magnetic conductor is fixed on the movable reed.
The upper magnetizer is of a straight-line structure, and the lower magnetizer is of a U-shaped structure; and two ends of the linear structure of the upper magnetizer respectively correspond to two upper ends of the U-shaped structure of the lower magnetizer.
The upper magnetizers of the magnetic conduction rings arranged on the two sides of the central line of the length of the movable reed are connected into a whole.
The direct-current relay comprises a housing, the two stationary contact leading-out ends are respectively installed on the top wall of the housing, the bottom ends of the two stationary contact leading-out ends and the movable spring are respectively accommodated in the housing, and the preset position is the bottom end of a convex part extending downwards from the top wall of the housing.
The direct current relay comprises a yoke iron plate, an inverted U-shaped support is mounted on the yoke iron plate, and the preset position is the inner side of the top wall of the U-shaped support.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses owing to adopted in the movable contact spring, on the both sides of the central line of the length of movable contact spring, corresponding to the central line of the length of movable contact spring to draw forth between the contact position of end with the stationary contact, be equipped with at least one respectively along the width direction of movable contact spring wrap in the magnetic conduction ring of movable contact spring to length direction at the movable contact spring forms the magnetic conduction return circuit of two at least series connections, with the suction in the contact pressure direction that produces by the magnetic conduction ring on the both sides of the central line of the length that utilizes the movable contact spring, increase the support to the movable contact spring, and remove to resist movable contact spring and stationary contact and draw forth the electric repulsion that produces because of the fault current between the end. The utility model discloses a this kind of structure, the magnetic ring that utilizes the both sides of the central line of the length of movable contact spring's length with the same suction of contact pressure direction, increase the support to the movable contact spring for originally there is only the support of a spring position, become a plurality of supports (the support that spring position supported and magnetic ring suction formed), make to support more firm, can improve the anti short-circuit current ability of product, reduce the assembly difference of movable contact spring to the influence of the anti short-circuit current ability of product.
2. The utility model discloses owing to adopted the magnetic conduction ring that will set up on the both sides of the central line of the length of movable contact spring to incline to the contact position of movable contact spring and stationary contact leading-out terminal. The utility model discloses a this kind of structure lets the magnetic ring be close to the contact point more, like this, just makes the arm of force of electric repulsion and the suction of magnetic ring be close more, then reduces the effect of the assembly difference of movable contact spring to the anti short-circuit current ability's of product effect just better.
3. The utility model adopts the upper magnetizer of the magnetic conductive ring which is arranged on the two sides of the central line of the length of the movable reed to be connected into a whole. The utility model discloses a this kind of structure for the area that the last magnetizer that goes up the magnetizer than each individual magnetic conductive ring closes the area bigger, when short-circuit current through the past, it also has an ascending suction to the movable contact spring to go up the magnetizer, it is big more to go up the magnetizer area, then it is also big more to the suction of movable contact spring to go up the magnetizer, this structure can make the magnetizer reach the maximize to the suction of movable contact spring, and the movable contact spring still can receive partly ascending lorentz power, can further promote the anti short circuit performance of product.
The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment, and the dc relay capable of improving the short-circuit current resistance is provided.
Drawings
Fig. 1 is a partial configuration diagram of a dc relay capable of withstanding short-circuit current in the prior art;
fig. 2 is a front view of a partial configuration of a dc relay capable of resisting short-circuit current in the related art;
fig. 3 is a partially exploded view of a first embodiment of the present invention;
fig. 4 is a front view of a partial structure of a first embodiment of the present invention (the movable and stationary contacts are not in contact);
fig. 5 is a front view of a partial structure of a first embodiment of the present invention (the movable and stationary contacts are in contact);
FIG. 6 is a front view of a partial structure of a first embodiment of the present invention (the movable and stationary contacts are not in contact, and the push rod member is removed);
FIG. 7 is a front view of a partial structure of a first embodiment of the present invention (the movable and stationary contacts are in contact, and the push rod member is removed);
fig. 8 is a schematic view illustrating the cooperation between the movable spring plate and the magnetic conductive ring according to the first embodiment of the present invention;
fig. 9 is a schematic view illustrating the effect of short-circuit current resistance according to the first embodiment of the present invention;
FIG. 10 is a front view of a partial structure of a second embodiment of the present invention (the movable and stationary contacts are not in contact, and the push rod member is removed);
fig. 11 is a partially exploded view of a third embodiment of the present invention;
fig. 12 is a schematic view of the movable spring plate and the magnetic conductive ring according to the third embodiment of the present invention;
fig. 13 is a front view of a partial structure of a fourth embodiment of the present invention (the movable and stationary contacts are not in contact, and the push rod member is removed).
