Relay and ammeter

Abstract

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

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202420535964.5 (filed on March 19, 2024, and entitled "A Contacting Part, a Relay and an Electricity Meter"), the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of relays, in particular to a relay and an electricity meter. BACKGROUND

[0003] The contacting part in the prior art includes a moving contact group and a stationary contact group. The moving contact group can include one or more moving contacts, and the stationary contact group can include one or more stationary contacts. The moving contact group is adapted to abut or move away from the stationary contact group to control the on-off of an external circuit. The prior art already has an anti-short circuit unit, which includes a first magnet group fixed relative to the moving contact group and a second magnet group fixed relative to the stationary contact group. The first magnet group and the second magnet group are arranged along the movement direction of the moving contact group. When the moving contact group is subjected to a fault current, the current passing through the moving contact group forms a magnetic circuit between the first magnet group and the second magnet group, which generates a magnetic attraction force between the first magnet group and the second magnet group. The magnetic attraction force increases with the increase of the current value passing through the moving contact group. The anti-short circuit unit is mainly used to prevent the moving contact group and the stationary contact group from separating from each other due to the magnetic repulsion force formed by the pinch current between the contacts when the relay is subjected to a fault current. The separation of the moving contact group and the stationary contact group under the fault current will generate a destructive pull arc.

[0004] However, the existing contacting part still has the risk of separation of the moving contact group and the stationary contact group due to a fault current, thereby generating a destructive pull arc. SUMMARY

[0005] The present application aims to overcome the above-mentioned defects or problems in the background art and provide a relay and an electricity meter, which are less likely to separate the moving contact group and the stationary contact group under a fault current compared to the prior art.

[0006] To achieve the above-mentioned purpose, the following technical solutions are adopted:

[0007] The first technical solution relates to a relay, which comprises: an armature assembly moving along a Y-axis direction; a push card integrally formed with the armature assembly by insert injection molding; a static contact group provided with a reverse overcurrent part; a dynamic contact group corresponding to the static contact group in number, the dynamic contact group being arranged on the push card and carried by the push card to abut or move away from the static contact group along the Y-axis direction, the overcurrent direction of the dynamic contact group being opposite to the overcurrent direction of the reverse overcurrent part along an X-axis direction; and an anti-short circuit unit comprising a first magnet group fixed relative to the dynamic contact group and a second magnet group fixed relative to the static contact group, the first magnet group and the second magnet group forming a magnetic circuit when the dynamic contact group overflows, so that the first magnet group and the second magnet group form an attractive force along the Y-axis direction; and the second magnet group is at least partially located between the dynamic contact group and the reverse overcurrent part along the Y-axis direction.

[0008] The second technical solution is based on the first technical solution, wherein the static contact group comprises two static contacts arranged along the X-axis direction, and the reverse overcurrent part is formed in one of the two static contacts; the dynamic contact group comprises at least one dynamic contact adapted to abut or move away from the two static contacts and provided with an overcurrent bridge extending along the X-axis direction; and the second magnet group is at least partially located between the overcurrent bridge and the reverse overcurrent part.

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

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

[0011] The fifth technical solution is based on the second technical solution, wherein the dynamic contact group comprises at least two dynamic contacts, each dynamic contact being arranged along a Z-axis direction.

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

[0013] The seventh technical solution is based on the second technical solution, wherein the first magnet group comprises at least one first magnet provided with a body, the body being located on the back surface of the overcurrent bridge away from the static contact group.

[0014] The eighth technical solution is based on the seventh technical solution, wherein the first magnet is further provided with an extension part extending from the body along the Y-axis direction, the extension part being close to the second magnet group along the Y-axis direction when the dynamic contact group abuts the static contact group.

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

[0016] The tenth technical solution is based on the first technical solution, further comprising a coil assembly provided with two magnetic driving ends for driving the armature assembly to move in the Y-axis direction.

[0017] The eleventh technical solution is based on the second technical solution, wherein the push card comprises a containing part and a connecting part; the containing part is used for containing the armature assembly, and the connecting part is used for mounting and carrying the moving contact group.

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

[0019] The thirteenth technical solution is based on the twelfth technical solution, wherein in the X-axis direction, the containing part is located in the middle position relative to the connecting part; in each longitudinal section of the push card perpendicular to the Y-axis direction, the longitudinal section of the containing part has the smallest size in the X-axis direction among the sizes of each longitudinal section of the push card in the X-axis direction.

[0020] The fourteenth technical solution is based on the second technical solution, further comprising an elastic support group, the number of the elastic support group is the same as and corresponds to the number of the moving contact group, the elastic support group is mounted on the push card, the elastic support group stores energy when the moving contact group contacts the static contact group, and the elastic support group releases energy when the moving contact group is away from the static contact group.

[0021] The fifteenth technical solution is based on the fourteenth technical solution, wherein the elastic support group comprises an elastic support, the elastic support comprises a support body and an elastic support part which are connected as one body, the support body is fixed relative to the push card, the number of the elastic support part corresponds to the number of the moving contact in the corresponding moving contact group, and each moving contact in the moving contact group is mounted on the corresponding elastic support part.

[0022] The sixteenth technical solution is based on the fifteenth technical solution, wherein the elastic support part comprises two elastic arms, and the two elastic arms are fixedly connected with the overflow bridge.

[0023] The seventeenth technical solution is based on the sixteenth technical solution, wherein the moving contact is arranged with two moving contact points in the X-axis direction, and the positions at which the two elastic arms are fixedly connected with the overflow bridge are respectively located at the back surfaces of the corresponding moving contact points.

[0024] The eighteenth technical solution is based on the fifteenth technical solution, further comprising a limiting piece, the limiting piece is the same as the number of the moving contact group and corresponds to each other, the limiting piece is fixed relative to the push card, and when the corresponding moving contact group moves away from the static contact group, the limiting piece abuts against each moving contact along the Y-axis direction to limit the distance between each moving contact and the static contact group.

[0025] The nineteenth technical solution is based on the eighteenth technical solution, wherein the push card is provided with a limiting part, the bracket body is provided with an adaptive part, the limiting part and the adaptive part are slidingly matched along the Y-axis direction and limit the movement of the bracket body perpendicular to the Y-axis direction; the limiting piece limits the movement of the bracket body along the Y-axis direction by abutting against each moving contact.

[0026] The twentieth technical solution is based on the second technical solution, further comprising a containing piece, the containing piece contains the armature assembly, the pusher, the static contact group, the moving contact group and the anti-short circuit unit, and the static contact group is fixedly connected to the containing piece.

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

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

[0029] The twenty-third technical solution is based on the twenty-second technical solution, wherein the seventh overcurrent part is adapted to install a mutual inductor.

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

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

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

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

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

[0035] The twenty-ninth technical solution is based on the twenty-eighth technical solution, wherein one of the first guide part and the second guide part 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 being inserted into the guide groove and sliding along the Y-axis direction relative to the guide groove.

[0036] The thirtieth technical solution is based on the twentieth technical solution, further comprising a guide part extending along the Y-axis direction; one of the push card and the accommodating part is fixedly connected to the guide part, and the other is in sliding fit along the Y-axis direction with the guide part.

[0037] The thirty-first technical solution is based on the thirtieth technical solution, wherein the accommodating part is provided with a plurality of matching part groups corresponding to the guide part, each matching part group comprising at least two matching parts, and the matching parts in the same matching part group being arranged along the Y-axis direction; and the position of the guide part in sliding fit or fixed connection with the push card is located between two matching parts of a corresponding matching part group along the Y-axis direction.

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

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

[0040] The thirty-fourth technical solution is based on the twentieth technical solution, further comprising a micro switch provided with a moving spring and a fixed contact, the fixed contact being fixedly connected to the accommodating part, the push card being provided with a pushing part, and the moving spring being adapted to be pushed by the pushing part to deform to abut against the fixed contact and restore the deformation to move away from the fixed contact when the pushing part moves away.

[0041] The thirty-fifth technical solution is based on the twentieth technical solution, and it further includes an elastic element, which is installed in the receiving member. The elastic element stores energy when the moving contact group moves away from the stationary contact group and releases energy when the moving contact group moves towards the stationary contact group.

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

[0043] The thirty-seventh technical solution is based on the twentieth technical solution, and it further includes a partition. The receiving member has a number of contact cavities that are the same as and correspond to the number of moving contact groups. The contact cavities are used for the corresponding moving contact groups to abut against or move away from the stationary contact groups. The partition extends along the Y-axis direction. The partition is made of insulating material and is located between adjacent contact cavities.

[0044] The thirty-eighth technical solution is based on the thirty-seventh technical solution, wherein when the moving contact group abuts against the stationary contact group, the partition part isolates the adjacent contact cavity.

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

[0046] The fortieth technical solution relates to an electricity meter that includes a relay as described in any one of the first to thirty-ninth solutions.

[0047] Compared with existing technologies, the above solution has the following beneficial effects:

[0048] In the application, the push card and armature assembly insert are injection molded as a single piece, avoiding potential errors during the assembly of the armature assembly and the push card. This also results in higher integration between the push card and the armature assembly, fewer parts, and better utilization of limited space. Furthermore, it allows for better conversion of the armature assembly's movement along the Y-axis into the movement of the moving contact, avoiding losses in driving force and movement.

[0049] In this application, a push card is installed and supports each moving contact assembly. Therefore, when the moving contact assembly is arranged along the X-axis, jamming problems or reduced lifespan due to severe wear can be avoided.

[0050] In this application, in addition to the short-circuit protection unit in the prior art, a second magnetic conductor group is disposed between the moving contact group and the reverse current-carrying section. The current-carrying direction of the reverse current-carrying section is opposite to the current-carrying direction of the moving contact group along the X-axis. Therefore, the magnetic field generated by the reverse current-carrying section is in the same direction as the magnetic field lines on the side where the second magnetic conductor group is located, which strengthens the magnetic field strength of the second magnetic conductor group and makes the magnetic attraction between the second magnetic conductor group and the first magnetic conductor group stronger. Compared with the prior art, the moving contact group and the stationary contact group are less likely to separate under fault high current. It should be noted that the two moving contact groups and the stationary contact groups with opposite current directions are prone to magnetic repulsion under normal circumstances, so this is generally a design that needs to be avoided. However, since a second magnetic conductor group is disposed between the moving contact group and the stationary contact group, the magnetic repulsion caused by the opposite current direction is effectively weakened, which actually helps to increase the magnetic attraction. This is an important innovation of this application. Attached Figure Description

[0051] To more clearly illustrate the technical solutions of the embodiments, the accompanying drawings used are briefly described below:

[0052] Figure 1 This is an exploded perspective view of the relay in the embodiment;

[0053] Figure 2 This is an exploded perspective view of the housing in the embodiment;

[0054] Figure 3 This is a perspective view of the bottom shell in the embodiment;

[0055] Figure 4 This is a top view of the magnetic circuit portion in the embodiment;

[0056] Figure 5 This is an exploded perspective view of the coil assembly in the embodiment;

[0057] Figure 6 This is a perspective view of the armature assembly in the embodiment;

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

[0059] Figure 8 This is a top view of the armature assembly in the embodiment;

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

[0061] Figure 10 This is a schematic diagram of the magnetic circuit portion when the coil assembly first receives the first pulse electrical signal in the embodiment;

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

[0063] Figure 12 This is a schematic diagram of the magnetic circuit portion when the armature assembly is in the magnetic holding state in the second position, as shown in the embodiment.

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

[0065] Figure 14 This is a schematic diagram of the magnetic circuit portion when the armature assembly is driven to the first position by the coil assembly in an embodiment.

[0066] Figure 15 This is an exploded perspective view of the moving parts in the embodiment;

[0067] Figure 16 This is a top view of the pushing unit in the embodiment;

[0068] Figure 17 This is a left view of the pushing unit in the embodiment;

[0069] Figure 18 This is a perspective view of the pushing unit in the embodiment;

[0070] Figure 19 This is a perspective view of the moving touch unit in the embodiment;

[0071] Figure 20 This is a perspective view of the limiting component in the embodiment;

[0072] Figure 21 This is a top view of the moving parts in the embodiment;

[0073] Figure 22 This is a perspective view of the stationary contact assembly in the embodiment;

[0074] Figure 23 This is a schematic diagram of the contact portion in the embodiment;

[0075] Figure 24 This is a schematic diagram of the contact portion of the relay in the on state in the embodiment;

[0076] Figure 25 This is a schematic diagram showing the relay in the ON state in the embodiment;

[0077] Figure 26 for Figure 25 This is a sectional view along line AA;

[0078] Figure 27 for Figure 26 A magnified view of part B;

[0079] Figure 28 This is a schematic diagram of the relay being in the off state in the embodiment;

[0080] Figure 29 for Figure 28 Enlarged view of part C;

[0081] Figure 30 This is a perspective view of the elastic element and the guide element in the embodiment;

[0082] Figure 31 for Figure 25 DD section view;

[0083] Figure 32 This is a front view of the micro switch in the embodiment;

[0084] Figure 33 This is a perspective view of the relay and current transformer in the embodiment.

