Magnetic circuit part, magnetic latching relay, and electric meter

Abstract

The present application relates to a magnetic circuit part (3), a magnetic latching relay, and an electric meter. The magnetic circuit part (3) comprises a coil assembly (37) and an armature assembly (38); the coil assembly (37) is provided with two magnetic drive ends (45) arranged in a Y-axis direction; the armature assembly (38) comprises permanent magnets (50) and two armatures (51), two magnetic poles of each permanent magnet (50) are arranged in a Z-axis direction, the two armatures (51) are respectively fixedly connected to the two magnetic poles of each permanent magnet (50) and each correspond to one polarity, and are both provided with two attraction portions (60) arranged in an X-axis direction, and each attraction portion (60) can attract a corresponding magnetic drive end (45) in the X-axis direction; the coil assembly (37) is excited by a pulsed electrical signal to reverse the polarities temporarily formed by the two magnetic drive ends (45), so as to switch between different attraction portions (60) of the two armatures (51) in the X-axis direction for attraction and drive the armature assembly (38) to move in the X-axis direction. The magnetic latching relay and the electric meter comprise the magnetic circuit part (3).

Description

A magnetic circuit part, a magnetic latching relay and an electric meter

[0001] Related Applications

[0002] The present application claims priority to Chinese Patent Application No. 202411613921.5, filed on November 12, 2024, entitled “A Magnetic Circuit Part, A Magnetic Latching Relay and An Electric Meter”, the contents of which are incorporated herein by reference in their entirety. The present application also claims priority to Chinese Application No. 202410480667.X, filed on April 19, 2024, entitled “A Magnetic Circuit Part, A Magnetic Latching Relay and An Electric Meter”, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of relays, and in particular to a magnetic circuit part, a magnetic latching relay and an electric meter. BACKGROUND

[0004] An intelligent electric meter generally integrates a wiring unit, a communication unit, a measurement unit, a control unit and an execution unit in a meter shell. A relay, as a main component of the execution unit, is controlled by the control unit and acts on the wiring unit to switch the external circuit on and off. In order to save power, the relay in the intelligent electric meter generally adopts a magnetic latching relay. Due to the limited space and high integration in the meter shell, the space that the relay can occupy in the meter shell is very limited, i.e., the relay is required to occupy a space in the meter shell with dimensions in X-axis direction, Y-axis direction and Z-axis direction that are not too large. The relay is provided with a moving contact group and a stationary contact group for on-off control of the circuit. The intelligent electric meter puts forward higher requirements on the load capacity of the magnetic latching relay. In order to adapt to the increase of the load capacity, the safety distance between the moving contact group and the stationary contact group needs to be increased accordingly. For a relay in which the moving contact group and the stationary contact group respectively lead out load terminals, the safety distance between the moving contact group and the stationary contact group is the distance between the moving contact points on the moving contact group and the stationary contact points on the stationary contact group in the direction of disconnection when the moving contact group and the stationary contact group are disconnected.

[0005] The magnetic latching relay in the conventional technology is generally divided into two types: a swing type magnetic latching relay and a direct acting type magnetic latching relay. However, both of the two types of magnetic latching relays in the conventional technology are difficult to increase the safety distance between the moving contact group and the stationary contact group in a limited space.

[0006] The swing type magnetic latching relay comprises a fixed part, a magnetic circuit part and a movable contact part. The fixed part generally comprises a housing and a set of stationary contacts. The magnetic circuit part comprises a coil assembly fixed relative to the housing and an armature assembly swinging relative to the housing. The coil assembly generally comprises a coil winding, a core and two yokes. The core is disposed in the coil winding, and the two yokes are fixed to two ends of the core. The two yokes form two magnetic driving ends at their ends away from the core, and the two magnetic driving ends are arranged along a first direction. The armature assembly comprises a permanent magnet and two armatures. The permanent magnet and the two armatures are arranged in an I-shaped manner, and the two armatures are parallel to each other and sandwich the permanent magnet therebetween. The coil winding is excited by a pulse electrical signal to reverse the polarity of the two magnetic driving ends temporarily formed, so as to drive the armature assembly to swing relative to the housing about a rotation axis perpendicular to the first direction. The movable contact part comprises a swing lever, a pusher and a set of movable contacts. The swing lever is fixed to the armature assembly. The armature assembly drives the swing lever to swing about the rotation axis and drives the pusher to move linearly along a tangent direction of the swing stroke, so as to make the set of movable contacts in the movable contact part close or open with the set of stationary contacts, and correspondingly turn on or turn off an external circuit. In the above technical solution, only the tangential component of the swing stroke of the swing lever can be transmitted to the pusher, and the radial component of the swing stroke of the swing lever is lost. At this time, if it is necessary to increase the safety distance between the set of movable contacts and the set of stationary contacts, it is necessary to increase the linear movement stroke of the pusher, and correspondingly, it is necessary to increase the tangential component of the swing stroke of the swing lever. In order to increase the tangential component of the swing stroke of the swing lever, one solution is to lengthen the radial length of the swing lever, and another solution is to increase the rotation angle of the swing lever. No matter which solution is adopted, it will cause the increase of the space required for the swing of the swing lever and the greater loss of the radial component of the swing stroke of the armature assembly. Therefore, for the swing type magnetic latching relay, in order to increase the safety distance between the set of movable contacts and the set of stationary contacts, it is necessary to increase the volume of the relay, and at the same time, it is necessary to increase the magnetic driving force between the magnetic driving end and the armature assembly, which will further lead to the increase of the energy consumption of the relay and the increase of the volume and weight of the permanent magnet, thereby further increasing the volume of the relay. Due to the above reasons, the swing type magnetic latching relay in the conventional technology is difficult to meet the demand of increasing the safety distance between the set of movable contacts and the set of stationary contacts in a limited space.

[0007] The direct-acting magnetic latching relay in the prior art also comprises a fixed part, a magnetic circuit part and a moving contact part. The fixed part comprises a housing and a static contact group. The magnetic circuit part comprises a coil winding, a static iron core, a yoke plate, a yoke cylinder, a permanent magnet and an armature. The coil winding, the static iron core, the yoke plate, the yoke cylinder and the permanent magnet are fixed to the housing, the armature moves linearly between the yoke plate and the static iron core relative to the housing, and the moving contact part comprises a push rod fixed to the armature, a pusher fixed to the push rod and a moving contact group arranged on the pusher. The push rod moves linearly with the armature and drives the pusher and the moving contact group to close or disconnect with the static contact group, thereby turning on or turning off the external circuit. The direct-acting magnetic latching relay in the prior art is arranged in the order of the push rod, the armature, the coil winding and the yoke cylinder from the inside to the outside along the radial direction. Therefore, the coil support shaft diameter of the coil winding of the direct-acting magnetic latching relay in the prior art is large. Since the coil winding is arranged along the movement direction of the push rod, the armature also moves along the movement direction of the push rod between the yoke plate and the static iron core. 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 magnetic latching relay. If the safety distance between the moving contact group and the static contact group needs to be increased, the length of the direct-acting magnetic latching relay in the prior art, which is already very long, needs to be increased. In addition, when the safety distance between the moving contact group and the static contact group needs to be increased, the pushing force of the magnetic circuit part needs to be increased, thereby the number of turns of the coil winding and the volume of the permanent magnet need to be increased, resulting in further increase in the volume. At the same time, since the relative sliding between the armature and the permanent magnet in the direct-acting magnetic latching relay in the prior art forms an air gap, the magnetic efficiency is low, and the required pushing force is larger. Therefore, the direct-acting magnetic latching relay in the prior art is also difficult to meet the demand of increasing the safety distance between the moving contact group and the static contact group in a limited space. SUMMARY

[0008] The present application aims to overcome the above-mentioned defects or problems in the background art, and provide a magnetic circuit part, a magnetic latching relay and an electric meter, 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.

[0009] According to various embodiments of the present application, a magnetic circuit part is provided, comprising:

[0010] a coil assembly provided with two magnetic driving ends arranged along the Y-axis direction;

[0011] The armature assembly comprises a permanent magnet and two armatures, two magnetic poles of the permanent magnet are arranged along the Z-axis direction, the two armatures are fixedly connected with the two magnetic poles of the permanent magnet respectively and correspond to one polarity respectively, the two armatures are each provided with two attraction portions arranged along the X-axis direction, each attraction portion can attract the corresponding magnetic driving end along 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 the different attraction portions of the two armatures in the X-axis direction and drive the armature assembly to move along the X-axis direction.

[0012] According to some embodiments of the present application, each armature is provided with a fixed connection portion fixedly connected with the magnetic pole of the permanent magnet, and the two attraction portions extend from the fixed connection portion along the Z-axis direction.

[0013] According to some embodiments of the present application, the top end of each attraction portion along the extension direction of the attraction portion forms an attraction portion avoiding structure, and the fixed connection portion of each armature corresponds to the attraction portion avoiding structure of the two attraction portions of the other armature to form a fixed connection portion avoiding structure; through the attraction portion avoiding structure and the corresponding fixed connection portion avoiding structure, the top end of each attraction portion of each armature and the fixed connection portion of the other armature are spaced apart along the X-axis direction and the Y-axis direction.

[0014] According to some embodiments of the present application, the fixed connection portion avoiding structure is a fixed connection portion corner, and the attraction portion avoiding structure is an attraction portion corner.

[0015] According to some embodiments of the present application, the fixed connection portion corner is formed by arranging a slope parallel to the Z-axis direction on the fixed connection portion, and the attraction portion corner is formed by arranging a slope parallel to the X-axis direction on the attraction portion.

[0016] According to some embodiments of the present application, the top end of the attraction portion of each armature along the extension direction of the attraction portion is flush with or exceeds the surface where the fixed connection portion of the other armature is fixedly connected with the magnetic pole of the permanent magnet.

[0017] According to some embodiments of the present application, each armature is formed by bending a plate or a sheet.

[0018] According to some embodiments of the present application, the size of the intersection of the attraction portion and the fixed connection portion along the Y-axis direction is a first size, the size of the fixed connection portion fixedly connected with the magnetic pole of the permanent magnet along the X-axis direction is a second size, and the ratio of the first size to the second size is between 0.6 and 1.4.

[0019] According to some embodiments of the present application, the number of the permanent magnets is at least two, and the polarity directions of the magnetic poles of each permanent magnet are the same.

[0020] According to some embodiments of the present application, the number of permanent magnets is one.

[0021] According to some embodiments of the present application, the projection of the armature assembly on the first projection plane is mirror symmetrical relative to a symmetry plane perpendicular to the Y-axis direction.

[0022] According to some embodiments of the present application, the two armatures are a first armature and a second armature, the two attracting portions of the first armature are a first attracting portion and a second attracting portion, and the two attracting portions of the second armature are a third attracting portion and a fourth attracting portion; the armature assembly moves along the X-axis direction between a first position and a second position; in the first position, the first attracting portion and the third attracting portion attract the two magnetic driving ends respectively; in the second position, the fourth attracting portion and the second attracting portion attract the two magnetic driving ends respectively.

[0023] According to some embodiments of the present application, the first attracting portion and the third attracting portion are arranged along the Y-axis direction, the fourth attracting portion and the second attracting portion are arranged along the Y-axis direction, the first attracting portion and the fourth attracting portion are arranged along the X-axis direction, and the third attracting portion and the second attracting portion are arranged along the X-axis direction.

[0024] According to some embodiments of the present application, the coil assembly includes a coil winding, a core, and two yokes; the axis of the coil winding extends along the Y-axis direction; the core is disposed in the coil winding along the Y-axis direction, and one end of each of the two yokes is fixedly connected to the core, and the other end forms the magnetic driving end.

[0025] According to various embodiments of the present application, a magnetic latching relay is provided, which includes a static contact group, a movable contact part, and a magnetic circuit part as described above; the static contact group includes two static contacts; the movable contact part includes a movable contact group, which is driven by the armature assembly to close or open along the X-axis direction with the static contact group to turn on or off the electrical connection between the two static contacts.