Detailed Description
Example one
Referring to fig. 3 to 9, a dc relay capable of improving short-circuit current resistance of the present invention includes two stationary contact terminals 11 and 12, a straight movable contact spring 2 and a push rod member 3; the elastic element of the embodiment is a spring, the spring 4 is one, one spring 4 is supported at the position of the center line of the length of the movable spring leaf 2, the middle of the movable spring leaf 2 is assembled in the push rod part 3 through the spring 4, so that the two ends (which are moving contacts) of the movable spring leaf are respectively contacted with the bottom ends (which are fixed contacts) of the two fixed contact leading-out ends 11 and 12 under the action of the push rod part 3, and the current flows in from one fixed contact leading-out end and flows out from the other fixed contact leading-out end after passing through the movable spring leaf; the push rod part 3 comprises a U-shaped basket 31, a fixing piece 32, a push rod 33 and a spring seat 34, the fixing piece 32 and the push rod 33 form an integral piece through the spring seat 34 formed by injection molding, two ends of the U-shaped basket 31 are respectively connected with the fixing piece 32, the lower end of the spring 4 is matched with the spring seat 34, and the movable spring leaf 2 is pushed to the inner side of the upper wall of the U-shaped basket 31 by the upper end of the spring 4; in the movable spring piece 2, at least one wrapping part is respectively arranged on two sides of the spring supporting position corresponding to the contact position between the spring supporting position and the movable spring piece and the contact position of the leading-out end of the static contact along the width direction of the movable spring pieceAt least two magnetic conductive loops are formed in the length direction of the movable spring plate 2 by the magnetic conductive rings 5 of the movable spring plate, so that the attraction force F in the contact pressure direction generated by the magnetic conductive rings 5 at the two sides of the spring supporting position is utilizedETo increase the support of the movable contact spring 2 and to resist the electric repulsion force F generated by the fault current between the movable contact spring and the stationary contact leading-out terminalH。
In this embodiment, in the movable spring plate 2, there is one magnetic ring 5 disposed on each of two sides of the spring supporting position, and the two magnetic rings 5 have the same size, and the distances from the two magnetic rings 5 to the spring supporting position are the same.
In this embodiment, the magnetic rings 5 disposed on both sides of the spring support position are biased as much as possible toward the contact position of the movable spring piece and the stationary contact leading end (i.e., the contact position of the movable and stationary contacts).
In this embodiment, the magnetic conductive ring 5 is composed of an upper magnetic conductor 51 and a lower magnetic conductor 52, the upper magnetic conductor 51 is fixed in the push rod part 3, and the lower magnetic conductor 52 is fixed on the movable spring plate 2.
Of course, the fixing position of the upper magnetizer may also be other manners, such as being installed in a casing of the dc relay, in this case, the two stationary contact terminals are respectively installed at the top wall of the casing, the bottom ends of the two stationary contact terminals and the movable reed are respectively accommodated in the casing, and the predetermined position is the bottom end of the convex portion extending downward from the top wall of the casing. For another example, the yoke plate may be mounted on a yoke plate of the dc relay, and at this time, the yoke plate is mounted with an inverted U-shaped bracket, and the predetermined position is an inner side of a top wall of the U-shaped bracket.
In this embodiment, the upper magnetizer 51 has a straight-line structure, and the lower magnetizer 52 has a U-shaped structure; two ends of the linear structure of the upper magnetizer 51 correspond to two upper ends of the U-shaped structure of the lower magnetizer 52, respectively. The utility model discloses a magnetic conduction ring 5 wraps in the movable reed along the width direction of movable reed, can be the complete wrapping, also can be the incomplete wrapping, and this embodiment adopts the last magnetizer 51 of a style of calligraphy structure and the lower magnetizer 52 of U type structure to realize wrapping in the movable reed, belongs to the complete wrapping. When the lower magnetizer also adopts a straight-line structure, the side surface of the width of the movable spring leaf is not wrapped, and the condition is incomplete wrapping.