[0085] Explanation of key figure labels:

[0086] 1. Relay; 2. Receiving component; 3. Magnetic circuit part; 4. Pushing part; 5. Contact part; 6. Guide component; 7. Elastic component; 8. Micro switch; 9. Coil assembly; 10. Armature assembly; 11. Contact assembly; 12. Short-circuit protection unit; 13. Moving contact assembly; 14. Stationary contact assembly; 15. First magnetic conductor assembly; 16. Second magnetic conductor assembly; 17. Moving part; 18. Housing; 19. Cover; 20. Bottom shell; 21. Sealing component; 22. Receiving cavity; 23. Protrusion; 24. Coil receiving cavity; 25. Partition; 26. First guide part; 27. Mating part assembly; 28. Mating part; 29. ​​Contact cavity; 30. Partition; 31. Coil frame; 32. Coil winding; 33. Iron core; 34. Yoke; 35. Shielding component; 36. Signal input terminal; 37. First yoke; 38. Second yoke; 39. Magnetic drive end; 40. First magnetic drive end; 41. Second magnetic drive end; 42. Permanent magnet; 43. Armature; 44. First permanent magnet; 45. Second permanent magnet; 46. First magnetic pole; 47. Second magnetic pole; 48. First armature; 49. Second armature; 50. Attracting part; 51. First attracting part; 52. Second attracting part; 53. Third attracting part; 54. Fourth attracting part; 55. Intersecting parts; 56. Narrower section; 57. Wider section; 58. Pushing clip; 59. Connecting component; 60. Elastic support assembly; 61. Limiting component; 62. Pushing unit; 63. Movable contact unit; 64. Receiving part; 65. Connecting part; 66. Pushing part; 67. Second guide part; 68. Mounting hole; 69. Limiting part assembly; 70. Limiting part; 71. Snap-fit ​​part; 72. Moving contact; 73. Current 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 support part; 83. Adaptor part; 84. Elastic arm; 85. Abutting part; 86. Mounting part; 87. Clearance hole; 88. Snap-fit ​​hole; 89. Stationary contact; 90. Stationary contact; 91. Load terminal; 92. First stationary contact; 93. Second stationary contact; 94. First stationary contact; 95. First current-passing part; 96. Second current-passing part; 97. Third current-passing part; 98. Fourth current-carrying section; 99. First load terminal; 100. Second stationary contact; 101. Fifth current-carrying section; 102. Sixth current-carrying section; 103. Reverse current-carrying section; 104. Seventh current-carrying section; 105. Second load terminal; 106. Second magnetic conductor; 107. Insulator; 108. Fixing part; 109. First bending part; 110. Pushing surface; 111. Clearance groove; 112. Fixed contact; 113. Moving spring; 114. Signal output terminal; 115. Fixed connection part; 116. Second bending part; 117. Bridging part; 118. Current transformer; A1. First closed magnetic circuit; A2. Second closed magnetic circuit; B1. First pushing magnetic circuit; B2. Second pushing 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, Spacing; W, Symmetry plane; X, X-axis; Y, Y-axis; Z, Z-axis direction. Detailed Implementation

[0087] In the claims and the description other than the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to 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 into front and back, and the Z-axis direction into up and down.

[0088] Unless otherwise specified, the terms “first,” “second,” or “third,” etc., in the claims and description are used to distinguish different objects and not to describe a particular order.

[0089] Unless otherwise specified, in the claims and description, the terms “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “clockwise,” “counterclockwise,” etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the purpose of simplifying the description, and do not imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0090] Unless otherwise specified in the claims and description, the terms "fixed connection" or "fixed connection" shall be interpreted broadly to mean any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection, and fixed connection by other means or components.

[0091] In the claims and description, unless otherwise specified, the terms "comprising," "having," and variations thereof mean "including but not limited to."

[0092] In the claims and description, unless otherwise specified, the term "have" means that a technical feature that follows is part of a technical feature that precedes it.

[0093] Unless otherwise specified in the claims and description, the term "temporarily formed" means that the polarity of the magnetic drive end formed by the pulsed electrical signal disappears as the pulsed electrical signal disappears.

[0094] Unless otherwise specified in the claims and description, the term "reverse" means that when the current direction of the pulse electrical signal received by the coil assembly in this instance is different from that of the previously received pulse electrical signal, the polarity of the temporarily formed magnetic drive terminal is opposite to that of the previously temporarily formed magnetic drive terminal. Of course, those skilled in the art should understand that for a magnetic latching relay, if the current direction of the pulse electrical signal received by the coil assembly in this instance is the same as that of the previously received pulse electrical signal, then the currently received pulse electrical signal has no control significance, and the state of the relay will not change.

[0095] Unless otherwise specified in the claims and description, the term "magnetic cross section" refers to the cross section of an armature perpendicular to its magnetic path in a magnetic field.

[0096] In the claims and description, unless otherwise specified, the term "back side" means the side facing away from the stationary contact assembly.

[0097] Unless otherwise specified in the claims and description, the term "installed" means directly or indirectly connected to each other.

[0098] Unless otherwise specified in the claims and description, the term "bearing" means that the weight of one object will act on another object.

[0099] Unless otherwise specified in the claims and description, the term "directly connected" means that there are no other parts between the two and they are directly connected.

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

[0101] Example

[0102] Relay 1 is used to receive electrical signals to control the on / off state of an external circuit. Specifically, in this embodiment, relay 1 is a magnetic latching relay, which controls the on / off state of the external circuit by receiving pulse electrical signals. In this embodiment, the pulse electrical signals can be divided into a first pulse electrical signal and a second pulse electrical signal. The first pulse electrical signal is used to control the external circuit to conduct, and the second pulse electrical signal is used to control the external circuit to turn off. 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 a three-phase alternating current circuit. Relay 1 needs to control the on / off state of all three phases simultaneously.

[0103] See Figure 1 ,Figure 1 The structure of relay 1 in this embodiment is shown. For example... Figure 1 As shown, relay 1 includes a housing 2, a magnetic circuit 3, a pushing part 4, a contact part 5, a guide 6, an elastic element 7, and a micro switch 8.

[0104] The magnetic circuit section 3 includes a coil assembly 9 and an armature assembly 10. The contact section 5 includes contact groups 11 and short-circuit protection units 12. There is at least one contact group 11, and the number of short-circuit protection units 12 is the same as and corresponds to the number of contact groups 11. Each contact group 11 includes a moving contact group 13 and a stationary contact group 14. Each short-circuit protection unit 12 includes a first magnetic conductor group 15 and a second magnetic conductor group 16. Since this embodiment requires controlling the simultaneous on / off state of the three phases, the number of contact groups 11 is three. In this embodiment, the armature assembly 10, the pushing section 4, the moving contact group 13, and the first magnetic conductor group 15 constitute a moving component 17, which is the main component that moves relative to the accommodating member 2.

[0105] For ease of explanation, the following order of presentation is given in this embodiment: housing 2, magnetic circuit 3, moving part 17, stationary contact group 14, second magnetic conductor group 16, contact part 5, guide 6, elastic element 7, and micro switch 8. Finally, the working principle of relay 1 will be summarized.

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

[0107] like Figure 1 As shown, the housing 2 includes a housing 18 and a cover 19. In this embodiment, the housing 18 is used to house and mount the magnetic circuit component 3, the pushing part 4, the contact part 5, the guide 6, the elastic part 7, and the micro switch 8. In this embodiment, "mounting" means that they are directly or indirectly connected to each other.

[0108] See Figure 2 and Figure 3 , Figure 2 and Figure 3 The housing 18 in this embodiment is shown. (As shown...) Figure 2As shown, the housing 18 includes a bottom shell 20 and a sealing member 21. The bottom shell 20 has three accommodating cavities 22 at its front along the Y-axis direction, and these cavities are arranged along the X-axis direction. Each cavity 22 is used to accommodate the second magnetic conductor assembly 16. Each cavity 22 has an opening along the Z-axis direction, located on the bottom surface of the bottom shell 20 opposite to 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 19 along the Z-axis direction. 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.

[0109] like Figure 2 As shown, in this embodiment, the number of sealing members 21 and the accommodating cavities 22 are the same and correspond to each other. The sealing members 21 are fixed to the bottom shell 20 and are used to cover the opening of the corresponding accommodating cavity 22 so that the second magnetic conductor group 16 is fixed in the accommodating cavity 22.

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

[0111] like Figure 3 As shown, in this embodiment, the bottom shell 20 has a coil housing cavity 24 at its rear along the Y-axis. The coil housing cavity 24 is located in the middle of the bottom shell 20 along the X-axis. The coil housing cavity 24 opens upward along the Z-axis and is used to house the coil assembly 9. Several partitions 25 are provided on both sides of the coil housing cavity 24 along the X-axis. Some partitions 25 have heat dissipation holes on the bottom surface of the bottom shell 20. The heat dissipation holes are used to conduct the heat generated inside the housing 2 due to electrical conduction to the external environment. In this embodiment, most of the partitions 25 do not house other components. Therefore, the size of the coil housing cavity 24 can be increased along the X-axis as needed.

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

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

[0114] like Figure 3 As shown, in this embodiment, the bottom shell 20 is provided with contact cavities 29. The number of contact cavities 29 is the same as and corresponds to the number of contact member groups 11. 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, and the three contact cavities 29 are arranged along the X-axis direction. The contact cavities 29 are used to accommodate the contact member groups 11, and allow the moving contact member group 13 to abut against or move away from the stationary contact member group 14 along the Y-axis direction. A partition portion 30 is provided between two adjacent contact cavities 29. In this embodiment, there are two partition portions 30. The partition portions 30 generally extend along the Y-axis direction and have a certain size in the Z-axis direction to separate adjacent contact cavities 29. When the moving contact member group 13 abuts against the stationary contact member group 14, the partition portion 30 separates or even blocks the adjacent contact cavities 29. The partition 30 is used to prevent short circuits between adjacent stationary contact groups 14 from causing short circuits between two phases of the three-phase AC power supply. It also prevents arcing in some contact groups 11 from being conducted to other contact groups 11, causing short circuits between two phases. In this embodiment, the partition 30 is formed in the bottom shell 20 of the receiving member 2, and therefore, the partition 30 is naturally made of insulating material. In other embodiments, the partition 30 may be formed in the push card 58, or it may be fixed as a separate component to the receiving member 2 or the push card 58.

[0115] like Figure 1 As shown, in this embodiment, the bottom shell 20 has an opening that extends upward along the Z-axis. The cover 19 is used to cover the opening of the bottom shell 20 and is fixedly connected to the bottom shell 20. In this embodiment, the cover 19 is snapped into the bottom shell 20, and the cover 19 is also provided with a plurality of insertion posts, which are used to engage with the bottom shell 20 to position the cover 19.

[0116] The magnetic circuit section 3 is used to receive pulsed electrical signals, and drives the pushing section 4 to move linearly along the Y-axis according to the pulsed electrical signals, so as to change the state of the contact section 5. In this embodiment, the magnetic circuit section 3 is also used to keep the pushing section 4 and the contact section 5 in their current state after the pulsed electrical signals disappear, until a new pulsed electrical signal is received.

[0117] SeeFigure 4 , Figure 4 The magnetic circuit portion 3 in this embodiment is shown. For example... Figure 4 As shown, the magnetic circuit part 3 in this embodiment includes a coil assembly 9 and an armature assembly 10.

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

[0119] like Figure 5 As shown, the coil frame 31 is fixed to the bottom shell 20 and located in the coil housing cavity 24. The coil frame 31 extends along the X-axis and has a central hole extending along the X-axis. A retaining wall is provided at each end of the coil frame 31 along the X-axis.

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

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

[0122] like Figure 5 As shown, in this embodiment, there are two yokes 34, both made of magnetically conductive material. The two yokes 34 are a first yoke 37 and a second yoke 38. The two yokes 34 are fixed to both ends of the iron core 33, and the ends of the two yokes 34 furthest from the iron core 33 form magnetic drive ends 39. The two magnetic drive ends 39 are a first magnetic drive end 40 and a second magnetic drive end 41. 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, both yokes 34 are L-shaped, with the end of their longer arm fixed to the end of the iron core 33, and their shorter arms extending towards each other to form magnetic drive ends 39. The two magnetic drive ends 39 are arranged along the X-axis and extend along the X-axis to limit the movement of the armature assembly 10 along the Y-axis. Specifically, in this embodiment, the two magnetic drive ends 39 are used not only to limit the forward movement of the armature assembly 10 from the first position to the second position along the Y-axis direction, but also to limit the backward movement of the armature assembly 10 from the second position to the first position along the Y-axis direction.

[0123] like Figure 5As shown, the shield 35 is fixed relative to the coil frame 31 and is made of metal. In this embodiment, the shield 35 covers the other parts of the coil assembly 9 above the Z-axis and on both sides of the X-axis. The shield 35 is used to prevent the other parts of the coil assembly 9 from being easily disturbed by external magnetic fields, and also to prevent the magnetic fields of the other parts of the coil assembly 9 from easily interfering with the outside.

