Contact unit, electronic control portion, and relay

Abstract

The present application discloses a contact unit, an electronic control portion, and a relay. The contact unit comprises at least two contact element groups arranged along an X-axis direction; each contact element group comprises a moving contact element group and a static contact element group, which are oppositely disposed along a Y-axis direction; each moving contact element group is provided along a Z-axis direction, along a Z-axis direction, with at least two moving contact elements which are adapted for parallel connection, a middle portion of each moving contact element being an arc control moving contact element; compared with other moving contact elements, a contact stroke of the arc control moving contact element is shorter along the Y-axis direction, so as to cause the arc control moving contact element to disconnect from the static contact element group later than other moving contact elements; and the positions of arc control moving contact elements of adjacent moving contact element groups along the Z-axis direction are different. The electronic control portion and the relay comprise the described contact unit. By using the described technical solution, short circuit problems are less likely to occur between heterogeneous phases.

Description

Contact unit, electric control part and relay

[0001] This application claims priority to a Chinese patent application filed on March 22, 2024, with application number 202410338708.1, entitled “A Contact Unit, Electric Control Part, and Relay,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of relays, and in particular to a contact unit, an electric control part and a relay. Background Art

[0003] In the prior art, there is a relay that includes an electronic control part for controlling the on and off of an external circuit. The electronic control part includes a push card, a contact group, and an elastic group. The push card is driven by the armature to move along the Y-axis. The contact group includes a moving contact and two static contacts. The two static contacts are arranged along the X-axis and are used to electrically connect to the external circuit. The moving contact is pushed by the push card to contact or move away from the two static contacts along the Y-axis. When the moving contact contacts the two static contacts, the two static contacts are connected; when the moving contact moves away from the two static contacts, the two static contacts are disconnected. The moving contact generally has an overcurrent bridge extending along the X-axis and two moving contacts fixed to the overcurrent bridge and arranged along the X-axis. The two moving contacts are arranged corresponding to the two static contacts. The static contacts are provided with static contacts corresponding to the moving contacts along the Y-axis. The elastic member group is generally arranged between the push card and the contact member group. It stores energy when the moving contact contacts the two static contacts and releases energy when the moving contact moves away from the two static contacts. By providing the elastic member group, after the moving contact contacts the corresponding static contact after the contact stroke, the push card can further move along the Y-axis direction and compress the elastic member group, thereby having an overtravel. The advantage of this relay is that the safe distance between the moving contact and the static contact is twice the contact stroke of the moving contact. Therefore, this relay has better pressure resistance. Here, the contact stroke refers to the distance between the moving contact and the corresponding static contact along the Y-axis direction when the moving contact moves away from the two static contacts.

[0004] When this structure is applied to control two or more phases of AC power, each contact group is used to control the on / off of one phase, thus forming a contact unit requiring at least two contact groups. The applicant has found that when the contact groups of the contact unit are arranged along the X-axis, short circuits are likely to occur between different phases.

[0005] Application Contents

[0006] The purpose of this application is to overcome the above-mentioned defects or problems in the background technology and to provide a contact unit, an electrical control part and a relay, wherein when each contact group is arranged along the X-axis direction, short circuit problems are less likely to occur between different phases.

[0007] The present application provides a contact unit, which includes at least two contact groups arranged along the X-axis direction; the contact groups include a moving contact group and a static contact group arranged relatively along the Y-axis direction; each of the moving contact groups is arranged along the Z-axis direction with at least two moving contacts suitable for parallel connection, and some of the moving contacts are arc-control moving contacts; the arc-control moving contact has a shorter contact stroke along the Y-axis direction than the other moving contacts, so that the arc-control moving contact is disconnected from the static contact group later than the other moving contacts; the positions of the arc-control moving contacts along the Z-axis direction are different from each other between adjacent moving contact groups.

[0008] In some embodiments of the present application, the moving contact is provided with two moving contacts along the X-axis direction; the static contact group includes two static contacts corresponding to the two moving contacts; the static contact is provided with a static contact corresponding to the moving contact; the contact stroke of the moving contact is the distance between the moving contact of the moving contact and the corresponding static contact when the moving contact group moves away from the static contact group along the Y-axis direction.

[0009] In some embodiments of the present application, the number of the contact groups is three.

[0010] The present application provides an electronic control part, which is used to control the on and off of an external circuit, and includes a push card, an elastic member group, a limit member and a contact unit as described in any of the above embodiments; the elastic member group and the limit member are the same in number as the movable contact member group and correspond one-to-one to each other; the elastic member group is located between the push card and the movable contact member group along the Y-axis direction; the limit member is fixed relative to the push card and abuts against each movable contact member along the Y-axis direction when the movable contact member group is away from the static contact member group to limit the contact stroke of each movable contact member.

[0011] In some embodiments of the present application, the push card has an overtravel, and the difference between the contact travel of the arc-control movable contact and the contact travel of the other movable contacts is smaller than the overtravel of the push card.

[0012] In some embodiments of the present application, the limiting member is provided with a protrusion suitable for abutting against all other movable contact members.

[0013] In some embodiments of the present application, it also includes connecting members of the same number as the limiting members and one by one with each other; each of the connecting members is injection-molded as one piece with the push card insert; the two ends of the connecting member along the Z-axis direction respectively extend out of the push card, and the limiting members are adapted and fixedly connected to the two ends of the connecting member.

[0014] In some embodiments of the present application, the number of the movable contacts in each movable contact group is two; the two ends of the same connecting member have different shapes, and the two ends of adjacent connecting members are arranged inverted.

[0015] The present application also provides a relay, which includes a housing, a magnetic circuit part and an electric control part as described in any one of the third to seventh technical solutions; the magnetic circuit part drives the pushing card to move along the Y-axis direction.

[0016] In some embodiments of the present application, it also includes a first separator; the first separator separates adjacent contact member groups along the X-axis direction; one of the accommodating member and the pushing card is fixedly connected to the first separator, and the other one is provided with a slot for inserting the first separator along the Y-axis direction.

[0017] In some embodiments of the present application, it includes a second partition; the second partition is located on both sides of the contact unit along the X-axis direction; the second partition is fixedly connected to the accommodating member or the pushing card.

[0018] In some embodiments of the present application, the first separator and the second separator are made of high-temperature resistant insulating material.

[0019] In some embodiments of the present application, the magnetic circuit portion includes an armature assembly; the armature assembly moves along the Y-axis direction; the push card and the armature assembly are insert-molded as one piece.

[0020] In some embodiments of the present application, the push card includes a receiving portion and a connecting portion; the receiving portion is used to receive the armature assembly, the connecting portion is used to install and support the movable contact assembly, and the connecting portion extends along the X-axis direction.

[0021] In some embodiments of the present application, one side of the accommodating portion along the Y-axis direction is connected to a middle position of the connecting portion along the X-axis direction.

[0022] In some embodiments of the present application, the magnetic circuit portion further includes a coil assembly, and the coil assembly is provided with two magnetic drive ends, and the two magnetic drive ends are used to drive the armature assembly to move along the Y-axis direction.

[0023] In some embodiments of the present application, the armature assembly includes a permanent magnet and two armatures, the two armatures are respectively fixed to the two magnetic poles of the permanent magnet, the two armatures are respectively a first armature and a second armature, the first armature is provided with a first attraction part and a second attraction part, the second armature is provided with a third attraction part and a fourth attraction part; the armature moves along the Y-axis direction between a first position and a second position; in the first position, the first attraction part and the third attraction part are respectively attracted or close to the two magnetic drive ends, and in the second position, the fourth attraction part and the second attraction part are respectively attracted or close to the two magnetic drive ends.

[0024] In some embodiments of the present application, the coil assembly includes a coil winding, the coil winding extends along the X-axis direction, and the two magnetic drive ends are arranged along the X-axis direction; the projections of the first armature and the second armature on a first projection plane perpendicular to the Z-axis direction intersect with each other, and the intersecting parts are arranged at intervals along the Z-axis direction.

[0025] In some embodiments of the present application, at least two magnetic conductive groups are further included, each magnetic conductive group corresponds to a contact member group, and each magnetic conductive group includes a first magnetic conductive group and a second magnetic conductive group. The first magnetic conductive group is fixed relative to the moving contact member group, and the second magnetic conductive group is fixed relative to the static contact member group. When current flows through the moving contact member group, a magnetic circuit is formed between the first magnetic conductive group and the second magnetic conductive group and they attract each other.

