Relay and electricity meter

Abstract

Disclosed in the present application are a relay and an electricity meter. The relay comprises a stationary contact member set and a movable contact member set, and further comprises a movable magnetizer set and a stationary magnetizer, wherein the movable magnetizer set is fixed relative to the movable contact member set and is disposed opposite to the stationary magnetizer in an X-axis direction; and the stationary magnetizer is fixed relative to one of components other than the movable contact member set and the movable magnetizer set, stationary contact points of two stationary contact members are respectively located on two sides of the stationary magnetizer in a Y-axis direction, the projections, on a second projection plane which is perpendicular to the Y-axis direction, of the parts of the stationary contact points that are suitable for making contact with the movable contact member set are all located in the projection of the stationary magnetizer on the second projection plane, and compared with all stationary contact points, the surface of the stationary magnetizer that faces the movable magnetizer set is closer to the movable magnetizer set in the X-axis direction. The electricity meter comprises the relay. By means of the technical solution, compared with a relay in the prior art, the relay is less prone to damage and has a longer service life.

Description

A relay and an electric meter TECHNICAL FIELD

[0001] The present application relates to the field of relays, in particular to a relay and an electric meter. BACKGROUND

[0002] In the prior art, there is a relay, which comprises a housing, a pusher, a contactor group and a spring group. The pusher is driven by an armature to move along a Y-axis direction. The contactor group comprises a movable contactor group and two stationary contactor groups, the stationary contactor groups are fixed to the housing and comprise two stationary contacts, the two stationary contacts are arranged along the Y-axis direction and are used to electrically connect with an external circuit, the movable contactor group is pushed by the pusher to close or disconnect with the stationary contactor groups along an X-axis direction, when the movable contactor group closes with the stationary contactor groups, the two stationary contacts are in conduction; when the movable contactor group disconnects with the stationary contactor groups, the two stationary contacts are in cut-off. The movable contactor group comprises at least one movable contact, the movable contact generally has a current bridge extending along the X-axis direction and two movable contact points fixed to the current bridge and arranged along the X-axis direction. The two movable contact points are arranged corresponding to the two stationary contacts. The stationary contact is provided with a stationary contact point corresponding to the movable contact point along the Y-axis direction. The spring group is generally arranged between the pusher and the contactor group, which stores energy when the movable contact abuts against the two stationary contacts, and releases energy when the movable contact is away from the two stationary contacts. By arranging the spring group, after the movable contact point experiences a contact stroke to abut against the corresponding stationary contact point, the pusher is further moved along the Y-axis direction and compresses the spring group, so as to have an overstroke. The advantage of this relay is that the safety distance between the movable contactor group and the stationary contactor group is twice the closing stroke of the movable contactor group, therefore, this relay has better voltage resistance. Here, the closing stroke refers to the distance between the movable contact point and the corresponding stationary contact point along the Y-axis direction when the movable contactor group is away from the stationary contactor group. The applicant finds that the relay with the above structure is easy to be damaged and has a short service life. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects or problems existing in the background art, and to provide a relay and an electric meter, wherein the relay is less likely to be damaged and has a longer service life compared with the relay in the prior art.

[0004] In order to achieve the above-mentioned purpose, the following technical solutions are adopted:

[0005] The first technical solution relates to a relay, which comprises a static contact group and a dynamic contact group, the static contact group comprises two static contacts, each of which is provided with a static contact point, and the static contact points of the two static contacts are arranged along the Y-axis direction; the dynamic contact group is closed or disconnected with the static contact group along the X-axis direction, so as to correspondingly turn on or turn off the electrical connection between the two static contacts; it also comprises a dynamic magnetic conductor group and a static magnetic conductor; the dynamic magnetic conductor group is fixed opposite to the dynamic contact group and is arranged opposite to the static magnetic conductor along the X-axis direction; the static magnetic conductor is fixed opposite to one of the other components except the dynamic contact group and the dynamic magnetic conductor group, and the static contact points of the two static contacts are respectively located on the two sides of the static magnetic conductor along the Y-axis direction; the projection of the part of all static contact points adapted to contact with the dynamic contact group on the second projection plane perpendicular to the Y-axis direction is located within the projection of the static magnetic conductor on the second projection plane, and the surface of the static magnetic conductor facing the dynamic magnetic conductor group is closer to the dynamic magnetic conductor group along the X-axis direction than all static contact points.

[0006] The second technical solution is based on the first technical solution, and further comprises a containing part, and the static contact group and the static magnetic conductor are fixed to the containing part.

[0007] The third technical solution is based on the first technical solution, wherein the dynamic contact group comprises a dynamic contact, and the dynamic contact comprises an overcurrent bridge and two dynamic contact points, the overcurrent bridge extends along the Y-axis direction, and the two dynamic contact points are fixed to the overcurrent bridge, the two dynamic contact points are arranged along the Y-axis direction and are opposite to the static contact points of the two static contacts along the X-axis direction.

[0008] The fourth technical solution is based on the third technical solution, wherein the dynamic magnetic conductor group comprises a dynamic magnetic conductor, the dynamic magnetic conductor is correspondingly arranged with the dynamic contact, the dynamic magnetic conductor is provided with a magnetic conductor body and an extension part, the magnetic conductor body extends along the Z-axis direction and is fixed to the back surface of the overcurrent bridge, and the extension part extends from the magnetic conductor body along the closing direction.

[0009] The fifth technical solution is based on the first technical solution, wherein at least one static contact is provided with a reverse flow part extending along the Y-axis direction, the overcurrent direction of the reverse flow part is opposite to the overcurrent direction of the overcurrent bridge; and the static magnetic conductor is located between the reverse flow part and the dynamic magnetic conductor group along the X-axis direction.

[0010] The sixth technical solution is based on the first technical solution, wherein the static contact point extends from the first surface of the static contact perpendicular to the X-axis direction, the static magnetic conductor is provided with a second surface perpendicular to the X-axis direction and facing away from the dynamic magnetic conductor group, and the second surface is closer to the dynamic magnetic conductor group along the X-axis direction than the first surface.

[0011] The seventh technical solution is based on the first technical solution, at least one static contact is provided with a cross flow part, the cross flow part is outside the dynamic contact group along the Y-axis direction and extends along the disconnection direction; when the dynamic contact group is closed with the static contact group, the magnetic field formed by the current passing through the cross flow part acts on the overcurrent bridge, and the magnetic force of the dynamic contact towards the static contact group is exerted on the dynamic contact.

[0012] The eighth technical solution is based on the second technical solution, and further comprises two blocking pieces, which are fixed to the accommodating piece and located outside the static contactor group along the Y-axis direction, each of the blocking pieces extends along the X-axis direction, so that the projection of the part of each static contact point adapted to contact the moving contact point on a second projection plane perpendicular to the Y-axis direction is located in the projection of each blocking piece on the second projection plane; the blocking piece is made of a high-temperature-resistant insulating material.

[0013] The ninth technical solution is based on the first technical solution, and further comprises a pushing piece, an elastic support group and a limiting piece; the pushing piece is used to drive the moving contactor group to move along the X-axis direction; the elastic support group is arranged on the pushing piece and located between the pushing piece and the moving contactor group along the X-axis direction; the limiting piece is fixed relative to the pushing piece and abuts against the moving contactor group along the disconnecting direction when the moving contactor group is disconnected from the static contactor group.

[0014] The tenth technical solution relates to an electric meter, which comprises the relay according to any one of the first to ninth technical solutions.

[0015] Compared with the prior art, the above-mentioned solutions have the following beneficial effects:

[0016] In the first technical solution, the projection of the part of each static contact point adapted to contact the moving contact point on a second projection plane perpendicular to the Y-axis direction is located in the projection of the static magnetic conductor on the second projection plane, and the surface of the static magnetic conductor facing the moving magnetic conductor group is closer to the moving magnetic conductor group along the X-axis direction than the static contact points. Therefore, when the moving contactor group is disconnected from the static contactor group to pull an electric arc, the magnetic field generated by the two-side electric arc is concentrated on the static magnetic conductor, so that the electric arc is not easy to spread along the Y-axis direction, the ablation of the electric arc escaping between the moving contact point and the static contact point to the surrounding accommodating piece is reduced, the relay is less likely to be damaged, and the service life is longer.

[0017] In the first technical solution, the moving magnetic conductor group and the static magnetic conductor form an anti-short-circuit magnetic loop when the moving contactor group overflows, so that the moving magnetic conductor group and the moving contactor group are subjected to a magnetic force along the closing direction, and the moving contactor group can be more reliably closed with the static contactor group. Since the magnetic force increases with the increase of the current, when the relay bears a fault large current, it is beneficial to avoid the moving contactor group from being disconnected from the static contactor group, thereby avoiding the destructive pull of the electric arc to cause damage to the relay.

[0018] In the first technical solution, the static contact points of the two static contactors are respectively located on the two sides of the static magnetic conductor along the Y-axis direction, so that the magnetic force formed by the anti-short-circuit magnetic loop of the static magnetic conductor and the moving magnetic conductor group on the moving contactor group is more balanced along the Y-axis direction, and the two moving contact points are not easy to be disconnected from the corresponding static contact points.

[0019] In the second technical solution, the static magnetic conductor and the static contactor group are fixed to the accommodating piece, so that the static magnetic conductor and the static contactor group are more easily installed.

[0020] In the third technical solution, the two movable contact points of the movable contact are arranged along the Y-axis direction and fixed to the overcurrent bridge extending along the Y-axis direction, so that the current passing through the overcurrent bridge flows along the Y-axis direction, facilitating the formation of a magnetic circuit for short-circuit resistance, and the short-circuit resistance magnetic circuit is used to make the movable contact group more reliably closed with the static contact group, thereby avoiding the movable contact group from being separated from the static contact group when the relay bears a fault large current, and thus avoiding the relay damage caused by destructive arc drawing.

[0021] In the fourth technical solution, the movable magnetic conductive body is correspondingly arranged with the movable contact, so that an anti-short-circuit magnetic circuit is formed around each movable contact, and each movable contact is less likely to be separated from the static contact group. The magnetic conductive body is fixed to the back of the overcurrent bridge, so that most of the magnetic field generated by the current of the overcurrent bridge is constrained in the anti-short-circuit magnetic circuit, improving the magnetic efficiency. The extension part extends from the magnetic conductive body along the closing direction, so that when the movable contact group is closed with the static contact group, the air gap between the movable magnetic conductive body and the static magnetic conductive body is smaller, the magnetic resistance of the anti-short-circuit magnetic circuit is smaller, and the movable contact group is less likely to be separated from the static contact group. Therefore, the movable contact group can be more reliably closed with the static contact group, and when the relay bears a fault large current, it is beneficial to avoid the movable contact group from being separated from the static contact group, thereby avoiding the relay damage caused by destructive arc drawing.

[0022] In the fifth technical solution, the overcurrent direction of the reflux part is opposite to the overcurrent direction of the overcurrent bridge, and the static magnetic conductive body is located between the reflux part and the movable magnetic conductive body group along the X-axis direction, so that the magnetic field generated by the reflux part due to overcurrent has the same magnetic induction line direction on the side where the static magnetic conductive body is located as the magnetic induction line direction formed by the anti-short-circuit magnetic circuit on the side where the static magnetic conductive body is located, thereby strengthening the magnetic field intensity of the static magnetic conductive body and making the magnetic force between the static magnetic conductive body and the movable magnetic conductive body group stronger. When the relay bears a fault large current, the movable contact group is less likely to be separated from the static contact group, thereby avoiding the relay damage caused by destructive arc drawing.

[0023] In the sixth technical solution, the second surface is closer to the movable magnetic conductive body group along the X-axis direction than the first surface, so that the static magnetic conductive body is not embedded between the portions of the two static contacts other than the static contact points along the Y-axis direction, thereby increasing the creepage distance between the static contact and the static magnetic conductive body and improving the voltage withstand capability of the relay.

