Magnetic latching relay and electric meter

Abstract

Disclosed in the present application are a magnetic latching relay and an electric meter. In the magnetic latching relay, a stationary contact member set fixedly connected to an accommodation member comprises two stationary contact members, each stationary contact member being provided with a stationary contact and a connecting terminal, the stationary contacts of the two stationary contact members being arranged in a Y-axis direction, and the connecting terminals of the two stationary contact members extending out of the accommodation member in the Y-axis direction. An armature assembly of the magnetic latching relay comprises two armatures, and the projections of the two armatures on a first projection plane perpendicular to a Z-axis direction intersect with each other; the armature assembly drives a moving contact member set to be connected to or disconnected from the stationary contact member set in an X-axis direction. The electric meter comprises the magnetic latching relay. Compared with the prior art, using the technical solution can create a more favorable condition for increasing a safety distance between the moving contact member set and the stationary contact member set in a limited space.

Description

A magnetic latching relay and an electric meter TECHNICAL FIELD

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

[0002] An intelligent electric meter generally integrates a wiring unit, a communication unit, a measurement unit, a control unit and an execution unit in a meter shell. The relay, as a main component of the execution unit, is controlled by the control unit and acts on the wiring unit to switch the external circuit on and off. In order to save power, the relay in the intelligent electric meter generally adopts a magnetic latching relay. Due to the limited space and high integration in the meter shell, the space that the relay can occupy in the meter shell is very limited, i.e. the relay is required to occupy a space in the meter shell with dimensions in X-axis direction, Y-axis direction and Z-axis direction that are not too large. The relay is provided with a moving contact group and a static contact group for on-off control of the circuit. The intelligent electric meter puts forward higher requirements on the load capacity of the magnetic latching relay. In order to adapt to the improvement of the load capacity, the safety distance between the moving contact group and the static contact group needs to be increased accordingly. For a relay with load terminals respectively led out from the moving contact group and the static contact group, the safety distance between the moving contact group and the static contact group is the distance between the moving contact on the moving contact group and the static contact on the static contact group in the direction of disconnection when the moving contact group and the static contact group are disconnected.

[0003] The magnetic latching relays in the prior art are generally divided into two types: swing type magnetic latching relays and direct acting type magnetic latching relays. However, both of the two types of magnetic latching relays in the prior art are difficult to increase the safety distance between the moving contact group and the static contact group in a limited space.

[0004] The swing type magnetic latching relay comprises a fixed part, a magnetic circuit part and a movable contact part. The fixed part generally comprises a housing and a set of stationary contacts. The magnetic circuit part comprises a coil assembly fixed relative to the housing and an armature assembly swinging relative to the housing. The coil assembly generally comprises a coil winding, a core and two yokes. The core is disposed in the coil winding, and the two yokes are fixed to two ends of the core. The two yokes form two magnetic driving ends at their ends away from the core, and the two magnetic driving ends are arranged along a first direction. The armature assembly comprises a permanent magnet and two armatures. The permanent magnet and the two armatures are arranged in an I-shaped manner, and the two armatures are parallel to each other and sandwich the permanent magnet therebetween. The coil winding is excited by a pulse electrical signal to reverse the polarity of the two magnetic driving ends temporarily formed, so as to drive the armature assembly to swing relative to the housing about a rotation axis perpendicular to the first direction. The movable contact part comprises a swing lever, a pusher and a set of movable contacts. The swing lever is fixed to the armature assembly. The armature assembly drives the swing lever to swing about the rotation axis and drives the pusher to move linearly along a tangent direction of the swing stroke, so as to make the set of movable contacts in the movable contact part close or open with the set of stationary contacts, and correspondingly turn on or turn off an external circuit. In the above technical solution, only the tangential component of the swing stroke of the swing lever can be transmitted to the pusher, and the radial component of the swing stroke of the swing lever is lost. At this time, if it is necessary to increase the safety distance between the set of movable contacts and the set of stationary contacts, it is necessary to increase the linear movement stroke of the pusher, and correspondingly, it is necessary to increase the tangential component of the swing stroke of the swing lever. In order to increase the tangential component of the swing stroke of the swing lever, one solution is to lengthen the radial length of the swing lever, and another solution is to increase the rotation angle of the swing lever. No matter which solution is adopted, it will cause the increase of the space required for the swing of the swing lever and the greater loss of the radial component of the swing stroke of the armature assembly. Therefore, for the swing type magnetic latching relay, in order to increase the safety distance between the set of movable contacts and the set of stationary contacts, it is necessary to increase the volume of the relay, and at the same time, it is necessary to increase the magnetic driving force between the magnetic driving end and the armature assembly, which will further lead to the increase of the energy consumption of the relay and the increase of the volume and weight of the permanent magnet, thereby further increasing the volume of the relay. Due to the above reasons, the swing type magnetic latching relay in the prior art is difficult to meet the demand of increasing the safety distance between the set of movable contacts and the set of stationary contacts in a limited space.

[0005] The prior art direct-acting magnetic latching relay also comprises a fixed part, a magnetic circuit part and a moving contact part. The fixed part comprises a housing and a set of static contacts. The magnetic circuit part comprises a coil winding, a static core, a yoke plate, a yoke cylinder, a permanent magnet and an armature. The coil winding, the static core, the yoke plate, the yoke cylinder and the permanent magnet are fixed to the housing, the armature moves linearly between the yoke plate and the static core relative to the housing, and the moving contact part comprises a push rod fixed to the armature, a push piece fixed to the push rod and a set of moving contacts arranged on the push piece. The push rod moves linearly with the armature and drives the push piece and the set of moving contacts to close or disconnect with the set of static contacts, thereby turning on or off the external circuit. The prior art direct-acting magnetic latching relay has the push rod, the armature, the coil winding and the yoke cylinder arranged in the radial direction from inside to outside. Therefore, the coil support shaft diameter of the coil winding of the prior art direct-acting magnetic latching relay is relatively large. Since the coil winding is arranged along the movement direction of the push rod, the armature also moves along the movement direction of the push rod between the yoke plate and the static core. Therefore, the length of the prior art direct-acting magnetic latching relay along the movement direction of the push rod is much longer than that of the swing type magnetic latching relay. If the safety distance between the set of moving contacts and the set of static contacts needs to be increased, the length of the prior art direct-acting magnetic latching relay, which is already very long, needs to be increased. In addition, when the safety distance between the set of moving contacts and the set of static contacts needs to be increased, the pushing force of the magnetic circuit part needs to be increased, thereby the number of turns of the coil winding and the volume of the permanent magnet need to be increased, resulting in further increase in the volume. At the same time, since the relative sliding between the armature and the permanent magnet in the prior art direct-acting magnetic latching relay forms an air gap, the magnetic efficiency is low, and the required pushing force is larger. Therefore, the prior art direct-acting magnetic latching relay is also difficult to meet the demand of increasing the safety distance between the set of moving contacts and the set of static contacts in a limited space. SUMMARY

[0006] The present application aims to overcome the above-mentioned defects or problems in the background art and provide a magnetic latching relay and an electric meter which can create more favorable conditions for increasing the safety distance between the set of moving contacts and the set of static contacts in a limited space.

[0007] To achieve the above-mentioned purpose, the following technical solutions are adopted:

[0008] The application relates to a magnetic latching relay, which comprises: a fixed part comprising a housing and at least one static contact group; the static contact group is fixed to the housing and comprises two static contacts, each of which is provided with a static contact point and a connection terminal, the static contact points of the two static contacts are arranged along the Y-axis direction, and the connection terminals of the two static contacts extend out of the housing along the Y-axis direction; a moving contact part comprising a moving contact group, the moving contact group is closed or disconnected with the static contact group along the X-axis direction; a magnetic circuit part comprising a coil assembly and an armature assembly; the coil assembly comprises a coil winding, the axis of the coil winding extends along the Y-axis direction, and when excited by a pulse electric signal, drives the armature assembly to move along the X-axis direction; the armature assembly drives the moving contact group to move and comprises two armatures, the projections of the two armatures on a first projection plane perpendicular to the Z-axis direction intersect each other.

[0009] The second technical solution is based on the first technical solution, wherein the coil winding is provided with two magnetic driving ends, and the two magnetic driving ends are arranged along the Y-axis direction; the coil winding reverses the polarity temporarily formed by the two magnetic driving ends when excited by a pulse electric signal, so as to switch the different parts of the two armatures attracted in the X-axis direction.

[0010] The third technical solution is based on the second technical solution, wherein each armature is provided with two attracting parts corresponding to the two magnetic driving ends, and the attracting parts are suitable for attracting the corresponding magnetic driving ends along the X-axis direction.

[0011] The fourth technical solution is based on the third technical solution, wherein the two armatures are respectively a first armature and a second armature, the two attracting parts of the first armature are respectively a first attracting part and a second attracting part, and the two attracting parts of the second armature are respectively a third attracting part and a fourth attracting part; the first attracting part and the third attracting part are arranged along the Y-axis direction, the fourth attracting part and the second attracting part are arranged along the Y-axis direction, the first attracting part and the fourth attracting part are arranged along the X-axis direction, and the third attracting part and the second attracting part are arranged along the X-axis direction; the armature assembly moves between a first position and a second position along the X-axis direction; in the first position, the first attracting part and the third attracting part respectively attract the two magnetic driving ends, so that the moving contact group is disconnected with the static contact group; in the second position, the fourth attracting part and the second attracting part respectively attract the two magnetic driving ends, so that the moving contact group is closed with the static contact group.