[0026] According to some embodiments of the present application, a housing is further included; one of the housing and the movable contact part is provided with a sliding groove, and the other is provided with a guide part;

[0027] The sliding groove extends along the X-axis direction, and the guide part extends into the sliding groove along the Z-axis direction to slide along the X-axis direction with the sliding groove.

[0028] According to some embodiments of the present application, the movable contact group comprises a movable contact, the movable contact is provided with an overcurrent bridge and movable contact points, the movable contact points are arranged at both ends of the overcurrent bridge along the Y-axis direction, the movable contact points can abut against the corresponding stationary contact along a closing direction, and the movable contact points can move away from the corresponding stationary contact along an opening direction, the closing direction and the opening direction are both along the X-axis direction; the guide portion is centrally located between the two movable contact points of the movable contact along the Y-axis direction.

[0029] According to some embodiments of the present application, the movable contact portion further comprises a pushing member, an elastic support group and a limiting member; the pushing member is fixedly connected with the armature assembly, the pushing member moves along the X-axis direction to drive the movable contact group to close or open with the stationary contact group along the X-axis direction; the elastic support group is arranged between the pushing member and the movable contact group along the X-axis direction; the limiting member is fixed relative to the pushing member and abuts against the movable contact group along the opening direction when the movable contact group is opened with the stationary contact group; the guide portion comprises a first guide portion, and the first guide portion is arranged on the limiting member.

[0030] According to some embodiments of the present application, the pushing member is integrally formed with the armature assembly by insert injection molding.

[0031] According to some embodiments of the present application, the limiting member is further provided with a limiting body fixedly connected with the first guide portion, the limiting body is provided with a limiting portion and two connecting portions, the limiting portion and the two connecting portions are an integral structure, the limiting portion can abut against the overcurrent bridge, and the two connecting portions respectively extend from both ends of the limiting portion along the Z-axis direction along the opening direction and are connected with the pushing member.

[0032] According to some embodiments of the present application, the number of the first guide portions is two, and the number of the sliding grooves is two; the two first guide portions extend into the corresponding sliding grooves from the limiting body along the Z-axis direction away from each other, and the two first guide portions are arranged along the Z-axis direction.

[0033] According to some embodiments of the present application, the first guide portion is located at the front portion of the limiting body along the closing direction.

[0034] According to some embodiments of the present application, a projection of the first guide portion on a first projection plane perpendicular to the Z-axis direction is circular; and / or,

[0035] The material of the first guide portion is plastic, the material of the limiting body is metal, the first guide portion and the limiting body are integrally formed by insert injection molding or are bonded or threadedly connected.

[0036] According to some embodiments of the present application, the guide portion further comprises a second guide portion; the second guide portion is arranged on the pushing member.

[0037] According to some embodiments of the present application, the pushing member further comprises a pushing body, the number of the second guide portions is two, the two second guide portions extend into the corresponding chute along the Z-axis direction away from each other from the pushing body, and the two second guide portions are arranged along the Z-axis direction.

[0038] According to some embodiments of the present application, the projection of the second guide portion on a first projection plane perpendicular to the Z-axis direction is circular.

[0039] According to some embodiments of the present application, each chute is divided into a first slot segment capable of slidingly cooperating with the first guide portion and a second slot segment capable of slidingly cooperating with the second guide portion; the first slot segment and the second slot segment are connected or separated along the X-axis direction.

[0040] According to various embodiments of the present application, an electric meter is provided, comprising the above-mentioned magnetic latching relay.

[0041] Compared with the prior art, the above-mentioned scheme has the following beneficial effects:

[0042] Compared with the swing type magnetic latching relay in the prior art, since the armature assembly moves linearly relative to the coil assembly, there is no loss of the radial component of the swing stroke of the swing type magnetic latching relay. Therefore, the space utilization rate of the relay can be higher, which can create more favorable conditions for increasing the safety distance between the moving contact set and the static contact set in a limited space.

[0043] Compared with the direct-acting type magnetic latching relay in the prior art, since the two magnetic driving ends are arranged along the Y-axis direction, the axis of the coil winding can also be arranged to extend along the Y-axis direction, and the linear motion direction of the armature assembly is the X-axis direction perpendicular to the Y-axis direction. This layout is conducive to leaving space for the movement of the armature assembly and the moving contact set along the X-axis direction. At this time, the dimension of the accommodating member along the Y-axis direction is mainly determined by the length of the coil assembly along the Y-axis direction. Therefore, the relay in the present application does not need to be very long in one direction (whether the X-axis direction or the Y-axis direction), which can make the relay more easily adapt to limited space, and can create more favorable conditions for increasing the safety distance between the moving contact set and the static contact set in a limited space.

[0044] Compared with the direct-acting magnetic latching relay in the prior art, since the push rod and the moving iron core do not need to be arranged in the coil winding, the support shaft diameter of the coil holder is smaller, and the inner diameter of the coil winding is smaller, so 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, the pushing force on the armature assembly is larger, and more favorable conditions can be created for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0045] In the present application, the two attracting portions of the armature assembly can form a first part of the magnetic circuit without any air gap through the permanent magnet and the two armatures, and the two magnetic driving ends of the coil assembly can also form a second part of the magnetic circuit through the entire coil assembly. In the magnetic holding state, the attracting portion attracts the corresponding magnetic driving end along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without air gap, so the magnetic loss is smaller, the magnetic efficiency is higher, and the movement stroke of the moving contact group can be increased without increasing the power consumption of the coil assembly; and in the case of equivalent magnetic driving force, the power consumption required for the coil assembly to realize magnetic driving can be reduced, and the size of the coil assembly can be made smaller. Therefore, 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.

[0046] In the magnetic holding state of the direct-acting magnetic latching relay in the prior art, two magnetic circuits opposing each other are often formed, one of which passes through the yoke plate, and the other of which passes through the static iron core, the magnetic action force directions of the two magnetic circuits on the moving iron core are opposite, and the second part passes through the entire coil assembly, so there is no above-mentioned problem, and compared with the direct-acting magnetic latching relay in the prior art, the magnetic action force in the magnetic holding state is larger, especially when the relay is subjected to a fault large current impact, the armature assembly is less likely to move out of the magnetic holding state, which is conducive to avoiding destructive arcing caused by the moving contact group moving away from the static contact group due to the fault large current.

[0047] In the present application, the magnetic poles of the permanent magnet are arranged along the Z-axis direction, and the two armatures are respectively fixed to the two magnetic poles of the permanent magnet and correspond to one polarity respectively, and each armature is provided with two attracting portions arranged along the X-axis direction, each attracting portion being adapted to attract the corresponding magnetic driving end along the X-axis direction; so that the armature assembly can realize balance of the magnetic field strength on both sides along the Y-axis direction even if there is only one permanent magnet.

[0048] In the present application, the two suction parts extend from the fixed part along the Z-axis direction, and through the spatial layout of the entire armature assembly, the suction parts extending along the Z-axis direction are attracted along the X-axis direction with the magnetic drive end, so that the space along the Z-axis direction is fully utilized, and the size of the armature assembly along the X-axis direction and the size along the Y-axis direction can be controlled, so that 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. Here, "the suction parts extend from the fixed part along the Z-axis direction" means that the suction parts as a whole extend from the edge of the fixed part along the Z-axis direction. Therefore, the sudden change of the magnetic conduction cross section caused by the perpendicular extension direction of the fixed part and the suction part can be avoided.

[0049] In the present application, each suction part and the fixed part of the other armature form a spacing along the X-axis direction and a spacing along the Y-axis direction through the suction part avoiding structure and the fixed part avoiding structure. Compared with only avoiding structure in the suction part and not in the fixed part, the size of the suction part along its extension direction can be avoided to be too small, which will reduce the suction area with the magnetic drive end, and the reduced suction area will reduce the suction force of the end of the suction part away from the fixed part of the same armature, and further cause the armature assembly to form a rotation force perpendicular to the X-axis direction relative to the coil assembly, and the magnetic attraction effect is not reliable.

[0050] In the present application, each suction part and the fixed part of the other armature form a spacing along the X-axis direction and a spacing along the Y-axis direction through the suction part avoiding structure and the fixed part avoiding structure. Compared with only avoiding structure in the fixed part and not in the suction part, the length of one of the fixed part and the suction part along the Y-axis direction can be avoided to be reduced, and further avoid the volume of the permanent magnet to be large, which will cause the magnetic attraction force and the magnetic holding force to be weak, and avoid the position where the fixed part and the suction part meet along the Y-axis direction to be reduced in size, which will cause the magnetic conduction cross section to be small, and the magnetic conduction cross section will cause the magnetic resistance to increase, the magnetic conduction efficiency to decrease, the response speed of the armature assembly to slow down and weaken the magnetic attraction force and the magnetic holding force.

[0051] 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 problem 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 this application, 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 larger without being limited to the spacing between the two suction parts arranged along the Y-axis direction. , the length of the two attracting parts extending along the Z-axis direction can also be set to be longer, and the length of the intersection of the attracting 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 setting of a permanent magnet with a larger volume, thereby improving the magnetic efficiency and the magnetic holding force that can be obtained; the length of the two attracting parts extending along the Z-axis direction is set to be longer, so that the area of ​​the attracting part used to attract the magnetic drive end is larger, the magnetic attraction force is greater, and the magnetic attraction stability is also higher; the length of the intersection of the attracting part and the fixed part along the Y-axis direction is set to be larger, which is conducive to uniform change of the magnetic conductive area, reducing magnetic resistance, and improving magnetic conductive efficiency and magnetic attraction.

[0052] In the present application, the fixed part and the suction part are formed with an inclined surface, and then the fixed part avoidance structure and the suction part avoidance structure are formed accordingly, so that the transition of the magnetic conductive cross section of the fixed part and the suction part is uniform, which can reduce magnetic leakage, ensure magnetic efficiency, and keep the suction surface of the suction part at a larger size, and make the volume of the permanent magnet part larger, so that the magnetic conductive efficiency is higher, and the magnetic attraction and magnetic holding force are greater.

[0053] In the present application, 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 flush with or exceed the surface of the fixed part of the other armature and the magnetic pole of the permanent magnet along its extension direction, thereby ensuring the suction area of ​​the suction part and the magnetic drive end, and avoiding or reducing the rotational force of the armature assembly.

[0054] In the present application, both armatures are formed by bending plates or sheets, which can reduce manufacturing difficulty and cost, and have material consistency, avoiding changes in the magnetic cross-section due to material splicing.

[0055] In this application, 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 key positions, avoiding the reduction of the magnetic conductivity cross-section and the reduction of magnetic efficiency due to inconsistent extension directions of the attraction part and the fixed part and a large difference between the first dimension and the second dimension.

[0056] In the application, compared with the two magnetic poles of the permanent magnet arranged along the X-axis direction, the two armatures intersect 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 part along the Y-axis direction. The technical solution can complete the magnetization once, thereby avoiding the magnetization error caused by twice magnetization or the problem of poor consistency of the magnetic parameters of each permanent magnet. This is because if the permanent magnets located on both sides of the intersecting part along the Y-axis direction are formed by magnetizing the magnetic steel, the magnetic poles of the permanent magnets on both sides are opposite along the X-axis direction, and therefore twice magnetization is required to complete the magnetization. This can cause at least two problems. The first problem is the risk of incorrect magnetization direction of the magnetic steel, and the second problem is that if the two magnetic steels are close along the Y-axis direction, the magnetic steel can be demagnetized during the second magnetization, thereby causing poor consistency of the magnetic parameters of the permanent magnets on both sides. In the application, the magnetic poles of the permanent magnets are arranged along the Z-axis direction, so that the polarity directions of the magnetic poles of each permanent magnet are the same along the Z-axis direction. Therefore, the magnetization can be completed once, thereby solving the above two problems well, and being beneficial to ensuring that the magnetic field strengths of the attraction parts on both sides of the armature assembly along the Y-axis direction are consistent, and also being beneficial to ensuring that the two armatures have a large contact area with the permanent magnet, thereby improving the magnetic cross section and the magnetic efficiency.