[0024] In the seventh technical solution, the static contact is provided with a cross-flow part, which is located outside the movable contact group along the Y-axis direction and extends along the opening direction. The magnetic field generated by the current of the cross-flow part acts on the overcurrent bridge with the overcurrent direction being the Y-axis direction, generating a magnetic force on the overcurrent bridge towards the static contact group. This magnetic force makes the movable contact group more reliably closed with the static contact group, and since the magnetic force increases with the increase of the current, it is beneficial to avoid the movable contact group from being separated from the static contact group when the relay bears a fault large current, thereby avoiding the relay damage caused by destructive arc drawing.

[0025] In the eighth technical solution, the two blocking pieces are fixed to the accommodating piece and located outside the static contact piece group along the Y-axis direction, each blocking piece extends along the X-axis direction, so that the projection of the part of each static contact point adapted to contact the moving contact point on a second projection plane perpendicular to the Y-axis direction is located in the projection of each blocking piece on the second projection plane. Therefore, when the moving contact piece group is disconnected from the static contact piece group to pull the arc, the arc cannot be conducted to the two side walls of the accommodating piece along the Y-axis direction, ensuring the insulation performance of the accommodating piece. The blocking piece is made of high-temperature-resistant insulating material, which can prevent the heat of the arc from damaging the blocking piece when the load is large and a large amount of heat is generated by pulling the arc, avoiding damage to the blocking piece, and is beneficial to improve the load capacity of the relay.

[0026] In the ninth technical solution, the elastic support group is arranged between the pushing piece and the moving contact piece group, which can provide elastic force to the moving contact piece group along the closing direction after the pushing piece experiences overstroke, so that the moving contact piece group can be more reliably closed with the static contact piece group. When the relay bears a fault current, the moving contact piece group is less likely to be separated from the static contact piece group, thereby avoiding damage to the relay caused by destructive arc pulling. The elastic support group can also generate additional repulsive force when the moving contact piece group is disconnected from the static contact piece group, helping to disconnect the moving contact piece from the static contact piece group.

[0027] In the ninth technical solution, by arranging the limiting piece, the distance between the moving contact piece group and the static contact piece group when the moving contact piece group is disconnected from the static contact piece group can meet the design requirements. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments, the following briefly introduces the drawings needed to be used:

[0029] FIG. 1 is a perspective exploded view of a relay in embodiment one;

[0030] FIG. 2 is a top view of a housing in embodiment one;

[0031] FIG. 3 is a perspective view of a cover in embodiment one;

[0032] FIG. 4 is a perspective view of a static contact piece group in embodiment one;

[0033] FIG. 5 is a perspective view of a static magnetic conductor in embodiment one;

[0034] FIG. 6 is a top view of the static magnetic conductor in embodiment one;

[0035] FIG. 7 is a front view of a magnetic circuit part in embodiment one;

[0036] FIG. 8 is a top view of a coil assembly in embodiment one;

[0037] FIG. 9 is a top view of an armature assembly in embodiment one;

[0038] FIG. 10 is a right view of the armature assembly in embodiment one;

[0039] Fig. 11 is a perspective view of the shield in embodiment one;

[0040] Fig. 12 is a schematic view of the magnetic circuit portion in embodiment one when the armature assembly is in a magnetic holding state at the first position;

[0041] Fig. 13 is a schematic view of the magnetic circuit portion in embodiment one when the coil winding receives a first pulse electrical signal;

[0042] Fig. 14 is a schematic view of the magnetic circuit portion in embodiment one when the armature assembly moves to the second position;

[0043] Fig. 15 is a schematic view of the magnetic circuit portion in embodiment one when the armature assembly is in a magnetic holding state at the second position;

[0044] Fig. 16 is a schematic view of the magnetic circuit portion in embodiment one when the coil winding receives a second pulse electrical signal;

[0045] Fig. 17 is a schematic view of the magnetic circuit portion in embodiment one when the armature assembly moves to the first position;

[0046] Fig. 18 is a top view of the movable contact portion in embodiment one;

[0047] Fig. 19 is a front view of the pusher in embodiment one;

[0048] Fig. 20 is an exploded perspective view of the movable contact portion in embodiment one;

[0049] Fig. 21 is a right view of the limiting member in embodiment one;

[0050] Fig. 22 is a sectional view along A-A in Fig. 21;

[0051] Fig. 23 is a schematic view of the internal structure of the relay in embodiment one when the relay is in an off state;

[0052] Fig. 24 is a schematic view of the internal structure of the relay in embodiment one when the relay is in an on state;

[0053] Fig. 25 is a right view of the relay in embodiment one;

[0054] Fig. 26 is a sectional view along B-B in Fig. 25.

[0055] Main reference signs: 1, relay; 2, fixed part; 3, magnetic circuit part; 4, moving contact part; 5, micro switch; 6, accommodating member; 7, static contact piece group; 8, static magnetic conductor; 9, blocking member; 10, housing; 11, cover; 12, accommodating cavity; 13, sliding groove; 14, first groove segment; 15, second groove segment; 16, static magnetic conductor groove; 17, blocking member groove; 18, abutting surface; 19, static contact piece; 20, static contact point; 21, connecting terminal; 22, first static contact piece; 23, second static contact piece; 24, first overcurrent portion; 25, first static contact point; 26, second overcurrent portion; 27, third overcurrent portion; 28, fourth overcurrent portion; 29, fifth overcurrent portion; 30, sixth overcurrent portion; 27a, measurement terminal; 31, first connecting terminal; 32, seventh overcurrent portion; 33, second static contact point; 34, eighth overcurrent portion; 35, ninth overcurrent portion; 36, second connecting terminal; 37, coil assembly; 38, armature assembly; 39, shielding cover; 40, coil holder; 41, coil winding; 42, signal input terminal; 43, core; 44, yoke; 45, magnetic driving end; 46, first yoke; 47, second yoke; 48, first magnetic driving end; 49, second magnetic driving end; 50, permanent magnet; 51, armature; 52, first permanent magnet; 53, second permanent magnet; 54, magnetic pole; 55, first magnetic pole; 56, second magnetic pole; 57, first armature; 58, second armature; 59, mutually intersecting portions; 60, attraction portion; 61, first attraction portion; 62, second attraction portion; 63, third attraction portion; 64, fourth attraction portion; 65, first shielding member; 66, second shielding member; 67, partition wall; 68, connecting wall; 69, recess; 70, pushing member; 71, connecting member; 72, moving contact piece group; 73, moving magnetic conductor group; 74, elastic support group; 75, elastic member; 76, limiting member; 77, pushing body; 78, second guide portion; 79, accommodating portion; 80, first insert portion; 81, second insert portion; 82, connecting column; 83, moving spring; 84, connecting end; 85, moving contact piece; 86, overcurrent bridge; 87, moving contact point; 88, first moving contact point; 89, second moving contact point; 90, moving magnetic conductor; 91, magnetic conductor body; 92, extension portion; 93, elastic support; 94, frame body; 95, first elastic portion; 96, first connecting hole; 97, first elastic arm; 98, main body; 99, second elastic portion; 100, second connecting hole; 101, second elastic arm; 102, limiting body; 103, first guide portion; 104, limiting portion; 105, connecting portion; 106, avoiding hole; 107, assembly hole; 108, bending portion; 109, guide portion; 110, static contact terminal; F1, first magnetic force; M1, short-circuit-resistant magnetic circuit; M2, counter-flow magnetic field; S1, first surface; S2, second surface; W, interval; X1, closing direction; X2, opening direction. DETAILED DESCRIPTION

[0056] In the claims and specification except for the embodiments, the term "the static guide magnet is fixed relative to one of the other components except the moving contact group and the moving guide magnet" essentially means that the static guide magnet is fixed relative to the other components in front of the moving guide magnet along the closing direction, generally refers to the container or the static contact, and in special cases, can be fixed relative to the limiting piece.

[0057] In the claims and specification except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the features with one of the above directions are perpendicular to the features with another direction, and do not require that they must be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" introduced in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction. Among them, the X-axis direction can be divided into front and back, the left side is front and the right side is back in the specification drawing 23, the X-axis direction can also be divided into closing direction and opening direction, the closing direction refers to the movement direction of the moving contact group when moving to the closed state with the static contact group, that is, the direction from back to front, which is the direction from right to left in the specification drawing 23; the opening direction refers to the movement direction of the moving contact group when moving to the open state with the static contact group, that is, the direction from front to back, which is the direction from left to right in the specification drawing 23; the Y-axis direction can be divided into left and right, the upper side is left and the lower side is right in the specification drawing 23; the Z-axis direction can be divided into up and down.

[0058] In the claims and specification, unless otherwise defined, the terms "first", "second" or "third" and the like are used only to distinguish different objects, and are not used to describe a particular order.

[0059] In the claims and specification, unless otherwise defined, the terms "fixedly connected", "fixedly connected" or "fixed relative to" should be understood broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0060] In the claims and specification, unless otherwise defined, the terms "including", "having" and their variants mean "including but not limited to".

[0061] In the claims and specification, unless otherwise defined, the term "provided with" means that the technical feature located after it is part of the technical feature located before it.

[0062] In the claims and specification, unless otherwise defined, the term "group" means a set, which can include one element or multiple elements, for example, "the moving contact group" can include one moving contact or more than two moving contacts.

[0063] In the claims and specification, unless otherwise defined, the term "temporarily formed" means the polarity of the magnetic drive end formed by the pulsed electrical signal disappears with the disappearance of the pulsed electrical signal.

[0064] In the claims and specification, unless otherwise defined, the term "reversing" means the polarity of the magnetic drive end temporarily formed this time is opposite to the polarity of the magnetic drive end temporarily formed last time when the coil winding this time receives a pulsed electrical signal with a current direction different from the last time. Of course, those skilled in the art should understand that for a magnetic latching relay, if the coil assembly this time receives a pulsed electrical signal with a current direction same as the last time, the pulsed electrical signal received this time is meaningless for control, and the state of the relay will not change.

[0065] In the claims and specification, unless otherwise defined, the term "back surface" means the surface facing away from the static contact assembly.

[0066] In the claims and specification, unless otherwise defined, the term "mounted" means connected directly or indirectly to each other.

[0067] Embodiment One

[0068] The relay 1 is used to receive an electrical signal to control the on-off of an external circuit. Specifically, the relay 1 in this embodiment is a magnetic latching relay, which is used to receive a pulsed electrical signal to control the on-off of an external circuit. In this embodiment, the pulsed electrical signal can be divided into a first pulsed electrical signal and a second pulsed electrical signal. The first pulsed electrical signal is used to control the external circuit to turn on correspondingly, and the second pulsed electrical signal is used to control the external circuit to turn off correspondingly. After receiving the first pulsed electrical signal, the relay 1 switches from the off state to the on state, and after the first pulsed electrical signal disappears, the relay 1 remains in the on state until the second pulsed electrical signal is received; after receiving the second pulsed electrical signal, the relay 1 switches from the on state to the off state, and after the second pulsed electrical signal disappears, the relay 1 remains in the off state until the first pulsed electrical signal is received. In this embodiment, the external circuit is a single-phase alternating current circuit. The relay 1 needs to control the on-off of the single-phase alternating current circuit.

[0069] Referring to FIG. 1, FIG. 1 shows the structure of the relay 1 in this embodiment. As shown in FIG. 1, the relay 1 includes a fixed part 2, a magnetic circuit part 3, a moving contact part 4, and a micro switch 5. The parts of the fixed part 2 are fixed relative to each other and can serve as a movement reference for the moving contact part 4. The magnetic circuit part 3 is used to receive a pulsed electrical signal and drive the moving contact part 4 to move based on the pulsed electrical signal. The moving contact part 4 is driven by the magnetic circuit part 3 to move along the X-axis direction relative to the fixed part 2 to control the on-off of the external circuit. The micro switch 5 is used to send a relay state signal to an external relay state sensing circuit.