[0012] The fifth technical solution is based on the third technical solution, wherein the armature assembly further comprises a permanent magnet, and the two armatures are respectively fixed to two magnetic poles of the permanent magnet.

[0013] The sixth technical solution is based on the fifth technical solution, wherein the number of the permanent magnets is at least two, and the permanent magnets are respectively located on two sides of the part intersecting each other along the Y-axis direction, the two magnetic poles of the permanent magnet are arranged along the X-axis direction, and each armature is fixed to the magnetic pole of the same polarity of each permanent magnet.

[0014] The seventh technical solution is based on the fifth technical solution, wherein the two magnetic poles of the permanent magnet are arranged along the Z-axis direction, each armature is provided with a fixed part fixedly connected with the magnetic pole of the permanent magnet, and the two attraction parts extend from the fixed part along the Z-axis direction.

[0015] The eighth technical solution is based on the seventh technical solution, wherein the number of the permanent magnets is one.

[0016] The ninth technical solution is based on any one of the fifth to eighth technical solutions, wherein the projection of the armature assembly on the first projection plane is mirror symmetrical relative to the symmetry plane perpendicular to the Y-axis direction.

[0017] The tenth technical solution is based on the first technical solution, wherein the movable contact group comprises a movable contact, the movable contact comprises an overcurrent bridge and two movable contact points, the overcurrent bridge extends along the Y-axis direction, the two movable contact points are fixedly connected to the overcurrent bridge, and the two movable contact points are arranged along the Y-axis direction and opposite to the static contact points of the two static contacts along the X-axis direction.

[0018] The eleventh technical solution is based on the tenth technical solution, wherein the number of the movable contacts in the movable contact group is two or more, and each movable contact is arranged along the Z-axis direction.

[0019] The twelfth technical solution is based on the tenth technical solution, wherein the connection terminal of at least one static contact is located between the static contact point and the coil winding along the X-axis direction; the static contact is provided with a cross-flow part, the cross-flow part is located on the outer side of the movable contact group along the Y-axis direction and is connected to the connection terminal along the disconnection direction; when the movable contact group and the static contact group are closed, the magnetic field formed by the current passing through the cross-flow part acts on the overcurrent bridge to exert a magnetic force on the movable contact towards the static contact group.

[0020] The thirteenth technical solution is based on the tenth technical solution, wherein it further comprises a static magnetic conductor; the static magnetic conductor is fixed relative to one of the other components except the movable contact group and the movable magnetic conductor group; the movable contact part comprises the movable magnetic conductor group, the movable magnetic conductor group is fixed relative to the movable contact group, and the movable magnetic conductor group is opposite to the static magnetic conductor along the X-axis direction; when the movable contact group and the static contact group are closed, the movable magnetic conductor group and the static magnetic conductor form a magnetic circuit based on the current passing through the overcurrent bridge to make the movable magnetic conductor group and the movable contact group receive a magnetic force along the closing direction.

[0021] The fourteenth technical solution is based on the thirteenth technical solution, wherein the movable magnetic conductor group comprises a movable magnetic conductor, the movable magnetic conductor is correspondingly arranged with the movable contact, the movable 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 fixedly connected to the back surface of the overcurrent bridge, and the extension part extends from the magnetic conductor body along the closing direction.

[0022] The fifteenth technical solution is based on the thirteenth technical solution, wherein the static magnetic conductor is fixedly connected to the accommodating part.

[0023] The sixteenth technical solution is based on the fifteenth technical solution, wherein the static contact points of the two static contacts are respectively located on two sides of the static magnetic conductor along the Y-axis direction.

[0024] The seventeenth technical solution is based on the sixteenth technical solution, wherein at least one static contact is provided with a reverse flow part extending along the Y-axis direction, the flow direction of the reverse flow part is opposite to the flow direction of the flow bridge; the static magnetic conductor is located between the reverse flow part and the moving magnetic conductor group along the X-axis direction.

[0025] The eighteenth technical solution is based on the sixteenth technical solution, wherein the static contact points extend from a first surface of the static contact perpendicular to the X-axis direction, the static magnetic conductor is provided with a second surface facing away from the moving magnetic conductor group and perpendicular to the X-axis direction, and the second surface is closer to the moving magnetic conductor group along the X-axis direction than the first surface.

[0026] The nineteenth technical solution is based on the sixteenth technical solution, wherein the projections of the parts adapted to contact the moving contact group of all the static contact points on a second projection plane perpendicular to the Y-axis direction are located within 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 all the static contact points.

[0027] The twentieth technical solution is based on the tenth technical solution, wherein the fixing part further comprises two blocking pieces, the two blocking pieces are fixedly connected to the accommodating piece and located outside the static contact group along the Y-axis direction, each blocking piece extends along the X-axis direction, so that the projections of the parts adapted to contact the moving contact points of each static contact on a second projection plane perpendicular to the Y-axis direction are located within the projection of each blocking piece on the second projection plane; the blocking piece is made of high-temperature-resistant insulating material.

[0028] The twenty-first technical solution is based on the tenth technical solution, wherein the moving contact part further comprises a pushing piece, an elastic support group and a limiting piece; the pushing piece is fixedly connected with the armature assembly; the elastic support group is arranged on the pushing piece and located between the pushing piece and the moving contact group along the X-axis direction; the limiting piece is fixed relative to the pushing piece and abuts against the moving contact group along the disconnection direction when the moving contact group is disconnected from the static contact group.

[0029] The twenty-second technical solution is based on the twenty-first technical solution, wherein the armature assembly and the pushing piece are integrally formed by insert injection molding.

[0030] The twenty-third technical solution is based on the twenty-second technical solution, wherein the moving contact part further comprises a connecting piece, the connecting piece is integrally formed with the pushing piece by insert injection molding; the connecting piece extends along the Z-axis direction, and both ends of the connecting piece respectively protrude out of the pushing piece to form two connecting ends, and the limiting piece is fixedly connected with the connecting ends.

[0031] The twenty-fourth technical solution is based on the twenty-first technical solution, wherein the elastic support group comprises an elastic support, the elastic support is provided with a support body and a first elastic part, the support body is fixed relative to the pushing piece, and the first elastic part is adapted to deform along the X-axis direction and is arranged correspondingly to the moving contact piece.

[0032] The twenty-fifth technical solution is based on the twenty-fourth technical solution, wherein the first elastic part comprises two first elastic arms, one end of the first elastic arm is integrated with the support body, and the other end is fixedly connected to the back of the overcurrent bridge corresponding to the position of the moving contact point.

[0033] The twenty-sixth technical solution is based on the twenty-first technical solution, wherein the moving contact part further comprises an elastic piece, the elastic piece is adapted to abut against the accommodating piece, the elastic piece deforms to store energy when the pushing piece moves in the disconnecting direction, and the elastic piece recovers deformation to release energy when the pushing piece moves in the closing direction.

[0034] The twenty-seventh technical solution is based on the twenty-sixth technical solution, wherein the elastic piece is provided with a main body and a second elastic part, the main body is in the shape of a sheet perpendicular to the X-axis direction and is fixed relative to the pushing piece, the second elastic part is adapted to deform along the X-axis direction, the second elastic part comprises two second elastic arms, one end of each of the two second elastic arms is integrated with the main body, and the other end of each of the two second elastic arms extends to the two sides of the Y-axis direction and is adapted to abut against the accommodating piece.

[0035] The twenty-eighth technical solution is based on the twenty-third technical solution, wherein one of the moving contact part and the accommodating piece is provided with a guide part, the other of the moving contact part and the accommodating piece is provided with a sliding groove in sliding cooperation with the guide part along the X-axis direction, the guide part extends into the sliding groove along the Z-axis direction and is centrally located between the two moving contact points of the moving contact piece along the Y-axis direction.

[0036] The twenty-ninth technical solution is based on the twenty-eighth technical solution, wherein the guide part comprises two first guide parts, and the number of the sliding grooves is two; the first guide part is formed on the limiting piece, the limiting piece further comprises a limiting body, and the two first guide parts extend into the corresponding sliding grooves away from each other along the Z-axis direction from the limiting body.

[0037] The thirtieth technical solution is based on the twenty-ninth technical solution, wherein the first guide part is located at the front part of the limiting body along the closing direction.

[0038] The thirty-first technical solution is based on the twenty-ninth technical solution, wherein the projection of the first guide part on the first projection plane is circular.

[0039] The thirty-second technical solution is based on the twenty-ninth technical solution, wherein the material of the first guide part is plastic, the material of the limiting body is metal, and the two first guide parts and the limiting body are integrally formed by insert injection molding.

[0040] The thirty-third technical solution is based on the twenty-ninth technical solution, wherein the guide part further comprises a second guide part; the second guide part is formed on the pushing member, and the pushing member further comprises a pushing body, and the two second guide parts extend into the corresponding sliding grooves from the pushing body along the Z-axis direction and away from each other.

[0041] The thirty-fourth technical solution is based on the thirty-third technical solution, wherein the projection of the second guide part on the first projection plane is circular.

[0042] The thirty-fifth technical solution is based on the thirty-third technical solution, wherein each sliding groove is divided into a first groove segment adapted to be in sliding cooperation with the first guide part and a second groove segment adapted to be in sliding cooperation with the second guide part; the first groove segment and the second groove segment are connected or separated along the X-axis direction.

