Magnetic circuit part, magnetic latching relay and electricity meter

Abstract

The invention discloses a magnetic circuit part, a magnetic latching relay and an electric meter. The magnetic circuit part comprises a coil assembly and an armature assembly; the coil assembly is provided with two magnetic driving ends arranged in the Y-axis direction. The armature assembly comprises a permanent magnet part and two armatures, two magnetic poles of the permanent magnet part are arranged in the Z-axis direction, the two armatures are fixedly connected with the two magnetic poles of the permanent magnet part respectively and correspond to one polarity respectively, each armature is provided with two attraction parts, and each attraction part is suitable for attracting the corresponding magnetic driving end in the X-axis direction; the coil assembly is excited by a pulse electric signal to reverse the polarity temporarily formed by the two magnetic driving ends so as to switch and attract different parts of the two armatures in the X-axis direction and drive the armature assembly to move in the X-axis direction. The magnetic latching relay and the ammeter comprise the magnetic circuit part. By adopting the technical scheme, compared with the prior art, more favorable conditions are created for increasing the safety distance between the movable contact group and the static contact group in a limited space.

Description

Technical Field

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

[0002] Smart meters generally integrate wiring elements, communication units, measurement units, control units, and execution units in the meter case. As the main component of the execution unit, the relay is controlled by the control unit and acts on the wiring unit to switch the external circuit on and off. In order to save electricity, the relays in smart meters generally use magnetic latching relays. Due to the limited space in the meter case and the high degree of integration, the space that the relay can occupy in the meter case is very limited, that is, the space occupied by the relay in the meter case in the X-axis direction, the Y-axis direction, and the Z-axis direction cannot be too large. The relay is equipped with a moving contact group and a static contact group for controlling the on and off of the circuit. Smart meters place higher requirements on the load capacity of magnetic latching relays. In order to adapt to the increase in load capacity, the safety distance between the moving contact group and the static contact group needs to be increased accordingly. For ordinary relays in which the moving contact group and the static contact group are respectively connected to the load terminals, 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 along the disconnection direction 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 magnetic latching relays. However, it is difficult to increase the safety distance between the moving contact group and the static contact group in the limited space for both types of magnetic latching relays in the prior art.

[0004] The swing-type magnetic latching relay includes a fixed part, a magnetic circuit part and a moving contact part. The fixed part generally includes a container and a static contact group. The magnetic circuit part includes a coil assembly fixed relative to the container and an armature assembly swinging relative to the container. The coil assembly generally includes a coil winding, an iron core and two yokes. The iron core is placed in the coil winding, and the two yokes are fixed to the two ends of the iron core. The ends of the two yokes away from the iron core form two magnetic drive ends, and the two magnetic drive ends are arranged along the first direction. The armature assembly includes a permanent magnet and two armatures, and the permanent magnet and the two armatures are arranged in an I-shaped layout. The two armatures are parallel to each other and the permanent magnet is clamped therein. The coil winding is stimulated by a pulse electrical signal to reverse the polarity temporarily formed by the two magnetic drive ends to drive the armature assembly to swing relative to the container around a rotation axis perpendicular to the first direction. The moving contact part includes a rocker, a pusher and a moving contact group. The rocker is fixed to the armature assembly. The armature assembly drives the rocker arm to swing around the axis of rotation and moves the push card to move linearly in the tangential direction of the swing stroke, so that the moving contact group and the static contact group in the contact part are closed or disconnected, and the external circuit is turned on or off accordingly. In the above technical scheme, only the tangential component of the swing stroke of the rocker arm can be transmitted to the push member, and the radial component of the swing stroke of the rocker arm is lost. At this time, if it is necessary to increase the safety distance between the moving contact group and the static contact group, it is necessary to increase the linear motion stroke of the push member, and accordingly, it is necessary to increase the tangential component in the swing stroke of the rocker arm. In order to increase the tangential component of the swing stroke of the rocker arm, one solution is to lengthen the radial length of the rocker arm, and the other solution is to increase the rotation angle of the rocker arm. Regardless of which solution is used, it will result in an increase in the space required for the swing of the rocker arm and a 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 safe distance between the moving contact group and the stationary contact group, the volume of the relay needs to be increased, and the magnetic driving force between the magnetic drive end and the armature assembly needs to be increased, which in turn will lead to an increase in the energy consumption of the relay and an increase in the volume and weight of the permanent magnet, thereby requiring a further increase in the volume of the relay. For the above reasons, the swing type magnetic latching relay in the prior art is difficult to meet the demand for increasing the safe distance between the moving contact group and the stationary contact assembly in a limited space.

[0005] The direct-acting magnetic latching relay in the prior art also includes a fixed part, a magnetic circuit part and a moving contact part. Among them, the fixed part includes a container and a static contact group. The magnetic circuit part includes a coil winding, a static iron core, a yoke iron plate, a yoke iron cylinder, a permanent magnet and an armature. The coil winding, the static iron core, the yoke iron plate, the yoke iron cylinder and the permanent magnet are fixed to the container, and the armature moves linearly relative to the housing between the yoke iron plate and the static iron core. The moving contact part includes a push rod fixed to the armature, a push member fixed to the push rod and a moving contact group installed on the push member. The push rod moves linearly with the armature and drives the push member and the moving contact group to close or disconnect with the static contact group, and accordingly turns on or off the external circuit. The direct-acting magnetic latching relay in the prior art is arranged with a push rod, an armature, a coil winding and a yoke iron cylinder in sequence from the inside to the outside in the radial direction. Therefore, the diameter of the coil frame support shaft of the direct-acting magnetic latching relay in the prior art is relatively large. Since the coil winding is arranged along the movement direction of the push rod, the armature also moves between the yoke iron plate and the static iron core along the movement direction of the push rod. Therefore, the length of the direct-acting magnetic latching relay in the prior art along the movement direction of the push rod is much longer than that of the swing-type magnetic latching relay. If it is necessary to increase the safety distance between the moving contact group and the static contact group, it is necessary to increase the already long length of the direct-acting magnetic latching relay in the prior art. In addition, when it is necessary to increase the safety distance between the moving contact group and the static contact group, it is necessary to increase the driving force of the magnetic circuit part, thereby increasing the number of turns of the coil winding and the volume of the permanent magnet, resulting in a further increase in its volume. At the same time, since the relative sliding between the armature and the permanent magnet in the direct-acting magnetic latching relay in the prior art will form an air gap, the magnetic efficiency is low, and the required driving force is greater. Therefore, it is also difficult for the direct-acting magnetic latching relay in the prior art to meet the demand for increasing the safety distance between the moving contact group and the static contact group in a limited space. Summary of the invention

[0006] The purpose of the present application is to overcome the above-mentioned defects or problems existing in the background technology and to provide a magnetic circuit part, a magnetic holding relay and an electric meter, which can create more favorable conditions for increasing the safe distance between the moving contact group and the static contact group in a limited space.

[0007] In order to achieve the above purpose, the following technical solutions are adopted:

[0008] The first technical solution involves a magnetic circuit part, which includes a coil assembly and an armature assembly; the coil assembly is provided with two magnetic drive ends arranged along the Y-axis direction; the armature assembly includes a permanent magnet and two armatures, the two magnetic poles of the permanent magnet are arranged along the Z-axis direction, the two armatures are respectively fixed to the two magnetic poles of the permanent magnet and correspond to a polarity respectively, and are each provided with two suction parts, each suction part is suitable for suctioning the corresponding magnetic drive end along the X-axis direction; the coil assembly is excited by a pulse electrical signal to reverse the polarity temporarily formed by the two magnetic drive ends, so as to switch and suction different positions of the two armatures in the X-axis direction and drive the armature assembly to move along the X-axis direction.

[0009] The second technical solution is based on the first technical solution, wherein each armature is provided with a fixing portion fixed to the magnetic pole of the permanent magnet, and two suction portions are extended from the fixing portion along the Z-axis direction.

[0010] The third technical solution is based on the second technical solution, wherein a suction part avoidance structure is formed at the top end of each suction part along its extension direction, and the suction part avoidance structures of the two suction parts of the fixed part of each armature corresponding to the other armature form a fixed part avoidance structure; through the suction part avoidance structure and the corresponding fixed part avoidance structure, a gap is formed between the top end of each suction part of each armature and the fixed part of the other armature along the X-axis direction and the Y-axis direction.

[0011] The fourth technical solution is based on the third technical solution, wherein the fixing portion avoidance structure is a fixing portion corner notch, and the suction portion avoidance structure is a suction portion corner notch.

[0012] The fifth technical solution is based on the fourth technical solution, wherein the corner notch of the fixing portion is formed by setting an inclined surface parallel to the Z-axis direction on the fixing portion, and the corner notch of the suction portion is formed by setting an inclined surface parallel to the X-axis direction on the suction portion.

[0013] The sixth technical solution is based on any one of the third to fifth technical solutions, wherein the top end of the suction portion of each armature is flush with or exceeds the surface where the fixing portion of another armature is fixed to the magnetic pole of the permanent magnet along the extension direction of the suction portion.

[0014] The seventh technical solution is based on the second technical solution, wherein each armature is formed by bending a plate or sheet.

[0015] The eighth technical solution is based on the second technical solution, wherein the dimension of the junction between the suction part and the fixing part along the Y-axis direction is a first dimension; the dimension of the junction between the fixing part and the magnetic pole of the permanent magnet part along the X-axis direction is a second dimension, and the ratio of the first dimension to the second dimension is between 0.6 and 1.4.

[0016] The ninth technical solution is based on the first technical solution, wherein the number of permanent magnets is at least two, and the magnetic poles of each permanent magnet have the same polarity direction.

[0017] The tenth technical solution is based on the first technical solution, wherein the number of permanent magnet components is one.

[0018] The eleventh technical solution is based on the first technical solution, wherein the projection of the armature assembly on the first projection plane is mirror-symmetric relative to a symmetry plane perpendicular to the Y-axis direction.

[0019] The twelfth technical solution is based on the first technical solution, wherein the two armatures are respectively the first armature and the second armature, the two suction parts of the first armature are respectively the first suction part and the second suction part, and the two suction parts of the second armature are respectively the third suction part and the fourth suction part; the armature assembly moves between the first position and the second position along the X-axis direction; in the first position, the first suction part and the third suction part respectively suction the two magnetic drive ends; in the second position, the fourth suction part and the second suction part respectively suction the two magnetic drive ends.

[0020] The thirteenth technical solution is based on the twelfth technical solution, wherein the first suction part and the third suction part are arranged along the Y-axis direction, the fourth suction part and the second suction part are arranged along the Y-axis direction, the first suction part and the fourth suction part are arranged along the X-axis direction, and the third suction part and the second suction part are arranged along the X-axis direction.

[0021] The fourteenth technical solution is based on the first technical solution, wherein the coil assembly includes a coil winding, an iron core and two yokes; the axis of the coil winding extends along the Y-axis direction; the iron core is placed in the coil winding along the Y-axis direction, one end of the two yokes is fixed to the iron core, and the other end forms the magnetic drive end.

[0022] The fifteenth technical solution relates to a magnetic holding relay, which includes a static contact group, a moving contact group and a magnetic circuit portion as described in any one of the first to fourteenth technical solutions; the static contact group includes two static contacts; the moving contact group is driven by the armature assembly to close or disconnect with the static contact group along the X-axis direction to turn on or off the electrical connection between the two static contacts.

[0023] The sixteenth technical solution relates to an electric meter, which includes the magnetic holding relay as described in the fifteenth technical solution.

[0024] Compared with the prior art, the above solution has the following beneficial effects:

[0025] Compared with the swing-type magnetic latching relay in the prior art, the first technical solution does not lose the radial component of the swing stroke of the swing-type magnetic latching relay because the armature assembly moves linearly relative to the coil assembly. Therefore, the space utilization rate of the relay can be higher, and more favorable conditions can be created for increasing the safe distance between the moving contact group and the static contact group in a limited space.

[0026] Compared with the direct-acting magnetic latching relay in the prior art, the first technical solution has two magnetic drive ends arranged along the Y-axis direction. Therefore, the axis of the coil winding can be set to extend along the Y-axis direction. At the same time, the linear movement direction of the armature assembly is the X-axis direction perpendicular to the Y-axis direction. Such a layout is conducive to making room for the movement of the armature assembly and the moving contact group along the X-axis. At this time, the size of the accommodating part 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 will not require a long length for the relay in one direction (whether it is the X-axis direction or the Y-axis direction), which can make the relay more easily adapt to limited space and create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0027] Compared with the direct-acting magnetic latching relay in the prior art, the first technical solution does not need to be inserted into the push rod and the moving iron core in the coil winding, so the support shaft diameter of the coil frame is smaller and the inner diameter of the coil winding is smaller. Therefore, compared with the direct-acting magnetic latching relay in the prior art, when the space occupied by the coil assembly is the same, the magnetic driving force generated by the coil winding is stronger, and the driving force on the armature assembly is greater, 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.

[0028] In the first technical solution, the two suction parts of the armature assembly can form a first part of a magnetic circuit without any air gap through the permanent magnet and the two armatures, and the two magnetic drive ends of the coil assembly can also form a second part of a magnetic circuit that runs through the entire coil assembly. In the magnetic holding state, the suction part attracts the corresponding magnetic drive end along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without an air gap, so the magnetic loss is small and the magnetic efficiency is higher. Without increasing the power consumption of the coil assembly, it is beneficial to increase the movement stroke of the moving contact group; and when the magnetic driving force is equivalent, it can reduce the power consumption required for the coil assembly to achieve magnetic drive, which is beneficial to make the size of the coil assembly smaller. Therefore, it can create more favorable conditions for increasing the safe distance between the moving contact group and the static contact group in a limited space.

[0029] The direct-acting magnetic latching relay in the prior art often forms two magnetic circuits that resist each other in the magnetic latching state, one of which passes through the yoke iron plate and the other passes through the static iron core. The magnetic forces of the two magnetic circuits on the moving iron core are in opposite directions. The second part of the magnetic circuit in the second technical solution passes through the entire coil assembly, and the above problem does not exist. Therefore, compared with the direct-acting magnetic latching relay in the prior art, the magnetic force during magnetic latching is greater, especially when the relay is impacted by a large fault current, the armature assembly is less likely to break away from the magnetic latching state and move, which is beneficial to avoid the moving contact group from breaking away from the static contact group due to the large fault current, resulting in destructive arcing.

