Relay and ammeter

Abstract

The invention discloses a relay and an electricity meter. The relay comprises an armature assembly, a pushing card, a static contact group, a movable contact group and an anti-short circuit unit. The armature assembly moves in the Y-axis direction, the pushing card and an armature assembly insert are integrally formed in an injection molding mode, the static contact piece set is provided with a reverse overcurrent part, the movable contact piece set is arranged on the pushing card and abuts against or is away from the static contact piece set in the Y-axis direction, and the overcurrent direction of the movable contact piece set is opposite to the overcurrent direction of the reverse overcurrent part in the X-axis direction. The anti-short-circuit unit comprises a first magnetizer group fixed relative to the movable contact group and a second magnetizer group fixed relative to the static contact group, the first magnetizer group and the second magnetizer group form a magnetic loop when the movable contact group is over-current, and at least part of the second magnetizer group is located between the movable contact group and the reverse over-current part in the Y-axis direction. By adopting the technical scheme, compared with a relay in the prior art, when the relay is impacted by fault large current, the movable contact group and the static contact group are more difficult to separate.

Description

[0001] This application is a divisional application of Chinese patent application 202410316486.3 (filing date is March 19, 2024, and the name of the invention is “A contact part, a relay and an electric meter”). Technical Field

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

[0003] The contact part in the prior art includes a moving contact group and a stationary contact group. The moving contact group may include one or more moving contacts, and the stationary contact group may include one or more stationary contacts. The moving contact group is suitable for contacting or moving away from the stationary contact group to control the on and off of the external circuit. In the prior art, there is already an anti-short circuit unit, which includes a first magnetic conductive group fixed relative to the moving contact group and a second magnetic conductive group fixed relative to the stationary contact group. The first magnetic conductive group and the second magnetic conductive group are arranged along the moving direction of the moving contact group. When the moving contact group is overcurrent, the current passing through the moving contact group forms a magnetic circuit between the first magnetic conductive group and the second magnetic conductive group, and the magnetic circuit forms a magnetic attraction between the first magnetic conductive group and the second magnetic conductive group. The magnetic attraction increases with the increase of the current value passing through the moving contact group. The anti-short circuit unit is mainly used to prevent the moving contact group and the stationary contact group from being separated from each other due to the magnetic repulsion formed by the contraction current between the contacts when the relay is impacted by a large fault current. The separation of the moving contact group and the stationary contact group under a large fault current will produce a destructive arc.

[0004] However, the existing contact part may still cause the moving contact group and the stationary contact group to separate due to a large fault current, thereby generating a destructive arc. Summary of the invention

[0005] The purpose of the present application is to overcome the above-mentioned defects or problems existing in the background technology and to provide a relay and an electric meter, in which, compared with the prior art, the moving contact group and the static contact group are less likely to separate under a large fault current.

[0006] In order to achieve the above purpose, the following technical solutions are adopted:

[0007] The first technical scheme relates to a relay, which includes: an armature assembly, which moves along the Y-axis direction; a push card, which is integrally formed with the armature assembly insert by injection molding; a static contact group, which is provided with a reverse current flow portion; a moving contact group, which is the same in number and corresponds to the static contact group, the moving contact group is arranged on the push card and is carried by the push card to contact or move away from the static contact group along the Y-axis direction, the current flow direction of the moving contact group is opposite to the current flow direction of the reverse current flow portion along the X-axis direction; and an anti-short circuit unit, which includes a first magnetic conductive group fixed relative to the moving contact group and a second magnetic conductive group fixed relative to the static contact group, the first magnetic conductive group and the second magnetic conductive group form a magnetic circuit when the moving contact group flows, so that the first magnetic conductive group and the second magnetic conductive group form an attraction force along the Y-axis direction; the second magnetic conductive group is at least partially located between the moving contact group and the reverse current flow portion along the Y-axis direction.

[0008] The second technical solution is based on the first technical solution, wherein the static contact group includes two static contacts arranged along the X-axis direction, and the reverse current flow portion is formed on one of the two static contacts; the moving contact group includes at least one moving contact, and the moving contact is suitable for contacting or moving away from the two static contacts and is provided with a current flow bridge extending along the X-axis direction; the second magnetic conductor group is at least partially located between the current flow bridge and the reverse current flow portion.

[0009] The third technical solution is based on the second technical solution, wherein the number of the moving contact groups is at least two, each moving contact group is arranged along the X-axis direction, and each stationary contact group is arranged along the X-axis direction.

[0010] The fourth technical solution is based on the third technical solution, wherein the number of the moving contact groups is three.

[0011] The fifth technical solution is based on the second technical solution, wherein the movable contact group includes at least two movable contacts, and each movable contact is arranged at intervals along the Z-axis direction.

[0012] The sixth technical solution is based on the second technical solution, wherein the first magnetic conductive group and the second magnetic conductive group are arranged along the Y-axis direction.

[0013] The seventh technical solution is based on the second technical solution, wherein the first magnetic conductor group includes at least one first magnetic conductor, the first magnetic conductor is provided with a body, and the body is located on the back side of the current bridge away from the static contact group.

[0014] The eighth technical solution is based on the seventh technical solution, wherein the first magnetic conductor is further provided with an extension portion, the extension portion extends from the main body along the Y-axis direction, and when the moving contact group contacts the static contact group, the extension portion approaches the second magnetic conductor group along the Y-axis direction.

[0015] The ninth technical solution is based on the second technical solution, wherein the two stationary contacts are respectively provided with stationary contact points, and the second magnetic conductive body group is located between the stationary contact points of the two stationary contacts along the X-axis direction.

[0016] The tenth technical solution is based on the first technical solution, and further includes a coil assembly, wherein 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.

[0017] The eleventh technical solution is based on the second technical solution, wherein the pushing card includes a receiving portion and a connecting portion; the receiving portion is used to receive the armature assembly, and the connecting portion is used to install and carry the moving contact assembly.

[0018] The twelfth technical solution is based on the eleventh technical solution, wherein the number of the movable contact groups is at least two, each movable contact group is arranged along the X-axis direction, and the connecting portion extends along the X-axis direction.

[0019] The thirteenth technical solution is based on the twelfth technical solution, wherein, along the X-axis direction, the accommodating portion is located in the middle position relative to the connecting portion; in each longitudinal section of the pushing card perpendicular to the Y-axis direction, the dimension of the longitudinal section located in the accommodating portion along the X-axis direction is the smallest among the dimensions of each longitudinal section of the pushing card along the X-axis direction.

[0020] The fourteenth technical solution is based on the second technical solution, and it also includes an elastic bracket group, the number of the elastic bracket groups is the same as and corresponds to the number of the moving contact groups, the elastic bracket group is arranged on the pushing card, when the moving contact group contacts the static contact group, the elastic bracket group stores energy, and when the moving contact group moves away from the static contact group, the elastic bracket group releases energy.

[0021] The fifteenth technical solution is based on the fourteenth technical solution, wherein the elastic bracket group includes an elastic bracket, the elastic bracket includes a bracket body and an elastic support part which are connected to each other as a whole, the bracket body is fixed relative to the pushing card, the elastic support part is the same in number and corresponds to the corresponding moving contacts in the moving contact group, and each moving contact in the moving contact group is installed on the corresponding elastic support part.

[0022] The sixteenth technical solution is based on the fifteenth technical solution, wherein the elastic support portion includes two elastic arms, and both of the two elastic arms are fixedly connected to the current bridge.

[0023] The seventeenth technical solution is based on the sixteenth technical solution, wherein the moving contact is provided with two moving contacts along the X-axis direction, and the positions where the two elastic arms are fixed to the overcurrent bridge are respectively located on the back of the corresponding moving contacts.

[0024] The eighteenth technical solution is based on the fifteenth technical solution, and it also includes a limit member, which is the same in number and corresponds to the moving contact group. The limit member is fixed relative to the push card and abuts against each moving contact along the Y-axis direction when the corresponding moving contact group is away from the static contact group to limit the distance between each moving contact and the static contact group.

[0025] The nineteenth technical solution is based on the eighteenth technical solution, wherein the pushing card is provided with a limiting portion, and the bracket body is provided with an adaptor portion, the limiting portion and the adaptor portion slide together along the Y-axis direction and limit the movement of the bracket body perpendicular to the Y-axis direction; the limiting member limits the bracket body along the Y-axis direction by abutting against each moving contact member.

[0026] The twentieth technical solution is based on the second technical solution, and further comprises a receiving member, wherein the receiving member receives the armature assembly, the pushing member, the stationary contact member group, the moving contact member group and the anti-short circuit unit, and the stationary contact member group is fixedly connected to the receiving member.

[0027] The twenty-first technical solution is based on the twentieth technical solution, wherein, in the static contact group, two of the static contacts extend out of the front surface of the accommodating member along the Y-axis direction respectively.

[0028] The twenty-second technical solution is based on the twentieth technical solution, wherein the two static contacts are respectively a first static contact and a second static contact; the second static contact is provided with a seventh flow portion, the seventh flow portion extends along the Y-axis direction and extends out of the accommodating member; the seventh flow portion is perpendicular to the Z-axis direction.

[0029] The twenty-third technical solution is based on the twenty-second technical solution, wherein the seventh current passing part is suitable for installing a mutual inductor.

[0030] The twenty-fourth technical solution is based on the twenty-third technical solution, wherein the first static contact is provided with a first static contact point, a first current passing portion and a second current passing portion; the first static contact point is fixedly connected to the first current passing portion; the second current passing portion extends from the side of the first current passing portion away from the second static contact point along the X-axis direction along the Y-axis direction and extends out of the accommodating member, and the second current passing portion is perpendicular to the X-axis direction.

[0031] The twenty-fifth technical solution is based on the twenty-fourth technical solution, wherein the first flow-through portion extends along the Z-axis direction.

[0032] The twenty-sixth technical solution is based on the twenty-fifth technical solution, wherein the first static contact is also provided with a third flow portion and a fourth flow portion, the third flow portion extending from one end of the second flow portion along the Y-axis direction away from the first flow portion and along the X-axis direction away from the second static contact; the fourth flow portion extends from the bottom end of the third flow portion along the Z-axis direction and along the Y-axis direction away from the first flow portion.

[0033] The twenty-seventh technical solution is based on the twenty-third technical solution, wherein the reverse current portion is arranged on the second static contact, and the second static contact is also provided with a second static contact point, a fifth current portion and a sixth current portion; the second static contact point is fixedly connected to the fifth current portion; the sixth current portion extends from the side of the fifth current portion close to the first static contact along the X-axis direction and away from the moving contact group along the Y-axis direction; the reverse current portion extends from one end of the sixth current portion away from the fifth current portion along the Y-axis direction and close to the first static contact along the X-axis direction; the seventh current portion extends from the reverse current portion along the Y-axis direction.

[0034] The twenty-eighth technical solution is based on the twentieth technical solution, wherein the accommodating member is provided with a first guide portion; a second guide portion is provided in the middle of the pushing card along the X-axis direction; and the first guide portion and the second guide portion are slidably matched along the Y-axis direction.

[0035] The twenty-ninth technical solution is based on the twenty-eighth technical solution, wherein one of the first guide portion and the second guide portion is a guide groove extending along the Y-axis direction, and the other is a guide protrusion extending along the Z-axis direction, and the guide protrusion is inserted into the guide groove and slides relative to the guide groove along the Y-axis direction.

[0036] The thirtieth technical solution is based on the twentieth technical solution, and further comprises a guide member, which extends along the Y-axis direction; one of the pushing card and the accommodating member is fixedly connected to the guide member, and the other one of the two is slidably matched with the guide member along the Y-axis direction.

[0037] The thirty-first technical solution is based on the thirtieth technical solution, wherein the accommodating member is provided with a mating portion group corresponding to the guide member, each mating portion group includes at least two mating portions, and each mating portion in the same mating portion group is arranged along the Y-axis direction; the position where the guide member and the push card are slidingly mated or fixedly connected is located between the two mating portions of the corresponding mating portion group along the Y-axis direction.

[0038] The thirty-second technical solution is based on the thirtieth technical solution, wherein the number of the guide members is two.

[0039] The thirty-third technical solution is based on the thirty-second technical solution, wherein the two guide members are respectively located on both sides of the pushing card along the X-axis direction.

[0040] The thirty-fourth technical solution is based on the twentieth technical solution, and it also includes a micro switch, which is provided with a movable spring and a fixed contact piece, the fixed contact piece is fixedly connected to the accommodating piece, the pushing card is provided with a pushing portion, the movable spring is suitable for being pushed by the pushing portion and deformed to abut against the fixed contact piece, and restores the deformation and moves away from the fixed contact piece when the pushing portion moves away.

[0041] The thirty-fifth technical solution is based on the twentieth technical solution, and further includes an elastic member, which is mounted on the accommodating member, and which stores energy when the moving contact group moves away from the static contact group and releases energy when the moving contact group moves toward the static contact group.

[0042] The thirty-sixth technical solution is based on the thirty-fifth technical solution, wherein the number of the elastic members is two, and the two elastic members are respectively located on both sides of the pushing card along the X-axis direction.

[0043] The thirty-seventh technical solution is based on the twentieth technical solution, and it also includes a barrier portion, wherein the accommodating member is provided with contact cavities whose number is the same as and corresponds to the number of moving contact groups, and the contact cavities are used for the corresponding moving contact groups to contact or move away from the static contact groups therein; the barrier portion extends along the Y-axis direction; the barrier portion is made of insulating material and is located between adjacent contact cavities.

[0044] The thirty-eighth technical solution is based on the thirty-seventh technical solution, wherein when the moving contact group contacts the stationary contact group, the blocking part separates adjacent contact cavities.

[0045] The thirty-ninth technical solution is based on the twentieth technical solution, wherein the accommodating member is provided with an accommodating cavity, and the second magnetic conductive body group is fixedly connected in the accommodating cavity.

[0046] The 40th technical solution relates to an electric meter, which includes a relay as described in any one of the first to thirty-ninth embodiments.

[0047] Compared with the prior art, the above solution has the following beneficial effects:

[0048] In the application, the push card and the armature assembly insert are integrally molded by injection molding, which avoids the possible errors in the assembly process of the armature assembly and the push card, and also makes the push card and the armature assembly more integrated, with fewer parts, which is conducive to making full use of limited space. It can also better convert the motion stroke of the armature assembly along the Y-axis direction into the motion stroke of the moving contact, avoiding the loss of driving force and motion stroke.

[0049] In the present application, the push card is installed and carried by each movable contact group. Therefore, when the movable contact group is arranged along the X-axis direction, it can avoid the problem of jamming or the reduction of life due to severe wear.

[0050] In the present application, in addition to the anti-short circuit unit in the prior art, a second magnetic conductor group is also arranged between the moving contact group and the reverse current flow portion. The current flow direction of the reverse current flow portion is opposite to the current flow direction of the moving contact group along the X-axis direction. Therefore, the magnetic field generated by it has the same direction of magnetic flux lines on the side where the second magnetic conductor group is located as the magnetic field generated by the current bridge on the side where the second magnetic conductor group is located, which strengthens the magnetic field strength of the second magnetic conductor group, making the magnetic attraction between the second magnetic conductor group and the first magnetic conductor group stronger. Compared with the prior art, the moving contact group and the static contact group are less likely to separate under large fault currents. It should be noted that the two moving contact groups and the static contact groups with opposite current flow directions are generally prone to form magnetic repulsion, so this is generally a design that needs to be avoided. However, since the second magnetic conductor group is arranged between the moving contact group and the static contact group, the magnetic repulsion caused by the opposite current flow direction is well weakened, which helps to increase the magnetic attraction, which is an important innovation of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solution of the embodiment, the following briefly introduces the drawings required for use:

[0052] Figure 1 is a three-dimensional exploded view of a relay in the embodiment;

[0053] Figure 2 is a three-dimensional exploded view of the housing in the embodiment;

[0054] Figure 3 is a three-dimensional diagram of the bottom shell in the embodiment;

[0055] Figure 4 A top view of the magnetic circuit portion in the embodiment;

[0056] Figure 5 is a three-dimensional exploded view of the coil assembly in the embodiment;

[0057] Figure 6 is a three-dimensional diagram of an armature assembly in an embodiment;

[0058] Figure 7 is a front view of the armature assembly in the embodiment;

[0059] Figure 8 A top view of the armature assembly in the embodiment;

[0060] Fig. 9 is a schematic diagram of a magnetic circuit portion when the armature assembly is in a magnetic holding state at the first position in the embodiment;

[0061] Fig.10 It is a schematic diagram of the magnetic circuit part when the coil assembly just receives the first pulse electrical signal in the embodiment;

[0062] Fig.11is a schematic diagram of the magnetic circuit portion when the armature assembly is driven by the coil assembly to move to the second position in the embodiment;

[0063] Fig.12 is a schematic diagram of a magnetic circuit portion when the armature assembly is in a magnetic holding state at the second position in the embodiment;

[0064] Fig.13 is a schematic diagram of the magnetic circuit portion when the coil assembly just receives the second pulse electrical signal in the embodiment;

[0065] Fig.14 Schematic diagram of the magnetic circuit portion when the armature assembly of the embodiment is driven by the coil assembly to move to the first position;

[0066] Fig.15 It is a three-dimensional exploded view of the moving parts in the embodiment;

[0067] Fig.16 is a top view of a pushing unit in the embodiment;

[0068] Fig.17 It is a left view of the pushing unit in the embodiment;

[0069] Fig.18 is a three-dimensional diagram of a pushing unit in the embodiment;

[0070] Fig.19 is a three-dimensional diagram of a moving contact unit in an embodiment;

[0071] Fig. 20 A three-dimensional diagram of a position limiting member in an embodiment;

[0072] Fig.21 is a top view of the moving parts in the embodiment;

[0073] Fig. 22 is a three-dimensional diagram of a static contact assembly in an embodiment;

[0074] Fig.23 It is a schematic diagram of the structure of the contact part in the embodiment;

[0075] Fig.24 A schematic diagram of the contact portion of the relay in the conducting state in the embodiment;

[0076] Fig.25 A schematic diagram of a relay in an on state in an embodiment;

[0077] Fig.26 for Fig.25 It is the AA section view;

[0078] Fig. 27 for Fig.26 A partial enlarged view of part B;

[0079] Fig.28 A schematic diagram of a relay in an off state in an embodiment;

[0080] Fig.29 for Fig.28 A partial enlarged view of the C part;

[0081] Fig.30 is a three-dimensional diagram of the elastic member and the guide member in the embodiment;

[0082] Fig.31 for Fig.25 DD section view;

[0083] Fig.32 is a front view of the micro switch in the embodiment;

[0084] Fig.33 It is a stereogram of the relay and the mutual inductor in the embodiment.