[0043] The thirty-sixth technical solution is based on the twenty-second technical solution, and further comprises a micro switch; the micro switch comprises a moving spring and two static contact terminals, the static contact terminals are fixedly connected with the accommodating member and penetrate through the accommodating member along the Z-axis direction; the two static contact terminals are arranged along the Y-axis direction; the moving spring is driven by the moving contact part to abut against the two static contact terminals along the X-axis direction, and is driven by the moving contact part or is driven to move away from the two static contact terminals based on the elastic restoring force.

[0044] The thirty-seventh technical solution is based on the thirty-sixth technical solution, wherein the moving spring is fixedly connected with the pushing member; the two static contact terminals are located between the moving spring and the coil winding along the X-axis direction.

[0045] The thirty-eighth technical solution is based on the first technical solution, wherein the coil assembly comprises a shielding cover, the shielding cover is fixedly connected with the accommodating member and covers the coil winding on both sides of the coil winding along the Z-axis direction and covers the coil winding from the rear along the X-axis direction.

[0046] The thirty-ninth technical solution relates to a meter, which comprises the magnetic latching relay according to any one of the first to thirty-eighth technical solutions.

[0047] Compared with the prior art, the above-mentioned solutions have the following beneficial effects:

[0048] In the first technical solution, the static contact points of the two static contact members are arranged along the Y-axis direction, and the moving contact member group is closed or disconnected with the static contact member group along the X-axis direction, so as to correspondingly turn on or turn off the electrical connection between the two static contact members. Under this structure, the safety distance between the moving contact member group and the static contact member group is twice the actual distance between the moving contact points and the corresponding static contact points along the X-axis direction, so that the relay has higher safety and stronger load capacity, and is more conducive to improving the safety distance between the moving contact member group and the static contact member group.

[0049] In the first technical solution, the static contact points of the two static contacts are arranged along the Y-axis direction, and the connecting terminals of the two static contacts are arranged along the X-axis direction and extend out of the accommodating member along the Y-axis direction. Therefore, the first technical solution bends the static contacts. Compared with the static contacts extending out of the accommodating member along the movement direction of the moving contact group, 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 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 group and the static contact group in a limited space.

[0050] Compared with the swing type magnetic latching relay in the prior art, the first technical solution retains the coil assembly of the swing type magnetic latching relay, and improves the two armatures from being arranged in parallel to being crossed with each other in the armature assembly, so that the armature assembly is converted from swinging relative to the coil assembly to linear motion relative to the coil assembly. Since the armature assembly moves linearly relative to the coil assembly, there is no loss of the radial component of the swing stroke of the swing type magnetic latching relay. Therefore, the space utilization of the relay can be higher, which can create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0051] Compared with the direct-acting type magnetic latching relay in the prior art, the first technical solution has a smaller diameter of the support shaft of the coil holder and a smaller inner diameter of the coil winding, because the push rod and the moving iron core do not need to be arranged in the coil winding. Therefore, compared with the direct-acting type magnetic latching relay in the prior art, the first technical solution has a stronger magnetic driving force generated by the coil winding and a larger pushing force on the armature assembly when the space occupied by the coil assembly is the same, which can create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0052] Compared with the direct-acting type magnetic latching relay in the prior art, the second technical solution has the axis of the coil winding extending along the Y-axis direction and the two magnetic driving ends arranged along the Y-axis direction, and the linear motion direction of the armature assembly is the X-axis direction perpendicular to the Y-axis direction. Such arrangement is beneficial to leaving space for the movement of the armature assembly and the moving contact group along the X-axis, and at this time, the size of the accommodating member along the Y-axis direction is mainly determined by the length of the coil assembly along the Y-axis direction. Therefore, the first technical solution does not require a long length in one direction (either the X-axis direction or the Y-axis direction) of the relay, which can make the relay more easily adapt to limited space, and can create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0053] The third technical solution is one of the specific implementations of the first technical solution. Since the two armatures in the armature assembly are improved to cross each other on the basis of the coil assembly of the swing type magnetic latching relay, a magnetic circuit first part without any air gap can be formed between the two attracting parts of the armature assembly, and a magnetic circuit second part penetrating through the entire coil assembly can also be formed between the two magnetic driving ends of the coil assembly. In the magnetic holding state, the attracting parts attract the corresponding magnetic driving ends along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without air gap, thus the magnetic loss is small and the magnetic efficiency is higher. In the case of not increasing the power consumption of the coil assembly, it is beneficial to increase the movement stroke of the movable contact group; and in the case of equivalent magnetic driving force, it can reduce the power consumption required for the coil assembly to realize magnetic driving, which is beneficial to make the size of the coil assembly smaller. Therefore, it can create more favorable conditions for increasing the safety distance between the movable contact group and the static contact group in a limited space.

[0054] The direct-acting type magnetic latching relay in the prior art often forms two magnetic circuits resisting each other in the magnetic holding state, one of which passes through the yoke plate, and the other of which passes through the static iron core. The magnetic action force directions of the two magnetic circuits on the moving iron core are opposite, and the second part of the magnetic circuit in the second technical solution penetrates through the entire coil assembly, so there is no above-mentioned problem. Therefore, compared with the direct-acting type magnetic latching relay in the prior art, the magnetic action force in the magnetic holding state is larger, especially when the relay is impacted by a fault large current, the armature assembly is less likely to move out of the magnetic holding state, which is beneficial to avoid the destructive arc drawn by the movable contact group from the static contact group due to the fault large current.

[0055] In the fourth technical solution, when the coil assembly is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends temporarily formed in the case that the armature assembly is in the magnetic holding state at the first position, not only the two magnetic driving ends generate magnetic repulsion on the first attracting part and the third attracting part, but also the first part of the pushing magnetic circuit without air gap is formed between the fourth attracting part and the second attracting part through the armature assembly, and the second part of the pushing magnetic circuit penetrating through the entire coil assembly is formed by the two magnetic driving ends through the coil assembly. The first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit, which only has a certain travel air gap and no other air gap, so the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends on the armature assembly is stronger under the same power consumption, which is more beneficial to increase the safety distance between the movable contact group and the static contact group. Similarly, when the coil assembly is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends temporarily formed in the case that the armature assembly is in the magnetic holding state at the second position, the same technical effects can be achieved.

[0056] In the fourth technical solution, the first and fourth attracting portions are arranged along the X-axis direction, the third and second attracting portions are arranged along the X-axis direction, the first attracting portion and the third attracting portion are arranged along the Y-axis direction, and the fourth attracting portion and the second attracting portion are arranged along the Y-axis direction, so that the four attracting portions of the armature assembly 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 along the X-axis direction and the Y-axis direction, and creating more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0057] In the fifth technical solution, the magnetic retention function of the armature assembly is realized by arranging the permanent magnets.

[0058] In the sixth technical solution, the permanent magnets are arranged on the two sides of the Y-axis along the intersecting part, and the two magnetic poles of the permanent magnets are arranged along the X-axis direction. Without increasing the size of the armature assembly along the X-axis direction and the Z-axis direction, the space occupied by the armature assembly is fully utilized to increase the magnetic force between the magnetic driving end and the armature assembly, which is more conducive to increasing the safety distance between the moving contact group and the static contact group. Since each permanent magnet is connected together through two armatures, the strength difference of the magnetic field of each permanent magnet is effectively weakened on the two armatures, and the magnetic propelling force between the attracting portions on the two sides and the magnetic driving end along the X-axis direction is more balanced, so that the relay is less likely to jam and has a longer service life.

[0059] The seventh technical solution is a further improvement of the fourth technical solution. In the fourth technical solution, the permanent magnets located on the two sides of the Y-axis along the intersecting part are formed by magnetizing the magnetic steel. Since the magnetic pole directions of the two permanent magnets are opposite along the X-axis direction, two magnetizations are required to complete the magnetization. This can cause at least two problems. The first problem is the risk of incorrect magnetization direction of the magnetic steel, and the second problem is that if the distance between the two magnetic steels along the Y-axis direction is close, the magnetic steel may demagnetize during the second magnetization, resulting in poor consistency of the magnetic parameters of the two permanent magnets. In the fifth technical solution, even if the number of permanent magnets is more than one, since the magnetic poles of the permanent magnets are arranged along the Z-axis direction, the magnetic poles of each permanent magnet are the same along the Z-axis direction, so one magnetization can complete the magnetization, thus solving the above two problems well, which is conducive to ensuring the consistency of the magnetic field strength of the attracting portions on the two sides of the armature assembly along the Y-axis direction, and also ensuring that the two armatures and the permanent magnets have a large contact area to improve the magnetic cross section and magnetic efficiency.

[0060] The eighth technical solution is a preferred embodiment of the fifth technical solution. The number of permanent magnets is only one, so the structure is simple, and the cost of the armature assembly is reduced. The sixth technical solution is also beneficial to increasing the size of the permanent magnet along the Y-axis direction, the X-axis direction and the Z-axis direction, so that the magnetic holding force of the armature assembly is larger, the magnetic driving force of the magnetic driving end on the armature assembly is also larger, and more favorable conditions can be created for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0061] In the ninth technical solution, the projection of the armature assembly 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 intensity on both sides of the armature assembly along the Y-axis direction is better, and the center of gravity is also easier to keep on the symmetry plane, the straight line motion of the armature assembly is less likely to be skewed, the relay 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 can be created for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0062] In the tenth technical solution, the two moving contact points of the moving 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 can flow along the Y-axis direction, which is convenient for forming a magnetic loop for short circuit resistance. The short circuit resistance magnetic loop is used to make the moving contact group more reliably closed with the static contact group, which is beneficial to avoid the moving contact group from being separated from the static contact group when the relay bears a fault current, thereby avoiding destructive arc drawing to cause damage to the relay.

