Contact part, relay and electricity meter

Abstract

The present application discloses a contact part, a relay and an electricity meter. The contact part comprises a static contact group, a moving contact group, and an anti-short-circuit unit; the static contact group is provided with a reverse overcurrent part; the moving contact group abuts against or is away from the static contact group in the Y-axis direction, and the overcurrent direction of the moving contact group is opposite to the overcurrent direction of the reverse overcurrent part in the X-axis direction; the anti-short-circuit unit comprises a first magnetic conductor group fixed relative to the moving contact group and a second magnetic conductor group fixed relative to the static contact group, the first magnetic conductor group and the second magnetic conductor group form a magnetic loop when the moving contact group has overcurrent, and the second magnetic conductor group is at least partially located between the moving contact group and the reverse overcurrent part in the Y-axis direction. The relay and the electricity meter comprise the contact part. According to the technical solution, compared with a contact part in the prior art, when the contact part is impacted by a fault large current, the moving contact group and the static contact group are not easily separated.

Description

Contact part, relay and electric meter

[0001] This application claims priority to the Chinese patent application filed with the Patent Office of China on March 19, 2024, with application number 202410316486.3 and application name “A contact part, relay and electric meter”, the entire contents of which are incorporated by reference into this application. 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 portion of a conventional relay 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 adapted to contact or move away from the stationary contact group to control the on / off of an external circuit. A conventional short-circuit protection unit 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 and second magnetic conductive groups are arranged along the direction of motion of the moving contact group. When an overcurrent flows through the moving contact group, the current passing through the moving contact group forms a magnetic circuit between the first and second magnetic conductive groups. This magnetic circuit creates a magnetic attraction between the first and second magnetic conductive groups. This magnetic attraction increases with increasing current flowing through the moving contact group. The short-circuit protection unit is primarily used to prevent the moving and stationary contact groups from separating due to the magnetic repulsion created by the contraction current between the contacts when the relay is subjected to a high fault current. Separation of the moving and stationary contact groups under high fault current conditions would generate a destructive arc.

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

[0005] Application Contents

[0006] The purpose of this application is to overcome the above-mentioned defects or problems in the background technology and to provide a contact part, a relay and an electric meter, which, compared with the existing technology, are less likely to separate the moving contact group and the static contact group under large fault current.

[0007] The present application provides a contact part, which includes: a static contact group, which is provided with a reverse flow portion; a dynamic contact group, which contacts or moves away from the static contact group along the Y-axis direction, and its flow direction is opposite to the flow direction of the reverse flow portion along the X-axis direction; and an anti-short circuit unit, which includes a first magnetic conductive group fixed relative to the dynamic 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 forming a magnetic circuit when the dynamic contact group flows, so that the first magnetic conductive group and the second magnetic conductive group form an attractive force along the Y-axis direction to make the dynamic contact group contact the static contact group; the second magnetic conductive group is at least partially located between the dynamic contact group and the reverse flow portion along the Y-axis direction.

[0008] According to some embodiments of the present application, the static contact group includes two static contacts arranged along the X-axis direction, and the reverse 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 flow bridge extending along the X-axis direction, and the second magnetic conductor group is at least partially located between the flow bridge and the reverse flow portion along the Y-axis direction.

[0009] According to some embodiments of the present application, 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; the seventh flow portion is perpendicular to the Z-axis direction.

[0010] According to some embodiments of the present application, the seventh current flow portion can be used for installing a mutual inductor.

[0011] According to some embodiments of the present application, the first static contact is provided with a first static contact point, a first flow portion and a second flow portion; the first static contact point is fixedly connected to the first flow portion; the first flow portion extends along the Z-axis direction; the second flow portion extends from the first flow portion along the X-axis direction away from the side of the second static contact point along the Y-axis direction, and the second flow portion is perpendicular to the X-axis direction.

[0012] According to some embodiments of the present application, the first static contact member is further provided with a third flow portion and a fourth flow portion, the third flow portion extending from the second flow portion along the Y-axis direction away from one end of the first flow portion and along the X-axis direction away from the second static contact member; 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.

[0013] According to some embodiments of the present application, the reverse flow portion is arranged on the second static contact, and the second static contact is also provided with a second static contact, a fifth flow portion and a sixth flow portion; the second static contact is fixed 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.

[0014] According to some embodiments of the present application, the first magnetic conductive group and the second magnetic conductive group are arranged along the Y-axis direction, the first magnetic conductive group includes at least one first magnetic conductive body, and the first magnetic conductive body is provided with a body, which is located on the back side of the overcurrent bridge away from the static contact group.

[0015] According to some embodiments of the present application, 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 group contacts the static contact group, the extension portion approaches the second magnetic conductor group along the Y-axis direction.

[0016] According to some embodiments of the present application, the two static contacts are respectively provided with a static contact point, and the second magnetic conductive body group is located between the static contact points of the two static contacts along the X-axis direction.

[0017] According to some embodiments of the present application, the second magnetic conductive body group is covered by an insulator.

[0018] According to some embodiments of the present application, a protrusion or a groove is provided on the outer surface of the insulator, and an extension direction of the protrusion or the groove intersects with the X-axis direction.

[0019] The present application also provides a relay, which includes a receiving member and the contact portion as described above, wherein the receiving member is used to receive the contact portion; the static contact group extends out of the front surface of the receiving member along the Y-axis direction.

[0020] According to some embodiments of the present application, it also includes an armature assembly and a push card; the armature assembly moves along the Y-axis direction; the push card is fixedly connected to the armature assembly as a whole; the moving contact assembly is arranged on the push card and is carried by the push card to contact or move away from the static contact assembly along the Y-axis direction.

[0021] According to some embodiments of the present application, the number of the movable contact groups is at least two, each of the movable contact groups is arranged along the X-axis direction, and each of the static contact groups is arranged along the X-axis direction.

[0022] According to some embodiments of the present application, the number of the movable contact groups is three.

[0023] According to some embodiments of the present application, the movable contact member group includes at least two movable contacts, and the movable contacts are arranged at intervals along the Z-axis direction.

[0024] According to some embodiments of the present application, the push card includes a receiving portion and a connecting portion; the receiving portion is used to receive the armature assembly and is injection molded as one piece with the armature assembly insert, and the connecting portion is used to install and support the moving contact group, and the connecting portion extends along the X-axis direction.

[0025] According to some embodiments of the present application, in each longitudinal section of the push card perpendicular to the Y-axis direction, the dimension of each longitudinal section located in the accommodating portion along the X-axis direction is the smallest among the dimensions of each longitudinal section of the push card along the X-axis direction.

[0026] According to some embodiments of the present application, one side of the accommodating portion along the Y-axis direction is connected to a middle position of the connecting portion along the X-axis direction.

[0027] According to some embodiments of the present application, a coil assembly is further included, which is located on the side of the contact portion away from the front surface of the accommodating member along the Y-axis direction. 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.

[0028] According to some embodiments of the present application, the armature assembly includes a permanent magnet and two armatures, the two armatures are respectively fixed to the two magnetic poles of the permanent magnet, the two armatures are respectively a first armature and a second armature, the first armature is provided with a first attraction part and a second attraction part, the second armature is provided with a third attraction part and a fourth attraction part; the armature assembly moves along the Y-axis direction between a first position and a second position; in the first position, the first attraction part and the third attraction part are respectively attracted or close to the two magnetic drive ends, and in the second position, the fourth attraction part and the second attraction part are respectively attracted or close to the two magnetic drive ends.

[0029] According to some embodiments of the present application, the coil assembly includes a coil winding, the coil winding extends along the X-axis direction, and the two magnetic drive ends are arranged along the X-axis direction; the projections of the first armature and the second armature on a first projection plane perpendicular to the Z-axis direction intersect with each other, and the intersecting parts are arranged at intervals along the Z-axis direction.

[0030] According to some embodiments of the present application, a guide member is further included, 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 engaged with the guide member along the Y-axis direction.

[0031] According to some embodiments of the present application, there are two guide members, and the two guide members are respectively located at the edge positions on both sides of the push card along the X-axis direction.

[0032] According to some embodiments of the present application, 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 mated or fixedly connected is located between the two mating portions of the corresponding mating portion group along the Y-axis direction.

[0033] According to some embodiments of the present application, each of the mating parts is provided with a mating groove extending along the Y-axis direction, the mating groove is used to cooperate with the guide member, and a metal arc ring is attached to the groove wall of the mating groove; the guide member is made of metal.

[0034] According to some embodiments of the present application, the accommodating member is provided with a first guide portion; the pushing card is provided with a second guide portion in the middle along the X-axis direction; the first guide portion and the second guide portion are slidably matched along the Y-axis direction.

[0035] According to some embodiments of the present application, 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.

[0036] According to some embodiments of the present application, the accommodating member is provided with an accommodating cavity, and the second magnetic conductive body group is fixed in the accommodating cavity and covered by the cavity wall of the accommodating cavity.

[0037] According to some embodiments of the present application, the accommodating component is provided with a shell, the accommodating cavity is opened at the bottom surface of the shell along the Z-axis direction, and the upper surface of the shell is provided with a dispensing hole at a position corresponding to the accommodating cavity along the Z-axis direction.

[0038] According to some embodiments of the present application, an elastic bracket group is further included, the number of the elastic bracket groups is the same as the number of the dynamic contact groups and corresponds one to one, the elastic bracket group is arranged on the push card, when the dynamic contact group contacts the static contact group, the elastic bracket group stores energy, and when the dynamic contact group moves away from the static contact group, the elastic bracket group releases energy.

[0039] According to some embodiments of the present application, an elastic member is further included, which is installed on the accommodating member and is suitable for elastically contacting the push card. The elastic member stores energy when the movable contact group moves away from the static contact group, and releases energy when the movable contact group moves toward the static contact group.

[0040] According to some embodiments of the present application, a micro switch is further included, wherein the micro switch is provided with a dynamic spring and a fixed contact piece, and the push card is provided with a pushing portion, which is suitable for pushing or releasing the dynamic spring so that the dynamic spring contacts or moves away from the fixed contact piece.

[0041] According to some embodiments of the present application, it includes the relay as described above.

[0042] Compared with the prior art, the above solution has the following beneficial effects:

[0043] In the embodiments of the present application, in addition to the short-circuit protection unit of the prior art, a second magnetic conductive group is also positioned between the moving contact group and the reverse current flow portion. The reverse current flow portion's current flow direction is opposite to that of the moving contact group along the X-axis. Therefore, the magnetic flux lines generated by the reverse current flow portion on the side of the second magnetic conductive group are aligned with the magnetic flux lines generated by the current bridge on the side of the second magnetic conductive group. This strengthens the magnetic field strength of the second magnetic conductive group, increasing the magnetic attraction between the second and first magnetic conductive groups. Compared to the prior art, the moving and static contact groups are less likely to separate under high fault currents. It should be noted that two moving and static contact groups with opposite current flow directions generally tend to form magnetic repulsion, and this is generally a design that should be avoided. However, in the first technical solution, the second magnetic conductive group is positioned between the moving and static contact groups. This significantly reduces the magnetic repulsion caused by the opposite current flow directions, thereby increasing the magnetic attraction. This is a key innovation of the first technical solution.

[0044] In an embodiment of the present application, a second flow section extends from the side of the first flow section that is away from the second static contact along the X-axis, and the second flow section is perpendicular to the X-axis. This allows the second flow section to provide clearance for mounting a transformer on the second static contact. A third flow section extends from the end of the second flow section that is away from the first flow section along the Y-axis, and away from the second static contact. The fourth flow section extends from the bottom end of the third flow section along the Z-axis, facilitating connection to a power source or load and providing space for mounting a transformer on the seventh flow section. The reverse flow section extends along the X-axis, and the seventh flow section extends from the reverse flow section along the Y-axis. This allows the seventh flow section to be close to the adjacent first static contact, creating sufficient spacing for mounting a transformer while also controlling the overall relay size along the X-axis. The seventh flow section is perpendicular to the Z-axis, facilitating mounting a transformer and allowing the transformer's terminals to extend along the Z-axis. The mutual inductor is suitable for being installed in the seventh current-carrying portion, so that the first static contact does not protrude too much from the accommodating component along the X-axis direction, thereby facilitating control of the size of the entire relay along the X-axis direction.

[0045] In the embodiment of the present application, the main body is located on the back side of the overcurrent bridge away from the static contact assembly, which is conducive to better forming a magnetic circuit.

[0046] In the embodiment of the present application, the extension portion is close to the second magnetic conductive member group when the movable contact member group contacts the static contact member group, so that the air gap between the magnetic circuits is smaller and the magnetic attraction force is greater.