[0057] In the application, the number of permanent magnets is only one, and therefore the structure is simple, the cost of the armature assembly is reduced, and the problems caused by twice magnetization do not exist. In addition, the application is also beneficial to increasing the sizes of the permanent magnets along the Y-axis direction, the X-axis direction and the Z-axis direction, thereby making the magnetic holding force of the armature assembly larger, the magnetic driving force of the magnetic driving end on the armature assembly larger, and being more conducive to increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0058] In the application, the projection of the armature assembly on the first projection plane is mirror-symmetrical along the symmetry plane perpendicular to the Y-axis, thereby making the consistency of the magnetic field strengths on both sides of the armature assembly along the Y-axis direction better, and the center of gravity easier to be kept on the symmetry plane. The linear motion of the armature assembly is less likely to be skewed, the relay is less likely to jam and has a longer service life, the magnetic driving force is less likely to be wasted on useless work, and it is more conducive to increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0059] In the application, when the coil assembly is excited by the pulse electric signal to reverse the polarity of the two magnetic driving ends temporarily, not only the two magnetic driving ends generate magnetic repulsion on the first and third attraction parts, but also the first part of the push magnetic circuit without air gap is formed between the fourth and second attraction parts through the armature assembly, the second part of the push magnetic circuit is formed through the coil assembly, and the first and second parts of the push magnetic circuit constitute a complete push magnetic circuit, which has only a certain stroke air gap and no other air gap, so that the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends on the armature assembly is stronger under the same power consumption, which is more conducive to increasing the safety distance between the moving contact group and the static contact group. Similarly, when the coil assembly is excited by the pulse electric signal to reverse the polarity of the two magnetic driving ends temporarily, the same technical effects are also achieved.

[0060] In the application, the first and fourth attraction parts are arranged along the X-axis direction, the third and second attraction parts are arranged along the X-axis direction, the first and third attraction parts are arranged along the Y-axis direction, and the fourth and second attraction parts are arranged along the Y-axis direction, so that the four attraction parts of the armature assembly are respectively located at the four vertex positions of the rectangle in the first projection plane, which is convenient for adjusting the size of the armature assembly along the X-axis and Y-axis directions, and creates more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0061] In the application, the axis of the coil winding extends along the Y-axis direction, and the two magnetic driving ends are arranged along the Y-axis direction, and the linear motion direction of the armature assembly is the X-axis direction perpendicular to the Y-axis direction. Such layout is conducive to leaving space for the movement of the armature assembly and the moving contact group along the X-axis direction, so that the relay does not need a long length in one direction (whether the X-axis direction or the Y-axis direction), and the relay can be more easily adapted to limited space, thereby creating more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0062] In the application, the moving contact group is closed or disconnected with the static contact group along the X-axis direction to correspondingly turn on or turn off 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 of the moving contact and the corresponding static contact along the X-axis direction, so that the relay has higher safety and stronger load capacity, and is more conducive to improving the safety distance between the moving contact group and the static contact group.

[0063] The details of one or more embodiments of the application are presented in the following drawings and description. Other features, objects, and advantages of the application will become apparent from the specification, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0064] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by the disclosed drawings without creative labor for those skilled in the art.

[0065] Fig. 1 is a perspective exploded view of a relay in Embodiment 1;

[0066] Fig. 2 is a top view of a housing in Embodiment 1;

[0067] Fig. 3 is a perspective view of a cover in Embodiment 1;

[0068] Fig. 4 is a perspective view of a static contact set in Embodiment 1;

[0069] Fig. 5 is a perspective view of a static flux guide in Embodiment 1;

[0070] Fig. 6 is a top view of the static flux guide in Embodiment 1;

[0071] Fig. 7 is a front view of a magnetic circuit portion in Embodiment 1;

[0072] Fig. 8 is a top view of a coil assembly in Embodiment 1;

[0073] Fig. 9 is a top view of an armature assembly in Embodiment 1;

[0074] Fig. 10 is a right view of the armature assembly in Embodiment 1;

[0075] Fig. 11 is a perspective view of a shield in Embodiment 1;

[0076] Fig. 12 is a state diagram of the magnetic circuit portion when the armature assembly is in a magnetic holding state at a first position in Embodiment 1;

[0077] Fig. 13 is a state diagram of the magnetic circuit portion when the coil winding receives a first pulse electric signal in Embodiment 1;

[0078] Fig. 14 is a state diagram of the magnetic circuit portion when the armature assembly moves to a second position in Embodiment 1;

[0079] Fig. 15 is a state diagram of the magnetic circuit portion when the armature assembly is in a magnetic holding state at the second position in Embodiment 1;

[0080] Fig. 16 is a state diagram of the magnetic circuit portion when the coil winding receives a second pulse electric signal in Embodiment 1;

[0081] FIG17 is a schematic diagram of the state of the magnetic circuit portion when the armature assembly moves to the first position in Example 1;

[0082] FIG18 is a top view of the moving contact portion in Example 1;

[0083] FIG19 is a front view of the pusher in the first embodiment;

[0084] FIG20 is an exploded perspective view of some components of the moving contact portion in Example 1;

[0085] Figure 21 is a right side view of the limiting member in Example 1;

[0086] FIG22 is a cross-sectional view taken along line AA of FIG21 ;

[0087] FIG23 is a schematic diagram of the internal structure of the relay in the off state in Example 1;

[0088] FIG24 is a schematic diagram of the internal structure of the relay in the first embodiment when it is in the on state;

[0089] Figure 25 is a right side view of the relay in Example 1;

[0090] FIG26 is a cross-sectional view taken along line BB of FIG25 ;

[0091] FIG27 is a top view of the magnetic circuit portion of Example 2;

[0092] FIG28 is a perspective view of the armature assembly in Example 2;

[0093] FIG29 is an exploded perspective view of the armature assembly in Example 2;

[0094] Figure 30 is a left side view of the armature assembly in Example 2;

[0095] FIG31 is a three-dimensional diagram of the relay in the second embodiment.

[0096] Main figure mark explanation: 1, relay; 2, fixed part; 3, magnetic circuit part; 4, moving contact part; 5, microswitch; 6, accommodating piece; 7, static contact piece group; 8, static magnetic conductor; 9, blocking piece; 10, shell; 11, cover; 12, accommodating cavity; 13, sliding groove; 14, first groove section; 15, second groove section; 16, static magnetic conductor groove; 17, blocking piece groove; 18, abutting face; 19, static contact piece; 20, static contact point; 21, connecting terminal; 22, first static contact piece; 23, second static contact piece; 24, first overcurrent part; 25, first static contact point; 26, second overcurrent part; 27, third overcurrent part; 28, fourth overcurrent part; 29, fifth overcurrent part; 30, sixth overcurrent part; 27a, measurement terminal; 31, first connecting terminal; 32, seventh overcurrent part; 33, second static contact point; 34, eighth overcurrent part; 35, ninth overcurrent part; 36, second connecting terminal; 37, coil assembly; 38, armature assembly; 39, shielding cover; 40, coil holder; 41, coil winding; 42, signal input terminal; 43, iron core; 44, yoke; 45, magnetic driving end; 46, first yoke; 47, second yoke; 48, first magnetic driving end; 49, second magnetic driving end; 50, permanent magnet; 51, armature; 52, first permanent magnet; 53, second permanent magnet; 54, magnetic pole; 55, first magnetic pole; 56, second magnetic pole; 57, first armature; 58, second armature; 59, mutually intersecting part; 60, attraction part; 61, first attraction part; 62, second attraction part; 63, third attraction part; 64, fourth attraction part; 65, first shielding piece; 66, second shielding piece; 67, partition wall; 68, connecting wall; 69, recess; 70, pushing piece; 71, connecting piece; 72, moving contact piece group; 73, moving magnetic conductor group; 74, elastic support group; 75, elastic piece; 76, limiting piece; 77, pushing body; 78, second guide part; 79, accommodating part; 80, first embedding part; 81, second embedding part; 82, connecting column; 83, moving spring; 84, connecting end; 85, moving contact piece; 86, overcurrent bridge; 87, moving contact point; 88, first moving contact point; 89, second moving contact point; 90, moving magnetic conductor; 91, magnetic conductor body; 92, extension part; 93, elastic support; 94, frame body; 95, first elastic part; 96, first connecting hole; 97, first elastic arm; 98, main body; 99, second elastic part; 100, second connecting hole; 101, second elastic arm; 102, limiting body; 103, first guide part; 104, limiting part; 105, connecting part; 106, avoiding hole; 107, assembly hole; 108, bending part; 109, guide part; 110, static contact terminal; 111, fixed connection part; 112, first fixed connection part; 113, second fixed connection part; 114, fixed connection part avoiding structure; 115, attraction part avoiding structure; 116, first fixed connection part avoiding structure; 117, second fixed connection part avoiding structure; 118, third fixed connection part avoiding structure;119, fourth fixed connection part avoiding structure; 120, first suction part avoiding structure; 121, second suction part avoiding structure; 122, third suction part avoiding structure; 123, fourth suction part avoiding structure; F1, first magnetic force; M1, short-circuit-resistant magnetic circuit; M2, counter-flow magnetic field; S1, first surface; S2, second surface; W, interval; X1, closing direction; X2, opening direction. DETAILED DESCRIPTION

[0097] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0098] In the claims and the specification, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the features with one of the above directions are perpendicular to the features with another direction, and do not require that they must be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" introduced in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction.

[0099] In the claims and the specification, unless otherwise defined, the terms "first", "second" or "third" and the like are used only to distinguish different objects, and are not used to describe a particular order.

[0100] In the claims and the specification, unless otherwise defined, the terms "fixedly connected", "fixedly connected" or "relatively fixed" should be understood broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0101] In the claims and the specification, unless otherwise defined, the terms "include", "have" and their variants mean "include but are not limited to".

[0102] In the claims and the specification, unless otherwise defined, the term "provided with" means that the technical feature located after it is part of the technical feature located before it.

[0103] In the claims and the specification, unless otherwise defined, the term "group" means a set, which can include one element or a plurality of elements, for example, the "moving contact group" can include one moving contact or more than two moving contacts.

[0104] In the claims and specification, unless otherwise defined, the term "temporarily formed" means the polarity of the magnetic drive end formed by the pulsed electrical signal disappears with the disappearance of the pulsed electrical signal.

[0105] In the claims and specification, unless otherwise defined, the term "reversal" means the polarity of the magnetic drive end temporarily formed this time is opposite to the polarity of the magnetic drive end temporarily formed last time when the coil winding this time receives a pulsed electrical signal with a current direction different from the last time. Of course, those skilled in the art should understand that for a latching relay, if the coil assembly this time receives a pulsed electrical signal with a current direction same as the last time, the pulsed electrical signal this time is meaningless for control, and the state of the relay will not change.

[0106] In the claims and specification, unless otherwise defined, the term "back surface" means the surface facing away from the stationary contact assembly.

[0107] In the claims and specification, unless otherwise defined, the term "mounted" means connected directly or indirectly to each other.

[0108] Embodiment One

[0109] Referring to FIG. 1, FIG. 1 shows the structure of the relay 1 in this embodiment. The relay 1 is used to receive an electrical signal to control the on-off of an external circuit. The relay 1 in this embodiment is a latching relay, which is used to receive a pulsed electrical signal to control the on-off of an external circuit. In this embodiment, the pulsed electrical signal can be divided into a first pulsed electrical signal and a second pulsed electrical signal. The first pulsed electrical signal is used to control the external circuit to turn on correspondingly, and the second pulsed electrical signal is used to control the external circuit to turn off correspondingly. After receiving the first pulsed electrical signal, the relay 1 switches from the off state to the on state, and after the first pulsed electrical signal disappears, the relay 1 remains in the on state until the second pulsed electrical signal is received; after receiving the second pulsed electrical signal, the relay 1 switches from the on state to the off state, and after the second pulsed electrical signal disappears, the relay 1 remains in the off state until the first pulsed electrical signal is received. In this embodiment, the external circuit is a single-phase alternating current circuit. The relay 1 needs to control the on-off of the single-phase alternating current circuit.