[0085] Description of main reference numerals:

[0086] 1. Relay; 2. Accommodating part; 3. Magnetic circuit part; 4. Pushing part; 5. Contact part; 6. Guide part; 7. Elastic part; 8. Micro switch; 9. Coil assembly; 10. Armature assembly; 11. Contact member group; 12. Anti-short circuit unit; 13. Moving contact member group; 14. Static contact member group; 15. First magnetic conductive member group; 16. Second magnetic conductive member group; 17. Moving part; 18. Shell; 19. Cover; 20. Bottom shell; 21. Blocking member; 22. Accommodating chamber; 23. Protrusion; 24. Coil accommodating chamber; 25. Partition chamber; 26. First guide part; 27. Matching part group; 28. Matching part; 29. ​​Contact chamber; 30. Blocking part; 31. Coil frame; 32. Coil winding; 33. Iron core; 34. Yoke; 35. Shielding member; 36, signal input terminal; 37, first yoke; 38, second yoke; 39, magnetic drive end; 40, first magnetic drive end; 41, second magnetic drive end; 42, permanent magnet; 43, armature; 44, first permanent magnet; 45, second permanent magnet; 46, first magnetic pole; 47, second magnetic pole; 48, first armature; 49, second armature; 50, suction part; 51, first suction part; 52, second suction part; 53, third suction part; 54, fourth suction part; 55, parts intersecting each other; 56, narrower section; 57, wider section; 58, push card; 59, connecting member; 60, elastic bracket group; 61, limit member; 62, push unit; 63, moving contact unit; 64, accommodating part; 65, connecting part; 66. abutment portion; 67. second guide portion; 68. mounting hole; 69. position-limiting portion group; 70. position-limiting portion; 71. clamping portion; 72. moving contact; 73. overcurrent bridge; 74. moving contact point; 75. first moving contact point; 76. second moving contact point; 77. first magnetic conductor; 78. body; 79. extension portion; 80. elastic bracket; 81. bracket body; 82. elastic support portion; 83. adapter portion; 84. elastic arm; 85. abutment portion; 86. mounting portion; 87. avoidance hole; 88. clamping hole; 89. stationary contact; 90. stationary contact point; 91. load terminal; 92. first stationary contact; 93. second stationary contact; 94. first stationary contact; 95. first overcurrent portion; 96. second overcurrent portion; 97. third overcurrent portion; 98, fourth current flow portion; 99, first load terminal; 100, second static contact; 101, fifth current flow portion; 102, sixth current flow portion; 103, reverse current flow portion; 104, seventh current flow portion; 105, second load terminal; 106, second magnetic conductor; 107, insulator; 108, fixed portion; 109, first bending portion; 110, push surface; 111, avoidance groove; 112, fixed contact piece; 113, moving spring; 114, signal output terminal; 115, fixed portion; 116, second bending portion; 117, bridge portion; 118, mutual inductor; A1, first closed magnetic circuit; A2, second closed magnetic circuit; B1: first push magnetic circuit; B2: second push magnetic circuit; A3, third closed magnetic circuit;A4, fourth closed magnetic circuit; B3, third driving magnetic circuit; B4, fourth driving magnetic circuit; F1, first driving force; F2, second driving force; K, current direction; L, first magnetic field; M, second magnetic field; P, first air gap; Q, second air gap; U, first projection plane; V, interval; W, symmetry plane; X, X-axis; Y, Y-axis; Z, Z-axis direction. ; DETAILED DESCRIPTION

[0087] In the claims and the specification except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the feature with one of the above directions is perpendicular to the feature with another direction, and do not require that they must be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction. Among them, 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 top and bottom.

[0088] 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.

[0089] In the claims and the specification, unless otherwise defined, terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the 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.

[0090] In the claims and the specification, unless otherwise defined, the term "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method in which there is no displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0091] In the claims and the description, unless otherwise defined, the terms "includes", "has" and their variations mean "including but not limited to".

[0092] In the claims and the specification, unless otherwise defined, the term "provided with" means that the technical feature located thereafter is a part of the technical feature located therefor.

[0093] 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.

[0094] In the claims and the specification, unless otherwise specified, the term "reversal" means that when the current direction of the pulse electrical signal received by the coil component this time is different from the current direction of the pulse electrical signal received last time, the polarity of the magnetic drive end temporarily formed this time is opposite to the polarity of the magnetic drive end temporarily formed last time. Of course, those skilled in the art should understand that for a magnetic latching relay, if the current direction of the pulse electrical signal received by the coil component this time is the same as the current direction of the pulse electrical signal received last time, the pulse electrical signal received this time has no control significance, and the state of the relay will not change.

[0095] In the claims and the specification, unless otherwise defined, the term "magnetic conductive cross section" refers to the cross section of the armature perpendicular to its magnetic conductive path in the magnetic field.

[0096] In the claims and the specification, unless otherwise defined, the term "back side" refers to the side facing away from the stationary contact assembly.

[0097] In the claims and the specification, unless otherwise defined, the term "mounted" means connected directly or indirectly to each other.

[0098] In the claims and the specification, unless otherwise defined, the term "support" means that the weight of an object will act on another object.

[0099] In the claims and the specification, unless otherwise defined, the term “directly connected as one body” means that there are no other parts between the two and they are directly connected.

[0100] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings.

[0101] Example

[0102] Relay 1 is used to receive electrical signals to control the on and off of an external circuit. Specifically, the relay 1 in this embodiment is a magnetic latching relay, which controls the on and off of an external circuit by receiving a pulse electrical signal. In this embodiment, the pulse electrical signal can be divided into a first pulse electrical signal and a second pulse electrical signal. The first pulse electrical signal is correspondingly used to control the conduction of the external circuit, and the second pulse electrical signal is correspondingly used to control the off of the external circuit. After receiving the first pulse electrical signal, relay 1 switches from the off state to the on state. After the first pulse electrical signal disappears, relay 1 remains in the on state until the second pulse electrical signal is received; after receiving the second pulse electrical signal, relay 1 switches from the on state to the off state. After the second pulse electrical signal disappears, relay 1 remains in the off state until the first pulse electrical signal is received. In this embodiment, the external circuit is three-phase alternating current. Relay 1 needs to control the on and off of the three phases at the same time.

[0103] See also Figure 1 , Figure 1 Schematic diagram showing the structure of the relay 1 in this embodiment. Figure 1 As shown, the relay 1 includes a receiving part 2, a magnetic circuit part 3, a pushing part 4, a contact part 5, a guide part 6, an elastic part 7 and a micro switch 8.

[0104] Among them, the magnetic circuit part 3 includes a coil assembly 9 and an armature assembly 10. The contact part 5 includes a contact piece group 11 and an anti-short circuit unit 12, the number of the contact piece group 11 is at least one, and the number of the anti-short circuit unit 12 is the same as and corresponds to the contact piece group 11. Each contact piece group 11 includes a moving contact piece group 13 and a static contact piece group 14. Each anti-short circuit unit 12 includes a first magnetic conductor group 15 and a second magnetic conductor group 16. Since the present embodiment needs to control the simultaneous on and off of three phases, in the present embodiment, the number of the contact piece groups 11 is three. In the present embodiment, the armature assembly 10, the pushing part 4, the moving contact piece group 13 and the first magnetic conductor group 15 constitute a moving component 17, and the moving component 17 is the main component that moves relative to the accommodating part 2.

[0105] For the convenience of introduction, the introduction order of this embodiment is as follows: the accommodating part 2, the magnetic circuit part 3, the moving part 17, the static contact member group 14, the second magnetic conductor group 16, the contact part 5, the guide member 6, the elastic member 7 and the micro switch 8, and finally the working principle of the relay 1 is summarized.

[0106] The accommodating member 2 is used to accommodate the magnetic circuit component 3, the pushing part 4, the contact part 5, the guide member 6, the elastic member 7 and the micro switch 8. The accommodating member 2 should also be regarded as the movement reference of the moving part 17, that is, in this embodiment, the movement is all relative to the accommodating member 2. As in the prior art, the accommodating member 2 is made of insulating material, and in this embodiment, it is made of plastic injection molding.

[0107] like Figure 1 As shown, the receiving member 2 includes a housing 18 and a cover 19. In this embodiment, the housing 18 is used to accommodate and install the magnetic circuit component 3, the pushing portion 4, the contact portion 5, the guide member 6, the elastic member 7 and the micro switch 8. The "installation" in this embodiment means directly or indirectly connected to each other.

[0108] See also Figure 2 and Figure 3 , Figure 2 and Figure 3 The housing 18 in this embodiment is shown. Figure 2As shown, the housing 18 includes a bottom shell 20 and a blocking member 21. The bottom shell 20 is provided with three accommodating cavities 22 at the front along the Y-axis direction, and the three accommodating cavities 22 are arranged along the X-axis direction. The accommodating cavities 22 are used to accommodate the second magnetic conductive body group 16. The accommodating cavities 22 are provided with openings along the Z-axis direction, and the openings are located on the bottom surface of the bottom shell 20 away from the cover body 19. In this embodiment, two signal input terminals 36 and two signal output terminals 114 extend from the bottom surface of the bottom shell 19 along the Z-axis direction, respectively. The two signal input terminals 36 are used to receive pulse electrical signals, and the two signal output terminals 114 are used to send relay state signals to the relay state sensing circuit.

[0109] like Figure 2 As shown, in this embodiment, the number of the blocking members 21 and the accommodating cavities 22 are the same and corresponding, and the blocking members 21 are fixed to the bottom shell 20 and used to cover the openings of the corresponding accommodating cavities 22 so that the second magnetic conductive body group 16 is fixed in the accommodating cavities 22 .

[0110] like Figure 3 As shown, in this embodiment, the upper surface of the bottom shell 20 is closed and provided with three groups of protrusions 23 at positions corresponding to the three accommodating cavities 22 along the Z-axis direction. The three groups of protrusions 23 are located at the front of the upper surface of the bottom shell 20 along the Y-axis direction. Each group of protrusions 23 includes two protrusions 23 arranged along the X-axis direction. The extension direction of each protrusion 23 intersects with the X-axis, and in this embodiment, extends along the Y-axis direction. The function of the protrusion 23 will be introduced together with the introduction of the contact portion 5.

[0111] like Figure 3 As shown, in this embodiment, the rear part of the bottom shell 20 along the Y-axis direction is provided with a coil accommodating cavity 24, the coil accommodating cavity 24 is located in the middle part of the bottom shell 20 along the X-axis direction, the coil accommodating cavity 24 is upwardly opened along the Z-axis direction and is used to accommodate the coil assembly 9, and the coil accommodating cavity 24 is provided with a plurality of compartments 25 on both sides along the X-axis direction, and some compartments 25 are provided with heat dissipation holes on the bottom surface of the bottom shell 20, and the heat dissipation holes are used to conduct the heat generated by electrical conduction in the accommodating part 2 to the external environment. In this embodiment, other components are not accommodated in most of the compartments 25, so the size of the coil accommodating cavity 24 can be increased along the X-axis direction as needed.

[0112] like Figure 3 As shown, in this embodiment, a first guide portion 26 is provided on the upper surface of the middle part of the bottom shell 20 along the X-axis direction and the Y-axis direction. In this embodiment, the first guide portion 26 is a guide groove extending along the Y-axis direction. In other embodiments, the first guide portion 26 may also be a protrusion.

[0113] like Figure 3As shown, in this embodiment, the bottom shell 20 is provided with a matching portion group 27 on the left and right sides along the X-axis direction, each matching portion group 27 includes at least two matching portions 28, and in this embodiment, each matching portion group 27 includes two matching portions 28. Each matching portion 28 in the same matching portion group 27 is arranged along the Y-axis direction. In this embodiment, each matching portion 28 is provided with a matching groove that runs through along the Y-axis direction, and the matching groove is used to match with the guide member 6. The groove wall of the matching groove can be attached with a metal arc ring to reduce the debris generated by the friction between the guide member 6 and the matching portion 28, and the contact surface between the matching groove and the guide member 6 can also be reduced by chamfering or rounding.

[0114] like Figure 3 As shown, in this embodiment, the bottom shell 20 is provided with contact cavities 29, and the number of contact cavities 29 is the same as and corresponds to the number of contact member groups 11. In this embodiment, the number of contact cavities 29 is three. The three contact cavities 29 are all located between the first guide portion 26 and each protrusion 23 along the Y-axis direction, and the three contact cavities 29 are arranged along the X-axis direction. The contact cavity 29 is used to accommodate the contact member group 11, and for the moving contact member group 13 to abut against or move away from the static contact member group 14 along the Y-axis direction. A barrier portion 30 is provided between two adjacent contact cavities 29. In this embodiment, the number of barrier portions 30 is two. The barrier portion 30 generally extends along the Y-axis direction and has a certain size in the Z-axis direction to separate adjacent contact cavities 29. When the moving contact member group 13 abuts against the static contact member group 14, the barrier portion 30 separates or even cuts off adjacent contact cavities 29. The barrier 30 is used to prevent the short circuit between adjacent static contact groups 14, which causes a short circuit between two phases of the three-phase AC power. It is also used to prevent the arc from being transmitted to other contact groups 11 when arcing occurs in some contact groups 11, causing a short circuit between two phases. In this embodiment, the barrier 30 is formed on the bottom shell 20 of the accommodating member 2, so the barrier 30 is of course also made of insulating material. In other embodiments, the barrier 30 can be formed on the push card 58, or fixed to the accommodating member 2 or the push card 58 as an independent component.

[0115] like Figure 1 As shown, in this embodiment, the bottom shell 20 has an opening upward along the Z-axis direction. The cover 19 is used to cover the opening of the bottom shell 20 and is fixedly connected to the bottom shell 20. In this embodiment, the cover 19 is snap-fitted with the bottom shell 20, and a plurality of plug-in columns are further provided on the cover 19, which are used to plug and cooperate with the bottom shell 20 to position the cover 19.

[0116] The magnetic circuit portion 3 is used to receive the pulse electrical signal, and according to the pulse electrical signal, it drives the pushing portion 4 to move linearly along the Y-axis direction to change the state of the contact portion 5. In this embodiment, the magnetic circuit portion 3 is also used to keep the pushing portion 4 and the contact portion 5 in the current state after the pulse electrical signal disappears until a new pulse electrical signal is received.

[0117] See also Figure 4 , Figure 4 FIG. 3 shows the magnetic circuit portion 3 in this embodiment. Figure 4 As shown, the magnetic circuit portion 3 in this embodiment includes a coil assembly 9 and an armature assembly 10.

[0118] See also Figure 5 , Figure 5 The coil assembly 9 in this embodiment is shown. Figure 5 As shown, the coil assembly 9 includes a coil bobbin 31 , a coil winding 32 , an iron core 33 , a yoke 34 and a shield 35 .