[0026] Compared with the prior art, the above solution has the following beneficial effects:

[0027] The applicant discovered that because the current flow directions of the movable contacts at both ends of the same movable contact are opposite, when the contact groups of the contact unit are arranged along the X-axis, when the movable contacts in the movable contact group disconnect from the static contact group, the repulsive Lorentz force causes the arc to easily overflow to both sides along the X-axis. Once the arcs overflowing from adjacent contact groups come into contact, a short circuit occurs between the out-of-phase contacts. In an embodiment of the present application, because the movable contacts in the same movable contact group are suitable for parallel connection, by providing an arc-control movable contact with a shorter contact stroke, the arc-control movable contact is disconnected from the static contact group later than the other movable contacts. As a result, the arc occurs at the arc-control movable contact and is less likely to occur at the other movable contacts. Because the arc-control movable contacts of adjacent movable contact groups are positioned differently along the Z-axis, when the arc overflows to both sides along the X-axis, the arcs generated by the adjacent contact groups are misaligned along the Z-axis and are less likely to come into contact, making short circuits less likely to occur between the out-of-phase contacts.

[0028] In the embodiment of the present application, by relatively pushing the fixed limiting member of the card against each movable contact to limit the contact stroke of each movable contact, the contact stroke of each movable contact can be more conveniently controlled.

[0029] In the embodiments of the present application, because the difference between the contact travel of the arc-control movable contact and the contact travel of the other movable contacts is less than the overtravel of the push card, when the overtravel ends, all movable contacts are subjected to the same elastic force from the elastic member assembly. When the relay is in the on state and subjected to a high fault current, all movable contacts are unlikely to disengage from the static contact assembly, thereby ensuring the relay's load capacity.

[0030] In an embodiment of the present application, by providing a protrusion suitable for abutting other movable contacts on the limiting member, the other movable contacts are further away from the static contact group than the arc-control movable contact in the disconnected state.

[0031] In the embodiment of the present application, the connecting member and the push card insert are integrally formed by injection molding, so that the limiting member is easier to fix relative to the push card, and the limiting member has stronger rigidity and better limiting effect on the dynamic contact member.

[0032] In the embodiment of the present application, by making the shapes of the two ends of the same connecting piece different, it is possible to form a fool-proof design by reversing the positions of the two ends of adjacent connecting pieces along the Z-axis direction when the shapes of the connecting pieces and the shapes of the limiting pieces are exactly the same. When there are two moving contacts in each moving contact group, it is possible to ensure that the positions of the arc-control moving contacts along the Z-axis direction are different from each other between adjacent moving contact groups.

[0033] In an embodiment of the present application, a first separator separates adjacent contact groups, and the first separator can be inserted into the slot along the Y-axis direction. The conduction path between adjacent contact groups is lengthened. Therefore, when an arc is drawn between the moving contact group and the static contact group, the arcs of adjacent contact groups are less likely to contact and conduct, so short circuit problems are less likely to occur between different phases.

[0034] In an embodiment of the present application, a second separator is provided on both sides of the contact unit along the X-axis. When the two outermost contact groups along the X-axis pull an arc, the second separator can block the arc, so that the arc is not likely to cause damage to other components located outside the contact unit along the X-axis, thereby increasing the service life of the relay.

[0035] In the embodiment of the present application, the first separator and the second separator are both made of high-temperature resistant insulating material, which can increase the service life of the first separator, the second separator and the relay when the current is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a perspective view of a relay in an embodiment;

[0037] FIG2 is a schematic diagram of the internal structure of a relay in an embodiment;

[0038] FIG3 is a perspective view of a housing in an embodiment;

[0039] FIG4 is a perspective view of a cover body in an embodiment;

[0040] FIG5 is a top view of the magnetic circuit portion in the embodiment;

[0041] FIG6 is an exploded perspective view of the coil assembly in the embodiment;

[0042] FIG7 is a perspective view of the armature assembly in the embodiment;

[0043] FIG8 is a schematic diagram of a magnetic circuit portion when the armature assembly is in a magnetic holding state at the first position according to an embodiment;

[0044] FIG9 is a schematic diagram of the magnetic circuit portion of the embodiment when the coil assembly just receives the first pulse electrical signal;

[0045] FIG10 is a schematic diagram of the magnetic circuit portion when the armature assembly moves to the point where the movable contact contacts the stationary contact in the embodiment;

[0046] FIG11 is a schematic diagram of the magnetic circuit portion when the armature assembly moves to the second position in the embodiment;

[0047] FIG12 is a schematic diagram of a magnetic circuit portion when the armature assembly is in a magnetic holding state at the second position according to an embodiment;

[0048] FIG13 is a schematic diagram of the magnetic circuit portion of the embodiment when the coil assembly just receives the second pulse electrical signal;

[0049] FIG14 is a schematic diagram of the magnetic circuit portion when the armature assembly moves to the first position in the embodiment;

[0050] FIG15 is an exploded perspective view of the electronic control part in the embodiment;

[0051] FIG16 is a perspective view of the push card, the armature assembly and the connector in the embodiment;

[0052] FIG17 is a front view of three connecting members in the embodiment;

[0053] FIG18 is an exploded perspective view of a contact unit in an embodiment;

[0054] FIG19 is a schematic structural diagram of a magnetizer group according to an embodiment;

[0055] FIG20 is an exploded perspective view of the components of the electric control part except the static contact assembly in the embodiment;

[0056] FIG21 is a perspective view of a position limiting member in an embodiment;

[0057] FIG22 is a top view of the relay in the embodiment;

[0058] FIG23 is a cross-sectional view taken along line AA of FIG22 ;

[0059] FIG24 is a partial enlarged view of portion B of FIG23;

[0060] FIG25 is a partial enlarged view of portion C of FIG23;

[0061] FIG26 is a schematic structural diagram of the relay when the armature assembly is in the first position according to the embodiment;

[0062] FIG27 is a sectional view taken along line DD of FIG26 ;

[0063] FIG28 is a partial enlarged view of portion E of FIG27 ;

[0064] FIG29 is a schematic structural diagram of the relay when the armature assembly is in the second position according to the embodiment;

[0065] FIG30 is a cross-sectional view taken along line FF of FIG29;

[0066] FIG31 is a partial enlarged view of part I of FIG30;

[0067] FIG32 is a cross-sectional view taken along line GG of FIG29 ;

[0068] FIG33 is a partial enlarged view of portion J of FIG32;

[0069] FIG34 is a cross-sectional view taken along line HH of FIG29;

[0070] FIG35 is a partial enlarged view of portion K of FIG34;

[0071] Explanation of main reference numerals: 1. Relay; 2. Accommodating part; 3. Magnetic circuit part; 4. Electronic control part; 5a. First partition; 5b. Second partition; 6. Housing; 7. Cover; 8. Contact cavity; 9a. First mounting slot; 9b. Second mounting slot; 10a. First positioning slot; 10b. Second positioning slot; 11. Coil assembly; 12. Armature assembly; 13. Coil frame; 14. Coil winding; 15. Signal input terminal; 16. Iron core; 17. Yoke; 18. Shielding cover; 19. First yoke; 20. Second yoke; 21. Magnetic drive end; 22, first magnetic drive end; 23, second magnetic drive end; 24, permanent magnet; 25, armature; 26, first permanent magnet; 27, second permanent magnet; 28, first magnetic pole; 29, second magnetic pole; 30, first armature; 31, second armature; 32, parts that intersect each other; 33, suction part; 34, first suction part; 35, second suction part; 36, third suction part; 37, fourth suction part; 38, push card; 39, connecting part; 40, contact unit; 41, magnetic conductor group; 42, elastic member group; 43, Limiting member; 44, accommodating portion; 45, connecting portion; 46, connecting column group; 47, connecting column; 48, slot; 49, connecting end; 50, first connecting end; 51, second connecting end; 52, contact member group; 53, moving contact member group; 54, static contact member group; 55, moving contact; 56, overcurrent bridge; 57, moving contact; 58, first moving contact; 59, second moving contact; 60, static contact; 61, first static contact; 62, second static contact; 63, static contact; 64, first static contact; 65, second static contact; 66, First magnetic conductor group; 67, second magnetic conductor group; 68, first magnetic conductor; 69, second magnetic conductor; 70, main body; 71, extension portion; 72, elastic member; 73, connecting frame; 74, elastic support portion; 75, elastic arm; 76, connecting hole; 77, limiting portion; 78, assembly portion; 79, avoidance hole; 80, protrusion; 81, first assembly hole; 82, second assembly hole; 83, arc control moving contact; 84, other moving contacts; L, contact stroke; L1, first contact stroke; L2, second contact stroke; M, overstroke. Specific embodiments

[0072] In the claims and the specification, except for the embodiments, unless otherwise specified, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" simply mean that a feature having one of the aforementioned directions is perpendicular to a feature having another of the aforementioned directions, and do not require that the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments be implemented. In the embodiments, the X-axis direction is perpendicular to both the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into left and right, the Y-axis direction can be divided into front and back, and the Z-axis direction can be divided into up and down.