[0047] In the embodiments of the present application, the second magnetic conductive group is located between the static contact points of the two static contacts. When a high current flows through the contact area, the two static contacts may short-circuit through the second magnetic conductive group. Therefore, the second magnetic conductive group is encased in an insulator to increase the creepage distance between the two static contacts located on either side of the same second magnetic conductive group, thereby preventing the two static contacts from short-circuiting due to the second magnetic conductive group.

[0048] In an embodiment of the present application, since a protrusion or groove is provided on the outer surface of the insulator covering the second magnetic conductive group, the extension direction of the protrusion or groove intersects with the layout direction of the two static contacts, thereby increasing the creepage distance between the two static contacts, and the two static contacts are less likely to conduct through the surface of the insulator, and therefore less likely to short-circuit.

[0049] In the embodiment of the present application, the insulator is formed in the receiving part, which occupies less space and has a higher degree of integration of the relay compared to providing a separate insulator.

[0050] In the embodiment of the present application, the second magnetic conductive member group is fixedly connected to and accommodated in the accommodation cavity, so that the second magnetic conductive member group is easier to install.

[0051] In the embodiment of the present application, a glue hole is provided on the upper surface of the housing at a position corresponding to the accommodating cavity. The glue is sucked into the accommodating cavity by the siphon phenomenon, making it easier to fix the second magnetic conductive assembly in the accommodating cavity. Therefore, the installation of the second magnetic conductive assembly is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] FIG1 is an exploded perspective view of a relay in an embodiment;

[0053] FIG2 is an exploded perspective view of the housing in the embodiment;

[0054] FIG3 is a perspective view of the bottom shell in the embodiment;

[0055] FIG4 is a top view of the magnetic circuit portion in the embodiment;

[0056] FIG5 is an exploded perspective view of the coil assembly in the embodiment;

[0057] FIG6 is a perspective view of the armature assembly in the embodiment;

[0058] FIG7 is a front view of the armature assembly in the embodiment;

[0059] FIG8 is a top view of the armature assembly in the embodiment;

[0060] FIG9 is a schematic diagram of a magnetic circuit portion when the armature assembly is in a magnetic holding state at the first position according to an embodiment;

[0061] FIG10 is a schematic diagram of the magnetic circuit portion of the embodiment when the coil assembly just receives the first pulse electrical signal;

[0062] FIG11 is 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] FIG12 is a schematic diagram of a magnetic circuit portion when the armature assembly is in a magnetic holding state at the second position according to an embodiment;

[0064] FIG13 is a schematic diagram of the magnetic circuit portion of the embodiment when the coil assembly just receives the second pulse electrical signal;

[0065] FIG14 is a schematic diagram of a magnetic circuit portion when the armature assembly is driven by the coil assembly to move to the first position according to an embodiment;

[0066] FIG15 is an exploded perspective view of the moving parts in the embodiment;

[0067] FIG16 is a top view of the pushing unit in the embodiment;

[0068] FIG17 is a left side view of the pushing unit in the embodiment;

[0069] FIG18 is a perspective view of a pushing unit in an embodiment;

[0070] FIG19 is a perspective view of a moving contact unit in an embodiment;

[0071] FIG20 is a perspective view of a position limiting member in an embodiment;

[0072] FIG21 is a top view of the moving part in the embodiment;

[0073] FIG22 is a perspective view of a stationary contact assembly in an embodiment;

[0074] FIG23 is a schematic structural diagram of the contact portion in an embodiment;

[0075] FIG24 is a schematic diagram of the contact portion of the relay in the conductive state according to the embodiment;

[0076] FIG25 is a schematic diagram of the embodiment when the relay is in the on state;

[0077] FIG26 is a cross-sectional view taken along line AA of FIG25;

[0078] FIG27 is a partial enlarged view of portion B of FIG26;

[0079] FIG28 is a schematic diagram of an embodiment in which the relay is in an off state;

[0080] FIG29 is a partial enlarged view of portion C of FIG28;

[0081] FIG30 is a perspective view of an elastic member and a guide member in an embodiment;

[0082] FIG31 is a cross-sectional view taken along line DD in FIG25 ;

[0083] FIG32 is a front view of the micro switch in the embodiment;

[0084] FIG33 is a perspective view of the relay and the mutual inductor in the embodiment.

[0085] Description of the main reference numerals: 1. Relay; 2. Accommodating member; 3. Magnetic circuit portion; 4. Pushing portion; 5. Contact portion; 6. Guide member; 7. Elastic member; 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 member; 18. Housing; 19. Cover; 20. Bottom shell; 21. Blocking member; 22. Accommodating chamber; 23. Protrusion; 24. Coil accommodating chamber; 25. Partition; 26. First guide portion; 27. Fitting portion group; 28. Fitting portion; 29. ​​Contact chamber; 30. Blocking portion; 31. Coil frame; 32. Coil winding; 33. Iron core; 34. Yoke; 35. Shielding member; 36. Signal input terminal; 37. First yoke; 38. First 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, part 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, dynamic contact unit; 64, accommodating part; 65, connecting part; 66, push part; 67, second guide 68. Mounting hole; 69. Limiting part group; 70. Limiting part; 71. Clamping part; 72. Moving contact; 73. Overcurrent bridge; 74. Moving contact; 75. First moving contact; 76. Second moving contact; 77. First magnetic conductor; 78. Body; 79. Extension part; 80. Elastic bracket; 81. Bracket body; 82. Elastic supporting part; 83. Adapting part; 84. Elastic arm; 85. Abutting part; 86. Attaching part; 87. Avoidance hole; 88. Clamping hole; 89. Static contact; 90. Static contact; 91. Load terminal; 92. First static contact; 93. Second static contact; 94. First static contact; 95. First overcurrent part; 96. Second overcurrent part; 97. Third overcurrent part; 98. 8. 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. Pushing surface; 111. Avoidance groove; 112. Fixed contact member; 113. Moving spring; 114. Signal output terminal; 115. Fixed connection portion; 116. Second bending portion; 117. Bridging portion; 118. Transformer; A1. First closed magnetic circuit; A2. Second closed magnetic circuit; B1: First driving magnetic circuit; B2: Second driving 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. Specific embodiments

[0086] In the claims and the specification, except in the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" simply refer to the fact that features having one of these directions are perpendicular to features having another direction, and do not require that they be implemented in accordance with 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 both the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into left and right, the Y-axis direction can be divided into front and back, and the Z-axis direction can be divided into up and down.

[0087] 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.

[0088] In the claims and the specification, unless otherwise specified, the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are based on the directions and positional relationships shown in the accompanying drawings and are only for the convenience of simplifying the description, and do not imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction.

[0089] In the claims and description, unless otherwise specified, 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 or relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection, and fixed connection through other devices or elements.

[0090] In the claims and the description, unless otherwise defined, the terms "include", "have" and their variations mean "including but not limited to".

[0091] In the claims and the description, unless otherwise defined, the term "provided with" means that the technical feature thereafter is part of the technical feature therefor.

[0092] 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.

[0093] In the claims and specification, unless otherwise specified, the term "reversal" means that when the current direction of the pulsed electrical signal received by the coil assembly is different from the current direction of the pulsed electrical signal received last time, the polarity of the temporarily formed magnetic drive end is opposite to the polarity of the previously temporarily formed magnetic drive end. Of course, those skilled in the art will understand that for a magnetic latching relay, if the current direction of the pulsed electrical signal received by the coil assembly is the same as the current direction of the pulsed electrical signal received last time, the received pulsed electrical signal has no control significance and the relay state will not change.

[0094] In the claims and description, unless otherwise defined, the term "magnetic conductive cross section" refers to the cross section of the armature perpendicular to its magnetic conductive path in a magnetic field.

[0095] In the claims and the specification, unless otherwise defined, the term "back surface" refers to the surface facing away from the static contact assembly.

[0096] In the claims and the specification, unless otherwise defined, the term "mounted" means connected directly or indirectly to each other.

[0097] In the claims and the specification, unless otherwise defined, the term "support" means that the weight of an object will act on another object.

[0098] 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 parts and they are directly connected.

[0099] The technical solutions in the embodiments will be described clearly and completely below with reference to the accompanying drawings.

[0100] Example

[0101] 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-state 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 it receives the second pulse electrical signal; 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 it receives the first pulse electrical signal. 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.

[0102] 1 , which shows the structure of a relay 1 in this embodiment, includes a receiving member 2 , a magnetic circuit portion 3 , a pushing portion 4 , a contact portion 5 , a guide member 6 , an elastic member 7 , and a micro switch 8 .

[0103] Among them, the magnetic circuit part 3 includes a coil assembly 9 and an armature assembly 10. The contact part 5 includes a contact group 11 and an anti-short circuit unit 12. The number of the contact group 11 is at least one, and the number of the anti-short circuit units 12 is the same as that of the contact groups 11 and they correspond one to one. Each contact group 11 includes a moving contact group 13 and a static contact group 14. Each anti-short circuit unit 12 includes a first magnetic conductor group 15 and a second magnetic conductor group 16. Since this embodiment needs to control the simultaneous on and off of three phases, the number of contact groups 11 in this embodiment is three. In this embodiment, the armature assembly 10, the pushing part 4, the moving contact 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.

[0104] For the convenience of introduction, the order of introduction of this embodiment is as follows: the accommodating part 2, the magnetic circuit part 3, the moving part 17, the static contact group 14, the second magnetic conductor group 16, the contact part 5, the guide part 6, the elastic part 7 and the micro switch 8, and finally the working principle of the relay 1 is summarized.

[0105] The accommodating member 2 houses the magnetic circuit component 3, the pusher 4, the contact portion 5, the guide 6, the elastic member 7, and the microswitch 8. The accommodating member 2 should also be considered the reference for the movement of the moving component 17. In this embodiment, all references to movement are relative to the accommodating member 2. As in the prior art, the accommodating member 2 is made of insulating material. In this embodiment, it is formed by plastic injection molding.

[0106] As shown in Figure 1, the accommodating member 2 includes a housing 18 and a cover 19. In this embodiment, the housing 18 is used to accommodate and mount the magnetic circuit component 3, the pusher 4, the contact portion 5, the guide 6, the elastic member 7, and the micro switch 8. In this embodiment, "mounted" means directly or indirectly connected to each other.

[0107] Referring to Figures 2 and 3 , Figures 2 and 3 illustrate the housing 18 in this embodiment. As shown in Figure 2 , the housing 18 includes a bottom shell 20 and a blocking member 21. Three accommodating cavities 22 are provided at the front portion of the bottom shell 20 along the Y-axis. The three accommodating cavities 22 are arranged along the X-axis. The accommodating cavities 22 are used to accommodate the second magnetic conductor group 16. The accommodating cavities 22 are provided with openings along the Z-axis. The openings are located on the bottom surface of the bottom shell 20 facing away from the cover 19. In this embodiment, two signal input terminals 36 and two signal output terminals 114 extend from the bottom surface of the bottom shell 20 along the Z-axis, 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 status signals to the relay status sensing circuit.

[0108] As shown in FIG2 , in this embodiment, the number of the blocking members 21 and the number of the accommodating cavities 22 are the same and correspond one to one. The blocking members 21 are fixed to the bottom shell 20 and are used to cover the openings of the corresponding accommodating cavities 22 so that the second magnetic conductive member group 16 is fixed in the accommodating cavities 22 .

[0109] As shown in Figure 3, in this embodiment, the other ends of the three accommodating cavities 22 opposite the openings along the Z-axis are sealed and provided with three sets of protrusions 23. These three sets of protrusions 23 are located at the front portion of the upper end of the bottom housing 20 along the Y-axis. Each set of protrusions 23 includes two protrusions 23 arranged along the X-axis. Each protrusion 23 extends in a direction that intersects the X-axis, but in this embodiment, extends in the Y-axis. The function of the protrusions 23 will be discussed together with the description of the contact portion 5.

[0110] As shown in FIG3 , in this embodiment, a coil accommodating chamber 24 is provided at the rear portion of the bottom shell 20 along the Y-axis. The coil accommodating chamber 24 is located in the middle portion of the bottom shell 20 along the X-axis. The coil accommodating chamber 24 opens upward along the Z-axis and is used to accommodate the coil assembly 9. A plurality of compartments 25 are provided on either side of the coil accommodating chamber 24 along the X-axis. Some of the compartments 25 have heat dissipation holes on the bottom surface of the bottom shell 20. These holes are used to conduct heat generated by electrical conduction within the accommodating element 2 to the external environment. In this embodiment, the area where the compartments 25 are located is not used to accommodate other components. Therefore, the size of the coil accommodating chamber 24 along the X-axis can be increased as needed.

[0111] As shown in Figure 3, in this embodiment, a first guide portion 26 is provided on the upper surface of the middle part of the bottom wall 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.