[0063] In the eleventh technical solution, the number of moving contacts in the moving contact group is two or more, and each moving contact is arranged along the Z-axis direction, so that when the moving contact group is closed with the static contact group, each moving contact is in parallel with each other, which can increase the load capacity of the relay and also reduce the contact resistance between the moving contact and the static contact. At the same time, combined with the technical means that the overcurrent bridge extends along the Y-axis direction and the technical means that the moving contact moves along the X-axis direction, the relay 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 moving contact group and the static contact group in a limited space.

[0064] In the twelfth technical solution, the connection terminals of at least one static contact are arranged between the static contact and the coil winding along the X-axis direction, which increases the distance between the two connection terminals along the X-axis direction, so that the two static contacts are less likely to be short-circuited, and the demand for external mutual inductor installation can be met.

[0065] In the twelfth technical solution, the static contact is provided with a cross-flow part, the cross-flow part is located outside the moving contact group along the Y-axis direction, and is connected to the connecting terminal along the disconnecting direction. The magnetic field generated by the current of the cross-flow part acts on the overcurrent bridge in the Y-axis direction, and generates a magnetic force on the overcurrent bridge towards the static contact group, which enables the moving contact group to be more reliably closed with the static contact 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 contact group from being separated from the static contact group, thereby avoiding the relay damage caused by the destructive pulling of the electric arc.

[0066] In the thirteenth technical solution, the moving magnetic conductor group and the static magnetic conductor form an anti-short-circuit magnetic loop when the overcurrent bridge flows along the Y-axis direction, so that the moving magnetic conductor group and the moving contact group are subjected to a magnetic force along the closing direction, enabling the moving contact group to be more reliably closed with the static contact 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 contact group from being separated from the static contact group, thereby avoiding the relay damage caused by the destructive pulling of the electric arc.

[0067] In the thirteenth technical solution, since the magnetic force exerted on the moving magnetic conductor group and the moving contact group by the anti-short-circuit magnetic loop is along the closing direction towards the static magnetic conductor, the "static magnetic conductor is fixed relative to one of the other components except the moving contact group and the moving magnetic conductor" essentially means that the static magnetic conductor is fixed relative to the other components in front of the moving magnetic conductor along the closing direction, generally relative to the accommodating member or the static contact or the limiting member.

[0068] In the fourteenth technical solution, the moving magnetic conductor is correspondingly arranged with the moving contact, so that an anti-short-circuit magnetic loop can be formed around each moving contact, enabling each moving contact to be less likely to be separated from the static contact group. The magnetic body is fixedly connected to the back of the overcurrent bridge, so that the magnetic field generated by the current of the overcurrent bridge is mostly constrained in the anti-short-circuit magnetic loop, improving the magnetic efficiency. The extension part extends from the magnetic body along the closing direction, so that when the moving contact group is closed with the static contact group, the air gap between the moving magnetic conductor and the static magnetic conductor is smaller, the magnetic resistance of the anti-short-circuit magnetic loop is smaller, and the moving contact group is less likely to be separated from the static contact group. Therefore, the moving 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 moving contact group from being separated from the static contact group, thereby avoiding the relay damage caused by the destructive pulling of the electric arc.

[0069] The fifteenth technical solution is a preferred embodiment of the eleventh technical solution. The static magnetic conductor is fixedly connected to the accommodating member, making it easier to install the static magnetic conductor.

[0070] In the sixteenth technical solution, 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, enabling the magnetic force formed by the anti-short-circuit magnetic loop formed by the static magnetic conductor and the moving magnetic conductor group on the moving contact group to be more balanced along the Y-axis direction, and both the moving contact points are less likely to be separated from the corresponding static contact points.

[0071] In the seventeenth technical solution, the flow direction of the reverse flow part is opposite to the flow direction of the flow bridge, and the static magnetic conductor is located between the reverse flow part and the moving magnetic conductor group 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 on the side of the static magnetic conductor, thereby strengthening the magnetic field intensity of the static magnetic conductor, and the magnetic force between the static magnetic conductor and the moving magnetic conductor group is stronger, so that the moving contact group is less likely to separate from the static contact group when the relay bears a large fault current, thereby avoiding the damage of the relay caused by the destructive arc.

[0072] In the eighteenth technical solution, the second surface is closer to the moving magnetic conductor group along the X-axis direction than the first surface, so that the static magnetic conductor 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 conductor and improving the voltage resistance of the relay. At the same time, it is also beneficial to reduce the distance between the two static contact points along the Y-axis direction, and is beneficial to reduce the size of the accommodating member along the Y-axis direction, thereby creating more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0073] In the nineteenth technical solution, the projections of the portions of all the static contact points adapted to contact the moving contact group on a second projection plane perpendicular to the Y-axis direction are located within 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 all the static contact points. Therefore, when the moving contact group breaks the arc from the static contact group, the magnetic field generated by the two arcs on the static magnetic conductor is concentrated, so that the arc is less likely to spread along the Y-axis direction, thereby reducing the ablation of the surrounding accommodating member caused by the arc escaping between the static contact point and the static contact point, and ensuring the service life of the relay. On this basis, the distance between the two static contact points along the Y-axis direction can be designed to be closer, which is beneficial to reduce the size of the accommodating member along the Y-axis direction, and can create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0074] In the twentieth technical solution, two blocking members are fixed to the accommodating member and located outside the static contact group along the Y-axis direction, and each blocking member extends along the X-axis direction so that the projections of the portions of each static contact point adapted to contact the moving contact point on a second projection plane perpendicular to the Y-axis direction are located within the projection of each blocking member on the second projection plane. Therefore, when the moving contact group breaks the arc from the static contact group, the arc will not conduct to the two side walls of the accommodating member along the Y-axis direction, thereby ensuring the insulation performance of the accommodating member. The blocking member is made of high-temperature-resistant insulating material, which can prevent the heat of the arc from damaging the blocking member when the load is large and the arc generates a lot of heat, thereby avoiding damage to the blocking member and improving the load capacity of the relay.

[0075] In the twenty-first technical solution, the elastic support group is arranged between the pusher and the movable contact group, and can provide elastic force to the movable contact group in the closing direction after the pusher experiences overstroke, so that the movable contact group can be more reliably closed with the static contact group, and the movable contact group is less likely to be separated from the static contact group when the relay bears a fault large current, thereby avoiding destructive arc pulling to cause damage to the relay. The elastic support group can also generate additional repulsive force when the movable contact group is disconnected from the static contact group, helping the movable contact to disconnect from the static contact group.

[0076] In the twenty-first technical solution, by arranging the limiting piece, the distance between the movable contact group and the static contact group when the movable contact group is disconnected from the static contact group can meet the design requirements.

[0077] In the twenty-second technical solution, the armature assembly and the pusher are integrally formed by insert injection molding, which avoids errors that may occur during assembly of the armature assembly and the pusher, and also makes the pusher and the armature assembly have higher integration and fewer components, which is conducive to fully utilizing the limited space.

[0078] In the twenty-third technical solution, the connecting piece and the pusher are integrally formed by insert injection molding, which makes the limiting piece more easily fixed relative to the pusher and has higher rigidity, and the limiting effect on the movable contact group is better, and can also save the size of the relay along the Y-axis direction; the two ends of the connecting piece along the Z-axis direction respectively extend out of the pusher to form connecting ends fixed with the limiting piece, which can save the size of the relay along the Z-axis direction and create more favorable conditions for increasing the safety distance between the movable contact group and the static contact group in the limited space.

[0079] In the twenty-fourth technical solution, the first elastic part is arranged corresponding to the movable contact, and each movable contact is fixed to the corresponding first elastic part, so that each movable contact can be adjusted in posture by the relatively independent first elastic part, which is more conducive to reliably closing the two movable contact points of the movable contact with the corresponding static contact points.

[0080] In the twenty-fifth technical solution, the first elastic part includes two first elastic arms fixed to the overcurrent bridge, which is conducive to the free swinging of the movable contact to adjust the posture. The positions where the two first elastic arms are fixed to the back of the overcurrent bridge correspond to the positions of the movable contact points respectively, which can make the elastic force of the two first elastic arms directly act on the two movable contact points, and more reliably ensure that the two movable contact points are closed with the corresponding static contact points.

[0081] In the twenty-sixth technical solution, the elastic piece stores energy when the pusher moves in the disconnecting direction due to deformation, and releases energy when the pusher moves in the closing direction due to recovery of deformation, which can better help the movable contact group to start from the disconnected position and approach the static contact group, and is conducive to increasing the movement stroke of the movable contact group, and thus is also conducive to increasing the safety distance between the movable contact group and the static contact group.