[0073] In the claims and the description, unless otherwise defined, the terms "first", "second" or "third", etc. are intended to distinguish different objects rather than to describe a specific order.

[0074] In the claims and the specification, unless otherwise specified, the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are based on the directions and positional relationships shown in the accompanying drawings and are only for the convenience of simplifying the description, and do not imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction.

[0075] In the claims and description, unless otherwise specified, the terms "fixed connection" or "fixed connection" or "relatively fixed" should be understood in a broad sense, that is, any connection method without any displacement relationship or relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0076] In the claims and the description, unless otherwise defined, the terms "include", "have" and their variations mean "including but not limited to".

[0077] In the claims and the description, unless otherwise defined, the term "provided with" means that the technical feature thereafter is part of the technical feature therefor.

[0078] In the claims and description, unless otherwise specified, the term "contact stroke" refers to the distance between the moving contact point and the corresponding static contact point of the moving contact along the Y-axis direction when the moving contact group moves away from the static contact group.

[0079] In the claims and description, unless otherwise specified, the term "overtravel" refers to the travel of the armature assembly and the push card continuing to move along the Y-axis direction after the moving contacts of all moving contacts of the contact group contact the corresponding static contacts.

[0080] In the claims and the specification, unless otherwise defined, the term “temporarily formed” means that the polarity of the magnetic driving end formed by the pulse electric signal disappears as the pulse electric signal disappears.

[0081] In the claims and specification, unless otherwise specified, the term "reversal" means that when the current direction of the pulsed electrical signal received by the coil assembly is different from the current direction of the pulsed electrical signal received last time, the polarity of the temporarily formed magnetic drive end is opposite to the polarity of the previously temporarily formed magnetic drive end. Of course, those skilled in the art will understand that for a magnetic latching relay, if the current direction of the pulsed electrical signal received by the coil assembly is the same as the current direction of the pulsed electrical signal received last time, the received pulsed electrical signal has no control significance and the relay state will not change.

[0082] In the claims and description, unless otherwise defined, the term "inverted arrangement" means that the posture of adjacent connecting members is obtained by rotating the posture of the connecting member 180 degrees around a rotation axis extending along the Y-axis direction.

[0083] The technical solutions in the embodiments will be described clearly and completely below with reference to the accompanying drawings.

[0084] Referring to Figures 1 and 2, Figures 1 and 2 illustrate relay 1 in this embodiment. Relay 1 is used to receive electrical signals to control the on / off state of an external circuit. Specifically, relay 1 in this embodiment is a magnetic latching relay that controls the on / off state of the external circuit by receiving pulsed electrical signals. In this embodiment, the pulsed electrical signals can be divided into a first pulsed electrical signal and a second pulsed electrical signal. The first pulsed electrical signal is correspondingly used to control the on / off state of the external circuit, and the second pulsed electrical signal is correspondingly used to control the off / off state of the external circuit. Upon receiving the first pulsed electrical signal, relay 1 switches from the off state to the on state. After the first pulsed electrical signal disappears, relay 1 remains in the on state until it receives the second pulsed electrical signal. Upon receiving the second pulsed electrical signal, relay 1 switches from the on state to the off state. After the second pulsed electrical signal disappears, relay 1 remains in the off state until it receives the first pulsed electrical signal. In this embodiment, the external circuit is three-phase alternating current. Relay 1 needs to control the on / off state of all three phases simultaneously. In other embodiments, relay 1 may not be a magnetic latching relay.

[0085] As shown in FIG. 2 , in this embodiment, the relay 1 includes a receiving component 2 , a magnetic circuit portion 3 , an electric control portion 4 , two first separators 5 a and two second separators 5 b .

[0086] Referring to Figures 1, 3, and 4, these illustrate the accommodating member 2 in this embodiment. In this embodiment, the accommodating member 2 houses the magnetic circuit portion 3, the electronic control portion 4, a first partition 5a, and a second partition 5b. As in the prior art, the accommodating member 2 is made of insulating material. In this embodiment, it is formed using plastic injection molding. As shown in Figure 1, the accommodating member 2 includes a housing 6 and a cover 7.

[0087] The shell 6 is used to accommodate the magnetic circuit part 3, the electronic control part 4 and the partition 5. As shown in Figure 3, the shell 6 is provided with three contact cavities 8 at the front along the Y-axis direction. The three contact cavities 8 are arranged along the X-axis direction. A first mounting groove 9a is provided between adjacent contact cavities 8. The number of the first mounting grooves 9a is two. Each first mounting groove 9a is open upward and is used to install the corresponding first partition 5a. Second mounting grooves 9b are provided on the outer side of the contact cavities 8 on both sides along the X-axis direction. The number of the second mounting grooves 9b is two. Each second mounting groove 9b is open upward and is used to install the corresponding second partition 5b.

[0088] The cover 7 is used to cover the upward opening of the housing 6 along the Z-axis direction. The cover 7 is fixedly connected to the housing 6. In this embodiment, the cover 7 is snap-fitted to the housing 6. As shown in Figure 4, the surface of the cover 7 facing the housing 6 is provided with two first positioning grooves 10a and two second positioning grooves 10b. The two first positioning grooves 10a correspond to the two first mounting grooves 9a along the Z-axis direction and are used to position the corresponding first dividers 5a. The two second positioning grooves 10b correspond to the two second mounting grooves 9b along the Z-axis direction and are used to position the corresponding second dividers 5b.

[0089] Referring to Figure 5 , it illustrates the magnetic circuit portion 3 of this embodiment. This portion receives pulsed electrical signals and, in response to these signals, drives some components of the electronic control portion 4 to linearly move relative to other components along the Y-axis, enabling the electronic control portion 4 to control the conduction or discontinuation of an external circuit. As shown in Figure 5 , the magnetic circuit portion 3 includes a coil assembly 11 and an armature assembly 12.

[0090] Referring to FIG. 6 , FIG. 6 illustrates the coil assembly 11 of this embodiment. As shown in FIG. 6 , the coil assembly 11 includes a coil frame 13, a coil winding 14, a signal input terminal 15, an iron core 16, two yokes 17, and a shield 18. The coil frame 13 is fixedly attached to the housing 6. The coil frame 13 extends along the X-axis and has a center hole extending along the X-axis. The coil frame 13 has retaining walls at both ends along the X-axis. The coil winding 14 is wound around the coil frame 13 and positioned between the two retaining walls. Therefore, the axis of the coil winding 14 also extends along the X-axis. The two connection terminals of the coil winding 14 are connected to two signal input terminals 15, which are used to receive pulsed electrical signals. The two signal input terminals 15 are fixedly attached to the retaining walls of the coil frame 13 and extend through the housing 6 along the Z-axis. The iron core 16 is positioned within the center hole of the coil frame 13 and extends along the X-axis. The two yokes 17 are both made of a magnetically conductive material. The two yokes 17 are respectively a first yoke 19 and a second yoke 20. The two yokes 17 are respectively fixed to the two ends of the iron core 16, and the other ends of the two yokes 17 away from the iron core 16 form a magnetic drive end 21. The two magnetic drive ends 21 are respectively a first magnetic drive end 22 and a second magnetic drive end 23, wherein the first magnetic drive end 22 is formed on the first yoke 19 and the second magnetic drive end 23 is formed on the second yoke 20. In this embodiment, the two yokes 17 are both L-shaped, with the ends of their longer arms fixed to the ends of the iron core 16, and their shorter arms extend toward each other to form the magnetic drive ends 21. The two magnetic drive ends 21 are arranged along the X-axis direction and extend along the X-axis direction to limit the forward movement of the armature assembly 12 from the first position to the second position along the Y-axis direction, and also to limit the backward movement of the armature assembly 12 from the second position to the first position along the Y-axis direction. The shielding cover 18 is fixed relative to the coil frame 13 and is made of paramagnetic material. In this embodiment, the shielding cover 18 covers the rest of the coil assembly 11. The shielding cover 18 is used to prevent the cooperation between the coil assembly 11 and the armature assembly 12 from being disturbed by the external magnetic field, and also to prevent the magnetic field formed between the coil assembly 11 and the armature assembly 12 from being disturbed by the external environment.