[0070] As shown in FIG. 1, the fixed part 2 comprises a housing 6, a static contact group 7, a static magnetic conductor 8 and a barrier 9.

[0071] As shown in FIG. 1, the housing 6 is made of plastic and comprises a shell 10 and a cover 11.

[0072] Referring to FIG. 2, the shell 10 in the embodiment is shown. As shown in FIG. 2, the shell 10 is provided with a cavity 12 which is open upward along the Z-axis direction and used for accommodating the static contact group 7, the static magnetic conductor 8, the barrier 9, the magnetic circuit part 3, the movable contact part 4 and the micro switch 5. The bottom wall of the shell 10 is provided with a sliding groove 13 in the middle along the Y-axis direction, the sliding groove 13 extends along the X-axis direction and is divided into a first groove section 14 and a second groove section 15. The first groove section 14 is located in front of the second groove section 15. In the embodiment, the first groove section 14 and the second groove section 15 of the shell 10 are separated from each other along the X-axis direction, and in other embodiments, the first groove section 14 and the second groove section 15 of the shell 10 can be arranged to be connected to each other along the X-axis direction. The front of the first groove section 14 is provided with a static magnetic conductor groove 16. The left and right sides of the first groove section 14 along the Y-axis direction are respectively provided with a barrier groove 17. The rear of the two barrier grooves 17 is respectively provided with an abutting surface 18 which is arranged forward.

[0073] Referring to FIG. 3, the cover 11 in the embodiment is shown. As shown in FIG. 3, the cover 11 is fixedly connected with the shell 10 and used for shielding the cavity 12. The cover 11 is also provided with a sliding groove 13 which extends along the X-axis direction and is divided into a first groove section 14 and a second groove section 15. The first groove section 14 of the cover 11 is arranged corresponding to the first groove section 14 of the shell 10 along the Z-axis direction. The second groove section 15 of the cover 11 is arranged corresponding to the second groove section 15 of the shell 10 along the Z-axis direction. In the embodiment, the first groove section 14 and the second groove section 15 of the cover 11 are separated from each other along the X-axis direction, and in other embodiments, the first groove section 14 and the second groove section 15 of the cover 11 can be arranged to be connected to each other along the X-axis direction.

[0074] Referring to FIG. 4, FIG. 23 and FIG. 26, the static contact group 7 in the embodiment is shown. The static contact group 7 is used to electrically connect with external circuit. The static contact group 7 comprises two static contacts 19. Each static contact 19 is provided with a static contact point 20 and a connecting terminal 21. The connecting terminal 21 is used to connect external circuit. One of the two connecting terminals 21 is used to connect power supply, and the other is used to connect load. When the two static contacts 19 are turned on, the power supply and the load are turned on; when the two static contacts 19 are turned off, the power supply and the load are turned off. Specifically, in the embodiment, the two static contacts 19 are respectively a first static contact 22 and a second static contact 23. The first static contact 22 is provided with a first overflow part 24, a first static contact point 25, a second overflow part 26, a third overflow part 27, a fourth overflow part 28, a fifth overflow part 29 and a sixth overflow part 30. The first overflow part 24 extends in the Z-axis direction perpendicular to the X-axis direction. The first overflow part 24 is provided with a first surface S1 facing backward in the X-axis direction. The first static contact point 25 is the static contact point 20 of the first static contact 22. The number of the first static contact point 25 is two, and the two first static contact points 25 are arranged in the Z-axis direction. The two first static contact points 25 extend backward in the X-axis direction from the first surface S1 of the first overflow part 24. The second overflow part 26 extends forward in the X-axis direction from the right side of the first overflow part 24 in the Y-axis direction. The third overflow part 27 extends right in the Y-axis direction from the front end of the second overflow part 26 in the X-axis direction, as shown in FIG. 23, the third overflow part 27 penetrates the accommodating part 6 right in the Y-axis direction. As shown in FIG. 4, the lower part of the third overflow part 27 in the Z-axis direction is provided with a measurement terminal 27a extending downward in the Z-axis direction, as shown in FIG. 26, the measurement terminal 27a extends out of the accommodating part 6 downward in the Z-axis direction. As shown in FIG. 4, the fourth overflow part 28 extends backward in the X-axis direction from the right side of the third overflow part 27 in the Y-axis direction. The fifth overflow part 29 extends right in the Y-axis direction from the rear end of the fourth overflow part in the X-axis direction. The sixth overflow part 30 extends backward in the X-axis direction from the right side of the fifth overflow part 29 in the Y-axis direction and from the lower part of the sixth overflow part in the Z-axis direction. In the embodiment, the part of the third overflow part 27 extending out of the accommodating part 6, the fourth overflow part, the fifth overflow part and the sixth overflow part constitute a first connecting terminal 31. The first connecting terminal 31 is the connecting terminal 21 of the first static contact 22. The second static contact 23 is provided with a seventh overflow part 32, a second static contact point 33, an eighth overflow part 34 and a ninth overflow part 35. The seventh overflow part 32 is provided with a first surface S1 (not marked in FIG. 4) facing backward in the X-axis direction. The first surface S1 of the seventh overflow part 32 and the first surface S1 of the first overflow part 24 are located in the same plane perpendicular to the X-axis. The second static contact point 33 is the static contact point 20 of the second static contact 23. The number of the second static contact point 33 is two, and the two second static contact points 33 are arranged in the Z-axis direction. The two second static contact points 33 extend backward in the X-axis direction from the first surface S1 of the seventh overflow part 32. The eighth overflow part 34 extends backward in the X-axis direction from the right side of the seventh overflow part 32 in the Y-axis direction.The ninth flow portion 35 extends rightward along the Y-axis direction from the rear end of the eighth flow portion along the X-axis direction and from the lower part of the eighth flow portion along the Z-axis direction. As shown in FIG. 23, the ninth flow portion 35 extends rightward along the Y-axis direction out of the housing 6. In this embodiment, the ninth flow portion 35 constitutes a second connecting terminal 36. The second connecting terminal 36 is a connecting terminal 21 of the second static magnetic conductor 23. The second connecting terminal 36 can be used to install a mutual inductor. In this embodiment, two connecting terminals 21 are arranged along the X-axis direction and each extends out of the housing 6 along the Y-axis direction.

[0075] Referring to FIGS. 5 and 6, the static magnetic conductor 8 in this embodiment is shown. As shown in FIG. 5, the static magnetic conductor 8 extends along the Z-axis direction. As shown in FIG. 6, the surface of the static magnetic conductor 8 facing forward along the X-axis direction forms a second surface S2. The second surface S2 is perpendicular to the X-axis direction.

[0076] Referring to FIG. 1, the barrier 9 in this embodiment is shown. In this embodiment, the number of barriers 9 is two. Each barrier 9 is in the shape of a sheet and extends along the X-axis direction, and has a size along the Z-axis direction. Therefore, the two barriers 9 are both perpendicular to the Y-axis direction. The barrier 9 is made of a high-temperature-resistant insulating material. In this embodiment, a ceramic material is used.

[0077] Referring to FIG. 7, the magnetic circuit portion 3 in this embodiment is shown. As shown in FIG. 7, the magnetic circuit portion 3 includes a coil assembly 37, an armature assembly 38, and a shield 39.

[0078] Referring to FIGS. 7 and 8, the coil assembly 37 in the present embodiment is shown. As shown in FIGS. 7 and 8, the coil assembly 37 includes a coil frame 40, a coil winding 41, signal input terminals 42, a core 43, and yokes 44. The coil frame 40 is fixed to the housing 10. The coil frame 40 extends along the Y-axis direction and is provided with a central hole extending along the Y-axis direction. The coil frame 40 is provided with a baffle at each end along the Y-axis direction. The coil winding 41 is wound on the coil frame 40 and located between the two baffles. The axis of the coil winding 41 extends along the Y-axis direction. The two connection terminals of the coil winding 41 are connected to the three signal input terminals 42, which are used to receive pulse electrical signals. The core 43 is located in the central hole of the coil frame 40 and extends along the Y-axis direction. The number of the yokes 44 is two. The two yokes 44 are fixed to the two sides of the core 43 along the Y-axis direction, respectively, and the ends of the two yokes 44 away from the core 43 form magnetic driving ends 45, respectively. The two magnetic driving ends 45 are arranged along the Y-axis direction and extend close to each other along the Y-axis direction. The two yokes 44 are a first yoke 46 and a second yoke 47, respectively. The two magnetic driving ends 45 are a first magnetic driving end 48 and a second magnetic driving end 49, respectively. The first magnetic driving end 48 is formed on the first yoke 46, and the second magnetic driving end 49 is formed on the second yoke 47. The coil winding 41 is excited by the pulse electrical signals to reverse the polarity temporarily formed by the two magnetic driving ends 45, so as to switch the different positions of the two armatures 51 in the X-axis direction and drive the armature assembly 38 to move along the X-axis direction. In the present embodiment, for the convenience of introduction, it is assumed that when the signal input terminals 42 receive a first pulse electrical signal, the coil winding 41 generates a first magnetic field, and the first magnetic driving end 48 temporarily has N-pole polarity, and the second magnetic driving end 49 temporarily has S-pole polarity. After the first pulse electrical signal disappears, the first magnetic field of the coil winding 41 disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated based on the first magnetic field; when the signal input terminals 42 receive a second pulse electrical signal with the current direction opposite to that of the first pulse electrical signal, the coil winding 41 generates a second magnetic field, and the polarity of the first magnetic driving end 48 reverses to have S-pole polarity, and the polarity of the second magnetic driving end 49 reverses to have N-pole polarity. After the second pulse electrical signal disappears, the second magnetic field of the coil winding 41 disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated based on the second magnetic field. The "temporarily formed" in the present embodiment refers to the polarity of the magnetic driving end 45 formed by the pulse electrical signal disappearing with the disappearance of the pulse electrical signal. The "reversal" in the present embodiment refers to that when the coil winding 41 receives the pulse electrical signal this time and the current direction of the pulse electrical signal is different from that of the pulse electrical signal received last time, the polarity of the magnetic driving end 45 temporarily formed this time is opposite to that of the magnetic driving end 45 temporarily formed last time.