[0082] In the twenty-seventh technical solution, the main body of the elastic member is in a sheet shape and is fixed relative to the pushing member, and the second elastic arm extends to both sides of the Y-axis direction and is suitable for abutting against the containing member, so that the space occupied by the elastic member along the X-axis direction is smaller and the elastic member has good elastic deformation capability, avoiding the increase of the compression length of the spring when the spring is used as the elastic member and the size of the moving contact part along the X-axis direction, thereby facilitating the reduction of the size of the relay along the X-axis direction, and thus more favorable conditions can be created for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0083] In the twenty-eighth technical solution, the guide part is arranged in the middle along the Y-axis direction, which can save space along the Y-axis direction compared to arranging the guide part on both sides along the Y-axis direction, avoids the increase of the size of the relay along the Y-axis direction, and at the same time avoids the phenomenon that the moving contact part may jam during movement due to the non-parallel of the guide parts on both sides along the Y-axis direction, so that the magnetic driving force of the magnetic circuit part is not easily wasted on useless work, and more favorable conditions can be created for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0084] In the twenty-ninth technical solution, since the limiting member abuts against the moving contact group before the pushing member moves into the overstroke along the closing direction, and when the overstroke is entered, the moving contact point has abutted against the corresponding static contact point, so that the first guide part is arranged on the limiting member, which can better guide the movement of the moving contact along the X-axis direction, so that the moving contact point correctly abuts against the static contact point, reduces the contact resistance between the moving contact point and the static contact point, and shortens the time length of the electric arc drawn when the moving contact point and the static contact point are disconnected, which is conducive to increasing the service life of the moving contact point and the static contact point. This is because the guide part and the sliding groove are in sliding fit along the X-axis direction, and a fit gap is inevitably formed between the two, and if the distance between the guide part and the moving contact along the X-axis direction is far, the fit gap will be enlarged on the movement of the moving contact, so that the moving contact point cannot correctly abut against the static contact point along the X-axis direction, thereby increasing the contact resistance between the moving contact point and the static contact point, and also making the time of drawing the electric arc longer when the moving contact point is disconnected from the static contact point, which is not conducive to the service life of the moving contact point and the static contact point.

[0085] In the twenty-ninth technical solution, the first guide part is arranged on the limiting member, which means that the sliding groove is arranged on the containing member. Since the static contact group is fixedly connected to the containing member, the arrangement of the sliding groove on the containing member is conducive to ensuring that the extension direction of the sliding groove is perpendicular to the arrangement direction of the static contact points of the two static contacts, so that the sliding groove guides the guide part along the X-axis direction more accurately.

[0086] In the thirtieth technical solution, the first guide part is located at the front part of the limiting body along the closing direction, so that the first guide part is closer to the moving contact point along the X-axis direction, which is more conducive to the correct abutment of the moving contact point against the static contact point along the X-axis direction, reduces the contact resistance between the moving contact point and the static contact point, and shortens the time length of the electric arc drawn when the moving contact point and the static contact point are disconnected, which is conducive to increasing the service life of the moving contact point and the static contact point.

[0087] In the thirty-first technical solution, the projection of the first guide part on the first projection plane is circular, which is beneficial to avoid the jamming of the sliding cooperation between the first guide part and the sliding groove.

[0088] In the thirty-second technical solution, the material of the first guide part is plastic, which is beneficial to avoid the scraping of the plastic material of the accommodating part when the first guide part is made of metal, thereby preventing the contact resistance between the moving contact and the stationary contact from being affected by the scrapings falling on the moving contact and the stationary contact. The material of the limiting body is metal, which is more rigid and has a better limiting effect on the moving contact group. The first guide part and the limiting body are integrally formed by insert injection molding, the combination of the two is better, the position of the first guide part along the Y-axis direction is more accurate, and the sliding cooperation between the first guide part and the sliding groove along the X-axis direction is better.

[0089] In the thirty-third technical solution, the first guide part and the second guide part cooperate with each other to better keep the moving contact moving along the X-axis direction through the sliding cooperation with the sliding groove along the X-axis direction. The second guide part is arranged on the pushing body, so that there is a certain distance between the first guide part and the second guide part along the X-axis direction, which is more beneficial to not enlarge the cooperation gap between the guide part and the sliding groove.

[0090] In the thirty-third technical solution, the armature assembly and the pushing piece are integrally formed by insert injection molding, and the second guide part is arranged on the pushing piece, which is beneficial to guide the attraction between the attraction parts along the X-axis direction and the corresponding magnetic driving end, avoid the cooperation gap between the first guide part and the sliding groove being enlarged at the pushing piece when only the first guide part is arranged, so that the attraction parts cannot correctly attract the magnetic driving end along the X-axis direction, ensure that there is no air gap between the first part of the armature assembly and the second part formed in the coil assembly after the attraction parts attract the magnetic driving end, improve the magnetic efficiency, and increase the magnetic pushing force, thereby being beneficial to increase the safety distance between the moving contact group and the stationary contact group.

[0091] In the thirty-fourth technical solution, the projection of the second guide part on the first projection plane is circular, which is beneficial to avoid the jamming of the sliding cooperation between the second guide part and the sliding groove.

[0092] The thirty-fifth technical solution shows two specific embodiments of the thirty-first technical solution. Whether the first slot segment and the second slot segment are connected or not, since both of them are formed in the accommodating part, the sliding groove can be ensured to extend along the X-axis direction.

[0093] In the thirty-sixth technical solution, by arranging the micro switch, the on-off state of the relay can be known by the external relay state sensing circuit. It is convenient to manage the relay.

[0094] In the thirty-seventh technical solution, the static contact terminal is located between the moving spring and the coil winding along the X-axis direction, which can effectively utilize the space between the pushing member and the coil winding, avoid increasing the size of the accommodating member along the Y-axis direction when the static contact terminal is arranged outside the coil assembly along the Y-axis direction, and create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in limited space. The moving spring is fixed to the pushing member, so that the position and action of the moving spring are more determined.

[0095] In the thirty-eighth technical solution, the magnetic field of the coil assembly is compressed in the iron core and the yoke by arranging the shielding cover, the magnetic field strength between the two magnetic driving ends is improved, which is conducive to improving the magnetic efficiency and the pushing force of the magnetic circuit part, can create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in limited space, and can also avoid the influence of the external magnetic field on the magnetic circuit part.

[0096] The thirty-ninth technical solution has the technical effects of the technical solutions cited therein. BRIEF DESCRIPTION OF DRAWINGS

[0097] In order to more clearly illustrate the technical solutions of the embodiments, the following briefly introduces the drawings needed to be used:

[0098] Fig. 1 is a perspective exploded view of the relay in embodiment one;

[0099] Fig. 2 is a top view of the housing in embodiment one;

[0100] Fig. 3 is a perspective view of the cover body in embodiment one;

[0101] Fig. 4 is a perspective view of the static contact group in embodiment one;

[0102] Fig. 5 is a perspective view of the static magnetic conductor in embodiment one;

[0103] Fig. 6 is a top view of the static magnetic conductor in embodiment one;

[0104] Fig. 7 is a front view of the magnetic circuit part in embodiment one;

[0105] Fig. 8 is a top view of the coil assembly in embodiment one;

[0106] Fig. 9 is a top view of the armature assembly in embodiment one;

[0107] Fig. 10 is a right view of the armature assembly in embodiment one;

[0108] Fig. 11 is a perspective view of the shielding cover in embodiment one;

[0109] Fig. 12 is a state diagram of the magnetic circuit part when the armature assembly is in the magnetic holding state at the first position in embodiment one;

[0110] Fig. 13 is a schematic diagram of the magnetic circuit portion when the coil winding receives a first pulse electric signal in the embodiment one;

[0111] Fig. 14 is a schematic diagram of the magnetic circuit portion when the armature assembly moves to the second position in the embodiment one;

[0112] Fig. 15 is a schematic diagram of the magnetic circuit portion when the armature assembly is in the magnetic holding state at the second position in the embodiment one;

[0113] Fig. 16 is a schematic diagram of the magnetic circuit portion when the coil winding receives a second pulse electric signal in the embodiment one;

[0114] Fig. 17 is a schematic diagram of the magnetic circuit portion when the armature assembly moves to the first position in the embodiment one;

[0115] Fig. 18 is a top view of the movable contact portion in the embodiment one;

[0116] Fig. 19 is a front view of the pusher in the embodiment one;

[0117] Fig. 20 is an exploded view of the movable contact portion in the embodiment one;

[0118] Fig. 21 is a right view of the limiting member in the embodiment one;

[0119] Fig. 22 is a sectional view along A-A in Fig. 21;

[0120] Fig. 23 is a schematic diagram of the internal structure of the relay in the off state in the embodiment one;

[0121] Fig. 24 is a schematic diagram of the internal structure of the relay in the on state in the embodiment one;

[0122] Fig. 25 is a right view of the relay in the embodiment one;

[0123] Fig. 26 is a sectional view along B-B in Fig. 25;

[0124] Fig. 27 is a top view of the magnetic circuit portion in the embodiment two;

[0125] Fig. 28 is a perspective view of the armature assembly in the embodiment two;

[0126] Fig. 29 is a perspective view of the relay in the embodiment two.