[0112] As shown in Figure 3, in this embodiment, the bottom shell 20 is provided with a mating portion group 27 on the left and right sides along the X-axis. Each mating portion group 27 includes at least two mating portions 28. In this embodiment, each mating portion group 27 includes two mating portions 28. The mating portions 28 in the same mating portion group 27 are arranged along the Y-axis. In this embodiment, each mating portion 28 is provided with a mating groove extending along the Y-axis, and the mating groove is used to mate with the guide member 6. The groove wall of the mating groove can be attached with a metal arc ring to reduce debris generated by friction between the guide member 6 and the mating portion 28. Alternatively, the contact surface between the mating groove and the guide member 6 can be reduced by chamfering or rounding.

[0113] As shown in Figure 3, in this embodiment, the bottom shell 20 is provided with contact cavities 29. The number of contact cavities 29 is the same as the number of contact member groups 11 and corresponds one-to-one. In this embodiment, there are three contact cavities 29. The three contact cavities 29 are all located between the first guide portion 26 and each protrusion 23 along the Y-axis direction. The three contact cavities 29 are arranged along the X-axis direction. The contact cavities 29 are used to accommodate the contact member group 11 and allow the movable contact member group 13 to contact or move away from the static contact member group 14 along the Y-axis direction. A barrier portion 30 is provided between any two adjacent contact cavities 29. In this embodiment, there are two barrier portions 30. The barrier portions 30 generally extend along the Y-axis direction and have a certain dimension in the Z-axis direction to separate adjacent contact cavities 29. When the movable contact member group 13 contacts the static contact member group 14, the barrier portions 30 separate or even block adjacent contact cavities 29. The barrier 30 is used to prevent short circuits between adjacent static contact groups 14, which could result in short circuits between two phases of the three-phase AC power. It also prevents arcing in some contact groups 11 from propagating to other contact groups 11, causing short circuits between two phases. In this embodiment, the barrier 30 is formed on the bottom shell 20 of the accommodating member 2 and is therefore also made of an insulating material. In other embodiments, the barrier 30 could be formed on the push card 58 or be a separate arc-isolating component fixed to the accommodating member 2 or the push card 58.

[0114] As shown in Figure 1 , in this embodiment, the bottom housing 20 has an opening facing upward along the Z-axis. The cover 19 serves to shield the opening of the bottom housing 20 and is fixedly connected to the bottom housing 20. In this embodiment, the cover 19 is snap-fitted to the bottom housing 20 and is also provided with several plug-in posts that engage with the bottom housing 20 to position the cover 19.

[0115] Magnetic circuit portion 3 is configured to receive a pulsed electrical signal and, based on the pulsed electrical signal, drives push portion 4 to linearly move along the Y-axis, thereby changing the state of contact portion 5. In this embodiment, magnetic circuit portion 3 is also configured to maintain push portion 4 and contact portion 5 in their current state after the pulsed electrical signal disappears, until a new pulsed electrical signal is received.

[0116] 4 , which shows the magnetic circuit portion 3 in this embodiment. As shown in FIG4 , the magnetic circuit portion 3 in this embodiment includes a coil assembly 9 and an armature assembly 10.

[0117] Referring to FIG5 , FIG5 shows a coil assembly 9 in this embodiment. As shown in FIG5 , the coil assembly 9 is located on the side of the contact portion 5 away from the front surface of the accommodating member 2 along the Y-axis direction. The coil assembly 9 includes a coil bobbin 31, a coil winding 32, an iron core 33, a yoke 34, and a shield 35.

[0118] As shown in Figure 5, the coil frame 31 is fixed to the bottom shell 20 and is located in the coil accommodating cavity 24. The coil frame 31 extends along the X-axis and has a center hole extending along the X-axis. The coil frame 31 has retaining walls at both ends along the X-axis.

[0119] As shown in Figure 5 , the coil winding 32 is wound around the coil bobbin 31 and positioned between the two retaining walls. Therefore, the axis of the coil winding 32 also extends along the X-axis. The two terminals of the coil winding 32 are connected to two signal input terminals 36 , which are fixed to the retaining walls of the coil bobbin 31 and extend through the bottom housing 20 along the Z-axis, extending from the bottom surface of the bottom housing 20 (see Figure 2 ).

[0120] As shown in FIG5 , the iron core 33 is placed in the center hole of the coil frame 31 and extends along the X-axis direction.

[0121] As shown in Figure 5, in this embodiment, there are two yokes 34 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 fixed to the two ends of the iron core 33, and the ends of the two yokes 34 away from the iron 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 this embodiment, the two yokes 34 are both L-shaped, with the ends of their longer arms fixed to the ends of the iron 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 both 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.

[0122] As shown in Figure 5, shielding member 35 is fixed relative to coil frame 31 and is made of metal. In this embodiment, shielding member 35 covers coil assembly 9 above along the Z-axis and on both sides along the X-axis. Shielding member 35 is used to protect coil assembly 9 and armature assembly 10 from interference from external magnetic fields, and also to prevent the magnetic field formed between coil assembly 9 and armature assembly 10 from external interference.

[0123] In this embodiment, the coil assembly 9 is stimulated by a pulsed electrical signal to reverse the polarity of the two magnetic drive ends 39 temporarily formed. "Temporarily formed" in this embodiment means that the polarity of the magnetic drive ends 39 formed by the pulsed electrical signal disappears as the pulsed electrical signal disappears. "Reversed" in this embodiment means that when the current direction of the pulsed electrical signal received by the coil assembly 9 is different from the current direction of the pulsed electrical signal received last time, the polarity of the magnetic drive ends 39 temporarily formed this time is opposite to the polarity of the magnetic drive ends 39 temporarily formed last time. In this embodiment, as previously described, the pulsed electrical signal can be divided into a first pulsed electrical signal and a second pulsed electrical signal. The first pulsed electrical signal is used to control the conduction of an external circuit, and the second pulsed electrical signal is used to control the disconnection of an external circuit. In this embodiment, the first pulsed electrical signal and the second pulsed electrical signal are electrical pulses with opposite current directions. In this embodiment, for ease of description, it is assumed that the coil winding 32 is excited by the first pulsed electrical signal to form a first magnetic field, with the first magnetic drive end 40 temporarily having a north polarity and the second magnetic drive end 41 temporarily having a south polarity. After the first pulsed electrical signal disappears, the first magnetic drive end 40 and the second magnetic drive end 41 no longer have the polarity generated by the first magnetic field. Instead, the coil winding 32 is excited by the second pulsed electrical signal to form a second magnetic field, which temporarily causes the first magnetic drive end 40 to have an S-pole polarity and the second magnetic drive end to have an N-pole polarity. After the second pulsed electrical signal disappears, the first magnetic drive end 40 and the second magnetic drive end 41 no longer have the polarity generated by the second magnetic field.

[0124] In this embodiment, the coil assembly 9 includes only one coil winding 32, which has only two signal input terminals 36. In other embodiments, the coil assembly 9 may include two coil windings 32, each of which may be provided with three or four signal input terminals 36. Each signal input terminal 36 outputs a corresponding first pulse electrical signal and second pulse electrical signal to the two coil windings 32. At this point, the coil assembly 9 as a whole is still stimulated by the pulse electrical signal, reversing the temporarily formed polarity of the two magnetic drive ends 39.

[0125] The armature assembly 10 is driven by the coil assembly 9 to move along the Y-axis. This movement can be divided into movement from a rearward first position to a forward second position, and from a forward second position to a rearward first position. When the armature assembly 10 moves to the first position, the relay 1 is in the off state, disconnecting the external three-phase AC power source and the load. When the armature assembly 10 moves to the second position, the relay 1 is in the on state, connecting the external three-phase AC power source and the load.

[0126] 6 to 8 , which illustrate the armature assembly 10 in this embodiment. As shown in FIG6 , in this embodiment, the armature assembly 10 includes two permanent magnets 42 and two armatures 43 .

[0127] As shown in Figure 6, in this embodiment, the two permanent magnets 42 are formed of magnetized magnetic steel. In other embodiments, the two permanent magnets 42 can 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 each have two magnetic poles with fixed polarity, namely 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 ease of description, the first magnetic pole is set to the north pole and the second magnetic pole is set to the south pole. In this embodiment, the two permanent magnets 42 are arranged along the X-axis. The two magnetic poles of each permanent magnet 42 are arranged along the Y-axis. 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.

[0128] As shown in Figure 6, 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 a first projection plane U perpendicular to the Z-axis intersect with each other. Each armature 43 is provided with two engaging portions 50 at its ends along the X-axis. The first armature 48 is provided with a first engaging portion 51 and a second engaging portion 52 at its ends along the X-axis. The first engaging portion 51 is on the left side along the X-axis and at the front along the Y-axis, while the second engaging portion 52 is on the right side along the X-axis and at the rear along the Y-axis. The second armature 49 is provided with a third engaging portion 53 and a fourth engaging portion 54 at its ends along the X-axis. The third engaging portion 53 is on the right side along the X-axis and at the front along the Y-axis, while the fourth engaging portion 54 is on the left side along the X-axis and at the rear along the Y-axis. Therefore, the first suction portion 51 and the third suction portion 53 are arranged along the X-axis direction, and the fourth suction portion 54 and the second suction portion 52 are arranged along the X-axis direction; the first suction portion 51 and the fourth suction portion 54 are arranged along the Y-axis direction, and the third suction portion 53 and the second suction portion 52 are arranged along the Y-axis direction.

[0129] As shown in Figures 6 and 7, 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 is smaller than the width of the wider section 57 along the Z-axis. In this embodiment, there are two wider sections 57, and the two wider sections 57 are located on either side of the narrower section 56 along the X-axis. The intersecting portion 55 of each armature 43 is located in the narrower section, so that a gap V is formed between the intersecting portions 55 of the two armatures 43. In each armature 43, the locations where the two permanent magnets 42 are fixed are located on either side of the intersecting portion 55 along the X-axis and are both located in the wider section 57.

[0130] As shown in Figure 8, in this embodiment, the armature assembly 10 extends along the X-axis, 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-symmetrical with respect to a symmetry plane W perpendicular to the X-axis direction.

[0131] 9 to 15 , which illustrate the operating principle of the magnetic circuit portion 3 in this embodiment.

[0132] As shown in Figure 9, in this embodiment, the armature assembly 10 is positioned along the X-axis between the two long arms connecting the yoke 34 and the core 33. The first magnetic drive end 40 is positioned along the Y-axis between the first and fourth engaging portions 51, 54; the second magnetic drive end 41 is positioned along the Y-axis between the third and second engaging portions 53, 52.

[0133] Figure 9 illustrates the state of the magnetic circuit portion 3 when the armature assembly 10 of this embodiment is in the first position and in the magnetically latched state. As shown in Figure 9 , when the armature assembly 10 is in the first position and in the magnetically latched state, the first engaging portion 51 engages the first magnetic drive end 40, and the third engaging portion 53 engages the second magnetic drive end 41. At this point, the magnetic circuit portion 3 forms two closed magnetic loops, namely, a first closed magnetic loop A1 and a second closed magnetic loop A2. The first closed magnetic loop A1 runs from the first magnetic pole 46 of the first permanent magnet 44, through the first engaging portion 51, the first magnetic drive end 40, the first yoke 37, the core 33, the second yoke 38, the second magnetic drive end 41, the third engaging portion 53, the intersecting portion 55 of the second armature 49, the second magnetic pole 47 of the first permanent magnet 44, and back to the first magnetic pole 46 of the first permanent magnet 44, without any air gaps in between and passing 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 attracting 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 attracting portion 53, the second magnetic pole 47 of the second permanent magnet 45, and back 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 in 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 attracting portion 51 and the first magnetic drive end 40, and between the third attracting portion 53 and the second magnetic drive end 41, and the armature assembly 10 is maintained in the first position relative to the coil assembly 9.

[0134] Figure 10 shows the state of the magnetic circuit portion 3 when the coil assembly 9 in this embodiment has just received the first pulse electrical signal. At this time, the coil winding 32 is excited by the first pulse electrical signal to generate a first magnetic field, so that the first magnetic drive end 40 temporarily has an N-pole polarity, and the second magnetic drive end 41 temporarily has an S-pole polarity. Since the first magnetic drive end 40 and the first attraction part 51 have the same polarity and are both N-pole, the first magnetic drive end 40 generates a magnetic repulsion force on the first attraction part 51; since the second magnetic drive end 41 and the third attraction part 53 have the same polarity and are both S-pole, the second magnetic drive end 41 generates a magnetic repulsion force on the third attraction part 53. Not only that, the magnetic circuit portion 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 attraction 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 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. 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 repulsive force on the first attraction part 51, and the second magnetic drive end 41 exerts a magnetic repulsive force on the third attraction 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 attraction part 54, and the second magnetic drive end 41 generates a magnetic attraction force on the second attraction 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 from the first position along the Y-axis direction to the second position.