[0030] In the first technical solution, the magnetic poles of the permanent magnet are arranged along the Z-axis direction, and the two armatures are fixedly connected to the two magnetic poles of the permanent magnet respectively corresponding to one polarity, and each of them is provided with two suction parts, each suction part is suitable for suctioning the corresponding magnetic drive end along the X-axis direction; so that even if the armature assembly has only one permanent magnet, it can achieve a balance of magnetic field strength on both sides along the Y-axis direction.

[0031] In the second technical solution, the two suction parts extend from the fixed part along the Z-axis direction. Through the spatial layout of the entire armature assembly, the suction part extending along the Z-axis direction can be suctioned with the magnetic drive end along the X-axis direction, thereby fully utilizing the space in the Z-axis direction, and being able to control the dimensions of the armature assembly along the X-axis direction and the dimensions along the Y-axis direction, thereby being able to create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space. Here, "the suction part extends from the fixed part along the Z-axis direction" means that the suction part as a whole extends from the edge of the fixed part along the Z-axis direction. Therefore, it is possible to avoid a sudden change in the magnetic conductive cross-section due to the perpendicular extension direction between the fixed part and the suction part.

[0032] In the third technical solution, each suction part and the fixed part of another armature are spaced apart along the X-axis direction and along the Y-axis direction through the suction part avoidance structure and the fixed part avoidance structure. Compared with only providing the avoidance structure on the suction part but not on the fixed part, it can avoid that the suction area with the magnetic drive end is reduced due to the small size of the suction part along its extension direction. The reduction in the suction area will lead to a reduction in the suction force at one end of the suction part away from the fixed part of the same armature, thereby causing the armature assembly to form a rotational force perpendicular to the X-axis direction relative to the coil assembly, and the magnetic suction effect is not reliable.

[0033] In the third technical scheme, each suction part and the fixed part of another armature form a gap along the X-axis direction and a gap along the Y-axis direction through the suction part avoidance structure and the fixed part avoidance structure. Compared with only providing the avoidance structure in the fixed part but not in the suction part, it can be avoided that; the length of one of the fixed part and the suction part along the Y-axis direction is reduced, thereby avoiding the weaker magnetic attraction and magnetic holding force due to the inability to increase the volume of the permanent magnet part, and avoiding the smaller magnetic conductive cross-section due to the reduction in the size of the junction between the fixed part and the suction part along the Y-axis direction. The smaller magnetic conductive cross-section will lead to an increase in magnetic resistance, a decrease in magnetic conductivity efficiency, a slower response speed of the armature assembly and a weakening of the magnetic attraction and magnetic holding force.

[0034] Specifically, in the armature assembly, since the two armatures are respectively fixed to the two magnetic poles of the permanent magnet and are used to bear different polarities, the design of the armature assembly usually needs to consider the isolation of the two armatures, that is, in the armature assembly, the two armatures cannot directly contact each other, otherwise it will cause a magnetic short circuit, and lead to a decrease in magnetic efficiency and the required magnetic holding force, which is not conducive to improving the stability and anti-interference strength of the relay. In the third technical solution, each suction part and the fixed part of another armature are designed to be spaced along the X-axis direction and the Y-axis direction. Therefore, the length of the fixed part along the Y-axis direction can be set to be more than not limited to the spacing between the two suction parts arranged along the Y-axis direction. The length of the two suction parts extending along the Z-axis direction can also be set to be longer, and the length of the intersection of the suction part and the fixed part along the Y-axis direction can also be set to be larger, wherein the increase in the size of the fixed part along the Y-axis direction is conducive to the arrangement of a larger volume of permanent magnets, thereby improving the magnetic efficiency and the magnetic holding force that can be obtained; the length of the two suction parts extending along the Z-axis direction is set to be longer, so that the area of ​​the suction part used to attract the magnetic drive end is larger, the magnetic attraction force is larger, and the magnetic attraction stability is also higher; the length of the intersection of the suction part and the fixed part along the Y-axis direction is set to be larger, which is conducive to uniformly changing the magnetic conductive area, reducing magnetic resistance, and improving magnetic conductive efficiency and magnetic attraction.

[0035] In the fourth and fifth technical solutions, the missing corners of the fixing part and the missing corners of the suction part are formed by inclined surfaces, and then the fixing part avoidance structure and the suction part avoidance structure are formed accordingly, so that the transition of the magnetic conductive cross-section of the fixing part and the suction part is uniform, which can reduce leakage magnetic flux, ensure magnetic efficiency, and keep the suction surface of the suction part at a larger size, so that the volume of the permanent magnet can be increased, so that the magnetic conductive efficiency is higher, and the magnetic attraction and magnetic holding force are greater.

[0036] In the sixth technical solution, since the fixed part and the suction part are avoided at the same time, the top of the suction part of each armature can be made flush with or exceed the surface of the fixed part of another armature and the magnetic pole of the permanent magnet along its extension direction, thereby ensuring the suction area between the suction part and the magnetic drive end, avoiding or reducing the rotational force of the armature assembly.

[0037] In the seventh technical solution, both armatures are formed by bending plates or sheets, which can reduce the manufacturing difficulty and cost, and have material consistency, avoiding changes in the magnetic cross-section due to material splicing.

[0038] In the eighth technical solution, the ratio of the first dimension to the second dimension is between 0.6 and 1.4, which can ensure that the overall magnetic conductivity efficiency of the armature is relatively consistent at the key position, and avoid reducing the magnetic conductivity cross-section and lowering the magnetic efficiency due to inconsistent extension directions of the suction part and the fixed part and a large difference between the first dimension and the second dimension.

[0039] Compared with the technical solution in which the two magnetic poles of the permanent magnet are arranged along the X-axis direction, the two armatures cross each other on the first projection plane of the permanent magnet perpendicular to the Z-axis direction, and the two permanent magnets are located on both sides of the intersecting parts along the Y-axis direction, each permanent magnet can be magnetized once, so the magnetization errors or poor consistency of magnetic parameters of each permanent magnet caused by two magnetizations can be avoided. This is because if the permanent magnets located on both sides of the intersecting parts along the Y-axis direction are formed by magnetizing magnetic steel, the permanent magnets on both sides need to be magnetized twice to complete because the magnetic pole directions are opposite along the X-axis direction. This will lead to at least two problems. The first problem is that there is a risk of incorrect magnetization direction of the magnetic steel. The second problem is that if the two magnetic steels are close in the Y-axis direction, the second magnetization may cause the magnetic steel demagnetization during the first magnetization, resulting in poor consistency of magnetic parameters of the permanent magnets on both sides. In the present technical solution, since the magnetic poles of the permanent magnets are arranged along the Z-axis direction, the polarity directions of the magnetic poles of each permanent magnet are the same along the Z-axis direction, and thus magnetization can be completed in one time, which can well solve the above two problems and is conducive to ensuring that the magnetic field strength of the suction part on both sides of the armature assembly along the Y-axis direction is consistent, while also ensuring that the two armatures have a larger contact area with the permanent magnets to improve the magnetic conductive cross section and magnetic efficiency.

[0040] In the tenth technical solution, there is only one permanent magnet, so the structure is simple, the cost of the armature assembly is reduced, and there will be no problem caused by double magnetization. In addition, the seventh technical solution is also conducive 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 greater, and the magnetic driving force of the magnetic drive end on the armature assembly is also greater, which can create more favorable conditions for increasing the safe distance between the moving contact group and the static contact group in a limited space.

[0041] In the eleventh 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 magnetic field strength of the armature assembly on both sides of the Y-axis direction is more consistent, and the center of gravity is easier to maintain on the symmetry plane. The linear motion of the armature assembly is less likely to skew, the relay is less likely to get stuck and has a longer 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.

[0042] In the twelfth technical solution, when the armature assembly is in a magnetic holding state at the first position, when the coil assembly is stimulated by a pulse electric signal to reverse the polarity temporarily formed by the two magnetic drive ends, not only do the two magnetic drive ends generate magnetic repulsion on the first suction part and the third suction part, but also the first part of the pushing magnetic circuit without an air gap is formed between the fourth suction part and the second suction part through the armature assembly, and the two magnetic drive ends form the second part of the pushing magnetic circuit that runs through the entire coil assembly through the coil assembly. The first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit, in which there is only a necessary stroke air gap and no other air gaps, so the magnetic efficiency is higher, and the two magnetic drive ends exert a stronger magnetic drive force on the armature assembly under the same power consumption, which is more conducive to increasing the safety distance between the moving contact group and the static contact group. Similarly, when the armature assembly is in a magnetic holding state at the second position, when the coil assembly is stimulated by a pulse electric signal to reverse the polarity temporarily formed by the two magnetic drive ends, it also has the same technical effect.

[0043] In the thirteenth technical solution, since the first suction part and the fourth suction part are arranged along the X-axis direction, the third suction part and the second suction part are arranged along the X-axis direction, the first suction part and the third suction part are arranged along the Y-axis direction, and the fourth suction part and the second suction part are arranged along the Y-axis direction, the four suction parts of the armature assembly are respectively located at the four vertices of the rectangle on the first projection plane, which is convenient for adjusting the dimensions of the armature assembly along the X-axis direction and the Y-axis direction, creating more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0044] In the fourteenth technical solution, since the axis of the coil winding extends along the Y-axis direction and the two magnetic drive ends are arranged along the Y-axis direction, and the linear movement direction of the armature assembly is the X-axis direction perpendicular to the Y-axis direction, such a layout is conducive to making room for the movement of the armature assembly and the moving contact group along the X-axis. Therefore, the first technical solution will not require a long length for the relay in one direction (whether in the X-axis direction or the Y-axis direction), which can make the relay more easily adapt to limited space and create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0045] The fifteenth technical solution is a specific implementation method of applying the above-mentioned magnetic circuit part to a magnetic latching relay, and therefore has the technical effect corresponding to the technical solution cited. The moving contact group is closed or disconnected with the static contact group along the X-axis direction to correspondingly conduct or disconnect the electrical connection between the two static contacts. Under this structure, the safety distance between the moving contact group and the static contact group is twice the actual distance between the moving contact and the corresponding static contact along the X-axis direction. Therefore, the relay has higher safety and stronger load capacity, which is more conducive to improving the safety distance between the moving contact group and the static contact group.

[0046] The sixteenth technical solution has the technical effect of the fifteenth technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solution of the embodiment, the following briefly introduces the drawings required for use:

[0048] Figure 1 It is a three-dimensional exploded view of the relay in the first embodiment;

[0049] Figure 2 is a top view of the housing in the first embodiment;

[0050] Figure 3 is a three-dimensional diagram of the cover body in the first embodiment;

[0051] Figure 4 is a three-dimensional diagram of the static contact assembly in the first embodiment;

[0052] Figure 5 is a three-dimensional diagram of the static conductive magnet in Example 1;

[0053] Figure 6 is a top view of the static conductive magnet in Example 1;

[0054] Figure 7 It is a front view of the magnetic circuit part in the first embodiment;

[0055] Figure 8 is a top view of the coil assembly in Example 1;

[0056] Fig. 9 is a top view of the armature assembly in the first embodiment;

[0057] Fig.10 It is a right side view of the armature assembly in the first embodiment;

[0058] Fig.11 is a three-dimensional diagram of the shielding cover in the first embodiment;

[0059] Fig.12 It is a schematic diagram of the state of the magnetic circuit part when the armature assembly is in the magnetic holding state at the first position in the first embodiment;

[0060] Fig.13 It is a schematic diagram of the state of the magnetic circuit part when the coil winding receives the first pulse electrical signal in the first embodiment;

[0061] Fig.14 It is a schematic diagram of the state of the magnetic circuit part when the armature assembly moves to the second position in the first embodiment;

[0062] Fig.15 It is a schematic diagram of the state of the magnetic circuit part when the armature assembly is in the magnetic holding state at the second position in the first embodiment;

[0063] Fig.16 It is a schematic diagram of the state of the magnetic circuit part when the coil winding receives the second pulse electrical signal in the first embodiment;

[0064] Fig.17 It is a schematic diagram of the state of the magnetic circuit part when the armature assembly moves to the first position in the first embodiment;

[0065] Fig.18 is a top view of the moving contact part in the first embodiment;

[0066] Fig.19 It is a front view of the pushing member in the first embodiment;

[0067] Fig. 20 It is a three-dimensional exploded view of some components of the moving contact part in the first embodiment;

[0068] Fig.21 It is a right side view of the limiting member in the first embodiment;

[0069] Fig. 22 for Fig.21 AA section view;

[0070] Fig.23 is a schematic diagram of the internal structure of the relay in the first embodiment when it is in the off state;

[0071] Fig.24 It is a schematic diagram of the internal structure of the relay in the first embodiment when it is in the on state;

[0072] Fig.25 It is a right side view of the relay in the first embodiment;

[0073] Fig.26 for Fig.25 BB section view;

[0074] Fig. 27 It is a top view of the magnetic circuit part in the second embodiment;

[0075] Fig.28 is a three-dimensional diagram of the armature assembly in the second embodiment;

[0076] Fig.29 is a three-dimensional exploded view of the armature assembly in the second embodiment;

[0077] Fig.30 It is a left side view of the armature assembly in the second embodiment;

[0078] Fig.31 It is a three-dimensional diagram of the relay in the second embodiment.

[0079] Description of main reference numerals:

[0080] 1. Relay; 2. Fixed part; 3. Magnetic circuit part; 4. Moving contact part; 5. Micro switch; 6. Accommodating part; 7. Static contact group; 8. Static magnet; 9. Barrier; 10. Shell; 11. Cover; 12. Accommodating cavity; 13. Slide; 14. First slot section; 15. Second slot section; 16. Static magnet slot; 17. Barrier slot; 18. Abutment surface; 19. Static contact; 20. Static contact point; 21. Connecting terminal; 22. First static contact; 23. Second static contact; 24. First flow part; 25. First static contact; 26. Second flow part; 27. Third flow part; 28. Fourth flow part; 29. ​​Fifth flow part; 30. Sixth flow part; 27a. Measuring terminal; 31. First connecting terminal; 32 , seventh flow portion; 33, second static contact; 34, eighth flow portion; 35, ninth flow portion; 36, second connection terminal; 37, coil assembly; 38, armature assembly; 39, shielding cover; 40, coil frame; 41, coil winding; 42, signal input terminal; 43, iron core; 44, yoke; 45, magnetic drive end; 46, first yoke; 47, second yoke; 48, first magnetic drive end; 49, second magnetic drive 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, parts intersecting each other; 60, suction portion; 61, first suction portion; 62, second The suction part; 63, the third suction part; 64, the fourth suction part; 65, the first shielding member; 66, the second shielding member; 67, the shielding wall; 68, the connecting wall; 69, the groove; 70, the pushing member; 71, the connecting member; 72, the moving contact member group; 73, the moving magnet group; 74, the elastic bracket group; 75, the elastic member; 76, the limit member; 77, the pushing body; 78, the second guide part; 79, the accommodating part; 80, the first insert part; 81, the second insert part; 82, the connecting column; 83, the moving spring; 84, the connecting end; 85, the moving contact member; 86, the overcurrent bridge; 87, the moving contact; 88, the first moving contact; 89, the second moving contact; 90, the moving magnet; 91, the magnetic body; 92, the extension part; 93, the elastic bracket; 94, Frame; 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 guiding part; 104, limiting part; 105, connecting part; 106, avoidance hole; 107, assembly hole; 108, bending part; 109, guiding part; 110, static contact terminal; 111, fixing part; 112, first fixing part; 113, second fixing part; 114, fixing part avoidance structure; 115, suction part avoidance structure; 116, first fixing part avoidance structure; 117, second fixing part avoidance structure; 118, third fixing part avoidance structure; 119, fourth fixing part avoidance structure;120, first suction part avoidance structure; 121, second suction part avoidance structure; 122, third suction part avoidance structure; 123, fourth suction part avoidance structure; F1, first magnetic force; M1, anti-short circuit magnetic circuit; M2, reverse flow magnetic field; S1, first surface; S2, second surface; W, interval; X1, closing direction; X2, opening direction. ; DETAILED DESCRIPTION

[0081] In the claims and the specification except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that a feature having one of the above directions is perpendicular to a feature 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" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction.