[0124] In this embodiment, the coil assembly 9 is excited by a pulse electrical signal to reverse the polarity temporarily formed by the two magnetic drive ends 39. "Temporarily formed" in this embodiment means that the polarity of the magnetic drive ends 39 formed by the pulse electrical signal disappears as the pulse electrical signal disappears. "Reversed" in this embodiment means that when the pulse electrical signal received by the coil assembly 9 this time has a different current direction than the pulse electrical signal received last time, the polarity of the temporarily formed magnetic drive ends 39 is opposite to that of the previously temporarily formed magnetic drive ends 39. In this embodiment, as previously described, 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 used to control the external circuit to be turned on, and the second pulse electrical signal is used to control the external circuit to be turned off. In this embodiment, the first pulse electrical signal and the second pulse electrical signal are electrical pulses with opposite current directions. In this embodiment, for ease of explanation, the coil winding 32 is set to form a first magnetic field excited by the first pulse electrical signal, and the first magnetic drive end 40 temporarily has a N pole polarity, while the second magnetic drive end 41 temporarily has a S pole polarity. After the first pulse signal disappears, the first magnetic drive terminal 40 and the second magnetic drive terminal 41 do not have the polarity generated by the first magnetic field. Instead, the coil winding 32 is excited by the second pulse signal to form a second magnetic field, causing the first magnetic drive terminal 40 to temporarily have an S pole polarity and the second magnetic drive terminal to temporarily have an N pole polarity. After the second pulse signal disappears, the first magnetic drive terminal 40 and the second magnetic drive terminal 41 do not have the polarity generated by the second magnetic field.

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

[0126] The armature assembly 10 is driven by the coil assembly 9 to move along the Y-axis. Its movement can be divided into two parts: movement from a rearward first position to a forward second position, and movement from a forward second position to a rearward first position. When the armature assembly 10 moves to the first position, the relay 1 is in the off state, and the electrical connection between the external three-phase AC power supply and the load is disconnected. When the armature assembly 10 moves to the second position, the relay 1 is in the on state, and the electrical connection between the external three-phase AC power supply and the load is connected.

[0127] See Figure 6 to Figure 8 , Figure 6 to Figure 8 The armature assembly 10 in this embodiment is shown. For example... Figure 6 As shown, in this embodiment, the armature assembly 10 includes two permanent magnets 42 and two armatures 43.

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

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

[0130] like Figure 6 and Figure 7 As shown, each armature has a narrower segment 56 and a wider segment 57. The width of the narrower segment 56 along the Z-axis is smaller than the width of the wider segment 57 along the Z-axis. In this embodiment, there are two wider segments 57, which are located on opposite sides of the narrower segment 56 along the X-axis. The portions 55 where each armature 43 intersects are located in the narrower segment, forming a gap V between the portions 55 where the two armatures 43 intersect. In each armature 43, the positions where it is fixed to the two permanent magnets 42 are located on opposite sides of the intersecting portions 55 along the X-axis and are both located in the wider segment 57.

[0131] like Figure 8 As shown, in this embodiment, the armature assembly 10 extends entirely along the X-axis direction, and its dimension in the X-axis direction is larger 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 the symmetry plane W perpendicular to the X-axis direction.

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

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

[0134] Figure 9 The state of the magnetic circuit portion 3 is shown when the armature assembly 10 in the first position is in the magnetic holding state in this embodiment. For example... Figure 9 As shown, when the armature assembly 10 is in the magnetic holding state in the first position, the first engaging part 51 engages the first magnetic drive end 40, and the third engaging part 53 engages the second magnetic drive end 41. At this time, the magnetic circuit part 3 forms two closed magnetic loops, namely the first closed magnetic loop A1 and the second closed magnetic loop A2. The first closed magnetic loop A1 starts from the first magnetic pole 46 of the first permanent magnet 44, passes through the first engaging part 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 engaging part 53, the part 55 where the second armature 49 intersects with each other, and the second magnetic pole 47 of the first permanent magnet 44, and returns to the first magnetic pole 46 of the first permanent magnet 44, without any air gap in between, and passes through the entire coil assembly 9. The second closed magnetic circuit A2 extends from the first magnetic pole 46 of the second permanent magnet 45, through the intersecting portions 55 of the first armature 48, the first engaging 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 engaging portion 53, and the second magnetic pole 47 of the second permanent magnet 45 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 is generated between the first engaging portion 51 and the first magnetic drive end 40, and between the third engaging portion 53 and the second magnetic drive end 41, so that the armature assembly 10 is held in the first position relative to the coil assembly 9.

[0135] Figure 10The diagram illustrates the state of the magnetic circuit portion 3 when the coil assembly 9 in this embodiment receives 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, causing the first magnetic drive end 40 to temporarily have an N pole polarity and the second magnetic drive end 41 to temporarily have an S pole polarity. Since the first magnetic drive end 40 and the first attraction part 51 have the same polarity (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 (S pole), the second magnetic drive end 41 generates a magnetic repulsion force on the third attraction part 53. Furthermore, the magnetic circuit portion 3 also forms two driving magnetic circuits at this time, namely the first driving magnetic circuit B1 and the second driving magnetic circuit B2. The first driving magnetic circuit B1 starts from the first magnetic drive end 40, passes 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 part 55 where the first armature 48 intersects with each other, the second attraction part 52, the first air gap P, the second magnetic drive end 41, the second yoke 38, the iron core 33, and the first yoke 37, and returns to the first magnetic drive end 40. There are only two first air gaps P that must exist as stroke gaps in between, and it passes through the entire coil assembly 9. The second driving magnetic circuit B2 originates from the first magnetic drive end 40, passes through the first air gap P, the fourth attraction part 54, the part 55 where the second armature 49 intersects, 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, and the first yoke 37, and returns to the first magnetic drive end 40. There are only two first air gaps P that must exist as stroke gaps in between, and it passes through the entire coil assembly 9. Therefore, when the coil assembly 9 receives the first pulse electrical signal, not only does the first magnetic drive end 40 exert a magnetic repulsion force on the first attraction part 51, and the second magnetic drive end 41 exert a magnetic repulsion force on the third attraction part 53, but also, due to the existence of the first driving magnetic circuit B1 and the second driving 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 to the second position along the Y-axis direction.

[0136] Figure 11 This illustration shows the state of the magnetic circuit portion 3 when the armature assembly 10 is driven to the second position by the coil assembly 9 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. For example...Figure 11 As shown, 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 part 3 forms two closed magnetic loops, namely the third closed magnetic loop A3 and the fourth closed magnetic loop A4. The third closed magnetic loop A3 starts from the first magnetic drive end 40, passes through the fourth 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 part 55 where the first armature 48 intersects with each other, the second attraction part 52, the second magnetic drive end 41, the second yoke 38, the iron core 34, and the first yoke 37, and returns to the first magnetic drive end 40. There is no air gap in between, and it passes through the entire coil assembly 9. The fourth closed magnetic circuit A4 originates from the first magnetic drive end 40, passes through the fourth attraction part 54, the intersecting portion 55 of the second armature 45, the second magnetic pole 47 of the second permanent magnet 45, the first magnetic pole 46 of the second permanent magnet 45, the second attraction part 52, the second magnetic drive end 41, the second yoke 38, the iron core 34, and the first yoke 37, and returns to the first magnetic drive end 40 without any air gaps, passing through the entire coil assembly 9. Therefore, when the armature assembly 10 has just moved to the second position, due to the presence of the third closed magnetic circuit A3 and the fourth closed magnetic circuit A4, and the superposition effect between them, a greater magnetic attraction 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.

[0137] Figure 12 The state of the magnetic circuit portion 3 is shown when the armature assembly 10 in the second position is in the magnetic holding state in this embodiment. For example... Figure 12 As shown, when the first pulse 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 time, the aforementioned third closed magnetic circuit A3 and 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, and its path is similar to... Figure 11 The path of the third closed magnetic circuit A3 shown is the same; the fourth closed magnetic circuit A4 can be considered to start from the first magnetic pole 46 of the second permanent magnet 45, and its path is the same as... Figure 11 The path of the fourth closed magnetic circuit A4 shown is the same. The third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 are superimposed on each other, so that a greater magnetic attraction is generated between the fourth attraction part 54 and the first magnetic drive end 40 and between the second attraction part 52 and the second magnetic drive end 41, and the armature assembly 10 is held in the second position relative to the coil assembly 9.

[0138] Figure 13 This illustration shows the state of the magnetic circuit section 3 when the coil assembly 9 in this embodiment has just received the second pulse electrical signal. (As shown...) Figure 13As shown, at this time, the coil winding 32 is excited by the second pulse electrical signal to generate a second magnetic field, causing the first magnetic drive end 40 to temporarily have an S pole polarity and the second magnetic drive end 41 to temporarily have an N pole polarity. Since the first magnetic drive end 40 and the fourth attraction part 54 have the same polarity, both being 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, both being N poles, the second magnetic drive end 41 generates a magnetic repulsion force on the second attraction part 52. Furthermore, the magnetic circuit section 3 also forms two driving magnetic circuits at this time, namely the third driving magnetic circuit B3 and the fourth driving magnetic circuit B4. The third driving magnetic circuit B3 starts from the second magnetic drive end 41, passes through the second air gap Q, the third attraction part 53, the part 55 where the second armature 45 intersects with each other, 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, and returns to the second magnetic drive end 41. There are only two second air gaps Q that must exist as stroke gaps in between, and it passes through the entire coil assembly 9. The fourth driving magnetic circuit B4 travels 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 part 55 where the first armature 48 intersects, 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 that are necessary as travel gaps in the middle, and it passes through the entire coil assembly 9. Therefore, when the coil assembly 9 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 exert 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 push circuit B4, and the 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 pushing force F2 on the armature assembly 10, pushing the armature assembly 10 from the second position to the first position along the Y-axis direction.

[0139] Figure 14 This illustration shows the state of the magnetic circuit portion 3 when the armature assembly 10 is driven to the first position by the coil assembly 9 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 attracting portion 51 along the Y-axis from the second position to the first position, causing the first attracting portion 51 to attract the first magnetic drive end 40; the second magnetic drive end 41 limits the movement of the third attracting portion 53 along the Y-axis from the second position to the first position, causing the third attracting portion 53 to attract the second magnetic drive end 41. For example... Figure 14As shown, when the armature assembly 10 has just moved 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 S pole polarity. At this time, the magnetic circuit part 3 still has the aforementioned first closed magnetic circuit A1 and second closed magnetic circuit A2, wherein the first closed magnetic circuit A1 can be regarded as starting from the second magnetic drive end 41, and its path is similar to... Figure 9 The path of the first closed magnetic circuit A1 shown is the same; 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... Figure 9 The path of the second closed magnetic circuit A2 shown is the same. 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 part 51, and between the second magnetic drive end 41 and the third attraction part 53.

[0140] When the second pulse electrical signal disappears, the second magnetic field disappears, and the first magnetic drive end 40 and the second magnetic drive end 41 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 10... Figure 9 As shown, it is in a magnetically held state in the first position.

[0141] The above process fully describes the working principle of the magnetic circuit part 3 in this embodiment. As can be seen from the above description, regardless of whether the magnetic circuit part 3 is in the magnetic holding state or the magnetic driving state, a first part of the magnetic circuit without air gap can be formed between the two attraction parts 50 of the armature assembly 10, and a second part of the magnetic circuit passing through the entire coil assembly 9 can be formed between the two magnetic driving ends 39 of the coil assembly 9. The first part and the second part can form a complete magnetic circuit in both the magnetic holding state and the magnetic driving state, so that the coil assembly 9 in this embodiment drives the armature assembly 10 to move linearly along the Y-axis direction according to the pulse electrical signal, and after the pulse electrical signal disappears, the armature assembly 10 remains in the current state until a new pulse electrical signal is received.

[0142] In this embodiment, the moving part 17 is the main part of the relay 1 that moves relative to the housing 2. See also Figure 15 , Figure 15 The moving part 17 in this embodiment is shown. For example... Figure 15As shown, in this embodiment, the moving component 17 includes an armature assembly 10, a pushing portion 4, a moving contact assembly 13, and a first magnetic conductor assembly 15. The pushing portion 4 includes a pushing clip 58, a connecting member 59, an elastic support assembly 60, and a limiting member 61. The armature assembly 10, the pushing clip 58, and the connecting member 59 form a pushing unit 62, and the moving contact assembly 13, the first magnetic conductor assembly 15, and the elastic support assembly 60 form a moving contact unit 63. The pushing unit 62 drives the moving contact unit 63 to move linearly along the Y-axis, and the moving 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 in the order of the pushing unit 62, the moving contact unit 63, and the limiting member 61.

[0143] See Figure 16 to Figure 18 , Figure 16 to Figure 18 The pushing unit 62 in this embodiment is shown. As described above, the pushing unit 62 includes an armature assembly 10, a pushing clip 58, and a connector 59. The armature assembly 10 has been described in detail previously. The pushing clip 58 and the connector 59 will be described in detail below.