[0135] Figure 11 shows 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. 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 attracting portion 54 along the Y-axis from the first position to the second position, causing the fourth attracting portion 54 to attract the first magnetic drive end 40; the second magnetic drive end 41 limits the movement of the second attracting portion 52 along the Y-axis from the first position to the second position, causing the second attracting portion 52 to attract the second magnetic drive end 41. As shown in Figure 11, when the armature assembly 10 has just moved to the second position, the first pulse electrical signal and the first magnetic field have not yet 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 portion 3 forms two closed magnetic loops, namely the third closed magnetic loop A3 and the fourth closed magnetic loop A4. The third closed magnetic circuit A3 runs from the first magnetic drive end 40, through the fourth attraction portion 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 portion 55 of the first armature 48, the second attraction portion 52, 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, without any air gap in between, and passes through the entire coil assembly 9. The fourth closed magnetic circuit A4 runs from the first magnetic drive end 40, through the fourth attraction portion 54, the intersecting portion 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 attraction portion 52, 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, 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 force is generated between the first magnetic drive end 40 and the fourth attraction part 54 and between the second magnetic drive end 41 and the second attraction part 52.

[0136] Figure 12 shows the state of the magnetic circuit portion 3 when the armature assembly 10 in this embodiment is in the second position and magnetically retained. As shown in Figure 12, when the first pulsed electrical 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 point, the third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 still exist. The third closed magnetic circuit A3 can be considered to originate from the first magnetic pole 46 of the first permanent magnet 44, following the same path as the third closed magnetic circuit A3 shown in Figure 11; the fourth closed magnetic circuit A4 can be considered to originate from the first magnetic pole 46 of the second permanent magnet 45, following the same path as the fourth closed magnetic circuit A4 shown in Figure 11. The third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 overlap, generating a stronger magnetic attraction between the fourth attracting portion 54 and the first magnetic drive end 40, and between the second attracting portion 52 and the second magnetic drive end 41. The armature assembly 10 remains in the second position relative to the coil assembly 9.

[0137] Figure 13 shows the state of the magnetic circuit portion 3 when the coil assembly 9 in this embodiment has just received the second pulse electrical signal. As shown in Figure 13, 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 attraction part 54 have the same polarity and are both S-poles, the first magnetic drive end 40 generates a magnetic repulsion force on the fourth attraction part 54; since the second magnetic drive end 41 and the second attraction part 52 have the same polarity and are both N-poles, the second magnetic drive end 41 generates a magnetic repulsion force on the second attraction part 52. Not only that, the magnetic circuit portion 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 attraction part 53, the intersecting part 55 of the second armature 49, the second magnetic pole 47 of the first permanent magnet 44, the first magnetic pole 46 of the first permanent magnet 44, 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. 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. There are only two second air gaps Q in the middle that must exist as travel gaps, and they pass 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 repulsive force on the fourth attraction part 54, and the second magnetic drive end 41 exerts a magnetic repulsive force on the second attraction 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 attraction part 51, and the second magnetic drive end 41 generates a magnetic attraction force on the third attraction 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 from the second position along the Y-axis direction to the first position.

[0138] Figure 14 shows 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. 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 attraction portion 51 along the Y-axis from the second position to the first position, so that the first attraction portion 51 attracts the first magnetic drive end 40; the second magnetic drive end 41 limits the movement of the third attraction portion 53 along the Y-axis from the second position to the first position, so that the third attraction portion 53 attracts the second magnetic drive end 41. As shown in Figure 14, when the armature assembly 10 just moves to the first position, the second pulse electrical signal and the second magnetic field have not yet disappeared, the first magnetic drive end 40 still temporarily has the S pole polarity, and the second magnetic drive end 41 still temporarily has the N pole polarity. At this time, the magnetic circuit portion 3 still contains the first closed magnetic circuit A1 and the second closed magnetic circuit A2, wherein the first closed magnetic circuit A1 can be considered to start from the second magnetic drive end 41, and its path is the same as the path of the first closed magnetic circuit A1 shown in Figure 9; the second closed magnetic circuit A2 can be considered to start from the second magnetic drive end 41, and its path is the same as the path of the second closed magnetic circuit A2 shown in Figure 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 attraction portion 51, and between the second magnetic drive end 41 and the third attraction portion 53.

[0139] When the second pulse 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. At this time, the armature assembly 10 is in the magnetic holding state at the first position as shown in FIG9 .

[0140] The above process fully describes the working principle of the magnetic circuit portion 3 in this embodiment. As can be seen from the above description, regardless of whether the magnetic circuit portion 3 is in the magnetic holding state or the magnetic drive state, a first part of the magnetic circuit without an air gap can be formed between the two attracting parts 50 of the armature assembly 10, and a second part of the magnetic circuit that passes through the entire coil assembly 9 can be formed between the two magnetic drive ends 39 of the coil assembly 9. Whether in the magnetic holding state or the magnetic drive state, the first part and the second part can form a complete magnetic circuit, thereby enabling the coil assembly 9 in this embodiment to drive the armature assembly 10 to move linearly along the Y-axis direction according to the pulse electrical signal. After the pulse electrical signal disappears, the armature assembly 10 remains in the current state until a new pulse electrical signal is received.

[0141] The moving component 17 in this embodiment is the primary portion of the relay 1 that moves relative to the accommodating member 2. Referring to FIG15 , FIG15 illustrates the moving component 17 in this embodiment. As shown in FIG15 , in this embodiment, the moving component 17 includes the armature assembly 10, the push portion 4, the movable contact assembly 13, and the first conductive magnet assembly 15. The push portion 4 includes a push latch 58, a connector 59, an elastic bracket assembly 60, and a stopper 61. The armature assembly 10, the push latch 58, and the connector 59 form a push unit 62, while the movable contact assembly 13, the first conductive magnet assembly 15, and the elastic bracket assembly 60 form a movable contact unit 63. The push unit 62 is used to propel the movable contact unit 63 in a linear motion along the Y-axis, and the movable contact unit 63 is used to contact or move away from the stationary contact assembly 14. For ease of description, the moving component 17 in this embodiment will be described in detail below, following the order of the push unit 62, the movable contact unit 63, and the stopper 61.

[0142] Referring to Figures 16 to 18 , the push unit 62 of this embodiment is shown. As described above, the push unit 62 includes the armature assembly 10, the push card 58, and the connector 59. The armature assembly 10 has been described in detail above. The push card 58 and connector 59 are described in detail below.

[0143] The push card 58 is driven by the armature assembly 10 and is used to install and carry the moving contact unit 62. "Carrying" in this embodiment means that the gravity of an object will act on another object. As shown in Figure 16, the push card 58 is fixedly connected to the armature assembly 10. In this embodiment, the push card 58 is insert-molded integrally with the armature assembly 10 and the connecting member 59. The push card 58 can be divided into a receiving portion 64 for accommodating the armature assembly 10 and a connecting portion 65 for accommodating 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 for the convenience of introduction only, and the two are actually connected as one.

[0144] As shown in Figure 16, when the armature assembly 10 is accommodated in the accommodating portion 64, the armature assembly 10, except for the four engaging portions 50, is enclosed in the accommodating portion 64. Because 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 engaging 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 engaging portion 51 and the fourth engaging portion 54 extend from the left side of the accommodating portion 64 along the X-axis direction, with the first engaging portion 51 located at the front along the Y-axis direction and the fourth engaging portion 54 located at the rear along the Y-axis direction. The third engaging portion 53 and the second engaging portion 52 extend from the right side of the accommodating portion 64 along the X-axis direction, with the third engaging portion 53 located at the front along the Y-axis direction and the second engaging portion 52 located at the rear along the Y-axis direction.

[0145] As shown in Figure 16, 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. The "back side" here refers to the side facing 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 contacts 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.

[0146] As shown in Figure 17, the bottom surface of the push card 58 is provided with a second guide portion 67 in the middle portion along the X-axis and the Y-axis. Specifically, the second guide portion 67 is disposed on the accommodating portion 64. The second guide portion 67 slidably engages with the first guide portion 26 along the Y-axis. Since, in this embodiment, the first guide portion 26 is a guide groove extending along the Y-axis, the second guide portion 67 is a guide protrusion extending along the Z-axis. The guide protrusion is inserted into the guide groove and slides relative to the guide groove along the Y-axis, allowing the first guide portion 26 to guide the linear motion of the push card 58 along the Y-axis. In other embodiments, the first guide portion 26 can be configured as a guide protrusion and the second guide portion 67 as a guide groove. Alternatively, any sliding engagement structure known to those skilled in the art can be employed to enable the first guide portion 26 to guide the push card 58.

[0147] As shown in FIG18 , mounting holes 68 are provided on both sides of the connecting portion 65 along the X-axis, and the mounting holes 68 are used to cooperate with the guide member 6. In this embodiment, the mounting holes 68 are provided at the position closest to the edge of the connecting portion 65 along the X-axis to make the guiding function of the guide member 6 more obvious.

[0148] As shown in Figure 18, in this embodiment, three limiter groups 69 are provided on the connection surface of the connecting portion 65 facing the static contact group 14, between the two mounting holes 68. The number of limiter groups 69 is the same as that of the moving contact group 13, and they correspond one-to-one. The three limiter groups 69 are generally arranged symmetrically along the X-axis and face the corresponding contact cavity 29. Each limiter group 69 is provided with two limiters 70. The two limiters 70 are arranged along the Z-axis. In this embodiment, the limiters 70 are connecting posts protruding from the connection surface.

[0149] As shown in FIG18 , in this embodiment, among the longitudinal cross-sections of the push card 58 perpendicular to the Y-axis, the longitudinal cross-section located in the accommodating portion 64 has the smallest dimension along the X-axis among the longitudinal cross-sections of the push card 58 along the X-axis. This essentially means that no connecting rod is provided between the accommodating portion 64 and the connecting portion 65 along the Y-axis. As shown in FIG18 , along the Y-axis, the connecting portion 65 is directly connected to the front portion of the accommodating portion 64.

[0150] As shown in Figure 18, as mentioned above, the connector 59 and the push card 58 are insert-injected and integrally formed. In this embodiment, the number of connectors 59 is the same as that of the movable contact group 13 and they correspond one to one. The connector 59 is used to connect with the corresponding limit member 61 so that the limit member 61 is fixed relative to the push card 58. In this embodiment, the number of connectors 59 is three and they are arranged along the X-axis direction. The position of each connector 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 connector 59 extends along the Z-axis direction, and its two ends extend out of the push card 58 to form two clamping parts 71. The clamping part 71 is used to connect the limit member 61.

[0151] Referring to Figure 19 , it illustrates the movable contact units 63 of this embodiment. The number of movable contact units 63 is the same as the number of movable contact member groups 13, and they correspond one-to-one. In this embodiment, there are three movable contact units 63, arranged along the X-axis. As described above, each movable contact unit 63 includes a movable contact member group 13, a first magnetic conductive member group 15, and an elastic support group 60.

[0152] The moving contact assembly 13 is driven by the push unit 62 to contact or move away from the stationary contact assembly 14 along the Y-axis. When the armature assembly 10 is in the first position, the moving contact assembly 13 moves away from the stationary contact assembly 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 disconnected. When the armature assembly 10 is in the second position, the moving contact assembly 13 contacts the stationary contact assembly 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 connected.

[0153] As shown in Figure 19, 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 move 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 movable contact assembly 13 contacts the stationary contact assembly 14, current flows from one movable contact 74 to the other movable contact 74 via the current bridge 73. For ease of description, the current is assumed to flow from the first movable contact 75 to the second movable contact 76 via the current bridge 73. Those skilled in the art will readily appreciate that, since the relay 1 in this embodiment is used to control the on / off of alternating current (AC), this assumption is made merely for ease of description.

[0154] As shown in Figure 19, the first magnet group 15 includes at least one first magnet 77. The number of the first magnets 77 may be the same as the number of the moving contacts 72 in the corresponding moving contact group 13 and correspond one-to-one to each other, or they may be different and not correspond one-to-one. In this embodiment, the number of the first magnets 77 is the same as the number of the moving contacts 72 in the corresponding moving contact group 13 and correspond one-to-one. In the first magnet group 15, there are two first magnets 77, and each first magnet 77 is arranged at intervals along the Z-axis direction. In this 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 overcurrent bridge 73. In this embodiment, the main body 78 is attached to the back of the overcurrent bridge 73. Two extensions 79 extend from both ends of the main body 77 along the Z axis in the Y-axis direction toward the stationary contact assembly 14. They span the current bridge 73 and even the movable contact 74 along the Y-axis, ensuring that when the movable contact assembly 13 contacts the stationary contact assembly 14, the extensions 79 are close to the second magnetic conductive assembly 16. In other embodiments, the first magnetic conductive body 77 does not necessarily have the shape shown in this embodiment; it may have only the main body 78 or only one extension 79. This is sufficient as long as the first magnetic conductive body 77 can form a magnetic circuit with the second magnetic conductive assembly 79.