[0082] In the claims and the description, unless otherwise defined, the terms "first", "second" or "third", etc. are intended to distinguish different objects rather than to describe a specific order.

[0083] In the claims and the specification, unless otherwise defined, the terms "fixed connection", "fixed connection" or "relatively fixed" should be understood in a broad sense, that is, any connection method in which there is no displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0084] In the claims and the description, unless otherwise defined, the terms "includes", "has" and their variations mean "including but not limited to".

[0085] In the claims and the specification, unless otherwise defined, the term "provided with" means that the technical feature located thereafter is a part of the technical feature located therefor.

[0086] In the claims and the specification, unless otherwise defined, the term "group" means a collection, and unless otherwise defined, it may include one element or multiple elements. For example, a "moving contact group" may include one moving contact or more than two moving contacts.

[0087] In the claims and the specification, unless otherwise defined, the term "temporarily formed" means that the polarity of the magnetic driving end formed by the pulse electric signal disappears as the pulse electric signal disappears.

[0088] In the claims and the specification, unless otherwise specified, the term "reversal" means that when the current direction of the pulse electrical signal received by the coil winding this time is different from the current direction of the pulse electrical signal received last time, the polarity of the magnetic drive end temporarily formed this time is opposite to the polarity of the magnetic drive end temporarily formed last time. Of course, those skilled in the art should understand that for a magnetic latching relay, if the current direction of the pulse electrical signal received by the coil assembly this time is the same as the current direction of the pulse electrical signal received last time, the pulse electrical signal received this time has no control significance, and the state of the relay will not change.

[0089] In the claims and the specification, unless otherwise defined, the term "back side" refers to the side facing away from the stationary contact assembly.

[0090] In the claims and the specification, unless otherwise defined, the term "mounted" means connected directly or indirectly to each other.

[0091] Embodiment 1

[0092] Relay 1 is used to receive an electrical signal to control the on and off of an external circuit. Specifically, the relay 1 in this embodiment is a magnetic latching relay, which is used to receive a pulse electrical signal to control the on and off of an external circuit. In this embodiment, the pulse electrical signal can be divided into a first pulse electrical signal and a second pulse electrical signal. The first pulse electrical signal is correspondingly used to control the conduction of the external circuit, and the second pulse electrical signal is correspondingly used to control the off of the external circuit. After receiving the first pulse electrical signal, relay 1 switches from the off state to the on state. After the first pulse electrical signal disappears, relay 1 remains in the on state until the second pulse electrical signal is received; after receiving the second pulse electrical signal, relay 1 switches from the on state to the off state. After the second pulse electrical signal disappears, relay 1 remains in the off state until the first pulse electrical signal is received. In this embodiment, the external circuit is a single-phase AC circuit. Relay 1 needs to control the on and off of the single-phase AC circuit.

[0093] See also Figure 1 , Figure 1 Schematic diagram showing the structure of the relay 1 in this embodiment. Figure 1 As shown, the relay 1 includes a 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 electrical signal and drive the moving contact part 4 to move based on the pulse electrical signal. The moving contact part 4 is driven by the magnetic circuit part 3 to move relative to the fixed part 2 along the X-axis direction to control the on and off of the external circuit. The micro switch 5 is used to send a relay state signal to an external relay state sensing circuit.

[0094] like Figure 1 As shown, the fixed part 2 includes a receiving part 6 , a static contact member group 7 , a static conductive magnet 8 and a blocking member 9 .

[0095] like Figure 1 As shown, the accommodating component 6 is made of plastic and includes a shell 10 and a cover 11 .

[0096] See also Figure 2 , Figure 2 The housing 10 in this embodiment is shown. Figure 2 As shown, the housing 10 is provided with a cavity 12, which opens upward along the Z-axis direction and is used to accommodate the static contact group 7, the static conductive magnet 8, the barrier 9, the magnetic circuit part 3, the moving contact part 4 and the micro switch 5. The bottom wall of the housing 10 is provided with a slide groove 13 in the middle along the Y-axis direction, and the slide 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 this embodiment, the first groove section 14 and the second groove section 15 of the housing 10 are separated from each other along the X-axis direction. In other embodiments, the first groove section 14 and the second groove section 15 of the housing 10 can be arranged to be connected to each other along the X-axis direction. A static conductive magnet groove 16 is provided in front of the first groove section 14. The first groove section 14 is provided with barrier grooves 17 on the left and right sides along the Y-axis direction. Abutment surfaces 18 are provided at the rear of the two barrier grooves 17, and the abutment surfaces 18 are arranged forward.

[0097] See also Figure 3 , Figure 3 FIG. 1 shows the cover body 11 in this embodiment. Figure 3 As shown, the cover body 11 is fixedly connected to the shell 10 and is used to shield the cavity 12. The cover body 11 is also provided with a slide 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 body 11 is corresponding to the first groove section 14 of the shell 10 along the Z-axis direction. The second groove section 15 of the cover body 11 is corresponding to the second groove section 15 of the shell 10 along the Z-axis direction. In this embodiment, the first groove section 14 and the second groove section 15 of the cover body 11 are separated from each other along the X-axis direction. In other embodiments, the first groove section 14 and the second groove section 15 of the cover body 11 can be arranged to be connected to each other along the X-axis direction.

[0098] See also Figure 4 , Fig.23 and Fig.26 , Figure 4 , Fig.23 and Fig.26The static contact group 7 in this embodiment is shown. The static contact group 7 is used to electrically connect to an external circuit. The static contact group 7 includes two static contacts 19. Each static contact 19 is provided with a static contact 20 and a connecting terminal 21. The connecting terminal 21 is used to connect to an external circuit. One of the two connecting terminals 21 is used to connect a power source, and the other is used to connect a load. When the two static contacts 19 are turned on, the power source and the load are turned on; when the two static contacts 19 are turned off, the power source and the load are turned off. Specifically, in this 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 flow portion 24, a first static contact 25, a second flow portion 26, a third flow portion 27, a fourth flow portion 28, a fifth flow portion 29 and a sixth flow portion 30. The first flow portion 24 is perpendicular to the X-axis direction and extends along the Z-axis direction. The first flow portion 24 is provided with a first surface S1 facing backward along the X-axis direction. The first static contact 25 is the static contact 20 of the first static contact 22. There are two first static contacts 25, and the two first static contacts 25 are arranged along the Z-axis direction. The two first static contacts 25 extend backward from the first surface S1 of the first flow portion 24 along the X-axis direction. The second flow portion 26 extends forward from the right side of the first flow portion 24 along the Y-axis direction along the X-axis direction. The third flow portion 27 extends rightward from the front end of the second flow portion 26 along the X-axis direction along the Y-axis direction, as shown in FIG. Fig.23 As shown, the third flow portion 27 penetrates the accommodating member 6 to the right along the Y-axis direction. Figure 4 As shown, the lower part of the third current flow portion 27 along the Z-axis direction is provided with a measuring terminal 27a extending downward along the Z-axis direction, as shown in FIG. Fig.26 As shown, the measuring terminal 27a extends downwardly from the accommodation member 6 along the Z-axis direction. Figure 4 As shown, the fourth flow portion 28 extends backward along the X-axis direction from the right side of the third flow portion 27 along the Y-axis direction. The fifth flow portion 29 extends to the right along the Y-axis direction from the rear end of the fourth flow portion along the X-axis. The sixth flow portion 30 extends backward along the X-axis direction from the right side of the fifth flow portion 29 along the Y-axis direction and the lower part along the Z-axis direction. In this embodiment, the part of the third flow portion 27 extending out of the accommodating member 6, the fourth flow portion, the fifth flow portion and the sixth flow portion 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 flow portion 32, a second static contact 33, an eighth flow portion 34 and a ninth flow portion 35. The seventh flow portion 32 is provided with a first surface S1 ( Figure 4(not marked in the figure). The first surface S1 of the seventh flow portion 32 and the first surface S1 of the first flow portion 24 are located on the same plane perpendicular to the X-axis. The second static contact 33 is the static contact 20 of the second static contact 23. There are two second static contacts 33, and the two second static contacts 33 are arranged along the Z-axis direction. The two second static contacts 33 extend backward from the first surface S1 of the seventh flow portion 32 along the X-axis direction. The eighth flow portion 34 extends backward from the right side of the seventh flow portion 32 along the Y-axis direction along the X-axis direction. The ninth flow portion 35 extends to the right from the rear end of the eighth flow portion along the X-axis direction and the lower part along the Z-axis direction along the Y-axis direction. As shown Fig.23 As shown, the ninth current-passing portion 35 extends rightwardly from the accommodating member 6 along the Y-axis direction. In this embodiment, the ninth current-passing portion 35 constitutes a second connecting terminal 36. The second connecting terminal 36 is the connecting terminal 21 of the second static contact 23. The second connecting terminal 36 can be used to install a mutual inductor. In this embodiment, the two connecting terminals 21 are arranged along the X-axis direction and both extend out of the accommodating member 6 along the Y-axis direction.

[0099] See also Figure 5 and Figure 6 , Figure 5 and Figure 6 FIG. 8 shows the static conductive magnet 8 in this embodiment. Figure 5 As shown, the static conductive magnet 8 extends along the Z-axis direction. Figure 6 As shown, the surface of the static conductive magnet 8 facing forward along the X-axis direction forms a second surface S2. The second surface S2 is perpendicular to the X-axis direction.

[0100] See also Figure 1 , Figure 1 The barrier 9 in this embodiment is shown. In this embodiment, the number of the barrier 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 barrier 9 are perpendicular to the Y-axis direction. The barrier 9 is made of high temperature resistant insulating material. In this embodiment, ceramic material is used.

[0101] See also Figure 7 , Figure 7 FIG. 3 shows the magnetic circuit portion 3 in this embodiment. Figure 7 As shown, the magnetic circuit portion 3 includes a coil assembly 37 , an armature assembly 38 and a shielding cover 39 .

[0102] See also Figure 7 and Figure 8 , Figure 7 and Figure 8 The coil assembly 37 in this embodiment is shown. Figure 7 and Figure 8As shown, the coil assembly 37 includes a coil frame 40, a coil winding 41, a signal input terminal 42, an iron core 43 and a yoke 44. The coil frame 40 is fixedly connected to the housing 10. The coil frame 40 extends along the Y-axis direction and is provided with a center hole extending along the Y-axis direction. The coil frame 40 is provided with retaining walls at both ends along the Y-axis direction. The coil winding 41 is wound on the coil frame 40 and is located between the two retaining walls. The axis of the coil winding 41 extends along the Y-axis direction. The two terminals of the coil winding 41 are connected to three signal input terminals 42, and the signal input terminals 42 are used to receive pulse electrical signals. The iron core 43 is placed in the center hole of the coil frame 40 and extends along the Y-axis direction. The number of yokes 44 is two. The two yokes 44 are respectively fixedly connected to the two sides of the iron core 43 along the Y-axis direction, and the ends of the two yokes 44 away from the iron core 43 form magnetic drive ends 45 respectively. The two magnetic drive 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 respectively a first yoke 46 and a second yoke 47. The two magnetic drive ends 45 are respectively a first magnetic drive end 48 and a second magnetic drive end 49. The first magnetic drive end 48 is formed on the first yoke 46, and the second magnetic drive end 49 is formed on the second yoke 47. The coil winding 41 is excited by the pulse electrical signal to reverse the polarity temporarily formed by the two magnetic drive ends 45, so as to switch and attract different parts of the two armatures 51 in the X-axis direction and drive the armature assembly 38 to move along the X-axis direction. In this embodiment, for the convenience of introduction, it is assumed that when the signal input terminal 42 receives the first pulse electrical signal, the coil winding 41 generates a first magnetic field, and makes the first magnetic drive end 48 temporarily have an N-pole polarity, and makes the second magnetic drive end 49 temporarily have an S-pole polarity. After the first pulse electrical signal disappears, the first magnetic field of the coil winding 41 disappears, and the first magnetic drive end 48 and the second magnetic drive end 49 no longer have the polarity generated based on the first magnetic field; when the signal input terminal 42 receives a second pulse electrical signal whose current direction is opposite to that of the first pulse electrical signal, the coil winding 41 generates a second magnetic field, which reverses the polarity of the first magnetic drive end 48 and has an S-pole polarity, and reverses the polarity of the second magnetic drive end 49 and has an N-pole polarity. After the second pulse electrical signal disappears, the second magnetic field of the coil winding 41 disappears, and the first magnetic drive end 48 and the second magnetic drive end 49 no longer have the polarity generated based on the second magnetic field. "Temporarily formed" in this embodiment means that the polarity of the magnetic drive end 45 formed by the pulse electrical signal disappears with the disappearance of the pulse electrical signal. "Reversal" in this embodiment means that when the current direction of the pulse electrical signal received by the coil winding 41 this time is different from that of the pulse electrical signal received last time, the polarity of the magnetic drive end 45 temporarily formed this time is opposite to the polarity of the magnetic drive end 45 temporarily formed last time.