[0079] Referring to FIG. 9 and FIG. 10, the armature assembly 38 in the embodiment is shown. The armature assembly 38 is driven by the coil assembly 37 to move along the X-axis direction between a first position and a second position. When the armature assembly 38 moves to the first position, the relay 1 is in an off state, and the external circuit is turned off. When the armature assembly 38 moves to the second position, the relay 1 is in an on state, and the external circuit is turned on. The first position is more rearward along the X-axis direction than the second position. As shown in FIG. 9 and FIG. 10, in the embodiment, the armature assembly 38 includes two permanent magnets 50 and two armatures 51. The two permanent magnets 50 are formed by magnetized magnetic steel, and in other embodiments, the two permanent magnets 50 can also use other permanent magnet materials, such as neodymium iron boron permanent magnets. In the embodiment, the two permanent magnets 50 are respectively a first permanent magnet 52 and a second permanent magnet 53. Each permanent magnet 50 is provided with two magnetic poles 54 with fixed polarity, and the two magnetic poles 54 are respectively a first magnetic pole 55 and a second magnetic pole 56. The first magnetic pole 55 and the second magnetic pole 56 have opposite polarities. For the convenience of introduction, it is assumed that the polarity of the first magnetic pole 55 is N-pole, and the polarity of the second magnetic pole 56 is S-pole. In the embodiment, the two magnetic poles 54 of each permanent magnet 50 are arranged along the X-axis direction. In the embodiment, the two permanent magnets 50 are arranged along the Y-axis direction. The first permanent magnet 52 is on the left side along the Y-axis direction, and the second permanent magnet 53 is on the right side along the Y-axis direction. The first magnetic pole 55 of the first permanent magnet 52 is in front along the X-axis direction, and the second magnetic pole 56 is in rear along the X-axis direction. The first magnetic pole 55 of the second permanent magnet 53 is in rear along the X-axis direction, and the second magnetic pole 56 is in front along the X-axis direction. The two armatures 51 are respectively a first armature 57 and a second armature 58. The first armature 57 is fixedly connected to the first magnetic poles 55 of the two permanent magnets 50. The second armature 58 is fixedly connected to the second magnetic poles 56 of the two permanent magnets 50. The projections of the two armatures 51 on a first projection plane perpendicular to the Z-axis direction intersect each other. The portions 59 where the two armatures 51 intersect each other form a spacing W along the Z-axis direction. Each armature 51 is provided with two attracting portions 60 on both sides along the Y-axis direction. The first armature 57 is provided with a first attracting portion 61 and a second attracting portion 62 on both sides along the Y-axis direction, the first attracting portion 61 is on the left side along the Y-axis direction and in front along the X-axis direction, and the second attracting portion 62 is on the right side along the Y-axis direction and in rear along the X-axis direction. The second armature 58 is provided with a third attracting portion 63 and a fourth attracting portion 64 on both sides along the Y-axis direction, the third attracting portion 63 is on the right side along the Y-axis direction and in front along the X-axis direction, and the fourth attracting portion 64 is on the left side along the Y-axis direction and in rear along the X-axis direction. Therefore, in the embodiment, the first attracting portion 61 and the third attracting portion 63 are arranged along the Y-axis direction, the fourth attracting portion 64 and the second attracting portion 62 are arranged along the Y-axis direction, the first attracting portion 61 and the fourth attracting portion 64 are arranged along the X-axis direction, and the third attracting portion 63 and the second attracting portion 62 are arranged along the X-axis direction. In the embodiment, the projection of the armature assembly 38 on the first projection plane is mirror symmetric with respect to a symmetry plane perpendicular to the Y-axis direction.

[0080] Referring to FIG. 7 and FIG. 11, the shielding cover 39 in the present embodiment is shown. As shown in FIG. 11, the shielding cover 39 comprises a first shielding member 65 and a second shielding member 66. The first shielding member 65 and the second shielding member 66 are inserted and fitted to form the shielding cover 39. The shielding cover 39 is provided with two shielding walls 67 and a connecting wall 68. Each of the shielding walls 67 is provided with a groove 69 at the front end thereof along the X-axis direction, the groove 69 extending along the X-axis direction and being located at the middle of the shielding wall 67 along the Y-axis direction. As shown in FIG. 7, the two shielding walls 67 are both arranged perpendicularly to the Z-axis direction. The two shielding walls 67 are arranged above and below the coil assembly 37 along the Z-axis direction. The connecting wall 68 is arranged perpendicularly to the X-axis direction and is used to connect the two shielding walls 67. The connecting wall 68 is arranged behind the coil assembly 37 along the X-axis direction.

[0081] Referring to FIG. 12 to FIG. 17, the operation principle of the magnetic circuit part 3 in the present embodiment is shown.

[0082] As shown in FIG. 12, in the present embodiment, the armature assembly 38 is located between the arms of the two yokes 44 extending along the X-axis direction along the Y-axis direction. The first magnetic driving end 48 is located between the first attracting portion 61 and the fourth attracting portion 64 along the X-axis direction; the second magnetic driving end 49 is located between the third attracting portion 63 and the second attracting portion 62 along the X-axis direction.

[0083] Fig. 12 shows the state of the magnetic circuit portion 3 when the armature assembly 38 is in the magnetic holding state at the first position in the present embodiment. As shown in Fig. 12, when the armature assembly 38 is in the magnetic holding state at the first position, the first attraction portion 61 attracts the first magnetic driving end 48, and the third attraction portion 63 attracts the second magnetic driving end 49. At this time, the magnetic circuit portion 3 forms two closed magnetic circuits, i.e., a first closed magnetic circuit and a second closed magnetic circuit. The first closed magnetic circuit passes from the first magnetic pole 55 of the first permanent magnet 52, through the first attraction portion 61, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, the second magnetic driving end 49, the third attraction portion 63, the portion 59 where the first and second armatures 57, 58 cross each other, the second magnetic pole 56 of the first permanent magnet 52, back to the first magnetic pole 55 of the first permanent magnet 52, without any air gap in between, and through the entire coil assembly 37. The second closed magnetic circuit passes from the first magnetic pole 55 of the second permanent magnet 53, through the portion 59 where the first and second armatures 57, 58 cross each other, the first attraction portion 61, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, the second magnetic driving end 49, the third attraction portion 63, the second magnetic pole 56 of the second permanent magnet 53, back to the first magnetic pole 55 of the second permanent magnet 53, without any air gap in between, and through the entire coil assembly 37. Therefore, when the armature assembly 38 is in the magnetic holding state at the first position, due to the existence of the first and second closed magnetic circuits and the superposition effect between them, a greater magnetic attraction force is generated between the first attraction portion 61 and the first magnetic driving end 48, and between the third attraction portion 63 and the second magnetic driving end 49, so that the armature assembly 38 is held at the first position relative to the coil assembly 37.

[0084] Fig. 13 shows the state of the magnetic circuit part 3 when the coil assembly 37 just receives the first pulse electric signal in the present embodiment. As shown in Fig. 13, at this time, the coil winding 41 is excited by the first pulse electric signal to generate the first magnetic field, so that the first magnetic driving end 48 temporarily has the N-pole polarity and the second magnetic driving end 49 temporarily has the S-pole polarity. Since the first magnetic driving end 48 and the first attraction part 61 have the same N-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the first attraction part 61. Since the second magnetic driving end 49 and the third attraction part 63 have the same S-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the third attraction part 63. In addition, the magnetic circuit part 3 at this time forms two push magnetic circuits, i.e. a first push magnetic circuit and a second push magnetic circuit. The first push magnetic circuit passes through the entire coil assembly 37 from the first magnetic driving end 48, through the stroke air gap, the fourth attraction part 64, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the portion 59 where the first armature 57 intersects with each other, the second attraction part 62, the stroke air gap, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, and returns to the first magnetic driving end 48, with only two stroke air gaps in the middle. The second push magnetic circuit also passes through the entire coil assembly 37 from the first magnetic driving end 48, through the stroke air gap, the fourth attraction part 64, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second attraction part 62, the stroke air gap, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, and returns to the first magnetic driving end 48, with only two stroke air gaps in the middle. Therefore, when the coil assembly 37 just receives the first pulse electric signal, not only the first magnetic driving end 48 generates the magnetic repulsion force to the first attraction part 61 and the second magnetic driving end 49 generates the magnetic repulsion force to the third attraction part 63, but also the first magnetic driving end 48 generates the magnetic attraction force to the fourth attraction part 64 and the second magnetic driving end 49 generates the magnetic attraction force to the second attraction part 62 due to the existence of the first push magnetic circuit and the second push magnetic circuit and the superposition effect between them, so that the coil assembly 37 can generate a stronger pushing force to the armature assembly 38 to push the armature assembly 38 to move from the first position to the second position along the closing direction X1.

[0085] Fig. 14 shows the state of the magnetic circuit part 3 when the armature assembly 38 is driven by the coil assembly 37 to move to the second position in the closing direction X1 in the present embodiment. As shown in Fig. 14, when the armature assembly 38 just moves to the second position, the first pulse electric signal and the first magnetic field have not disappeared yet, the first magnetic driving end 48 still temporarily has the N-pole polarity, and the second magnetic driving end 49 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 forms two closed magnetic circuits, i.e., a third closed magnetic circuit and a fourth closed magnetic circuit. The third closed magnetic circuit is from the first magnetic driving end 48, through the fourth attraction portion 64, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the portion 59 where the first armature 57 intersects with each other, the second attraction portion 62, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, back to the first magnetic driving end 48, without any air gap in the middle, and passes through the entire coil assembly 37. The fourth closed magnetic circuit is from the first magnetic driving end 48, through the fourth attraction portion 64, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second attraction portion 62, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, back to the first magnetic driving end 48, without any air gap in the middle, and passes through the entire coil assembly 37. Therefore, when the armature assembly 38 just moves to the second position, due to the existence of the third closed magnetic circuit and the fourth closed magnetic circuit and the superposition effect between the two, a greater magnetic attraction force is generated between the first magnetic driving end 48 and the fourth attraction portion 64 and between the second magnetic driving end 49 and the second attraction portion 62.

[0086] Fig. 15 shows the state of the magnetic circuit part 3 when the armature assembly 38 is in the magnetic holding state at the second position in the present embodiment. As shown in Fig. 15, when the first pulse electric signal disappears, the first magnetic field disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated by the first magnetic field. At this time, the third closed magnetic circuit and the fourth closed magnetic circuit described above still exist, wherein the third closed magnetic circuit can be regarded as starting from the first magnetic pole 55 of the first permanent magnet 52, and its path is the same as that of the third closed magnetic circuit shown in Fig. 14; the fourth closed magnetic circuit can be regarded as starting from the first magnetic pole 55 of the second permanent magnet 53, and its path is the same as that of the fourth closed magnetic circuit shown in Fig. 14. And the third closed magnetic circuit and the fourth closed magnetic circuit superimpose on each other, so that a greater magnetic attraction force is generated between the fourth attraction portion 64 and the first magnetic driving end 48 and between the second attraction portion 62 and the second magnetic driving end 49, and the armature assembly 38 is kept at the second position relative to the coil assembly 37.

[0087] Fig. 16 shows the state of the magnetic circuit portion 3 when the coil assembly 37 just receives the second pulse electric signal in the present embodiment. As shown in Fig. 16, at this time, the coil winding 41 is excited by the second pulse electric signal to generate the second magnetic field, so that the first magnetic driving end 48 temporarily has the S-pole polarity and the second magnetic driving end 49 temporarily has the N-pole polarity. Since the first magnetic driving end 48 and the fourth attraction portion 64 have the same S-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction portion 64; since the second magnetic driving end 49 and the second attraction portion 62 have the same N-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction portion 62. In addition, the magnetic circuit portion 3 at this time forms two push magnetic circuits, i.e. the third push magnetic circuit and the fourth push magnetic circuit. The third push magnetic circuit passes through the entire coil assembly 37 from the second magnetic driving end 49, through the stroke air gap, the third attraction portion 63, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the first attraction portion 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, and only has two stroke air gaps in the middle. The fourth push magnetic circuit also passes through the entire coil assembly 37 from the second magnetic driving end 49, through the stroke air gap, the third attraction portion 63, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the portion 59 where the first armature 57 intersects with each other, the first attraction portion 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, and only has two stroke air gaps in the middle. Therefore, when the coil assembly 37 just receives the second pulse electric signal, not only the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction portion 64 and the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction portion 62, but also the first magnetic driving end 48 generates the magnetic attraction force to the first attraction portion 61 and the second magnetic driving end 49 generates the magnetic attraction force to the third attraction portion 63 due to the existence of the third push magnetic circuit and the fourth push magnetic circuit and the superposition effect between them, so that the coil assembly 37 can generate a stronger pushing force to the armature assembly 38 to push the armature assembly 38 to move from the second position to the first position along the breaking direction X2.