[0127] 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, shell; 11, cover; 12, accommodating cavity; 13, sliding groove; 14, first groove section; 15, second groove section; 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 part; 25, first static contact point; 26, second overcurrent part; 27, third overcurrent part; 28, fourth overcurrent part; 29, fifth overcurrent part; 30, sixth overcurrent part; 27a, measurement terminal; 31, first connecting terminal; 32, seventh overcurrent part; 33, second static contact point; 34, eighth overcurrent part; 35, ninth overcurrent part; 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 part; 60, attraction part; 61, first attraction part; 62, second attraction part; 63, third attraction part; 64, fourth attraction part; 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 part; 79, accommodating part; 80, first embedding part; 81, second embedding part; 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 part; 93, elastic support; 94, frame body; 95, first elastic part; 96, first connecting hole; 97, first elastic arm; 98, main body; 99, second elastic part; 100, second connecting hole; 101, second elastic arm; 102, limiting body; 103, first guide part; 104, limiting part; 105, connecting part; 106, avoiding hole; 107, assembly hole; 108, bending part; 109, guide part; 110, static contact terminal; 111, fixed connection part; 112, first fixed connection part; 113, second fixed connection part; 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

[0128] In the claims and specification, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the features having one of the above directions are perpendicular to the features having 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, and the left side is front and the right side is back in the specification FIG. 23. The X-axis direction can also be divided into closing direction and opening direction. The closing direction means the movement direction when the moving contact group moves to the state of closing with the static contact group, that is, the direction from back to front, which is the direction from right to left in the specification FIG. 23. The opening direction means the movement direction when the moving contact group moves to the state of opening with the static contact group, that is, the direction from front to back, which is the direction from left to right in the specification FIG. 23. The Y-axis direction can be divided into left and right, and the upper side is left and the lower side is right in the specification FIG. 23. The Z-axis direction can be divided into up and down.

[0129] In the claims and specification, the terms "first", "second" or "third" and the like are used only to distinguish different objects, and are not used to describe a specific order, unless otherwise specified.

[0130] In the claims and specification, the terms "fixedly connected", "fixedly connected" or "relatively fixed" should be understood in a broad sense, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it means fixedly connected, fixedly connected, connected as a whole and fixedly connected through other devices or elements.

[0131] In the claims and specification, the terms "including", "having" and their variants mean "including but not limited to", unless otherwise specified.

[0132] In the claims and specification, the term "provided with" means that the technical feature located after it is part of the technical feature located before it, unless otherwise specified.

[0133] In the claims and specification, the term "group" means a set, which can include one element or multiple elements, unless otherwise specified. For example, the "moving contact group" can include one moving contact or more than two moving contacts.

[0134] In the claims and specification, the term "temporarily formed" means that the polarity of the magnetic driving end formed by the pulse electric signal disappears with the disappearance of the pulse electric signal, unless otherwise specified.

[0135] In the claims and specification, unless otherwise defined, the term "reversing" means that the polarity of the magnetic drive end temporarily formed by the coil winding this time is opposite to the polarity of the magnetic drive end temporarily formed by the coil winding last time, when the coil winding this time receives a pulse electric signal with a current direction different from the pulse electric signal 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 pulse electric signal with a current direction same as the pulse electric signal last time, the pulse electric signal this time is meaningless for control, and the state of the relay will not change.

[0136] In the claims and specification, unless otherwise defined, the term "back surface" means the surface facing away from the static contact group.

[0137] In the claims and specification, unless otherwise defined, the term "mounted" means connected directly or indirectly to each other.

[0138] Embodiment One

[0139] The relay 1 is used to receive an electric 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 pulse electric signal to control the on-off of an external circuit. In this embodiment, the pulse electric signal can be divided into a first pulse electric signal and a second pulse electric signal. The first pulse electric signal is used to control the external circuit to turn on correspondingly, and the second pulse electric signal is used to control the external circuit to turn off correspondingly. After receiving the first pulse electric signal, the relay 1 switches from the off state to the on state, and after the first pulse electric signal disappears, the relay 1 remains in the on state until the second pulse electric signal is received. After receiving the second pulse electric signal, the relay 1 switches from the on state to the off state, and after the second pulse electric signal disappears, the relay 1 remains in the off state until the first pulse electric 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.

[0140] 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 pulse electric signal and drive the moving contact part 4 to move based on the pulse electric 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.

[0141] As shown in FIG. 1, the fixed part 2 includes a housing 6, a static contact group 7, a static flux guide 8, and a barrier 9.

[0142] As shown in FIG. 1, the material of the accommodating member 6 is plastic, and the accommodating member 6 comprises a shell 10 and a cover 11.

[0143] Referring to FIG. 2, FIG. 2 shows the shell 10 in the embodiment. 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 blocking member 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 at the middle part along the Y-axis direction, and 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 blocking member groove 17. The rear of the two blocking member grooves 17 is respectively provided with an abutting surface 18 which is arranged forward.

[0144] Referring to FIG. 3, FIG. 3 shows the cover 11 in the embodiment. 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.

[0145] 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 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.

[0146] Referring to FIGS. 5 and 6, the static conductor 8 in this embodiment is shown. As shown in FIG. 5, the static conductor 8 extends along the Z-axis direction. As shown in FIG. 6, the surface of the static 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.

[0147] 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.

[0148] 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.

[0149] 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 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 "reversing" 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.

[0150] 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 symmetrical relative to a symmetry plane perpendicular to the Y-axis direction.

[0151] 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.

[0152] Referring to FIG. 12 to FIG. 17, the operation principle of the magnetic circuit part 3 in the present embodiment is shown.

[0153] 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.

[0154] 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 iron 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 iron 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] Fig. 16 shows the state of the magnetic circuit part 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 part 64 have the same S-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction part 64; since the second magnetic driving end 49 and the second attraction part 62 have the same N-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction part 62. In addition, the magnetic circuit part 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 part 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 part 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 part 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 part 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 part 64 and the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction part 62, but also due to the existence of the third push magnetic circuit and the fourth push magnetic circuit and the superposition effect between them, the first magnetic driving end 48 generates the magnetic attraction force to the first attraction part 61 and the second magnetic driving end 49 generates the magnetic attraction force to the third attraction part 63, so that the coil assembly 37 can form 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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 78 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 portion 78 is 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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 78 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.

[0168] 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 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 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 cooperating and fixing 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.

[0169] 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 or move 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 move away from the two stationary contact terminals based on the elastic restoring force of the movable spring 83 itself.

[0170] Referring to FIG. 23 and FIG. 26, the internal structure of the relay 1 in the embodiment is shown.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] The electric meter (not shown in the figure) in this embodiment uses the above-mentioned relay 1.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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 frame 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.

[0183] 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.

[0184] 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 drawn by the movable contact set 72 from the static contact set 7 due to the fault large current.

[0185] 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 travel 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.

[0186] In the embodiment, the first attracting portion 61 and the fourth attracting portion 64 are arranged along the X-axis direction, the third attracting portion 63 and the second attracting portion 62 are arranged along the X-axis direction, the first attracting portion 61 and the third attracting portion 63 are arranged along the Y-axis direction, and the fourth attracting portion 64 and the second attracting portion 62 are arranged along the Y-axis direction, so that the four attracting portions 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.

[0187] 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 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 thrust force between the attracting portions 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.

[0188] 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.

[0189] 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 flows 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.

[0190] In the embodiment, the number of the movable contacts 85 in the movable contact group 72 is more than two, and each movable contact 85 is arranged along the Z-axis direction, so that when the movable contact group 72 and the fixed 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 reduce the contact resistance between the movable contact 87 and the fixed 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 fixed contact group 7 in a limited space.

[0191] In the embodiment, the connecting terminal 21 of at least one fixed contact 19 is arranged between the fixed contact 20 and the coil winding 41 along the X-axis direction, which increases the distance between the two connecting terminals 21 along the X-axis direction, makes the two fixed contacts 19 less likely to be short-circuited, and can meet the needs of installing an external transformer.

[0192] In the embodiment, the eighth overcurrent part 34 of the second fixed 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 connecting 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 fixed contact group 7. This magnetic force makes the movable contact group 72 more reliably closed with the fixed contact group 7. Since the magnetic force increases with the increase of the current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from being separated from the fixed contact group 7, thereby avoiding the destructive pull arc to cause damage to the relay 1.

[0193] In the embodiment, the movable magnetic conductor group 73 and the fixed 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 fixed contact group 7. Since the magnetic force increases with the increase of the current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from being separated from the fixed contact group 7, thereby avoiding the destructive pull arc to cause damage to the relay 1.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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, the magnetic field strength of the static magnetic conductor 8 is strengthened, and 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.

[0198] 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 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.

[0199] 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 magnetic conductor 8 on the second projection plane, and the surface of the static magnetic conductor 8 facing the moving magnetic conductor group 73 is closer to the moving magnetic conductor 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 magnetic conductor 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 container 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 container 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.

[0200] In the embodiment, the two blocking pieces 9 are fixed to the container 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 container 6 along the Y-axis direction, ensuring the insulation performance of the container 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 the damage of the blocking piece 9, and is beneficial to improving the load capacity of the relay 1.

[0201] 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 the 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 the damage of 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, which helps the moving contact 85 to disconnect with the static contact group 7.

[0202] 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.

[0203] In the embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, which avoids the errors that may be generated in the assembly process of the armature assembly 38 and the pushing piece 70, and also makes the pushing piece 70 and the armature assembly 38 have a higher integration and fewer components, which is beneficial to fully utilizing the limited space.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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 moving 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 moving contact group 72 and the static contact group 7 in the limited space.

[0210] In the embodiment, the limiting part 76 abuts against the moving contact group 72 before the pushing part 70 moves into the overstroke along the closing direction X1, and when entering the overstroke, the moving 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 moving contact 85 along the X-axis direction can be better guided, the moving contact point 87 can correctly abut against the static contact point 20 along the X-axis direction, the contact resistance between the moving contact point 87 and the static contact point 20 is reduced, and the time of pulling the arc when the moving contact point 87 and the static contact point 20 are disconnected is shortened, which is beneficial to increase the service life of the moving 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 moving contact 72 along the X-axis direction, the matching gap will be enlarged during the movement of the moving contact 72, so that the moving contact point 87 cannot correctly abut against the static contact point 20 along the X-axis direction, thereby increasing the contact resistance between the moving contact point 87 and the static contact point 20, and the time of pulling the arc when the moving contact point 87 and the static contact point 20 are disconnected is longer, which is not conducive to the service life of the moving contact point 87 and the static contact point 20.