[0091] In this embodiment, the coil assembly 11 is stimulated by a pulsed electrical signal to reverse the temporarily formed polarity of the two magnetic drive ends 21. "Temporarily formed" in this embodiment means that the polarity of the magnetic drive ends 21 formed by the pulsed electrical signal disappears as the pulsed electrical signal disappears. "Reversed" in this embodiment means that when the current direction of the pulsed electrical signal received by the coil assembly 11 is different from the current direction of the pulsed electrical signal received last time, the polarity of the temporarily formed magnetic drive ends 21 is opposite to the polarity of the previously temporarily formed magnetic drive ends 21. In this embodiment, as previously described, the pulsed electrical signal can be divided into a first pulsed electrical signal and a second pulsed electrical signal. The first pulsed electrical signal is correspondingly used to control the conduction of an external circuit, and the second pulsed electrical signal is correspondingly used to control the shutdown of an external circuit. In this embodiment, the first pulsed electrical signal and the second pulsed electrical signal are electrical pulses with opposite current directions. In this embodiment, for ease of description, it is assumed that the coil winding 14 is excited by the first pulsed electrical signal to form a first magnetic field, and the first magnetic drive end 22 temporarily has a north polarity, while the second magnetic drive end 23 temporarily has a south polarity. After the first pulse electrical signal disappears, the first magnetic drive end 22 and the second magnetic drive end 23 no longer have the polarity generated by the first magnetic field. Instead, the coil winding 14 is excited by the second pulse electrical signal to form a second magnetic field, which temporarily causes the first magnetic drive end 22 to have an S-pole polarity and the second magnetic drive end 23 to have an N-pole polarity. After the second pulse electrical signal disappears, the first magnetic drive end 22 and the second magnetic drive end 23 no longer have the polarity generated by the second magnetic field.

[0092] Referring to FIG. 7 , FIG. 7 shows the armature assembly 12 in this embodiment. The armature assembly 12 is driven by the coil assembly 11 to move along the Y-axis direction, and its movement can be divided into movement from a rearward first position to a forward second position and movement from a forward second position to a rearward first position. When the armature assembly 12 moves to the first position, the relay 1 is in the off state, and the electrical connection between the external three-phase AC power source and the load is disconnected. When the armature assembly 12 moves to the second position, the relay 1 is in the on state, and the electrical connection between the external three-phase AC power source and the load is connected. As shown in FIG. 7 , in this embodiment, the armature assembly 12 includes two permanent magnets 24 and two armatures 25. Both permanent magnets 24 are formed of magnetized magnetic steel. In other embodiments, the two permanent magnets 24 can also be made of other permanent magnetic materials, such as neodymium iron boron permanent magnets. In this embodiment, the two permanent magnets 24 are respectively a first permanent magnet 26 and a second permanent magnet 27. In this embodiment, each of the two permanent magnets 24 has two magnetic poles with fixed polarity, namely a first magnetic pole 28 and a second magnetic pole 29. The first magnetic pole 28 and the second magnetic pole 29 have opposite polarities. The first magnetic poles 28 of the two permanent magnets 24 have the same polarity. In this embodiment, for ease of description, the first magnetic pole 28 is assumed to be an N pole, and the second magnetic pole 29 is assumed to be an S pole. In this embodiment, the two permanent magnets 24 are arranged along the X-axis. The two magnetic poles of each permanent magnet 24 are arranged along the Y-axis. Specifically, the first magnetic pole 28 of the first permanent magnet 26 is located in front of the Y-axis, and the second magnetic pole 29 is located in the back of the Y-axis. The first magnetic pole 28 of the second permanent magnet 27 is located in the back of the Y-axis, and the second magnetic pole 29 is located in front of the Y-axis. The two armatures 25 are respectively a first armature 30 and a second armature 31. The first armature 30 is fixedly connected to the first magnetic poles 28 of the two permanent magnets 24, and the second armature 31 is fixedly connected to the second magnetic poles 29 of the two permanent magnets 24. The projections of the two armatures 25 on a first projection plane perpendicular to the Z-axis intersect, and the intersecting portions 32 are spaced apart along the Z-axis. Each armature 24 is provided with two engaging portions 33 at its ends along the X-axis. The first armature 30 is provided with a first engaging portion 34 and a second engaging portion 35 at its ends along the X-axis, with the first engaging portion 34 being on the left side along the X-axis and at the front along the Y-axis, while the second engaging portion 35 is on the right side along the X-axis and at the rear along the Y-axis. The second armature 31 is provided with a third engaging portion 36 and a fourth engaging portion 37 at its ends along the X-axis, with the third engaging portion 36 being on the right side along the X-axis and at the front along the Y-axis, while the fourth engaging portion 37 is on the left side along the X-axis and at the rear along the Y-axis. In this embodiment, the armature assembly 12 extends entirely along the X-axis, and its dimension along the X-axis is greater than its dimension along the Y-axis.

[0093] 8 to 14 , which illustrate the operating principle of the magnetic circuit portion 3 in this embodiment.

[0094] As shown in Figure 8 , in this embodiment, the armature assembly 12 is positioned along the X-axis between the two long arms connecting the yoke 17 and the core 16. The first magnetic drive end 22 is positioned along the Y-axis between the first and fourth engaging portions 34 and 37, while the second magnetic drive end 23 is positioned along the Y-axis between the third and second engaging portions 36 and 35.

[0095] FIG8 shows the state of the magnetic circuit portion 3 when the armature assembly 12 is in the first position and in the magnetic holding state. As shown in FIG8 , when the armature assembly 12 is in the first position and in the magnetic holding state, the first engaging portion 34 engages the first magnetic drive end 22, and the third engaging portion 36 engages the second magnetic drive end 23.

[0096] Figure 9 shows the state of the magnetic circuit portion 3 when the coil assembly 11 in this embodiment has just received the first pulse electrical signal. At this time, the coil winding 14 is excited by the first pulse electrical signal to generate a first magnetic field, causing the first magnetic drive end 22 to temporarily have an N-pole polarity and the second magnetic drive end 23 to temporarily have an S-pole polarity. Since the first magnetic drive end 22 and the first attraction portion 34 have the same polarity and are both N-pole, the first magnetic drive end 22 generates a magnetic repulsive force on the first attraction portion 34; since the second magnetic drive end 23 and the third attraction portion 36 have the same polarity and are both S-pole, the second magnetic drive end 23 generates a magnetic repulsive force on the third attraction portion 36, causing the coil assembly 11 to push the armature assembly 12 from the first position to the second position along the Y-axis direction.

[0097] FIG10 illustrates the state of the magnetic circuit portion 3 in this embodiment when the armature assembly 12 is driven by the coil assembly 11 to move until all movable contacts 57 in the electronically controlled portion 4 contact their corresponding stationary contacts 63 (described in detail later). At this point, gaps exist between the fourth engaging portion 37 and the first magnetic drive end 22, and between the second engaging portion 35 and the second magnetic drive end 23. These gaps provide the armature assembly 12 with an overtravel M. The so-called overtravel M is the distance within which the armature assembly 12 can continue to move forward after all movable contacts 57 contact the stationary contacts 63, until it reaches the second position.

[0098] FIG11 shows the state of the magnetic circuit portion 3 when the armature assembly 12 moves to the second position in this embodiment. During the process of the armature assembly 12 experiencing the overtravel M and moving to the second position, the first magnetic drive end 22 limits the movement of the fourth attraction portion 37 along the Y-axis direction, so that the fourth attraction portion 37 attracts the first magnetic drive end 22; the second magnetic drive end 23 limits the movement of the second attraction portion 35 along the Y-axis direction, so that the second attraction portion 35 attracts the second magnetic drive end 23. As shown in FIG11, when the armature assembly 12 just moves to the second position, the first pulse electrical signal and the first magnetic field have not yet disappeared, the first magnetic drive end 22 still temporarily has the N-pole polarity, and the second magnetic drive end 23 still temporarily has the S-pole polarity.