[0088] Fig. 17 shows the state of the magnetic circuit part 3 when the armature assembly 38 is driven by the coil assembly 37 to move in the breaking direction X2 to the first position in the present embodiment. As shown in Fig. 17, when the armature assembly 38 just moves to the first position, the second pulse electric signal and the second magnetic field have not disappeared yet, the first magnetic driving end 48 still temporarily has the S-pole polarity, and the second magnetic driving end 49 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 still has the first closed magnetic circuit and the second closed magnetic circuit shown in Fig. 12, wherein the first closed magnetic circuit can be regarded as starting from the second magnetic driving end 49 and having the same path as that of the first closed magnetic circuit shown in Fig. 12, and the second closed magnetic circuit can be regarded as starting from the second magnetic driving end 49 and having the same path as that of the second closed magnetic circuit shown in Fig. 12. Therefore, when the armature assembly 38 just moves to the first position, due to the existence of the first closed magnetic circuit and the second closed magnetic circuit and the superposition effect between them, a greater magnetic attraction force is generated between the first magnetic driving end 48 and the first attraction part 61 and between the second magnetic driving end 49 and the third attraction part 63.

[0089] When the second pulse electric signal disappears, the second magnetic field disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 38 is in the magnetic holding state at the first position as shown in Fig. 12.

[0090] Referring to Fig. 18, Fig. 18 shows the movable contact part 4 in the present embodiment. As shown in Fig. 18, the movable contact part 4 includes a pushing piece 70, a connecting piece 71, a movable contact piece group 72, a movable magnetic conductor group 73, an elastic support piece group 74, an elastic piece 75, and a limiting piece 76.

[0091] Referring to FIG. 19, FIG. 19 shows the pusher 70 and the connecting piece 71 in the present embodiment. As shown in FIG. 19, in the present embodiment, the armature assembly 38, the connecting piece 71 and the moving spring 83 are fixedly connected with the pusher 70, specifically, the armature assembly 38, the connecting piece 71 and the moving spring 83 are integrally formed with the pusher 70 by insert injection molding. The pusher 70 is made of plastic. The pusher 70 is provided with a pusher body 77 and two second guide portions 78. The pusher body 77 is provided with a receiving portion 79, a first insert portion 80 and a second insert portion 81. The receiving portion 79 is used for accommodating the armature assembly 38. The first insert portion 80 is used for accommodating the connecting piece 71 and is located in front of the receiving portion 79 along the X-axis direction. The front surface of the first insert portion 80 is provided with two connecting columns 82. The two connecting columns 82 are arranged along the Z-axis direction. Each connecting column 82 extends forward from the front surface of the first insert portion 80 along the X-axis direction. The second insert portion 81 is used for accommodating the moving spring 83 and is located behind the receiving portion 79 along the X-axis direction. The moving spring 83 is part of the micro switch 5, which will be described later. The two second guide portions 78 extend away from each other along the Z-axis direction from the pusher body 77. In the present embodiment, the two second guide portions 78 extend away from each other along the Z-axis direction from the upper surface and the lower surface of the receiving portion 79 along the Z-axis direction, respectively, and the second guide portions 78 are arranged at the middle part of the receiving portion 79 along the Y-axis direction and the middle part of the receiving portion 79 along the X-axis direction. The projection of each second guide portion 78 on a first projection plane perpendicular to the Z-axis direction is circular.

[0092] As shown in FIG. 19, the connecting piece 71 extends along the Z-axis direction, and the two ends thereof along the Z-axis direction respectively extend out of the first insert portion 80 to form two connecting ends 84.

[0093] Referring to FIG. 20, FIG. 20 shows the moving contact set 72, the moving magnet set 73, the elastic support set 74 and the elastic member 75 in the present embodiment. The moving contact set 72 is driven to close or open with the stationary contact set 7 along the X-axis direction by the armature assembly 38 and the pusher 70 integrally formed with the armature assembly 38 by insert injection molding, so as to correspondingly turn on or turn off the electrical connection between the two stationary contacts 19. As shown in FIG. 20, the moving contact set 72 includes two moving contacts 85. The two moving contacts 85 are arranged along the Z-axis direction. Each moving contact 85 is provided with an overcurrent bridge 86 and two moving contact points 87. The overcurrent bridge 86 extends along the Y-axis direction. The two moving contact points 87 are arranged along the Y-axis direction and fixed to the overcurrent bridge 86, and each moving contact point 87 is arranged opposite to the corresponding stationary contact 20 along the X-axis direction and towards the front. Specifically, the moving contact point 87 opposite to the first stationary contact 25 along the X-axis direction is a first moving contact point 88; and the moving contact point 87 opposite to the second stationary contact 33 along the X-axis direction is a second moving contact point 89. When the moving contact set 72 is closed with the stationary contact set 7, each first moving contact point 88 abuts against the corresponding first stationary contact 25 along the X-axis direction, each second moving contact point 89 abuts against the corresponding second stationary contact 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned on through the two moving contacts 85. When the moving contact set 72 is opened with the stationary contact set 7, each first moving contact point 88 is away from the corresponding first stationary contact 25 along the X-axis direction, each second moving contact point 89 is away from the corresponding second stationary contact 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned off.

[0094] The moving magnet set 73 is fixed opposite to the moving contact set 72 and arranged opposite to the stationary magnet 8 along the X-axis direction. As shown in FIG. 20, the moving magnet set 73 includes a moving magnet 90, which is arranged opposite to the moving contact 85. In the present embodiment, the number of the moving magnet 90 is two, and the two moving magnets 90 are arranged along the Z-axis direction. Each moving magnet 90 is provided with a magnet body 91 and two extension parts 92. The magnet body 91 extends along the Z-axis direction and is fixed to the back surface of the overcurrent bridge 86, where the “back surface” refers to the surface facing away from the stationary contact set 7. The extension part 92 extends forward along the X-axis direction from the two ends of the magnet body 91 along the Z-axis direction.

[0095] The elastic support set 74 is arranged on the pushing member 70 and located between the pushing member 70 and the movable contact set 72 along the X-axis direction. As shown in FIG. 20, the elastic support set 74 includes elastic supports 93. In the embodiment, the number of the elastic supports 93 is two and arranged along the Z-axis direction. The elastic support 93 is provided with a support body 94 and a first elastic part 95. The support body 94 is fixed relative to the pushing member 70. Specifically, the support body 94 is provided with two first connecting holes 96 corresponding to the connecting columns 82. The connecting columns 82 pass through the first connecting holes 96 so that the support body 94 is positioned relative to the pushing member 70 along any direction perpendicular to the X-axis direction. The first elastic part 95 is adapted to elastically deform along the X-axis direction. The first elastic part 95 is arranged corresponding to the movable contact 85. The movable contact 85 is fixedly connected to the corresponding first elastic part 95. In the embodiment, each first elastic part 95 includes two first elastic arms 97. One end of the first elastic arm 97 is integrated with the support body 94. The other end of the first elastic arm 97 is fixedly connected to the overcurrent bridge 86. The position where the first elastic arm 97 is fixedly connected to the back of the overcurrent bridge 86 corresponds to the position of the movable contact 87.

[0096] The elastic member 75 is adapted to abut against the accommodating member 6. The elastic member 75 deforms to store energy when the pushing member 70 moves along the disconnecting direction X2 and restores deformation to release energy when the pushing member 70 moves along the closing direction X1. As shown in FIG. 20, the elastic member 75 is provided with a main body 98 and a second elastic part 99. The main body 98 is in the shape of a sheet perpendicular to the X-axis direction and is fixed relative to the pushing member 70. Specifically, the main body 98 is provided with two second connecting holes 100 corresponding to the connecting columns 82. The connecting columns 82 pass through the second connecting holes 100 so that the main body 98 is positioned relative to the pushing member 70 along any direction perpendicular to the X-axis direction. The main body 98 is located between the support body 94 and the first insert part 80 along the X-axis direction. The second elastic part 99 is adapted to elastically deform along the X-axis direction. The second elastic part 99 is arranged corresponding to the movable contact 85 in the movable contact set 72. The second elastic part 99 includes two second elastic arms 101. One end of each second elastic arm 101 is integrated with the main body 98. The other end of each second elastic arm 101 extends to the two sides of the Y-axis direction and is adapted to abut against the corresponding abutting surface 18.

[0097] Referring to FIG. 21 and FIG. 22, the limit member 76 in the embodiment is shown. The limit member 76 is fixed relative to the push member 70 and abuts against the movable contact group 72 rearward when the movable contact group 72 is disconnected from the stationary contact group 7, so as to limit the distance between the movable contact group 72 and the stationary contact group 7. As shown in FIG. 21 and FIG. 22, the limit member 76 is provided with a limit body 102 and two first guide portions 103. The limit body 102 is made of metal. The limit body 102 is provided with a limit portion 104 and two connecting portions 105. The limit portion 104 is adapted to abut against each movable contact 85 in the movable contact group 72. The limit portion 104 extends along the Z-axis direction and is provided with three avoiding holes 106 for the extension portion 92 of each movable magnetic conductor 90 to extend forward along the X-axis direction. The two connecting portions 105 extend rearward along the Z-axis direction from the two ends of the limit portion 104, respectively. The connecting portion 105 is provided with a mounting hole 107 for cooperation and fixation with the connecting end 84 and a bent portion 108 for mounting the first guide portion 103. The bent portion 108 extends along the Z-axis direction from the front end of the connecting portion 105 along the closing direction X1. The extension directions of the bent portions 108 of the two connecting portions 105 are away from each other. The two first guide portions 103 are arranged along the Z-axis direction and located at the ends of the bent portions 108 along the Z-axis direction away from each other. The first guide portion 103 is made of plastic. The two first guide portions 103 are integrally formed with the limit body 102 by insert injection molding, and the first guide portion 103 wraps the corresponding bent portion 108. In the embodiment, the first guide portion 103 is located at the front end of the limit member 76 along the closing direction X1 along the X-axis direction and at the middle of the limit member 76 along the Y-axis direction. In the embodiment, the first guide portion 103 and the second guide portion 78 are both guide portions 109. The guide portion 109 is used for guiding the movement of the movable contact part 4 along the X-axis direction.

[0098] Referring to FIG. 1, the micro switch 5 in the embodiment is shown. As shown in FIG. 1, in the embodiment, the micro switch 5 includes the movable spring 83 and two stationary contact terminals 110. The stationary contact terminal 110 extends along the Z-axis direction and extends out of the accommodating member 6. The two stationary contact terminals 110 are arranged along the Y-axis direction and located between the movable spring 83 and the coil winding 41 along the X-axis direction. The two stationary contact terminals 110 are used for electrical connection with the relay state sensing circuit. The movable spring 83 is fixed with the push member 70. In the embodiment, the movable spring 83 is integrally formed with the push member 70 by insert injection molding and located in the second insert portion 81. The movable spring 83 is provided with two abutting arms extending away from each other along the Y-axis direction. The movable spring 83 is driven by the push member 70 to move along the X-axis direction, so that the abutting arms abut against or are away from the two stationary contact terminals 110. In other embodiments, when the movable spring 83 is not fixed with the push member 70, the movable spring 83 can also be away from the two stationary contact terminals based on the elastic restoring force of the movable spring 83 itself.

[0099] Referring to FIG. 23 and FIG. 26, the internal structure of the relay 1 in the embodiment is shown.