[0110] Referring to FIG. 1, FIG. 1 shows the structure of the relay 1 in this embodiment. As shown in FIG. 1, the relay 1 includes a fixed part 2, a magnetic circuit part 3, a movable contact part 4, and a micro switch 5. The fixed part 2 is fixed relative to each other and can serve as a movement reference for the movable contact part 4. The magnetic circuit part 3 is used to receive a pulsed electrical signal and drive the movable contact part 4 to move based on the pulsed electrical signal. The movable 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-off of an external circuit. The micro switch 5 is used to send a relay state signal to an external relay state sensing circuit.

[0111] As shown in FIG. 1, the fixed part 2 comprises a housing 6, a static contact group 7, a static magnetic conductor 8 and a barrier 9.

[0112] As shown in FIG. 1, the housing 6 is made of plastic and comprises a shell 10 and a cover 11.

[0113] Referring to FIG. 2, the shell 10 in the embodiment is shown. As shown in FIG. 2, the shell 10 is provided with a cavity 12 which is open upward along the Z-axis direction and used for accommodating the static contact group 7, the static magnetic conductor 8, the barrier 9, the magnetic circuit part 3, the movable contact part 4 and the micro switch 5. The bottom wall of the shell 10 is provided with a sliding groove 13 at the middle part along the Y-axis direction, the sliding groove 13 extends along the X-axis direction and is divided into a first groove section 14 and a second groove section 15. The first groove section 14 is located in front of the second groove section 15. In the embodiment, the first groove section 14 and the second groove section 15 of the shell 10 are separated from each other along the X-axis direction, and in other embodiments, the first groove section 14 and the second groove section 15 of the shell 10 can be arranged to be connected to each other along the X-axis direction. The front of the first groove section 14 is provided with a static magnetic conductor groove 16. The left and right sides of the first groove section 14 along the Y-axis direction are respectively provided with a barrier groove 17. The rear of the two barrier grooves 17 is respectively provided with an abutting surface 18 which is arranged forward.

[0114] Referring to FIG. 3, the cover 11 in the embodiment is shown. As shown in FIG. 3, the cover 11 is fixedly connected with the shell 10 and used for shielding the cavity 12. The cover 11 is also provided with a sliding groove 13 which extends along the X-axis direction and is divided into a first groove section 14 and a second groove section 15. The first groove section 14 of the cover 11 is arranged corresponding to the first groove section 14 of the shell 10 along the Z-axis direction. The second groove section 15 of the cover 11 is arranged corresponding to the second groove section 15 of the shell 10 along the Z-axis direction. In the embodiment, the first groove section 14 and the second groove section 15 of the cover 11 are separated from each other along the X-axis direction, and in other embodiments, the first groove section 14 and the second groove section 15 of the cover 11 can be arranged to be connected to each other along the X-axis direction.

[0115] Referring to FIG. 4, FIG. 23 and FIG. 26, the static contact group 7 in the embodiment is shown. The static contact group 7 is used to electrically connect with external circuit. The static contact group 7 comprises two static contacts 19. Each static contact 19 is provided with a static contact point 20 and a connecting terminal 21. The connecting terminal 21 is used to connect external circuit. One of the two connecting terminals 21 is used to connect power supply, and the other is used to connect load. When the two static contacts 19 are turned on, the power supply and the load are turned on; when the two static contacts 19 are turned off, the power supply and the load are turned off. In the embodiment, the two static contacts 19 are respectively a first static contact 22 and a second static contact 23. The first static contact 22 is provided with a first overcurrent part 24, a first static contact point 25, a second overcurrent part 26, a third overcurrent part 27, a fourth overcurrent part 28, a fifth overcurrent part 29 and a sixth overcurrent part 30. The first overcurrent part 24 extends vertically along the X-axis direction and along the Z-axis direction. The first overcurrent part 24 is provided with a first surface S1 facing backward along the X-axis direction. The first static contact point 25 is the static contact point 20 of the first static contact 22. The number of the first static contact point 25 is two, and the two first static contact points 25 are arranged along the Z-axis direction. The two first static contact points 25 extend backward along the X-axis direction from the first surface S1 of the first overcurrent part 24. The second overcurrent part 26 extends forward along the X-axis direction from the right side of the first overcurrent part 24 along the Y-axis direction. The third overcurrent part 27 extends rightward along the Y-axis direction from the front end of the second overcurrent part 26 along the X-axis direction, as shown in FIG. 23, the third overcurrent part 27 penetrates the accommodating member 6 rightward along the Y-axis direction. As shown in FIG. 4, the lower part of the third overcurrent part 27 along the Z-axis direction is provided with a measuring terminal 27a extending downward along the Z-axis direction, as shown in FIG. 26, the measuring terminal 27a extends out of the accommodating member 6 downward along the Z-axis direction. As shown in FIG. 4, the fourth overcurrent part 28 extends backward along the X-axis direction from the right side of the third overcurrent part 27 along the Y-axis direction. The fifth overcurrent part 29 extends rightward along the Y-axis direction from the rear end of the fourth overcurrent part along the X-axis direction. The sixth overcurrent part 30 extends backward along the X-axis direction from the right side of the fifth overcurrent part 29 along the Y-axis direction and from the lower part of the sixth overcurrent part along the Z-axis direction. In the embodiment, the part of the third overcurrent part 27 extending out of the accommodating member 6, the fourth overcurrent part, the fifth overcurrent part and the sixth overcurrent part constitute a first connecting terminal 31. The first connecting terminal 31 is the connecting terminal 21 of the first static contact 22. The second static contact 23 is provided with a seventh overcurrent part 32, a second static contact point 33, an eighth overcurrent part 34 and a ninth overcurrent part 35. The seventh overcurrent part 32 is provided with a first surface S1 (not marked in FIG. 4) facing backward along the X-axis direction. The first surface S1 of the seventh overcurrent part 32 and the first surface S1 of the first overcurrent part 24 are located on the same plane perpendicular to the X-axis. The second static contact point 33 is the static contact point 20 of the second static contact 23. The number of the second static contact point 33 is two, and the two second static contact points 33 are arranged along the Z-axis direction. The two second static contact points 33 extend backward along the X-axis direction from the first surface S1 of the seventh overcurrent part 32. The eighth overcurrent part 34 extends backward along the X-axis direction from the right side of the seventh overcurrent part 32 along the Y-axis direction.The ninth flow portion 35 extends rightward along the Y-axis direction from the rear end of the eighth flow portion along the X-axis direction and from the lower part of the eighth flow portion along the Z-axis direction. As shown in FIG. 23, the ninth flow portion 35 extends rightward along the Y-axis direction out of the housing 6. In this embodiment, the ninth flow portion 35 constitutes a second connecting terminal 36. The second connecting terminal 36 is a connecting terminal 21 of the second static magnetic conductor 23. The second connecting terminal 36 can be used to install a mutual inductor. In this embodiment, two connecting terminals 21 are arranged along the X-axis direction and each extends out of the housing 6 along the Y-axis direction.

[0116] Referring to FIGS. 5 and 6, the static magnetic conductor 8 in this embodiment is shown. As shown in FIG. 5, the static magnetic conductor 8 extends along the Z-axis direction. As shown in FIG. 6, the surface of the static magnetic conductor 8 facing forward along the X-axis direction forms a second surface S2. The second surface S2 is perpendicular to the X-axis direction.

[0117] Referring to FIG. 1, the barrier 9 in this embodiment is shown. In this embodiment, the number of barriers 9 is two. Each barrier 9 is in the shape of a sheet and extends along the X-axis direction, and has a size along the Z-axis direction. Therefore, the two barriers 9 are both perpendicular to the Y-axis direction. The barrier 9 is made of a high-temperature-resistant insulating material. In this embodiment, a ceramic material is used.

[0118] Referring to FIG. 7, the magnetic circuit portion 3 in this embodiment is shown. As shown in FIG. 7, the magnetic circuit portion 3 includes a coil assembly 37, an armature assembly 38, and a shield 39.

[0119] Referring to FIGS. 7 and 8, the coil assembly 37 in the present embodiment is shown. As shown in FIGS. 7 and 8, the coil assembly 37 includes a coil frame 40, a coil winding 41, signal input terminals 42, a core 43, and yokes 44. The coil frame 40 is fixed to the housing 10. The coil frame 40 extends along the Y-axis direction and is provided with a central hole extending along the Y-axis direction. The coil frame 40 is provided with a baffle at each end along the Y-axis direction. The coil winding 41 is wound on the coil frame 40 and located between the two baffles. The axis of the coil winding 41 extends along the Y-axis direction. The two connection terminals of the coil winding 41 are connected to the three signal input terminals 42, which are used to receive pulse electrical signals. The core 43 is located in the central hole of the coil frame 40 and extends along the Y-axis direction. The number of the yokes 44 is two. The two yokes 44 are fixed to the two sides of the core 43 along the Y-axis direction, respectively, and the ends of the two yokes 44 away from the core 43 form magnetic driving ends 45, respectively. The two magnetic driving ends 45 are arranged along the Y-axis direction and extend close to each other along the Y-axis direction. The two yokes 44 are a first yoke 46 and a second yoke 47, respectively. The two magnetic driving ends 45 are a first magnetic driving end 48 and a second magnetic driving end 49, respectively. The first magnetic driving end 48 is formed on the first yoke 46, and the second magnetic driving end 49 is formed on the second yoke 47. The coil winding 41 is excited by the pulse electrical signals to reverse the polarity temporarily formed by the two magnetic driving ends 45, so as to switch the different attraction portions 60 of the two armatures 51 in the X-axis direction and drive the armature assembly 38 to move along the X-axis direction. In the present embodiment, for the convenience of introduction, it is assumed that when the signal input terminals 42 receive a first pulse electrical signal, the coil winding 41 generates a first magnetic field, and the first magnetic driving end 48 temporarily has N-pole polarity, and the second magnetic driving end 49 temporarily has S-pole polarity. After the first pulse electrical signal disappears, the first magnetic field of the coil winding 41 disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated based on the first magnetic field; when the signal input terminals 42 receive a second pulse electrical signal with the current direction opposite to that of the first pulse electrical signal, the coil winding 41 generates a second magnetic field, and the polarity of the first magnetic driving end 48 reverses to have S-pole polarity, and the polarity of the second magnetic driving end 49 reverses to have N-pole polarity. After the second pulse electrical signal disappears, the second magnetic field of the coil winding 41 disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated based on the second magnetic field. The "temporarily formed" in the present embodiment refers to the polarity of the magnetic driving end 45 formed by the pulse electrical signal disappearing with the disappearance of the pulse electrical signal. The "reversing" in the present embodiment refers to that when the coil winding 41 receives the pulse electrical signal this time and the current direction of the pulse electrical signal is different from that of the pulse electrical signal received last time, the polarity of the magnetic driving end 45 temporarily formed this time is opposite to that of the magnetic driving end 45 temporarily formed last time.