[0211] 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, the sliding groove 13 arranged 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.

[0212] 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 moving contact point 87 along the X-axis direction, which is more conducive to the moving contact point 87 to correctly abut against the static contact point 20 along the X-axis direction, reduces the contact resistance between the moving contact point 87 and the static contact point 20, and shortens the time of pulling the arc when the moving contact point 87 and the static contact point 20 are disconnected, which is beneficial to increase the service life of the moving contact point 87 and the static contact point 20.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] In this 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 pusher 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 pusher 70, so that the position and action of the moving spring 83 are more determined.

[0221] In this embodiment, by arranging the shielding cover 39, the magnetic field of the coil assembly 37 is compressed in the iron core 43 and the yoke 44, the magnetic field strength between the two magnetic driving ends 45 is improved, which is conducive to improving 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 can also avoid the magnetic circuit part 3 being affected by external magnetic field.

[0222] Embodiment Two

[0223] The difference between embodiment two and embodiment one is the magnetic circuit part 3. The rest is basically the same as embodiment one.

[0224] In the magnetic circuit part 3, the coil assembly 37 in embodiment two is the same as the coil assembly 37 in embodiment one. The difference lies in the armature assembly 38 and the shielding cover 39.

[0225] Referring to FIG. 27 and FIG. 28, the armature assembly 38 in the second embodiment is shown. As shown in FIG. 27 and FIG. 28, in the present embodiment, the number of permanent magnets 50 is one. The two magnetic poles 54 of the permanent magnet 50 are arranged along the Z-axis direction. The two armatures 51 are fixedly connected with the two magnetic poles 54 of the permanent magnet 50 respectively and correspond to one polarity respectively, and each is provided with two attracting portions 60. The first armature 57 and the second armature 58 are each provided with a fixed portion 111 fixed with one magnetic pole 54 of the permanent magnet 50. The fixed portion 111 of the first armature 57 is a first fixed portion 112, and the first fixed portion 112 is fixed with the first magnetic pole 55 of the permanent magnet 50. The fixed portion 111 of the second armature 58 is a second fixed portion 113, and the second fixed portion 113 is fixed with the second magnetic pole 56 of the permanent magnet 50. The two fixed portions 111 are perpendicular to the Z-axis direction and are in the shape of a plate. The two attracting portions 60 of each armature 51 extend from the fixed portion 111 along the Z-axis direction, specifically, the first attracting portion 61 and the second attracting portion 62 extend downward along the Z-axis direction from the left front side and the right rear side of the first fixed portion 112 respectively, and are each spaced apart from the permanent magnet 50 along the X-axis direction; the third attracting portion 63 and the fourth attracting portion 64 extend upward along the Z-axis direction from the right front side and the left rear side of the second fixed portion 113 respectively and are each spaced apart from the permanent magnet 50 along the X-axis direction. In order to increase the magnetic driving force, the size of the permanent magnet 50 can be increased. The magnetic circuit part 3 in the present embodiment has basically the same operating principle as the magnetic circuit part 3 in the first embodiment. In the present embodiment, the projection of the armature assembly on a first projection plane perpendicular to the Z-axis direction is mirror-symmetrical along a symmetry plane perpendicular to the Y-axis.

[0226] Referring to FIG. 29, the shielding cover 39 in the present embodiment is shown. As shown in FIG. 29, the shielding cover 39 is fixedly connected to the outer surface of the accommodating member 6 and covers the coil winding 41 outward along the Z-axis direction and the X-axis direction.

[0227] The second embodiment is a further improvement of the first embodiment. In the first embodiment, the permanent magnets 50 on both sides of the portion 59 along the Y-axis direction intersecting with each other, if formed by magnetizing the magnetic steel, the permanent magnets 50 on both sides need to be magnetized twice because the directions of the magnetic poles 54 are opposite along the X-axis direction. This will cause at least two problems, the first problem is the risk of the magnetic steel magnetization direction error, the second problem is that if the two magnetic steels are close along the Y-axis direction, the magnetic steel demagnetized in the first magnetization may be caused in the second magnetization, resulting in poor consistency of the magnetic parameters of the permanent magnets 50 on both sides. In the present embodiment, even if the number of permanent magnets 50 is more than one, because the magnetic poles 54 of the permanent magnets 50 are arranged along the Z-axis direction, the magnetic poles 54 of each permanent magnet 50 are the same along the Z-axis direction, so the magnetization can be completed at one time, thus solving the above two problems well, which is conducive to ensuring the consistency of the magnetic field strength of the attraction portions 60 on both sides of the armature assembly 38 along the Y-axis direction, and also can ensure that the two armatures 51 have a larger contact area with the permanent magnets 50 to improve the magnetic cross section and magnetic efficiency.

[0228] In the present embodiment, the number of permanent magnets 50 is only one, so the structure is simple, and the cost of the armature assembly 38 is reduced. The present embodiment is also conducive to increasing the size of the permanent magnets 50 along the Y-axis direction, the X-axis direction and the Z-axis direction, so that the magnetic holding force of the armature assembly 38 is larger, and the magnetic driving force of the magnetic driving end 45 on the armature assembly 38 is also larger, which can create more favorable conditions for increasing the safety distance between the moving contact set 72 and the static contact set 7 in a limited space.

[0229] In the present 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 both sides of the armature assembly 38 along the Y-axis direction is better, and the center of gravity is also easier to keep 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 can be created for increasing the safety distance between the moving contact set 72 and the static contact set 7 in a limited space.

[0230] 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 magnetic latching relay characterized by, The magnetic latching relay comprises: a fixed part comprising a housing and at least one fixed contact group; the fixed contact group is fixed to the housing and comprises two fixed contacts, each fixed contact is provided with a fixed contact point and a connecting terminal, the fixed contact points of the two fixed contacts are arranged along the Y-axis direction, and the connecting terminals of the two fixed contacts extend out of the housing along the Y-axis direction; a movable contact part comprising a movable contact group, the movable contact group is closed or disconnected with the fixed contact group along the X-axis direction; a magnetic circuit part comprising a coil assembly and an armature assembly; the coil assembly comprises a coil winding, the axis of the coil winding extends along the Y-axis direction, and when excited by a pulse electric signal, drives the armature assembly to move along the X-axis direction; the armature assembly drives the movable contact group to move and comprises two armatures, the projections of the two armatures on a first projection plane perpendicular to the Z-axis direction intersect each other.

2. A magnetic latching relay as claimed in claim 1, characterized in that The coil winding is provided with two magnetic driving ends, the two magnetic driving ends are arranged along the Y-axis direction; the coil winding reverses the polarity temporarily formed by the two magnetic driving ends when excited by a pulse electric signal, so as to switch the different parts of the two armatures attracted in the X-axis direction.

3. A magnetic latching relay as claimed in claim 2, characterized in that Each armature is provided with two attracting parts, the two attracting parts are arranged corresponding to the two magnetic driving ends, and the attracting parts are suitable for attracting the corresponding magnetic driving ends along the X-axis direction.

4. The magnetic latching relay of claim 3, wherein: the two armatures are respectively a first armature and a second armature, the two attracting parts of the first armature are respectively a first attracting part and a second attracting part, and the two attracting parts of the second armature are respectively a third attracting part and a fourth attracting part; the first attracting part and the third attracting part are arranged along the Y-axis direction, the fourth attracting part and the second attracting part are arranged along the Y-axis direction, the first attracting part and the fourth attracting part are arranged along the X-axis direction, and the third attracting part and the second attracting part are arranged along the X-axis direction; the armature assembly moves along the X-axis direction between a first position and a second position; in the first position, the first attracting part and the third attracting part attract the two magnetic driving ends respectively, so as to disconnect the movable contact group and the fixed contact group; in the second position, the fourth attracting part and the second attracting part attract the two magnetic driving ends respectively, so as to close the movable contact group and the fixed contact group.

5. A magnetic latching relay as claimed in claim 3, wherein the magnetic material is a ferrous material. The armature assembly further comprises a permanent magnet, and the two armatures are respectively fixed to two magnetic poles of the permanent magnet.

6. A magnetic latching relay as claimed in claim 5, characterized in that The number of the permanent magnets is at least two and is located on both sides of the part where the two magnetic poles intersect each other along the Y-axis direction, the two magnetic poles of the permanent magnet are arranged along the X-axis direction, and each armature is fixed to the magnetic pole of the same polarity of the permanent magnet.

7. A magnetic latching relay as claimed in claim 5, wherein the magnetic material is a ferrite material. The two magnetic poles of the permanent magnet are arranged along the Z-axis direction, each armature is provided with a fixed part fixed to the magnetic pole of the permanent magnet, and the two attracting parts extend from the fixed part along the Z-axis direction.

8. A magnetic latching relay as claimed in claim 7, characterized in that The number of the permanent magnets is one.

9. A magnetic latching relay according to any one of claims 5 to 8, wherein the magnetic latching relay is a magnetic latching solenoid relay. The projection of the armature assembly on the first projection plane is mirror symmetrical relative to a symmetry plane perpendicular to the Y-axis direction.