[0144] The pusher 58 is driven by the armature assembly 10 and is used to mount and support the moving contact unit 62. In this embodiment, "supporting" refers to the force of gravity acting on one object to another. For example... Figure 16 As shown, the push card 58 is fixedly connected to the armature assembly 10. In this embodiment, the push card 58, the armature assembly 10, and the connector 59 are integrally injection molded. 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 connector 59 and mounting and supporting the moving contact unit 62. It should be noted that dividing the push card 58 into a receiving portion 64 and a connecting portion 65 is only for the convenience of description; the two are actually integrated.

[0145] like Figure 16 As shown, when the armature assembly 10 is housed in the receiving portion 64, the armature assembly 10, except for the four attracting portions 50, is entirely enclosed in the receiving portion 64. Since the dimension of the armature assembly 10 along the X-axis is larger than its dimension along the Y-axis, the dimension of the receiving portion 64 along the X-axis is also larger than its dimension along the Y-axis. In this embodiment, all four attracting portions 50 extend from the receiving portion 64 along the X-axis and are used to interact with the two magnetic drive ends 39. Specifically, the first attracting portion 51 and the fourth attracting portion 54 extend from the left side of the receiving portion 64 along the X-axis, with the first attracting portion 51 located at the front along the Y-axis and the fourth attracting portion 54 located at the rear along the Y-axis; the third attracting portion 53 and the second attracting portion 52 extend from the right side of the receiving portion 64 along the X-axis, with the third attracting portion 53 located at the front along the Y-axis and the second attracting portion 52 located at the rear along the Y-axis.

[0146] like Figure 16As shown, the connecting portion 65 extends along the X-axis. Along the X-axis, the receiving portion 64 is positioned in the middle relative to the connecting portion 65. A pushing portion 66 is provided on the right side of the connecting portion 65, away from the back side of the stationary contact assembly 14, along the X-axis. Here, "back side" refers to the orientation of this surface away from the stationary contact assembly 14. The pushing portion 66 extends from front to back along the Y-axis and is adapted to act on the micro switch 8, enabling the micro switch 8 to sense the state of the relay 1. Specifically, when the armature assembly 10 is in the first position, the pushing portion 66 abuts against the micro switch 8; when the armature assembly 10 is in the second position, the pushing portion 66 moves away from the micro switch 8.

[0147] like Figure 17 As shown, the bottom surface of the push card 58 has a second guide portion 67 at its midpoint along the X-axis and Y-axis directions. The second guide portion 67 slides with the first guide portion 26 along the Y-axis direction. In this embodiment, the first guide portion 26 is a guide groove extending along the Y-axis direction, and therefore the second guide portion 67 is a guide protrusion extending along the Z-axis direction. The guide protrusion is inserted into the guide groove and slides relative to the guide groove along the Y-axis direction, so that the first guide portion 26 can guide the linear movement of the push card 58 along the Y-axis direction. 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. Any sliding fit structure well known to those skilled in the art can also be used to guide the push card 58 with the first guide portion 26.

[0148] like Figure 18 As shown, the connecting portion 65 has mounting holes 68 on both sides along the X-axis, which are used to mate with the guide member 6. In this embodiment, the mounting holes 68 are located at the edge of the connecting portion 65 along the X-axis to make the guiding effect of the guide member 6 more obvious.

[0149] like Figure 18 As shown, in this embodiment, between the two mounting holes 68, three limiting part groups 69 are provided on the connecting surface of the connecting part 65 facing the stationary contact group 14. The number of limiting part groups 69 is the same as that of the moving contact group 13 and they correspond to each other. The three limiting part groups 69 are generally symmetrically arranged along the X-axis direction and face the corresponding contact cavity 29. Each limiting part group 69 has two limiting parts 70. The two limiting parts 70 are arranged along the Z-axis direction. In this embodiment, the limiting parts 70 are connecting posts protruding from the connecting surface.

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

[0151] like Figure 18 As shown above, the connector 59 and the push card 58 insert are integrally injection molded. In this embodiment, the number of connectors 59 and the number of moving contact group 13 are the same and correspond to each other. The connector 59 is used to connect with the corresponding limiting member 61 so that the limiting member 61 is fixed relative to the push card 58. In this embodiment, there are three connectors 59 arranged along the X-axis. The position of each connector 59 along the Y-axis is the same as the position of the corresponding limiting part group 69 along the Y-axis. In this embodiment, the connector 59 extends along the Z-axis, and its two ends protrude from the push card 58 to form two locking parts 71. The locking parts 71 are used to connect the limiting member 61.

[0152] See Figure 19 , Figure 19 The movable contact unit 63 in this embodiment is shown. The number of movable contact units 63 is the same as and corresponds to the number of movable contact groups 13. 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 group 13, a first magnetic conductive component 15, and an elastic support group 60.

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

[0154] like Figure 19As shown, the moving contact group 13 includes at least one moving contact 72. In this embodiment, the moving contact group 13 includes two or more moving contacts 72, specifically two, with each moving contact 72 spaced apart along the Z-axis. The moving contacts 72 are used to contact or move away from the stationary contact group 14. Each moving contact 72 includes a current-carrying bridge 73 fixed to each other and two moving contacts 74. The current-carrying bridge 73 is made of a highly conductive metal and extends along the X-axis. Both moving contacts 74 are made of a highly conductive metal and are arranged along the X-axis. The two moving contacts 74 are located on opposite sides of the front of the current-carrying bridge 73 facing the stationary contact group 14 along the X-axis. The two moving contacts 74 are 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, and the second moving contact 76 is located on the right side along the X-axis. When the moving contact group 13 contacts the stationary contact group 14, current flows from one of the moving contacts 74 through the current bridge 73 to the other moving contact 74. For ease of explanation, the current is set to flow from the first moving contact 75 through the current bridge 73 to the second moving contact 76. Those skilled in the art will understand that since the relay 1 in this embodiment is used to control the switching on and off of AC power, this setting is merely for ease of explanation.

[0155] like Figure 19 As shown, the first magnetic conductor group 15 includes at least one first magnetic conductor 77. The number of first magnetic conductors 77 may be the same as and correspond to the number of moving contacts 72 in the corresponding moving contact group 13, or they may be different and not correspond. In this embodiment, the number of first magnetic conductors 77 is the same as and corresponds to the number of moving contacts 72 in the corresponding moving contact group 13. In the first magnetic conductor group 15, there are two first magnetic conductors 77, and each first magnetic conductor 77 is spaced apart along the Z-axis. In this embodiment, the first magnetic conductor 77 is fixedly connected to the corresponding moving contact 72. The first magnetic conductor 77 has a body 78 and two extensions 79. The body 78 extends along the Z-axis and is located on the back side of the flow guide bridge 73. In this embodiment, the body 78 is attached to the back side of the flow guide bridge 73. Two extensions 79 extend from both ends of the body 77 along the Z-axis toward the stationary contact group 14 along the Y-axis, and cross the current bridge 73 and even the moving contact 74 along the Y-axis, so that when the moving contact group 13 abuts against the stationary contact group 14, the extensions 79 are close to the second magnetic conductor group 16. In other embodiments, the first magnetic conductor 77 does not necessarily have the shape of this embodiment; it may only have a body 78 or only one extension 79. This is as long as the first magnetic conductor 77 can form a magnetic circuit with the second magnetic conductor group 79.

[0156] like Figure 19As shown, the elastic support group 60 is installed on the push card 58. The elastic support group 60 stores energy when the moving contact group 13 abuts against the stationary contact group 14 along the Y-axis direction, and releases energy when the moving contact group 13 moves away from the stationary contact group 14 along the Y-axis direction. The elastic support group 60 includes at least one elastic support 80. The number of elastic supports 80 may be the same as and correspond to the number of moving contacts 72 in the corresponding moving contact group 13, or they may be different and not correspond. In this embodiment, there is one elastic support 80. The elastic support 80 is provided with a support body 81 and at least one elastic support part 82 that are connected to each other. The support body 81 is fixed relative to the push card 58 and is provided with an adapter part 83. The number of adapter parts 83 is the same as and corresponds to the number of limiting parts 70 in the corresponding limiting part group 69. In this embodiment, there are two adapter parts 83 and they are arranged along the Z-axis direction. The limiting part 70 and the adapter part 83 slide in cooperation along the Y-axis direction to restrict the movement of the support body 81 perpendicular to the Y-axis direction. In this embodiment, the limiting part 70 is a connecting post protruding from the connecting surface, and the adapter part 83 is a connecting hole. The two connecting posts are inserted into the two connecting holes, so that the elastic bracket 80 has no degree of freedom in any direction except along the Y-axis. In this embodiment, the number of elastic support parts 82 of each elastic bracket 80 is the same as and corresponds to the number of moving contacts 72 in the corresponding moving contact group 13. Of course, the number can be different and not correspond. In this embodiment, there are two elastic support parts 82, which are arranged along the Z-axis. Each moving contact 72 is mounted on the corresponding elastic support part 82. In this embodiment, each elastic support part 82 includes two elastic arms 84. The two elastic arms 84 extend from both sides of the bracket body 81 along the X-axis and at least partially tilt away from the push card 85 along the Y-axis. The free ends of the two elastic arms 84 are fixed to the back of the flow bridge 73, and the fixed positions with the flow bridge 73 are located on the back of the first moving contact 75 and the second moving contact 76 along the Y-axis. The elastic support 82 can also adopt other structures, as long as it can store energy when the moving contact group 13 contacts the stationary contact group 14 and release energy when the moving contact group 13 moves away from the stationary contact group 14.

[0157] See Figure 20 , Figure 20The limiting member 61 in this embodiment is shown. The number of limiting members 61 is the same as and corresponds to the number of moving contact groups 13. In this embodiment, there are three limiting members 61, each arranged along the X-axis. The limiting member 61 is fixed relative to the push card 58 and is used to abut against each moving contact 72 along the Y-axis when the corresponding moving contact group 13 moves away from the stationary contact group 14, thereby limiting the distance between each moving contact 72 and the stationary contact group 14. The limiting member 61 includes an abutment portion 85 and two mounting portions 86. The abutment portion 85 extends along the Z-axis. When the moving contact group 13 moves away from the stationary contact group 14, the current bridge 73 abuts against the abutment portion 85 along the Y-axis under the action of the elastic support 80. The abutment portion 85 is provided with clearance holes 87 suitable for the extensions 79 of the two first magnetic conductors 77 to extend along the Y-axis. In this embodiment, there are three clearance holes 87 arranged along the Z-axis. Two mounting portions 86 extend from both ends of the abutment portion 85 along the Z-axis direction and away from the stationary contact assembly 14 along the Y-axis direction. Each mounting portion 86 is provided with a snap-fit ​​hole 88, which is used to engage with the corresponding snap-fit ​​portion 71 on the corresponding connector 59 so that the limiting member 61 pushes the snap-fit ​​58 to be fixed.

[0158] See Figure 21 , Figure 21 The moving part 17 in this embodiment is shown. For example... Figure 21 As shown, after the moving part 17 is assembled, there is one armature assembly 10 and one pusher 58, and three limit part groups 70, connecting parts 59, elastic support groups 60, limit parts 61, moving contact groups 13, and first magnetic conductor groups 15. Each first magnetic conductor 77 in the first magnetic conductor group 15 is fixed to its corresponding moving contact 72, and each moving contact 72 is fixed to its corresponding elastic support part 82. The elastic support 80 slides on each limit part 70 of the corresponding limit part group 69. The limit part 61 engages with the connecting part 59, and the abutment part 85 abuts against the flow bridge 73 of each moving contact 72 along the Y-axis direction to limit the distance between each moving contact 72 and the stationary contact group 14. It also limits the support body 81 along the Y-axis direction, fixing the support body 81 relative to the pusher 58.

[0159] See Figure 22 , Figure 22 The stationary contact assembly 14 of this embodiment is shown. The stationary contact assembly 14 is fixed to the base shell 20. Figure 22 As shown, in this embodiment, the number of stationary contact groups 14 and moving contact groups 13 are the same and correspond to each other. In this embodiment, there are three stationary contact groups 14 arranged along the X-axis. The stationary contact group 14 is used to connect one phase of a three-phase AC power supply. The stationary contact group 14 includes two stationary contacts 89, each of which is provided with a stationary contact 90 and a load terminal 91. The two stationary contacts 89 are respectively a first stationary contact 92 and a second stationary contact 93. The first stationary contact 92 and the second stationary contact 93 are arranged along the X-axis.