[0155] As shown in Figure 19, the elastic bracket group 60 is installed on the push card 58. The elastic bracket group 60 stores energy when the dynamic contact group 13 contacts the static contact group 14 along the Y-axis direction, and releases energy when the dynamic 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 in number and correspond one-to-one with the dynamic contacts 72 in the corresponding dynamic contact group 13, or different in number and do not correspond one-to-one. 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 that are 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 in number and corresponds one-to-one with the limiting portion 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 adapting 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 adapting portion 83 is a connecting hole. The two connecting columns are respectively inserted into the two connecting holes, so that the elastic bracket 80 has no 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 the number of the dynamic contacts 72 in the corresponding dynamic contact group 13 and corresponds one to one. Of course, the number can also be different and not one to one. In this embodiment, the number of elastic support portions 82 is two and is arranged along the Z-axis direction. Each dynamic contact 72 is mounted 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 are at least partially tilted along the Y-axis direction away from the push card 58. The free ends of the two elastic arms 84 are respectively fixed to the back surface of the overcurrent bridge 73, and the locations of fixation to the overcurrent bridge 73 are located behind the first movable contact 75 and the second movable contact 76 along the Y-axis. The elastic support portion 82 can also adopt other structures as long as it can store energy when the movable contact assembly 13 contacts the static contact assembly 14 and release energy when the movable contact assembly 13 moves away from the static contact assembly 14.

[0156] Refer to Figure 20, which shows the limit members 61 in this embodiment. The number of limit members 61 is the same as that of the moving contact group 13 and they correspond one to one. In this embodiment, the number of limit members 61 is three, and the three limit members 61 are arranged along the X-axis direction. The limit members 61 are fixed relative to the push card 58 and are 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 the abutment portion 85 along the Y-axis direction under the action of the elastic bracket 80. The abutment portion 85 is provided with escape holes 87 adapted to allow the extension portions 79 of the two first magnetic conductors 77 to extend in the Y-axis direction. In this embodiment, there are three escape holes 87, arranged along the Z-axis. Two attachment portions 86 extend from both ends of the abutment portion 85 in the Z-axis direction, away from the static contact assembly 14 in the Y-axis direction. Each attachment portion 86 is provided with a latching hole 88, which is designed to engage with a corresponding latching portion 71 on the corresponding connector 59, thereby securing the stopper 61 relative to the push latch 58.

[0157] Referring to Figure 21 , FIG21 illustrates the moving component 17 of this embodiment. As shown in FIG21 , after the moving component 17 is assembled, there is one armature assembly 10 and one pusher clip 58, and three limiter assembly 70, connector 59, elastic bracket assembly 60, limiter 61, movable contact assembly 13, and first conductive magnet assembly 15. Each first conductive magnet 77 in the first conductive magnet assembly 15 is affixed to a corresponding movable contact 72, which in turn is affixed to a corresponding elastic support 82. The elastic bracket 80 slidably engages with each limiter 70 of the corresponding limiter assembly 69. The limiter 61 engages with the connector 59, and the abutment 85 abuts the current bridge 73 of each movable contact 72 along the Y-axis to limit the distance between each movable contact 72 and the static contact assembly 14. This also limits the position of the bracket body 81 along the Y-axis, securing the bracket body 81 relative to the pusher clip 58.

[0158] Refer to Figure 22, which shows the static contact group 14 in this embodiment. The static contact group 14 is fixed to the bottom shell 20. As shown in Figure 22, in this embodiment, the static contact group 14 is the same in number as the dynamic contact group 13 and corresponds to each other one by one. In this embodiment, the number of static contact groups 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.

[0159] As shown in Figure 22, 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 the number of the first moving contacts 75 in the corresponding moving contact group 13, and they correspond to each other one by one. In this embodiment, there are two first static contacts 94 and they are arranged along the Z-axis direction. The first static contacts 94 are suitable for contacting or moving away from the corresponding first moving contact 75 along the Y-axis direction. Each first static contact 94 is fixed 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. 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 flow portion 97 extends leftward along the X-axis from one end of the second flow portion 96 along the Y-axis, away from the first flow portion 95. The third flow portion 97 is perpendicular to the Y-axis. The fourth flow portion 98 extends from the bottom end of the third flow portion 97 along the Z-axis, away from the first flow portion 95, along the Y-axis. The fourth flow portion 98 is perpendicular to the Z-axis. In this embodiment, the fourth flow portion 98 forms a first load terminal 99. The first load terminal 99 is used to connect to an external power source or one phase of a load. For ease of description, the first load terminal 99 is assumed to be connected to an external power source.

[0160] As shown in FIG. 22, in this embodiment, the second static contact member 93 is provided with a second static 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 static contact points 100 is the same as that of the second moving contact points 76 in the corresponding moving contact member group 13 and they correspond to each other one by one. In this embodiment, the number of the second static contact points 100 is two and they are arranged along the Z-axis direction. The second static contact point 100 is adapted to contact or separate from the corresponding second moving contact point 76 along the Y-axis direction. In this embodiment, the first static contact point 94 and the second static contact point 100 are arranged along the X-axis direction. Each second static contact point 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 along the Y-axis direction away from the fifth current-carrying portion 101, 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 through 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 connecting to one phase of an external load or a power supply. For the convenience of introduction, it is assumed that the second load terminal 105 is connected to an external load.

[0161] Referring to FIGS. 2 and 27, FIGS. 2 and 27 show the second magnetic conductor group 16 in this embodiment. As shown in FIG. 2, the number of the second magnetic conductor groups 16 is the same as that of the first magnetic conductor groups 15 and they correspond to each other one by one. 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 groups 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 each other one by one with the number of the first magnetic conductors 77 in the corresponding first magnetic conductor group 15, or may not be the same and not correspond to each other one by one. 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 can also be in an L shape or a U shape. As long as the first magnetic conductor group 15 and the second magnetic conductor group 16 can form a magnetic circuit. As shown in FIG. 27, 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.

[0162] Referring to Figures 23 to 27 , Figures 23 to 27 illustrate the contact portion 5 of this embodiment. As previously described, in this embodiment, the contact portion 5 includes contact member groups 11 and anti-short-circuit units 12. The number of contact member groups 11 and anti-short-circuit units 12 is the same and corresponds one-to-one to each other. In this embodiment, there are three contact member groups 11. Each contact member group 11 includes a movable contact member group 13 and a stationary contact member group 14. Each anti-short-circuit unit 12 includes a first magnetic conductive member group 15 and a second magnetic conductive member group 16.

[0163] As shown in Figure 23, in this embodiment, within the same contact assembly 11, the movable contact assembly 13 is adapted to contact or move away from the stationary contact assembly 14 along the Y-axis direction. As previously described, when the armature assembly 10 is in the first position, the movable contact assembly 13 moves away from the stationary contact assembly 14 along the Y-axis direction, the relay 1 is in the off state, and the electrical connection to the external circuit is disconnected. When the armature assembly 10 is in the second position, the movable contact assembly 13 contacts the stationary contact assembly 14 along the Y-axis direction, the relay 1 is in the on state, and the electrical connection to the external circuit is connected. Specifically, each first movable contact 75 in the movable contact assembly 13 is adapted to contact or move away from each first stationary contact 94 in the stationary contact assembly 14 along the Y-axis direction, and each second movable contact 76 in the movable contact assembly 13 is adapted to contact or move away from each second stationary contact 100 in the stationary contact assembly 14 along the Y-axis direction.

[0164] As shown in Figure 23, in this embodiment, the second magnetic conductors 106 are positioned along the X-axis between each first static contact 94 and each second static contact 100 in the corresponding static contact group 14. The second magnetic conductors 106 are also positioned along the Y-axis between the overcurrent bridge 73 and the reverse overcurrent portion 103. When the movable contact group 13 contacts the static contact group 14, the extensions 79 of each first magnetic conductor 77 in the first magnetic conductor group 15 approach 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 positioned along the X-axis between the first static contact 92 and the second static contact 93. The protrusions 23 provided on the insulator 107 serve to increase the creepage distance between the first static contact 92 and the second static contact 93 along the X-axis. Alternatively, the insulator 107 may be provided with grooves, each groove being used to increase the creepage distance between the first static contact 92 and the second static contact 93 along the X-axis. Each protrusion 23 or each groove may be one or more. When there are multiple protrusions 23 or grooves, they are arranged along the X-axis. The extension direction of each protrusion 23 or each groove intersects the X-axis. In this embodiment, the protrusions 23 or grooves extend along the Y-axis.

[0165] As shown in Figure 24, when the moving contact assembly 13 contacts the static contact assembly 14, the electrical connection between the power supply and the load is established. At this point, the current flows as shown in the figure, flowing from the power supply through the first load terminal 99 (fourth overcurrent section 98), the third overcurrent section 97, the second overcurrent section 96, the first overcurrent section 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 section 101, the sixth overcurrent section 102, the reverse overcurrent section 103, the seventh overcurrent section 104, and the second load terminal 105 to the load. At this point, the current flowing through the overcurrent bridge 73 flows to the right along the X-axis, while the current flowing through the reverse overcurrent section 103 flows to the left along the X-axis, with the two current directions being opposite. According to the right-hand screw theorem, the current flowing through the overcurrent bridge 73 forms the third magnetic field L, and the current flowing through the reverse overcurrent section 103 forms the fourth magnetic field M.

[0166] As shown in Figures 25 to 27, in the third magnetic field L formed by the current bridge 73, the two first magnetic conductors 77 and the second magnetic conductor 106 are magnetized, forming two magnetic circuits. In the main body 78 of the first magnetic conductor 77, the magnetic flux lines of the magnetic circuit are oriented from bottom to top along the Z-axis. In the extension 79 located above the first magnetic conductor 77 along the Z-axis, the magnetic flux lines of the magnetic circuit are oriented from back to front along the Y-axis. In the second magnetic conductor 106, the magnetic flux lines of the magnetic circuit are oriented from top to bottom along the Z-axis. In the extension 79 located below the first magnetic conductor 77 along the Z-axis, the magnetic flux lines of the magnetic circuit are oriented from front to back along the Y-axis. The magnetic circuit formed by the third magnetic field L creates an attractive force between the first magnetic conductor 77 and the second magnetic conductor 106, and the greater the current, the greater the attractive force between the two. The fourth magnetic field M formed by the reverse flow portion 103 affects the second magnetic conductor 106. The direction of the magnetic flux lines of the fourth magnetic field M on one side of the second magnetic conductor 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 magnetic conductor 106. Therefore, the attraction formed between the first magnetic conductor 77 and the second magnetic conductor 106 is stronger.

[0167] Referring to Figures 28 and 29 , these illustrate the guide member 6 in this embodiment. The guide member 6 is used to guide the linear motion of the push card 58 along the Y-axis. As shown in Figure 29 , the guide member 6 extends along the Y-axis. In this embodiment, the guide member 6 is made of metal. One of the push card 58 and the housing 18 is fixedly connected to the guide member 6, while the other slides with the guide member 6 along the Y-axis. In this embodiment, the push card 58 is fixedly connected to the guide member 6, while the housing 18 slides 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 number of mating portion groups 27 are equal and correspond one-to-one. There are two guide members 6, arranged along the X-axis. The guide members 6 pass through corresponding mounting holes 68 in the push card 58 and are fixed to the push card 58 through an interference fit with the mounting holes 68. The guide members 6 slide with the two mating portions 28 in the corresponding mating portion groups 27, specifically with the guide grooves. 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.

[0168] Referring to Figures 29 to 31 , the elastic member 7 in this embodiment is shown. As shown in Figure 29 , the elastic member 7 is mounted on the base housing 20 and is used to provide propulsion assistance 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, there are two elastic members 7. The two elastic members 7 are located on either side of the push card 58 along the X-axis and on the back side of the connecting portion 65. The elastic member 7 is fixed to the base housing 17 and has elastic properties. In this embodiment, the elastic member 7 is also provided in correspondence with the guide member 6. When the movable contact assembly 9 moves away from the stationary contact assembly 10, the elastic member 7 stores energy due to deformation, and releases this energy when the movable contact assembly 9 moves toward the stationary contact assembly 10. As shown in Figure 30 , the elastic member 7 comprises a fixed portion 108, a first bent portion 109, a push surface 110, and an escape groove 111, which are integrally connected. The fixing portion 108 is fixedly connected to the bottom housing 20, and the first bent portion 109 is bent to provide elasticity to the elastic member 7. As shown in Figures 30 and 31, the abutting surface 110 is used to abut the back surface of the connecting portion 65. The avoidance groove 111 allows the corresponding guide member 6 to pass through and is configured to avoid contact with the guide member 6.