[0099] FIG12 illustrates the state of the magnetic circuit portion 3 when the armature assembly 12 is in the second position and in the magnetically held state. As shown in FIG12 , after the first pulsed electrical signal disappears, the first magnetic field disappears, and the first magnetic drive end 22 and the second magnetic drive end 23 no longer have the polarity generated by the first magnetic field. However, the fourth engaging portion 37 still engages the first magnetic drive end 22, and the second engaging portion 35 still engages the second magnetic drive end 23.

[0100] FIG13 shows the state of the magnetic circuit portion 3 when the coil assembly 11 in this embodiment has just received the second pulse electrical signal. As shown in FIG13 , at this time, the coil winding 14 is excited by the second pulse electrical signal to generate a second magnetic field, causing the first magnetic drive end 22 to temporarily have an S-pole polarity and the second magnetic drive end 23 to temporarily have an N-pole polarity. Since the first magnetic drive end 22 and the fourth attraction portion 37 have the same polarity and are both S-poles, the first magnetic drive end 22 generates a magnetic repulsive force on the fourth attraction portion 37; since the second magnetic drive end 23 and the second attraction portion 35 have the same polarity and are both N-poles, the second magnetic drive end 23 generates a magnetic repulsive force on the second attraction portion 35, causing the coil assembly 11 to push the armature assembly 12 from the second position to the first position along the Y-axis direction.

[0101] Figure 14 shows the state of the magnetic circuit portion 3 when the armature assembly 12 moves to the first position in this embodiment. During the movement of the armature assembly 12 from the second position to the first position, the first magnetic drive end 22 limits the movement of the first engaging portion 34 along the Y-axis from the second position to the first position, causing the first engaging portion 34 to engage the first magnetic drive end 22. The second magnetic drive end 23 limits the movement of the third engaging portion 36 along the Y-axis from the second position to the first position, causing the third engaging portion 36 to engage the second magnetic drive end 23.

[0102] When the second pulse signal disappears, the second magnetic field disappears, and the first magnetic drive end 22 and the second magnetic drive end 23 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 12 is in the magnetic holding state at the first position as shown in FIG8 .

[0103] Referring to Figure 15 , it illustrates the electronic control unit 4 in this embodiment. This unit is used to control the on / off switching of external circuits. In this embodiment, it controls the on / off switching of three-phase AC power. As shown in Figure 15 , the electronic control unit 4 includes a push card 38, three connectors 39, a contact unit 40, three magnetic conductor groups 41, three elastic member groups 42, and three position limiting members 43.

[0104] Referring to Figure 16 , FIG16 shows the push card 38, the armature assembly 12, and the three connecting members 39 in this embodiment. The push card 38 is driven by the magnetic circuit portion 3 to move along the Y-axis. As shown in FIG16 , in this embodiment, the push card 38 is integrally formed with the armature assembly 12 and the three connecting members 39 by insert injection molding. The push card 38 includes a housing 44 for accommodating the armature assembly 12 and a connecting portion 45 for accommodating the connecting members 39 and mounting and supporting the movable contact assembly 53. The housing 44 and the connecting portion 45 are integrally connected. When the armature assembly 12 is accommodated in the housing 44, the entire armature assembly 12, except for the four engaging portions 33, is enclosed within the housing 44. The housing 44 has a larger dimension along the X-axis than along the Y-axis. In this embodiment, the four engaging portions 33 extend from the housing 44 along the X-axis and are configured to interact with the two magnetic drive ends 21. The connecting portion 45 extends along the X-axis. Along the X-axis, the accommodating portion 44 is located midway between the connecting portion 45. Three connecting post groups 46 are provided on the forward-facing connecting surface of the connecting portion 45. These groups 46 are arranged along the X-axis and face the corresponding contact cavity 8. Each connecting post group 46 includes two connecting posts 47. These two connecting posts 47 are arranged along the Z-axis. Slots 48 are provided between adjacent connecting post groups 46, allowing the first separator 5a to be inserted along the Y-axis.

[0105] Referring to Figures 16 and 17 , these illustrate the three connecting members 39 in this embodiment. As shown in Figure 16 , all three connecting members 39 are integrally molded with the push card 38 through insert injection molding. As shown in Figure 17 , the three connecting members 39 are arranged along the X-axis. The connecting members 39 are used to connect to corresponding stoppers 43 to secure the stoppers 43 relative to the push card 38. The position of each connecting member 39 along the X-axis is identical to the position of the connecting column assembly 46 along the X-axis. In this embodiment, the three connecting members 39 are identical in shape. Each connecting member 39 extends along the Z-axis. The ends of the connecting members 39 extend out of the push card 38 to form two connecting ends 49. These two connecting ends 49 have different shapes, namely a first connecting end 50 and a second connecting end 51. In this embodiment, in the two connecting members 39 located on either side of the X-axis, the first connecting end 50 is at the top and the second connecting end 51 is at the bottom. In the connecting member 39 located in the middle of the X-axis, the first connecting end 50 is at the bottom and the second connecting end 51 is at the top. Therefore, the positions of the two connection ends 49 of adjacent connection members 39 along the Z-axis direction are reversed.

[0106] Referring to Figure 18 , FIG18 illustrates the contact unit 40 in this embodiment. In this embodiment, the contact unit 40 is used to implement on / off control of three-phase alternating current. As shown in FIG18 , the contact unit 40 includes three contact groups 52. The three contact groups 52 are arranged along the X-axis and are located in corresponding contact cavities 8. Each contact group 52 includes a movable contact group 53 and a stationary contact group 54, which are arranged opposite each other along the Y-axis. The movable contact group 53 is adapted to contact or move away from the stationary contact group 54 along the Y-axis to correspondingly switch one phase of the three-phase alternating current on or off. Each movable contact group 53 includes two movable contacts 55 arranged along the Z-axis. The two movable contacts 55 are connected in parallel when the movable contact group 53 contacts the stationary contact group 54. The two movable contacts 55 are spaced apart along the Z-axis. Each movable contact 55 is provided with a current bridge 56 and two movable contacts 57. The current bridge 56 extends along the X-axis and is made of a highly conductive metal. The two moving contacts 57 are arranged along the X-axis and are both made of a highly conductive metal. They are fixedly connected to the overcurrent bridge 56 and located on either side of the overcurrent bridge 56 facing the front of the static contact assembly 54 along the X-axis. The two moving contacts 57 are a first moving contact 58 and a second moving contact 59, with the first moving contact 58 located on the left side along the X-axis and the second moving contact 59 located on the right side along the X-axis. When the moving contact assembly 53 contacts the static contact assembly 54, current flows from one moving contact 57 through the overcurrent bridge 56 to the other moving contact 57. The static contact assembly 54 is used to electrically connect to one phase of the three-phase alternating current and is fixedly connected to the housing 6. Each static contact assembly 54 includes two static contacts 60 corresponding to the two moving contacts 57. The two static contacts 60 are arranged along the X-axis and connected to the power supply and the load, respectively. The two static contacts 60 are a first static contact 61 and a second static contact 62. The first stationary contact 61 is located on the left side along the X-axis and opposite the first movable contact 58 along the Y-axis. The second stationary contact 62 is located on the right side along the X-axis and opposite the second movable contact 59 along the Y-axis. Both stationary contacts 60 are provided with stationary contacts 63 corresponding to the movable contacts 57. The first stationary contact 61 is provided with two first stationary contacts 64, which correspond to the two first movable contacts 58 of the two movable contacts 55 and are opposite each other along the Y-axis. The second stationary contact 62 is provided with two second stationary contacts 65, which correspond to the two second movable contacts 59 of the two movable contacts 55 and are opposite each other along the Y-axis. When the moving contact group 53 contacts the static contact group 54 along the Y-axis direction, the two static contacts 60 are turned on through the two moving contacts 55, so that the power supply and the load are turned on. As mentioned above, the two moving contacts 55 are connected in parallel at this time; when the moving contact group 53 moves away from the static contact group 54 along the Y-axis, the two moving contacts 55 move away from the two static contacts 60 along the Y-axis direction, so that the power supply and the load are turned off.