[0160] like Figure 22 As shown, in this embodiment, the first stationary contact 92 is provided with a first stationary contact 94, a first flow passage 95, a second flow passage 96, a third flow passage 97, and a fourth flow passage 98. The number of first stationary contacts 94 is the same as and corresponds to the number of first moving contacts 75 in the corresponding moving contact group 13. In this embodiment, there are two first stationary contacts 94, which are arranged along the Z-axis direction. The first stationary contacts 94 are adapted to contact or move away from the corresponding first moving contacts 75 along the Y-axis direction. Each first stationary contact 94 is fixed to the first flow passage 95, which extends along the Z-axis direction and is perpendicular to the Y-axis direction. The second flow passage 96 extends from the upper left side of the first flow passage 95 along the X-axis direction away from the moving contact group 13 along the Y-axis direction. The second flow passage 96 penetrates the bottom shell 20 along the Y-axis direction and extends out of the front surface of the bottom shell 20. The second flow passage 96 is perpendicular to the X-axis direction. The third current-carrying portion 97 extends to the left along the X-axis from the end of the second current-carrying portion 96 away from the first current-carrying portion 95 along the Y-axis. The third current-carrying portion 97 is perpendicular to the Y-axis. The fourth current-carrying portion 98 extends from the bottom end of the third current-carrying portion 97 along the Z-axis away from the first current-carrying portion 95 along the Y-axis. The fourth current-carrying portion 98 is perpendicular to the Z-axis. In this embodiment, the fourth current-carrying portion 98 forms a first load terminal 99. The first load terminal 99 is used to connect one phase of an external power supply or load. For ease of explanation, the first load terminal 99 is assumed to be connected to an external power supply.

[0161] like Figure 22As shown, in this embodiment, the second stationary contact 93 is provided with a second stationary contact 100, a fifth flow-through portion 101, a sixth flow-through portion 102, a reverse flow-through portion 103, and a seventh flow-through portion 104. The number of second stationary contacts 100 is the same as and corresponds to the number of second moving contacts 76 in the corresponding moving contact group 13. In this embodiment, there are two second stationary contacts 100 arranged along the Z-axis direction. The second stationary contacts 100 are adapted to contact or move away from the corresponding second moving contacts 76 along the Y-axis direction. In this embodiment, the first stationary contact 94 and the second stationary contact 100 are arranged along the X-axis direction. Each second stationary contact 76 is fixed to the fifth flow-through portion 101, which extends along the Z-axis direction and is perpendicular to the Y-axis direction. The sixth flow-through portion 102 extends from the upper left side of the fifth flow-through portion 101 along the X-axis direction and is perpendicular to the X-axis direction. A reverse current-carrying section 103 extends to the left along the X-axis from the end of the sixth current-carrying section 102 away from the fifth current-carrying section 101 along the Y-axis direction, and the reverse current-carrying section 103 is perpendicular to the Y-axis direction. A seventh current-carrying section 104 extends from the bottom end of the reverse current-carrying section 103 along the Z-axis direction away from the fifth current-carrying section 101 along the Y-axis direction. The seventh current-carrying section 104 penetrates the bottom shell 20 and extends out of the front surface of the bottom shell 20. The seventh current-carrying section 104 is perpendicular to the Z-axis direction. The end of the seventh current-carrying section 104 away from the fifth current-carrying section 101 forms a second load terminal 105. The second load terminal 105 is used to connect an external load or one phase of the power supply. For ease of description, the second load terminal 105 is provided to be connected to an external load.

[0162] See Figure 2 and Figure 27 , Figure 2 and Figure 27 The second magnetic conductor assembly 16 in this embodiment is shown. For example... Figure 2 As shown, the number of second magnetic conductor groups 16 is the same as and corresponds to the number of first magnetic conductor groups 15. The second magnetic conductor groups 16 and the first magnetic conductor groups 15 are arranged opposite each other along the Y-axis. In this embodiment, the number of second magnetic conductor groups 16 is three, arranged along the X-axis. Each second magnetic conductor group 16 includes at least one second magnetic conductor 106. The number of second magnetic conductors 106 and the corresponding number of first magnetic conductors 77 in the first magnetic conductor group 15 can be the same and correspond, or they can be different and not correspond. 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 in a flat plate shape. As previously described, the second magnetic conductor 106 is housed in the receiving cavity 22 and fixed relative to the housing 18. Like the first magnetic conductor 77, the second magnetic conductor 106 can also be L-shaped or C-shaped, as long as the first magnetic conductor group 15 and the second magnetic conductor group 16 can form a magnetic circuit. Figure 27 As shown, in this embodiment, the second magnetic conductor 106 is covered by an insulator 107. In this embodiment, the insulator 107 is formed in the housing 18.

[0163] See Figure 23 to Figure 27 , Figure 23 to Figure 27 The contact portion 5 in this embodiment is shown. As previously described, in this embodiment, the contact portion 5 includes contact group 11 and short-circuit protection unit 12. The number of contact group 11 and short-circuit protection unit 12 are the same and correspond to each other. In this embodiment, the number of contact group 11 is three. Each contact group 11 includes a moving contact group 13 and a stationary contact group 14. Each short-circuit protection unit 12 includes a first magnetic conductor group 15 and a second magnetic conductor group 16.

[0164] like Figure 23 As shown, in this embodiment, within the same contact group 11, the moving contact group 13 is adapted to contact or move away from the stationary contact group 14 along the Y-axis direction. As previously described, when the armature assembly 10 is in the first position, the moving contact group 13 moves away from the stationary contact group 14 along the Y-axis direction, the relay 1 is in the off state, and the electrical connection of the external circuit is disconnected; when the armature assembly 10 is in the second position, the moving contact group 13 contacts the stationary contact group 14 along the Y-axis direction, the relay 1 is in the on state, and the electrical connection of the external circuit is on. Specifically, each first moving contact 75 in the moving contact group 13 is adapted to contact or move away from each first stationary contact 94 in the stationary contact group 14 along the Y-axis direction, and each second moving contact 76 in the moving contact group 13 is adapted to contact or move away from each second stationary contact 100 in the stationary contact group 14 along the Y-axis direction.

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

[0166] like Figure 24As shown, when the moving contact group 13 abuts against the stationary contact group 14, the electrical connection between the power supply and the load is established. At this time, the current flow K is 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 stationary contact 94, the first moving contact 75, the overcurrent bridge 73, the second moving contact 76, the second stationary 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 time, the current passing through the overcurrent bridge 73 flows to the right along the X-axis, and the current passing through the reverse overcurrent section 103 flows to the left along the X-axis; the current directions are opposite. According to the right-hand screw theorem, the current passing through the overcurrent bridge 73 forms the third magnetic field L, and the current passing through the reverse overcurrent section 103 forms the fourth magnetic field M.

[0167] like Figure 25 to Figure 27 As shown, in the third magnetic field L formed by the current-carrying bridge 73, the two first magnetic conductors 77 and the second magnetic conductor 106 are magnetized and form two magnetic loops. In the body 78 of the first magnetic conductor 77, the magnetic field lines of the magnetic loop are directed from bottom to top along the Z-axis. In the upper extension 79 of the first magnetic conductor 77 along the Z-axis, the magnetic field lines of the magnetic loop are directed from back to front along the Y-axis. In the second magnetic conductor 106, the magnetic field lines of the magnetic loop are directed from top to bottom along the Z-axis. In the lower extension 79 of the first magnetic conductor 77 along the Z-axis, the magnetic field lines of the magnetic loop are directed from front to back along the Y-axis. The magnetic loops formed by the third magnetic field L create 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 them. The fourth magnetic field M formed by the reverse current section 103 affects the second magnetic conductor 106. The direction of the magnetic field 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, which is the same as the direction of the magnetic field lines of the magnetic circuit in the second magnetic conductor 106. Therefore, the attraction between the first magnetic conductor 77 and the second magnetic conductor 106 is stronger.

[0168] See Figure 28 and Figure 29 , Figure 28 and Figure 29 Guide 6 is shown in this embodiment. Guide 6 is used to guide the linear movement of the push card 58 along the Y-axis. Figure 29As shown, 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, and the other is slidably engaged with the guide member 6 along the Y-axis. In this embodiment, the push card 58 is fixedly connected to the guide member 6, and the housing 18 is slidably engaged 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 is the same as the number of mating parts 27 and they correspond to each other. There are two guide members 6, which are arranged along the X-axis. The guide member 6 passes through the corresponding mounting hole 68 on the push card 58 and is fixedly connected to the push card 58 by interference fit with the mounting hole 68. The guide member 6 is slidably engaged with two mating parts 28 in the corresponding mating parts 27, specifically with the guide groove. The position of the guide member 6 passing through the mounting hole 68 is located between the two mating parts 28 in the corresponding mating parts 27 along the Y-axis.

[0169] See Figure 29 to Figure 31 , Figure 29 to Figure 31 The elastic element 7 in this embodiment is shown. (As shown...) Figure 29 As shown, the elastic element 7 is mounted on the bottom shell 20 and provides pushing assistance when the armature assembly 10 moves from the first position to the second position. The number of elastic elements 7 can be one or more; in this embodiment, there are two. The two elastic elements 7 are located on both sides of the push card 58 along the X-axis and on the back of the connecting portion 65. The elastic element 7 is fixed to the bottom shell 17 and has elasticity. In this embodiment, the elastic element 7 is also correspondingly arranged with the guide element 6. The elastic element 7 stores energy due to deformation when the moving contact group 9 moves away from the stationary contact group 10 and releases energy by restoring deformation when the moving contact group 9 moves towards the stationary contact group 10. Figure 30 As shown, the elastic member 7 has a fixed part 108, a first bent part 109, a pushing surface 110, and a relief groove 111 that are integrally connected. The fixed part 108 is fixedly connected to the bottom shell 20, and the first bent part 109 is bent to make the elastic member 7 elastic. Figure 30 and Figure 31 As shown, the pushing surface 110 is used to push against the back side of the connecting part 65. The clearance groove 111 allows the corresponding guide 6 to pass through and is configured not to contact the guide 6.

[0170] See Figure 29 and Figure 32 , Figure 29 and Figure 32 The microswitch 8 in this embodiment is shown. In this embodiment, the microswitch 8 is used to send a relay status signal to an external relay status sensing circuit. For example... Figure 29 As shown, the micro switch 8 includes two fixed contacts 112 and a moving spring 113. Figure 32As shown, two fixed contacts 112 are arranged along the X-axis direction. The fixed contacts 112 are fixed to the bottom shell 20 and extend along the Z-axis direction. Both fixed contacts 112 are provided with signal output terminals 114. The signal output terminals 114 penetrate the bottom shell 20 along the Z-axis direction and extend out of the bottom surface of the bottom shell 20 to be electrically connected to the relay status sensing circuit (see...). Figure 2 In this embodiment, the movable spring 113 is provided with a fixed portion 115, a second bending portion 116, and a bridging portion 117. The fixed portion 115 is fixed to the bottom shell 20, and the bridging portion 117 is used to conduct the two fixed contacts 112. The second bending portion 116 is located between the fixed portion 115 and the bridging portion 117 and forms a bend to make the movable spring 113 elastic. The movable spring 113 is adapted to be pushed by the pushing portion 66 and deformed to abut against the two fixed contacts 112, and to recover its deformation and move away from the two fixed contacts 112 when the pushing portion 66 moves away. As can be seen from the above description, when the armature assembly 10 is in the first position, the pushing portion 66 pushes the movable spring 113, causing the movable spring 113 to deform and abut against the fixed contacts 112, so as to send 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 push part 66 moves away from the moving spring 113, the moving spring 113 recovers its deformation and moves away from the fixed contact 112, so as to send a relay status signal that the relay 1 is in the conducting state to the relay status sensing circuit.

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

[0172] See Figure 28 , Figure 28 The structure of relay 1 in its initial state is shown. (Example) Figure 28 As shown, in the initial state, 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 moves away from the stationary contact group 14 and abuts against the limiting member 61 in the direction toward the stationary 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 pusher 58 abuts against the elastic member 7 in the direction away from the stationary contact group 14, and the elastic member 7 deforms to store energy. The pusher 66 pushes against the moving spring 113, causing the moving spring 113 to deform and abut against the two fixed contacts 112, and the two signal output terminals 114 are connected to each other, and the relay state sensing circuit senses that relay 1 is in the off state.

[0173] When the signal input terminal 36 receives the first pulse signal, the coil winding 32 temporarily forms a first magnetic field. The two magnetic drive ends 39 drive the armature assembly 10 away from the first position and move towards the second position along the Y-axis with magnetic driving force. At this time, the elastic element 7 and the moving spring 113 recover their deformation and release energy. Under the action of the magnetic driving force of the two magnetic drive ends 39 and the elastic force of the elastic element 7 and the moving spring 113, the moving part 17 moves towards the stationary contact group 14 with acceleration. After the moving contact group 13 abuts against the stationary contact group 14, electrical conduction occurs between the first load terminal 99 and the second load terminal 105, and power is supplied to the load through the relay 1. The armature assembly 10 and the push card 58 enter overtravel under the magnetic driving force of the two magnetic drive ends 39 and continue to move towards the stationary contact 14. The elastic support group 60 begins to store energy, and the moving contact group 13 no longer abuts against the limiting member 61 until the armature assembly 10 is limited by the two magnetic drive ends 39, and the armature assembly 10 moves to the second position.