[0119] like Figure 5 As shown, the coil frame 31 is fixedly connected to the bottom shell 20 and is located in the coil accommodating cavity 24. The coil frame 31 extends along the X-axis direction and is provided with a central hole extending along the X-axis direction. The coil frame 31 is provided with retaining walls at both ends along the X-axis direction.

[0120] like Figure 5 As shown, the coil winding 32 is wound on the coil frame 31 and is located between the two retaining walls. Therefore, the axis of the coil winding 32 also extends along the X-axis direction. The two terminals of the coil winding 32 are connected to the two signal input terminals 36, which are fixed to the retaining walls of the coil frame 31 and penetrate the bottom shell 20 along the Z-axis direction and extend from the bottom surface of the bottom shell 20 (see Figure 2 ).

[0121] like Figure 5 As shown, the iron core 33 is placed in the central hole of the coil frame 31 and extends along the X-axis direction.

[0122] like Figure 5 As shown, in the present embodiment, the number of yokes 34 is two and both are made of magnetic conductive material. The two yokes 34 are respectively a first yoke 37 and a second yoke 38. The two yokes 34 are respectively fixedly connected to the two ends of the core 33, and the ends of the two yokes 34 away from the core 33 form magnetic drive ends 39 respectively. The two magnetic drive ends 39 are respectively a first magnetic drive end 40 and a second magnetic drive end 41. Among them, the first magnetic drive end 40 is formed on the first yoke 37, and the second magnetic drive end 41 is formed on the second yoke 38. In the present embodiment, the two yokes 34 are both L-shaped, and the ends of their longer arms are fixedly connected to the ends of the core 33, and their shorter arms extend toward each other to form magnetic drive ends 39. The two magnetic drive ends 39 are arranged along the X-axis direction and extend along the X-axis direction to limit the movement of the armature assembly 10 along the Y-axis direction. Specifically, in this embodiment, the two magnetic drive ends 39 are not only used to limit the forward movement of the armature assembly 10 from the first position to the second position along the Y-axis direction, but also to limit the backward movement of the armature assembly 10 from the second position to the first position along the Y-axis direction.

[0123] like Figure 5As shown, the shielding member 35 is fixed relative to the coil frame 31 and is made of metal material. In this embodiment, the shielding member 35 covers the other parts of the coil assembly 9 above along the Z axis and on the left and right sides along the X axis. The shielding member 35 is used to prevent other parts of the coil assembly 9 from being easily disturbed by the external magnetic field, and also prevent the magnetic field of other parts of the coil assembly 9 from being easily disturbed by the outside.

[0124] In this embodiment, the coil component 9 is stimulated by the pulse electric signal to reverse the polarity temporarily formed by the two magnetic drive ends 39. "Temporarily formed" in this embodiment means that the polarity of the magnetic drive end 39 formed by the pulse electric signal disappears as the pulse electric signal disappears. "Reversal" in this embodiment means that when the current direction of the pulse electric signal received by the coil component 9 this time is different from that of the pulse electric signal received last time, the polarity of the magnetic drive end 39 temporarily formed this time is opposite to the polarity of the magnetic drive end 39 temporarily formed last time. In this embodiment, as mentioned above, the pulse electric signal can be divided into a first pulse electric signal and a second pulse electric signal. The first pulse electric signal is correspondingly used to control the conduction of the external circuit, and the second pulse electric signal is correspondingly used to control the shutdown of the external circuit. In this embodiment, the first pulse electric signal and the second pulse electric signal are electric pulses with opposite current directions. In this embodiment, for the convenience of introduction, it is set that the coil winding 32 is excited by the first pulse electric signal to form a first magnetic field, and the first magnetic drive end 40 is temporarily N-pole polarity, and the second magnetic drive end 41 is temporarily S-pole polarity. After the first pulse electrical signal disappears, the first magnetic drive end 40 and the second magnetic drive end 41 do not have the polarity generated by the first magnetic field. On the contrary, the coil winding 32 is excited by the second pulse electrical signal to form a second magnetic field, and the first magnetic drive end 40 temporarily has an S-pole polarity, while the second magnetic drive end temporarily has an N-pole polarity. After the second pulse electrical signal disappears, the first magnetic drive end 40 and the second magnetic drive end 41 do not have the polarity generated by the second magnetic field.

[0125] In this embodiment, the coil assembly 9 includes only one coil winding 32, and the coil winding 32 has only two signal input terminals 36. In other embodiments, the coil assembly 9 may include two coil windings 32, and the two coil windings 32 may be provided with three or four signal input terminals 36. Each signal input terminal 36 outputs a corresponding first pulse electrical signal and a second pulse electrical signal to the two coil windings 32. At this time, as a whole, the coil assembly 9 is still stimulated by the pulse electrical signal to reverse the polarity temporarily formed by the two magnetic drive ends 39.

[0126] The armature assembly 10 is driven by the coil assembly 9 to move along the Y-axis direction, and its movement can be divided into movement from the rear first position to the front second position and movement from the front second position to the rear first position. When the armature assembly 10 moves to the first position, the relay 1 is in the off state, and the electrical connection between the external three-phase alternating current power source and the load is cut off. When the armature assembly 10 moves to the second position, the relay 1 is in the on state, and the electrical connection between the external three-phase alternating current power source and the load is turned on.

[0127] See also Figures 6 to 8 , Figures 6 to 8 FIG. 1 shows the armature assembly 10 in this embodiment. Figure 6 As shown, in this embodiment, the armature assembly 10 includes two permanent magnets 42 and two armatures 43 .

[0128] like Figure 6 As shown, in this embodiment, the two permanent magnets 42 are formed by magnetized magnetic steel. In other embodiments, the two permanent magnets 42 may also be made of other permanent magnetic materials, such as neodymium iron boron permanent magnets. In this embodiment, the two permanent magnets 42 are respectively a first permanent magnet 44 and a second permanent magnet 45. In this embodiment, the two permanent magnets 42 have two magnetic poles with fixed polarity, and the two magnetic poles are respectively a first magnetic pole 46 and a second magnetic pole 47, and the first magnetic pole 46 and the second magnetic pole 47 have opposite polarities. The first magnetic poles 46 of the two permanent magnets 42 have the same polarity, and the second magnetic poles 47 of the two permanent magnets 42 have the same polarity. In this embodiment, for the convenience of introduction, the first magnetic pole is set to be an N pole and the second magnetic pole is set to be an S pole. In this embodiment, the two permanent magnets 42 are arranged along the X-axis direction. The two magnetic poles of each permanent magnet 42 are arranged along the Y-axis direction. The first magnetic pole 46 of the first permanent magnet 44 is at the front along the Y-axis direction, and the second magnetic pole 47 is at the back along the Y-axis direction; the first magnetic pole 46 of the second permanent magnet 45 is at the back along the Y-axis direction, and the second magnetic pole 47 is at the front along the Y-axis direction.

[0129] like Figure 6As shown, the two armatures 43 are respectively a first armature 48 and a second armature 49. The first armature 48 is fixedly connected to the first magnetic poles 46 of the two permanent magnets 42, and the second armature 49 is fixedly connected to the second magnetic poles 47 of the two permanent magnets 42. The projections of the two armatures 43 on the first projection plane U perpendicular to the Z-axis direction intersect with each other. Each armature 43 is provided with two suction parts 50 at both ends along the X-axis direction, wherein the first armature 48 is provided with a first suction part 51 and a second suction part 52 at both ends along the X-axis direction, the first suction part 51 is on the left side along the X-axis direction and in the front along the Y-axis direction, and the second suction part 52 is on the right side along the X-axis direction and in the rear along the Y-axis direction; the second armature 49 is provided with a third suction part 53 and a fourth suction part 54 at both ends along the X-axis direction, the third suction part 53 is on the right side along the X-axis direction and in the front along the Y-axis direction, and the fourth suction part 54 is on the left side along the X-axis direction and in the rear along the Y-axis direction. Therefore, the first suction part 51 and the third suction part 53 are arranged along the X-axis direction, and the fourth suction part 54 and the second suction part 52 are arranged along the X-axis direction; the first suction part 51 and the fourth suction part 54 are arranged along the Y-axis direction, and the third suction part 53 and the second suction part 52 are arranged along the Y-axis direction.

[0130] like Figure 6 and Figure 7 As shown, each armature is provided with a narrower section 56 and a wider section 57. The width of the narrower section 56 along the Z-axis direction is smaller than the width of the wider section 57 along the Z-axis direction. In this embodiment, the number of the wider sections 57 is two, and the two wider sections 57 are respectively located on both sides of the narrower section 56 along the X-axis direction. The portions 55 of each armature 43 that intersect with each other are located in the narrower section, so that a gap V is formed between the portions 55 of the two armatures 43 that intersect with each other. In each armature 43, the positions fixed to the two permanent magnets 42 are respectively located on both sides of the portions 55 that intersect with each other along the X-axis direction and are both located in the wider section 57.

[0131] like Figure 8 As shown, in this embodiment, the armature assembly 10 extends along the X-axis direction, and its dimension in the X-axis direction is greater than its dimension in the Y-axis direction. The projection of the armature assembly 10 on the first projection plane U is mirror-symmetric relative to the symmetry plane W perpendicular to the X-axis direction.

[0132] See also Figures 9 to 15 , Figures 9 to 15 The operating principle of the magnetic circuit portion 3 in this embodiment is shown.

[0133] like Fig. 9 As shown, in this embodiment, the armature assembly 10 is located between the two long arms connecting the yoke 34 and the core 33 along the X-axis direction. The first magnetic drive end 40 is located between the first suction part 51 and the fourth suction part 54 along the Y-axis direction; the second magnetic drive end 41 is located between the third suction part 53 and the second suction part 52 along the Y-axis direction.

[0134] Fig. 9 FIG. 2 shows the state of the magnetic circuit portion 3 when the armature assembly 10 in this embodiment is in the magnetic holding state at the first position. Fig. 9 As shown, when the armature assembly 10 is in the magnetic holding state at the first position, the first suction portion 51 suctions the first magnetic drive end 40, and the third suction portion 53 suctions the second magnetic drive end 41. At this time, the magnetic circuit portion 3 forms two closed magnetic circuits, namely the first closed magnetic circuit A1 and the second closed magnetic circuit A2. The first closed magnetic circuit A1 runs from the first magnetic pole 46 of the first permanent magnet 44, through the first suction portion 51, the first magnetic drive end 40, the first yoke 37, the iron core 33, the second yoke 38, the second magnetic drive end 41, the third suction portion 53, the part 55 that intersects with each other of the second armature 49, the second magnetic pole 47 of the first permanent magnet 44, and returns to the first magnetic pole 46 of the first permanent magnet 44, without any air gap in between, and passes through the entire coil assembly 9. The second closed magnetic circuit A2 runs from the first magnetic pole 46 of the second permanent magnet 45, through the intersecting portion 55 of the first armature 48, the first suction portion 51, the first magnetic drive end 40, the first yoke 37, the iron core 33, the second yoke 38, the second magnetic drive end 41, the third suction portion 53, the second magnetic pole 47 of the second permanent magnet 45, and returns to the first magnetic pole 46 of the second permanent magnet 45, without any air gap in between, and passes through the entire coil assembly 9. Therefore, when the armature assembly 10 is in the magnetic holding state at the first position, due to the existence of the first closed magnetic circuit A1 and the second closed magnetic circuit A2, and the superposition effect between the two, a greater magnetic attraction force is generated between the first suction portion 51 and the first magnetic drive end 40 and between the third suction portion 53 and the second magnetic drive end 41, and the armature assembly 10 is maintained at the first position relative to the coil assembly 9.

[0135] Fig.10The state of the magnetic circuit part 3 when the coil assembly 9 in this embodiment just receives the first pulse electrical signal is shown. At this time, the coil winding 32 is excited by the first pulse electrical signal to generate the first magnetic field, so that the first magnetic drive end 40 temporarily has the N pole polarity, and the second magnetic drive end 41 temporarily has the S pole polarity. Since the first magnetic drive end 40 and the first suction part 51 have the same polarity, both are N poles, the first magnetic drive end 40 generates a magnetic repulsion force on the first suction part 51; since the second magnetic drive end 41 and the third suction part 53 have the same polarity, both are S poles, the second magnetic drive end 41 generates a magnetic repulsion force on the third suction part 53. In addition, the magnetic circuit part 3 also forms two push magnetic circuits at this time, namely the first push magnetic circuit B1 and the second push magnetic circuit B2. The first pushing magnetic circuit B1 goes from the first magnetic drive end 40, through the first air gap P, the fourth attraction part 54, the second magnetic pole 47 of the first permanent magnet 44, the first magnetic pole 46 of the first permanent magnet 44, the intersecting part 55 of the first armature 48, the second attraction part 52, the first air gap P, the second magnetic drive end 41, the second yoke 38, the iron core 33, the first yoke 37 and returns to the first magnetic drive end 40, with only two first air gaps P that must exist as travel gaps in the middle, and passes through the entire coil assembly 9. The second pushing magnetic circuit B2 goes from the first magnetic drive end 40, through the first air gap P, the fourth suction part 54, the intersecting part 55 of the second armature 49, the second magnetic pole 47 of the second permanent magnet 45, the first magnetic pole 46 of the second permanent magnet 45, the second suction part 52, the first air gap P, the second magnetic drive end 41, the second yoke 38, the iron core 33, the first yoke 37 and returns to the first magnetic drive end 40. There are only two first air gaps P in the middle that must exist as travel gaps, and it passes through the entire coil assembly 9. Therefore, when the coil assembly 9 just receives the first pulse electrical signal, not only does the first magnetic drive end 40 exert a magnetic repulsion force on the first suction part 51, and the second magnetic drive end 41 exerts a magnetic repulsion force on the third suction part 53, but also due to the existence of the first pushing magnetic circuit B1 and the second pushing magnetic circuit B2, and the superposition effect between the two, the first magnetic drive end 40 generates a magnetic attraction force on the fourth suction part 54, and the second magnetic drive end 41 generates a magnetic attraction force on the second suction part 52, so that the coil assembly 9 can form a stronger first driving force F1 on the armature assembly 10, pushing the armature assembly 10 to move from the first position along the Y-axis direction to the second position.

[0136] Fig.11 The state of the magnetic circuit portion 3 when the armature assembly 10 is driven by the coil assembly 9 to move to the second position in this embodiment is shown. During the movement of the armature assembly 10 from the first position to the second position, the first magnetic drive end 40 limits the movement of the fourth suction part 54 along the Y-axis direction from the first position to the second position, so that the fourth suction part 54 suctions the first magnetic drive end 40; the second magnetic drive end 41 limits the movement of the second suction part 52 along the Y-axis direction from the first position to the second position, so that the second suction part 52 suctions the second magnetic drive end 41. Fig.11 As shown, when the armature assembly 10 just moves to the second position, the first pulse electric signal and the first magnetic field have not disappeared, the first magnetic drive end 40 still temporarily has the N-pole polarity, and the second magnetic drive end 41 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 forms two closed magnetic loops, namely the third closed magnetic loop A3 and the fourth closed magnetic loop A4. The third closed magnetic loop A3 starts from the first magnetic drive end 40, passes through the fourth suction part 54, the second magnetic pole 47 of the first permanent magnet 44, the first magnetic pole 46 of the first permanent magnet 44, the part 55 where the first armature 48 intersects with each other, the second suction part 52, the second magnetic drive end 41, the second yoke 38, the core 34, the first yoke 37 and returns to the first magnetic drive end 40, without any air gap in between, and passes through the entire coil assembly 9. The fourth closed magnetic circuit A4 goes from the first magnetic drive end 40, through the fourth suction part 54, the cross-section 55 of the second armature 45, the second magnetic pole 47 of the second permanent magnet 45, the first magnetic pole 46 of the second permanent magnet 45, the second suction part 52, the second magnetic drive end 41, the second yoke 38, the iron core 34, the first yoke 37, and returns to the first magnetic drive end 40 without any air gap in between, and passes through the entire coil assembly 9. Therefore, when the armature assembly 10 just moves to the second position, due to the existence of the third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 and the superposition effect between the two, a greater magnetic attraction is generated between the first magnetic drive end 40 and the fourth suction part 54 and between the second magnetic drive end 41 and the second suction part 52.

[0137] Fig.12 FIG. 2 shows the state of the magnetic circuit portion 3 when the armature assembly 10 in this embodiment is in the magnetic holding state at the second position. Fig.12 As shown in FIG. 1 , when the first pulse electric signal disappears, the first magnetic field disappears, and the first magnetic drive end 40 and the second magnetic drive end 41 no longer have the polarity generated by the first magnetic field. At this time, the third closed magnetic loop A3 and the fourth closed magnetic loop A4 still exist, wherein the third closed magnetic loop A3 can be regarded as starting from the first magnetic pole 46 of the first permanent magnet 44, and its path is the same as Fig.11 The path of the third closed magnetic circuit A3 shown in FIG. 1 is the same as that of the third closed magnetic circuit A3; the fourth closed magnetic circuit A4 can be regarded as starting from the first magnetic pole 46 of the second permanent magnet 45, and its path is the same as that of the third closed magnetic circuit A3. Fig.11 The path of the fourth closed magnetic circuit A4 shown is the same. The third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 are superimposed on each other, so that a greater magnetic attraction force is generated between the fourth suction portion 54 and the first magnetic drive end 40 and between the second suction portion 52 and the second magnetic drive end 41, and the armature assembly 10 is maintained at the second position relative to the coil assembly 9.