The utility model discloses a can improve direct current relay of anti short-circuit current ability has adopted in movable contact spring 2, on the both sides of spring support position, corresponding to spring support position to with the stationary contact draw forth between the contact position of end, be equipped with at least one respectively along movable contact spring width direction wrap around in movable contact spring's magnetic conduction ring 5 to length direction at movable contact spring 2 forms the magnetic conduction return circuit of two at least series connections, in order to utilize the spring support position both sides by the ascending suction F of the contact pressure side that magnetic conduction ring 5 producedETo form a support for the movable contact spring 2 and to resist the electric repulsion force F generated by the fault current between the movable contact spring and the stationary contact terminalH. The structure of the utility model utilizes the magnetic conduction rings 5 on the two sides of the spring supporting position of the movable reed 2 to have the same suction force F with the contact pressure directionETo form the support for the movable spring leaf, so that the original support with only one spring position is changed into 3 supports (the support force F of the spring position)KSuction force F of support and magnetic conduction ringEThe resulting support) making the support more stable. When the supporting force at three positions is not enough to resist the electric repulsion force, and the single-side spring is opened, the spring opening side can be closed rapidly, as shown in fig. 9, at the moment that the movable reed 2 is opened by the electric repulsion force at a single side (for convenience of description, the angle is enlarged in the figure), the original two-side contact is changed into the single-side contact, namely, the movable reed rotates around a contact point at one side, the conductor conduction at the spring opening side is changed into the electric arc conduction, at the moment, the electric repulsion force is rapidly reduced, the electromagnetic attraction force Fe between the short circuit rings generates upward moment to the movable reed, so that the spring opening side is closed rapidly, and then the leading-out end and the movable reed are welded together by the high temperature of the electric arc. The larger the upward moment of the electromagnetic attraction force Fe on the movable spring piece 2 is, the shorter the bouncing time is, the smaller the influence generated by electric arc is, and the smaller the risk of damage of the ceramic cavity is; the moment is the arm of force x; me ═ Fe1xL1+ Fe2xL 2. Therefore, the utility model discloses compare with middle single short circuit ring, the moment Me of series short circuit ring is bigger, and no matter be left side or right side bullet open, all has the same effect. Thereby making the book practicalThe novel short-circuit current resistance of the product can be improved, and the influence of the assembly difference of the movable spring on the short-circuit current resistance of the product is reduced.
The utility model discloses a can improve direct current relay of anti short-circuit current ability has adopted the magnetic ring 5 that will set up on the both sides of spring support position to be partial to the contact position of movable contact spring and stationary contact leading-out terminal. The utility model discloses a this kind of structure lets the magnetic ring be close to the contact point more, like this, just makes the arm of force of electric repulsion and the suction of magnetic ring be close more, then reduces the effect of the assembly difference of movable contact spring to the anti short-circuit current ability's of product effect just better.
Example two
Referring to fig. 10, the difference between the dc relay of the present invention and the first embodiment is that, two springs 4 are respectively distributed on two sides of the center line of the length of the movable spring piece 2, and are supported below the magnetic rings 5 on two sides of the center line of the length of the movable spring piece, and the number of the springs is equal to the number of the magnetic rings.
When two springs are adopted, the two springs 4 can be respectively distributed below the contact positions of the movable contact and the static contact.
EXAMPLE III
Referring to fig. 11 to 12, a difference between the dc relay according to the present invention and the first embodiment is that the upper magnetizers 51 of the magnetic conductive rings 5 disposed on both sides of the spring supporting position are integrally connected.
The utility model discloses a can improve direct current relay of anti short-circuit current ability has adopted the last magnetizer 51 that will set up the magnetic ring on the both sides of spring-loaded position to link into an integrated entity. The utility model discloses a this kind of structure for the area that the last magnetizer that goes up the magnetizer than each individual magnetic conductive ring closes the area bigger, when short-circuit current through the past, it also has an ascending suction to the movable contact spring to go up the magnetizer, it is big more to go up the magnetizer area, then it is also big more to the suction of movable contact spring to go up the magnetizer, this structure can make the magnetizer reach the maximize to the suction of movable contact spring, and the movable contact spring still can receive partly ascending lorentz power, can further promote the anti short circuit performance of product.