[0103] See also Fig. 9 and Fig.10 , Fig. 9 and Fig.10The armature assembly 38 in this embodiment is shown. The armature assembly 38 is driven by the coil assembly 37 to move between the first position and the second position along the X-axis direction. When the armature assembly 38 moves to the first position, the relay 1 is in the off state and the external circuit is turned off. When the armature assembly 38 moves to the second position, the relay 1 is in the on state and the external circuit is turned on. The first position is further back than the second position along the X-axis direction. Fig. 9 and Fig.10 As shown, in this 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. In other embodiments, the two permanent magnets 50 can also be made of other permanent magnetic materials, such as neodymium iron boron permanent magnets. In this 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 the N pole and the polarity of the second magnetic pole 56 is the S pole. In this embodiment, the two magnetic poles 54 of each permanent magnet 50 are arranged along the X-axis direction. In this embodiment, the two permanent magnets 50 are arranged along the Y-axis direction. Among them, the first permanent magnet 52 is on the left along the Y-axis direction, and the second permanent magnet 53 is on the right 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 the back along the X-axis direction. The first magnetic pole 55 of the second permanent magnet 53 is in the back along the X-axis direction, and the second magnetic pole 56 is in the 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 the first projection plane perpendicular to the Z-axis direction intersect with each other. The parts 59 where the two armatures 51 intersect with each other form a gap W along the Z-axis direction. Each armature 51 is provided with two suction parts 60 on both sides along the Y-axis direction. Among them, the first armature 57 is provided with a first suction part 61 and a second suction part 62 on both sides along the Y-axis direction, the first suction part 61 is on the left side along the Y-axis direction and in front along the X-axis direction; the second suction part 62 is on the right side along the Y-axis direction and in the back along the X-axis direction. The second armature 58 is provided with a third suction portion 63 and a fourth suction portion 64 on both sides along the Y-axis direction, respectively. The third suction portion 63 is on the right side along the Y-axis direction and in front along the X-axis direction; the fourth suction portion 64 is on the left side along the Y-axis direction and in the back along the X-axis direction. Therefore, in this embodiment, the first suction portion 61 and the third suction portion 63 are arranged along the Y-axis direction, the fourth suction portion 64 and the second suction portion 62 are arranged along the Y-axis direction, the first suction portion 61 and the fourth suction portion 64 are arranged along the X-axis direction, and the third suction portion 63 and the second suction portion 62 are arranged along the X-axis direction. In this embodiment, the projection of the armature assembly 38 on the first projection plane is mirror-symmetrical relative to the symmetry plane perpendicular to the Y-axis direction.

[0104] See also Figure 7 and Fig.11 , Figure 7 and Fig.11 FIG. 3 shows a shielding cover 39 in this embodiment. Fig.11 As shown, the shielding cover 39 includes a first shielding member 65 and a second shielding member 66. The first shielding member 65 and the second shielding member 66 are plugged together to form the shielding cover 39. The shielding cover 39 is provided with two shielding walls 67 and a connecting wall 68. Each shielding wall 67 is provided with a groove 69 at the front end along the X-axis direction. The groove 69 extends along the X-axis direction and is located in the middle of the shielding wall 67 along the Y-axis direction. Figure 7 As shown, the two shielding walls 67 are arranged perpendicular 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 perpendicular 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.

[0105] See also Figures 12 to 17 , Figures 12 to 17 The operating principle of the magnetic circuit portion 3 in this embodiment is shown.

[0106] like Fig.12 As shown, in this embodiment, the armature assembly 38 is located between the arms of the two yokes 44 extending along the X axis along the Y axis. The first magnetic drive end 48 is located between the first suction part 61 and the fourth suction part 64 along the X axis; the second magnetic drive end 49 is located between the third suction part 63 and the second suction part 62 along the X axis.

[0107] Fig.12 FIG. 2 shows the state of the magnetic circuit portion 3 when the armature assembly 38 in this embodiment is in the magnetic holding state at the first position. Fig.12As shown, when the armature assembly 38 is in the magnetic holding state at the first position, the first suction portion 61 suctions the first magnetic drive end 48, and the third suction portion 63 suctions the second magnetic drive end 49. At this time, the magnetic circuit portion 3 forms two closed magnetic circuits, namely the first closed magnetic circuit and the second closed magnetic circuit. The first closed magnetic circuit runs from the first magnetic pole 55 of the first permanent magnet 52, through the first suction portion 61, the first magnetic drive end 48, the first yoke 46, the iron core 43, the second yoke 47, the second magnetic drive end 49, the third suction portion 63, the part 59 that the second armature 58 crosses each other, and 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 passes through the entire coil assembly 37. The second closed magnetic circuit runs from the first magnetic pole 55 of the second permanent magnet 53, through the intersecting portion 59 of the first armature 57, the first suction portion 61, the first magnetic drive end 48, the first yoke 46, the iron core 43, the second yoke 47, the second magnetic drive end 49, the third suction portion 63, the second magnetic pole 56 of the second permanent magnet 53, and back to the first magnetic pole 55 of the second permanent magnet 53, without any air gap in between, and passes 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 closed magnetic circuit and the second closed magnetic circuit, and the superposition effect between the two, a greater magnetic attraction force is generated between the first suction portion 61 and the first magnetic drive end 48 and between the third suction portion 63 and the second magnetic drive end 49, and the armature assembly 38 is maintained at the first position relative to the coil assembly 37.

[0108] Fig.13 FIG. 3 shows the state of the magnetic circuit portion 3 when the coil assembly 37 in this embodiment just receives the first pulse electrical signal. Fig.13As shown, at this time, the coil winding 41 is excited by the first pulse electrical signal to generate a first magnetic field, so that the first magnetic drive end 48 temporarily has an N-pole polarity, and the second magnetic drive end 49 temporarily has an S-pole polarity. Since the first magnetic drive end 48 and the first suction part 61 have the same polarity, both are N-pole, the first magnetic drive end 48 generates a magnetic repulsion force on the first suction part 61; since the second magnetic drive end 49 and the third suction part 63 have the same polarity, both are S-pole, the second magnetic drive end 49 generates a magnetic repulsion force on the third suction part 63. In addition, the magnetic circuit part 3 also forms two push magnetic circuits at this time, namely the first push magnetic circuit and the second push magnetic circuit. The first push magnetic circuit returns from the first magnetic drive end 48 through the travel air gap, the fourth suction 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 cross-section 59 of the first armature 57, the second suction part 62, the travel air gap, the second magnetic drive end 49, the second yoke 47, the core 43, the first yoke 46, and then returns to the first magnetic drive end 48, with only two travel air gaps in between, and passes through the entire coil assembly 37. The second push magnetic circuit returns from the first magnetic drive end 48 through the travel air gap, the fourth suction part 64, the cross-section 59 of the second armature 58, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second suction part 62, the travel air gap, the second magnetic drive end 49, the second yoke 47, the core 43, the first yoke 46, and then returns to the first magnetic drive end 48, with only two travel air gaps in between, and passes through the entire coil assembly 37. Therefore, when the coil assembly 37 just receives the first pulse electrical signal, not only does the first magnetic drive end 48 exert a magnetic repulsion force on the first suction part 61, and the second magnetic drive end 49 exerts a magnetic repulsion force on the third suction part 63, but also due to the existence of the first pushing magnetic circuit and the second pushing magnetic circuit, and the superposition effect between the two, the first magnetic drive end 48 generates a magnetic attraction force on the fourth suction part 64, and the second magnetic drive end 49 generates a magnetic attraction force on the second suction part 62, so that the coil assembly 37 can form a stronger driving force on the armature assembly 38, pushing the armature assembly 38 to move from the first position along the closing direction X1 to the second position.

[0109] Fig.14 FIG. 2 shows the state of the magnetic circuit portion 3 when the armature assembly 38 is driven by the coil assembly 37 to move to the second position along the closing direction X1 in this embodiment. Fig.14As shown, when the armature assembly 38 just moves to the second position, the first pulse electric signal and the first magnetic field have not disappeared, the first magnetic drive end 48 still temporarily has the N-pole polarity, and the second magnetic drive end 49 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 forms two closed magnetic loops, namely the third closed magnetic loop and the fourth closed magnetic loop. The third closed magnetic loop starts from the first magnetic drive end 48, passes through the fourth suction 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 part 59 where the first armature 57 intersects with each other, the second suction part 62, the second magnetic drive end 49, the second yoke 47, the iron core 43, the first yoke 46 and returns to the first magnetic drive end 48, without any air gap in between, and passes through the entire coil assembly 37. The fourth closed magnetic circuit goes from the first magnetic drive end 48, through the fourth suction part 64, the cross-section 59 of the second armature 58, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second suction part 62, the second magnetic drive end 49, the second yoke 47, the iron core 43, the first yoke 46, and returns to the first magnetic drive end 48 without any air gap in between, 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 is generated between the first magnetic drive end 48 and the fourth suction part 64 and between the second magnetic drive end 49 and the second suction part 62.

[0110] Fig.15 FIG. 2 shows the state of the magnetic circuit portion 3 when the armature assembly 38 in this embodiment is in the magnetic holding state at the second position. Fig.15 As shown in FIG. 1 , when the first pulse electrical signal disappears, the first magnetic field disappears, and the first magnetic drive end 48 and the second magnetic drive 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 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 Fig.14 The path of the third closed magnetic circuit shown in FIG. 1 is the same as that of the third closed magnetic circuit shown in FIG. 1 ; 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 third closed magnetic circuit shown in FIG. Fig.14 The path of the fourth closed magnetic circuit shown is the same. The third closed magnetic circuit and the fourth closed magnetic circuit are superimposed on each other, so that a greater magnetic attraction force is generated between the fourth suction portion 64 and the first magnetic drive end 48 and between the second suction portion 62 and the second magnetic drive end 49, and the armature assembly 38 is maintained in the second position relative to the coil assembly 37.

[0111] Fig.16 FIG. 3 shows the state of the magnetic circuit portion 3 when the coil assembly 37 in this embodiment just receives the second pulse electrical signal. Fig.16As shown, at this time, the coil winding 41 is excited by the second pulse electrical signal to generate a second magnetic field, so that the first magnetic drive end 48 temporarily has an S-pole polarity, and the second magnetic drive end 49 temporarily has an N-pole polarity. Since the first magnetic drive end 48 and the fourth suction part 64 have the same polarity, both are S-pole, the first magnetic drive end 48 generates a magnetic repulsion force on the fourth suction part 64; since the second magnetic drive end 49 and the second suction part 62 have the same polarity, both are N-pole, the second magnetic drive end 49 generates a magnetic repulsion force on the second suction part 62. In addition, the magnetic circuit part 3 also forms two push magnetic circuits at this time, namely the third push magnetic circuit and the fourth push magnetic circuit. The third push magnetic circuit returns to the second magnetic drive end 49 from the second magnetic drive end 49 through the travel air gap, the third suction part 63, the part 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 suction part 61, the travel air gap, the first magnetic drive end 48, the first yoke 46, the iron core 43, the second yoke 47, and there are only two travel air gaps in the middle, and it passes through the entire coil assembly 37. The fourth push magnetic circuit returns to the second magnetic drive end 49 from the second magnetic drive end 49 through the travel air gap, the third suction 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 part 59 where the first armature 57 intersects with each other, the first suction part 61, the travel air gap, the first magnetic drive end 48, the first yoke 46, the iron core 43, the second yoke 47, and there are only two travel air gaps in the middle, and it passes through the entire coil assembly 37. Therefore, when the coil assembly 37 just receives the second pulse electrical signal, not only does the first magnetic drive end 48 exert a magnetic repulsion force on the fourth suction part 64, and the second magnetic drive end 49 exerts a magnetic repulsion force on the second suction part 62, but also due to the existence of the third pushing magnetic circuit and the fourth pushing circuit, and the existence of a superposition effect between the two, the first magnetic drive end 48 generates a magnetic attraction force on the first suction part 61, and the second magnetic drive end 49 generates a magnetic attraction force on the third suction part 63, so that the coil assembly 37 can form a stronger driving force on the armature assembly 38, pushing the armature assembly 38 to move from the second position along the disconnection direction X2 to the first position.

[0112] Fig.17 FIG. 2 shows the state of the magnetic circuit portion 3 when the armature assembly 38 is driven by the coil assembly 37 to move to the first position along the disconnection direction X2 in this embodiment. Fig.17 As shown, when the armature assembly 38 just moves to the first position, the second pulse electric signal and the second magnetic field have not disappeared, the first magnetic drive end 48 still has the S pole polarity temporarily, and the second magnetic drive end 49 still has the S pole polarity temporarily. At this time, the magnetic circuit part 3 still exists Fig.12 The first closed magnetic circuit and the second closed magnetic circuit are shown, wherein the first closed magnetic circuit can be regarded as starting from the second magnetic drive end 49, and its path is Fig.12The path of the first closed magnetic circuit shown is the same; the second closed magnetic circuit can be regarded as starting from the second magnetic drive end 49, and its path is the same as 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 the two, a greater magnetic attraction force is generated between the first magnetic drive end 48 and the first suction part 61 and between the second magnetic drive end 49 and the third suction part 63.

[0113] When the second pulse electrical signal disappears, the second magnetic field disappears, and the first magnetic drive end 48 and the second magnetic drive end 49 no longer have the polarity generated by the second magnetic field. Fig.12 It is shown in the magnetic holding state in the first position.

[0114] See also Fig.18 , Fig.18 FIG. 4 shows the moving contact part 4 in this embodiment. Fig.18 As shown, the moving contact part 4 includes a pushing member 70 , a connecting member 71 , a moving contact member group 72 , a moving magnet group 73 , an elastic bracket group 74 , an elastic member 75 and a limiting member 76 .

[0115] See also Fig.19 , Fig.19 FIG. 7 shows a pusher 70 and a connector 71 in this embodiment. Fig.19 As shown, in this embodiment, the armature assembly 38, the connecting member 71 and the movable spring 83 are fixedly connected to the push member 70. Specifically, the armature assembly 38, the connecting member 71 and the movable spring 83 are integrally formed with the push member 70 by insert injection molding. The push member 70 is made of plastic. The push member 70 is provided with a push body 77 and two second guide parts 78. The push body 77 is provided with a receiving part 79, a first insert part 80 and a second insert part 81. The receiving part 79 is used to receive the armature assembly 38. The first insert part 80 is used to receive the connecting member 71 and is located in front of the receiving part 77 along the X-axis direction. Two connecting columns 82 are provided on the front surface of the first insert part 78. 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 part 80 along the X-axis direction. The second insert part 81 is used to receive the movable spring 83 and is located behind the receiving part 79 along the X-axis direction. The movable spring 83 is a part of the micro switch 5, which will be described in detail later. The two second guide portions 78 extend away from each other along the Z-axis direction from the pushing body 77. In this 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 accommodating portion 79 along the Z-axis direction, respectively, and the second guide portions 78 are arranged in the middle of the accommodating portion 79 along the Y-axis direction and the middle of the X-axis direction. The projection of each second guide portion 78 on the first projection plane perpendicular to the Z-axis direction is circular.