[0174] See Figure 25 , Figure 25 The structure of relay 1 in the on state is shown. (Example) Figure 25 As shown, when the armature assembly 10 moves to the second position, the moving contact group 13 abuts against the stationary contact group 14, and the electrical connection between the first load terminal 99 and the second load terminal 105 is established, supplying power to the load. The moving contact group 13 no longer abuts against the limiting member 61, and the elastic support group 60 stores energy. Pushing the card 58 away from the elastic member 7 causes the elastic member 7 to return to its original deformation, and pushing the part 66 away from the moving spring 113 causes the moving spring 113 to return to its original deformation and move away from the two fixed contacts 112. The two signal output terminals 114 are turned off from each other, and the relay status sensing circuit senses that the relay 1 is in the conducting state. Figure 25 As shown, when the armature assembly 10 moves to the second position, the partition 30 is close to the push card 58 to isolate the adjacent contact cavity 29. It should be noted that in other embodiments, the partition 30 may also be provided on the push card 58, as long as it is located between adjacent contact groups 11 when the moving contact group 13 abuts against the stationary contact group 14.

[0175] After the first pulse signal disappears, relay 1 remains in the conducting state due to the magnetic holding force of the magnetic circuit part 3.

[0176] 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 drive the armature assembly 10 away from the second position and move towards the first position along the Y-axis with magnetic driving force. At this time, the elastic support group 60 recovers its deformation and releases energy. Under the action of the magnetic driving force of the two magnetic drive ends 39 and the elastic force of the elastic support group 60, the armature assembly 10 and the pusher 58 move away from the stationary contact group 14 with acceleration until the moving contact group 13 leaves the stationary contact group 14. The deformed part of the elastic support group 60 recovers and pushes the moving contact group 13 to abut against the limiting member 61. At this time, the electrical connection between the first load terminal 99 and the second load terminal 105 is cut off, the relay 1 is in the off state, and the power supply cannot supply power to the load. Subsequently, the moving part 17 continues to move away from the stationary contact assembly 14 as a whole, pushing the card 58 to push against the elastic member 7, causing the elastic member 7 to deform and store energy; the pushing part 66 pushes against the moving spring 113, causing the moving spring 92 to deform, store energy, and abut against the two fixed contacts 112, thus electrically connecting the two signal output terminals 114, and the relay status sensing circuit senses that the relay 1 is in the off state. Finally, the movement of the armature assembly 10 is limited by the two magnetic drive ends 39, and the armature assembly 10 moves to the position where... Figure 28 The first position shown.

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

[0178] The electricity meter in this embodiment uses the aforementioned relay 1.

[0179] like Figure 33 As shown, the meter 1 in this embodiment also includes a current transformer 118. The current transformer 118 is used to convert a large current into a small current for measurement. In this embodiment, there are three current transformers 118, which are arranged along the X-axis and respectively mounted on the portions of the second stationary contacts 93 of the three stationary contact groups 14 that extend out of the receiving member 2. In other embodiments, they may also be mounted on the portions of the first stationary contacts 92 of the three stationary contact groups 14 that extend out of the receiving member 2.

[0180] This embodiment represents a highly innovative improvement to the magnetic circuit portion 3 of the existing oscillating magnetic latching relay. Based on the coil assembly 9 of the oscillating magnetic latching relay, this embodiment improves the arrangement of the two armatures 43, which are fixed to the permanent magnet 42, from parallel to intersecting, with their intersecting portions 55 spaced apart. This allows the armature assembly 10 to transition from oscillating relative to the coil assembly 9 to linear motion relative to the coil assembly 9. Compared to the magnetic circuit portion 3 of the existing oscillating magnetic latching relay, because the armature assembly 10 moves linearly relative to the coil assembly 9, there is no loss of the radial component of the oscillation stroke of the oscillating magnetic latching relay. Therefore, the space utilization of the relay 1 is higher, creating more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary contact 89 within a limited space. Compared to 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 movement direction of the armature assembly 10 is perpendicular to the X-axis direction along the Y-axis direction, the magnetic circuit portion 3 in this embodiment does not require the relay 1 to have a long length in one direction (whether it is the X-axis direction or the Y-axis direction). This allows the relay 1 to be more easily adapted to limited space and creates more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary contact 89 in limited space.

[0181] In this embodiment, by modifying the two armatures in the armature assembly 10 to cross each other based on 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 engaging ends 50 of the armature assembly 10 through the permanent magnet 42 and the two armatures 43. 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 and second parts can form a complete magnetic circuit in both the magnetic latching and magnetic driving states. This complete magnetic circuit will not cause large magnetic losses due to the large air gap between the two engaging 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. Under the condition of equivalent magnetic driving force, the power consumption required for the coil assembly 9 to achieve magnetic driving can be reduced, which is beneficial to making the size of the coil assembly 9 smaller. Therefore, it can create more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary contact 89 in a limited space. In addition, in the prior art, direct-acting magnetic latching relays often form two opposing magnetic circuits in the magnetic latching state. One magnetic circuit passes through the yoke plate, and the other passes through the stationary iron core. The magnetic forces exerted by the two magnetic circuits on the moving iron core are in opposite directions. In this embodiment, the magnetic circuits all pass through the coil assembly 9, so the above-mentioned problem does not exist. Compared with the prior art, the magnetic force during magnetic latching is greater. Especially when the relay 1 is subjected to a large fault current, the armature assembly 10 is less likely to break free from the magnetic latching state and move. This helps to prevent the moving contact 72 from separating from the stationary contact 89 due to the fault current, which would cause destructive arcing.

[0182] In this embodiment, when the armature assembly 10 is in a magnetically held state in 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 force 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 a first part of a push magnetic circuit without air gap through the armature assembly 10, and the two magnetic drive ends 39 form a second part of a push magnetic circuit that runs through the entire coil assembly 9 through the coil assembly 9. The first part and the second part of the push magnetic circuit constitute a complete push magnetic circuit. This push magnetic circuit only has the inevitable stroke air gap and no other air gaps, so the magnetic efficiency is higher. The magnetic driving force of the two magnetic drive ends 39 on the armature assembly 10 is stronger under the same power consumption, which is more conducive to increasing the safe distance between the moving contact 72 and the stationary contact 89. Similarly, when the armature assembly 10 is in the magnetic holding state in the second position, when the coil assembly 9 is excited by the pulse electrical signal to reverse the polarity of the two magnetic drive ends 39 temporarily formed, not only do the two magnetic drive ends 39 generate magnetic repulsion force on the fourth attraction part 54 and the second attraction part 52, but also the first part of the push magnetic circuit without 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 push magnetic circuit that runs through the entire coil assembly 9 through the coil assembly 9. The first part and the second part of the push magnetic circuit constitute a complete push magnetic circuit. In this push magnetic circuit, there is only the inevitable stroke air gap, and no other air gaps, so it has the same technical effect.

[0183] In this embodiment, when the armature assembly 10 is in the magnetic holding state in the second position and the moving contact 72 abuts against the stationary contact 89 to conduct the external circuit, a first part of a holding magnetic circuit without air gap is formed between the second engaging part 52 and the fourth engaging part 54 through the armature assembly 10. The two magnetic drive ends 39 form a second part of a holding magnetic circuit that runs through the entire coil assembly 9 through the coil assembly 9. The first part and the second part of the holding magnetic circuit constitute a complete holding magnetic circuit. This holding magnetic circuit is completely closed when the second engaging part 52 and the fourth engaging part 54 engage the two magnetic drive ends 39. When the second engaging part 52 and the fourth engaging part 54 are set 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 holding state can be improved, making the magnetic holding force stronger and the reliability higher. Especially when the relay 1 is subjected to a fault current impact, the armature assembly 10 is less likely to break free from the magnetic holding state and move, which helps to avoid the moving contact 72 and the stationary contact 89 from separating due to the fault current and causing destructive arcing.

[0184] In this embodiment, for the two magnetic drive ends 39 arranged in the X direction, the magnetic fields of the two attraction portions 50 that are attracted or close to them both originate from the same permanent magnet 42. Therefore, during the movement of the armature assembly 10 from the first position to the second position or from the second position to the first position, the magnitude of the magnetic driving force is relatively equal and the difference is small. Therefore, the balance of the magnetic driving force is better when the relay 1 switches on and off, the linear movement of the armature assembly 10 is less prone to skew, the relay 1 is less prone to jamming, and its lifespan is longer.

[0185] In this embodiment, since the first attracting part 51 and the second attracting part 52 are located at both ends of the first armature 48 along the X-axis, and the third attracting part 53 and the fourth attracting part 54 are located at both ends of the second armature 49 along the X-axis, the position where the first armature 48 is fixed to the permanent magnet 42 is between the first attracting part 51 and the second attracting part 52, and the position where the second armature 49 is fixed to the permanent magnet 42 is also between the third attracting part 53 and the fourth attracting part 54. This arrangement makes the difference in magnetic field strength between the two attracting parts 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 between the coil assembly 9 in the two strokes is smaller. Secondly, since the first engaging part 51 and the fourth engaging part 54 are arranged along the Y-axis, the third engaging part 53 and the second engaging part 52 are arranged along the Y-axis, the first engaging part 51 and the third engaging part 53 are arranged along the X-axis, and the fourth engaging part 54 and the second engaging part 52 are arranged along the X-axis, the four engaging parts 50 of the armature assembly 10 are respectively located at the four vertices of the rectangle on the first projection plane U. This makes it easier to adjust the size of the armature assembly 10 along the X-axis and Y-axis, and is more conducive to creating more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary contact 89 in a limited space.

[0186] In this embodiment, when the armature assembly 10 is in the second position, the magnetic circuit portion 3 forms a closed magnetic circuit. Compared with the fourth 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 less magnetic loss, stronger magnetic holding force, and stronger resistance to fault current impact.

[0187] In this embodiment, the two magnetic drive ends 39 extend along the X-axis 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 is more certain, which helps to ensure a safe distance between the moving contact 72 and the stationary contact 89.

[0188] In this embodiment, the axis of the coil winding 9 is perpendicular to the direction of movement of the armature assembly 10. This layout allows space for the movement of the armature assembly 10 along the Y-axis, making the entire magnetic circuit 3 more compact and space-saving. This, in turn, creates more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary contact 89 within a limited space. Furthermore, with fewer other components of the relay 1 along the axis of the coil winding 9, this layout makes it easier to fully utilize the limited space, extending the axial length of the coil winding 9. This allows the coil winding 9 to output a larger magnetic field strength, thereby increasing the magnetic driving force of the two magnetic drive ends 39 and creating even more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary contact 89 within a limited space.

[0189] In this embodiment, the two magnetic poles of the permanent magnet 42 are arranged along the Y-axis direction. Compared with the optional arrangement along the X-axis or Z-axis direction, the contact area between the permanent magnet 42 and the two armatures 43 is larger and the magnetic conduction effect is better. It can also avoid excessive bending of the two armatures 43, reduce the structural complexity and manufacturing difficulty of the two armatures 43, and also help to reduce the volume of the armature assembly 10.

[0190] In this embodiment, the two armatures 43 are provided with a narrower section 56 and a wider section 57, and the part 55 that intersects with each other is located in the narrower section 56. This is beneficial to not increasing the width of the armature assembly 10 along the Z-axis direction, provided that the parts 55 that intersect with each other are spaced apart along the Z-axis direction.

[0191] In this embodiment, the position where the armature 43 is fixed to the permanent magnet 42 is located in the wider section 57, which is conducive to 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. Therefore, it is beneficial to increase the movement stroke of the armature assembly 10 along the Y-axis, thereby increasing the distance between the moving contact 72 and the stationary contact 89.

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

[0193] In this embodiment, there are at least two permanent magnets 42, located on both sides of the intersecting portion 55, and each armature 43 is fixedly connected to the same polarity of the permanent magnet 42. Compared to having only one permanent magnet 42 located on one side of the intersecting portion 55, this method is more conducive to maintaining the consistency of the magnetic field strength on both sides of the armature assembly 10 along the X-axis direction. The linear movement of the armature assembly 10 is less prone to skew, and the relay 1 is less prone to jamming and has a longer lifespan.

[0194] In this embodiment, permanent magnets 42 are arranged on both sides of the intersecting portion 55. Without increasing the dimensions of the armature assembly 10 along the Y-axis and Z-axis, the space occupied by the armature assembly 10 is fully utilized to increase the magnetic force between the magnetic drive end 39 and the armature assembly 10, which is more conducive to increasing the safe distance between the moving contact 72 and the stationary contact 89. Since each permanent magnet 42 is connected together by two armatures 43, the difference in the strength of the magnetic field of each permanent magnet 42 is effectively weakened by the two armatures 43. The magnetic pushing force between the armatures 43 on both sides and the magnetic drive end 39 can be more balanced along the X-axis, so the relay 1 is less prone to jamming and has a longer lifespan.

[0195] In this embodiment, when two or more permanent magnets 42 are used, the armature assembly 10 and the coil assembly 9 can form two or more magnetic circuits, whether in the magnetic holding state or the magnetic driving state. The magnetic force is greater because they are superimposed on each other. Compared with only one permanent magnet 42, it is more beneficial to increase the distance between the moving contact 72 and the stationary contact 89.