[0169] Referring to Figures 29 and 32, Figures 29 and 32 illustrate the microswitch 8 in this embodiment. The microswitch 8 in this embodiment is used to transmit a relay status signal to an external relay status sensing circuit. As shown in Figure 29, the microswitch 8 includes two fixed contacts 112 and a movable spring 113. As shown in Figure 32, the two fixed contacts 112 are arranged along the X-axis. The fixed contacts 112 are fixedly connected to the bottom housing 20 and extend along the Z-axis. Both fixed contacts 112 are equipped with a signal output terminal 114. The signal output terminal 114 extends through the bottom housing 20 along the Z-axis and extends from the bottom surface of the bottom housing 20 to electrically connect to the relay status sensing circuit (see Figure 2). In this embodiment, the movable spring 113 includes a fixing portion 115, a second bent portion 116, and a bridging portion 117. The fixing portion 115 is fixedly connected to the bottom housing 20, and the bridging portion 117 is used to conduct electricity between the two fixed contacts 112. The second bent portion 116 is located between the fixed portion 115 and the bridging portion 117 and is bent to provide elasticity to the movable spring 113. The movable spring 113 is adapted to be pushed by the pushing portion 66 and deformed to contact the two fixed contacts 112. When the pushing portion 66 is moved away, the movable spring 113 recovers its deformation and moves away from the two fixed contacts 112. As described above, 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 contact the fixed contacts 112, thereby transmitting a relay status signal indicating that the relay 1 is in the off state to the relay status sensing circuit. When the armature assembly 10 is in the second position, the pushing portion 66 moves away from the movable spring 113, causing the movable spring 113 to recover its deformation and move away from the fixed contacts 112, thereby transmitting a relay status signal indicating that the relay 1 is in the on state to the relay status sensing circuit.

[0170] The working principle of the relay 1 in this embodiment is introduced below. The working principle of the magnetic circuit part 3 has been described above and will not be repeated here.

[0171] Refer to Figure 28, which shows the structure of the relay 1 in the initial state. As shown in Figure 28, in the initial state, the relay 1 is in the off state. At this time, the armature assembly 10 remains 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 and stores energy. The pushing portion 66 pushes against the movable spring 113, causing the movable spring 113 to deform and press against the two fixed contacts 112. 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.

[0172] When the signal input terminal 36 receives the first pulse signal, the coil winding 32 temporarily forms a first magnetic field. The two magnetic drive ends 39 use a magnetic driving force to drive the armature assembly 10 from the first position to the second position along the Y-axis. At this point, the elastic member 7 and the movable spring 113 recover their deformation and release energy. Under the magnetic driving 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 accelerates toward the static contact assembly 14. After the movable contact assembly 13 contacts the static contact assembly 14, electrical conduction is established between the first load terminal 99 and the second load terminal 105, and power is supplied to the load through the relay 1. Under the magnetic driving force of the two magnetic drive ends 39, the armature assembly 10 and the pusher 58 enter overtravel and continue to move toward the static contact 14. The elastic bracket assembly 60 begins to store energy, and the movable contact assembly 13 no longer abuts the stopper 61, forming a contact force, until the armature assembly 10 is restrained by the two magnetic drive ends 39 and the armature assembly 10 moves to the second position.

[0173] Refer to Figure 25, which shows the structure of the relay 1 in the on state. As shown in Figure 25, when the armature assembly 10 moves to the second position, the movable contact group 13 contacts the static contact group 14, the electrical connection between the first load terminal 99 and the second load terminal 105 is connected, and the power supply supplies power to the load. The movable contact group 13 no longer presses 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 push portion 66 moves away from the movable spring 113, causing the movable spring 113 to restore its deformation and move 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. As shown in Figure 25, when the armature assembly 10 moves to the second position, the blocking portion 30 approaches the push card 58 to isolate the adjacent contact chambers 29. It should be noted that in other embodiments, the barrier portion 30 may also be provided on the push card 58 , as long as the barrier portion 30 is located between adjacent contact groups 11 when the movable contact group 13 contacts the static contact group 14 .

[0174] 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 .

[0175] When the signal input terminal 36 receives the second pulse signal, the coil winding 32 temporarily forms a second magnetic field. The two magnetic drive ends 39 use a magnetic drive force to drive the armature assembly 10 from the second position to the first position along the Y-axis. At this time, the elastic support assembly 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 support assembly 60, the armature assembly 10 and the push card 58 move with acceleration in a direction away from the static contact assembly 14 until the movable contact assembly 13 leaves the static contact assembly 14. The elastic support assembly 60 partially recovers its deformation and pushes the movable contact assembly 13 against the limit member 61. At this time, the electrical connection between the first load terminal 99 and the second load terminal 105 is disconnected, the relay 1 is in the off state, and the power supply cannot supply power to the load. Afterwards, the movable component 17 as a whole continues to move away from the stationary contact assembly 14, pushing the card 58 against the elastic member 7, causing it to deform and store energy. The pushing portion 66 pushes against the movable spring 113, causing the movable spring 92 to deform, store energy, and contact the two fixed contacts 112. Electrical conduction is established between the two signal output terminals 114, and the relay state sensing circuit detects that 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 first position shown in Figure 28.

[0176] 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 portion 3 .

[0177] The electric meter in this embodiment adopts the above-mentioned relay 1.

[0178] As shown in Figure 33 , the electric meter 1 in this embodiment also includes a transformer 118. Transformer 118 is used to convert high current into low current for measurement. In this embodiment, there are three transformers 118 , arranged along the X-axis and mounted on the portions of the second static contacts 93 of the three static contact groups 14 that extend out of the accommodating member 2. In other embodiments, transformers 118 may also be mounted on the portions of the first static contacts 92 of the three static contact groups 14 that extend out of the accommodating member 2.

[0179] This embodiment presents a highly innovative improvement to the magnetic circuit portion 3 of the prior art swing-type magnetic latching relay. Based on the coil assembly 9 of the swing-type magnetic latching relay, this embodiment improves the parallel arrangement of the two armatures 43 fixed to the permanent magnet 42 to an intersecting arrangement with the intersecting portions 55 spaced apart, allowing the armature assembly 10 to transition from swinging relative to the coil assembly 9 to linear motion relative to the coil assembly 9. Compared to the magnetic circuit portion 3 of the prior art swing-type magnetic latching relay, 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. This allows for greater space utilization of the relay 1 and creates more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary 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 the relay 1 to have a very long length 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.

[0180] 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 attracting 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 that runs through the entire coil assembly 9 can also 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 and closed magnetic circuit regardless of whether they are in the magnetic holding state or the magnetic driving state. This complete magnetic circuit does not cause large magnetic losses due to the working air gap between the two attracting 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 safety 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 pass 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 dynamic contact 72 and the static contact 89 being separated due to the fault current, resulting in destructive arcing.

[0181] In this embodiment, when the armature assembly 10 is in a magnetic holding state at the first position, when the coil assembly 9 is excited 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 attraction part 51 and the third attraction part 53, but also the fourth attraction part 54 and the second attraction 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 running 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 and closed pushing magnetic circuit. There is only a necessary stroke 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 exert 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 attraction part 54 and the second attraction part 52, but also the first part of the pushing magnetic circuit without an air gap is formed between the first attraction part 51 and the third attraction part 53 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 and closed pushing magnetic circuit. The pushing magnetic circuit also only has the necessary stroke air gap, and no other air gaps, and therefore has the same technical effect.

[0182] In this embodiment, when the armature assembly 10 is in the magnetically latched state in the second position and the movable contact 72 contacts the stationary contact 89 to conduct the external circuit, the armature assembly 10 forms a first portion of a latching magnetic circuit with no air gap between the second engaging portion 52 and the fourth engaging portion 54. The two magnetic drive ends 39 form a second portion of the latching magnetic circuit through the coil assembly 9, which extends throughout the coil assembly 9. The first and second portions of the latching magnetic circuit constitute a complete latching magnetic circuit. This latching magnetic circuit is completely closed when the second engaging portion 52 and the fourth engaging portion 54 attract the two magnetic drive ends 39. When the second engaging portion 52 and the fourth engaging portion 54 are positioned close to the two magnetic drive ends for other reasons, the air gap is also very small. Therefore, the magnetic efficiency of the armature assembly 10 in the magnetic latching state is improved, resulting in greater magnetic latching force and higher reliability. In particular, when the relay 1 is subjected to a large fault current, the armature assembly 10 is less likely to escape the magnetic latching state and move, which helps prevent the movable contact 72 and the stationary contact 89 from separating due to the fault current, thereby preventing destructive arcing.

[0183] In this embodiment, for the two magnetic drive ends 39 arranged in the X-axis direction, the magnetic fields of the two engaging portions 50 that engage or approach them are generated by the same permanent magnet 42. Therefore, the magnetic driving forces exerted on the armature assembly 10 during movement from the first position to the second position, or vice versa, are comparable in magnitude, with minimal variation. Consequently, the magnetic driving forces during on-off switching of the relay 1 are better balanced, the armature assembly 10 is less likely to distort during linear motion, and the relay 1 is less likely to become stuck and has a longer lifespan.

[0184] In this embodiment, since the first attraction portion 51 and the second attraction portion 52 are respectively located at the two ends of the first armature 48 along the X-axis direction, and the third attraction portion 53 and the fourth attraction 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 attraction portion 51 and the second attraction portion 52, and the position where the second armature 49 is fixed to the permanent magnet 42 is also located between the third attraction portion 53 and the fourth attraction portion 54. This arrangement makes the difference in magnetic field strength between the two attraction portions 50 of the same armature 43 smaller, and when the armature assembly 10 is in the magnetic drive 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 surface 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 dynamic contact 72 and the static contact 89 in a limited space.

[0185] 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 attraction portion 54 and the second attraction 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.

[0186] 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 dynamic contact 72 and the static contact 89.

[0187] In this embodiment, the axis of the coil winding 32 is perpendicular to the direction of movement of the armature assembly 10. This layout facilitates space for the armature assembly 10 to move along the Y-axis, making the structure of the entire magnetic circuit portion 3 more compact and occupying less space. This, in turn, facilitates increasing the safe distance between the movable contact 72 and the stationary contact 89 within a limited space. Furthermore, in this layout, since the relay 1 has a limited number of other components distributed along the axis of the coil winding 32, it is easier to fully utilize the limited space, extend the axial length of the coil winding 32, and enable the coil winding 32 to output a greater magnetic field strength, thereby facilitating an increase in the magnetic driving force of the two magnetic drive ends 39 and creating more favorable conditions for increasing the safe distance between the movable contact 72 and the stationary contact 89 within a limited space.

[0188] 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 the two armatures 43 can be prevented from being excessively bent, 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.

[0189] 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. This is beneficial because the width of the armature assembly 10 along the Z-axis direction is not increased under the premise that the intersecting portions 55 are spaced apart along the Z-axis direction. The two armatures 43 have a larger width in the portions other than the intersecting portions 55, which can ensure that the armature 43 has a larger magnetic conductivity area and magnetic conductivity efficiency.

[0190] In this embodiment, the position where the armature 43 and the permanent magnet 42 are fixed 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 helping to increase the movement stroke of the armature assembly 10 along the Y-axis, thereby helping to increase the distance between the dynamic contact 72 and the static contact 89.

[0191] 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.

[0192] In this embodiment, there are at least two permanent magnets 42, one located on either side of the intersecting portion 55, and each armature 43 is fixedly connected to the same magnetic pole of each permanent magnet 42. Compared to a solution in which only one permanent magnet 42 is located on one side of the intersecting portion 55, this solution is more conducive to maintaining consistency in the magnetic field strength on both sides of the armature assembly 10 along the X-axis. This reduces linear motion of the armature assembly 10, reduces jamming, and prolongs the life of the relay 1.

[0193] In this embodiment, permanent magnets 42 are disposed on either side of the intersecting portion 55. This effectively utilizes the space occupied by the armature assembly 10 to increase the magnetic force between the magnetic drive end 39 and the armature assembly 10 without increasing the dimensions of the armature assembly 10 along the Y and Z axes. This further facilitates increasing the safe distance between the movable contact 72 and the stationary contact 89. Because each permanent magnet 42 is connected by two armatures 43, the difference in magnetic field strength between each permanent magnet 42 is effectively reduced across the two armatures 43. The magnetic pushing force between the armatures 43 and the magnetic drive end 39 on both sides is more balanced along the X-axis, thereby reducing the risk of jamming and extending the life of the relay 1.