[0138] Fig.13 FIG. 2 shows the state of the magnetic circuit portion 3 when the coil assembly 9 in this embodiment just receives the second pulse electrical signal. Fig.13As shown, at this time, the coil winding 32 is excited by the second pulse electrical signal to generate a second magnetic field, so that the first magnetic drive end 40 temporarily has an S-pole polarity, and the second magnetic drive end 41 temporarily has an N-pole polarity. Since the first magnetic drive end 40 and the fourth suction part 54 have the same polarity, both are S-pole, the first magnetic drive end 40 generates a magnetic repulsion force on the fourth suction part 54; since the second magnetic drive end 41 and the second suction part 52 have the same polarity, both are N-pole, the second magnetic drive end 41 generates a magnetic repulsion force on the second suction part 52. In addition, the magnetic circuit part 3 also forms two push magnetic circuits at this time, namely the third push magnetic circuit B3 and the fourth push magnetic circuit B4. The third pushing magnetic circuit B3 goes from the second magnetic drive end 41, through the second air gap Q, the third suction part 53, the intersecting part 55 of the second armature 45, the second magnetic pole 47 of the first permanent magnet 44, the first magnetic pole 46 of the first permanent magnet 44, the first suction part 51, the second air gap Q, the first magnetic drive end 40, the first yoke 37, the iron core 33, the second yoke 38 and returns to the second magnetic drive end 41, with only two second air gaps Q that must exist as travel gaps in the middle, and passes through the entire coil assembly 9. The fourth pushing magnetic circuit B4 goes from the second magnetic drive end 41 through the second air gap Q, the third attraction part 53, the second magnetic pole 47 of the second permanent magnet 45, the first magnetic pole 46 of the second permanent magnet 45, the intersecting part 55 of the first armature 48, the first attraction part 51, the second air gap Q, the first magnetic drive end 40, the first yoke 37, the iron core 33, and the second yoke 38 back to the second magnetic drive end 41, with only two second air gaps Q that must exist as travel gaps in the middle, and passes through the entire coil assembly 9. Therefore, when the coil assembly 9 just receives the second pulse electrical signal, not only does the first magnetic drive end 40 exert a magnetic repulsion force on the fourth suction part 54, and the second magnetic drive end 41 exerts a magnetic repulsion force on the second suction part 52, but also due to the existence of the third push magnetic circuit B3 and the fourth push circuit B4, and the existence of a superposition effect between the two, the first magnetic drive end 40 generates a magnetic attraction force on the first suction part 51, and the second magnetic drive end 41 generates a magnetic attraction force on the third suction part 53, so that the coil assembly 9 can form a stronger second driving force F2 on the armature assembly 10, pushing the armature assembly 10 to move from the second position along the Y-axis direction to the first position.

[0139] Fig.14 The state of the magnetic circuit portion 3 when the armature assembly 10 is driven by the coil assembly 9 to move to the first position in this embodiment is shown. During the movement of the armature assembly 10 from the second position to the first position, the first magnetic drive end 40 limits the movement of the first suction portion 51 from the second position to the first position along the Y-axis direction, so that the first suction portion 51 suctions the first magnetic drive end 40; the second magnetic drive end 41 limits the movement of the third suction portion 53 from the second position to the first position along the Y-axis direction, so that the third suction portion 53 suctions the second magnetic drive end 41. Fig.14As shown, when the armature assembly 10 just moves to the first position, the second pulse electric signal and the second magnetic field have not disappeared, the first magnetic drive end 40 still temporarily has the S polarity, and the second magnetic drive end 41 still temporarily has the S polarity. At this time, the magnetic circuit part 3 still has the first closed magnetic loop A1 and the second closed magnetic loop A2, wherein the first closed magnetic loop A1 can be regarded as starting from the second magnetic drive end 41, and its path is the same as Fig. 9 The path of the first closed magnetic circuit A1 shown in FIG. 4 is the same as that of the first closed magnetic circuit A1; the second closed magnetic circuit A2 can be regarded as starting from the second magnetic drive end 41, and its path is the same as that of the first closed magnetic circuit A1. Fig. 9 Therefore, when the armature assembly 10 just moves to the first position, due to the existence of the first closed magnetic circuit A1 and the second closed magnetic circuit A2, and the superposition effect between the two, a greater magnetic attraction force is generated between the first magnetic drive end 40 and the first suction part 51 and between the second magnetic drive end 41 and the third suction part 53.

[0140] When the second pulse electrical signal disappears, the second magnetic field disappears, and the first magnetic drive end 40 and the second magnetic drive end 41 no longer have the polarity generated by the second magnetic field. Fig. 9 It is shown in the magnetic holding state in the first position.

[0141] The above process fully records the working principle of the magnetic circuit part 3 in this embodiment. From the above introduction, it can be seen that no matter whether the magnetic circuit part 3 is in the magnetic holding state or the magnetic driving state, the first part of the magnetic circuit without air gap can be formed between the two suction parts 50 of the armature assembly 10, and the second part of the magnetic circuit passing through the entire coil assembly 9 can be formed between the two magnetic driving ends 39 of the coil assembly 9. The first part and the second part can form a complete magnetic circuit regardless of whether they are in the magnetic holding state or the magnetic driving state, so that the coil assembly 9 in this embodiment drives the armature assembly 10 to move linearly along the Y-axis direction according to the pulse electrical signal, and after the pulse electrical signal disappears, the armature assembly 10 remains in the current state until a new pulse electrical signal is received.

[0142] The moving part 17 in this embodiment is the main part of the relay 1 that moves relative to the receiving part 2. Fig.15 , Fig.15 The moving part 17 in this embodiment is shown. Fig.15As shown, in this embodiment, the moving component 17 includes an armature assembly 10, a pushing portion 4, a moving contact group 13 and a first conductive magnet group 15. Among them, the pushing portion 4 includes a pushing card 58, a connecting member 59, an elastic bracket group 60 and a limit member 61. Among them, the armature assembly 10, the pushing card 58 and the connecting member 59 form a pushing unit 62, and the moving contact group 13, the first conductive magnet group 15 and the elastic bracket group 60 form a moving contact unit 63. The pushing unit 62 is used to drive the moving contact unit 63 to move linearly along the Y-axis direction, and the moving contact unit 63 is used to achieve resistance or distance from the static contact group 14. For the convenience of introduction, the moving component 17 in this embodiment is described in detail in the order of the pushing unit 62, the moving contact unit 63 and the limit member 61.

[0143] See also Figures 16 to 18 , Figures 16 to 18 The push unit 62 in this embodiment is shown. As mentioned above, the push unit 62 includes the armature assembly 10, the push card 58 and the connecting member 59. Among them, the armature assembly 10 has been described in detail before. The push card 58 and the connecting member 59 are described in detail below.

[0144] The push card 58 is driven by the armature assembly 10 and is used to install and carry the moving contact unit 62. In this embodiment, "carrying" means that the gravity of an object will act on another object. Fig.16 As shown, the push card 58 is fixedly connected to the armature assembly 10. In this embodiment, the push card 58 is integrally formed with the armature assembly 10 and the connecting member 59 by insert injection molding. The push card 58 can be divided into a receiving portion 64 for receiving the armature assembly 10 and a connecting portion 65 for receiving the connecting member 59 and installing and carrying the moving contact unit 62. It should be noted that the push card 58 is divided into the receiving portion 64 and the connecting portion 65 only for the convenience of introduction, and the two are actually connected as one.

[0145] like Fig.16 As shown, when the armature assembly 10 is accommodated in the accommodating portion 64, except for the four suction portions 50, the rest of the armature assembly 10 is wrapped in the accommodating portion 64. Since the size of the armature assembly 10 along the X-axis direction is greater than the size along the Y-axis direction, the size of the accommodating portion 64 along the X-axis direction is also greater than the size along the Y-axis direction. In this embodiment, the four suction portions 50 all extend from the accommodating portion 64 along the X-axis direction and are used to interact with the two magnetic drive ends 39. Among them, the first suction portion 51 and the fourth suction portion 54 extend from the left side of the accommodating portion 64 along the X-axis direction, and the first suction portion 51 is located at the front along the Y-axis direction, and the fourth suction portion 54 is located at the rear along the Y-axis direction; the third suction portion 53 and the second suction portion 52 extend from the right side of the accommodating portion 64 along the X-axis direction, and the third suction portion 53 is located at the front along the Y-axis direction, and the second suction portion 52 is located at the rear along the Y-axis direction.

[0146] like Fig.16As shown, the connecting portion 65 extends along the X-axis direction. Along the X-axis direction, the accommodating portion 64 is located in the middle position relative to the connecting portion 65. A push portion 66 is provided on the right side of the back side of the connecting portion 65 away from the static contact assembly 14 along the X-axis direction, and the "back side" here refers to the direction of the surface away from the static contact assembly 14. The push portion 66 extends from front to back along the Y-axis direction, and is suitable for acting on the micro switch 8, so that the micro switch 8 can sense the state of the relay 1. Specifically, when the armature assembly 10 is in the first position, the push portion 66 abuts against the micro switch 8, and when the armature assembly 10 is in the second position, the push portion 66 is away from the micro switch 8.

[0147] like Fig.17 As shown, the bottom surface of the push card 58 is provided with a second guide portion 67 in the middle along the X-axis direction and along the Y-axis direction. The second guide portion 67 is slidably matched with the first guide portion 26 along the Y-axis direction. Since in this embodiment, the first guide portion 26 is a guide groove extending along the Y-axis direction, the second guide portion 67 is a guide protrusion extending along the Z-axis direction. The guide protrusion is inserted into the guide groove and slides relative to the guide groove along the Y-axis direction, so that the first guide portion 26 can guide the linear motion of the push card 58 along the Y-axis direction. In other embodiments, the first guide portion 26 can also be set as a guide protrusion and the second guide portion 67 can be set as a guide groove. It is also possible to adopt any sliding matching structure known to technicians in the relevant field so that the first guide portion 26 guides the push card 58.

[0148] like Fig.18 As shown, the connecting portion 65 is provided with mounting holes 68 on both sides along the X-axis direction, and the mounting holes 68 are used to cooperate with the guide member 6. In this embodiment, the mounting holes 68 are arranged at the position closest to the edge of the connecting portion 65 along the X-axis direction, so that the guiding function of the guide member 6 is more obvious.

[0149] like Fig.18 As shown, in this embodiment, between the two mounting holes 68, three limiter groups 69 are provided on the connection surface of the connection portion 65 facing the static contact group 14, and the number of the limiter groups 69 is the same as and corresponds to the number of the moving contact group 13. The three limiter groups 69 are generally symmetrically arranged along the X-axis direction, and face the corresponding contact cavities 29 respectively. Each limiter group 69 is provided with two limiter portions 70. The two limiter portions 70 are arranged along the Z-axis direction. In this embodiment, the limiter portion 70 is a connecting column protruding from the connection surface.

[0150] like Fig.18 As shown, in this embodiment, among the longitudinal sections of the push card 58 perpendicular to the Y-axis direction, the dimension of the longitudinal section located in the accommodating portion 64 along the X-axis direction is the smallest among the dimensions of the longitudinal sections of the push card 58 along the X-axis direction. This essentially means that, in the Y-axis direction, no connecting rod having a dimension smaller than that of the accommodating portion 64 along the X-axis direction is provided between the accommodating portion 64 and the connecting portion 65.

[0151] like Fig.18 As shown, as mentioned above, the connecting member 59 and the pushing card 58 are insert-injected and integrally formed. In this embodiment, the number of the connecting members 59 is the same as and corresponds to the moving contact member group 13. The connecting member 59 is used to connect with the corresponding limit member 61 so that the limit member 61 is fixed relative to the pushing card 58. In this embodiment, the number of the connecting members 59 is three and they are arranged along the X-axis direction. The position of each connecting member 59 along the Y-axis direction is the same as the position of the corresponding limit member group 69 along the Y-axis direction. In this embodiment, the connecting member 59 extends along the Z-axis direction, and its two ends extend out of the pushing card 58 to form two clamping portions 71. The clamping portion 71 is used to connect the limit member 61.

[0152] See also Fig.19 , Fig.19 The moving contact unit 63 in this embodiment is shown. The moving contact unit 63 is the same in number and corresponds to the moving contact member group 13. In this embodiment, the number of the moving contact units 63 is three and they are arranged along the X-axis direction. As described above, each moving contact unit 63 includes a moving contact member group 13, a first magnetic conductive component 15 and an elastic bracket group 60.

[0153] The moving contact group 13 is driven by the pushing unit 62 to abut or move away from the stationary contact group 14 along the Y-axis direction. When the armature assembly 10 is in the first position, the moving contact group 13 moves away from the stationary contact group 14, the relay 1 is in the off state, and the electrical connection between the power supply and the load in the external circuit is cut off. When the armature assembly 10 is in the second position, the moving contact group 13 abuts against the stationary contact group 14, the relay 1 is in the on state, and the electrical connection between the power supply and the load in the external circuit is turned on.

[0154] like Fig.19As shown, the moving contact group 13 includes at least one moving contact 72. In this embodiment, the moving contact group 13 includes more than two moving contacts 72, specifically two, and each moving contact 72 is arranged at intervals along the Z-axis direction. The moving contact 72 is used to contact or stay away from the static contact group 14. Each moving contact 72 includes a current bridge 73 and two moving contacts 74 fixed to each other. The current bridge 73 is made of a metal with good conductivity and extends along the X-axis direction. The two moving contacts 74 are both made of a metal with good conductivity and arranged along the X-axis direction. The two moving contacts 74 are respectively located on both sides of the front side of the current bridge 73 facing the static contact group 14 along the X-axis direction. The two moving contacts 74 are respectively a first moving contact 75 and a second moving contact 76, wherein the first moving contact 75 is located on the left side along the X-axis direction, and the second moving contact 76 is located on the right side along the X-axis direction. When the moving contact group 13 contacts the stationary contact group 14, the current flows from one of the moving contacts 74 to the other moving contact 74 through the current bridge 73. For the convenience of introduction, it is assumed that the current flows from the first moving contact 75 to the second moving contact 76 through the current bridge 73. Those skilled in the art will certainly know that since the relay 1 in this embodiment is used to control the on and off of AC power, such a setting is only for the convenience of introduction.

[0155] like Fig.19 As shown, the first magnet group 15 includes at least one first magnet 77. The number of the first magnets 77 may be the same as and correspond to the number of the moving contacts 72 in the corresponding moving contact group 13, or may be different and not correspond. In the present embodiment, the number of the first magnets 77 is the same as and corresponds to the number of the moving contacts 72 in the corresponding moving contact group 13. In the first magnet group 15, the number of the first magnets 77 is two, and each first magnet 77 is arranged at intervals along the Z-axis direction. In the present embodiment, the first magnet 77 is fixedly connected to the corresponding moving contact 72. The first magnet 77 is provided with a main body 78 and two extensions 79. The main body 78 extends along the Z-axis direction and is located on the back of the guide bridge 73. In the present embodiment, the main body 78 is attached to the back of the guide bridge 73. The two extensions 79 extend from both ends of the body 77 along the Z axis toward the stationary contact group 14 along the Y axis, and cross the current bridge 73 and even the moving contact 74 along the Y axis, so that when the moving contact group 13 contacts the stationary contact group 14, the extensions 79 are close to the second magnetic conductive member group 16. In other embodiments, the first magnetic conductive member 77 does not necessarily have the shape of the present embodiment, and it may have only the body 78 or only one extension 79. As long as the first magnetic conductive member 77 can form a magnetic circuit with the second magnetic conductive member group 79.