[0116] like Fig.19 As shown, the connecting member 71 extends along the Z-axis direction, and its two ends along the Z-axis direction extend out of the first insert portion 80 to form two connecting ends 84 .

[0117] See also Fig. 20 , Fig. 20 The moving contact group 72, the moving magnet group 73, the elastic bracket group 74 and the elastic member 75 in this embodiment are shown. The moving contact group 72 is driven by the armature assembly 38 and the pusher 70 which is molded integrally with the armature assembly 38 by insert injection molding to close or open with the stationary contact group 7 along the X-axis direction, so as to correspondingly conduct or cut off the electrical connection between the two stationary contacts 19. Fig. 20 As shown, the moving contact group 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 a current bridge 86 and two moving contacts 87. The current bridge 86 extends along the Y-axis direction. The two moving contacts 87 are arranged along the Y-axis direction and fixed to the current bridge 86, and each moving contact 87 faces forward along the X-axis direction and is arranged opposite to the corresponding static contact 20. Specifically, the moving contact 87 opposite to the first static contact 25 along the X-axis direction is the first moving contact 88; the moving contact 87 opposite to the second static contact 33 along the X-axis direction is the second moving contact 89. When the moving contact group 72 is closed with the static contact group 7, each first moving contact 88 abuts against the corresponding first static contact 25 along the X-axis direction, and each second moving contact 89 abuts against the corresponding second static contact 33 along the X-axis direction, and the first static contact 22 and the second static contact 23 are connected through the two moving contacts 85. When the moving contact group 72 is disconnected from the stationary contact group 7, each first moving contact 88 moves away from the corresponding first stationary contact 25 along the X-axis direction, and each second moving contact 89 moves 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.

[0118] The moving magnet group 73 is fixed relative to the moving contact group 72 and is arranged relative to the static magnet 8 along the X-axis direction. Fig. 20 As shown, the moving magnet group 73 includes a moving magnet 90, and the moving magnet 90 is arranged corresponding to the moving contact 85. In this embodiment, the number of the moving magnets 90 is two, and the two moving magnets 90 are arranged along the Z-axis direction. Each moving magnet 90 is provided with a magnetic body 91 and two extensions 92. The magnetic body 91 extends along the Z-axis direction and is fixed to the back of the current bridge 86, where the "back" refers to the surface away from the static contact group 7. The extension 92 extends forward along the X-axis direction from both ends of the magnetic body 91 along the Z-axis direction.

[0119] The elastic support assembly 74 is mounted on the push member 70 and is located between the push member 70 and the movable contact assembly 72 along the X-axis direction. Fig. 20As shown, it includes an elastic bracket 93. In this embodiment, the number of elastic brackets 93 is two and they are arranged along the Z-axis direction. The elastic bracket 93 is provided with a frame 94 and a first elastic portion 95. The frame 94 is fixed relative to the pusher 70. Specifically, the frame 94 is provided with two first connecting holes 96 corresponding to the connecting column 82. The connecting column 82 passes through the first connecting holes 96 so that the frame 94 is positioned relative to the pusher 70 in any direction perpendicular to the X-axis direction. The first elastic portion 95 is suitable for elastic deformation along the X-axis direction. The first elastic portion 95 is arranged corresponding to the moving contact 85, and the moving contact 85 is fixed to the corresponding first elastic portion 95. In this embodiment, each first elastic portion 95 includes two first elastic arms 97, one end of the first elastic arm 97 is connected to the frame 94 as a whole, and the other end is fixed to the overcurrent bridge 86. The position where the first elastic arm 97 is fixed to the overcurrent bridge 86 is located on the back of the corresponding moving contact 87.

[0120] The elastic member 75 is adapted to abut against the accommodating member 6. The elastic member 75 deforms to store energy when the push member 70 moves along the opening direction X2, and recovers to release energy when the push member 70 moves along the closing direction X1. Fig. 20 As shown, the elastic member 75 is provided with a main body 98 and a second elastic portion 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 column 82, and the connecting column 82 passes through the second connecting holes 100 so that the main body 98 can be positioned relative to the pushing member 70 along any direction perpendicular to the X-axis direction. The main body 98 is located between the frame 94 and the first insert portion 78 along the X-axis direction. The second elastic portion 99 is suitable for elastic deformation along the X-axis direction. The second elastic portion 99 is arranged corresponding to the moving contact 85 in the moving contact member group 72. The second elastic portion 99 includes two second elastic arms 101, one end of the two second elastic arms 101 is respectively connected to the main body 98 as a whole, and the other end extends to both sides of the Y-axis direction and is suitable for abutting the corresponding abutting surface 18.

[0121] See also Fig.21 and Fig. 22 , Fig.21 and Fig. 22 The limiting member 76 in this embodiment is shown. The limiting member 76 is fixed relative to the pushing member 70, and when the moving contact member group 72 is disconnected from the stationary contact member group 7, it abuts against the moving contact member group 72 backwards to limit the distance between the moving contact member group 72 and the stationary contact member group 7. Fig.21 and Fig. 22As shown, the limiting member 76 is provided with a limiting body 102 and two first guide portions 103. The limiting body 102 is made of metal. The limiting body 102 is provided with a limiting portion 104 and two connecting portions 105. The limiting portion 104 is suitable for abutting against each moving contact 85 in the moving contact group 72. The limiting portion 104 extends along the Z-axis direction and is provided with three avoidance holes 106, and the avoidance holes 106 are used for allowing the extension portion 92 of each moving magnet 90 to extend forward along the X-axis direction. The two connecting portions 105 extend backward from both ends of the limiting portion 104 along the Z-axis direction respectively, and the connecting portion 105 is provided with an assembly hole 107 that cooperates with and is fixed to the connecting end 84 and a bending portion 108 for installing the first guide portion 103. The bending portion 108 extends from the front end of the connecting portion 105 along the closing direction X1 along the Z-axis direction. The extension directions of the bending portions 108 of the two connecting portions 105 are opposite to each other. The two first guide portions 103 are arranged along the Z-axis direction and are located away from each other at the ends of the two bending portions 108 along the Z-axis direction. The material of the first guide portion 103 is plastic. The two first guide portions 103 are integrally formed with the limiting body 102 by insert injection molding, and the first guide portion 103 wraps the corresponding bending portion 108. In this embodiment, the first guide portion 103 is located at the front end of the limiting member 76 along the closing direction X1 along the X-axis direction, and is located in the middle of the limiting member 76 along the Y-axis direction. In this embodiment, the first guide portion 103 and the second guide portion 78 are both guide portions 109. The guide portion 109 is used to guide the movement of the moving contact portion 4 along the X-axis direction.

[0122] See also Figure 1 , Figure 1 FIG. 5 shows a micro switch 5 in this embodiment. Figure 1 As shown, in this embodiment, the micro switch 5 includes a dynamic spring 83 and two static contact terminals 110. The static contact terminal 110 extends along the Z-axis direction and extends out of the accommodating member 6. The two static contact terminals 110 are arranged along the Y-axis direction and are located between the dynamic spring 83 and the coil winding 41 along the X-axis direction. The two static contact terminals 110 are used to be electrically connected to the relay state sensing circuit. The dynamic spring 83 is fixedly connected to the push member 70. In this embodiment, the dynamic spring 83 and the push member 70 are insert-molded as a whole and are located in the second insert part 81. The dynamic spring 83 is provided with two abutment arms extending away from each other along the Y-axis direction. The dynamic spring 83 is driven by the push member 70 to move along the X-axis direction so that the abutment arms abut or move away from the two static contact terminals 110. In other embodiments, when the dynamic spring 83 is not fixedly connected to the push member 70, the dynamic spring 83 can also move away from the two static contact terminals based on its own elastic restoring force.

[0123] See also Fig.23 and Fig.26 , Fig.23 and Fig.26 The internal structure of the relay 1 in this embodiment is shown.

[0124] like Fig.23As shown, in this embodiment, the magnetic circuit part 3 and the moving contact part 4 are installed in the cavity 12. The two static contacts 19 of the static contact group 7 are fixed to the accommodating part 6, so that the static contacts 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 extend out of the accommodating part 6 along the Y-axis direction. The second connecting terminal 35 of the second static contact 23 is located between each static contact 20 and the coil winding 41 along the X-axis direction. The eighth current-passing portion 34 is located on the outside of the moving contact group 72 along the Y-axis direction, and is also located on the outside of the barrier 9 on the right side. The static conductive magnet 8 is inserted into the static conductive magnet slot 16 and fixed to the accommodating part 6. The first static contact 25 and the second static contact 33 are respectively located on both sides of the static conductive magnet 8 along the Y-axis direction. The projections of the parts of all the static contacts 20 suitable for contacting the moving contact group 72 on the second projection plane perpendicular to the Y-axis direction are all located within the projection of the static magnet 8 on the second projection plane, and the surface of the static magnet 8 facing the moving magnet group 73 is closer to the moving magnet group 73 than all the static contacts 20 along the X-axis direction. The second surface S2 is closer to the moving magnet group 73 than the first surface S1. The static magnet 8 and the moving magnet group 73 are arranged opposite to each other along the X-axis direction. The static magnet 8 is located between the third flow-through portion 27 and the moving magnet group 73 along the X-axis direction. In other embodiments, the static magnet 8 can also be fixed relative to the limit member 76, which can play the same role. The two blocking members 9 are respectively inserted into the corresponding blocking member grooves 17 and fixed to the accommodating member 6, so that the two blocking members 9 are located outside the static contact group 7 along the Y-axis direction. The first magnetic drive end 48 is located between the first suction portion 61 and the fourth suction portion 64 along the X-axis direction. The second magnetic drive end 49 is located between the third suction portion 63 and the second suction portion 62 along the X-axis direction. Each first moving contact 88 is arranged opposite to the corresponding first static contact 25 along the X-axis direction, and each second moving contact 89 is arranged opposite to the corresponding second static contact 33 along the X-axis direction. The limiter 76 is fixedly connected to the connecting member 71 to be relatively fixed to the pushing member 70. The limiter 76 is suitable for abutting the moving contact group 72 along the disconnection direction X2. The elastic member 75 is suitable for abutting the accommodating member 6. The first guide portion 103 and the second guide portion 78 are both centered between the first moving contact 88 and the second moving contact 89 along the Y-axis direction.

[0125] like Fig.26As shown, the shell 10 and the cover body 11 are fixedly connected to form the accommodating member 6. The shielding cover 39 is placed in the accommodating member 6. The first guide portion 103 located at the upper part along the Z-axis direction extends into the first groove section 14 of the slide groove 13 of the cover body 11 along the Z-axis direction. The second guide portion 78 located at the upper part along the Z-axis direction extends into the second groove section 15 of the slide groove 13 of the cover body 11 along the Z-axis direction. The first guide portion 103 located at the lower part along the Z-axis direction extends into the first groove section 14 of the slide groove 13 of the shell 10 along the Z-axis direction. The second guide portion 78 located at the lower part along the Z-axis direction extends into the second groove section 15 of the slide groove 13 of the shell 10 along the Z-axis direction. As a result, each guide portion 109 extends into the corresponding slide groove 13 along the Z-axis direction, and slides with the slide groove 13 along the X-axis direction. In this embodiment, the guide portion 109 is arranged on the moving contact portion 4, and the slide groove 13 is arranged on the accommodating member 13. In other embodiments, the guide portion 109 may be disposed on the accommodating member 6 , and the slide groove 13 may be disposed on the movable contact portion 4 .

[0126] See also Fig.23 , Fig.23 2 shows the state of the relay 1 when the armature assembly 38 is in the first position. Fig.23 As shown, when the armature assembly 38 is in the first position, the moving contact group 72 is disconnected from the static contact group 7 along the disconnection direction X2, the relay 1 is in the off state, and the external circuit is turned off. At this time, the elastic member 75 abuts against the abutting surface 18 along the disconnection direction X2, causing the elastic member 75 to deform and store energy. The limit member 76 abuts against the moving contact group 72 along the disconnection direction X2, and each moving contact 85 presses against the elastic bracket group 74, and fixes the frame 94 of the elastic bracket 93 and the main body 98 of the elastic member 75 relative to the push member 70 along the X-axis direction, so that the frame 94 and the elastic member 75 are fixed relative to the push member 70. The moving spring 83 abuts against the two static contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the off state.

[0127] When the coil winding 41 receives the first pulse electrical signal, the coil assembly 37 drives the armature assembly 38 to move along the closing direction X1, and the armature assembly 38 drives the moving contact part 4 to move along the closing direction X1. During this process, the guide part 109 slides in the sliding groove 13 along the closing direction X1 and guides the moving contact part 4. The elastic member 75 restores the deformation to release energy. When the moving contact 87 contacts the corresponding static contact 20, the pusher 70 enters the overtravel. At this time, the elastic bracket group 74 deforms to store energy until the armature assembly 38 reaches the second position, and the moving contact group 72 is closed with the static contact group 7.

[0128] See also Fig.24 and Fig.26 , Fig.24 and Fig.26 2 shows the state of the relay 1 when the armature assembly 38 is in the second position. Fig.24As shown, when the armature assembly 38 is in the second position, the moving contact group 72 and the static contact group 7 are closed along the closing direction X1, the relay 1 is in the on state, and the external circuit is turned on. The third current-carrying portion 27 of the first static contact 22 forms a reverse flow portion, and the current-carrying direction of the reverse flow portion is opposite to the current-carrying direction of the overcurrent bridge 86. The eighth current-carrying portion 34 of the second static contact 23 forms a cross-flow portion, and the current-carrying direction of the cross-flow portion is the disconnection direction X2 when the current-carrying direction of the overcurrent bridge 86 is to the right along the Y-axis direction and the cross-flow portion is located on the right side of the overcurrent bridge 86. The magnetic field formed by the current passing through the cross-flow portion acts on the overcurrent bridge 86 through which the current passes, so that the overcurrent bridge 86 is subjected to the first magnetic force F1 toward the static contact group 7. The elastic bracket group 74 deforms and stores energy along the X-axis direction. The elastic member 75 moves away from the abutment surface 18 along the X-axis direction. The moving spring 83 moves away from the two static contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the on state. As shown Fig.26 As shown, the current passing through the overcurrent bridge 86 forms an anti-short circuit magnetic circuit M1 between the dynamic magnet 90 and the static magnet 8. In this embodiment, the number of the anti-short circuit magnetic circuits M1 is two. At the same time, the reverse flow magnetic field M2 formed by the current passing through the reverse flow portion formed by the third overcurrent portion 27 forms the same direction of magnetic flux lines formed on one side of the static magnet 8 as the magnetic flux lines formed on one side of the static magnet 8 by the anti-short circuit magnetic circuit M1.