[0107] Referring to Figures 19 and 20 , these illustrate the magnet assembly 41 in this embodiment. The magnet assembly 41 is used to prevent the movable contact assembly 53 from separating from the stationary contact assembly 54 when the relay 1 is struck by a high fault current, thereby preventing a destructive arc from being drawn between the movable contact 57 and the stationary contact 63. In this embodiment, there are three magnet assemblies 41, arranged along the X-axis. Each magnet assembly 41 corresponds to a contact assembly 52. ​​As shown in Figure 19 , each magnet assembly 41 includes a first magnet assembly 66 and a second magnet assembly 67. The first magnet assembly 66 is fixed relative to the movable contact assembly 53, and the second magnet assembly 67 is fixed relative to the stationary contact assembly 54. As shown in Figure 20 , the first magnet assembly 66 includes two first magnets 68 spaced apart along the Z-axis. Each first magnet 68 has a main body 70 and two extensions 71. The main body 70 extends along the Z-axis direction and is located on the back side of the overcurrent bridge 56 away from the static contact group 54. Two extensions 71 extend forward along the Y-axis direction from both ends of the main body 70 along the Z-axis direction, and respectively span the top and bottom of the overcurrent bridge 56. In this embodiment, the first magnet 68 is fixed to the corresponding overcurrent bridge 56. As shown in Figure 19, the second magnet group 67 includes a second magnet 69, which is wrapped in an insulator formed by the shell 6 and is located between the two static contacts 63. In this embodiment, the second magnet 69 extends along the Z-axis direction. When the dynamic contact group 53 contacts the static contact group 54 along the Y-axis direction, the front end of the extension 71 approaches the second magnet 69 along the Y-axis direction.

[0108] Referring to FIG. 20 , FIG. 20 shows the elastic member group 42 in this embodiment. The number of elastic member groups 42 is the same as that of the movable contact member groups 53 and they correspond one-to-one to each other. In this embodiment, there are three elastic member groups 42 and they are arranged along the X-axis direction. The elastic member group 42 is located between the push card 38 and the movable contact member group 53 along the Y-axis direction, and stores energy when the movable contact member group 53 contacts the static contact member group 54, and releases energy when the movable contact member group 53 moves away from the static contact member group 54. The elastic member group 42 includes at least one elastic member 72. The elastic member 72 may be the same as the number of the movable contacts 55 in the corresponding movable contact member group 53 and correspond one-to-one to each other, or may be different and not correspond one-to-one to each other. In this embodiment, there is one elastic member 72 in each elastic member group 42. The elastic member 72 is provided with a connecting frame 73 and at least one elastic support portion 74 that are connected to each other as a whole. The connecting frame 73 is fixed relative to the push card 38 and is provided with a connecting hole 76. The number of connecting holes 76 and the number of connecting columns 47 in the corresponding connecting column group 46 are the same and correspond one to one with each other. In this embodiment, the number of connecting holes 76 is two and they are arranged along the Z-axis direction. The connecting columns 47 and the connecting holes 76 slide together along the Y-axis direction to limit the movement of the connecting frame 73 perpendicular to the Y-axis direction. In this embodiment, the two connecting columns 47 are inserted into the two connecting holes 76, so that the connecting frame 73 has no degree of freedom in all directions except the degree of freedom along the Y-axis direction. In this embodiment, the elastic support portion 74 of each elastic member 72 is the same as the number of dynamic contacts 55 in the corresponding dynamic contact group 53 and correspond one to one with each other. Of course, the number may also be different and not correspond one to one. In this embodiment, the number of elastic support portions 74 is two and they are arranged along the Z-axis direction. Each dynamic contact 55 is mounted on the corresponding elastic support portion 74. In this embodiment, each elastic support portion 74 includes two elastic arms 75. The two elastic arms 75 extend from opposite sides of the connecting frame 73 along the X-axis and are at least partially inclined along the Y-axis away from the push card 38. The free ends of the two elastic arms 75 are respectively fixedly connected to the back surface of the current bridge 56. The fixed positions of the two elastic arms 75 are located behind the first movable contact 58 and the second movable contact 59 along the Y-axis.

[0109] Referring to Figures 20 and 21 , three limiters 43 are shown in this embodiment. The limiters 43 are the same number as the movable contact groups 53 and correspond one-to-one with each other. In this embodiment, there are three limiters 43, arranged along the X-axis. The limiters 43 are fixedly connected to the corresponding connecting members 39, thereby securing the limiters 43 relative to the push card 38. When the movable contact group 53 is separated from the stationary contact group 54, the limiters 43 abut against each movable contact 55 in the corresponding movable contact group 53 along the Y-axis, thereby limiting the contact travel L of each movable contact 55. The contact travel L of a movable contact 55 is the distance between the movable contact point 57 of the movable contact 55 and the corresponding stationary contact point 63 when the movable contact group 53 is separated from the stationary contact group 54. Furthermore, by abutting against each movable contact 55 along the Y-axis, the limiters 43 secure the connecting frame 73 of the elastic member group 42 relative to the push card 38 along the Y-axis. As shown in Figure 20, in this embodiment, the three limiting members 43 have exactly the same shape. As shown in Figure 21, the limiting member 43 is provided with a limiting portion 77 and two assembly portions 78. The limiting portion 77 is used to limit the contact stroke L of each moving contact 55 in the moving contact group 53. Specifically, the limiting portion 77 is suitable for abutting each moving contact 55 backward along the Y-axis direction when the moving contact group 53 is away from the static contact group 54. The limiting portion 77 extends along the Z-axis direction and is provided with three avoidance holes 79. The three avoidance holes 79 are arranged along the Z-axis direction and are used for each extension portion 71 of the first conductive magnet group 66 to extend along the Y-axis direction. The portion between adjacent avoidance holes 79 forms an abutment portion, which is suitable for abutting the moving contact 55 along the Y-axis direction. In this embodiment, one of the two abutment portions is provided with a protrusion 80. As shown in Figure 20, in this embodiment, the protrusion 80 is stamped and formed so that the limiting portion 77 forms a recess at the position of the protrusion 80 toward the front of the static contact assembly 54. As shown in Figure 21, two assembly portions 78 extend from the limiting portion 77 along the Y-axis direction at both ends along the Z-axis direction. One of the two assembly portions 78 is provided with a first assembly hole 81, and the other is provided with a second assembly hole 82. The first assembly hole 81 and the second assembly hole 82 have different shapes. The first assembly hole 81 is suitable for adapting to and fixing with the first connecting end 50, and the second assembly hole 82 is suitable for adapting to and fixing with the second connecting end 51. In this embodiment, the second assembly hole 82 is closer to the protrusion 80 along the Z-axis direction. As shown in Figure 20, in this embodiment, the first assembly holes 81 of the two stoppers 43 on either side along the X-axis are positioned at the top, and the second assembly holes 82 at the bottom, to mate with and securely engage the corresponding connectors 39, and position the protrusions 80 at a lower position. The stopper 43 located in the middle along the X-axis has its first assembly hole 81 at the bottom and its second assembly hole 82 at the top, to mate with and securely engage the corresponding connector 39, and position the protrusions 80 at a higher position. In this embodiment, the movable contacts 55 not suitable for being abutted by the protrusions 80 are referred to as arc-control movable contacts 83, while the movable contacts suitable for being abutted by the protrusions 80 are referred to as other movable contacts 84.As can be seen, in the two movable contact groups 53 located on either side along the X-axis, the arc-control movable contact 83 is located above the other movable contacts 84 along the Z-axis; and in the movable contact group 53 located in the middle along the X-axis, the arc-control movable contact 83 is located below the other movable contacts 84 along the Z-axis. As a result, the positions of the arc-control movable contacts 83 along the Z-axis are different between adjacent movable contact groups 53.

[0110] Referring to Figures 22 to 26 and 29, the first and second separators 5a and 5b of this embodiment are shown. As shown in Figures 23 to 25, the first and second separators 5a and 5b are both made of high-temperature resistant insulating materials. Specifically, in this embodiment, both are made of ceramic. The first separator 5a is used to separate adjacent contact groups 52 along the X-axis to prevent arcs formed by adjacent contact groups 52 from contacting each other. In this embodiment, the first separator 5a is fixed to the housing 6 and secured between the first mounting slot 9a and the first positioning slot 10a. The second separator 5b is fixed to the housing and secured between the second mounting slot 9b and the second positioning slot 10b. As shown in Figure 26, the first separator 5a is positioned between two adjacent contact groups 52 along the X-axis. When the movable contact group 53 is away from the stationary contact group 54, the first separator 5a is inserted into the corresponding slot 48 of the push card 38 along the Y-axis. As shown in FIG29 , when the moving contact group 53 contacts the static contact group 54, the first separator 5a extends further along the Y-axis into the slot 48 corresponding to the push card 38, lengthening the conduction path between adjacent contact groups 52 to make it more difficult for the arc formed by adjacent contact groups 52 to contact each other. As shown in FIG26 and FIG29 , the two second separators 5b are located on both sides of the contact unit 40 along the X-axis. When the contact groups 52 located on both sides of the contact unit 40 along the X-axis strike an arc, the second separators 5b can block the arc and prevent the arc from damaging other external components. In other embodiments, the first separator 5a can also be fixedly connected to the push card 38, while the slot 48 is set on the housing 6. The effect is basically the same as in this embodiment. In other embodiments, the second separator 5b can also be fixedly connected to the push card 38.