[0156] like Fig.19As shown, the elastic bracket group 60 is installed on the push card 58. The elastic bracket group 60 stores energy when the moving contact group 13 contacts the static contact group 14 along the Y-axis direction, and releases energy when the moving contact group 13 moves away from the static contact group 14 along the Y-axis direction. The elastic bracket group 60 includes at least one elastic bracket 80. The elastic bracket 80 can be the same and corresponding to the number of the moving contacts 72 in the corresponding moving contact group 13, or different and non-corresponding. In this embodiment, the number of elastic brackets 80 is one. The elastic bracket 80 is provided with a bracket body 81 and at least one elastic support portion 82 connected to each other as a whole. The bracket body 81 is fixed relative to the push card 58 and is provided with an adapter portion 83. The adapter portion 83 is the same and corresponding to the number of the limiting portions 70 in the corresponding limiting portion group 69. In this embodiment, the number of the adapter portions 83 is two and is arranged along the Z-axis direction. The limiting portion 70 and the adapter portion 83 slide together along the Y-axis direction to limit the movement of the bracket body 81 perpendicular to the Y-axis direction. In this embodiment, the limiting portion 70 is a connecting column protruding from the connecting surface, and the adapter portion 83 is a connecting hole. The two connecting columns are inserted into the two connecting holes, so that the elastic bracket 80 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 82 of each elastic bracket 80 is the same as and corresponds to the number of the movable contacts 72 in the corresponding movable contact group 13, and of course the number may be different and non-corresponding. In this embodiment, the number of the elastic support portions 82 is two and arranged along the Z-axis direction. Each movable contact 72 is installed on the corresponding elastic support portion 82. In this embodiment, each elastic support portion 82 includes two elastic arms 84, which extend from both sides of the bracket body 81 along the X-axis direction, and at least partially tilt away from the push card 85 along the Y-axis direction. The free ends of the two elastic arms 84 are respectively fixed to the back of the overcurrent bridge 73, and the positions fixed to the overcurrent bridge 73 are respectively located on the back of the first movable contact 75 and the second movable contact 76 along the Y-axis direction. The elastic support portion 82 may also adopt other structures as long as it can store energy when the movable contact assembly 13 contacts the stationary contact assembly 14 and release energy when the movable contact assembly 13 moves away from the stationary contact assembly 14 .

[0157] See also Fig. 20 , Fig. 20The limit member 61 in this embodiment is shown. The number of the limit members 61 is the same as and corresponds to the number of the moving contact group 13. In this embodiment, the number of the limit members 61 is three, and each limit member 61 is arranged along the X-axis direction. The limit member 61 is fixed relative to the push card 58 and is used to abut each moving contact 72 along the Y-axis direction when the corresponding moving contact group 13 is away from the static contact group 14 to limit the distance between each moving contact 72 and the static contact group 14. The limit member 61 includes an abutment portion 85 and two attachment portions 86. The abutment portion 85 extends along the Z-axis. When the moving contact group 13 is away from the static contact group 14, the overcurrent bridge 73 abuts against the abutment portion 85 along the Y-axis direction under the action of the elastic bracket 80. The abutment portion 85 is provided with an avoidance hole 87 suitable for each extension portion 79 of the two first magnetic conductors 77 to extend along the Y-axis direction. In this embodiment, the number of the avoidance holes 87 is three and arranged along the Z-axis direction. Two attachment portions 86 extend from both ends of the abutment portion 85 along the Z-axis direction and away from the stationary contact member group 14 along the Y-axis direction. Each attachment portion 86 is provided with a clamping hole 88, which is used to clamp with a corresponding clamping portion 71 on a corresponding connecting member 59, so that the limiting member 61 is fixed relative to the push card 58.

[0158] See also Fig.21 , Fig.21 The moving part 17 in this embodiment is shown. Fig.21 As shown, after the moving part 17 is assembled, the number of the armature assembly 10 and the push card 58 are both one, and the number of the limit part group 70, the connecting member 59, the elastic bracket group 60, the limit part 61, the moving contact member group 13 and the first conductive magnet group 15 are all three. Each first conductive magnet 77 in the first conductive magnet group 15 is fixed to the corresponding moving contact member 72, and each moving contact member 72 is fixed to the corresponding elastic support part 82. The elastic bracket 80 is slidably matched with each limit part 70 of the corresponding limit part group 69, the limit part 61 is clamped with the connecting member 59, and the abutment part 85 abuts against the overcurrent bridge 73 of each moving contact member 72 along the Y-axis direction to limit the distance between each moving contact member 72 and the static contact member group 14, and also limits the bracket body 81 along the Y-axis direction, so that the bracket body 81 is fixed relative to the push card 58.

[0159] See also Fig. 22 , Fig. 22 FIG. 2 shows a static contact assembly 14 in this embodiment. The static contact assembly 14 is fixedly connected to the bottom shell 20. Fig. 22 As shown, in this embodiment, the number of the static contact group 14 is the same as and corresponds to the number of the dynamic contact group 13. In this embodiment, the number of the static contact group 14 is three and they are arranged along the X-axis direction. The static contact group 14 is used to connect one phase of the three-phase alternating current. The static contact group 14 includes two static contacts 89, and the two static contacts 89 are both provided with a static contact point 90 and a load terminal 91. The two static contacts 89 are respectively a first static contact 92 and a second static contact 93. The first static contact 92 and the second static contact 93 are arranged along the X-axis direction.

[0160] like Fig. 22 As shown, in this embodiment, the first static contact 92 is provided with a first static contact 94, a first flow portion 95, a second flow portion 96, a third flow portion 97 and a fourth flow portion 98. The number of the first static contacts 94 is the same as and corresponds to the number of the first moving contacts 75 in the corresponding moving contact group 13. In this embodiment, the number of the first static contacts 94 is two and they are arranged along the Z-axis direction. The first static contact 94 is suitable for contacting or moving away from the corresponding first moving contact 75 along the Y-axis direction. Each first static contact 94 is fixedly connected to the first flow portion 95, and the first flow portion 95 extends along the Z-axis direction and is perpendicular to the Y-axis direction. The second flow portion 96 extends from the upper part of the left side of the first flow portion 95 along the X-axis direction away from the moving contact group 13 along the Y-axis direction, and the second flow portion 96 passes through the bottom shell 20 along the Y-axis direction and extends out of the front surface of the bottom shell 20. The second flow portion 96 is perpendicular to the X-axis direction. The third overcurrent portion 97 extends from the second overcurrent portion 96 along the Y-axis direction away from one end of the first overcurrent portion 95 to the left along the X-axis direction. The third overcurrent portion 97 is perpendicular to the Y-axis direction. The fourth overcurrent portion 98 extends from the bottom end of the third overcurrent portion 97 along the Z-axis along the Y-axis direction away from the first overcurrent portion 95. The fourth overcurrent portion 98 is perpendicular to the Z-axis direction. In this embodiment, the fourth overcurrent portion 98 forms a first load terminal 99. The first load terminal 99 is used for one phase of an external power supply or a load. For the convenience of introduction, the first load terminal 99 is set to an external power supply.

[0161] like Fig. 22As shown, in this embodiment, the second stationary contact member 93 is provided with a second stationary contact point 100, a fifth current-carrying portion 101, a sixth current-carrying portion 102, a reverse current-carrying portion 103, and a seventh current-carrying portion 104. The number of the second stationary contact points 100 is the same as and corresponds to the number of the second moving contact points 76 in the corresponding moving contact member group 13. In this embodiment, the number of the second stationary contact points 100 is two and they are arranged along the Z-axis direction. The second stationary contact points 100 are adapted to be contacted or separated from the corresponding second moving contact points 76 along the Y-axis direction. In this embodiment, the first stationary contact point 94 and the second stationary contact points 100 are arranged along the X-axis direction. Each of the second stationary contact points 76 is fixedly connected to the fifth current-carrying portion 101, and the fifth current-carrying portion 101 extends along the Z-axis direction and is perpendicular to the Y-axis direction. The sixth current-carrying portion 102 extends along the Y-axis direction from the upper part on the left side of the fifth current-carrying portion 101 along the X-axis direction, and the sixth current-carrying portion 102 is perpendicular to the X-axis direction. The reverse current-carrying portion 103 extends along the X-axis direction to the left from one end of the sixth current-carrying portion 102 away from the fifth current-carrying portion 101 along the Y-axis direction, and the reverse current-carrying portion 103 is perpendicular to the Y-axis direction. The seventh current-carrying portion 104 extends along the Y-axis direction away from the fifth current-carrying portion 101 from the bottom end of the reverse current-carrying portion 103 along the Z-axis direction. The seventh current-carrying portion 104 penetrates the bottom case 20 and extends out of the front surface of the bottom case 20. The seventh current-carrying portion 104 is perpendicular to the Z-axis direction. One end of the seventh current-carrying portion 104 away from the fifth current-carrying portion 101 forms a second load terminal 105. The second load terminal 105 is used for externally connecting one phase of a load or a power supply. For the convenience of introduction, it is assumed that the second load terminal 105 externally connects a load.

[0162] See Figure 2 and Fig. 27 , Figure 2 and Fig. 27 and Figure 2 show the second magnetic conductor group 16 in this embodiment. As Fig. 27 shown, the number of the second magnetic conductor group 16 is the same as and corresponds to that of the first magnetic conductor group 15. The second magnetic conductor group 16 and the first magnetic conductor group 15 are arranged oppositely along the Y-axis direction. In this embodiment, the number of the second magnetic conductor group 16 is three and they are arranged along the X-axis direction. The second magnetic conductor group 16 includes at least one second magnetic conductor 106. The number of the second magnetic conductors 106 may be the same as and correspond to the number of the first magnetic conductors 77 in the corresponding first magnetic conductor group 15, or may be different and not corresponding. In this embodiment, the second magnetic conductor group 16 includes one second magnetic conductor 106. The second magnetic conductor 106 extends along the Z-axis direction and is in a flat plate shape. As previously described, the second magnetic conductor 106 is accommodated in the accommodation cavity 22 and is fixed relative to the housing 18. Similar to the first magnetic conductor 77, the second magnetic conductor 106 may also be in an L shape or a C shape. As long as the first magnetic conductor group 15 and the second magnetic conductor group 16 can form a magnetic circuit. As Fig. 27 shown, in this embodiment, the second magnetic conductor 106 is coated with an insulator 107. In this embodiment, the insulator 107 is formed on the housing 18.

[0163] See also Figure 23 to Figure 27 , Figure 23 to Figure 27 The contact portion 5 in this embodiment is shown. As mentioned above, in this embodiment, the contact portion 5 includes a contact piece group 11 and an anti-short circuit unit 12. The number of the contact piece groups 11 and the anti-short circuit unit 12 is the same and corresponds. In this embodiment, the number of the contact piece groups 11 is three. Each contact piece group 11 includes a moving contact piece group 13 and a stationary contact piece group 14. Each anti-short circuit unit 12 includes a first magnetic conductive piece group 15 and a second magnetic conductive piece group 16.

[0164] like Fig.23 As shown, in this embodiment, in the same contact group 11, the moving contact group 13 is suitable for contacting or moving away from the static contact group 14 along the Y-axis direction. As mentioned above, when the armature assembly 10 is located in the first position, the moving contact group 13 moves away from the static contact group 14 along the Y-axis direction, the relay 1 is in the off state, and the electrical connection of the external circuit is turned off; when the armature assembly 10 is located in the second position, the moving contact group 13 contacts the static contact group 14 along the Y-axis direction, the relay 1 is in the on state, and the electrical connection of the external circuit is turned on. Specifically, each first moving contact 75 in the moving contact group 13 is suitable for contacting or moving away from each first static contact 94 in the static contact group 14 along the Y-axis direction, and each second moving contact 76 in the moving contact group 13 is suitable for contacting or moving away from each second static contact 100 in the static contact group 14 along the Y-axis direction.

[0165] like Fig.23 As shown, in this embodiment, the second magnetic conductor 106 is located between each first static contact 94 and each second static contact 100 in the corresponding static contact group 14 along the X-axis direction. The second magnetic conductor 106 is also located between the overcurrent bridge 73 and the reverse overcurrent portion 103 along the Y-axis direction. When the moving contact group 13 contacts the static contact group 14, the extension 79 of each first magnetic conductor 77 in the first magnetic conductor group 15 is close to the insulator 107 covering the second magnetic conductor group 16. The insulator 107 covering the second magnetic conductor group 16 is formed in the housing 18 and is located between the first static contact 92 and the second static contact 93 along the X-axis direction. The protrusions 23 provided on the insulator 107 are used to increase the creepage distance between the first static contact 92 and the second static contact 93 along the X-axis direction. Each protrusion 23 can also be a groove, and each protrusion 23 or groove can be one or more. When each protrusion 23 or groove is multiple, it is arranged along the X-axis direction. The extension direction of each protrusion 23 or groove intersects with the X-axis direction. In this embodiment, the protrusion 23 or groove extends along the Y-axis direction.

[0166] like Fig.24As shown, when the moving contact group 13 contacts the static contact group 14, the electrical connection between the power supply and the load is turned on. At this time, the current flow K is as shown in the figure, from the power supply through the first load terminal 99 (fourth overcurrent part 98), the third overcurrent part 97, the second overcurrent part 96, the first overcurrent part 95, the first static contact 94, the first moving contact 75, the overcurrent bridge 73, the second moving contact 76, the second static contact 100, the fifth overcurrent part 101, the sixth overcurrent part 102, the reverse overcurrent part 103, the seventh overcurrent part 104 and the second load terminal 105 to the load. At this time, the current passing through the overcurrent bridge 73 is to the right along the X-axis direction, and the current passing through the reverse overcurrent part 103 is to the left along the X-axis direction, and the current directions of the two are opposite. It can be seen from the right-hand screw theorem that the current passing through the overcurrent bridge 73 forms the third magnetic field L, and the current passing through the reverse overcurrent part 103 forms the fourth magnetic field M.

[0167] like Figure 25 to Figure 27 As shown, in the third magnetic field L formed by the overcurrent bridge 73, the two first magnetizers 77 and the second magnetizer 106 are magnetized and form two magnetic circuits. In the body 78 of the first magnetizer 77, the direction of the magnetic flux lines of the magnetic circuit is from bottom to top along the Z-axis direction, in the extension portion 79 of the first magnetizer 77 located at the upper part along the Z-axis direction, the direction of the magnetic flux lines of the magnetic circuit is from back to front along the Y-axis direction, and in the second magnetizer 106, the direction of the magnetic flux lines of the magnetic circuit is from top to bottom along the Z-axis direction, and in the extension portion 79 of the first magnetizer 77 located at the lower part along the Z-axis direction, the direction of the magnetic flux lines of the magnetic circuit is from front to back along the Y-axis direction. The magnetic circuit formed based on the third magnetic field L forms an attractive force between the first magnetizer 77 and the second magnetizer 106, and the greater the current, the greater the attractive force between the two. The fourth magnetic field M formed by the reverse current flow portion 103 affects the second magnetizer 106. The direction of the magnetic flux lines of the fourth magnetic field M on one side of the second magnetizer 106 is also from top to bottom along the Z-axis direction, which is the same as the direction of the magnetic flux lines of the magnetic circuit in the second magnetizer 106. Therefore, the attraction formed between the first magnetizer 77 and the second magnetizer 106 is stronger.

[0168] See also Fig.28 and Fig.29 , Fig.28 and Fig.29 The guide member 6 in this embodiment is shown. The guide member 6 is used to guide the linear motion of the push card 58 along the Y-axis direction. Fig.29As shown, the guide member 6 extends along the Y-axis direction. In this embodiment, the guide member 6 is made of metal. One of the push card 58 and the shell 18 is fixedly connected to the guide member 6, and the other of the two is slidably matched with the guide member 6 along the Y-axis direction. In this embodiment, the push card 58 is fixedly connected to the guide member 6, and the shell 18 is slidably matched with the guide member 6. The number of guide members 6 can be one or more. In this embodiment, the number of guide members 6 and the matching portion group 27 are the same and corresponding. The number of guide members 6 is two and is arranged along the X-axis direction. The guide member 6 passes through the corresponding mounting hole 68 on the push card 58 and is fixedly connected to the push card 58 by interference fit with the mounting hole 68. The guide member 6 is slidably matched with the two matching portions 28 in the corresponding matching portion group 27, specifically, with the guide groove. The position where the guide member 6 passes through the mounting hole 68 is located between the two matching portions 28 of the corresponding matching portion group 27 along the Y-axis direction.

[0169] See also Figure 29 to Figure 31 , Figure 29 to Figure 31 The elastic member 7 in this embodiment is shown. Fig.29 As shown, the elastic member 7 is mounted on the bottom shell 20 and is used to provide a pushing force when the armature assembly 10 moves from the first position to the second position. The number of elastic members 7 can be one or more. In this embodiment, the number of elastic members 7 is two. The two elastic members 7 are respectively located on both sides of the push card 58 along the X-axis direction and on the back side of the connecting portion 65. The elastic member 7 is fixed to the bottom shell 17 and has elasticity. In this embodiment, the elastic member 7 is also arranged corresponding to the guide member 6. When the moving contact group 9 moves in a direction away from the static contact group 10, the elastic member 7 stores energy due to deformation, and when the moving contact group 9 moves in a direction close to the static contact group 10, the deformation is restored to release energy. As shown Fig.30 As shown, the elastic member 7 is provided with a fixing portion 108, a first bending portion 109, a push surface 110 and an escape groove 111 which are connected to each other as a whole. The fixing portion 108 is fixedly connected to the bottom shell 20, and the first bending portion 109 is bent to make the elastic member 7 elastic. Fig.30 and Fig.31 As shown, the abutting surface 110 is used to abut against the back surface of the connecting portion 65. The avoidance groove 111 is for the corresponding guide member 6 to pass through, and is configured not to contact the guide member 6.