[0120] Referring to FIG. 9 and FIG. 10, the armature assembly 38 in the embodiment is shown. The armature assembly 38 is driven by the coil assembly 37 to move along the X-axis direction between a first position and a second position. When the armature assembly 38 moves to the first position, the relay 1 is in an off state, and the external circuit is turned off. When the armature assembly 38 moves to the second position, the relay 1 is in an on state, and the external circuit is turned on. The first position is further along the X-axis direction than the second position. As shown in FIG. 9 and FIG. 10, in the embodiment, the armature assembly 38 includes two permanent magnets 50 and two armatures 51. The two permanent magnets 50 are formed by magnetized magnetic steel, and in other embodiments, the two permanent magnets 50 can also use other permanent magnet materials, such as neodymium iron boron permanent magnets. In the embodiment, the two permanent magnets 50 are a first permanent magnet 52 and a second permanent magnet 53, respectively. Each permanent magnet 50 is provided with two magnetic poles 54 with fixed polarity, and the two magnetic poles 54 are a first magnetic pole 55 and a second magnetic pole 56, respectively. The first magnetic pole 55 and the second magnetic pole 56 have opposite polarities. For the convenience of introduction, it is assumed that the polarity of the first magnetic pole 55 is N-pole, and the polarity of the second magnetic pole 56 is S-pole. In the embodiment, the two magnetic poles 54 of each permanent magnet 50 are arranged along the X-axis direction. In the embodiment, the two permanent magnets 50 are arranged along the Y-axis direction. The first permanent magnet 52 is on the left 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 behind along the X-axis direction. The first magnetic pole 55 of the second permanent magnet 53 is behind along the X-axis direction, and the second magnetic pole 56 is in front along the X-axis direction. The two armatures 51 are a first armature 57 and a second armature 58, respectively. The first armature 57 is fixedly connected to the first magnetic poles 55 of the two permanent magnets 50. The second armature 58 is fixedly connected to the second magnetic poles 56 of the two permanent magnets 50. The projections of the two armatures 51 on a first projection plane perpendicular to the Z-axis direction intersect each other. The portions 59 where the two armatures 51 intersect each other form a spacing W along the Z-axis direction. Each armature 51 is provided with two attracting portions 60 on both sides along the Y-axis direction, and the two attracting portions 60 are arranged along the X-axis direction. The first armature 57 is provided with a first attracting portion 61 and a second attracting portion 62 on both sides along the Y-axis direction, the first attracting portion 61 is on the left along the Y-axis direction and in front along the X-axis direction, and the second attracting portion 62 is on the right along the Y-axis direction and behind along the X-axis direction. The second armature 58 is provided with a third attracting portion 63 and a fourth attracting portion 64 on both sides along the Y-axis direction, the third attracting portion 63 is on the right along the Y-axis direction and in front along the X-axis direction, and the fourth attracting portion 64 is on the left along the Y-axis direction and behind along the X-axis direction. Therefore, in the embodiment, the first attracting portion 61 and the third attracting portion 63 are arranged along the Y-axis direction, the fourth attracting portion 64 and the second attracting portion 62 are arranged along the Y-axis direction, the first attracting portion 61 and the fourth attracting portion 64 are arranged along the X-axis direction, and the third attracting portion 63 and the second attracting portion 62 are arranged along the X-axis direction.In 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.

[0121] Referring to FIG. 7 and FIG. 11, FIG. 7 and FIG. 11 show the shield 39 in this embodiment. As shown in FIG. 11, the shield 39 comprises a first shield 65 and a second shield 66. The first shield 65 and the second shield 66 are inserted and fitted to form the shield 39. The shield 39 is provided with two walls 67 and a connecting wall 68. Each wall 67 is provided with a groove 69 at the front end thereof along the X-axis direction, and the groove 69 extends along the X-axis direction and is located at the middle of the wall 67 along the Y-axis direction. As shown in FIG. 7, the two walls 67 are both perpendicular to the Z-axis direction. The two 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 walls 67. The connecting wall 68 is arranged behind the coil assembly 37 along the X-axis direction.

[0122] Referring to FIG. 12 to FIG. 17, FIG. 12 to FIG. 17 show the operation principle of the magnetic circuit part 3 in this embodiment.

[0123] As shown in FIG. 12, in this embodiment, the armature assembly 38 is located between the arms of the two yokes 44 extending along the X-axis direction along the Y-axis direction. The first magnetic driving end 48 is located between the first attraction part 61 and the fourth attraction part 64 along the X-axis direction; the second magnetic driving end 49 is located between the third attraction part 63 and the second attraction part 62 along the X-axis direction.

[0124] Fig. 12 shows the state of the magnetic circuit portion 3 when the armature assembly 38 is in the magnetic holding state at the first position in the present embodiment. As shown in Fig. 12, when the armature assembly 38 is in the magnetic holding state at the first position, the first attraction portion 61 attracts the first magnetic driving end 48, and the third attraction portion 63 attracts the second magnetic driving end 49. At this time, the magnetic circuit portion 3 forms two closed magnetic circuits, i.e., a first closed magnetic circuit and a second closed magnetic circuit. The first closed magnetic circuit passes from the first magnetic pole 55 of the first permanent magnet 52, through the first attraction portion 61, the first magnetic driving end 48, the first yoke 46, the iron core 43, the second yoke 47, the second magnetic driving end 49, the third attraction portion 63, the portion 59 where the first and second armatures 57, 58 cross each other, the second magnetic pole 56 of the first permanent magnet 52, back to the first magnetic pole 55 of the first permanent magnet 52, without any air gap in between, and through the entire coil assembly 37. The second closed magnetic circuit passes from the first magnetic pole 55 of the second permanent magnet 53, through the portion 59 where the first and second armatures 57, 58 cross each other, the first attraction portion 61, the first magnetic driving end 48, the first yoke 46, the iron core 43, the second yoke 47, the second magnetic driving end 49, the third attraction portion 63, the second magnetic pole 56 of the second permanent magnet 53, back to the first magnetic pole 55 of the second permanent magnet 53, without any air gap in between, and through the entire coil assembly 37. Therefore, when the armature assembly 38 is in the magnetic holding state at the first position, due to the existence of the first and second closed magnetic circuits and the superposition effect between them, a greater magnetic attraction force is generated between the first attraction portion 61 and the first magnetic driving end 48, and between the third attraction portion 63 and the second magnetic driving end 49, so that the armature assembly 38 is held at the first position relative to the coil assembly 37.

[0125] Fig. 13 shows the state of the magnetic circuit part 3 when the coil assembly 37 just receives the first pulse electric signal in the present embodiment. As shown in Fig. 13, at this time, the coil winding 41 is excited by the first pulse electric signal to generate the first magnetic field, so that the first magnetic driving end 48 temporarily has the N-pole polarity and the second magnetic driving end 49 temporarily has the S-pole polarity. Since the first magnetic driving end 48 and the first attraction part 61 have the same N-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the first attraction part 61. Since the second magnetic driving end 49 and the third attraction part 63 have the same S-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the third attraction part 63. In addition, the magnetic circuit part 3 at this time forms two push magnetic circuits, i.e. a first push magnetic circuit and a second push magnetic circuit. The first push magnetic circuit passes through the entire coil assembly 37 from the first magnetic driving end 48, through the stroke air gap, the fourth attraction part 64, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the portion 59 where the first armature 57 intersects with each other, the second attraction part 62, the stroke air gap, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, and returns to the first magnetic driving end 48, with only two stroke air gaps in the middle. The second push magnetic circuit also passes through the entire coil assembly 37 from the first magnetic driving end 48, through the stroke air gap, the fourth attraction part 64, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second attraction part 62, the stroke air gap, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, and returns to the first magnetic driving end 48, with only two stroke air gaps in the middle. Therefore, when the coil assembly 37 just receives the first pulse electric signal, not only the first magnetic driving end 48 generates the magnetic repulsion force to the first attraction part 61 and the second magnetic driving end 49 generates the magnetic repulsion force to the third attraction part 63, but also the first magnetic driving end 48 generates the magnetic attraction force to the fourth attraction part 64 and the second magnetic driving end 49 generates the magnetic attraction force to the second attraction part 62 due to the existence of the first push magnetic circuit and the second push magnetic circuit and the superposition effect between them, so that the coil assembly 37 can generate a stronger pushing force to the armature assembly 38 to push the armature assembly 38 to move from the first position to the second position along the closing direction X1.

[0126] Fig. 14 shows the state of the magnetic circuit part 3 when the armature assembly 38 is driven by the coil assembly 37 to move to the second position in the closing direction X1 in the present embodiment. As shown in Fig. 14, when the armature assembly 38 just moves to the second position, the first pulse electric signal and the first magnetic field have not disappeared yet, the first magnetic driving end 48 still temporarily has the N-pole polarity, and the second magnetic driving end 49 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 forms two closed magnetic circuits, i.e., a third closed magnetic circuit and a fourth closed magnetic circuit. The third closed magnetic circuit is from the first magnetic driving end 48, through the fourth attraction portion 64, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the portion 59 where the first armature 57 intersects with each other, the second attraction portion 62, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, back to the first magnetic driving end 48, without any air gap in the middle, and passes through the entire coil assembly 37. The fourth closed magnetic circuit is from the first magnetic driving end 48, through the fourth attraction portion 64, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second attraction portion 62, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, back to the first magnetic driving end 48, without any air gap in the middle, and passes through the entire coil assembly 37. Therefore, when the armature assembly 38 just moves to the second position, due to the existence of the third closed magnetic circuit and the fourth closed magnetic circuit and the superposition effect between the two, a greater magnetic attraction force is generated between the first magnetic driving end 48 and the fourth attraction portion 64 and between the second magnetic driving end 49 and the second attraction portion 62.

[0127] Fig. 15 shows the state of the magnetic circuit part 3 when the armature assembly 38 is in the magnetic holding state at the second position in the present embodiment. As shown in Fig. 15, when the first pulse electric signal disappears, the first magnetic field disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated by the first magnetic field. At this time, the third closed magnetic circuit and the fourth closed magnetic circuit described above still exist, wherein the third closed magnetic circuit can be regarded as starting from the first magnetic pole 55 of the first permanent magnet 52, and its path is the same as that of the third closed magnetic circuit shown in Fig. 14; the fourth closed magnetic circuit can be regarded as starting from the first magnetic pole 55 of the second permanent magnet 53, and its path is the same as that of the fourth closed magnetic circuit shown in Fig. 14. And the third closed magnetic circuit and the fourth closed magnetic circuit superimpose on each other, so that a greater magnetic attraction force is generated between the fourth attraction portion 64 and the first magnetic driving end 48 and between the second attraction portion 62 and the second magnetic driving end 49, and the armature assembly 38 is kept at the second position relative to the coil assembly 37.

[0128] Fig. 16 shows the state of the magnetic circuit part 3 when the coil assembly 37 just receives the second pulse electric signal in the present embodiment. As shown in Fig. 16, at this time, the coil winding 41 is excited by the second pulse electric signal to generate the second magnetic field, so that the first magnetic driving end 48 temporarily has the S-pole polarity and the second magnetic driving end 49 temporarily has the N-pole polarity. Since the first magnetic driving end 48 and the fourth attraction part 64 have the same S-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction part 64; since the second magnetic driving end 49 and the second attraction part 62 have the same N-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction part 62. In addition, the magnetic circuit part 3 at this time forms two push magnetic circuits, i.e. the third push magnetic circuit and the fourth push magnetic circuit. The third push magnetic circuit passes through the entire coil assembly 37 from the second magnetic driving end 49, through the stroke air gap, the third attraction part 63, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the first attraction part 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, and only has two stroke air gaps in the middle. The fourth push magnetic circuit also passes through the entire coil assembly 37 from the second magnetic driving end 49, through the stroke air gap, the third attraction part 63, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the portion 59 where the first armature 57 intersects with each other, the first attraction part 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, and only has two stroke air gaps in the middle. Therefore, when the coil assembly 37 just receives the second pulse electric signal, not only the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction part 64 and the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction part 62, but also due to the existence of the third push magnetic circuit and the fourth push magnetic circuit and the superposition effect between them, the first magnetic driving end 48 generates the magnetic attraction force to the first attraction part 61 and the second magnetic driving end 49 generates the magnetic attraction force to the third attraction part 63, so that the coil assembly 37 can form a stronger pushing force to the armature assembly 38 to push the armature assembly 38 to move from the second position to the first position along the breaking direction X2.

[0129] Fig. 17 shows the state of the magnetic circuit part 3 when the armature assembly 38 is driven by the coil assembly 37 to move in the breaking direction X2 to the first position in the present embodiment. As shown in Fig. 17, when the armature assembly 38 just moves to the first position, the second pulse electric signal and the second magnetic field have not disappeared yet, the first magnetic driving end 48 still temporarily has the S-pole polarity, and the second magnetic driving end 49 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 still has the first closed magnetic circuit and the second closed magnetic circuit shown in Fig. 12, wherein the first closed magnetic circuit can be regarded as starting from the second magnetic driving end 49 and having the same path as that of the first closed magnetic circuit shown in Fig. 12, and the second closed magnetic circuit can be regarded as starting from the second magnetic driving end 49 and having the same path as that of the second closed magnetic circuit shown in Fig. 12. Therefore, when the armature assembly 38 just moves to the first position, due to the existence of the first closed magnetic circuit and the second closed magnetic circuit and the superposition effect between them, a greater magnetic attraction force is generated between the first magnetic driving end 48 and the first attraction part 61 and between the second magnetic driving end 49 and the third attraction part 63.