[0194] In this embodiment, when more than two permanent magnets 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 42, it is more conducive to increasing the distance between the moving contact 72 and the static contact 89.

[0195] In this embodiment, the projection of the armature assembly 10 on the first projection plane U is mirror-symmetrical along the symmetry plane V perpendicular to the X-axis direction, 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 more easily maintained 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.

[0196] In this embodiment, each movable contact 72 is provided with a current bridge 73, a first movable contact 75, and a second movable contact 76. The first and second stationary contacts 92, 93 are each electrically connected to an external circuit. This allows the safe distance between the movable contact 72 and the stationary contact 89 to be effectively twice the distance between the movable contact 74 and the stationary contact 90. This effectively increases the safe distance between the movable contact 72 and the stationary contact 89. This is because, in this embodiment, the safe distance between the movable contact 72 and the stationary contact 89 refers to the distance between the stationary contacts 90 of the two stationary contacts 89 when the movable contact 72 is away from the two stationary contacts 89. Therefore, this distance is twice the actual distance between the movable contact 74 on the movable contact 72 and the stationary contact 90 on the stationary contact 89. Furthermore, in this technical solution, the two stationary contacts 89 are each electrically connected to an external circuit. This simplifies the electrical connection structure and facilitates assembly compared to separate electrical connections of the movable contact 72 and the stationary contact 89.

[0197] In this embodiment, the number of the movable contact groups 13 is at least two, so that the relay 1 can control the on and off of more external circuits.

[0198] In this embodiment, the number of the movable 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.

[0199] In this embodiment, each moving contact group 13 is arranged along the X-axis direction and contacts or is 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 part 2 to save copper loss.

[0200] The layout of this embodiment also allows the coil assembly 9, whose axis extends along the X-axis direction, to be free of contact portions 5 on both sides along the X-axis direction. Therefore, there is ample space for the coil assembly 9 in the axial direction. Without increasing the overall size of the relay 1, the length of the coil assembly 9 can be increased in the X-axis direction as needed to increase the magnetic driving force, which is beneficial to increasing the safe distance between the moving contact 72 and the static contact 89.

[0201] 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.

[0202] In this embodiment, each movable contact 72 in each movable contact group 13 is arranged along the Z-axis, making fuller use of the space in the Z-axis to increase load capacity. The first movable contact 75 and the second movable contact 76 of each movable contact 72 are arranged along the X-axis, and accordingly, the first static contact 92 and the second static contact 93 in the corresponding static contact group 14 are also necessarily arranged along the X-axis. Since each movable contact group 13 is arranged along the X-axis, all static contacts 89 are arranged along the X-axis, facilitating the extension of all static contacts 89 along the Y-axis or the Z-axis to lead the load terminal 91 out of the accommodating member 2. Therefore, the layout of each static contact 89 is more reasonable, better ensuring the distance between adjacent static contacts 89, and more effectively utilizing the limited space, creating more favorable conditions for increasing the safe distance between the movable contact 72 and the static contact 89. At the same time, since the static contacts 89 are arranged along the X-axis direction, it is easier to install the mutual inductor 118 on the portion where the static contacts 89 are led out of the accommodating member.

[0203] In this embodiment, the static contact group 14 is arranged along the X-axis direction, and in the static contact group 14, the 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.

[0204] In this embodiment, the first flow portion 95 extends along the Z-axis direction, facilitating the arrangement of the first static contact 94 along the Z-axis direction; the fifth flow portion 101 extends along the Z-axis direction, facilitating the arrangement of the second static contact 100 along the Z-axis direction.

[0205] In this embodiment, the second flow portion 96 extends from the first flow portion 95 along the Y-axis direction on a side away from the second static contact 93 along the X-axis direction, and the second flow portion 96 is perpendicular to the X-axis direction, so that the second flow portion 96 can provide space for installing the mutual inductor 118 on the second static contact 93.

[0206] In this embodiment, the third flow portion 97 extends from the second flow portion 96 along the Y-axis direction away from one end of the first flow portion 95 and along the X-axis direction away from the second static contact 93, and the fourth flow portion 98 extends from the bottom end of the third flow 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 makes way for the installation of the transformer 118 for the seventh flow portion 104.

[0207] 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.

[0208] 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 terminals of the transformer 118 to extend along the Z-axis direction.

[0209] In this embodiment, the mutual inductor 118 is suitable for being installed in the seventh current-passing portion 104 of the second contact member 93, so that the first static contact member 92 will not protrude too much from the accommodating member 2 along the X-axis direction. In particular, 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.

[0210] In this embodiment, the push card 58 is fixedly connected to the armature assembly 10, and each movable contact group 13 is mounted on and supported by the push card 58. This allows the armature assembly 10's motion along the Y-axis to be better converted into the motion of the movable contact 72, avoiding loss of driving force and motion. Compared to swing-type magnetic latching relays in the prior art, it is precisely because of the aforementioned magnetic circuit portion 3 that the armature assembly 10 is fixedly connected to the push card 58. Furthermore, compared to direct-acting magnetic latching relays in the prior art, it is precisely because of the aforementioned magnetic circuit portion 3 that the armature assembly 10 has a larger dimension in the X-axis direction, which is perpendicular to its motion direction, rather than achieving linear motion through a small-diameter push rod. In this embodiment, the push card 58 is used to mount and support each movable contact group 13. Therefore, when the movable contact group 13 is arranged along the X-axis, it can avoid problems such as jamming or a reduction in life due to severe wear.

[0211] 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.

[0212] In this embodiment, the size of the accommodating portion 64 along the X-axis direction is larger than the size along the Y-axis direction, and in each longitudinal section of the pushing card 58 perpendicular to the Y-axis direction, the size of the longitudinal section located in the accommodating portion 64 along the X-axis direction is the smallest among the sizes of each longitudinal section of the pushing card 58 along the X-axis direction. That is, in the Y-axis direction, no connecting rod is provided between the accommodating portion 64 and the connecting portion 65, so that the moving component 17 no longer occupies too large a size in the Y-axis direction, and can create more favorable conditions for increasing the safety distance between the moving contact 72 and the static contact 89 in a limited space. Therefore, when each moving contact group 13 is arranged along the X-axis direction and the moving contact 72 is extended along the X-axis direction, it is less likely to get stuck than the existing technology.

[0213] In this embodiment, the connection portion 65 for mounting and carrying each movable contact assembly 13 extends along the X-axis direction perpendicular to the movement direction of the push card 58 , which is beneficial for arranging the movable contact assembly 13 along the X-axis direction.

[0214] In this embodiment, the elastic support assembly 60 stores energy when the movable contact assembly 13 contacts the static contact assembly 14, providing stable contact pressure to the movable contact assembly 13. The elastic support assembly 60 then releases energy when the movable contact assembly 13 moves away from the static contact assembly 14. This effectively generates additional repulsive force between the movable contact assembly 13 and the static contact assembly 14 when controlling the shutdown of the external circuit, helping the movable contact assembly 13 move away from the static contact assembly 14. In particular, when an anti-short-circuit unit 12 for resisting high fault currents is provided between the movable contact assembly 13 and the static contact assembly 14, when the movable contact assembly 13 contacts the static contact assembly 14, the current flowing through the movable contact 72 forms a magnetic circuit in the anti-short-circuit unit 12, thereby generating an attractive force between the movable contact assembly 13 and the static contact assembly 14. At this time, the repulsive force generated by the elastic force of the elastic support assembly 60 can offset or partially offset the corresponding attractive force when the load current is normal, thereby helping the movable contact assembly 13 to reliably move away from the static contact assembly 14.

[0215] 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 the number of dynamic contacts 72 in the dynamic contact group 13 and corresponds to each other one by one. Each dynamic contact 72 is installed on the corresponding elastic support part 82. Therefore, each dynamic contact 72 can adjust its posture by a relatively independent elastic support part 82, which is more conducive to the first dynamic contact 75 and the second dynamic contact 76 on the dynamic contact 72 to reliably contact the corresponding static contact group 14.

[0216] In this embodiment, the elastic support portion 82 includes two elastic arms 84 fixedly connected to the current bridge 73 , which facilitates the movable contact 72 to swing freely to adjust its posture.

[0217] In this embodiment, the positions where the two elastic arms 84 are fixed to the overcurrent 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.

[0218] In this embodiment, the limit member 61 is fixed relative to the push card 58 and contacts each dynamic contact 72 along the Y-axis direction when the corresponding dynamic contact group 13 is away from the static contact group 14 to limit the distance between each dynamic contact 72 and the static contact group 14. Therefore, the setting of the limit member 61 can ensure a safe distance between each dynamic contact 72 and the static contact group 14, and can avoid the problem that the distance between some dynamic contacts 72 and the static contact group 14 is too close due to the inconsistent elasticity of the elastic bracket group 60.

[0219] 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.

[0220] 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 movement of the push card 58, avoid jamming and skewness of the push card 58 during movement, and effectively ensure that each dynamic contact member 72 reliably contacts the static contact member 89.

[0221] 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.

[0222] In this embodiment, the elastic member 7 stores energy due to deformation when the moving contact group 13 moves in the direction away from the static contact group 14, and releases energy due to recovery of deformation when the moving contact group 13 moves in the direction close to the static contact group 14. This can better help the moving component 17 move from the first position to the second position, reduce the initial power required by the coil assembly, and thus help reduce the volume of the coil assembly. In addition, it can also provide conditions for increasing the movement stroke of the moving contact 72, and therefore is also beneficial to increase the safety distance between the moving contact 72 and the static contact 89.

[0223] In this embodiment, the provision of the anti-short-circuit unit 12 enables the first and second magnetic conductive groups 15 and 16 to form a magnetic circuit when current flows through the movable contact group 13, thereby generating an attractive force between the first and second magnetic conductive groups 15 and 16. This attractive force increases with increasing current, thereby preventing the movable contact group 13 from separating from the stationary contact group 14 when a large fault current impacts the contact portion 5, thereby preventing destructive arcing.

[0224] 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, since the current direction of the reverse overcurrent portion 103 is opposite to that of the current 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 the moving contact group 15 and the static contact group 16 less likely to separate under 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 magnetic group 15 driven by the push block 58 can also move linearly along the Y-axis direction, so that the first magnetic group 15 can move stably and form a stable relative position relationship with the second magnetic group 16 when the moving contact group 13 and the static contact group 14 are closed, and reliably form the expected smaller magnetic gap with the second magnetic group 16, ensuring that there is a stable and reliable magnetic attraction effect between the first magnetic group 15 and the second magnetic group 16, so that the moving contact group 13 and the static contact group 14 are not easy to separate under large fault current.

[0225] In this embodiment, the second magnetic conductive group 16 is covered by the insulator 107 , which increases 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 provision of the second magnetic conductive group 16 .

[0226] In this embodiment, the insulator 107 is formed in the receiving part 2 . Compared with providing a separate insulator 107 , it occupies less space and has a higher degree of integration of the relay.

[0227] In this embodiment, since a protrusion 23 or a groove is provided on the outer surface of the insulator 107 covering the second magnetic conductive body 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 conductive through the surface of the insulator 107, so short circuit is less likely to occur.

[0228] 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 .

[0229] In this embodiment, the first magnetic conductor 77 is positioned corresponding to the movable contact 72. This allows the magnetic circuit to more effectively concentrate the magnetic field generated by the current flowing through the movable contact 72, minimizing magnetic losses and increasing the attractive force between the first magnetic conductor 77 and the second magnetic conductor 106. The first magnetic conductor 77 is fixedly attached to the movable contact 72, making installation of the first magnetic conductor 77 more convenient.

[0230] In this embodiment, the two extension portions 79 span the moving contact 72 and approach 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.

[0231] In this embodiment, the second magnetic conductive body group 16 has only one second magnetic conductive body 107 , so installation is more convenient.

[0232] In this embodiment, the second magnetic conductive assembly 16 is fixed in the receiving cavity 22 of the bottom shell 20 , making the second magnetic conductive assembly 16 easier to install.

[0233] In this embodiment, the barrier 30 is provided between adjacent contact cavities to prevent short circuits between adjacent static contact groups 14, which could result in short circuits between two phases of the three-phase AC power. It also prevents arcing in some contact groups 11 from being transmitted to other contact groups 11, which could cause short circuits between two phases. In other embodiments, the barrier 30 could be provided on the push card 58, which would also serve a similar purpose.

[0234] In this embodiment, when the movable contact assembly 13 contacts the stationary contact assembly 14 , the barrier portion 30 separates the adjacent contact cavities 29 , so the barrier portion 30 has a better barrier effect.