[0196] 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, which makes the magnetic field strength on both sides of the armature assembly 10 along the X-axis direction more consistent, and the center of gravity is more likely to be kept on the symmetry plane V. The linear movement of the armature assembly 10 is less likely to be skewed, and the relay 1 is less likely to jam and has a longer lifespan.

[0197] In this embodiment, each moving contact 72 is provided with a current-carrying bridge 73, a first moving contact 75, and a second moving contact 76. The first stationary contact 92 and the second stationary contact 93 are electrically connected to an external circuit, making the actual safe distance between the moving contact 72 and the stationary contact 89 twice the distance between the moving contact 74 and the stationary contact 90. This is beneficial for increasing the safe distance between the moving contact 72 and the stationary contact 89. This is because, in this embodiment, the safe distance between the moving contact 72 and the stationary contact 89 actually refers to the distance through which the stationary contacts 90 of the two stationary contacts 89 are connected when the moving contact 72 is far away from the two stationary contacts 89. Therefore, this distance is twice the actual distance between the moving contact 74 on the moving contact 72 and the stationary contact 90 on the stationary contact 89. Furthermore, in this technical solution, the two stationary contacts 89 are electrically connected to an external circuit, which simplifies the electrical connection structure and makes assembly more convenient compared to electrically connecting the moving contact 72 and the stationary contact 89 to the external circuit separately.

[0198] In this embodiment, the number of moving contact groups 13 is at least two, enabling the relay 1 to control the on / off state of more external circuits.

[0199] In this embodiment, the number of moving contact groups 13 is three, which enables the relay 1 to simultaneously control the on / off state of each phase of the three-phase AC power, thus improving safety.

[0200] In this embodiment, each moving contact group 13 is arranged along the X-axis and abuts against or moves away from the corresponding stationary contact group 14 along the Y-axis. Compared with the alternative scheme where the arrangement direction of the moving contact group 13 is the same as the movement direction, this is more conducive to making full use of the limited space and creating more favorable conditions for increasing the safe distance between the moving contact 72 and the stationary contact 89. Furthermore, it ensures that the stationary contact group 14 corresponding to each moving contact group 13 is not obstructed in the terminal lead-out direction, making it easier to lead out from the side of the receiving member 2 and saving copper consumption.

[0201] The layout of this embodiment also allows the coil assembly 9, whose axis extends along the X-axis, to not need to have contact portions 5 on both sides along the X-axis. Therefore, the coil assembly 9 has ample space in the axial direction, and the length of the coil assembly 9 can be increased in the X-axis direction as needed without increasing the overall size of the relay 1, thereby increasing the magnetic driving force and helping to increase the safe distance between the moving contact 72 and the stationary contact 89.

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

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

[0204] In this embodiment, the stationary contact group 14 is arranged along the X-axis direction, and two stationary contacts 89 in the stationary contact group 14 are also arranged along the X-axis direction, so that all six stationary contacts 89 are arranged along the X-axis direction, which is beneficial for the stationary contacts 89 to be connected to the external circuit and for the installation of the current transformer 118 on the stationary contacts 89.

[0205] In this embodiment, the first flow passage 95 extends along the Z-axis direction, which facilitates the arrangement of the first stationary contact 94 along the Z-axis direction; the fifth flow passage 101 extends along the Z-axis direction, which facilitates the arrangement of the second stationary contact 100 along the Z-axis direction.

[0206] In this embodiment, the second flow passage 96 extends from the side of the first flow passage 95 away from the second stationary contact 93 along the X-axis direction along the Y-axis direction, and the second flow passage 96 is perpendicular to the X-axis direction, so that the second flow passage 96 can provide clearance space for the installation of the current transformer 118 on the second stationary contact 93.

[0207] In this embodiment, the third current-passing part 97 extends from the end of the second current-passing part 96 away from the first current-passing part 95 along the Y-axis direction and away from the second stationary contact 93 along the X-axis direction, and the fourth current-passing part 98 extends from the bottom end of the third current-passing part 97 along the Z-axis direction along the Y-axis direction, which facilitates the connection of power supply or load, and also makes room for the installation of current transformer 118 in the seventh current-passing part 104.

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

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

[0210] In this embodiment, the current transformer 118 is adapted to be installed in the seventh current-passing part 104 of the second contact 93, so that the first stationary contact 92 will not protrude too much from the receiving member 2 in the X-axis direction. In particular, after the current transformer 118 is installed, it will not protrude too much, which makes it easier to control the size of the entire relay 1 in the X-axis direction.

[0211] In this embodiment, the push card 58 is fixedly connected to the armature assembly 10, and each moving contact group 13 is mounted on and supported by the push card 58. This allows the movement stroke of the armature assembly 10 along the Y-axis to be better converted into the movement stroke of the moving contact 72, avoiding the loss of driving force and movement stroke. Compared to the swing-type magnetic latching relay in the prior art, the armature assembly 10 can be fixedly connected to the push card 58 precisely because of the aforementioned magnetic circuit part 3. At the same time, compared to the direct-acting magnetic latching relay in the prior art, the armature assembly 10 has a larger size in the X-axis direction perpendicular to its movement direction precisely because of the aforementioned magnetic circuit part 3, instead of achieving linear movement through a push rod with a smaller diameter. In this embodiment, the push card 58 is used to mount and support each moving contact group 13. Therefore, when the moving contact group 13 is arranged along the X-axis direction, jamming problems or reduced lifespan due to severe wear can be avoided.

[0212] In this embodiment, the push card 58 and the armature assembly 10 insert are integrally injection molded, which avoids possible errors during the assembly process 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 the limited space.

[0213] In this embodiment, the dimension of the accommodating portion 64 along the X-axis is greater than that along the Y-axis. Moreover, among the longitudinal sections of the push card 58 perpendicular to the Y-axis, the dimension of the longitudinal section of the accommodating portion 64 along the X-axis is the smallest among the longitudinal sections of the push card 58 along the X-axis. Therefore, when each moving contact group 13 is arranged along the X-axis and the moving contact 72 extends along the X-axis, it is less prone to jamming compared to the prior art.

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

[0215] In this embodiment, the elastic support group 60 stores energy when the moving contact group 13 abuts against the stationary contact group 14 and releases energy when the moving contact group 13 moves away from the stationary contact group 14. This effectively generates additional repulsive force between the moving contact group 13 and the stationary contact group 14 when the external control circuit is turned off, helping the moving contact group 13 move away from the stationary contact group 14. Especially when a short-circuit protection unit 12 for resisting large fault current is also provided between the moving contact group 13 and the stationary contact group 14, when the moving contact group 13 abuts against the stationary contact group 14, the current flowing through the moving contact 72 causes a magnetic circuit to be formed on the short-circuit protection unit 12, thereby generating an attractive force between the moving contact group 13 and the stationary contact group 14. At this time, the repulsive force formed by the elastic force of the elastic support group 60 can offset or partially offset the corresponding attractive force when the load current is normal, thereby helping the moving contact group 13 move away from the stationary contact group 14.

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

[0217] In this embodiment, the elastic support portion 82 includes two elastic arms 84 fixedly connected to the overflow bridge 73, which facilitates the free swinging of the movable contact 72 to adjust its posture.

[0218] In this embodiment, the two elastic arms 84 are fixed to the overcurrent bridge 73 at the back of the first moving contact 75 and the second moving contact 76, respectively. This allows the elastic force of the two elastic arms 84 to act directly on the two moving contacts 74, and further ensures that the two moving contacts 74 reliably abut against the corresponding stationary contact 89.

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

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

[0221] In this embodiment, the first guide portion 26 and the second guide portion 67 slide in cooperation along the Y-axis direction, which can guide the linear movement of the push card 58, avoid jamming and skew during the movement of the push card 58, and effectively ensure that each moving contact 72 reliably abuts against the stationary contact 89.

[0222] In this embodiment, the second guide portion 67 is located in the middle of the push card 58 along the X-axis direction, which is closer to the center of mass of the entire moving part. This is more conducive to guiding the movement of the push card 58 and avoiding jamming and skewness when the push card 58 moves.

[0223] In this embodiment, the elastic element 7 stores energy due to deformation when the moving contact group 13 moves away from the stationary contact group 14, and releases energy due to recovery deformation when the moving contact group 13 moves towards the stationary contact group 14. This better assists the moving component 17 in moving away from the first position to the second position. It is beneficial to increase the travel distance of the moving contact 72, and therefore also beneficial to increase the safe distance between the moving contact 72 and the stationary contact 89.

[0224] In this embodiment, by providing the short-circuit protection unit 12, the first magnetic conductor group 15 and the second magnetic conductor group 16 can form a magnetic circuit when current flows through the moving contact group 13, thereby creating an attraction force between the first magnetic conductor group 15 and the second magnetic conductor group 16. The larger the current, the greater this attraction force, thus preventing the moving contact group 13 from detaching from the stationary contact group 14 when a large fault current impacts the contact portion 5, and preventing destructive arcing.

[0225] In this embodiment, the first magnetic conductor group 13 is at least partially located on the back side of the overcurrent bridge 73, and the second magnetic conductor group 16 is at least partially located between the overcurrent bridge 73 and the reverse overcurrent section 103. This allows not only the current of the moving contact 72 to form a magnetic circuit between the first magnetic conductor group 15 and the second magnetic conductor group 16, but also, since the current direction of the reverse overcurrent section 103 is opposite to that of the moving contact 72, the direction of the magnetic field lines generated by the reverse overcurrent section 103 on the side where the second magnetic conductor group 16 is located is the same as the direction of the magnetic field lines generated by the overcurrent bridge 73 on the side where the second magnetic conductor group 16 is located. This strengthens the magnetic field strength of the second magnetic conductor group 16, making the magnetic attraction between the second magnetic conductor group 16 and the first magnetic conductor group 15 stronger. Under fault high current, the moving contact group 15 and the stationary contact group 16 are less likely to separate, making the relay 1 more reliable and stronger in resisting high current surges. Furthermore, since the push card 58 and the armature assembly 10 are injection molded as a single unit, their integrity is good. The push card 58 and the armature assembly 10 will inevitably move synchronously and have high movement stability. Therefore, when the armature assembly 10 moves linearly along the Y-axis, the push card 58 can also move linearly along the Y-axis, ensuring that the moving contact group 13 and the first magnetic conductor group 15 driven by the push block 58 can also move linearly along the Y-axis. This allows the first magnetic conductor group 15 to move stably and form a stable relative position relationship with the second magnetic conductor group 16 when the moving contact group 13 and the stationary contact group are closed. It also reliably forms the expected small magnetic gap with the second magnetic conductor group 16, ensuring a stable and reliable magnetic attraction effect between the first magnetic conductor group 15 and the second magnetic conductor group 16. Under fault high current, the moving contact group 13 and the stationary contact group 14 are not prone to separation.

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

[0227] In this embodiment, the insulator 107 is formed in the accommodating member 2. Compared with a separate insulator 107, it occupies less space and the relay has a higher degree of integration.

[0228] In this embodiment, since the outer surface of the insulator 107 covering the second magnetic conductor group 16 is provided with protrusions 23 or grooves, the creepage distance between the two stationary contacts 89 can be increased, and the two stationary contacts 89 are less likely to conduct through the surface of the insulator 107, thus making it less likely for a short circuit to occur.

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

[0230] In this embodiment, the first magnetic conductor 77 is disposed corresponding to the moving contact 72. The magnetic circuit provides higher constraint on the magnetic field generated by the overcurrent in the moving contact 72, resulting in lower magnetic loss and a stronger attraction between the first magnetic conductor 77 and the second magnetic conductor 106. The first magnetic conductor 77 is fixedly connected to the moving contact 72, making the installation of the first magnetic conductor 77 more convenient.

[0231] In this embodiment, the two extensions 79 span the moving contact 72 and approach the second magnetic conductor group 16 when the moving contact 72 abuts against the two stationary contacts 89. Therefore, when the first magnetic conductor group 15 and the second conductor group 16 form a magnetic circuit, the air gap is smaller and the attraction between the first magnetic conductor group 15 and the second conductor group 16 is greater.

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

[0233] In this embodiment, the insulator 107 is formed in the accommodating member 2, which occupies less space and allows for higher integration of the relay 1 compared to providing a separate insulator 107.

[0234] In this embodiment, the second magnetic conductor assembly 16 is fixedly connected to the receiving cavity 22 of the bottom shell 20, making the second magnetic conductor assembly easier to install.

[0235] In this embodiment, a partition 30 is provided between adjacent contact cavities to prevent short circuits between adjacent stationary contact groups 14 from causing short circuits between two phases of the three-phase AC power. It also prevents arcing in some contact groups 11 from being conducted to other contact groups 11, causing short circuits between two phases. In other embodiments, the partition 30 is provided on the push card 58, which also serves the same purpose.

[0236] In this embodiment, when the moving contact group 13 abuts against the stationary contact group 14, the partition 30 isolates the adjacent contact cavity 29, so the partition 30 has a better blocking effect.

[0237] In this embodiment, the partition portion 30 is formed on the receiving member 2 and is a part of the receiving member 2. It can be integrally injection molded during the manufacturing of the receiving member 2, thus achieving high integration and simplifying manufacturing. The partition portion 30 formed on the push card 58 has a similar effect.