[0100] As shown in FIG. 23, in the embodiment, the magnetic circuit part 3 and the movable contact part 4 are arranged in the accommodating cavity 12. The two static contacts 19 of the static contact group 7 are fixed to the accommodating member 6, so that the static contact points 20 of the two static contacts 19 are arranged along the Y-axis direction, and the connecting terminals 21 of the two static contacts 19 are arranged along the X-axis direction and protrude out of the accommodating member 6 along the Y-axis direction. The second connecting terminals 35 of the second static contacts 23 are located along the X-axis direction between the static contact points 20 and the coil winding 41. The eighth overcurrent part 34 is located along the Y-axis direction outside the movable contact group 72 and outside the right barrier 9. The static flux guide 8 is inserted into the static flux guide slot 16 and fixed to the accommodating member 6. The first static contact point 25 and the second static contact point 33 are located along the Y-axis direction on two sides of the static flux guide 8, respectively. The projection of the part of all the static contact points 20 adapted to contact the movable contact group 72 on the second projection plane perpendicular to the Y-axis direction is located within the projection of the static flux guide 8 on the second projection plane, and the surface of the static flux guide 8 facing the movable flux guide group 73 is closer to the movable flux guide group 73 along the X-axis direction than all the static contact points 20. The second surface S2 is closer to the movable flux guide group 73 than the first surface S1. The static flux guide 8 is oppositely arranged along the X-axis direction to the movable flux guide group 73. The static flux guide 8 is located along the X-axis direction between the third overcurrent part 27 and the movable flux guide group 73. In other embodiments, the static flux guide 8 can also be fixed relative to the limiting member 76 and can play the same role. The two barriers 9 are respectively inserted into the corresponding barrier slots 17 and fixed to the accommodating member 6, so that the two barriers 9 are located along the Y-axis direction outside the static contact group 7. The first magnetic driving end 48 is located along the X-axis direction between the first attraction part 61 and the fourth attraction part 64. The second magnetic driving end 49 is located along the X-axis direction between the third attraction part 63 and the second attraction part 62. Each first movable contact point 88 is oppositely arranged along the X-axis direction to the corresponding first static contact point 25, and each second movable contact point 89 is oppositely arranged along the X-axis direction to the corresponding second static contact point 33. The limiting member 76 is fixed to the connecting member 71 to be fixed relative to the pushing member 70. The limiting member 76 is adapted to abut against the movable contact group 72 along the disconnection direction X2. The elastic member 75 is adapted to abut against the accommodating member 6. The first guide part 103 and the second guide part 78 are both centrally located along the Y-axis direction between the first movable contact point 88 and the second movable contact point 89.

[0101] As shown in FIG. 26, the shell 10 and the cover 11 are fixed to form the accommodating member 6. The shielding cover 39 is placed in the accommodating member 6. The first guide part 103 located at the upper part along the Z-axis direction extends into the first slot section 14 of the slide groove 13 of the cover 11 along the Z-axis direction. The second guide part 78 located at the upper part along the Z-axis direction extends into the second slot section 15 of the slide groove 13 of the cover 11 along the Z-axis direction. The first guide part 103 located at the lower part along the Z-axis direction extends into the first slot section 14 of the slide groove 13 of the shell 10 along the Z-axis direction. The second guide part 78 located at the lower part along the Z-axis direction extends into the second slot section 15 of the slide groove 13 of the shell 10 along the Z-axis direction. Thus, each guide part 109 extends into the corresponding slide groove 13 along the Z-axis direction and is in sliding fit with the slide groove 13 along the X-axis direction. In the embodiment, the guide parts 109 are arranged on the movable contact part 4, and the slide grooves 13 are arranged on the accommodating member 6. In other embodiments, the guide parts 109 can be arranged on the accommodating member 6, and the slide grooves 13 can be arranged on the movable contact part 4.

[0102] Referring to FIG. 23, FIG. 23 shows the state of the relay 1 when the armature assembly 38 is located at the first position. As shown in FIG. 23, when the armature assembly 38 is located at the first position, the movable contact group 72 is disconnected from the stationary contact group 7 along the disconnecting direction X2, the relay 1 is in the off state, and the external circuit is disconnected. At this time, the elastic member 75 is in contact with the abutting surface 18 along the disconnecting direction X2, so that the elastic member 75 is deformed to store energy. The limiting member 76 abuts against the movable contact group 72 along the disconnecting direction X2, each movable contact 85 abuts against the elastic support group 74, and the support body 94 of the elastic support 93 and the main body 98 of the elastic member 75 are fixed relative to the push member 70 along the X-axis direction, so that the support body 94 and the elastic member 75 are fixed relative to the push member 70. The movable spring 83 abuts against the two stationary contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the off state.

[0103] When the coil assembly 37 drives the armature assembly 38 to move along the closing direction X1 after the coil winding 41 receives the first pulse electrical signal, the armature assembly 38 drives the movable contact part 4 to move along the closing direction X1. During the process, the guide part 109 slides in the slide groove 13 along the closing direction X1 and guides the movable contact part 4. The elastic member 75 restores the deformation to release the energy. When the movable contact 87 abuts against the corresponding stationary contact 20, the push member 70 enters the overstroke, at this time, the elastic support group 74 is deformed to store energy until the armature assembly 38 reaches the second position, and the movable contact group 72 is connected with the stationary contact group 7.

[0104] Referring to FIG. 24 and FIG. 26, FIG. 24 and FIG. 26 show the state of the relay 1 when the armature assembly 38 is in the second position. As shown in FIG. 24, when the armature assembly 38 is in the second position, the movable contact group 72 is closed with the stationary contact group 7 in the closing direction X1, the relay 1 is in the on state, and the external circuit is turned on. The third overcurrent portion 27 of the first stationary contact 22 forms a reverse current portion, and the overcurrent direction of the reverse current portion is opposite to the overcurrent direction of the overcurrent bridge 86. The eighth overcurrent portion 34 of the second stationary contact 23 forms a cross current portion, and the overcurrent direction of the cross current portion is the opening direction X2 when the overcurrent direction of the overcurrent bridge 86 is along the Y axis direction to the right and the cross current portion is located on the right side of the overcurrent bridge 86. The magnetic field formed by the current passing through the cross current portion acts on the overcurrent bridge 86 with current passing through, so that the overcurrent bridge 86 is subjected to the first magnetic force F1 towards the stationary contact group 7. The elastic support group 74 is deformed to store energy along the X axis direction. The elastic member 75 is deformed away from the abutting surface 18 along the X axis direction. The movable spring 83 is away from the two stationary contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the on state. As shown in FIG. 26, the current passing through the overcurrent bridge 86 forms an anti-short circuit magnetic loop M1 between the movable magnetic conductor 90 and the stationary magnetic conductor 8. In this embodiment, the number of anti-short circuit magnetic loops M1 is two. At the same time, the reverse current magnetic field M2 formed by the current passing through the reverse current portion formed by the third overcurrent portion 27 is in the same direction as the magnetic induction line formed by the anti-short circuit magnetic loop M1 on one side of the stationary magnetic conductor 8.

[0105] When the coil assembly 37 drives the armature assembly 38 to move in the opening direction X2 after the coil winding 41 receives the second pulse electrical signal, the armature assembly 38 drives the movable contact part 4 to move in the opening direction X2. In this process, the guide portion 109 slides in the sliding groove 13 in the opening direction X2 and guides the movable contact part 4. The elastic support group 74 restores the deformation to release energy. The elastic member 75 is deformed to store energy after abutting against the abutting surface 18. Until it returns to the state shown in FIG. 23 that the armature assembly 38 is in the first position.

[0106] The electric meter (not shown in the figure) in this embodiment uses the above-mentioned relay 1.

[0107] In this embodiment, the stationary contact points 20 of the two stationary contacts 19 are arranged along the Y axis direction, and the movable contact group 72 is closed or opened with the stationary contact group 7 along the X axis direction to correspondingly turn on or off the electrical connection between the two stationary contacts 19. Under this structure, the safety distance between the movable contact group 72 and the stationary contact group 7 is twice the actual distance between the movable contact 87 and the corresponding stationary contact 20 along the X axis direction, so the relay 1 has higher safety and stronger load capacity, which is more conducive to improving the safety distance between the movable contact group 72 and the stationary contact group 7.

[0108] In the embodiment, the static contact 20 of the two static contact pieces 19 is arranged along the Y-axis direction, and the connecting terminal 21 of the two static contact pieces 19 is arranged along the X-axis direction and extends out of the accommodating member 6 along the Y-axis direction. Compared with the static contact piece 19 extending out of the accommodating member 6 along the movement direction of the moving contact piece group 72, the size in the X-axis direction is shortened, and the space in the Y-axis direction is effectively utilized. Therefore, the size of the relay 1 in the X-axis direction and the size in the Y-axis direction are well balanced, which can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0109] In the embodiment, on the basis of retaining the coil assembly of the swing type magnetic latching relay, the two armatures 51 fixed with the permanent magnet 50 in the armature assembly 38 are improved from parallel arrangement to cross each other, so that the armature assembly 38 is converted from swing relative to the coil assembly 37 to linear motion relative to the coil assembly 37. Since the armature assembly 38 moves linearly relative to the coil assembly 37, there is no loss of the radial component of the swing stroke of the swing type magnetic latching relay. Therefore, the space utilization rate of the relay 1 can be higher, which can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0110] In the embodiment, since the axis of the coil winding 41 extends along the Y-axis direction and the two magnetic driving ends 45 are arranged along the Y-axis direction, and the linear motion direction of the armature assembly 38 is the X-axis direction perpendicular to the Y-axis direction, such layout is beneficial to leaving space for the movement of the armature assembly 38 and the moving contact piece group 72 along the X-axis direction. At this time, the size of the accommodating member 6 along the Y-axis direction is mainly determined by the length of the coil assembly 37 along the Y-axis direction, so that the relay 1 does not need to have a long length in one direction (whether the X-axis direction or the Y-axis direction), which can make the relay 1 more easily adapt to limited space, and can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0111] In the embodiment, the push rod and the moving iron core do not need to be arranged in the coil winding 41, so that the support shaft diameter of the coil holder 40 is smaller, and the inner diameter of the coil winding 41 is smaller. Compared with the direct-acting type magnetic latching relay in the prior art, when the space occupied by the coil assembly 37 is the same, the magnetic driving force generated by the coil winding 41 is stronger, and the pushing force on the armature assembly 38 is larger, which can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0112] In the embodiment, the two attracting portions 60 of the armature assembly 38 can form a first part of the magnetic circuit without any air gap through the permanent magnet 50 and the two armatures 51, and the two magnetic driving ends 45 of the coil assembly 37 can also form a second part of the magnetic circuit through the entire coil assembly 37. In the magnetic holding state, the attracting portions 60 attract the corresponding magnetic driving ends 45 along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without any air gap, thus the magnetic loss is small, the magnetic efficiency is higher, and the movement stroke of the movable contact set 72 can be increased without increasing the power consumption of the coil assembly 37; and in the case of equivalent magnetic driving force, the power consumption required for the coil assembly 37 to achieve magnetic driving can be reduced, which is conducive to making the size of the coil assembly 37 smaller. Therefore, more favorable conditions can be created for increasing the safety distance between the movable contact set 72 and the static contact set 7 in a limited space.

[0113] In the embodiment, since the second part of the magnetic circuit passes through the entire coil assembly 37, compared with the direct-acting magnetic latching relay in the prior art, the magnetic acting force in the magnetic holding state is larger, and in particular, when the relay 1 is subjected to a fault large current impact, the armature assembly 38 is less likely to move out of the magnetic holding state, which is conducive to avoiding the destructive arc caused by the movable contact set 72 moving away from the static contact set 7 due to the fault large current.

[0114] In the embodiment, when the coil assembly 37 is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed, in the case that the armature assembly 38 is in the magnetic holding state at the first position, not only the two magnetic driving ends 45 generate magnetic repulsion on the first attracting portion 61 and the third attracting portion 63, but also a first part of the pushing magnetic circuit without any air gap is formed between the fourth attracting portion 64 and the second attracting portion 62 through the armature assembly 38, and a second part of the pushing magnetic circuit through the entire coil assembly 37 is formed by the two magnetic driving ends 45 through the coil assembly 37, the first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit, which only has a certain stroke air gap and no other air gap, thus the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends 45 acting on the armature assembly 38 is stronger under the same power consumption, which is more conducive to increasing the safety distance between the movable contact set 72 and the static contact set 7. Similarly, when the coil assembly 37 is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed, in the case that the armature assembly 38 is in the magnetic holding state at the second position, the same technical effects can also be achieved.