[0170] See also Fig.29 and Fig.32 , Fig.29 and Fig.32 FIG. 8 shows a micro switch 8 in this embodiment. The micro switch 8 in this embodiment is used to send a relay state signal to an external relay state sensing circuit. Fig.29 As shown, the micro switch 8 includes two fixed contacts 112 and a spring 113. Fig.32As shown, two fixed contacts 112 are arranged along the X-axis direction, the fixed contacts 112 are fixedly connected to the bottom shell 20 and extend along the Z-axis direction, and the two fixed contacts 112 are provided with a signal output terminal 114, which passes through the bottom shell 20 along the Z-axis direction and extends out of the bottom surface of the bottom shell 20 to be electrically connected to the relay state sensing circuit (see Figure 2 ). In this embodiment, the movable spring 113 is provided with a fixing portion 115, a second bending portion 116 and a bridging portion 117. The fixing portion 115 is fixed to the bottom shell 20, and the bridging portion 117 is used to conduct the two fixed contacts 112. The second bending portion 116 is located between the fixing portion 115 and the bridging portion 117 and is bent to make the movable spring 113 elastic. The movable spring 113 is suitable for being pushed by the pushing portion 66 and deformed to abut against the two fixed contacts 112, and restoring the deformation and moving away from the two fixed contacts 112 when the pushing portion 66 moves away. It can be seen from the above introduction that when the armature assembly 10 is in the first position, the pushing portion 66 pushes against the movable spring 113, causing the movable spring 113 to deform and abut against the fixed contact 112, so as to send a relay state signal that the relay 1 is in the off state to the relay state sensing circuit. When the armature assembly 10 is located at the second position, the abutting portion 66 moves away from the movable spring 113 , and the movable spring 113 recovers its deformation and moves away from the fixed contact 112 , so as to send a relay state signal indicating that the relay 1 is in the on state to the relay state sensing circuit.

[0171] The working principle of the relay 1 in this embodiment is introduced below, wherein the working principle of the magnetic circuit part 3 has been described above and will not be repeated here.

[0172] See also Fig.28 , Fig.28 Figure 2 shows the structure of relay 1 in the initial state. Fig.28 As shown, in the initial state, the relay 1 is in the off state. At this time, the armature assembly 10 is maintained in the first position. At this time, the moving contact group 13 is away from the static contact group 14 and presses against the limit member 61 in the direction toward the static contact group 14. The electrical connection between the first load terminal 99 and the second load terminal 105 is cut off, and the power supply cannot supply power to the load. The push card 58 presses against the elastic member 7 in the direction away from the static contact group 14, and the elastic member 7 deforms to store energy. The pushing portion 66 pushes against the moving spring 113, causing the moving spring 113 to deform and press against the two fixed contacts 112, and the two signal output terminals 114 are connected to each other, and the relay state sensing circuit senses that the relay 1 is in the off state.

[0173] When the signal input terminal 36 receives the first pulse signal, the coil winding 32 temporarily forms a first magnetic field, and the two magnetic drive ends 39 drive the armature assembly 10 to leave the first position and move along the Y-axis direction to the second position with a magnetic drive force. At this time, the elastic member 7 and the movable spring 113 restore the deformation and release energy. Under the action of the magnetic drive force of the two magnetic drive ends 39 and the elastic force of the elastic member 7 and the movable spring 113, the moving component 17 moves in the direction of the static contact member group 14 with acceleration. After the dynamic contact member group 13 contacts the static contact member group 14, the first load terminal 99 and the second load terminal 105 are electrically connected, and the power supply supplies power to the load through the relay 1. The armature assembly 10 and the push card 58 enter the overtravel under the magnetic drive force of the two magnetic drive ends 39 and continue to move in the direction of the static contact member 14. The elastic bracket group 60 begins to store energy, and the dynamic contact member group 13 no longer contacts the limit member 61 until the armature assembly 10 is limited by the two magnetic drive ends 39, and the armature assembly 10 moves to the second position.

[0174] See also Fig.25 , Fig.25 The structure of relay 1 in the on state is shown. Fig.25 As shown, when the armature assembly 10 moves to the second position, the moving contact group 13 abuts against the stationary contact group 14, the electrical connection between the first load terminal 99 and the second load terminal 105 is turned on, and the power supply supplies power to the load. The moving contact group 13 no longer abuts against the limit member 61, and the elastic bracket group 60 stores energy. The push card 58 moves away from the elastic member 7 to restore the elastic member 7 to its deformation, and the pushing portion 66 moves away from the moving spring 113, so that the moving spring 113 restores its deformation and moves away from the two fixed contacts 112. The two signal output terminals 114 are disconnected from each other, and the relay state sensing circuit senses that the relay 1 is in the on state. Fig.25 As shown, when the armature assembly 10 moves to the second position, the blocking portion 30 is close to the push card 58 to block the adjacent contact chambers 29. It should be noted that in other embodiments, the blocking portion 30 can also be provided on the push card 58, as long as it is located between the adjacent contact member groups 11 when the movable contact member group 13 contacts the stationary contact member group 14.

[0175] After the first pulse signal disappears, the relay 1 is kept in the on state due to the magnetic holding force of the magnetic circuit portion 3 .

[0176] When the signal input terminal 36 receives the second pulse signal, the coil winding 32 temporarily forms a second magnetic field, and the two magnetic drive ends 39 drive the armature assembly 10 to leave the second position and move along the Y-axis direction to the first position with a magnetic drive force. At this time, the elastic bracket group 60 recovers its deformation and releases energy. Under the action of the magnetic drive force of the two magnetic drive ends 39 and the elastic force of the elastic bracket group 60, the armature assembly 10 and the push card 58 move in a direction away from the static contact group 14 with acceleration until the moving contact group 13 leaves the static contact group 14, and the deformation of the elastic bracket group 60 is partially restored, and the moving contact group 13 is pushed against the limiter 61. At this time, the electrical connection between the first load terminal 99 and the second load terminal 105 is cut off, the relay 1 is in the off state, and the power supply cannot supply power to the load. Afterwards, the moving part 17 as a whole continues to move away from the static contact assembly 14, pushing the card 58 against the elastic member 7, causing the elastic member 7 to deform and store energy; the pushing portion 66 pushes against the movable spring 113, causing the movable spring 92 to deform and store energy and contact the two fixed contacts 112, and the two signal output terminals 114 are electrically conductive, and the relay state sensing circuit senses that the relay 1 is in the off state. Finally, the movement of the armature assembly 10 is limited by the two magnetic drive ends 39, and the armature assembly 10 moves to the position as shown in FIG. Fig.28 First position shown.

[0177] After the second pulse signal disappears, the relay 1 is kept in the off state due to the magnetic holding force of the magnetic circuit part 3.

[0178] The electric meter in this embodiment adopts the above-mentioned relay 1.

[0179] like Fig.33 As shown, the electric meter 1 in this embodiment also includes a mutual inductor 118. The mutual inductor 118 is used to convert a large current into a small current for measurement. In this embodiment, the number of the mutual inductors 118 is three, and the three mutual inductors 118 are arranged along the X-axis direction and are respectively installed on the parts of the second static contacts 93 of the three static contact groups 14 extending out of the accommodating member 2. In other embodiments, they can also be respectively installed on the parts of the first static contacts 92 of the three static contact groups 14 extending out of the accommodating member 2.

[0180] This embodiment makes a highly innovative improvement to the magnetic circuit portion 3 of the swing-type magnetic latching relay in the prior art. Based on the coil assembly 9 of the swing-type magnetic latching relay, this embodiment improves the two armatures 43 fixed to the permanent magnet 42 from being arranged in parallel to being arranged to cross each other and the cross-section 55 is arranged at intervals, so that the armature assembly 10 can be converted from swinging relative to the coil assembly 9 to linear motion relative to the coil assembly 9. Compared with the magnetic circuit portion 3 of the swing-type magnetic latching relay in the prior art, since the armature assembly 10 moves linearly relative to the coil assembly 9, there is no loss of the radial component of the swing stroke of the swing-type magnetic latching relay. Therefore, the space utilization rate of the relay 1 can be higher, and more favorable conditions can be created for increasing the safe distance between the moving contact 72 and the static contact 89 in a limited space. Compared with the magnetic circuit portion 3 of the direct-acting magnetic latching relay in the prior art, since the two magnetic drive ends 39 are arranged along the X-axis direction and the linear motion direction of the armature assembly 10 is the Y-axis direction perpendicular to the X-axis direction, the magnetic circuit portion 3 in this embodiment will not require a long length for the relay 1 in one direction (whether it is the X-axis direction or the Y-axis direction), which can make the relay 1 more easily adapt to limited space and create more favorable conditions for increasing the safety distance between the moving contact 72 and the static contact 89 in a limited space.

[0181] In this embodiment, since the two armatures in the armature assembly 10 are improved to cross each other on the basis of the coil assembly 9 of the swing-type magnetic latching relay, a first part of a magnetic circuit without any air gap can be formed between the two suction ends 50 of the armature assembly 10 through the permanent magnet 42 and the two armatures 43, and a second part of a magnetic circuit running through the entire coil assembly 9 can also be formed between the two magnetic drive ends 39 of the coil assembly 9. The first part and the second part can form a complete magnetic circuit regardless of whether they are in the magnetic holding state or the magnetic drive state. This complete magnetic circuit will not cause a large magnetic loss due to the large air gap between the two suction parts 50 of the armature assembly 10. Therefore, the magnetic loss is small and the magnetic efficiency is higher. Without increasing the power consumption of the coil assembly 9, it is beneficial to increase the movement stroke of the moving contact 72; and when the magnetic driving force is equivalent, the power consumption required for the coil assembly 9 to achieve magnetic drive can be reduced, which is beneficial to making the size of the coil assembly 9 smaller, thereby creating more favorable conditions for increasing the safe distance between the moving contact 72 and the static contact 89 in a limited space. In addition, the direct-acting magnetic latching relay in the prior art often forms two magnetic circuits that resist each other in the magnetic latching state, one of which passes through the yoke iron plate and the other passes through the static iron core. The magnetic forces of the two magnetic circuits on the moving iron core are in opposite directions. The magnetic circuits in this embodiment all run through the coil assembly 9, so the above-mentioned problem does not exist. Compared with the direct-acting magnetic latching relay in the prior art, the magnetic force during magnetic latching is greater, especially when the relay 1 is impacted by a large fault current, the armature assembly 10 is less likely to escape from the magnetic latching state and move, which is beneficial to avoid the moving contact 72 and the static contact 89 from being separated due to the fault current, resulting in destructive arcing.

[0182] In this embodiment, when the armature assembly 10 is in a magnetic holding state at the first position, when the coil assembly 9 is stimulated by a pulse electrical signal to reverse the polarity temporarily formed by the two magnetic drive ends 39, not only do the two magnetic drive ends 39 generate magnetic repulsion on the first suction part 51 and the third suction part 53, but also the fourth suction part 54 and the second suction part 52 form the first part of a pushing magnetic circuit without an air gap through the armature assembly 10, and the two magnetic drive ends 39 form the second part of the pushing magnetic circuit that runs through the entire coil assembly 9 through the coil assembly 9. The first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit. There is only a necessary travel air gap in the pushing magnetic circuit, and no other air gaps. Therefore, the magnetic efficiency is higher, and the two magnetic drive ends 39 have a stronger magnetic driving force on the armature assembly 10 under the same power consumption, which is more conducive to increasing the safety distance between the moving contact 72 and the static contact 89. Similarly, when the armature assembly 10 is in a magnetic holding state in the second position, when the coil assembly 9 is stimulated by a pulse electrical signal to reverse the temporarily formed polarity of the two magnetic drive ends 39, not only do the two magnetic drive ends 39 generate magnetic repulsion on the fourth suction part 54 and the second suction part 52, but also the first suction part 51 and the third suction part 53 form a first part of a pushing magnetic circuit without an air gap through the armature assembly 10, and the two magnetic drive ends 39 form a second part of a pushing magnetic circuit that runs through the entire coil assembly 9 through the coil assembly 9. The first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit, which also only has a necessary travel air gap and no other air gaps, and therefore has the same technical effect.

[0183] In this embodiment, when the armature assembly 10 is in the magnetic holding state at the second position and the moving contact 72 abuts against the static contact 89 to conduct the external circuit, the first part of the holding magnetic circuit without air gap is formed between the second suction part 52 and the fourth suction part 54 through the armature assembly 10, and the two magnetic drive ends 39 form the second part of the holding magnetic circuit that runs through the entire coil assembly 9 through the coil assembly 9. The first part and the second part of the holding magnetic circuit constitute a complete holding magnetic circuit, which is completely closed when the second suction part 52 and the fourth suction part 54 attract the two magnetic drive ends 39, and when the second suction part 52 and the fourth suction part 54 are set close to the two magnetic drive ends for other reasons, the air gap is also very small, so that the magnetic efficiency of the armature assembly 10 in the magnetic holding state can be improved, so that the magnetic holding suction force is greater and the reliability is higher. Especially when the relay 1 is impacted by a large fault current, the armature assembly 10 is less likely to get rid of the magnetic holding state and move, which is conducive to avoiding the destructive arcing caused by the separation of the moving contact 72 and the static contact 89 due to the fault current.

[0184] In this embodiment, for the two magnetic drive ends 39 arranged in the X direction, the magnetic fields of the two attracting parts 50 attracted or close to them are all from the same permanent magnet 42. Therefore, the armature assembly 10 is subjected to the same magnetic driving force in the process of moving from the first position to the second position or from the second position to the first position, and the difference is small. Therefore, the balance of the magnetic driving force of the relay 1 when switching on and off is better, the linear motion of the armature assembly 10 is less likely to be skewed, and the relay 1 is less likely to be stuck and has a longer service life.

[0185] In the present embodiment, since the first suction portion 51 and the second suction portion 52 are respectively located at the two ends of the first armature 48 along the X-axis direction, and the third suction portion 53 and the fourth suction portion 54 are respectively located at the two ends of the second armature 49 along the X-axis direction, the position where the first armature 48 is fixed to the permanent magnet 42 is located between the first suction portion 51 and the second suction portion 52, and the position where the second armature 49 is fixed to the permanent magnet 42 is also located between the third suction portion 53 and the fourth suction portion 54. With this arrangement, the difference in magnetic field strength between the two suction portions 50 of the same armature 43 is smaller, and when the armature assembly 10 is in a magnetically driven state, the difference in magnetic driving force of the coil assembly 9 in the two strokes is smaller. Secondly, since the first suction part 51 and the fourth suction part 54 are arranged along the Y-axis direction, the third suction part 53 and the second suction part 52 are arranged along the Y-axis direction, the first suction part 51 and the third suction part 53 are arranged along the X-axis direction, and the fourth suction part 54 and the second suction part 52 are arranged along the X-axis direction, the four suction parts 50 of the armature assembly 10 are respectively located at the four vertices of the rectangle on the first projection plane U, which is convenient for adjusting the dimensions of the armature assembly 10 along the X-axis direction and the Y-axis direction, and is more conducive to creating more favorable conditions for increasing the safety distance between the moving contact 72 and the static contact 89 in a limited space.

[0186] In this embodiment, when the armature assembly 10 is in the second position, the magnetic circuit portion 3 forms a closed magnetic circuit. Compared with the fourth suction portion 54 and the second suction portion 52 which are only close to the two magnetic drive ends 39, the magnetic circuit portion has smaller magnetic loss, stronger magnetic holding force, and stronger ability to resist fault current impact.

[0187] In this embodiment, the two magnetic drive ends 39 extend along the X-axis direction to limit the movement of the armature assembly 10 from the first position to the second position and / or from the second position to the first position, so that the movement stroke of the armature assembly 10 along the Y-axis direction is more certain, which is beneficial to ensure a safe distance between the moving contact 72 and the static contact 89.

[0188] In this embodiment, the axis of the coil winding 9 is perpendicular to the movement direction of the armature assembly 10. Such a layout is conducive to making room for the movement of the armature assembly 10 along the Y axis, making the structure of the entire magnetic circuit part 3 more compact and occupying less space, so it is conducive to creating more favorable conditions for increasing the safe distance between the moving contact 72 and the static contact 89 in a limited space. At the same time, in the above layout, when there are not many other components of the relay 1 in the axial direction of the coil winding 9, it is easier to make full use of the limited space, extend the axial length of the coil winding 9, and enable the coil winding 9 to output a greater magnetic field strength, thereby facilitating the increase of the magnetic driving force of the two magnetic drive ends 39, and creating more favorable conditions for increasing the safe distance between the moving contact 72 and the static contact 89 in a limited space.