[0130] When the second pulse electric signal disappears, the second magnetic field disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 38 is in the magnetic holding state at the first position as shown in Fig. 12.

[0131] Referring to Fig. 18, Fig. 18 shows the moving contact part 4 in the present embodiment. As shown in Fig. 18, the moving contact part 4 includes a pushing member 70, a connecting member 71, a moving contact member group 72, a moving magnetic conductor group 73, an elastic support member group 74, an elastic member 75, and a limiting member 76.

[0132] Referring to FIG. 19, FIG. 19 shows the pusher 70 and the connecting piece 71 in the present embodiment. As shown in FIG. 19, in the present embodiment, the armature assembly 38, the connecting piece 71 and the moving spring 83 are fixed to the pusher 70, and the armature assembly 38, the connecting piece 71 and the moving spring 83 are integrally formed with the pusher 70 by insert injection molding. The pusher 70 is made of plastic. The pusher 70 is provided with a pusher body 77 and two second guide portions 78. The pusher body 77 is provided with a receiving portion 79, a first insert portion 80 and a second insert portion 81. The receiving portion 79 is used for accommodating the armature assembly 38. The first insert portion 80 is used for accommodating the connecting piece 71 and is located in front of the receiving portion 79 along the X-axis direction. The front surface of the first insert portion 80 is provided with two connecting columns 82. The two connecting columns 82 are arranged along the Z-axis direction. Each connecting column 82 extends forward from the front surface of the first insert portion 80 along the X-axis direction. The second insert portion 81 is used for accommodating the moving spring 83 and is located behind the receiving portion 79 along the X-axis direction. The moving spring 83 is part of the micro switch 5, which will be described later. The two second guide portions 78 extend away from each other along the Z-axis direction from the pusher body 77. In the present embodiment, the two second guide portions 78 extend away from each other along the Z-axis direction from the upper surface and the lower surface of the receiving portion 79 along the Z-axis direction, respectively, and the second guide portions 78 are arranged at the middle part of the receiving portion 79 along the Y-axis direction and the middle part of the receiving portion 79 along the X-axis direction. The projection of each second guide portion 78 on a first projection plane perpendicular to the Z-axis direction is circular.

[0133] As shown in FIG. 19, the connecting piece 71 extends along the Z-axis direction, and the two ends thereof along the Z-axis direction respectively extend out of the first insert portion 80 to form two connecting ends 84.

[0134] Referring to FIG. 20, FIG. 20 shows the moving contact set 72, the moving magnet set 73, the elastic support set 74 and the elastic member 75 in the present embodiment. The moving contact set 72 is driven to close or open with the stationary contact set 7 along the X-axis direction by the armature assembly 38 and the pusher 70 integrally formed with the armature assembly 38 by insert injection molding, so as to correspondingly turn on or turn off the electrical connection between the two stationary contacts 19. As shown in FIG. 20, the moving contact set 72 includes two moving contacts 85. The two moving contacts 85 are arranged along the Z-axis direction. Each moving contact 85 is provided with an overcurrent bridge 86 and two moving contact points 87. The overcurrent bridge 86 extends along the Y-axis direction. The two moving contact points 87 are arranged along the Y-axis direction and fixed to the overcurrent bridge 86, and each moving contact point 87 is arranged along the X-axis direction towards the front and opposite to the corresponding stationary contact point 20. The moving contact point 87 opposite to the first stationary contact point 25 along the X-axis direction is the first moving contact point 88; the moving contact point 87 opposite to the second stationary contact point 33 along the X-axis direction is the second moving contact point 89. When the moving contact set 72 is closed with the stationary contact set 7, each first moving contact point 88 abuts against the corresponding first stationary contact point 25 along the X-axis direction, each second moving contact point 89 abuts against the corresponding second stationary contact point 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned on through the two moving contacts 85. When the moving contact set 72 is opened with the stationary contact set 7, each first moving contact point 88 is away from the corresponding first stationary contact point 25 along the X-axis direction, each second moving contact point 89 is away from the corresponding second stationary contact point 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned off.

[0135] The moving magnet set 73 is fixed opposite to the moving contact set 72 and arranged opposite to the stationary magnet 8 along the X-axis direction. As shown in FIG. 20, the moving magnet set 73 includes a moving magnet 90, which is arranged opposite to the moving contact 85. In the present embodiment, the number of the moving magnet 90 is two, and the two moving magnets 90 are arranged along the Z-axis direction. Each moving magnet 90 is provided with a magnet body 91 and two extension parts 92. The magnet body 91 extends along the Z-axis direction and is fixed to the back surface of the overcurrent bridge 86, where the “back surface” refers to the surface facing away from the stationary contact set 7. The extension part 92 extends forward along the X-axis direction from the two ends of the magnet body 91 along the Z-axis direction.

[0136] The elastic support set 74 is arranged on the pushing member 70 and is located between the pushing member 70 and the movable contact set 72 along the X-axis direction. As shown in FIG. 20, the elastic support set 74 includes elastic supports 93. In this embodiment, the number of the elastic supports 93 is two and the elastic supports 93 are arranged along the Z-axis direction. The elastic support 93 is provided with a support body 94 and a first elastic part 95. The support body 94 is fixed relative to the pushing member 70. The support body 94 is provided with two first connecting holes 96 corresponding to the connecting columns 82. The connecting columns 82 pass through the first connecting holes 96 so that the support body 94 is positioned along any direction perpendicular to the X-axis direction relative to the pushing member 70. The first elastic part 95 can be elastically deformed along the X-axis direction. The first elastic part 95 is arranged corresponding to the movable contact 85. The movable contact 85 is fixedly connected to the corresponding first elastic part 95. In this embodiment, each first elastic part 95 includes two first elastic arms 97. One end of the first elastic arm 97 is integrated with the support body 94. The other end of the first elastic arm 97 is fixedly connected to the overcurrent bridge 86. The position where the first elastic arm 97 is fixedly connected to the back of the overcurrent bridge 86 corresponds to the position of the movable contact 87.

[0137] The elastic member 75 can abut against the accommodating member 6. The elastic member 75 is deformed to store energy when the pushing member 70 moves along the disconnecting direction X2. The elastic member 75 restores the deformation to release energy when the pushing member 70 moves along the closing direction X1. As shown in FIG. 20, the elastic member 75 is provided with a main body 98 and a second elastic part 99. The main body 98 is in the shape of a sheet perpendicular to the X-axis direction and is fixed relative to the pushing member 70. The main body 98 is provided with two second connecting holes 100 corresponding to the connecting columns 82. The connecting columns 82 pass through the second connecting holes 100 so that the main body 98 is positioned along any direction perpendicular to the X-axis direction relative to the pushing member 70. The main body 98 is located between the support body 94 and the first insert part 80 along the X-axis direction. The second elastic part 99 can be elastically deformed along the X-axis direction. The second elastic part 99 is arranged corresponding to the movable contact 85 in the movable contact set 72. The second elastic part 99 includes two second elastic arms 101. One end of each second elastic arm 101 is integrated with the main body 98. The other end of each second elastic arm 101 extends to the two sides along the Y-axis direction and can abut against the corresponding abutting surface 18.

[0138] Referring to FIG. 21 and FIG. 22, the limit member 76 in the embodiment is shown. The limit member 76 is fixed relative to the push member 70 and abuts against the movable contact group 72 rearward when the movable contact group 72 is disconnected from the stationary contact group 7, so as to limit the distance between the movable contact group 72 and the stationary contact group 7. As shown in FIG. 21 and FIG. 22, the limit member 76 is provided with a limit body 102 and two first guide portions 103. The limit body 102 is made of metal. The limit body 102 is provided with a limit portion 104 and two connecting portions 105. The limit portion 104 is capable of abutting against each movable contact 85 in the movable contact group 72. The limit portion 104 extends along the Z-axis direction and is provided with three avoiding holes 106 for the extension portion 92 of each movable magnetic conductor 90 to extend forward along the X-axis direction. The two connecting portions 105 extend rearward along the Z-axis direction from the two ends of the limit portion 104, respectively. The connecting portion 105 is provided with a mounting hole 107 for cooperating and fixing with the connecting end 84 and a bent portion 108 for mounting the first guide portion 103. The bent portion 108 extends along the Z-axis direction from the front end of the connecting portion 105 along the closing direction X1. The extension directions of the bent portions 108 of the two connecting portions 105 are away from each other. The two first guide portions 103 are arranged along the Z-axis direction and located at the ends of the bent portions 108 along the Z-axis direction away from each other. The first guide portion 103 is made of plastic. The two first guide portions 103 are integrally formed with the limit body 102 by insert injection molding, and the first guide portion 103 wraps the corresponding bent portion 108. In the embodiment, the first guide portion 103 is located at the front end of the limit member 76 along the closing direction X1 along the X-axis direction and at the middle of the limit member 76 along the Y-axis direction. In the embodiment, the first guide portion 103 and the second guide portion 78 are both guide portions 109. The guide portion 109 is used for guiding the movement of the movable contact part 4 along the X-axis direction.

[0139] Referring to FIG. 1, the micro switch 5 in the embodiment is shown. As shown in FIG. 1, in the embodiment, the micro switch 5 includes the movable spring 83 and two stationary contact terminals 110. The stationary contact terminal 110 extends along the Z-axis direction and extends out of the accommodating member 6. The two stationary contact terminals 110 are arranged along the Y-axis direction and located between the movable spring 83 and the coil winding 41 along the X-axis direction. The two stationary contact terminals 110 are used for electrical connection with the relay state sensing circuit. The movable spring 83 is fixed with the push member 70. In the embodiment, the movable spring 83 is integrally formed with the push member 70 by insert injection molding and located in the second insert portion 81. The movable spring 83 is provided with two abutting arms extending away from each other along the Y-axis direction. The movable spring 83 is driven by the push member 70 to move along the X-axis direction, so that the abutting arms abut or move away from the two stationary contact terminals 110. In other embodiments, when the movable spring 83 is not fixed with the push member 70, the movable spring 83 can also move away from the two stationary contact terminals based on the elastic restoring force of the movable spring 83 itself.

[0140] Referring to FIG. 23 and FIG. 26, the internal structure of the relay 1 in the embodiment is shown.

[0141] As shown in FIG. 23, in the embodiment, the magnetic circuit part 3 and the movable contact part 4 are arranged in the accommodating cavity 12. The two static contacts 19 of the static contact group 7 are fixed to the accommodating member 6, so that the static contact points 20 of the two static contacts 19 are arranged along the Y-axis direction, and the connecting terminals 21 of the two static contacts 19 are arranged along the X-axis direction and protrude out of the accommodating member 6 along the Y-axis direction. The second connecting terminals 35 of the second static contacts 23 are located along the X-axis direction between the static contact points 20 and the coil winding 41. The eighth overcurrent part 34 is located along the Y-axis direction outside the movable contact group 72 and outside the right barrier 9. The static flux guide 8 is inserted into the static flux guide slot 16 and fixed to the accommodating member 6. The first static contact point 25 and the second static contact point 33 are located along the Y-axis direction on two sides of the static flux guide 8, respectively. The projection of the part of all the static contact points 20 capable of contacting the movable contact group 72 on the second projection plane perpendicular to the Y-axis direction is located within the projection of the static flux guide 8 on the second projection plane, and the surface of the static flux guide 8 facing the movable flux guide group 73 is closer to the movable flux guide group 73 along the X-axis direction than all the static contact points 20. The second surface S2 is closer to the movable flux guide group 73 than the first surface S1. The static flux guide 8 is oppositely arranged along the X-axis direction to the movable flux guide group 73. The static flux guide 8 is located along the X-axis direction between the third overcurrent part 27 and the movable flux guide group 73. In other embodiments, the static flux guide 8 can also be fixed relative to the limiting member 76 and can play the same role. The two barriers 9 are respectively inserted into the corresponding barrier slots 17 and fixed to the accommodating member 6, so that the two barriers 9 are located along the Y-axis direction outside the static contact group 7. The first magnetic driving end 48 is located along the X-axis direction between the first attraction part 61 and the fourth attraction part 64. The second magnetic driving end 49 is located along the X-axis direction between the third attraction part 63 and the second attraction part 62. Each first movable contact point 88 is oppositely arranged along the X-axis direction to the corresponding first static contact point 25, and each second movable contact point 89 is oppositely arranged along the X-axis direction to the corresponding second static contact point 33. The limiting member 76 is fixed to the connecting member 71 to be fixed relative to the pushing member 70. The limiting member 76 can abut against the movable contact group 72 along the disconnection direction X2. The elastic member 75 can abut against the accommodating member 6. The first guide part 103 and the second guide part 78 are both centrally located along the Y-axis direction between the first movable contact point 88 and the second movable contact point 89.