10. A magnetic latching relay as claimed in claim 1, wherein the magnetic latching relay is a magnetic latching solenoid relay. The movable contact group comprises a movable contact, the movable contact comprises an overcurrent bridge and two movable contact points, the overcurrent bridge extends along the Y-axis direction, the two movable contact points are fixed to the overcurrent bridge, the two movable contact points are arranged along the Y-axis direction and are opposite to the fixed contact points of the two fixed contacts along the X-axis direction.

11. A magnetic latching relay as claimed in claim 10, wherein the magnetic material is a ferrous material. The number of the movable contacts in the movable contact group is two or more, and each movable contact is arranged along the Z-axis direction.

12. A magnetic latching relay as claimed in claim 10, wherein the magnetic material is a ferrite material. The connecting terminals of the two static contacts are arranged along the X-axis direction; the connecting terminal of at least one static contact is located between the static contact and the coil winding along the X-axis direction; the static contact is provided with a cross-flow portion, which is located outside the moving contact group along the Y-axis direction and is connected to the connecting terminal along the opening direction; when the moving contact group and the static contact group are closed, the magnetic field formed by the current passing through the cross-flow portion acts on the overcurrent bridge and exerts a magnetic force on the moving contact towards the static contact group.

13. A magnetic latching relay as claimed in claim 10, characterized in that: The static magnet also includes a static magnet; The static magnet is fixed relative to one of the other components other than the moving contact group and the moving magnet group; The moving contact part includes a moving magnet group, which is fixed relative to the moving contact group and opposite the static magnet along the X-axis direction; When the moving contact group and the static contact group are closed, the moving magnet group and the static magnet form a magnetic circuit based on the current passing through the overcurrent bridge, so that the moving magnet group and the moving contact group are subjected to a magnetic force along the closing direction.

14. A magnetic latching relay as claimed in claim 13, characterized in that The moving magnet group includes a moving magnet corresponding to the moving contact, which is provided with a magnetically permeable body extending along the Z-axis direction and fixed to the back of the overcurrent bridge, and an extension portion extending from the magnetically permeable body along the closing direction.

15. A magnetic latching relay as claimed in claim 13, wherein the magnetic latching relay is a magnetic latching solenoid relay. The static magnet is fixed to the accommodating member.

16. A magnetic latching relay as claimed in claim 15, wherein the magnetic material is a ferrous material. The static contact points of the two static contacts are respectively located on both sides of the static magnet along the Y-axis direction.

17. A magnetic latching relay as claimed in claim 16, wherein the magnetic material is a ferrous material. At least one static contact is provided with a reverse flow portion extending along the Y-axis direction, and the flow direction of the reverse flow portion is opposite to that of the overcurrent bridge; the static magnet is located between the reverse flow portion and the moving magnet group along the X-axis direction.

18. A magnetic latching relay as claimed in claim 16, wherein the magnetic material is a ferrite material. The static contact extends from a first surface of the static contact perpendicular to the X-axis direction, and the static magnet is provided with a second surface opposite the moving magnet group and perpendicular to the X-axis direction, and the second surface is closer to the moving magnet group along the X-axis direction than the first surface.

19. A magnetic latching relay as claimed in claim 16, wherein the magnetic latching relay is a magnetic latching solenoid relay. The projections of the portions of all the static contact points adapted to contact the moving contact group on a second projection plane perpendicular to the Y-axis direction are located within the projection of the static magnet on the second projection plane, and the surface of the static magnet facing the moving magnet group is closer to the moving magnet group along the X-axis direction than all the static contact points.

20. A magnetic latching relay as claimed in claim 10, wherein the magnetic latching relay is a magnetic latching solenoid relay. The fixing part further includes two blocking members fixed to the accommodating member and located outside the static contact group along the Y-axis direction, each blocking member extending along the X-axis direction so that the projections of the portions of each static contact point adapted to contact the moving contact point on a second projection plane perpendicular to the Y-axis direction are located within the projection of each blocking member on the second projection plane. The blocking member is made of high-temperature-resistant insulating material.

21. A magnetic latching relay as claimed in claim 10, wherein the magnetic latching relay is a magnetic latching solenoid relay. The moving contact part further includes a pushing member, an elastic support group and a limiting member; the pushing member is fixed to the armature assembly; the elastic support group is arranged on the pushing member and located between the pushing member and the moving contact group along the X-axis direction; the limiting member is fixed relative to the pushing member and abuts against the moving contact group along the opening direction when the moving contact group and the static contact group are opened.

22. A magnetic latching relay as claimed in claim 21, wherein the magnetic material is a ferrous material. The armature assembly and the pushing member are integrally formed by insert injection molding.

23. A magnetic latching relay as claimed in claim 22, wherein the magnetic material is a ferrous material. The moving contact part further includes a connecting member integrally formed with the pushing member by insert injection molding; the connecting member extends along the Z-axis direction, and its two ends respectively protrude from the pushing member to form two connecting ends, and the limiting member is fixed to the connecting ends. The armature assembly and the pushing member are integrally formed by insert injection molding.

24. A magnetic latching relay as claimed in claim 21, wherein the magnetic material is a ferrite material. The elastic support set comprises elastic supports, each of which is provided with a support body and a first elastic part. The support body is fixed relative to the pusher. The first elastic part is adapted to deform along the X-axis direction and is arranged correspondingly to the moving contact.

25. A magnetic latching relay as claimed in claim 24, wherein the magnetic material is a ferrous material. The first elastic part comprises two first elastic arms. One end of each of the first elastic arms is integrated with the support body. The other end of each of the first elastic arms is fixed to the back of the overcurrent bridge at a position corresponding to the moving contact.

26. A magnetic latching relay as claimed in claim 21, wherein the magnetic material is a ferrite material. The moving contact part further comprises an elastic member. The elastic member is adapted to abut against the accommodating member. The elastic member deforms to store energy when the pusher moves in the disconnecting direction. The elastic member restores deformation to release energy when the pusher moves in the closing direction.

27. A magnetic latching relay as claimed in claim 26, wherein the magnetic material is a ferrous material. The elastic member is provided with a main body and a second elastic part. The main body is in the shape of a sheet perpendicular to the X-axis direction and is fixed relative to the pusher. The second elastic part is adapted to deform along the X-axis direction. The second elastic part comprises two second elastic arms. One end of each of the second elastic arms is integrated with the main body. The other end of each of the second elastic arms extends to the two sides of the Y-axis direction and is adapted to abut against the accommodating member.

28. A magnetic latching relay as claimed in claim 23, wherein the magnetic material is a ferrite material. One of the moving contact part and the accommodating member is provided with a guide part. The other of the moving contact part and the accommodating member is provided with a sliding groove in sliding cooperation with the guide part along the X-axis direction. The guide part extends into the sliding groove along the Z-axis direction and is centrally located between the two moving contacts of the moving contact part along the Y-axis direction.

29. A magnetic latching relay as claimed in claim 28, wherein the magnetic material is a ferrous material. The guide part comprises two first guide parts. The number of the sliding grooves is two. The first guide parts are formed on the limiting member. The limiting member further comprises a limiting body. The two first guide parts extend into the corresponding sliding grooves from the limiting body along the Z-axis direction and away from each other.

30. A magnetic latching relay as claimed in claim 29, wherein the magnetic material is a ferromagnetic material. The first guide parts are located at the front of the limiting body along the closing direction.

31. A magnetic latching relay as claimed in claim 29, wherein the magnetic material is a ferromagnetic material. The projection of the first guide part on the first projection plane is circular.

32. A magnetic latching relay as claimed in claim 29, wherein the magnetic material is a ferrite material. The material of the first guide parts is plastic. The material of the limiting body is metal. The two first guide parts and the limiting body are integrally formed by insert injection molding.

33. A magnetic latching relay as in claim 29, wherein the magnetic material is a ferrite material. The guide part further comprises a second guide part. The second guide part is formed on the pusher. The pusher further comprises a pushing body. The two second guide parts extend into the corresponding sliding grooves from the pushing body along the Z-axis direction and away from each other.

34. A magnetic latching relay as claimed in claim 33, wherein the magnetic material is a ferrous material. The projection of the second guide part on the first projection plane is circular.

35. A magnetic latching relay as claimed in claim 33, wherein the magnetic material is a ferromagnetic material. Each of the sliding grooves is divided into a first groove segment adapted to slide with the first guide part and a second groove segment adapted to slide with the second guide part. The first groove segment and the second groove segment are connected or separated along the X-axis direction.

36. A magnetic latching relay as claimed in claim 22, wherein the magnetic material is a ferrite material. The micro switch further comprises a moving spring and two static contact terminals. The static contact terminals are fixed to the accommodating member and penetrate the accommodating member along the Z-axis direction. The two static contact terminals are arranged along the Y-axis direction. The moving spring is driven by the moving contact part to abut against the two static contact terminals along the X-axis direction and is driven by the moving contact part or away from the two static contact terminals based on the elastic restoring force.

37. A magnetic latching relay as claimed in claim 36, wherein the magnetic material is a ferromagnetic material. The moving spring is fixed to the pusher. The two static contact terminals are located between the moving spring and the coil winding along the X-axis direction.

38. A magnetic latching relay as claimed in claim 1, wherein the magnetic material is a ferrite material. The coil assembly comprises a shielding cover. The shielding cover is fixed to the accommodating member and covers the two sides of the coil winding along the Z-axis direction and covers the rear of the coil winding along the X-axis direction.

39. An electrical meter, characterized by The magnetic latching relay comprises any one of the magnetic latching relays according to claims 1 to 38.

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