[0235] In this embodiment, the barrier portion 30 is formed on the accommodating member 2 and is a part of the accommodating member 2. It can be integrally injection molded when manufacturing the accommodating member 2, thus having high integration and simpler manufacturing. The barrier portion 30 formed on the push card 58 also has a similar effect.

[0236] In this embodiment, a plurality of partition cavities 25 are 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.

[0237] 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 is slidably matched with the guide member 6, which can also guide the linear motion of the pushing card 58 and support the pushing card 58.

[0238] In this embodiment, the 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, it can be effectively guided, thereby better preventing the moving component 17 from getting stuck or skewed.

[0239] In this embodiment, the position where the guide member 6 and the push card 58 are slidably engaged or fixedly connected is located between the two mating portions 70 of the corresponding mating portion group 69 along the Y-axis direction. This facilitates the guide member 6 to remain extended along the Y-axis direction during assembly and prevent it from tilting or shaking along the X-axis direction. Moreover, when the direction of gravity is the Z-axis direction, the guide member 6 can also be supported, and the moving component 17 formed by the armature assembly 10, the push card 58, and the various movable contact groups 13 can be supported through the guide member 6. In particular, when there are three movable contact groups 13 arranged along the X-axis direction, the weight of the movable component 17 is relatively large. Therefore, the two mating portions 70 in the mating portion group 69 support the movable component 17 in the direction of gravity of the movable component 17, preventing the movable component 17 from tilting in the direction of gravity.

[0240] 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 .

[0241] The above description of the specification and embodiments is used to explain the scope of protection of the present application, but does not constitute a limitation on the scope of protection of the present application.

Claims

1. A contact portion, wherein: include: A static contact assembly (14) provided with a reverse flow portion (103); A moving contact group (13) contacts or moves away from the stationary contact group (14) along the Y-axis direction, and its flow direction is opposite to the flow direction of the reverse flow portion (103) along the X-axis direction; and An anti-short circuit unit (12) comprises a first magnetic conductive group (15) fixed relative to the moving contact group (13) and a second magnetic conductive group (16) fixed relative to the stationary contact group (14), wherein the first magnetic conductive group (15) and the second magnetic conductive group (16) form a magnetic circuit when the moving contact group (13) is flowing with current, so that the first magnetic conductive group (15) and the second magnetic conductive group (16) form an attractive force along the Y-axis direction to make the moving contact group (13) contact the stationary contact group (14); and the second magnetic conductive group (16) is at least partially located along the Y-axis direction between the moving contact group (13) and the reverse flow portion (103).

2. A contact portion according to claim 1, wherein The static contact group (14) includes two static contacts (89) arranged along the X-axis direction, and the reverse flow portion (103) is formed on one of the two static contacts (89); the dynamic contact group (13) includes at least one dynamic contact (72), the dynamic contact (72) is suitable for contacting or moving away from the two static contacts (89) and is provided with a flow bridge (73) extending along the X-axis direction, and the second magnetic conductor group (16) is at least partially located between the flow bridge (73) and the reverse flow portion (103) along the Y-axis direction.

3. A contact portion according to claim 2, wherein: The two static contact members (89) are respectively a first static contact member (92) and a second static contact member (93); The second static contact (93) is provided with a seventh flow portion (104), and the seventh flow portion (104) extends along the Y-axis direction; the seventh flow portion (104) is perpendicular to the Z-axis direction.

4. A contact portion according to claim 3, wherein: The seventh current flow portion (104) can be used for installing a mutual inductor.

5. A contact portion according to claim 4, wherein: The first static contact (92) is provided with a first static contact point (94), a first flow portion (95) and a second flow portion (96); the first static contact point (94) is fixed to the first flow portion (95); the first flow portion (95) extends along the Z-axis direction; the second flow portion (96) extends from the first flow portion (95) along the X-axis direction away from the side of the second static contact (93) along the Y-axis direction, and the second flow portion (96) is perpendicular to the X-axis direction.

6. A contact portion according to claim 5, wherein: The first static contact member (92) is further provided with a third flow portion (97) and a fourth flow portion (98), wherein the third flow portion (97) extends from one end of the second flow portion (96) along the Y-axis direction away from the first flow portion (95) and along the X-axis direction away from the second static contact member (93); and the fourth flow portion (98) extends from the bottom end of the third flow portion (97) along the Z-axis direction and along the Y-axis direction away from the first flow portion (95).

7. A contact portion according to claim 4, wherein: The reverse flow portion (103) is arranged on the second static contact (93), and the second static contact (93) is also provided with a second static contact (100), a fifth flow portion (101) and a sixth flow portion (102); the second static contact (100) is fixed to the fifth flow portion (101); the sixth flow portion (102) extends from the side of the fifth flow portion (101) along the X-axis direction close to the first static contact (92) and along the Y-axis direction away from the moving contact group (13); the reverse flow portion (103) extends from one end of the sixth flow portion (102) along the Y-axis direction away from the fifth flow portion (101) and along the X-axis direction close to the first static contact (92); the seventh flow portion (104) extends from the reverse flow portion (103) along the Y-axis direction.

8. A contact portion according to claim 2, wherein: The first magnetic conductive group (15) and the second magnetic conductive group (16) are arranged along the Y-axis direction. The first magnetic conductive group (15) includes at least one first magnetic conductive body (77). The first magnetic conductive body (77) is provided with a body (78). The body (78) is located on the back side of the overcurrent bridge (73) away from the static contact member group (14).

9. A contact portion according to claim 4, wherein: The first magnetic conductor (77) is further provided with an extension portion (79), which extends from the main body (78) along the Y-axis direction. When the movable contact group (13) contacts the static contact group (14), the extension portion (79) approaches the second magnetic conductor group (16) along the Y-axis direction.

10. A contact portion according to claim 2, wherein: The two static contact members (89) are respectively provided with a static contact point (90), and the second magnetic conductive body group (16) is located between the static contact points (90) of the two static contact members (89) along the X-axis direction.

11. A contact portion according to claim 10, wherein: The second magnetic conductive body group (16) is covered by an insulator (107).

12. A contact portion according to claim 11, wherein: The outer surface of the insulator (107) is provided with a protrusion (23) or a groove, and the extension direction of the protrusion (23) or the groove intersects with the X-axis direction.

13. A relay, wherein: It comprises an accommodating part (2) and a contact portion (5) according to any one of claims 1 to 12, wherein the accommodating part (2) is used to accommodate the contact portion (5); the static contact group (14) extends out of the front surface of the accommodating part (2) along the Y-axis direction.

14. A relay as claimed in claim 13, wherein: The invention also includes an armature assembly (10) and a push card (58); the armature assembly (10) moves along the Y-axis direction; the push card (58) and the armature assembly (10) are fixedly connected as a whole; the movable contact member group (13) is installed on the push card (58) and is carried by the push card (58) to contact or move away from the static contact member group (14) along the Y-axis direction.

15. A relay as claimed in claim 14, wherein: The number of the movable contact groups (13) is at least two, each movable contact group (13) is arranged along the X-axis direction, and each static contact group (14) is arranged along the X-axis direction.

16. A relay as claimed in claim 15, wherein: The number of the movable contact groups (13) is three.

17. A relay as claimed in claim 14, wherein: The movable contact member group (13) includes at least two movable contacts (72), and each movable contact member (72) is arranged at intervals along the Z-axis direction.

18. A relay as claimed in claim 15, wherein: The push card (58) includes a receiving portion (64) and a connecting portion (65); the receiving portion (64) is used to receive the armature assembly (10) and is insert-molded with the armature assembly (10) as a whole; the connecting portion (65) is used to mount and carry the movable contact assembly (13); and the connecting portion (65) extends along the X-axis direction.

19. A relay as claimed in claim 18, wherein: In each longitudinal section of the push card (58) perpendicular to the Y-axis direction, the dimension of each 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 push card (58) along the X-axis direction.

20. A moving component according to claim 18, wherein: One side of the accommodating portion (64) along the Y-axis direction is connected to the middle position of the connecting portion (65) along the X-axis direction.

21. A moving component according to claim 14, wherein: The invention also includes a coil assembly (9), which is located on a side of the contact portion (5) away from the front surface of the accommodating member (2) along the Y-axis direction. The coil assembly (9) is provided with two magnetic drive ends (39), and the two magnetic drive ends (39) are used to drive the armature assembly (10) to move along the Y-axis direction.

22. A relay as claimed in claim 21, wherein: The armature assembly (10) includes a permanent magnet (42) and two armatures (43), the two armatures (43) are respectively fixed to the two magnetic poles of the permanent magnet (42), the two armatures (43) are respectively a first armature (48) and a second armature (49), the first armature (48) is provided with a first suction portion (51) and a second suction portion (52), and the second armature (49) is provided with a third suction portion (53) and a fourth suction portion (54); the armature assembly (10) moves along the Y-axis direction between a first position and a second position; in the first position, the first suction portion (51) and the third suction portion (53) are respectively suctioned or close to the two magnetic drive ends (39), and in the second position, the fourth suction portion (54) and the second suction portion (52) are respectively suctioned or close to the two magnetic drive ends (39).

23. A relay as claimed in claim 22, wherein: The coil assembly (9) includes a coil winding (32), the coil winding (32) extends along the X-axis direction, and the two magnetic drive ends (39) are arranged along the X-axis direction; the projections of the first armature (48) and the second armature (49) on a first projection plane (U) perpendicular to the Z-axis direction intersect with each other, and the intersecting parts (55) are arranged at intervals along the Z-axis direction.

24. A relay as claimed in claim 14, wherein: It also includes a guide member (6) extending along the Y-axis direction; one of the pushing card (58) and the accommodating member (2) is fixedly connected to the guide member (6), and the other one of the pushing card (58) and the accommodating member (2) is slidably matched with the guide member (6) along the Y-axis direction.

25. A relay as claimed in claim 24, wherein: The number of the guide members (6) is two, and the two guide members (6) are respectively located at the positions closest to the edges on both sides of the push card (58) along the X-axis direction.

26. A relay as claimed in claim 25, wherein: The accommodating member (2) is provided with a matching portion group (27) corresponding to the guide member (6), and each matching portion group (27) includes at least two matching portions (28), and each matching portion (28) in the same matching portion group (27) is arranged along the Y-axis direction; the position where the guide member (6) and the pushing card (58) are slidably matched or fixed is located between the two matching portions (28) of the corresponding matching portion group (27) along the Y-axis direction.

27. A relay as claimed in claim 26, wherein: Each of the mating parts (28) is provided with a mating groove extending along the Y-axis direction, the mating groove being used to mat with the guide member (6), a metal arc ring being attached to the groove wall of the mating groove; the guide member (6) is made of metal.

28. A relay as claimed in claim 14, wherein: The accommodating member (2) is provided with a first guide portion (26); the pushing card (58) is provided with a second guide portion (67) in the middle along the X-axis direction; the first guide portion (26) and the second guide portion (67) are slidably matched along the Y-axis direction.

29. A relay as claimed in claim 28, wherein: One of the first guide portion (26) and the second guide portion (67) 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 14, wherein: The accommodating component (2) is provided with an accommodating cavity (22), and the second magnetic conductive body group (16) is fixed in the accommodating cavity (22) and is covered by the cavity wall of the accommodating cavity (22).

31. A relay as claimed in claim 30, wherein: The accommodating component (2) is provided with a shell (18), the accommodating cavity (22) is opened at the bottom surface of the shell (18) along the Z-axis direction, and the upper surface of the shell (18) is provided with a dispensing hole (127) at a position corresponding to the accommodating cavity (22) along the Z-axis direction.

32. A relay as claimed in claim 14, wherein: The invention also includes an elastic bracket group (60), the number of the elastic bracket group (60) is the same as the number of the movable contact group (13) and corresponds one to one. The elastic bracket group (60) is installed on the push card (58). When the movable contact group (13) contacts the static contact group (14), the elastic bracket group (60) stores energy. When the movable contact group (13) moves away from the static contact group (14), the elastic bracket group (60) releases energy.

33. A relay as claimed in claim 14, wherein: The invention also includes an elastic member (7), which is installed on the accommodating member (2) and is suitable for elastically resisting the pushing card (58). The elastic member (7) stores energy when the movable contact member group (13) moves in a direction away from the static contact member group (14), and releases energy when the movable contact member group (13) moves in a direction close to the static contact member group (14).

34. A relay as claimed in claim 14, wherein: The invention also includes a micro switch (8), wherein the micro switch (8) is provided with a dynamic spring (113) and a fixed contact piece (112), and the push card (58) is provided with a pushing portion (66), wherein the pushing portion (66) is suitable for pushing or releasing the dynamic spring (113), so that the dynamic spring (113) contacts or moves away from the fixed contact piece (112).

35. An electric meter, wherein: Comprising a relay (1) as claimed in any one of claims 14 to 34.

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