[0142] As shown in FIG. 26, the shell 10 and the cover 11 are fixed to form the accommodating member 6. The shielding cover 39 is placed in the accommodating member 6. The first guide part 103 located at the upper part along the Z-axis direction extends into the first slot section 14 of the slide groove 13 of the cover 11 along the Z-axis direction. The second guide part 78 located at the upper part along the Z-axis direction extends into the second slot section 15 of the slide groove 13 of the cover 11 along the Z-axis direction. The first guide part 103 located at the lower part along the Z-axis direction extends into the first slot section 14 of the slide groove 13 of the shell 10 along the Z-axis direction. The second guide part 78 located at the lower part along the Z-axis direction extends into the second slot section 15 of the slide groove 13 of the shell 10 along the Z-axis direction. Thus, each guide part 109 extends into the corresponding slide groove 13 along the Z-axis direction and is in sliding fit with the slide groove 13 along the X-axis direction. In the embodiment, the guide parts 109 are arranged on the movable contact part 4, and the slide grooves 13 are arranged on the accommodating member 6. In other embodiments, the guide parts 109 can be arranged on the accommodating member 6, and the slide grooves 13 can be arranged on the movable contact part 4.

[0143] Referring to FIG. 23, FIG. 23 shows the state of the relay 1 when the armature assembly 38 is located at the first position. As shown in FIG. 23, when the armature assembly 38 is located at the first position, the movable contact group 72 is disconnected from the stationary contact group 7 along the disconnecting direction X2, the relay 1 is in the off state, and the external circuit is disconnected. At this time, the elastic member 75 is in contact with the abutting surface 18 along the disconnecting direction X2, so that the elastic member 75 is deformed to store energy. The limiting member 76 abuts against the movable contact group 72 along the disconnecting direction X2, each movable contact 85 abuts against the elastic support group 74, and the support body 94 of the elastic support 93 and the main body 98 of the elastic member 75 are fixed relative to the push member 70 along the X-axis direction, so that the support body 94 and the elastic member 75 are fixed relative to the push member 70. The movable spring 83 abuts against the two stationary contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the off state.

[0144] When the coil assembly 37 drives the armature assembly 38 to move along the closing direction X1 after the coil winding 41 receives the first pulse electrical signal, the armature assembly 38 drives the movable contact part 4 to move along the closing direction X1. During the process, the guide part 109 slides in the slide groove 13 along the closing direction X1 and guides the movable contact part 4. The elastic member 75 restores the deformation to release the energy. When the movable contact 87 abuts against the corresponding stationary contact 20, the push member 70 enters the overstroke, at this time, the elastic support group 74 is deformed to store energy until the armature assembly 38 reaches the second position, and the movable contact group 72 is connected with the stationary contact group 7.

[0145] Referring to FIG. 24 and FIG. 26, FIG. 24 and FIG. 26 show the state of the relay 1 when the armature assembly 38 is in the second position. As shown in FIG. 24, when the armature assembly 38 is in the second position, the movable contact group 72 is closed with the stationary contact group 7 in the closing direction X1, the relay 1 is in the on state, and the external circuit is turned on. The third overcurrent portion 27 of the first stationary contact 22 forms a reverse current portion, and the overcurrent direction of the reverse current portion is opposite to the overcurrent direction of the overcurrent bridge 86. The eighth overcurrent portion 34 of the second stationary contact 23 forms a cross current portion, and the overcurrent direction of the cross current portion is the opening direction X2 when the overcurrent direction of the overcurrent bridge 86 is along the Y axis direction to the right and the cross current portion is located on the right side of the overcurrent bridge 86. The magnetic field formed by the current passing through the cross current portion acts on the overcurrent bridge 86 with current passing through, so that the overcurrent bridge 86 is subjected to the first magnetic force F1 towards the stationary contact group 7. The elastic support group 74 is deformed to store energy along the X axis direction. The elastic member 75 is away from the abutting surface 18 along the X axis direction. The movable spring 83 is away from the two stationary contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the on state. As shown in FIG. 26, the current passing through the overcurrent bridge 86 forms an anti-short circuit magnetic loop M1 between the movable magnetic conductor 90 and the stationary magnetic conductor 8. In this embodiment, the number of anti-short circuit magnetic loops M1 is two. At the same time, the reverse current magnetic field M2 formed by the current passing through the reverse current portion formed by the third overcurrent portion 27 is in the same direction as the magnetic induction line formed by the anti-short circuit magnetic loop M1 on one side of the stationary magnetic conductor 8.

[0146] When the coil assembly 37 drives the armature assembly 38 to move in the opening direction X2 after the coil winding 41 receives the second pulse electrical signal, the armature assembly 38 drives the movable contact part 4 to move in the opening direction X2. In this process, the guide portion 109 slides in the sliding groove 13 in the opening direction X2 and guides the movable contact part 4. The elastic support group 74 restores the deformation to release energy. The elastic member 75 is deformed to store energy after abutting against the abutting surface 18. Until it returns to the state shown in FIG. 23 that the armature assembly 38 is in the first position.

[0147] The electric meter (not shown in the figure) in this embodiment uses the above-mentioned relay 1.

[0148] In this embodiment, the stationary contact points 20 of the two stationary contacts 19 are arranged along the Y axis direction, and the movable contact group 72 is closed or opened with the stationary contact group 7 along the X axis direction to correspondingly turn on or off the electrical connection between the two stationary contacts 19. Under this structure, the safety distance between the movable contact group 72 and the stationary contact group 7 is twice the actual distance between the movable contact 87 and the corresponding stationary contact 20 along the X axis direction, so the relay 1 has higher safety and stronger load capacity, which is more conducive to improving the safety distance between the movable contact group 72 and the stationary contact group 7.

[0149] In the embodiment, the static contact 20 of the two static contact pieces 19 is arranged along the Y-axis direction, and the connecting terminal 21 of the two static contact pieces 19 is arranged along the X-axis direction and extends out of the accommodating member 6 along the Y-axis direction. Compared with the static contact piece 19 extending out of the accommodating member 6 along the movement direction of the moving contact piece group 72, the size in the X-axis direction is shortened, and the space in the Y-axis direction is effectively utilized. Therefore, the size of the relay 1 in the X-axis direction and the size in the Y-axis direction are well balanced, which can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0150] In the embodiment, on the basis of retaining the coil assembly of the swing type magnetic latching relay, the two armatures 51 fixed with the permanent magnet 50 in the armature assembly 38 are improved from parallel arrangement to cross each other, so that the armature assembly 38 is converted from swing relative to the coil assembly 37 to linear motion relative to the coil assembly 37. Since the armature assembly 38 moves linearly relative to the coil assembly 37, there is no loss of the radial component of the swing stroke of the swing type magnetic latching relay. Therefore, the space utilization rate of the relay 1 can be higher, which can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0151] In the embodiment, since the axis of the coil winding 41 extends along the Y-axis direction and the two magnetic driving ends 45 are arranged along the Y-axis direction, and the linear motion direction of the armature assembly 38 is the X-axis direction perpendicular to the Y-axis direction, such layout is beneficial to leaving space for the movement of the armature assembly 38 and the moving contact piece group 72 along the X-axis direction. At this time, the size of the accommodating member 6 along the Y-axis direction is mainly determined by the length of the coil assembly 37 along the Y-axis direction, so that the relay 1 does not need to have a long length in one direction (whether the X-axis direction or the Y-axis direction), which can make the relay 1 more easily adapt to limited space, and can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0152] In the embodiment, the push rod and the moving iron core do not need to be arranged in the coil winding 41, so that the support shaft diameter of the coil frame 40 is smaller, and the inner diameter of the coil winding 41 is smaller. Compared with the direct-acting type magnetic latching relay in the prior art, when the space occupied by the coil assembly 37 is the same, the magnetic driving force generated by the coil winding 41 is stronger, and the pushing force on the armature assembly 38 is larger, which can create more favorable conditions for increasing the safety distance between the moving contact piece group 72 and the static contact piece group 7 in a limited space.

[0153] In the embodiment, the two attracting portions 60 of the armature assembly 38 can form a first part of the magnetic circuit without any air gap through the permanent magnet 50 and the two armatures 51, and the two magnetic driving ends 45 of the coil assembly 37 can also form a second part of the magnetic circuit through the entire coil assembly 37. In the magnetic holding state, the attracting portions 60 attract the corresponding magnetic driving ends 45 along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without any air gap, thus the magnetic loss is small, the magnetic efficiency is higher, and the movement stroke of the movable contact set 72 can be increased without increasing the power consumption of the coil assembly 37; and in the case of equivalent magnetic driving force, the power consumption required for the coil assembly 37 to achieve magnetic driving can be reduced, which is conducive to making the size of the coil assembly 37 smaller. Therefore, more favorable conditions can be created for increasing the safety distance between the movable contact set 72 and the static contact set 7 in a limited space.

[0154] In the embodiment, since the second part of the magnetic circuit passes through the entire coil assembly 37, compared with the direct-acting magnetic latching relay in the prior art, the magnetic acting force in the magnetic holding state is larger, and in particular, when the relay 1 is subjected to a fault large current impact, the armature assembly 38 is less likely to move out of the magnetic holding state, which is conducive to avoiding the destructive arc drawn by the movable contact set 72 from the static contact set 7 due to the fault large current.

[0155] In the embodiment, when the coil assembly 37 is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed, in the case that the armature assembly 38 is in the magnetic holding state at the first position, not only the two magnetic driving ends 45 generate magnetic repulsion on the first attracting portion 61 and the third attracting portion 63, but also a first part of the pushing magnetic circuit without any air gap is formed between the fourth attracting portion 64 and the second attracting portion 62 through the armature assembly 38, and a second part of the pushing magnetic circuit through the entire coil assembly 37 is formed by the two magnetic driving ends 45 through the coil assembly 37, the first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit, which only has a certain travel air gap and no other air gap, thus the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends 45 acting on the armature assembly 38 is stronger under the same power consumption, which is more conducive to increasing the safety distance between the movable contact set 72 and the static contact set 7. Similarly, when the coil assembly 37 is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed, in the case that the armature assembly 38 is in the magnetic holding state at the second position, the same technical effects can also be achieved.

[0156] In the embodiment, the first suction part 61 and the fourth suction part 64 are arranged along the X-axis direction, the third suction part 63 and the second suction part 62 are arranged along the X-axis direction, the first suction part 61 and the third suction part 63 are arranged along the Y-axis direction, and the fourth suction part 64 and the second suction part 62 are arranged along the Y-axis direction, so that the four suction parts 60 of the armature assembly 38 are respectively located at the four vertex positions of the rectangle in the first projection plane, facilitating adjustment of the size of the armature assembly 38 along the X-axis direction and the Y-axis direction, and creating more favorable conditions for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0157] In the embodiment, the permanent magnets 50 are arranged on the two sides of the portion 59 intersecting with each other along the Y-axis direction, and the two magnetic poles 54 of the permanent magnets 50 are arranged along the X-axis direction, so that the magnetic driving end 45 and the armature assembly 38 are effectively utilized without increasing the size of the armature assembly 38 along the X-axis direction and the Z-axis direction, which is more conducive to increasing the safety distance between the movable contact group 72 and the static contact group 7. Since each permanent magnet 50 is connected together by two armatures 51, the difference in strength of the magnetic field of each permanent magnet 50 is effectively weakened on the two armatures 51, and the magnetic thrust force between the suction parts 60 on the two sides and the magnetic driving end 45 is more balanced along the X-axis direction, so that the relay 1 is less likely to jam and has a longer service life.