[0189] In this embodiment, the two magnetic poles of the permanent magnet 42 are arranged along the Y-axis direction. Compared with the optional arrangement along the X-axis direction or the Z-axis direction, not only the contact area between the permanent magnet 42 and the two armatures 43 is larger and the magnetic conductivity effect is better, but also excessive bending of the two armatures 43 can be avoided, the structural complexity and manufacturing difficulty of the two armatures 43 can be reduced, and it is also beneficial to reduce the volume of the armature assembly 10.

[0190] In this embodiment, the two armatures 43 are provided with a narrower section 56 and a wider section 57, and the intersecting portions 55 are located in the narrower section 56, which is beneficial for not increasing the width of the armature assembly 10 along the Z-axis direction under the premise that the intersecting portions 55 are arranged at intervals along the Z-axis direction.

[0191] In the present embodiment, the position where the armature 43 and the permanent magnet 42 are fixedly connected is located in the wider section 57, which is beneficial for guiding the magnetic field of the permanent magnet 42 to the armature 43 more fully, making the magnetic force between the magnetic drive end 39 and the armature 43 stronger, thereby facilitating increasing the movement stroke of the armature assembly 10 along the Y-axis, thereby facilitating increasing the distance between the moving contact 72 and the static contact 89.

[0192] In this embodiment, the two wider sections 57 are located on both sides of the narrower section 56 along the X-axis direction, which is beneficial for obtaining a larger magnetic conductive cross section on both sides of the narrower section 56 along the X-axis direction.

[0193] In this embodiment, there are at least two permanent magnets 42, which are respectively located on both sides of the intersecting portions 55, and each armature 43 is fixedly connected to the magnetic poles of the same polarity of each permanent magnet 42. Compared with only one permanent magnet 42 and the permanent magnet 42 can only be located on one side of the intersecting portions 55, it is more conducive to maintaining the consistency of the magnetic field strength on both sides of the armature assembly 10 along the X-axis direction, the linear motion of the armature assembly 10 is less likely to be skewed, and the relay 1 is less likely to get stuck and has a longer service life.

[0194] In this embodiment, permanent magnets 42 are arranged on both sides of the intersecting parts 55, and the space occupied by the armature assembly 10 is fully utilized to increase the magnetic force between the magnetic drive end 39 and the armature assembly 10 without increasing the size of the armature assembly 10 in the Y-axis direction and the Z-axis direction, which is more conducive to increasing the safety distance between the moving contact 72 and the static contact 89. Since each permanent magnet 42 is connected together by two armatures 43, the difference in strength of the magnetic field of each permanent magnet 42 is effectively weakened on the two armatures 43, and the magnetic pushing force between the armatures 43 and the magnetic drive end 39 on both sides can be more balanced along the X-axis direction, so the relay 1 is less likely to get stuck and has a longer service life.

[0195] In this embodiment, when more than two permanent magnet components 42 are used, more than two magnetic circuits can be formed between the armature assembly 10 and the coil assembly 9, whether in the magnetic holding state or the magnetic driving state. The magnetic forces are greater because they are superimposed on each other. Compared with only one permanent magnet component 42, it is more conducive to increasing the distance between the moving contact 72 and the static contact 89.

[0196] In this embodiment, the projection of the armature assembly 10 on the first projection plane U is mirror-symmetric along the symmetry plane V perpendicular to the X-axis, so that the magnetic field strength of the armature assembly 10 on both sides along the X-axis direction is more consistent, and the center of gravity is easier to maintain on the symmetry plane V. The linear motion of the armature assembly 10 is less likely to be skewed, and the relay 1 is less likely to get stuck and has a longer service life.

[0197] In the embodiment, each moving contact 72 is provided with a current bridge 73, a first moving contact 75 and a second moving contact 76, and a first static contact 92 and a second static contact 93 are respectively electrically connected to an external circuit, so that the safety distance between the moving contact 72 and the static contact 89 is actually twice the distance between the moving contact 74 and the static contact 90, which is conducive to increasing the safety distance between the moving contact 72 and the static contact 89. This is because, in this embodiment, the safety distance between the moving contact 72 and the static contact 89 actually refers to the distance between the static contacts 90 of the two static contacts 89 when the moving contact 72 is away from the two static contacts 89, so the distance is twice the distance between the actual moving contact 74 on the moving contact 72 and the static contact 90 on the static contact 89. In addition, in the technical solution, the two static contacts 89 are respectively electrically connected to the external circuit, and compared with the moving contact 72 and the static contact 89 being respectively electrically connected to the external circuit, the electrical connection structure is simpler and the assembly is more convenient.

[0198] In this embodiment, the number of the moving contact groups 13 is at least two, so that the relay 1 can control the on and off of more external circuits.

[0199] In this embodiment, the number of the moving contact groups 13 is three, so that the relay 1 can simultaneously control the on and off of each phase of the three-phase alternating current, thereby improving safety.

[0200] In the present embodiment, each moving contact group 13 is arranged along the X-axis direction and contacts or moves away from the corresponding static contact group 14 along the Y-axis direction. Compared with the alternative scheme in which the arrangement direction of the moving contact group 13 is the same as the movement direction, it is more conducive to making full use of the limited space and creating more favorable conditions for increasing the safety distance between the moving contact 72 and the static contact 89; and the static contact group 14 corresponding to each moving contact group 13 is not blocked in the terminal lead-out direction, and is easier to lead out from the side of the accommodating member 2 to save copper loss.

[0201] The layout of this embodiment also allows the coil assembly 9, whose axis extends along the X-axis direction, to not need to be provided with contact parts 5 on both sides along the X-axis direction. Therefore, there is ample space for the coil assembly 9 in the axial direction, and the length of the coil assembly 9 can be increased in the X-axis direction as needed without increasing the overall size of the relay 1, thereby increasing the magnetic driving force and facilitating an increase in the safety distance between the moving contact 72 and the static contact 89.

[0202] In this embodiment, each moving contact group 13 includes at least two moving contacts 72. Therefore, when the external circuit is turned on, current can be carried through multiple moving contacts 72, which not only increases the number of moving contacts 74 and static contacts 90, but also each moving contact 72 is connected in parallel. The current carrying requirement of each moving contact 72 is reduced, and the contact resistance is also reduced accordingly. The relay 1 can better improve the load capacity.

[0203] In this embodiment, each moving contact 72 in each moving contact group 13 is arranged along the Z-axis direction, making fuller use of the space in the Z-axis direction to increase the load capacity. The first moving contact 75 and the second moving contact 76 of each moving contact 72 are arranged along the X-axis direction, and the corresponding first static contact 92 and the second static contact 93 in the static contact group 14 are also necessarily arranged along the X-axis direction. Since each moving contact group is arranged in the X-axis direction, all static contacts 72 are arranged in the X-axis direction, which facilitates all static contacts 72 to extend in the Y-axis direction or the Z-axis direction to lead the load terminal 91 out of the accommodating part 2. Therefore, the layout of each static contact 89 is more reasonable, which can better ensure the distance between adjacent static contacts 89, and is more conducive to making full use of limited space, creating more favorable conditions for increasing the safe distance between the moving contact 72 and the static contact 89. At the same time, since each static contact 89 is arranged in the X-axis direction, it is easier to install the mutual inductor 118 on the part where the static contact 89 leads out of the accommodating part.

[0204] In this embodiment, the static contact group 14 is arranged along the X-axis direction, and in the static contact group 14, two static contacts 89 are also arranged along the X-axis direction, so that the six static contacts 89 are all arranged along the X-axis direction, which is beneficial for connecting the static contacts 89 with the external circuit and facilitating the installation of the mutual inductor 118 on the static contacts 89.

[0205] In this embodiment, the first current flow portion 95 extends along the Z-axis direction, which is convenient for arranging the first static contact 94 along the Z-axis direction; the fifth current flow portion 101 extends along the Z-axis direction, which is convenient for arranging the second static contact 100 along the Z-axis direction.

[0206] In this embodiment, the second current passing portion 96 extends from the first current passing portion 95 along the Y-axis direction on one side away from the second static contact 93 along the X-axis direction, and the second current passing portion 96 is perpendicular to the X-axis direction, so that the second current passing portion 96 can provide a clearance space for installing the mutual inductor 118 on the second static contact 93.

[0207] In this embodiment, the third current passing portion 97 extends from one end of the second current passing portion 96 along the Y-axis direction away from the first current passing portion 95 and along the X-axis direction away from the second static contact 93, and the fourth current passing portion 98 extends from the bottom end of the third current passing portion 97 along the Z-axis direction along the Y-axis direction, which is convenient for connecting a power supply or a load and also convenient for making way for the installation of the transformer 118 for the seventh current passing portion 104.

[0208] In this embodiment, the reverse current portion 103 extends along the X-axis direction, and the seventh current portion 104 extends from the reverse current portion 103 along the Y-axis direction and is perpendicular to the Z-axis direction, so that the seventh current portion 104 and the adjacent first static contact 92 are close to each other, forming a sufficient interval to facilitate the installation of the mutual inductor 118, while facilitating the control of the size of the entire relay 1 along the X-axis direction.

[0209] In this embodiment, the seventh current-passing portion for installing the transformer 118 is perpendicular to the Z-axis direction, which facilitates the installation of the transformer 118 and enables the terminal of the transformer 118 to extend along the Z-axis direction.

[0210] In this embodiment, the mutual inductor 118 is suitable for being installed in the seventh current passing portion 104 of the second contact piece 93, so that the first static contact piece 92 will not protrude too much from the accommodating piece 2 along the X-axis direction, especially after the mutual inductor 118 is installed, it will not protrude too much, which is convenient for controlling the size of the entire relay 1 along the X-axis direction.

[0211] In this embodiment, the push card 58 is fixedly connected to the armature assembly 10 and each movable contact group 13 is installed on the push card 58 and carried by the push card 58, which can better convert the movement stroke of the armature assembly 10 along the Y-axis direction into the movement stroke of the movable contact 72, avoiding the loss of driving force and movement stroke. Compared with the swing-type magnetic latching relay in the prior art, it is precisely because of the use of the aforementioned magnetic circuit part 3 that the armature assembly 10 can be fixedly connected to the push card 58. At the same time, compared with the direct-acting magnetic latching relay in the prior art, it is precisely because of the use of the aforementioned magnetic circuit part 3 that the armature assembly 10 has a larger size in the X-axis direction perpendicular to its movement direction, rather than realizing linear motion through a push rod with a smaller diameter, and the push card 58 in this embodiment is used to install and carry each movable contact group 13. Therefore, when the movable contact group 13 is arranged along the X-axis direction, it can avoid the problem of jamming or the reduction of life due to severe wear.

[0212] In this embodiment, the push card 58 and the armature assembly 10 are insert-molded as one piece, which avoids errors that may occur during the assembly of the armature assembly 10 and the push card 58, and also makes the push card 58 and the armature assembly 10 more integrated with fewer parts, which is conducive to making full use of limited space.

[0213] In this embodiment, the dimension of the accommodating portion 64 along the X-axis direction is greater than the dimension along the Y-axis direction, and in each longitudinal section of the pushing card 58 perpendicular to the Y-axis direction, the dimension of the longitudinal section located in the accommodating portion 64 along the X-axis direction is the smallest among the dimensions of each longitudinal section of the pushing card 58 along the X-axis direction. Therefore, when each movable contact group 13 is arranged along the X-axis direction and the movable contact 72 is extended along the X-axis direction, it is less likely to get stuck than in the prior art.

[0214] In this embodiment, the connection portion 65 for mounting and carrying each movable contact group 13 extends along the X direction perpendicular to the movement direction of the push card 58, which is conducive to arranging the movable contact group 13 along the X-axis direction.

[0215] In this embodiment, the elastic bracket group 60 stores energy when the moving contact group 13 contacts the static contact group 14, and releases energy when the moving contact group 13 moves away from the static contact group 14, which can effectively generate additional repulsive force between the moving contact group 13 and the static contact group 14 when controlling the external circuit to be turned off, and help the moving contact group 13 move away from the static contact group 14. In particular, when an anti-short circuit unit 12 for resisting large fault current is also provided between the moving contact group 13 and the static contact group 14, when the moving contact group 13 contacts the static contact group 14, the current flowing through the moving contact 72 forms a magnetic circuit on the anti-short circuit unit 12, thereby generating suction force between the moving contact group 13 and the static contact group 14. At this time, the repulsive force formed by the elastic force of the elastic bracket group 60 can offset or partially offset the corresponding suction force when the load current is normal, thereby helping the moving contact group 13 move away from the static contact group 14.

[0216] In this embodiment, the elastic support group 60 includes an elastic support 80, and the number of elastic support parts 82 is the same as and corresponds to the number of moving contacts 72 in the moving contact group 13. Each moving contact 72 is installed on a corresponding elastic support part 82. Therefore, each moving contact 72 can adjust its posture by a relatively independent elastic support part 82, which is more conducive to the first moving contact 75 and the second moving contact 76 on the moving contact 72 to reliably contact the corresponding static contact group 14.

[0217] In this embodiment, the elastic support portion 82 includes two elastic arms 84 fixedly connected to the current bridge 73, which is conducive to the movable contact member 72 to swing freely to adjust the posture.

[0218] In this embodiment, the positions where the two elastic arms 84 are fixed to the current bridge 73 are located on the back of the first moving contact 75 and the second moving contact 76 respectively, so that the elastic force of the two elastic arms 84 can directly act on the two moving contacts 74, and can further ensure that the two moving contacts 74 reliably contact the corresponding static contacts 89.

[0219] In this embodiment, the limit member 61 is fixed relative to the push card 58 and abuts against each moving contact 72 along the Y-axis direction when the corresponding moving contact group 13 is away from the static contact group 14 to limit the distance between each moving contact 72 and the static contact group 14. Therefore, the setting of the limit member 61 can ensure a safe distance between each moving contact 72 and the static contact group 14, and can avoid the problem of the distance between some moving contacts 72 and the static contact group 14 being too close due to the inconsistent elasticity of the elastic bracket group 60.

[0220] In this embodiment, the limiting portion 70 of the push card 58 and the adapting portion 83 of the bracket body 81 only need to slide together, and the movement of the elastic bracket 80 along the Y axis is limited by the limiting member 61, so the installation of the elastic bracket 80 is simpler.

[0221] In this embodiment, the first guide portion 26 and the second guide portion 67 slide together along the Y-axis direction, which can guide the linear motion of the push card 58 to avoid jamming and skewness of the push card 58 during movement, and can effectively ensure that each moving contact member 72 reliably contacts the static contact member 89.

[0222] In this embodiment, the second guide portion 67 is located in the middle of the push card 58 along the X-axis direction, which is closer to the center of mass of the entire moving component, and is more conducive to guiding the movement of the push card 58 to avoid jamming and skewing of the push card 58 during movement.

[0223] In this embodiment, the elastic member 7 stores energy due to deformation when the movable contact member group 13 moves away from the stationary contact member group 14, and releases energy due to recovery deformation when the movable contact member group 13 moves toward the stationary contact member group 14, which can better help the movable member 17 to move from the first position to the second position. This is beneficial to increase the movement stroke of the movable contact member 72, and therefore also beneficial to increase the safety distance between the movable contact member 72 and the stationary contact member 89.

[0224] In this embodiment, by providing the anti-short circuit unit 12, the first magnetic conductive group 15 and the second magnetic conductive group 16 can form a magnetic circuit when current passes through the movable contact group 13, so that an attraction force is formed between the first magnetic conductive group 15 and the second magnetic conductive group 16. The larger the current, the larger the attraction force, so that the movable contact group 13 can be prevented from being separated from the static contact group 14 when a large fault current impacts the contact part 5, thereby preventing destructive arcing.

[0225] In this embodiment, the first magnetic conductive group 13 is at least partially located on the back of the overcurrent bridge 73, and the second magnetic conductive group 16 is at least partially located between the overcurrent bridge 73 and the reverse overcurrent portion 103, so that not only can the current of the moving contact 72 form a magnetic circuit between the first magnetic conductive group 15 and the second magnetic conductive group 16, but also because the current direction of the reverse overcurrent portion 103 is opposite to that of the moving contact 72, the direction of the magnetic flux lines of the magnetic field generated by it on the side where the second magnetic conductive group 16 is located is the same as the direction of the magnetic flux lines of the magnetic field generated by the overcurrent bridge 73 on the side where the second magnetic conductive group 16 is located, thereby strengthening the magnetic field strength of the second magnetic conductive group 16, making the magnetic attraction between the second magnetic conductive group 16 and the first magnetic conductive group 15 stronger, and making it more difficult for the moving contact group 15 and the static contact group 16 to separate under a large fault current, so that the reliability of the relay 1 is higher and the ability to resist large current shocks is stronger. Since the push card 58 and the armature assembly 10 are insert-molded as one, they have good integrity. The push card 58 and the armature assembly 10 must move synchronously and have high movement stability. Therefore, when the armature assembly 10 moves linearly along the Y-axis direction, the push card 58 can also move linearly along the Y-axis direction, and ensure that the moving contact group 13 and the first magnet group 15 driven by the push block 58 can also move linearly along the Y-axis direction, so that the first magnet group 15 can move stably and form a stable relative position relationship with the second magnet group 16 when the moving contact group 13 and the static contact group are closed, and reliably form an expected smaller magnetic gap with the second magnet group 16, ensuring that there is a stable and reliable magnetic attraction effect between the first magnet group 15 and the second magnet group 16, so that the moving contact group 13 and the static contact group 14 are not easy to separate under large fault current.