[0111] Referring to Figures 26 to 28 , these illustrate the state of the contact unit 40 when the armature assembly 12 is in the first position in this embodiment. As shown in Figure 28 , when the armature assembly 12 is in the first position, the movable contact assembly 53 is spaced away from the stationary contact assembly 54 along the Y-axis. At this time, the stopper 43 pushes backward along the Y-axis against two movable contacts 55 in the corresponding movable contact assembly 53. The other movable contacts 84 are pressed against by the protrusion 80, resulting in a greater distance between their first movable contact points 58 and first stationary contacts 64, forming a first contact stroke L1. The arc-control movable contact 83 is not pressed against by the protrusion 80, resulting in a closer distance between its first movable contact point 58 and first stationary contact 64, forming a second contact stroke L2. In this embodiment, the difference between the first contact stroke L1 and the second contact stroke L2 is less than the overtravel M of the push latch 38 and the armature assembly 12.

[0112] When the movable contact assembly 53 is driven by the push card 38 toward the stationary contact assembly 54 along the Y-axis, because the second stroke L2 is smaller than the first stroke L1, the arc-control movable contact 83 first contacts the two stationary contacts 60. When the arc-control movable contact 83 contacts the two stationary contacts 60, the two stationary contacts 60 are electrically connected via the arc-control movable contact 83.

[0113] When the push card 38 continues to approach the static contact assembly 54 along the Y-axis direction, causing the other movable contacts 84 to also contact the two static contacts 60, the limiter 43 moves forward and no longer presses against the arc control movable contact 83. The elastic support portion 74 connected to the arc control movable contact 83 is compressed and stores energy.

[0114] After that, the armature assembly 12 and the push card 38 drive the limit member 43 to continue to move forward along the Y-axis direction into the overtravel M, the limit member 43 no longer presses against other movable contacts 84, and the elastic support part 74 connected to other movable contacts 84 is also compressed and stores energy.

[0115] Referring to Figures 29 to 33, Figures 29 to 33 illustrate the state of the contact unit 40 when the armature assembly 12 is in the second position. When the fourth suction portion 37 and the second suction portion 35 are respectively limited by the two magnetic drive ends 21, the overtravel M of the armature assembly 12 and the push card 38 ends and is in the second position. As shown in Figure 31, when the armature assembly 12 is in the second position, the movable contact group 53 contacts the static contact group 54 along the Y-axis direction, and the second movable contact points 59 of the two movable contacts 55 both abut the second static contact 65. As shown in Figure 33, at this time, the two movable contacts 55 in the same movable contact group 53 are not abutted by the limiting member 43, the two elastic support portions 74 in the same elastic member group 42 have the same compression stroke, and the two elastic support portions 74 apply the same elastic force to the corresponding movable contacts 55.

[0116] Referring to Figures 34 and 35 , these illustrate the state of the magnet assembly 41 when the armature assembly 12 is in the second position. As shown in Figure 35 , at this point, since the current flowing through the overcurrent bridge 56 is in the X-axis direction, a magnetic circuit is formed between the first magnet 68 and the second magnet 69, causing the first magnet 68 and the second magnet 69 to attract each other. The greater the current, the greater the attraction between the first magnet 68 and the second magnet 69. Furthermore, as mentioned above, since the elastic forces acting on the two movable contacts 55 are the same, the forces acting on the two movable contacts 55 and the two stationary contacts 60 are also the same, making it difficult for the two movable contacts 55 to separate from the two stationary contacts 60.

[0117] When the movable contact assembly 53 is driven by the push card 38 to move away from the static contact assembly 54 along the Y-axis direction, the limiting member 43 first moves backward along the Y-axis direction until the protrusion 80 hits the other movable contacts 84. During this process, the two elastic support parts 74 stretch and release energy.

[0118] As the push card 38 continues to move away from the static contact group 54 along the Y-axis direction, the protrusion 80 drives the other dynamic contacts 84 to separate from the two static contacts 60. At this time, since the arc-control dynamic contact 83 is still in contact with the two static contacts 60, no arc will be drawn between the other dynamic contacts 84 and the two static contacts 60. During this process, the elastic support part 74 connected to the arc-control dynamic contact 83 continues to stretch and release energy.

[0119] As the push card 38 continues to move away from the static contact group 54 along the Y-axis, the limiter 43 abuts the arc-control movable contact 83 and drives it to separate from the two static contacts 60. At this time, an arc is drawn between the two movable contacts 57 of the arc-control movable contact 83 and the corresponding static contacts 63. Because the first static contact 61 and the second static contact 62 are connected by the arc and the arc-control movable contact 83, and the current directions on both sides along the X-axis are opposite, the arc is affected by the repulsive Lorentz force and extends to both sides along the X-axis. Because the arc-control movable contacts 83 in the two adjacent dynamic contact groups 53 are located at different positions along the Z-axis, the arcs drawn by the two adjacent contact groups 52 are not easily contacted. Due to the obstruction of the first separator 5a, the arcs drawn by the two adjacent contact groups 52 are even less likely to contact each other, and short circuits between different phases are not easily prevented.

[0120] As the push card 38 continues to move away from the static contact assembly 54 along the Y-axis direction, the two movable contacts 55 move away from the static contact assembly 54 and the arc is extinguished until the armature assembly 12 is in the first position as shown in FIG. 26 .

[0121] In this embodiment, since the movable contacts 55 in the same movable contact group 53 are suitable for parallel connection, by providing an arc-control movable contact 83 with a shorter contact stroke L, the arc-control movable contact 83 is disconnected from the stationary contact group 54 later than the other movable contacts 84. As a result, arcing occurs at the arc-control movable contact 83 and is less likely to occur at the other movable contacts 84. Because the arc-control movable contacts 83 of adjacent movable contact groups 53 are positioned differently along the Z-axis, when arcs overflow to the sides along the X-axis, the arcs generated by adjacent contact groups 52 are misaligned along the Z-axis, making contact less likely. This reduces the likelihood of short circuits between out-of-phase devices.

[0122] In this embodiment, the limiting member 43 fixed relative to the push card 38 abuts against each movable contact member 55 to limit the contact stroke L of each movable contact member 55 , thereby making it easier to control the contact stroke L of each movable contact member 55 .

[0123] In this embodiment, because the difference between the second contact travel L2 of the arc-control movable contact 83 and the first contact travel L1 of the other movable contacts 84 is less than the overtravel M of the push card 38, when the overtravel M ends, all movable contacts 55 are subjected to the same elastic force from the elastic member assembly 42. When the relay 1 is in the on state and subjected to a high fault current, all movable contacts 55 are unlikely to disengage from the static contact assembly 54, thereby ensuring the load capacity of the relay 1.

[0124] In this embodiment, by providing a protrusion suitable for abutting against other movable contacts 84 on the limiting member 43 , the other movable contacts 84 are further away from the static contact assembly 54 than the arc-control movable contact 83 in the disconnected state.

[0125] In this embodiment, the connecting member 39 and the pushing card 38 are integrally formed by insert injection molding, so that the limiting member 43 is more easily fixed relative to the pushing card 38, and the limiting member 38 is more rigid, which has a better limiting effect on the movable contact member 55.

[0126] In this embodiment, by making the shapes of the two ends of the same connecting member 39 different, it is possible to form a fool-proof design by setting the positions of the two ends of adjacent connecting members 39 upside down along the Z-axis direction when the shapes of the connecting members 39 are exactly the same and the shapes of the limiting members 43 are exactly the same. When there are two moving contacts 55 in each moving contact group 53, it is possible to ensure that the positions of the arc-control moving contacts 83 along the Z-axis direction are different from each other between adjacent moving contact groups 53.

[0127] In this embodiment, the first separator 5a separates adjacent contact groups 52, and the first separator 5a can be inserted into the slot 48 along the Y-axis direction. The conduction path between adjacent contact groups 52 is lengthened. Therefore, when an arc is drawn between the moving contact group 53 and the static contact group 55, the arcs of adjacent contact groups 52 are less likely to contact and conduct, so short circuit problems are less likely to occur between different phases.