[0129] When the coil winding 41 receives the second pulse electrical signal, the coil assembly 37 drives the armature assembly 38 to move along the disconnection direction X2, and the armature assembly 38 drives the movable contact part 4 to move along the disconnection direction X2. During this process, the guide part 109 slides in the slide groove 13 along the disconnection direction X2 and guides the movable contact part 4. The elastic bracket group 74 recovers the deformation and releases energy. The elastic member 75 deforms and stores energy after contacting the contact surface 18. Until it returns to Fig.23 The armature assembly 38 is shown in a first position.

[0130] The electric meter (not shown) in this embodiment uses the above-mentioned relay 1.

[0131] In this embodiment, the static contacts 20 of the two static contacts 19 are arranged along the Y-axis direction, and the moving contact group 72 is closed or disconnected with the static contact group 7 along the X-axis direction to correspondingly conduct or disconnect the electrical connection between the two static contacts 19. Under this structure, the safety distance between the moving contact group 72 and the static contact group 7 is twice the actual distance between the moving contact 87 and the corresponding static 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 moving contact group 72 and the static contact group 7.

[0132] In this embodiment, the static contacts 20 of the two static contacts 19 are arranged along the Y-axis direction, and the connection terminals 21 of the two static contacts 19 are arranged along the X-axis direction and extend out of the accommodating member 6 along the Y-axis direction. Compared with the static contacts 19 extending out of the accommodating member 6 along the moving direction of the moving contact 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 along the X-axis direction and the size along the Y-axis direction achieve a good balance, which can create more favorable conditions for increasing the safe distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0133] In this embodiment, on the basis of retaining the coil assembly of the swing-type magnetic latching relay, the two armatures 51 fixed to the permanent magnet 50 in the armature assembly 38 are improved from being arranged in parallel to being crossed with each other, so that the armature assembly 38 can be converted from swinging 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, and more favorable conditions can be created for increasing the safe distance between the moving contact assembly 72 and the static contact assembly 7 in a limited space.

[0134] In the present embodiment, since the axis of the coil winding 41 extends along the Y-axis direction and the two magnetic drive ends 45 are arranged along the Y-axis direction, and the linear movement direction of the armature assembly 38 is the X-axis direction perpendicular to the Y-axis direction, such a layout is conducive to making room for the movement of the armature assembly 38 and the moving contact group 72 along the X-axis. Moreover, 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. Therefore, the relay 1 will not require a very long length in one direction (whether in the X-axis direction or the Y-axis direction), which can make it easier for the relay 1 to adapt to limited space and 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.

[0135] In this embodiment, there is no need to insert a push rod and a moving iron core in the coil winding 41, so 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 magnetic holding 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 driving force on the armature assembly 38 is greater, which 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.

[0136] In this embodiment, the two suction parts 60 of the armature assembly 38 can form a first part of a magnetic circuit without any air gap through the permanent magnet 50 and the two armatures 51, and the two magnetic drive ends 45 of the coil assembly 37 can also form a second part of a magnetic circuit that runs through the entire coil assembly 37. In the magnetic holding state, the suction part 60 attracts the corresponding magnetic drive end 45 along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without an air gap, so the magnetic loss is small and the magnetic efficiency is higher. Without increasing the power consumption of the coil assembly 37, it is beneficial to increase the movement stroke of the moving contact group 72; and when the magnetic driving force is equivalent, it can reduce the power consumption required for the coil assembly 37 to achieve magnetic drive, which is beneficial to make the size of the coil assembly 37 smaller. Therefore, it can create more favorable conditions for increasing the safe distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0137] In the present embodiment, since the second part of the magnetic circuit passes through the entire coil assembly 37, the magnetic force during magnetic holding is greater than that of the direct-acting magnetic holding relay in the prior art. In particular, when the relay 1 is impacted by a large fault current, the armature assembly 38 is less likely to break away from the magnetic holding state and move, which helps to prevent the moving contact group 72 from breaking away from the static contact group 7 due to the large fault current, resulting in destructive arcing.

[0138] In this embodiment, when the armature assembly 38 is in the magnetic holding state at the first position, when the coil assembly 37 is excited by the pulse electric signal to reverse the polarity temporarily formed by the two magnetic drive ends 45, not only the two magnetic drive ends 45 generate magnetic repulsion on the first suction part 61 and the third suction part 63, but also the first part of the push magnetic circuit without air gap is formed between the fourth suction part 64 and the second suction part 62 through the armature assembly 38, and the two magnetic drive ends 45 form the second part of the push magnetic circuit running through the entire coil assembly 37 through the coil assembly 37, and the first part and the second part of the push magnetic circuit constitute a complete push magnetic circuit, in which there is only the necessary stroke air gap, and no other air gap, so the magnetic efficiency is higher, and the magnetic drive force of the two magnetic drive 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 moving contact member group 72 and the static contact member group 7. Similarly, when the armature assembly 38 is in the magnetic holding state at the second position, when the coil assembly 37 is excited by the pulse electric signal to reverse the polarity temporarily formed by the two magnetic drive ends 45, the same technical effect is also achieved.

[0139] In the present embodiment, since the first suction part 61 and the fourth suction part 64 are arranged along the X-axis direction, the third suction part 63 and the second suction part 62 are arranged along the X-axis direction, the first suction part 61 and the third suction part 63 are arranged along the Y-axis direction, and the fourth suction part 64 and the second suction part 62 are arranged along the Y-axis direction, the four suction parts 60 of the armature assembly 38 are respectively located at the four vertices of the rectangle on the first projection plane, which is convenient for adjusting the dimensions of the armature assembly 38 along the X-axis direction and the Y-axis direction, and creates more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0140] In this embodiment, permanent magnets 50 are arranged on both sides of the intersecting portion 59 along the Y axis, and the two magnetic poles 54 of the permanent magnet 50 are arranged along the X axis direction. Without increasing the size of the armature assembly 38 along the X axis direction and the Z axis direction, the space occupied by the armature assembly 38 is fully utilized to increase the magnetic force between the magnetic drive end 45 and the armature assembly 38, which is more conducive to increasing the safety distance between the moving contact assembly 72 and the static contact assembly 7. Since each permanent magnet 50 is connected together by two armatures 51, the difference in strength of the magnetic field of each permanent magnet 50 is effectively weakened on the two armatures 51, and the magnetic driving force between the suction portion 60 on both sides and the magnetic drive end 45 can be more balanced along the X axis direction, so the relay 1 is less likely to get stuck and has a longer service life.

[0141] In this 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 magnetic field strength of the armature assembly 38 on both sides along the Y-axis direction is more consistent, and the center of gravity is easier to maintain 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 get stuck and has a longer 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 72 and the static contact group 7 in a limited space.

[0142] In this embodiment, the two moving contacts 87 of the moving contact 85 are arranged along the Y-axis direction and fixedly connected to the overcurrent bridge 86 extending along the Y-axis direction, so that the current passing through the overcurrent bridge 86 can flow along the Y-axis direction, which is convenient for forming a magnetic circuit for anti-short circuit. The anti-short circuit magnetic circuit is used to enable the moving contact group 72 to be more reliably closed with the static contact group 7. When the relay 1 is subjected to a large fault current, it is beneficial to prevent the moving contact group 72 from detaching from the static contact group 7, thereby avoiding destructive arcing and causing damage to the relay 1.

[0143] In this embodiment, the number of the moving contacts 85 in the moving contact group 72 is more than two, and each moving contact 85 is arranged along the Z-axis direction. Therefore, when the moving contact group 72 and the stationary contact group 7 are closed, each moving contact 85 is connected in parallel with each other, which can increase the load capacity of the relay 1 and reduce the contact resistance between the moving contact 87 and the stationary contact 20. At the same time, combined with the technical means of extending the overcurrent bridge 86 along the Y-axis direction and the technical means of moving the moving contact 85 along the X-axis direction, the relay 1 can make fuller use of the space in all directions, and the structure is more compact, creating more favorable conditions for increasing the safe distance between the moving contact group 72 and the stationary contact group 7 in a limited space.

[0144] In this embodiment, the connecting terminal 21 of at least one static contact 19 is located between the static 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 it less likely for short circuit between the two static contacts 19, and can meet the requirements for installation of external transformers.

[0145] In this embodiment, the eighth current-passing portion 34 of the second static contact 23 forms a cross-current portion, which is located outside the moving contact group 72 along the Y-axis direction and connected to the connection terminal 21 along the disconnection direction. The magnetic field generated by the current in the cross-current portion acts on the overcurrent bridge 86 whose overcurrent direction is the Y-axis direction, and generates a magnetic force toward the static contact group 7 on the overcurrent bridge 86, which enables the moving contact group 72 to be more reliably closed with the static contact group 7. Since the magnetic force increases with the increase of current, when the relay 1 is subjected to a large fault current, it is helpful to prevent the moving contact group 72 from being separated from the static contact group 7, thereby preventing the destructive arc from causing damage to the relay 1.

[0146] In this embodiment, the moving magnet group 73 and the static magnet group 8 form an anti-short circuit magnetic circuit M1 when the current bridge 86 flows along the Y-axis direction, so that the moving magnet group 73 and the moving contact group 72 are subjected to magnetic force in the closing direction, so that the moving contact group 72 can be more reliably closed with the static contact group 7. Since the magnetic force increases with the increase of current, it is helpful to prevent the moving contact group 72 from being separated from the static contact group 7 when the relay 1 is subjected to a large fault current, thereby avoiding destructive arcing and causing damage to the relay 1.

[0147] In this embodiment, the moving magnetizer 90 is arranged corresponding to the moving contact 85, so that an anti-short-circuit magnetic circuit M1 can be formed around each moving contact 85, so that each moving contact 85 is not easy to separate from the static contact group 7. The magnetic body 91 is fixed to the back of the overcurrent bridge 86, so that most of the magnetic field generated by the current of the overcurrent bridge 86 can be confined in the anti-short-circuit magnetic circuit, thereby improving the magnetic efficiency. The extension 92 extends from the magnetic body 91 along the closing direction, so when the moving contact group 72 and the static contact group 7 are closed, the air gap between the moving magnetizer 90 and the static magnetizer 8 is smaller, the magnetic resistance of the anti-short-circuit magnetic circuit M1 is smaller, and the moving contact group 72 is less likely to separate from the static contact group 7. Therefore, the moving contact group 72 can be closed more reliably with the static contact group 7, which is conducive to preventing the moving contact group 72 from separating from the static contact group 7 when the relay 1 is subjected to a large fault current, thereby avoiding destructive arcing and causing damage to the relay 1.

[0148] In this embodiment, the static conductive magnet 8 is fixed to the receiving member 6, so that the static conductive magnet 8 is easier to install.

[0149] In this embodiment, the static contacts 20 of the two static contacts 19 are respectively located on both sides of the static magnet 8 along the Y-axis direction, so that the magnetic force formed by the anti-short-circuit magnetic circuit M1 formed by the static magnet 8 and the dynamic magnet group 73 on the dynamic contact group 72 is more balanced along the Y-axis direction, and the two dynamic contacts 87 are not easy to disengage from the corresponding static contacts 20.

[0150] In this embodiment, the flow direction of the reverse flow part is opposite to the flow direction of the overcurrent bridge 86, and the static conductive magnet 8 is located between the reverse flow part and the dynamic conductive magnet group 73 along the X-axis direction. Therefore, the direction of the magnetic flux lines of the magnetic field generated by the overcurrent in the reverse flow part on the side where the static conductive magnet 8 is located is the same as the direction of the magnetic flux lines formed by the anti-short-circuit magnetic circuit M1 on the side where the static conductive magnet 8 is located, thereby enhancing the magnetic field strength of the static conductive magnet 8 and making the magnetic force formed between the static conductive magnet 8 and the dynamic conductive magnet group 73 stronger. When the relay 1 is subjected to a large fault current, the moving contact group 72 is less likely to detach from the static contact group 7, thereby avoiding destructive arcing and causing damage to the relay 1.

[0151] In this embodiment, the second surface S2 is closer to the moving magnet group 73 than the first surface S1 along the X-axis direction, so the static magnet 8 is not embedded between the two static contacts 19 except the static contact 20 along the Y-axis direction, which increases the creepage distance between the static contact 19 and the static magnet 8, and improves the withstand voltage of the relay 1. At the same time, it is also beneficial to reduce the distance between the two static contacts 20 along the Y-axis direction, which is beneficial to reduce the size of the accommodating member 6 along the Y-axis direction, and can create more favorable conditions for increasing the safe distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0152] In this embodiment, the projections of the parts of all the static contacts 20 suitable for contacting the moving contact group 72 on the second projection plane perpendicular to the Y-axis direction are all located within the projection of the static conductive magnet 8 on the second projection plane, and the surface of the static conductive magnet 8 facing the moving conductive magnet group 73 is closer to the moving conductive magnet group 73 than all the static contacts 20 along the X-axis direction. Therefore, when the moving contact group 72 separates the arc from the static contact group 7, the magnetic field generated by the arcs on both sides gathers on the static conductive magnet 8, making it difficult for the arc to propagate to both sides along the Y-axis direction, which can reduce the erosion of the surrounding accommodating member 6 by the arc escape between the moving contact 87 and the static contact 20, and ensure the service life of the relay 1. On this basis, the distance between the two static contacts 20 along the Y-axis direction can be designed to be closer, which is conducive to reducing the size of the accommodating member 6 along the Y-axis direction, and can create more favorable conditions for increasing the safe distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0153] In this embodiment, two blocking members 9 are fixed to the accommodating member 6 and are located outside the static contact group 7 along the Y-axis direction. Each blocking member 9 extends along the X-axis direction so that the projection of the portion of each static contact 20 suitable for contacting the moving contact 87 on the second projection plane perpendicular to the Y-axis direction is located within the projection of each blocking member 9 on the second projection plane. Therefore, when the moving contact group 72 separates the arc from the static contact group 7, the arc will not be transmitted to the two side walls of the accommodating member 6 along the Y-axis direction, ensuring the insulation performance of the accommodating member 6. The blocking member 9 is made of high-temperature resistant insulating material, which can prevent the heat of the arc from destroying the blocking member 9 when the load is large and the arc generates a lot of heat, avoiding damage to the blocking member 9, which is beneficial to improving the load capacity of the relay 1.