[0226] In this embodiment, the second magnetic conductive group 16 is covered by the insulator 107 to increase the creepage distance between the two static contacts 89 on both sides of the same second magnetic conductive group 16 so that the two static contacts 89 will not be easily short-circuited due to the second magnetic conductive group 16.

[0227] In this embodiment, the insulator 107 is formed in the receiving part 2 , which occupies less space and has a higher degree of integration of the relay compared to providing a separate insulator 107 .

[0228] In this embodiment, since a protrusion 23 or a groove is provided on the outer surface of the insulator 107 covering the second magnetic conductor group 16, the creepage distance between the two static contacts 89 can be increased, and the two static contacts 89 are less likely to be conducted through the surface of the insulator 107, so short circuit is less likely to occur.

[0229] In this embodiment, the extension direction of the protrusion 23 and the groove intersects or is even perpendicular to the arrangement direction of the two static contacts 89 , which can effectively increase the creepage distance between the two static contacts 89 .

[0230] In this embodiment, the first magnetizer 77 is disposed corresponding to the movable contact 72, the magnetic circuit has a higher constraint on the magnetic field generated by the current flowing through the movable contact 72, the magnetic loss is smaller, and the attraction between the first magnetizer 77 and the second magnetizer 106 is greater. The first magnetizer 77 is fixedly connected to the movable contact 72, making the installation of the first magnetizer 77 more convenient.

[0231] In this embodiment, the two extension portions 79 span the moving contact 72 and are close to the second magnetic conductor group 16 when the moving contact 72 contacts the two static contacts 89. Therefore, when the first magnetic conductor group 15 and the second conductor group 16 form a magnetic circuit, the air gap is smaller and the attraction between the first magnetic conductor group 15 and the second conductor group 16 is greater.

[0232] In this embodiment, the second magnetic conductor group 16 has only one second magnetic conductor 107, so the installation is more convenient.

[0233] In this embodiment, the insulator 107 is formed in the receiving part 2 , which occupies less space and has a higher degree of integration of the relay 1 than providing the insulator 107 separately.

[0234] In this embodiment, the second magnetic conductive body set 16 is fixedly connected to the receiving cavity 22 of the bottom shell 20, so that the second magnetic conductive body set is easier to install.

[0235] In this embodiment, a barrier 30 is provided between adjacent contact cavities to prevent a short circuit between adjacent static contact groups 14, which causes a short circuit between two phases of the three-phase AC power, and to prevent arcing from being conducted to other contact groups 11 when arcing occurs in some contact groups 11, causing a short circuit between two phases. In other embodiments, the barrier 30 is provided on the push card 58, which can also play a corresponding role.

[0236] In this embodiment, when the movable contact assembly 13 contacts the stationary contact assembly 14 , the barrier 30 separates the adjacent contact cavities 29 , so the barrier 30 has a better barrier effect.

[0237] In this embodiment, the barrier 30 is formed on the accommodating part 2 and is a part of the accommodating part 2. It can be integrally injection molded when manufacturing the accommodating part 2, so it has high integration and is easier to manufacture. The barrier 30 formed on the push card 58 also has a similar effect.

[0238] In this embodiment, when the movable contact group 13 contacts the stationary contact group 14, the barrier portion 30 separates the adjacent contact cavities 29. Therefore, the barrier portion 30 has a better barrier effect.

[0239] In this embodiment, a plurality of partition cavities 25 are respectively provided on both sides of the coil accommodating cavity 24 along the X-axis direction. Therefore, the coil accommodating cavity 24 can be increased in size along the X-axis direction as needed to facilitate the installation of the coil assembly 9 with a longer coil winding 32.

[0240] In this embodiment, the guide member 6 extends along the Y-axis direction, one of the accommodating member 2 and the pushing card 58 is fixedly connected to the guide member 6, and the other one of the two is slidably matched with the guide member 6, which can also guide the linear motion of the pushing card 58.

[0241] In this embodiment, two guide members 6 are arranged on both sides of the push card 58 along the X-axis direction. No matter which side the movement direction of the push card 58 may be skewed to, it can be effectively guided, thereby better preventing the moving component 17 from getting stuck or skewed.

[0242] In this embodiment, the position where the guide member 6 and the push card 58 are slidably matched or fixedly connected is located between the two matching parts 70 of the corresponding matching part group 69 along the Y-axis direction, which is conducive to keeping the guide member 6 extending along the Y-axis direction during assembly and not tilting or shaking along the X-axis. Moreover, when the gravity direction is the Z-axis direction, it can also carry the guide member 6, and carry the moving part 17 formed by the armature assembly 10, the push card 58 and each moving contact group 13 through the guide member 6. Especially when the number of the moving contact group 13 is three and they are arranged along the X-axis direction, the weight of the moving part 17 is relatively large. Therefore, the two matching parts 70 in the matching part group 69 carry the moving part 17 in the gravity direction of the moving part 17, so that the moving part 17 will not be skewed in the gravity direction.

[0243] In this embodiment, the elastic member 7 stores energy due to deformation when the movable contact member group 13 moves away from the stationary contact member group 14, and releases energy due to recovery deformation when the movable contact member group 13 moves toward the stationary contact member group 14, which can better help the movable member 17 to move from the first position to the second position. This is beneficial to increase the movement stroke of the movable contact member 72, and therefore also beneficial to increase the safety distance between the movable contact member 72 and the stationary contact member 89.

[0244] In this embodiment, by providing a micro switch 8 and enabling the action of the push card 58 to act on the micro switch 8 , the state of the relay 1 can be transmitted to the relay state sensing circuit via the micro switch 8 .

[0245] The above specification and description of the embodiments are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application.

Claims

1. A relay, characterized in that include: An armature assembly, which moves along the Y-axis direction; A push card, which is integrally formed by injection molding with the armature assembly insert; A stationary contact assembly, which is provided with a reverse flow portion; A movable contact group, which is the same in number and corresponds to the static contact group, the movable contact group is arranged on the push card and is carried by the push card to contact or move away from the static contact group along the Y-axis direction, and the flow direction of the movable contact group is opposite to the flow direction of the reverse flow part along the X-axis direction; and An anti-short circuit unit includes a first magnetic conductive group fixed relative to a moving contact group and a second magnetic conductive group fixed relative to a stationary contact group. The first magnetic conductive group and the second magnetic conductive group form a magnetic circuit when current flows through the moving contact group, so that the first magnetic conductive group and the second magnetic conductive group form an attractive force along the Y-axis direction; the second magnetic conductive group is at least partially located between the moving contact group and the reverse current flowing part along the Y-axis direction.

2. A relay as claimed in claim 1, characterized in that: The static contact group includes two static contacts arranged along the X-axis direction, and the reverse current flow portion is formed on one of the two static contacts; the dynamic contact group includes at least one dynamic contact, which is suitable for contacting or moving away from the two static contacts and is provided with a current flow bridge extending along the X-axis direction; the second magnetic conductor group is at least partially located between the current flow bridge and the reverse current flow portion.

3. A relay as claimed in claim 2, characterized in that: The number of the movable contact member groups is at least two, each movable contact member group is arranged along the X-axis direction, and each stationary contact member group is arranged along the X-axis direction.

4. A relay as claimed in claim 3, characterized in that: The number of the movable contact groups is three.

5. A relay as claimed in claim 2, characterized in that: The movable contact member group includes at least two movable contacts, and each movable contact member is arranged at intervals along the Z-axis direction.

6. A relay as claimed in claim 2, characterized in that: The first magnetic conductive group and the second magnetic conductive group are arranged along the Y-axis direction.

7. A relay as claimed in claim 2, characterized in that: The first magnetic conductor group includes at least one first magnetic conductor, and the first magnetic conductor is provided with a body, and the body is located on the back side of the current bridge away from the static contact group.

8. A relay as claimed in claim 7, characterized in that: The first magnetic conductor is further provided with an extension portion, which extends from the main body along the Y-axis direction. When the movable contact member group contacts the stationary contact member group, the extension portion approaches the second magnetic conductor group along the Y-axis direction.

9. A relay as claimed in claim 2, characterized in that: The two stationary contacts are respectively provided with stationary contacts, and the second magnetic conductive body group is located between the stationary contacts of the two stationary contacts along the X-axis direction.

10. A relay as claimed in claim 1, characterized in that: It also includes a coil assembly, which 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.

11. A relay as claimed in claim 2, characterized in that: The push card includes a receiving portion and a connecting portion; the receiving portion is used to receive the armature assembly, and the connecting portion is used to install and carry the moving contact assembly.

12. A relay as claimed in claim 11, characterized in that: The number of the movable contact groups is at least two, each movable contact group is arranged along the X-axis direction, and the connecting portion extends along the X-axis direction.

13. A relay as claimed in claim 12, characterized in that: Along the X-axis direction, the accommodating portion is located in the middle position relative to the connecting portion; in each longitudinal section of the pushing card perpendicular to the Y-axis direction, the dimension of the longitudinal section located in the accommodating portion along the X-axis direction is the smallest among the dimensions of each longitudinal section of the pushing card along the X-axis direction.

14. A relay as claimed in claim 2, characterized in that: It also includes an elastic bracket group, the number of which is the same as and corresponds to the number of the moving contact group. The elastic bracket group is arranged on the pushing card. When the moving contact group contacts the static contact group, the elastic bracket group stores energy. When the moving contact group moves away from the static contact group, the elastic bracket group releases energy.

15. A relay as claimed in claim 14, characterized in that: The elastic bracket group includes an elastic bracket, and the elastic bracket includes a bracket body and an elastic support part which are connected to each other as a whole. The bracket body is fixed relative to the push card, and the elastic support part is the same in number and corresponds to the corresponding moving contacts in the moving contact group. Each moving contact in the moving contact group is installed on the corresponding elastic support part.

16. A relay as claimed in claim 15, characterized in that: The elastic support portion includes two elastic arms, and the two elastic arms are both fixedly connected to the current bridge.

17. A relay as claimed in claim 16, characterized in that: The moving contact piece is provided with two moving contact points along the X-axis direction, and the positions where the two elastic arms are fixed to the overcurrent bridge are respectively located on the back of the corresponding moving contact points.

18. A relay as claimed in claim 15, characterized in that: It also includes a limit piece, which is the same in number and corresponds to the movable contact group. The limit piece is fixed relative to the push card and abuts against each movable contact along the Y-axis direction when the corresponding movable contact group is away from the static contact group to limit the distance between each movable contact and the static contact group.

19. A relay as claimed in claim 18, characterized in that: The push card is provided with a limiting portion, and the bracket body is provided with an adapting portion. The limiting portion and the adapting portion slide and cooperate with each other along the Y-axis direction and limit the movement of the bracket body perpendicular to the Y-axis direction; the limiting member limits the bracket body along the Y-axis direction by abutting against each moving contact member.

20. A relay as claimed in claim 2, characterized in that: It also includes a receiving member, which receives the armature assembly, the pusher, the stationary contact group, the moving contact group and the anti-short circuit unit, and the stationary contact group is fixedly connected to the receiving member.

21. A relay as claimed in claim 20, characterized in that: In the static contact member group, two static contacts extend out of the front surface of the accommodating member along the Y axis respectively.

22. A relay as claimed in claim 20, characterized in that: The two stationary contacts are respectively a first stationary contact and a second stationary contact; the second stationary contact is provided with a seventh flow-through portion, the seventh flow-through portion extends along the Y-axis direction and extends out of the accommodating member; the seventh flow-through portion is perpendicular to the Z-axis direction.

23. A relay as claimed in claim 22, characterized in that: The seventh current passage is suitable for installing a mutual inductor.

24. A relay as claimed in claim 23, characterized in that: The first static contact is provided with a first static contact point, a first current flowing portion and a second current flowing portion; the first static contact point is fixedly connected to the first current flowing portion; the second current flowing portion extends from a side of the first current flowing portion away from the second static contact point along the X-axis direction along the Y-axis direction and extends out of the accommodating member, and the second current flowing portion is perpendicular to the X-axis direction.

25. A relay as claimed in claim 24, characterized in that: The first flow portion extends along the Z-axis direction.

26. A relay as claimed in claim 25, characterized in that: The first static contact is also provided with a third flow portion and a fourth flow portion, the third flow portion extending from one end of the second flow portion along the Y-axis direction away from the first flow portion along the X-axis direction away from the second static contact; the fourth flow portion extends from the bottom end of the third flow portion along the Z-axis direction along the Y-axis direction away from the first flow portion.

27. A relay as claimed in claim 23, characterized in that: The reverse flow portion is arranged on the second static contact, and the second static contact is also provided with a second static contact point, a fifth flow portion and a sixth flow portion; the second static contact point is fixedly connected to the fifth flow portion; the sixth flow portion extends from the side of the fifth flow portion close to the first static contact along the X-axis direction and away from the moving contact group along the Y-axis direction; the reverse flow portion extends from one end of the sixth flow portion away from the fifth flow portion along the Y-axis direction and close to the first static contact along the X-axis direction; the seventh flow portion extends from the reverse flow portion along the Y-axis direction.

28. A relay as claimed in claim 20, characterized in that: The accommodating member is provided with a first guide portion; the middle portion of the pushing card along the X-axis direction is provided with a second guide portion; the first guide portion and the second guide portion are slidably matched along the Y-axis direction.

29. A relay as claimed in claim 28, characterized in that: One of the first guide portion and the second guide portion is a guide groove extending along the Y-axis direction, and the other is a guide protrusion extending along the Z-axis direction. The guide protrusion is inserted into the guide groove and slides relative to the guide groove along the Y-axis direction.

30. A relay as claimed in claim 20, characterized in that: It also includes a guide member, which extends along the Y-axis direction; one of the pushing card and the accommodating member is fixedly connected to the guide member, and the other one of the pushing card and the accommodating member is slidably matched with the guide member along the Y-axis direction.

31. A relay as claimed in claim 30, characterized in that: The accommodating member is provided with a mating portion group corresponding to the guide member, each mating portion group includes at least two mating portions, and the mating portions in the same mating portion group are arranged along the Y-axis direction; the position where the guide member and the push card are slidably matched or fixedly connected is located between the two mating portions of the corresponding mating portion group along the Y-axis direction.

32. A relay as claimed in claim 30, characterized in that: The number of the guide members is two.

33. A relay as claimed in claim 32, characterized in that: The two guide members are respectively located on two sides of the push card along the X-axis direction.

34. A relay as claimed in claim 20, characterized in that: It also includes a micro switch, which is provided with a dynamic spring and a fixed contact piece, the fixed contact piece is fixedly connected to the accommodating piece, the pushing card is provided with a pushing portion, the dynamic spring is suitable for being pushed by the pushing portion and deformed to resist the fixed contact piece, and restores the deformation and moves away from the fixed contact piece when the pushing portion moves away.

35. A relay as claimed in claim 20, characterized in that: It also includes an elastic member, which is installed on the accommodating member. The elastic member stores energy when the movable contact group moves away from the stationary contact group and releases energy when the movable contact group moves toward the stationary contact group.

36. A relay as claimed in claim 35, characterized in that: The number of the elastic members is two, and the two elastic members are respectively located on two sides of the pushing card along the X-axis direction.

37. A relay as claimed in claim 20, characterized in that: It also includes a barrier portion, the accommodating member is provided with contact cavities whose number is the same as and corresponds to the number of moving contact groups, the contact cavities are used for the corresponding moving contact groups to contact or stay away from the static contact groups; the barrier portion extends along the Y-axis direction; the barrier portion is made of insulating material and is located between adjacent contact cavities.

38. A relay as claimed in claim 37, characterized in that: When the moving contact group contacts the stationary contact group, the blocking portion blocks adjacent contact cavities.

39. A relay as claimed in claim 20, characterized in that: The accommodating component is provided with an accommodating cavity, and the second magnetic conductive body group is fixedly connected in the accommodating cavity.

40. An electric meter, characterized in that: It comprises a relay as claimed in any one of claims 1 to 39.

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