[0128] In this embodiment, a second separator 5b is provided on both sides of the contact unit 40 along the X-axis. When the two contact groups 52 located on the outermost sides along the X-axis direction pull an arc, the second separator 5b can block the arc, so that the arc is not likely to cause damage to other components located on the outer side of the contact unit 40 along the X-axis direction, thereby increasing the service life of the relay 1.

[0129] In this embodiment, the first separator 5a and the second separator 5b are both made of high-temperature resistant insulating material, which can increase the service life of the first separator 5a, the second separator 5b and the relay 1 when the current is large.

[0130] Compared to a swing-type magnetic latching relay, the relay 1 in this embodiment converts the armature assembly 12's swing motion relative to the coil assembly 11 into linear motion. Therefore, there is no loss of the radial component of the swing stroke of a swing-type magnetic latching relay. This allows for greater space utilization in the relay 1, creating a more favorable condition for increasing the safe distance between the moving contact 55 and the stationary contact 60 in a limited space.

[0131] Compared with other direct-acting magnetic latching relays, the relay 1 in this embodiment does not require a long length in one direction (whether it is the X-axis direction or the Y-axis direction) because the two magnetic drive ends 21 are arranged along the X-axis direction, and the linear motion direction of the armature assembly 12 is the Y-axis direction perpendicular to the X-axis direction. This allows the relay 1 to adapt more easily to limited space and create more favorable conditions for increasing the safety distance between the moving contact 55 and the static contact 60 in a limited space.

[0132] In this embodiment, by providing the magnetic conductor group 41 , when the relay 1 is impacted by a large fault current, the movable contact group 53 is less likely to separate from the static contact group 54 , thereby avoiding destructive arcing caused by the separation of the two, and increasing the voltage resistance and life of the relay 1 .

[0133] The above description of the specification and embodiments is used to explain the scope of protection of the present application, but does not constitute a limitation on the scope of protection of the present application.

Claims

1. A contact unit, wherein: The invention comprises at least two contact groups (52) arranged along the X-axis direction; the contact group (52) comprises a movable contact group (53) and a stationary contact group (54) arranged relatively along the Y-axis direction; each movable contact group (53) is provided with at least two movable contacts (55) suitable for parallel connection along the Z-axis direction, and part of each movable contact (55) is an arc-control movable contact (83); the arc-control movable contact (83) has a shorter contact stroke (L) along the Y-axis direction than the other movable contacts (84), so that the arc-control movable contact (83) is disconnected from the stationary contact group (54) later than the other movable contacts (84); the positions of the arc-control movable contacts (83) along the Z-axis direction are different between adjacent movable contact groups (53).

2. A contact unit according to claim 1, wherein: The movable contact (55) is provided with two movable contacts (57) along the X-axis direction; the static contact group (54) includes two static contacts (60) corresponding to the two movable contacts (57); the static contact (60) is provided with a static contact (63) corresponding to the movable contact (57); the contact stroke (L) of the movable contact (55) is the distance between the movable contact (57) and the corresponding static contact (63) of the movable contact (55) when the movable contact group (53) moves away from the static contact group (54) along the Y-axis direction.

3. A contact unit according to claim 1, wherein: The number of the contact element groups (52) is three.

4. An electric control part, which is used to control the on and off of an external circuit, wherein: It comprises a push card (38), an elastic member group (42), a limiting member (43) and a contact unit (40) as described in any one of claims 1 to 3; the elastic member group (42) and the limiting member (43) are the same in number as the movable contact member group (53) and correspond to each other one by one; the elastic member group (42) is located between the push card (38) and the movable contact member group (53) along the Y-axis direction; the limiting member (43) is fixed relative to the push card (38) and abuts against each movable contact member (55) along the Y-axis direction when the movable contact member group (53) is away from the static contact member group (54) to limit the contact stroke (L) of each movable contact member (55).

5. An electric control part according to claim 4, wherein: The push card (38) has an overtravel (M), and the difference between the contact travel (L) of the arc-control moving contact (83) and the contact travel (L) of the other moving contacts (84) is smaller than the overtravel (M) of the push card (38).

6. An electric control part according to claim 5, wherein: The limiting member (43) is provided with a protrusion (80) suitable for abutting against all other movable contact members (84).

7. An electric control part according to claim 6, wherein: It also includes connecting members (39) of the same number as the limiting members (43) and connected one to another; each of the connecting members (39) and the pushing card (38) is formed by insert injection molding; the two ends of the connecting member (39) along the Z-axis direction extend out of the pushing card (38), and the limiting member (43) is adapted and fixedly connected to the two ends of the connecting member (39).

8. An electric control part according to claim 7, wherein: The number of the movable contacts (55) in each movable contact group (53) is two; the two ends of the same connecting member (39) have different shapes, and the two ends of adjacent connecting members (39) are arranged inverted.

9. A relay, wherein: It comprises a receiving part (2), a magnetic circuit part (3) and an electric control part (4) as claimed in any one of claims 4 to 8; the magnetic circuit part (3) drives the pushing card (38) to move along the Y-axis direction.

10. A relay as claimed in claim 9, wherein: It also includes a first separator (5a); the first separator (5a) separates adjacent contact member groups (52) along the X-axis direction; one of the accommodating member (2) and the pushing card (38) is fixedly connected to the first separator (5a), and the other is provided with a slot (48) for the first separator (5a) to be inserted along the Y-axis direction.

11. A relay as claimed in claim 10, wherein: It also includes a second separator (5b); the second separator (5b) is located on both sides of the contact unit (40) along the X-axis direction; the second separator (5b) is fixedly connected to the accommodating member (2) or the pushing card (38).

12. A relay as claimed in claim 11, wherein: The first partition (5a) and the second partition (5b) are made of high-temperature resistant insulating material.

13. A relay as claimed in claim 9, wherein: The magnetic circuit part (3) includes an armature assembly (12); the armature assembly (12) moves along the Y-axis direction; the push card (38) and the armature assembly (12) are integrally formed by insert injection molding.

14. A relay as claimed in claim 13, wherein: The push card (38) comprises a receiving portion (44) and a connecting portion (45); the receiving portion (44) is used to receive the armature assembly (12), the connecting portion (45) is used to install and carry the movable contact assembly (53), and the connecting portion (45) extends along the X-axis direction.

15. A moving component according to claim 14, wherein: One side of the accommodating portion (44) along the Y-axis direction is connected to the middle position of the connecting portion (45) along the X-axis direction.

16. A moving component according to claim 13, wherein: The magnetic circuit part (3) further comprises a coil assembly (11), wherein the coil assembly (11) is provided with two magnetic drive ends (21), and the two magnetic drive ends (21) are used to drive the armature assembly (12) to move along the Y-axis direction.

17. A relay as claimed in claim 16, wherein: The armature assembly (12) includes a permanent magnet (24) and two armatures (25), the two armatures (25) are respectively fixed to the two magnetic poles of the permanent magnet (24), the two armatures (25) are respectively a first armature (30) and a second armature (31), the first armature (30) is provided with a first suction portion (34) and a second suction portion (35), and the second armature (31) is provided with a third suction portion (36) and a fourth suction portion (37); the armature (25) moves along the Y-axis direction between a first position and a second position; in the first position, the first suction portion (34) and the third suction portion (36) are respectively suctioned or close to the two magnetic drive ends (21), and in the second position, the fourth suction portion (37) and the second suction portion (35) are respectively suctioned or close to the two magnetic drive ends (21).

18. A relay as claimed in claim 17, wherein: The coil assembly (11) includes a coil winding (14), the coil winding (14) extends along the X-axis direction, and the two magnetic drive ends (21) are arranged along the X-axis direction; the projections of the first armature (30) and the second armature (31) on a first projection plane perpendicular to the Z-axis direction intersect with each other, and the intersecting parts (32) are arranged at intervals along the Z-axis direction.

19. A relay as claimed in claim 9, wherein: The invention also includes at least two magnet groups (41), each magnet group (41) corresponds to a contact group (52), and each magnet group (41) includes a first magnet group (66) and a second magnet group (67). The first magnet group (66) is fixed relative to the moving contact group (53), and the second magnet group (67) is fixed relative to the static contact group (54). When current flows through the moving contact group (53), a magnetic circuit is formed between the first magnet group (66) and the second magnet group (67), and the magnets attract each other.

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