[0238] In this embodiment, when the moving contact assembly 13 abuts against the stationary contact assembly 14, the partition 30 isolates the adjacent contact cavity 29. Therefore, the partition 30 has a better blocking effect.

[0239] In this embodiment, the coil accommodating cavity 24 is provided with several partitions 25 on both sides along the X-axis direction. Therefore, the size of the coil accommodating cavity 24 can be increased along the X-axis direction as needed to accommodate a longer coil assembly 9 of the coil winding 32.

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

[0241] In this embodiment, two guide members 6 are arranged on both sides of the push card 58 along the X-axis direction. Regardless of which side the push card 58 may tilt to, it can be effectively guided, thereby better preventing the moving part 17 from jamming or tilting.

[0242] In this embodiment, the guide member 6 is slidably engaged or fixedly connected to the push card 58 between the two mating parts 70 of the corresponding mating part group 69 along the Y-axis direction. This helps the guide member 6 to maintain its extension along the Y-axis direction during assembly, preventing it from tilting or wobbling along the X-axis. Moreover, when the gravity direction is the Z-axis direction, the guide member 6 can also be supported, and the moving part 17 formed by the armature assembly 10, the push card 58, and each moving contact group 13 can be supported by the guide member 6. Especially when there are three moving contact groups 13 arranged along the X-axis direction, the weight of the moving part 17 is relatively large. Therefore, the two mating parts 70 in the mating part group 69 support the moving part 17 in the gravity direction, preventing the moving part 17 from tilting in the gravity direction.

[0243] In this embodiment, the elastic element 7 stores energy due to deformation when the moving contact group 13 moves away from the stationary contact group 14, and releases energy due to recovery deformation when the moving contact group 13 moves towards the stationary contact group 14. This better assists the moving component 17 in moving away from the first position to the second position. It is beneficial to increase the travel distance of the moving contact 72, and therefore also beneficial to increase the safe distance between the moving contact 72 and the stationary contact 89.

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

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

Claims

1. A relay characterized in that it The application relates to a magnetic contactor, comprising: an armature assembly moving along a Y-axis direction; a push card integrally formed with the armature assembly by insert injection molding; a static contactor group provided with a reverse flow portion; a dynamic contactor group identical in number to the static contactor group and corresponding to the static contactor group, the dynamic contactor group being arranged on the push card and carried by the push card to abut or move away from the static contactor group along the Y-axis direction, the flow direction of the dynamic contactor group being opposite to the flow direction of the reverse flow portion along an X-axis direction; and an anti-short circuit unit comprising a first magnetic conductor group fixed relative to the dynamic contactor group and a second magnetic conductor group fixed relative to the static contactor group, the first magnetic conductor group and the second magnetic conductor group forming a magnetic circuit when the dynamic contactor group flows, so that the first magnetic conductor group and the second magnetic conductor group generate an attractive force along the Y-axis direction; the second magnetic conductor group is at least partially located between the dynamic contactor group and the reverse flow portion along the Y-axis direction.

2. A relay according to claim 1, characterised in that The static contactor group comprises 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 contactor group comprises at least one dynamic contact adapted to abut or move away from the two static contacts and 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.

3. A relay according to claim 2, wherein the magnetic field generated by the coil is arranged to be substantially uniform across the face of the armature. The number of the dynamic contactor groups is at least two, each dynamic contactor group is arranged along the X-axis direction, and each static contactor group is arranged along the X-axis direction.

4. A relay according to claim 3, wherein the magnetic field generated by the coil is arranged to be substantially uniform across the face of the armature. The number of the dynamic contactor groups is three.

5. A relay according to claim 2, wherein the magnetic circuit is formed by a magnetic core (2) and a magnetic yoke (3). The dynamic contactor group comprises at least two dynamic contacts, and each dynamic contact is arranged along a Z-axis direction.

6. A relay according to claim 2, wherein The first magnetic conductor group and the second magnetic conductor group are arranged along the Y-axis direction.

7. A relay according to claim 2, wherein the magnetic circuit is formed by a magnetic core (2) and a magnetic yoke (3). The first magnetic conductor group comprises at least one first magnetic conductor provided with a body located on the back surface of the flow bridge away from the static contactor group.

8. A relay according to claim 7, wherein the relay is a latching relay. The first magnetic conductor is further provided with an extension part extending from the body along the Y-axis direction, and the extension part is close to the second magnetic conductor group along the Y-axis direction when the dynamic contactor group abuts the static contactor group.

9. A relay according to claim 2, wherein the relay is a latching relay. The two static contacts are respectively provided with static contact points, and the second magnetic conductor group is located between the static contact points of the two static contacts along the X-axis direction.

10. A relay according to claim 1, wherein the relay is a miniature relay. The application further comprises a coil assembly provided with two magnetic driving ends, and the coil assembly is used to drive the armature assembly to move along the Y-axis direction.

11. A relay according to claim 2, wherein the relay is a latching relay. The push card comprises a containing part and a connecting part; the containing part is used to contain the armature assembly, and the connecting part is used to arrange and carry the dynamic contactor group.

12. A relay according to claim 11, wherein the relay is a latching relay. The number of the dynamic contactor groups is at least two, each dynamic contactor group is arranged along the X-axis direction, and the connecting part extends along the X-axis direction.

13. A relay according to claim 12, wherein the relay is a latching relay. Along the X-axis direction, the containing part is located at a middle position relative to the connecting part; in each longitudinal section of the push card perpendicular to the Y-axis direction, the size of the longitudinal section of the containing part along the X-axis direction is the smallest among the sizes of the longitudinal sections of the push card along the X-axis direction.

14. A relay according to claim 11, wherein the relay is a latching relay. The elastic support group comprises elastic supports, each of the elastic supports comprises a support body and an elastic support part which are connected as one body, the support body is fixed relative to the push card, and the elastic support part is the same in number and corresponds to the moving contact group.

15. A relay according to claim 14, wherein the relay is a latching relay. The elastic support part comprises two elastic arms, and the two elastic arms are fixed to the overcurrent bridge.

16. A relay according to claim 15, wherein the relay is a latching relay. The moving contact is provided with two moving contact points in the X-axis direction, and the positions where the two elastic arms are fixed to the overcurrent bridge are located on the back surfaces of the corresponding moving contact points.

17. A relay according to claim 16, wherein the relay is a latching relay. The connecting part is provided with a limiting part group facing the static contact group, each limiting part group is provided with two limiting parts, the support body is provided with an adapting part, the limiting part and the adapting part are in sliding fit in the Y-axis direction and limit the movement of the support body perpendicular to the Y-axis direction, the limiting part is provided with an abutting part, the limiting part abuts against each moving contact through the abutting part, and the limiting part limits the movement of the support body in the Y-axis direction.

18. A relay according to claim 15, wherein the relay is a miniature relay. The connecting part is provided with a limiting part group facing the static contact group, each limiting part group is provided with two limiting parts, the support body is provided with an adapting part, the limiting part and the adapting part are in sliding fit in the Y-axis direction and limit the movement of the support body perpendicular to the Y-axis direction, the limiting part is provided with an abutting part, the limiting part abuts against each moving contact through the abutting part, and the limiting part limits the movement of the support body in the Y-axis direction.

19. A relay according to claim 18, wherein the relay is a latching relay. The connecting part is provided with a limiting part group facing the static contact group, each limiting part group is provided with two limiting parts, the support body is provided with an adapting part, the limiting part and the adapting part are in sliding fit in the Y-axis direction and limit the movement of the support body perpendicular to the Y-axis direction, the limiting part is provided with an abutting part, the limiting part abuts against each moving contact through the abutting part, and the limiting part limits the movement of the support body in the Y-axis direction.

20. A relay according to claim 11, wherein the relay is a miniature relay. The connecting part is provided with a limiting part group facing the static contact group, each limiting part group is provided with two limiting parts, the support body is provided with an adapting part, the limiting part and the adapting part are in sliding fit in the Y-axis direction and limit the movement of the support body perpendicular to the Y-axis direction, the limiting part is provided with an abutting part, the limiting part abuts against each moving contact through the abutting part, and the limiting part limits the movement of the support body in the Y-axis direction.

21. A relay according to claim 20, wherein the relay is a miniature relay. The connecting part is provided with a limiting part group facing the static contact group, each limiting part group is provided with two limiting parts, the support body is provided with an adapting part, the limiting part and the adapting part are in sliding fit in the Y-axis direction and limit the movement of the support body perpendicular to the Y-axis direction, the limiting part is provided with an abutting part, the limiting part abuts against each moving contact through the abutting part, and the limiting part limits the movement of the support body in the Y-axis direction.

22. A relay according to claim 20, wherein the relay is a miniature relay. The connecting part is provided with a limiting part group facing the static contact group, each limiting part group is provided with two limiting parts, the support body is provided with an adapting part, the limiting part and the adapting part are in sliding fit in the Y-axis direction and limit the movement of the support body perpendicular to the Y-axis direction, the limiting part is provided with an abutting part, the limiting part abuts against each moving contact through the abutting part, and the limiting part limits the movement of the support body in the Y-axis direction.

23. A relay according to claim 22, wherein the relay is a miniature relay. ​ 24. A relay according to claim 23, wherein the relay is a miniature relay. ​ 25. A relay according to claim 24, wherein the relay is a miniature relay. ​ 26. A relay according to claim 25, wherein the relay is a miniature relay. ​ 27. A relay according to claim 23, wherein the relay is a miniature relay. The reverse overcurrent part is arranged on the second static contact, the second static contact is further provided with a second static contact point, a fifth overcurrent part and a sixth overcurrent part; the second static contact point is fixed to the fifth overcurrent part; the sixth overcurrent part extends from the fifth overcurrent part along the Y-axis direction away from the moving contact group on the side of the first static contact along the X-axis direction; the reverse overcurrent part extends from the sixth overcurrent part along the Y-axis direction away from the fifth overcurrent part on the side of the first static contact along the X-axis direction; and the seventh overcurrent part extends from the reverse overcurrent part along the Y-axis direction.

28. A relay according to claim 20, wherein the relay is a miniature relay. The upper surface of the middle part of the bottom shell along the X-axis direction and the Y-axis direction is provided with a first guide part; the bottom surface of the push card is provided with a second guide part at the middle part along the X-axis direction and the Y-axis direction; the first guide part and the second guide part are in sliding fit along the Y-axis direction.

29. A relay according to claim 28, wherein the relay is a miniature relay. One of the first guide part and the second guide part is a guide groove extending along the Y-axis direction, and the other is a guide protrusion extending along the Z-axis direction, which is inserted into the guide groove and slides along the Y-axis direction relative to the guide groove.

30. A relay according to claim 20, wherein the relay is a miniature relay. The push card and the shell are fixed to the guide part or are in sliding fit with the guide part along the Y-axis direction.

31. A relay according to claim 30, wherein the relay is a miniature relay. The bottom shell is provided with a plurality of matching part groups corresponding to the guide part, each matching part group comprising at least two matching parts, and the matching parts in the same matching part group are arranged along the Y-axis direction; the position of the guide part in sliding fit with the push card or fixed to the push card is located between two matching parts of the corresponding matching part group along the Y-axis direction.

32. A relay according to claim 30, wherein the relay is a miniature relay. The number of the guide parts is two.

33. A relay according to claim 32, wherein the relay is a miniature relay. The two guide parts are respectively located on the two sides of the push card along the X-axis direction.

34. A relay according to claim 20, wherein the relay is a miniature relay. The micro switch is further provided with a moving spring and two fixed contact parts, the fixed contact parts are fixed to the bottom shell, the back surface of the connecting part away from the static contact group is provided with a pushing part, the moving spring is adapted to be pushed by the pushing part to deform to contact the fixed contact part, and to restore the deformation to move away from the fixed contact part when the pushing part moves away.

35. A relay according to claim 20, wherein the relay is a miniature relay. The elastic part is arranged on the bottom shell, and the elastic part stores energy when the moving contact group moves away from the static contact group and releases energy when the moving contact group moves towards the static contact group.

36. A relay according to claim 35, wherein the relay is a miniature relay. The number of the elastic parts is two, and the two elastic parts are respectively located on the two sides of the push card along the X-axis direction.

37. A relay according to claim 20, wherein the relay is a miniature relay. The bottom shell is provided with a plurality of contact cavities corresponding to the number of the moving contact groups, and the contact cavities are used for the corresponding moving contact groups to contact or move away from the static contact group; the partition part extends along the Y-axis direction; the partition part is made of insulating material and is located between adjacent contact cavities.

38. A relay according to claim 37, wherein the relay is a miniature relay. The partition part separates the adjacent contact cavities when the moving contact group contacts the static contact group.

39. A relay according to claim 20, wherein the relay is a miniature relay. The bottom shell is provided with a containing cavity, and the second magnetic group is contained in the containing cavity.

40. An electrical meter, characterized by The relay comprises the relay according to any one of claims 1 to 39.

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