[0154] In this embodiment, the elastic bracket group 74 is disposed between the pusher 70 and the movable contact group 72, and can provide elastic force to the movable contact group 72 along the closing direction X1 after the pusher 70 experiences an overtravel, so that the movable contact group 72 can be more reliably closed with the stationary contact group 7, and when the relay 1 is subjected to a large fault current, the movable contact group 72 is less likely to be separated from the stationary contact group 7, thereby avoiding destructive arcing and causing damage to the relay 1. The elastic bracket group 74 can also generate additional repulsive force when the movable contact group 72 is disconnected from the stationary contact group 7, helping the movable contact 85 to be disconnected from the stationary contact group 7.

[0155] In this embodiment, by providing the limiting member 76 , it can be ensured that when the moving contact member group 72 is disconnected from the stationary contact member group 7 , the distance between the moving contact member group 72 and the stationary contact member group 7 meets the design requirements.

[0156] In this embodiment, the armature assembly 38 and the pusher 70 are integrally formed by insert injection molding, which avoids errors that may occur during the assembly of the armature assembly 38 and the pusher 70, and also makes the pusher 70 and the armature assembly 38 more integrated with fewer parts, which is conducive to making full use of limited space.

[0157] In this embodiment, the connecting member 71 and the pushing member 70 are insert-molded as one piece, so that the limiting member 76 is easier to fix relative to the pushing member 70, and the limiting member 76 is more rigid, which has a better limiting effect on the moving contact group 72 and can also save the size of the relay 1 along the Y-axis direction; the two ends of the connecting member 71 along the Z-axis direction respectively extend out of the pushing member 70 to form a connecting end 84 fixedly connected to the limiting member 76, which can save the size of the relay 1 along the Z-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 a limited space.

[0158] In this embodiment, the first elastic portion 95 is arranged corresponding to the moving contact 85, and each moving contact 85 is fixedly connected to the corresponding first elastic portion 95. Therefore, the posture of each moving contact 85 can be adjusted by the relatively independent first elastic portion 95, which is more conducive to the two moving contacts 87 of the moving contact 85 to reliably close with the corresponding static contact 20.

[0159] In this embodiment, the first elastic part 95 includes two first elastic arms 97 fixedly connected to the overcurrent bridge 86, which is conducive to the free swinging of the movable contact 85 to adjust the posture. The positions where the two first elastic arms 97 are fixedly connected to the overcurrent bridge 86 are respectively located on the back of the corresponding movable contact 87, so that the elastic force of the two first elastic arms 97 can directly act on the two movable contacts 87, and can further ensure that the two movable contacts 87 are reliably closed with the corresponding static contacts 20.

[0160] In this embodiment, the elastic member 75 stores energy due to deformation when the pushing member 70 moves along the disconnecting direction X2 and releases energy due to restoring the deformation when the pushing member 70 moves along the closing direction X1. This can better help the moving contact group 72 to start from the disconnected position and approach the static contact group 7, which is beneficial to increase the movement stroke of the moving contact group 72, and therefore also helps to increase the safety distance between the moving contact group 72 and the static contact group 7.

[0161] In this embodiment, the main body 98 of the elastic member 75 is sheet-shaped and fixed relative to the pushing member 70, and the second elastic arm 101 extends on both sides of the Y-axis direction and is suitable for abutting the accommodating member 6, which can make the elastic member 75 occupy a smaller space along the X-axis direction and have good elastic deformation ability, avoiding the compression length of the spring increasing the size of the moving contact part 4 along the X-axis direction when using the spring as the elastic member 75, thereby helping to reduce the size of the relay 1 along the X-axis direction, and thus creating more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0162] In the present embodiment, the guide portion 109 is centrally disposed along the Y-axis direction. Compared with the guide portions 109 disposed on both sides along the Y-axis direction, the space along the Y-axis direction can be saved, and the size of the relay 1 along the Y-axis direction can be avoided from increasing. At the same time, the guide portions 109 on both sides along the Y-axis direction can be avoided from being stuck during movement, which may be caused by the non-parallelism of the guide portions 109 on both sides along the Y-axis direction. This makes it difficult for the magnetic driving force of the magnetic circuit portion 3 to be wasted on useless work, 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.

[0163] In this embodiment, since the limit member 76 has been abutting the moving contact group 72 before the pushing member 70 moves along the closing direction X1 into the overstroke, and when entering the overstroke, the moving contact 87 has already abutted the corresponding static contact 20, the first guide portion 103 is set on the limit member 76, which can better guide the moving contact 85 to move along the X-axis direction, so that the moving contact 87 can correctly abut the static contact 20 along the X-axis direction, reduce the contact resistance between the moving contact 87 and the static contact 20, and shorten the arc pulling time when the moving contact 87 and the static contact 20 are disconnected, which is beneficial to increase the service life of the moving contact 72 and the static contact 20. This is because the guide portion 109 and the slide groove 13 slide in cooperation along the X-axis direction, and a fitting gap is inevitably formed between the two. If the guide portion 109 is far away from the moving contact 72 along the X-axis direction, the fitting gap will be magnified during the movement of the moving contact 72, making it impossible for the moving contact 87 to properly contact the static contact 20 along the X-axis direction, thereby increasing the contact resistance between the moving contact 87 and the static contact 20, and also making the arc pulling time longer when the moving contact 87 is disconnected from the static contact 20, which is not good for the life of the moving contact 87 and the static contact 20.

[0164] In this embodiment, the first guide portion 103 is disposed on the stopper 76, which means that the slide groove 13 is disposed on the accommodating member 6. Since the static contact member group 7 is fixedly connected to the accommodating member 6, the slide groove 13 is disposed on the accommodating member 6 to ensure that the extension direction of the slide groove 13 is perpendicular to the arrangement direction of the static contact points 20 of the two static contacts 19, so that the slide groove 13 guides the guide portion 109 more accurately along the X-axis direction.

[0165] In this embodiment, the first guide portion 103 is located at the front part of the limiting body 102 along the closing direction, so that the first guide portion 103 is closer to the moving contact 87 along the X-axis direction, which is more conducive to the moving contact 87 to correctly contact the static contact 20 along the X-axis direction, thereby reducing the contact resistance between the moving contact 87 and the static contact 20, and shortening the arc pulling time when the moving contact 87 and the static contact 20 are disconnected, which is beneficial to increase the service life of the moving contact 87 and the static contact 20.

[0166] In this embodiment, the projection of the first guide portion 103 on the first projection plane is circular, which helps to avoid jamming of the sliding cooperation between the first guide portion 103 and the slide groove 13 .

[0167] In this embodiment, the material of the first guide portion 103 is plastic, which is conducive to avoiding scraping of the plastic receiving part 6 when the first guide portion 103 is made of metal, thereby preventing the scraping from falling on the moving contact 87 and the static contact 20, thereby affecting the contact resistance between the moving contact 87 and the static contact 20. The material of the limiting body 102 is metal, so it has stronger rigidity and better limiting effect on the moving contact group 72. The first guide portion 103 and the limiting body 102 are molded as a whole by insert injection molding, and the combination of the two is better. The position of the first guide portion 103 along the Y-axis direction is more accurate, which is conducive to better sliding cooperation with the slide groove 13 along the X-axis direction.

[0168] In this embodiment, the first guide portion 103 cooperates with the second guide portion 78, and can better keep the movable contact portion 4 moving along the X-axis direction by sliding along the X-axis direction with the slide groove 13. The second guide portion 78 is arranged on the push body 77, so that there is a certain distance between the first guide portion 103 and the second guide portion 78 along the X-axis direction, which is more conducive to not enlarging the matching gap between the guide portion 109 and the slide groove 13.

[0169] In this embodiment, the armature assembly 38 and the pushing member 70 are integrally formed by insert injection molding, and the second guide portion 78 is arranged on the pushing member 70, which is beneficial to guiding each suction portion 60 to be sucked in with the corresponding magnetic drive end 45 along the X-axis direction, and avoiding that when only the first guide portion 103 is set, the matching gap between the first guide portion 103 and the slide groove 13 is enlarged at the pushing member 70, so that the suction portion 60 cannot be correctly sucked in with the magnetic drive end 45 along the X-axis direction, and ensure that after the suction portion 60 sucks the magnetic drive end 45, there is no air gap between the first part of the armature assembly 38 and the second part of the coil assembly 37, thereby improving the magnetic efficiency and increasing the magnetic driving force, and thus helping to increase the safety distance between the moving contact group 72 and the static contact group 7.

[0170] In this embodiment, the projection of the second guide portion 78 on the first projection plane is circular, which helps to avoid jamming of the sliding cooperation between the second guide portion 78 and the slide groove 13 .

[0171] In this embodiment, regardless of whether the first slot section 14 and the second slot section 15 are connected, since both are formed in the receiving member 6 , it is possible to ensure that the slide slot 13 extends along the X-axis direction.

[0172] In this embodiment, by providing the micro switch 5, the external relay state sensing circuit can be informed of the on / off state of the relay 1, so as to facilitate the management of the relay 1.

[0173] In this embodiment, the stationary contact terminal 110 is located between the movable 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, and avoid increasing the size of the accommodating member 6 along the Y-axis direction when the stationary contact terminal 110 is arranged outside the coil assembly 37 along the Y-axis direction, creating more favorable conditions for increasing the safe distance between the movable contact member group 72 and the stationary contact member group 7 in a limited space. The movable spring 83 is fixedly connected to the pusher 70, so that the position and movement of the movable spring 83 are more certain.

[0174] In this embodiment, by providing a shielding cover 39, the magnetic field of the coil assembly 37 is compressed within the iron core 43 and the yoke 44, thereby increasing the magnetic field strength between the two magnetic drive ends 45, which is beneficial to improving the magnetic efficiency and the driving force of the magnetic circuit portion 3, and can create more favorable conditions for increasing the safe distance between the moving contact group 72 and the static contact group 7 in a limited space, while also preventing the magnetic circuit portion 3 from being affected by the external magnetic field.

[0175] Embodiment 2

[0176] The difference between the second embodiment and the first embodiment lies in the magnetic circuit part 3. The rest of the parts are basically the same as the first embodiment.

[0177] In the magnetic circuit part 3 , the coil assembly 37 in the second embodiment is the same as the coil assembly 37 in the first embodiment. The difference lies in the armature assembly 38 and the shielding cover 39 .

[0178] See also Figures 27 to 30 , Fig. 27 and Fig.30 The armature assembly 38 in the second embodiment is shown. Fig. 27 and Fig.28As shown, in this 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 respectively fixed to the two magnetic poles 54 of the permanent magnet 50 and correspond to one polarity respectively, and are each provided with two suction parts 60. Specifically, the first armature 57 and the second armature 58 are each provided with a fixing part 111 fixed to one magnetic pole 54 of the permanent magnet 50. The fixing part 111 of the first armature 57 is a first fixing part 112, and the first fixing part 112 is fixed to the first magnetic pole 55 of the permanent magnet 50. The fixing part 111 of the second armature 58 is a second fixing part 113, and the second fixing part 113 is fixed to the second magnetic pole 56 of the permanent magnet 50. The two fixing parts 111 are both perpendicular to the Z-axis direction and are plate-shaped. The two suction parts 60 of each armature 51 extend from the fixing part 111 along the Z-axis direction. Here, "the suction part 60 extends from the fixing part 111 along the Z-axis direction" means that the suction part 60 as a whole extends from the edge of the fixing part 111 along the Z-axis direction. Specifically, the first suction part 61 and the second suction part 62 extend downward from the left front side and the right rear side of the first fixing part 112 along the Z-axis direction, respectively, and are both spaced apart from the permanent magnet part 50 along the X-axis direction; the third suction part 63 and the fourth suction part 64 extend upward from the right front side and the left rear side of the second fixing part 112 along the Z-axis direction, respectively, and are both spaced apart from the permanent magnet part 50 along the X-axis direction. In this embodiment, the armature 51 is formed by bending a plate or sheet, and a first dimension is formed along the Y-axis direction at the intersection of the suction portion 60 and the fixing portion 111, and a second dimension is formed along the X-axis direction at the fixing portion 111 and the magnetic pole 54 of the permanent magnet 50. The ratio of the first dimension to the second dimension is between 0.6 and 1.4. Specifically, in this embodiment, the two are equal and greater than 0.8.

[0179] like Fig.28 and Fig.29As shown, the top of each suction part 60 along the extension direction thereof forms a suction part avoidance structure 115, and the two suction part avoidance structures 115 corresponding to the other suction part avoidance structure 114 of the fixing part 111 of each armature 51 form the fixing part avoidance structure 114, wherein the extension direction of the suction part 60 of each armature 51 refers to the direction of the suction part 60 from the fixing part 111 toward the fixing part 111 of the other armature 51 along the Z-axis direction, and the top of the suction part 60 along the extension direction refers to the end of the suction part 60 close to the fixing part 111 of the other armature 51 along the Z-axis direction. Through the suction part avoidance structure 115 and the fixing part avoidance structure 114, a gap is formed between the top of each suction part 60 of each armature 51 and the fixing part 111 of the other armature 51 along the X-axis direction and the Y-axis direction. In this embodiment, the fixing portion avoidance structure 114 is a fixing portion corner. In this embodiment, the fixing portion corner is formed by the fixing portion 111 by setting an inclined surface parallel to the Z-axis direction. In other embodiments, the fixing portion corner may also be other shapes. In this embodiment, the suction portion avoidance structure is a suction portion corner. In this embodiment, the suction portion corner is formed by the suction portion 60 by setting an inclined surface parallel to the X-axis direction. In other embodiments, the suction portion corner may also be other shapes.

[0180] Specifically, Fig.29As shown, the first fixed portion 112 of the first armature 57 is provided with a first fixed portion avoidance structure 116 and a second fixed portion avoidance structure 117 at both sides along the Y-axis direction, the first fixed portion avoidance structure 116 is used to avoid the top of the third suction portion 63, and the second fixed portion avoidance structure 117 is used to avoid the top of the fourth suction portion 64. The top of the first suction portion 61 of the first armature 57 is provided with a first suction portion avoidance structure 120, the first suction portion avoidance structure 120 is used to avoid the second fixed portion 113, and the top of the second suction portion 62 of the first armature 57 is provided with a second suction portion avoidance structure 121, the second suction portion avoidance structure 121 is used to avoid the second fixed portion 113. The second fixed portion 113 of the second armature 58 is provided with a third fixed portion avoidance structure 118 and a fourth fixed portion avoidance structure 119 on both sides along the Y-axis direction, and the third fixed portion avoidance structure 118 is used to avoid the top of the second suction portion 62, and the fourth fixed portion avoidance structure 119 is used to avoid the top of the first suction portion 61. The top of the third suction portion 63 of the second armature 58 is provided with a third suction portion avoidance structure 122, and the third suction portion avoidance structure 122 is used to avoid the first fixed portion 112. The top of the fourth suction portion 64 of the second armature 59 is provided with a fourth suction portion avoidance structure 123, and the fourth suction portion avoidance structure 123 is used to avoid the first fixed portion 112. In this embodiment, the first fixed portion avoidance structure 116, the second fixed portion avoidance structure 117, the third fixed portion avoidance structure 118 and the fourth fixed portion avoidance structure 119 are all fixed portion avoidance structures 114. The first suction portion avoidance structure 120 , the second suction portion avoidance structure 121 , the third suction portion avoidance structure 122 and the fourth suction portion avoidance structure 123 are all suction portion avoidance structures 115 .