[0115] In the embodiment, the first suction part 61 and the fourth suction part 64 are arranged along the X-axis direction, the third suction part 63 and the second suction part 62 are arranged along the X-axis direction, the first suction part 61 and the third suction part 63 are arranged along the Y-axis direction, and the fourth suction part 64 and the second suction part 62 are arranged along the Y-axis direction, so that the four suction parts 60 of the armature assembly 38 are respectively located at the four vertex positions of the rectangle in the first projection plane, facilitating adjustment of the size of the armature assembly 38 along the X-axis direction and the Y-axis direction, and creating more favorable conditions for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0116] In the embodiment, the permanent magnets 50 are arranged on the two sides of the portion 59 intersecting with each other along the Y-axis direction, and the two magnetic poles 54 of the permanent magnets 50 are arranged along the X-axis direction, so that the magnetic driving end 45 and the armature assembly 38 are effectively utilized without increasing the size of the armature assembly 38 along the X-axis direction and the Z-axis direction, which is more conducive to increasing the magnetic driving force between the magnetic driving end 45 and the armature assembly 38 and the safety distance between the movable contact group 72 and the static contact group 7. Since each permanent magnet 50 is connected together by two armatures 51, the difference in strength of the magnetic field of each permanent magnet 50 is effectively weakened on the two armatures 51, and the magnetic driving force between the suction parts 60 on the two sides and the magnetic driving end 45 is more balanced along the X-axis direction, so that the relay 1 is less likely to jam and has a longer service life.

[0117] In the embodiment, the projection of the armature assembly 38 on the first projection plane is mirror-symmetrical along the symmetry plane perpendicular to the Y-axis, so that the consistency of the magnetic field strength on the two sides of the armature assembly 38 along the Y-axis direction is better, and the center of gravity is more easily kept on the symmetry plane, the linear motion of the armature assembly 38 is less likely to be skewed, the relay 1 is less likely to jam and has a longer service life, the magnetic driving force is less likely to be wasted on useless work, and more favorable conditions are created for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0118] In the embodiment, the two movable contact points 87 of the movable contact 85 are arranged along the Y-axis direction and fixed to the overcurrent bridge 86 extending along the Y-axis direction, so that the current passing through the overcurrent bridge 86 can flow along the Y-axis direction, facilitating the formation of a magnetic loop for resisting short circuit, and the short-circuit-resistant magnetic loop is used to make the movable contact group 72 more reliably closed with the static contact group 7, which is conducive to avoiding the movable contact group 72 from being separated from the static contact group 7 when the relay 1 bears a fault current, thereby avoiding destructive arc drawing to cause damage to the relay 1.

[0119] In this embodiment, the number of movable contacts 85 in the movable contact group 72 is two or more, and each movable contact 85 is arranged along the Z-axis direction, so that when the movable contact group 72 and the stationary contact group 7 are closed, each movable contact 85 is in parallel with each other, which can increase the load capacity of the relay 1, and also reduce the contact resistance between the movable contact 87 and the stationary contact 20. At the same time, in combination with the technical means that the overcurrent bridge 86 extends along the Y-axis direction, and the technical means that the movable contact 85 moves along the X-axis direction, the relay 1 can make more full use of the space in each direction, and the structure is more compact, which creates more favorable conditions for increasing the safety distance between the movable contact group 72 and the stationary contact group 7 in a limited space.

[0120] In this embodiment, the connection terminal 21 of at least one stationary contact 19 is arranged between the stationary contact 20 and the coil winding 41 along the X-axis direction, which increases the distance between the two connection terminals 21 along the X-axis direction, makes the two stationary contacts 19 less likely to short circuit, and can meet the needs of installing an external transformer.

[0121] In this embodiment, the eighth overcurrent part 34 of the second stationary contact 23 forms a cross-flow part, which is located outside the movable contact group 72 along the Y-axis direction, and is connected to the connection terminal 21 in the opening direction. The magnetic field generated by the current of the cross-flow part acts on the overcurrent bridge 86 in the Y-axis direction, which generates a magnetic force on the overcurrent bridge 86 towards the stationary contact group 7. This magnetic force makes the movable contact group 72 more reliably closed with the stationary contact group 7. Since the magnetic force increases with the increase of current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from the stationary contact group 7, so as to avoid the destructive pull arc causing damage to the relay 1.

[0122] In this embodiment, the movable magnetic conductor group 73 and the stationary magnetic conductor 8 form an anti-short-circuit magnetic loop M1 when the overcurrent bridge 86 flows along the Y-axis direction, so that the movable magnetic conductor group 73 and the movable contact group 72 are subjected to a magnetic force in the closing direction, which makes the movable contact group 72 more reliably closed with the stationary contact group 7. Since the magnetic force increases with the increase of current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from the stationary contact group 7, so as to avoid the destructive pull arc causing damage to the relay 1.

[0123] In the embodiment, the moving magnetic conductor 90 is arranged corresponding to the moving contact 85, so that an anti-short-circuit magnetic loop M1 can be formed around each moving contact 85, and each moving contact 85 is less likely to be separated from the static contact group 7. The magnetic conductor body 91 is fixed to the back of the overcurrent bridge 86, so that the magnetic field generated by the overcurrent bridge 86 is mostly confined in the anti-short-circuit magnetic loop, and the magnetic efficiency is improved. The extension 92 extends from the magnetic conductor body 91 in the closing direction, so that when the moving contact group 72 is closed with the static contact group 7, the air gap between the moving magnetic conductor 90 and the static magnetic conductor 8 is smaller, the magnetic resistance of the anti-short-circuit magnetic loop M1 is smaller, and the moving contact group 72 is less likely to be separated from the static contact group 7. Therefore, the moving contact group 72 can be more reliably closed with the static contact group 7, and when the relay 1 bears a fault large current, it is beneficial to avoid the moving contact group 72 from being separated from the static contact group 7, so as to avoid the relay 1 from being damaged by a destructive arc.

[0124] In the embodiment, the static magnetic conductor 8 is fixed to the accommodating member 6, so that the static magnetic conductor 8 is more easily installed.

[0125] In the embodiment, the static contact 20 of each static contact 19 is located on the two sides of the static magnetic conductor 8 along the Y-axis direction, so that the magnetic force formed by the anti-short-circuit magnetic loop M1 formed by the static magnetic conductor 8 and the moving magnetic conductor group 73 on the moving contact group 72 is more balanced along the Y-axis direction, and each moving contact 87 is less likely to be separated from the corresponding static contact 20.

[0126] In the embodiment, the overcurrent direction of the reverse flow part is opposite to the overcurrent direction of the overcurrent bridge 86, and the static magnetic conductor 8 is located between the reverse flow part and the moving magnetic conductor group 73 along the X-axis direction, so that the magnetic field generated by the reverse flow part is in the same direction as the magnetic field generated by the anti-short-circuit magnetic loop M1 on the side where the static magnetic conductor 8 is located, and the magnetic field strength of the static magnetic conductor 8 is strengthened, so that the magnetic force between the static magnetic conductor 8 and the moving magnetic conductor group 73 is stronger. When the relay 1 bears a fault large current, the moving contact group 72 is less likely to be separated from the static contact group 7, so as to avoid the relay 1 from being damaged by a destructive arc.

[0127] In the embodiment, the second surface S2 is closer to the moving magnetic conductor group 73 along the X-axis direction than the first surface S1, so that the static magnetic conductor 8 is not embedded between the portions of the two static contacts 19 other than the static contact 20 along the Y-axis direction, the creepage distance between the static contact 19 and the static magnetic conductor 8 is increased, and the withstand voltage capability of the relay 1 is improved. At the same time, it is also beneficial to reduce the distance between the two static contacts 20 along the Y-axis direction, and it is beneficial to reduce the size of the accommodating member 6 along the Y-axis direction, so as to create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0128] In the embodiment, the projections of the portions of all the static contacts 20 adapted to contact the moving contact group 72 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of the static flux guide 8 on the second projection plane, and the surface of the static flux guide 8 facing the moving flux guide group 73 is closer to the moving flux guide group 73 than all the static contacts 20 along the X-axis direction. Therefore, when the moving contact group 72 breaks the arc from the static contact group 7, the magnetic field generated by the two side arcs concentrates on the static flux guide 8, so that the arc is not easy to spread to the two sides along the Y-axis direction, the arc escaping between the moving contact 87 and the static contact 20 can reduce the ablation of the surrounding housing 6, and the service life of the relay 1 is ensured. On this basis, the distance between the two static contacts 20 along the Y-axis direction can be designed to be closer, which is beneficial to reducing the size of the housing 6 along the Y-axis direction, and can create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0129] In the embodiment, the two blocking pieces 9 are fixed to the housing 6 and located outside the static contact group 7 along the Y-axis direction. Each blocking piece 9 extends along the X-axis direction, so that the projections of the portions of all the static contacts 20 adapted to contact the moving contact 87 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of each blocking piece 9 on the second projection plane. Therefore, when the moving contact group 72 breaks the arc from the static contact group 7, the arc will not conduct to the two side walls of the housing 6 along the Y-axis direction, ensuring the insulation performance of the housing 6. The blocking piece 9 is made of high-temperature-resistant insulating material, which can prevent the heat of the arc from damaging the blocking piece 9 when the load is large and the arc generates a lot of heat, avoiding damage to the blocking piece 9, and is beneficial to improving the load capacity of the relay 1.

[0130] In the embodiment, the elastic support group 74 is arranged between the pushing piece 70 and the moving contact group 72, which can provide an elastic force to the moving contact group 72 along the closing direction X1 after the pushing piece 70 experiences an overstroke, so that the moving contact group 72 can be more reliably closed with the static contact group 7. When the relay 1 bears a fault current, the moving contact group 72 is less likely to be separated from the static contact group 7, thereby avoiding damage to the relay 1 caused by destructive arc breaking. The elastic support group 74 can also generate an additional repulsive force when the moving contact group 72 breaks from the static contact group 7, helping the moving contact 85 to disconnect with the static contact group 7.

[0131] In the embodiment, by arranging the limiting piece 76, the distance between the moving contact group 72 and the static contact group 7 when the moving contact group 72 is disconnected from the static contact group 7 can meet the design requirements.

[0132] In the embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, which avoids errors that may occur during assembly of the armature assembly 38 and the pushing piece 70, and also makes the pushing piece 70 and the armature assembly 38 have higher integration and fewer parts, which is beneficial to fully utilizing the limited space.

[0133] In the embodiment, the connecting piece 71 is integrally formed with the push piece 70 by insert injection molding, so that the limiting piece 76 is more easily fixed relative to the push piece 70, and the limiting piece 76 is more rigid, the limiting effect on the movable contactor group 72 is better, and the size of the relay 1 along the Y-axis direction can be saved; the two ends of the connecting piece 71 along the Z-axis direction respectively extend out of the push piece 70 to form the connecting end 84 fixed with the limiting piece 76, the size of the relay 1 along the Z-axis direction can be saved, and more favorable conditions can be created for increasing the safety distance between the movable contactor group 72 and the static contactor group 7 in a limited space.

[0134] In the embodiment, the first elastic part 95 is arranged corresponding to the movable contactor 85, and each movable contactor 85 is fixed to the corresponding first elastic part 95, so that each movable contactor 85 can adjust the posture by the relatively independent first elastic part 95, and it is more conducive to reliably closing the two movable contact points 87 of the movable contactor 85 with the corresponding static contact point 20.

[0135] In the embodiment, the first elastic part 95 includes two first elastic arms 97 fixed with the overcurrent bridge 86, which is conducive to the free swing of the movable contactor 85 to adjust the posture. The positions where the two first elastic arms 97 are fixed with the back of the overcurrent bridge 86 respectively correspond to the positions of the movable contact points 87, so that the elastic force of the two first elastic arms 97 directly acts on the two movable contact points 87, and the two movable contact points 87 can be more reliably closed with the corresponding static contact point 20.