Example four
Referring to fig. 13, the difference between the dc relay of the present invention and the third embodiment is that, two springs 4 are respectively distributed on two sides of the center line of the length of the movable spring piece 2, and are supported below the magnetic rings 5 on two sides of the center line of the length of the movable spring piece, and the number of the springs is equal to the number of the magnetic rings.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solutions disclosed above can be used by those skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (12)
1. A direct current relay capable of improving the short-circuit current resistance comprises two stationary contact leading-out terminals, a straight-sheet movable reed and a pushing rod component; the movable spring is assembled in the push rod component through at least one elastic piece, so that the two ends of the length of the movable spring are respectively contacted with the bottom ends of the two stationary contact leading-out ends under the action of the push rod component, and current flows in from one stationary contact leading-out end and flows out from the other stationary contact leading-out end after passing through the movable spring; the method is characterized in that: in the movable spring piece, at least one magnetic conduction ring which is wrapped around the movable spring piece along the width direction of the movable spring piece is respectively arranged between the two sides of the center line of the length of the movable spring piece and the contact position between the movable spring piece and the stationary contact leading-out end, corresponding to the length of the movable spring piece, so that at least two magnetic conduction loops which are connected in series are formed in the length direction of the movable spring piece, the support of the movable spring piece is increased by utilizing the suction force in the contact pressure direction generated by the magnetic conduction rings on the two sides of the center line of the length of the movable spring piece, and the electric repulsion force generated between the movable spring piece and the stationary contact leading-out end due to fault current is resisted.
2. The direct current relay capable of improving the short-circuit current resistance according to claim 1, characterized in that: the elastic piece is a spring, and the spring is one, and the spring is supported at the position of the center line of the length of the movable spring plate.
3. The direct current relay capable of improving the short-circuit current resistance according to claim 1, characterized in that: the elastic part is a spring, the number of the springs is at least two, and the at least two springs are respectively distributed on two sides of the center line of the length of the movable spring leaf.
4. The direct current relay capable of improving the short-circuit current resistance according to claim 3, wherein: the at least two springs are respectively supported below the magnetic conduction rings on two sides of the center line of the length of the movable reed, and the number of the springs is less than or equal to that of the magnetic conduction rings.
5. The direct current relay capable of improving the short-circuit current resistance according to claim 1, characterized in that: in the movable spring piece, the magnetic conduction rings arranged on two sides of the central line of the length of the movable spring piece are symmetrically distributed relative to the central line of the length of the movable spring piece.
6. The direct current relay capable of improving the short-circuit current resistance according to claim 1, characterized in that: the magnetic conduction rings arranged on two sides of the central line of the length of the movable spring leaf are deviated to the contact position of the movable spring leaf and the leading-out end of the static contact.
7. The direct current relay capable of improving the short-circuit current resistance according to claim 1, characterized in that: in the movable spring leaf, two magnetic rings are arranged on two sides of the central line of the length of the movable spring leaf respectively, the two magnetic rings are equal in size, and the distances from the two magnetic rings to the central line of the length of the movable spring leaf are the same.
8. The direct current relay capable of improving the short-circuit current resistance according to claim 1, 5, 6 or 7, characterized in that: the magnetic conductive ring is composed of an upper magnetic conductor and a lower magnetic conductor, the upper magnetic conductor is fixed in the pushing rod part or at a preset position, and the lower magnetic conductor is fixed on the movable reed.
9. The direct current relay capable of improving the short-circuit current resistance according to claim 8, wherein: the upper magnetizer is of a straight-line structure, and the lower magnetizer is of a U-shaped structure; and two ends of the linear structure of the upper magnetizer respectively correspond to two upper ends of the U-shaped structure of the lower magnetizer.
10. The direct current relay capable of improving the short-circuit current resistance according to claim 7, wherein: the upper magnetizers of the magnetic conduction rings arranged on the two sides of the central line of the length of the movable reed are connected into a whole.
11. The direct current relay capable of improving the short-circuit current resistance according to claim 8, wherein: the direct-current relay comprises a housing, the two stationary contact leading-out ends are respectively installed on the top wall of the housing, the bottom ends of the two stationary contact leading-out ends and the movable spring are respectively accommodated in the housing, and the preset position is the bottom end of a convex part extending downwards from the top wall of the housing.
12. The direct current relay capable of improving the short-circuit current resistance according to claim 8, wherein: the direct current relay comprises a yoke iron plate, an inverted U-shaped support is mounted on the yoke iron plate, and the preset position is the inner side of the top wall of the U-shaped support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022987631.0U CN214378260U (en) | 2020-12-11 | 2020-12-11 | Direct current relay capable of improving short-circuit current resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022987631.0U CN214378260U (en) | 2020-12-11 | 2020-12-11 | Direct current relay capable of improving short-circuit current resistance |
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| Publication Number | Publication Date |
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| CN214378260U true CN214378260U (en) | 2021-10-08 |
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| CN202022987631.0U Active CN214378260U (en) | 2020-12-11 | 2020-12-11 | Direct current relay capable of improving short-circuit current resistance |
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