[0181] Among them, the first fixed part avoidance structure 116 and the third suction part avoidance structure 122 are correspondingly arranged, so that the top of the first fixed part 112 and the third suction part 63 form a gap along the X-axis direction and the Y-axis direction. The second fixed part avoidance structure 117 and the fourth suction part avoidance structure 123 are correspondingly arranged, so that the top of the first fixed part 112 and the fourth suction part 64 form a gap along the X-axis direction and the Y-axis direction. The third fixed part avoidance structure 118 and the second suction part avoidance structure 121 are correspondingly arranged, so that the top of the second fixed part 113 and the second suction part 62 form a gap along the X-axis direction and the Y-axis direction. The fourth fixed part avoidance structure 119 and the first suction part avoidance structure 120 are correspondingly arranged, so that the second fixed part 1132 and the top of the first suction part 61 form a gap along the X-axis direction and the Y-axis direction.

[0182] like Fig.30As shown, in this embodiment, the top of the suction portion 60 of each armature 51 is flush with the surface where the fixing portion 111 of another armature 51 is fixed to the magnetic pole 54 of the permanent magnet 50 along the extension direction of the suction portion 60. In other embodiments, the top of the suction portion 60 of each armature 51 may exceed the surface where the fixing portion 111 of another armature 51 is fixed to the magnetic pole 54 of the permanent magnet 50 along the extension direction thereof.

[0183] The operation principle of the magnetic circuit part 3 in this embodiment is basically the same as that of the magnetic circuit part 3 in Embodiment 1. In this embodiment, the projection of the armature assembly on the first projection plane perpendicular to the Z-axis direction is mirror-symmetrical along the symmetry plane perpendicular to the Y-axis.

[0184] See also Fig.31 , Fig.31 FIG. 3 shows a shielding cover 39 in this embodiment. Fig.29 As shown, the shielding cover 39 is fixed to the outer surface of the accommodating member 6 and is disposed outside the coil winding 41 along the Z-axis direction and the X-axis direction.

[0185] Embodiment 2 is a further improvement of embodiment 1. In embodiment 1, if the permanent magnets 50 on both sides of the intersecting portion 59 along the Y-axis direction are formed by magnetizing magnetic steel, the permanent magnets 50 on both sides need to be magnetized twice to complete because the directions of the magnetic poles 54 are opposite along the X-axis direction. This will lead to at least two problems. The first problem is that there is a risk of incorrect magnetizing direction of the magnetic steel. The second problem is that if the two magnetic steels are close in the Y-axis direction, the second magnetization may cause the magnetic steel demagnetization during the first magnetization, resulting in poor consistency of magnetic parameters of the permanent magnets 50 on both sides. In this embodiment, even if there are more than one permanent magnets 50, since 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 one magnetization can be completed, so the above two problems are well solved, which is conducive to ensuring that the magnetic field strength of the suction part 60 on both sides of the armature assembly 38 along the Y-axis direction is consistent, and at the same time, it can also ensure that the two armatures 51 have a large contact area with the permanent magnet 50 to improve the magnetic cross-section and magnetic efficiency.

[0186] In this embodiment, the suction portion 60 is extended from the fixing portion 111 along the Z-axis direction, which can avoid a sudden change in the magnetic cross-section due to the perpendicular extension direction of the fixing portion 111 and the suction portion 60 .

[0187] In the present embodiment, each suction part 60 and the fixed part 111 of another armature 51 form a gap along the X-axis direction and a gap along the Y-axis direction through the suction part avoidance structure 115 and the fixed part avoidance structure 114. Compared with only providing an avoidance structure on the suction part 60 but not on the fixed part 111, it is possible to avoid a reduction in the suction area with the magnetic drive end 45 due to the suction part 60 being too small along its extension direction. The reduction in the suction area will lead to a reduction in the suction force at one end of the suction part 60 away from the fixed part 111 of the same armature 51, thereby causing the armature assembly 38 to form a rotational force perpendicular to the X-axis direction relative to the coil assembly 37, and the magnetic suction effect is not reliable.

[0188] In the present embodiment, each suction part 60 and the fixing part 111 of another armature 51 form a gap along the X-axis direction and a gap along the Y-axis direction through the suction part avoidance structure 115 and the fixing part avoidance structure 114. Compared with only providing the avoidance structure in the fixing part 111 but not in the suction part 60, it is possible to avoid reducing the length of one of the fixing part 111 and the suction part 60 along the Y-axis direction, thereby avoiding the weak magnetic attraction and magnetic holding force due to the inability to increase the volume of the permanent magnet 50, and avoiding the reduction of the magnetic conductive cross-section due to the reduction of the size of the intersection of the fixing part 111 and the suction part 60 along the Y-axis direction. The reduction of the magnetic conductive cross-section will lead to an increase in magnetic resistance and a decrease in magnetic conductive efficiency, a slow response speed of the armature assembly 38 and a weakening of the magnetic attraction and magnetic holding force.

[0189] Specifically, in the armature assembly 38, since the two armatures 51 are respectively fixed to the two magnetic poles of the permanent magnet 50 and are used to bear different polarities, the design of the armature assembly 38 usually needs to consider the isolation problem of the two armatures 51, that is, in the armature assembly 38, the two armatures 51 cannot directly contact each other, otherwise it will cause a magnetic short circuit, and lead to a decrease in magnetic efficiency and a decrease in the required magnetic holding force, which is not conducive to improving the stability and anti-interference strength of the relay 1. In this embodiment, each suction portion 60 and the fixing portion 111 of another armature 51 are designed to be spaced along the X-axis direction and the Y-axis direction. Therefore, the length of the fixing portion 111 along the Y-axis direction can be set without being limited to the spacing between the two suction portions 60 arranged along the Y-axis direction. The length of the two suction parts 60 extending along the Z-axis direction can also be set to be longer, and the length of the intersection of the suction part 60 and the fixing part 111 along the Y-axis direction can also be set to be larger, wherein the increase in the size of the fixing part 111 along the Y-axis direction is conducive to the arrangement of a larger volume of the permanent magnet 50, thereby improving the magnetic efficiency and the magnetic holding force that can be obtained; the length of the two suction parts 60 extending along the Z-axis direction is set to be longer, so that the area of ​​the suction part 60 used to attract the magnetic drive end 45 is larger, the magnetic attraction force is larger, and the magnetic attraction stability is also higher; the length of the intersection of the suction part 60 and the fixing part 111 along the Y-axis direction is set to be larger, which is conducive to uniformly changing the magnetic conductive area, reducing magnetic resistance, and improving magnetic conductive efficiency and magnetic attraction.

[0190] In this embodiment, the fixing part and the suction part are formed with inclined surfaces, and then the fixing part avoidance structure 114 and the suction part avoidance structure 115 are formed correspondingly, so that the magnetic conductive cross-section transition between the fixing part 111 and the suction part 60 is uniform, which can reduce leakage magnetic flux, ensure magnetic efficiency, and keep the suction surface of the suction part 60 at a larger size, so that the volume of the permanent magnet 50 can be increased, so that the magnetic conductive efficiency is higher, and the magnetic attraction and magnetic holding force are greater.

[0191] In this embodiment, since the fixed portion 111 and the suction portion 60 are avoided at the same time, the top end of the suction portion 60 of each armature 51 can be flush with or exceed the surface of the fixed portion 111 of another armature 51 fixed to the magnetic pole 54 of the permanent magnet 50 along its extension direction, thereby ensuring the suction area between the suction portion 60 and the magnetic drive end 45, thereby avoiding or reducing the rotational force of the armature assembly 38.

[0192] In this embodiment, the two armatures 51 are both formed by bending a plate or sheet, which can reduce the manufacturing difficulty and cost, and has material consistency, avoiding changes in the magnetic cross-section due to material splicing.

[0193] In this embodiment, the ratio of the first dimension to the second dimension is between 0.6 and 1.4, which can ensure that the overall magnetic conductivity efficiency of the armature 51 is relatively consistent at the key position, avoiding the reduction of the magnetic cross-section and the reduction of the magnetic efficiency due to the inconsistent extension directions of the suction part 60 and the fixing part 111 and the large difference between the first dimension and the second dimension.

[0194] In this embodiment, the ratio of the minimum magnetic conductive cross-section to the maximum magnetic conductive cross-section of the armature 51 is greater than or equal to 0.8, which can ensure the magnetic conductive efficiency of the armature 51 and avoid reducing the magnetic conductive cross-section and lowering the magnetic efficiency due to the different extension directions of the suction part 60 and the fixing part 111.

[0195] In this embodiment, there is only one permanent magnet 50, so the structure is simple, and the cost of the armature assembly 38 is reduced. This embodiment is also conducive to increasing the size of the permanent magnet 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 greater, and the magnetic driving force of the magnetic drive end 45 on the armature assembly 38 is also greater, which can create more favorable conditions for increasing the safe distance between the moving contact assembly 72 and the static contact assembly 7 in a limited space.

[0196] In this 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 magnetic field strength of the armature assembly 38 on both sides along the Y-axis direction is more consistent, and the center of gravity is easier to maintain 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 get stuck and has a longer 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 72 and the static contact group 7 in a limited space.

[0197] The above specification and description of the embodiments are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application.

Claims

1. A magnetic circuit part, characterized in that: It includes a coil assembly and an armature assembly; the coil assembly is provided with two magnetic drive ends arranged along the Y-axis direction; the armature assembly includes a permanent magnet and two armatures, the two magnetic poles of the permanent magnet are arranged along the Z-axis direction, the two armatures are respectively fixed to the two magnetic poles of the permanent magnet and correspond to a polarity respectively, and are each provided with two suction parts, each suction part is suitable for suctioning the corresponding magnetic drive end along the X-axis direction; the coil assembly is stimulated by a pulse electrical signal to reverse the polarity temporarily formed by the two magnetic drive ends, so as to switch and suction different parts of the two armatures in the X-axis direction and drive the armature assembly to move along the X-axis direction.

2. A magnetic circuit portion as claimed in claim 1, characterized in that: Each armature is provided with a fixing portion fixed to the magnetic pole of the permanent magnet, and two suction portions are extended from the fixing portion along the Z-axis direction.

3. A magnetic circuit portion as claimed in claim 2, characterized in that: A suction part avoidance structure is formed at the top end of each suction part along its extension direction, and the suction part avoidance structure of the two suction parts of each armature corresponding to the fixing part avoidance structure of the other armature forms a fixing part avoidance structure; through the suction part avoidance structure and the corresponding fixing part avoidance structure, a gap is formed between the top end of each suction part of each armature and the fixing part of the other armature along the X-axis direction and the Y-axis direction.

4. A magnetic circuit portion as claimed in claim 3, characterized in that: The fixing portion avoidance structure is a fixing portion with a missing corner, and the suction portion avoidance structure is a suction portion with a missing corner.

5. A magnetic circuit portion as claimed in claim 4, characterized in that: The missing corner of the fixing portion is formed by setting an inclined surface parallel to the Z-axis direction on the fixing portion, and the missing corner of the suction portion is formed by setting an inclined surface parallel to the X-axis direction on the suction portion.

6. A magnetic circuit portion according to any one of claims 3 to 5, characterized in that: The top end of the suction portion of each armature is flush with or exceeds the surface where the fixing portion of another armature is fixed to the magnetic pole of the permanent magnet along the extension direction of the suction portion.

7. A magnetic circuit portion as claimed in claim 2, characterized in that: Both armatures are formed by bending a plate or sheet.

8. A magnetic circuit portion as claimed in claim 2, characterized in that: The dimension of the intersection of the suction portion and the fixing portion along the Y-axis direction is a first dimension; the dimension of the fixing portion and the magnetic pole of the permanent magnet part fixedly connected along the X-axis direction is a second dimension; the ratio of the first dimension to the second dimension is between 0.6 and 1.

4.

9. A magnetic circuit portion as claimed in claim 1, characterized in that: The number of the permanent magnets is at least two, and the magnetic poles of the permanent magnets have the same polarity direction.

10. A magnetic circuit portion as claimed in claim 1, characterized in that: The number of permanent magnets is one.

11. A magnetic circuit portion as claimed in claim 1, characterized in that: The projection of the armature assembly on the first projection plane perpendicular to the Z-axis direction is mirror-symmetrical with respect to the symmetry plane perpendicular to the Y-axis direction.

12. A magnetic circuit portion according to claim 1, characterized in that: The two armatures are respectively the first armature and the second armature, the two suction parts of the first armature are respectively the first suction part and the second suction part, and the two suction parts of the second armature are respectively the third suction part and the fourth suction part; the armature assembly moves between the first position and the second position along the X-axis direction; in the first position, the first suction part and the third suction part respectively suction the two magnetic drive ends; in the second position, the fourth suction part and the second suction part respectively suction the two magnetic drive ends.

13. A magnetic circuit portion as claimed in claim 12, characterized in that: The first suction part and the third suction part are arranged along the Y axis direction, the fourth suction part and the second suction part are arranged along the Y axis direction, the first suction part and the fourth suction part are arranged along the X axis direction, and the third suction part and the second suction part are arranged along the X axis direction.

14. The magnetic circuit portion according to claim 1, characterized in that: The coil assembly includes a coil winding, an iron core and two yokes; the axis of the coil winding extends along the Y-axis direction; the iron core is placed in the coil winding along the Y-axis direction, one end of the two yokes is fixed to the iron core, and the other end forms the magnetic drive end.

15. A magnetic latching relay, characterized in that: It comprises a stationary contact group, a moving contact group and a magnetic circuit portion as described in any one of claims 1 to 14; the stationary contact group comprises two stationary contacts; the moving contact group is driven by the armature assembly to close or open with the stationary contact group along the X-axis direction to conduct or disconnect the electrical connection between the two stationary contacts.

16. An electric meter, characterized in that: Comprising the magnetic latching relay as claimed in claim 15.

Images