[0136] In the embodiment, the elastic piece 75 stores energy when the push piece 70 moves along the breaking direction X2 due to deformation and releases energy when the push piece 70 moves along the closing direction X1 due to recovery of the deformation, which can better help the movable contactor group 72 to start from the breaking position and approach the static contactor group 7, and is conducive to increasing the movement stroke of the movable contactor group 72, so as to be conducive to increasing the safety distance between the movable contactor group 72 and the static contactor group 7.

[0137] In the embodiment, the main body 98 of the elastic piece 75 is in a sheet shape and is fixed relative to the push piece 70, and the second elastic arm 101 extends to both sides of the Y-axis direction and is adapted to abut against the accommodating piece 6, so that the elastic piece 75 occupies less space along the X-axis direction and has good elastic deformation capability, avoiding that the compression length of the spring increases the size of the movable contact portion 4 along the X-axis direction when the spring is used as the elastic piece 75, thereby being conducive to reducing the size of the relay 1 along the X-axis direction, and thus more favorable conditions can be created for increasing the safety distance between the movable contactor group 72 and the static contactor group 7 in a limited space.

[0138] In the embodiment, the guide part 109 is arranged in the middle along the Y-axis direction, compared with the guide part 109 arranged on both sides along the Y-axis direction, the space along the Y-axis direction can be saved, the size of the relay 1 along the Y-axis direction is avoided to increase, at the same time, the phenomenon that the movable contact part 4 is stuck when moving due to the guide part 109 on both sides along the Y-axis direction is not parallel can be avoided, the magnetic driving force of the magnetic circuit part 3 is not easy to waste on useless work, and more favorable conditions can be created for increasing the safety distance between the movable contact group 72 and the static contact group 7 in the limited space.

[0139] In the embodiment, the limiting part 76 abuts against the movable contact group 72 before the pushing part 70 moves into the overstroke along the closing direction X1, and when entering the overstroke, the movable contact point 87 has abutted against the corresponding static contact point 20, so that the first guide part 103 is arranged on the limiting part 76, the movement of the movable contact 85 along the X-axis direction can be better guided, the movable contact point 87 can correctly abut against the static contact point 20 along the X-axis direction, the contact resistance between the movable contact point 87 and the static contact point 20 is reduced, and the time of pulling the arc when the movable contact point 87 and the static contact point 20 are disconnected is shortened, which is beneficial to increase the service life of the movable contact 72 and the static contact 20. This is because the guide part 109 and the sliding groove 13 are slidably connected along the X-axis direction, and a matching gap is inevitably formed between the two. If the guide part 109 is far away from the movable contact 72 along the X-axis direction, the matching gap will be enlarged during the movement of the movable contact 72, so that the movable contact point 87 cannot correctly abut against the static contact point 20 along the X-axis direction, thereby increasing the contact resistance between the movable contact point 87 and the static contact point 20, and the time of pulling the arc when the movable contact point 87 and the static contact point 20 are disconnected is longer, which is not conducive to the service life of the movable contact point 87 and the static contact point 20.

[0140] In the embodiment, the first guide part 103 is arranged on the limiting part 76, which means that the sliding groove 13 is arranged on the accommodating part 6. Since the static contact group 7 is fixedly connected to the accommodating part 6, arranging the sliding groove 13 on the accommodating part 6 is beneficial to ensure that the extension direction of the sliding groove 13 is perpendicular to the arrangement direction of the static contact points 20 of the two static contacts 19, so that the sliding groove 13 can guide the guide part 109 along the X-axis direction more accurately.

[0141] In the embodiment, the first guide part 103 is located at the front part of the limiting body 102 along the closing direction, so that the first guide part 103 is closer to the movable contact point 87 along the X-axis direction, which is more conducive to the movable contact point 87 to correctly abut against the static contact point 20 along the X-axis direction, reduces the contact resistance between the movable contact point 87 and the static contact point 20, and shortens the time of pulling the arc when the movable contact point 87 and the static contact point 20 are disconnected, which is beneficial to increase the service life of the movable contact point 87 and the static contact point 20.

[0142] In the embodiment, the projection of the first guide part 103 on the first projection surface is circular, which is beneficial to avoid the sliding fit between the first guide part 103 and the sliding groove 13 from being stuck.

[0143] In the embodiment, the material of the first guide part 103 is plastic, which is conducive to avoiding the first guide part 103 scratching the plastic material of the accommodating part 6 when the first guide part 103 is made of metal, thereby preventing the contact resistance between the moving contact 87 and the stationary contact 20 from being affected by the scratches falling on the moving contact 87 and the stationary contact 20. The material of the limiting body 102 is metal, which is more rigid and has a better limiting effect on the moving contact group 72. The first guide part 103 and the limiting body 102 are integrally formed by insert injection molding, the combination of the two is better, the position of the first guide part 103 along the Y-axis direction is more accurate, and the first guide part 103 is conducive to better sliding cooperation with the sliding groove 13 along the X-axis direction.

[0144] In the embodiment, the first guide part 103 cooperates with the second guide part 78, which can better keep the moving contact part 4 moving along the X-axis direction by sliding with the sliding groove 13 along the X-axis direction. The second guide part 78 is arranged on the pushing body 77, so that there is a certain distance between the first guide part 103 and the second guide part 78 along the X-axis direction, which is more conducive to not enlarging the cooperation gap between the guide part 109 and the sliding groove 13.

[0145] In the embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, and the second guide part 78 is arranged on the pushing piece 70, which is conducive to guiding the attraction between each attraction part 60 along the X-axis direction and the corresponding magnetic driving end 45, avoiding the cooperation gap between the first guide part 103 and the sliding groove 13 being enlarged at the pushing piece 70 when only the first guide part 103 is arranged, so that the attraction part 60 cannot correctly attract the magnetic driving end 45 along the X-axis direction, ensuring that there is no air gap between the first part of the armature assembly 38 and the second part formed in the coil assembly 37 after the attraction part 60 attracts the magnetic driving end 45, improving the magnetic efficiency and increasing the magnetic driving force, thereby being conducive to increasing the safety distance between the moving contact group 72 and the stationary contact group 7.

[0146] In the embodiment, the projection of the second guide part 78 on the first projection surface is circular, which is conducive to avoiding the sliding cooperation between the second guide part 78 and the sliding groove 13 from being jammed.

[0147] In the embodiment, whether the first slot segment 14 and the second slot segment 15 are connected or not, since both of them are formed in the accommodating part 6, the sliding groove 13 can be ensured to extend along the X-axis direction.

[0148] In the embodiment, by arranging the micro switch 5, the on-off state of the relay 1 can be known by the external relay state sensing circuit. It is convenient to manage the relay 1.

[0149] In the embodiment, the static contact terminal 110 is located between the moving spring 83 and the coil winding 41 along the X-axis direction, which can effectively utilize the space between the pushing member 70 and the coil winding 41, avoid increasing the size of the accommodation member 6 along the Y-axis direction when the static contact terminal 110 is arranged outside the coil assembly 37 along the Y-axis direction, and create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in limited space. The moving spring 83 is fixedly connected with the pushing member 70, so that the position and action of the moving spring 83 are more determined.

[0150] In the embodiment, the shielding cover 39 is arranged to compress the magnetic field of the coil assembly 37 in the iron core 43 and the yoke 44, improve the magnetic field strength between the two magnetic driving ends 45, be beneficial to improve the magnetic efficiency and the pushing force of the magnetic circuit part 3, can create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in limited space, and also can avoid the magnetic circuit part 3 being affected by the external magnetic field.

[0151] The above description and embodiment are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application.

Claims

1. A relay comprising a static contactor group and a movable contactor group, the static contactor group comprising two static contacts, each of the static contacts being provided with a static contact point, the static contact points of the two static contacts being arranged along a Y-axis direction; the movable contactor group being closed or opened along an X-axis direction with the static contactor group to correspondingly turn on or turn off the electrical connection between the two static contacts; characterized in that the relay further comprising a movable magnetic conductor group and a static magnetic conductor; the movable magnetic conductor group being fixed opposite to the movable contactor group and being arranged opposite to the static magnetic conductor along the X-axis direction; the static magnetic conductor being fixed opposite to one of the other components except the movable contactor group and the movable magnetic conductor group, the static contact points of the two static contacts being respectively located on two sides of the static magnetic conductor along the Y-axis direction; the projections of the parts of all the static contact points adapted to contact the movable contactors on a second projection plane perpendicular to the Y-axis direction are all located within the projection of the static magnetic conductor on the second projection plane, and the surface of the static magnetic conductor facing the movable magnetic conductor group is closer to the movable magnetic conductor group along the X-axis direction than all the static contact points.

2. A relay according to claim 1, characterised in that the relay further comprising a housing, the static contactor group and the static magnetic conductor being fixed to the housing.

3. A relay according to claim 1, wherein the magnetic field generated by the coil is, the movable contactor group comprises a movable contactor, the movable contactor comprising an overcurrent bridge and two movable contact points, the overcurrent bridge extending along the Y-axis direction, the two movable contact points being fixed to the overcurrent bridge, the two movable contact points being arranged along the Y-axis direction and being opposite to the static contact points of the two static contacts 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 movable magnetic conductor group comprises a movable magnetic conductor, the movable magnetic conductor being arranged opposite to the movable contactor, the movable magnetic conductor being provided with a magnetic conductor body and an extension, the magnetic conductor body extending along a Z-axis direction and being fixed to the back of the overcurrent bridge, the extension extending from the magnetic conductor body along a closing direction.

5. A relay according to claim 1, wherein the magnetic circuit is formed by a magnetic core and a magnetic yoke, and the magnetic core is formed by a plurality of magnetic pieces. at least one of the static contacts is provided with a reverse flow portion extending along the Y-axis direction, the overcurrent direction of the reverse flow portion being opposite to the overcurrent direction of the overcurrent bridge; the static magnetic conductor is located between the reverse flow portion and the movable magnetic conductor group along the X-axis direction.

6. A relay according to claim 1, wherein the static contact point extends from a first surface of the static contact perpendicular to the X-axis direction, the static magnetic conductor being provided with a second surface perpendicular to the X-axis direction and facing away from the movable magnetic conductor group, the second surface being closer to the movable magnetic conductor group along the X-axis direction than the first surface.

7. A relay according to claim 1, wherein the magnetic circuit is formed by a magnetic core and a magnetic yoke, and the magnetic core is formed by a plurality of magnetic pieces. at least one of the static contacts is provided with a cross flow portion, the cross flow portion extending outside the movable contactor group along the Y-axis direction and along an opening direction; when the movable contactor group is closed with the static contactor group, the magnetic field formed by the current passing through the cross flow portion acts on the overcurrent bridge to exert a magnetic force on the movable contactor towards the static contactor group.

8. A relay according to claim 2, wherein the relay is a latching relay. the relay further comprises two blocking members, the two blocking members being fixed to the housing and being located outside the static contactor group along the Y-axis direction, each of the blocking members extending along the X-axis direction so that the projections of the parts of each of the static contact points adapted to contact the movable contact points on a second projection plane perpendicular to the Y-axis direction are all located within the projection of each of the blocking members on the second projection plane; the blocking members are made of high-temperature-resistant insulating materials.

9. A relay according to claim 1, wherein the relay is a latching relay. the relay further comprises a pushing member, an elastic support group and a limiting member; the pushing member is used to drive the movable contactor group to move along the X-axis direction; the elastic support group is arranged on the pushing member and is located between the pushing member and the movable contactor group along the X-axis direction; the limiting member is fixed opposite to the pushing member and abuts against the movable contactor group along the opening direction when the movable contactor group is opened with the static contactor group.

10. An electricity meter characterised in that, the relay comprises any one of the relays according to claims 1 to 9.

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