[0158] In the embodiment, the projection of the armature assembly 38 on the first projection plane is mirror-symmetrical along the symmetry plane perpendicular to the Y-axis, so that the consistency of the magnetic field strength on the two sides of the armature assembly 38 along the Y-axis direction is better, and the center of gravity is more easily kept on the symmetry plane, the linear motion of the armature assembly 38 is less likely to be skewed, the relay 1 is less likely to jam and has a longer service life, the magnetic driving force is less likely to be wasted on useless work, and more favorable conditions are created for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0159] In the embodiment, the two movable contact points 87 of the movable contact 85 are arranged along the Y-axis direction and fixed to the overcurrent bridge 86 extending along the Y-axis direction, so that the current passing through the overcurrent bridge 86 flows along the Y-axis direction, facilitating the formation of a magnetic loop for resisting short circuit, and the anti-short-circuit magnetic loop is used to make the movable contact group 72 more reliably closed with the static contact group 7, which is conducive to avoiding the movable contact group 72 from being separated from the static contact group 7 when the relay 1 bears a fault current, thereby avoiding destructive arc drawing to cause damage to the relay 1.

[0160] In the embodiment, the number of the movable contacts 85 in the movable contact group 72 is more than two, and each movable contact 85 is arranged along the Z-axis direction, so that when the movable contact group 72 and the fixed contact group 7 are closed, each movable contact 85 is in parallel with each other, which can increase the load capacity of the relay 1 and reduce the contact resistance between the movable contact 87 and the fixed contact 20. At the same time, in combination with the technical means that the overcurrent bridge 86 extends along the Y-axis direction and the technical means that the movable contact 85 moves along the X-axis direction, the relay 1 can make more full use of the space in each direction, and the structure is more compact, which creates more favorable conditions for increasing the safety distance between the movable contact group 72 and the fixed contact group 7 in a limited space.

[0161] In the embodiment, the connecting terminal 21 of at least one fixed contact 19 is arranged between the fixed contact 20 and the coil winding 41 along the X-axis direction, which increases the distance between the two connecting terminals 21 along the X-axis direction, makes the two fixed contacts 19 less likely to be short-circuited, and can meet the needs of installing an external transformer.

[0162] In the embodiment, the eighth overcurrent part 34 of the second fixed contact 23 forms a cross-flow part, which is located outside the movable contact group 72 along the Y-axis direction and is connected to the connecting terminal 21 in the opening direction. The magnetic field generated by the current of the cross-flow part acts on the overcurrent bridge 86 in the Y-axis direction, which generates a magnetic force on the overcurrent bridge 86 towards the fixed contact group 7. This magnetic force makes the movable contact group 72 more reliably closed with the fixed contact group 7. Since the magnetic force increases with the increase of the current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from being separated from the fixed contact group 7, thereby avoiding the destructive pull arc to cause damage to the relay 1.

[0163] In the embodiment, the movable magnetic conductor group 73 and the fixed magnetic conductor 8 form an anti-short-circuit magnetic loop M1 when the overcurrent bridge 86 flows along the Y-axis direction, so that the movable magnetic conductor group 73 and the movable contact group 72 are subjected to a magnetic force in the closing direction, which makes the movable contact group 72 more reliably closed with the fixed contact group 7. Since the magnetic force increases with the increase of the current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from being separated from the fixed contact group 7, thereby avoiding the destructive pull arc to cause damage to the relay 1.

[0164] In the embodiment, the moving magnetic conductor 90 is arranged corresponding to the moving contact 85, so that an anti-short-circuit magnetic loop M1 can be formed around each moving contact 85, and each moving contact 85 is less likely to be separated from the static contact group 7. The magnetic conductor body 91 is fixed to the back of the overcurrent bridge 86, so that the magnetic field generated by the overcurrent bridge 86 is mostly confined in the anti-short-circuit magnetic loop, and the magnetic efficiency is improved. The extension 92 extends from the magnetic conductor body 91 in the closing direction, so that when the moving contact group 72 is closed with the static contact group 7, the air gap between the moving magnetic conductor 90 and the static magnetic conductor 8 is smaller, the magnetic resistance of the anti-short-circuit magnetic loop M1 is smaller, and the moving contact group 72 is less likely to be separated from the static contact group 7. Therefore, the moving contact group 72 can be more reliably closed with the static contact group 7, and when the relay 1 bears a fault large current, it is beneficial to avoid the moving contact group 72 from being separated from the static contact group 7, so as to avoid the relay 1 from being damaged by a destructive arc.

[0165] In the embodiment, the static magnetic conductor 8 is fixed to the accommodating member 6, so that the static magnetic conductor 8 is more easily installed.

[0166] In the embodiment, the static contact 20 of each static contact 19 is located on the two sides of the static magnetic conductor 8 along the Y-axis direction, so that the magnetic interaction force formed by the anti-short-circuit magnetic loop M1 formed by the static magnetic conductor 8 and the moving magnetic conductor group 73 on the moving contact group 72 is more balanced along the Y-axis direction, and each moving contact 87 is less likely to be separated from the corresponding static contact 20.

[0167] In the embodiment, the overcurrent direction of the reverse flow part is opposite to the overcurrent direction of the overcurrent bridge 86, and the static magnetic conductor 8 is located between the reverse flow part and the moving magnetic conductor group 73 along the X-axis direction, so that the magnetic field generated by the reverse flow part is in the same direction as the magnetic field generated by the anti-short-circuit magnetic loop M1 on the side where the static magnetic conductor 8 is located, and the magnetic field strength of the static magnetic conductor 8 is strengthened, so that the magnetic interaction force between the static magnetic conductor 8 and the moving magnetic conductor group 73 is stronger. When the relay 1 bears a fault large current, the moving contact group 72 is less likely to be separated from the static contact group 7, so as to avoid the relay 1 from being damaged by a destructive arc.

[0168] In the embodiment, the second surface S2 is closer to the moving magnetic conductor group 73 along the X-axis direction than the first surface S1, so that the static magnetic conductor 8 is not embedded between the portions of the two static contacts 19 other than the static contact 20 along the Y-axis direction, the creepage distance between the static contact 19 and the static magnetic conductor 8 is increased, and the withstand voltage capability of the relay 1 is improved. At the same time, it is also beneficial to reduce the distance between the two static contacts 20 along the Y-axis direction, and it is beneficial to reduce the size of the accommodating member 6 along the Y-axis direction, so as to create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0169] In the embodiment, the projections of the portions of all the static contacts 20 capable of contacting the movable contact group 72 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of the static magnetic conductor 8 on the second projection plane, and the surface of the static magnetic conductor 8 facing the movable magnetic conductor group 73 is closer to the movable magnetic conductor group 73 than all the static contacts 20 along the X-axis direction. Therefore, when the movable contact group 72 breaks the arc from the static contact group 7, the magnetic field generated by the two side arcs concentrates on the static magnetic conductor 8, so that the arc is not easy to spread to the two sides along the Y-axis direction, the ablation of the surrounding container 6 by the arc escaping between the movable contact 87 and the static contact 20 can be reduced, and the service life of the relay 1 is ensured. On this basis, the distance between the two static contacts 20 along the Y-axis direction can be designed to be closer, which is beneficial to reducing the size of the container 6 along the Y-axis direction, and can create more favorable conditions for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0170] In the embodiment, the two blocking pieces 9 are fixed to the container 6 and located outside the static contact group 7 along the Y-axis direction. Each blocking piece 9 extends along the X-axis direction, so that the projections of the portions of each static contact 20 capable of contacting the movable contact 87 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of each blocking piece 9 on the second projection plane. Therefore, when the movable contact group 72 breaks the arc from the static contact group 7, the arc will not conduct to the two side walls of the container 6 along the Y-axis direction, ensuring the insulation performance of the container 6. The blocking piece 9 is made of high-temperature-resistant insulating material, which can prevent the heat of the arc from damaging the blocking piece 9 when the load is large and the arc generates a lot of heat, avoiding damage to the blocking piece 9, and is beneficial to improving the load capacity of the relay 1.

[0171] In the embodiment, the elastic support group 74 is arranged between the pushing piece 70 and the movable contact group 72, which can provide an elastic force to the movable contact group 72 along the closing direction X1 after the pushing piece 70 experiences overtravel, so that the movable contact group 72 can be more reliably closed with the static contact group 7. When the relay 1 bears a fault current, the movable contact group 72 is less likely to be separated from the static contact group 7, thereby avoiding damage to the relay 1 caused by destructive arc breaking. The elastic support group 74 can also generate an additional repulsive force when the movable contact group 72 breaks from the static contact group 7, helping the movable contact 85 to disconnect with the static contact group 7.

[0172] In the embodiment, by arranging the limiting piece 76, the distance between the movable contact group 72 and the static contact group 7 when the movable contact group 72 is disconnected from the static contact group 7 can meet the design requirements.

[0173] In the embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, which avoids errors that may occur during assembly of the armature assembly 38 and the pushing piece 70, and also makes the pushing piece 70 and the armature assembly 38 have higher integration and fewer parts, which is beneficial to fully utilizing the limited space.

[0174] In the embodiment, the connecting piece 71 is integrally formed with the push piece 70 by insert injection molding, so that the limiting piece 76 is more easily fixed relative to the push piece 70, and the limiting piece 76 is more rigid, the limiting effect on the movable contactor group 72 is better, and the size of the relay 1 along the Y-axis direction can be saved; the two ends of the connecting piece 71 along the Z-axis direction respectively extend out of the push piece 70 to form the connecting end 84 fixed with the limiting piece 76, the size of the relay 1 along the Z-axis direction can be saved, and more favorable conditions can be created for increasing the safety distance between the movable contactor group 72 and the static contactor group 7 in a limited space.

[0175] In the embodiment, the first elastic part 95 is arranged corresponding to the movable contactor 85, and each movable contactor 85 is fixed to the corresponding first elastic part 95, so that each movable contactor 85 can adjust the posture by the relatively independent first elastic part 95, and it is more conducive to reliably closing the two movable contact points 87 of the movable contactor 85 with the corresponding static contact point 20.

[0176] In the embodiment, the first elastic part 95 includes two first elastic arms 97 fixed with the overcurrent bridge 86, which is conducive to the free swing of the movable contactor 85 to adjust the posture. The positions where the two first elastic arms 97 are fixed with the back of the overcurrent bridge 86 respectively correspond to the positions of the movable contact points 87, so that the elastic force of the two first elastic arms 97 directly acts on the two movable contact points 87, and the two movable contact points 87 can be more reliably closed with the corresponding static contact point 20.

[0177] In the embodiment, the elastic piece 75 stores energy when the push piece 70 moves along the breaking direction X2 due to deformation, and releases energy when the push piece 70 moves along the closing direction X1 due to recovery of the deformation, which can better help the movable contactor group 72 to start from the breaking position and approach the static contactor group 7, and is conducive to increasing the movement stroke of the movable contactor group 72, so as to be conducive to increasing the safety distance between the movable contactor group 72 and the static contactor group 7.

[0178] In the embodiment, the main body 98 of the elastic piece 75 is in a sheet shape and is fixed relative to the push piece 70, and the second elastic arm 101 extends to both sides of the Y-axis direction and can abut against the accommodating piece 6, so that the elastic piece 75 occupies less space along the X-axis direction and has good elastic deformation capability, avoiding that the compression length of the spring increases the size of the movable contact portion 4 along the X-axis direction when the spring is used as the elastic piece 75, thereby being conducive to reducing the size of the relay 1 along the X-axis direction, and thus more favorable conditions can be created for increasing the safety distance between the movable contactor group 72 and the static contactor group 7 in a limited space.

[0179] In the embodiment, the guide part 109 is arranged in the middle along the Y-axis direction, compared with the guide part 109 arranged on both sides along the Y-axis direction, the space along the Y-axis direction can be saved, the size of the relay 1 along the Y-axis direction is avoided to increase, at the same time, the phenomenon that the moving contact part 4 is stuck when moving due to the guide part 109 on both sides along the Y-axis direction is not parallel can be avoided, the magnetic driving force of the magnetic circuit part 3 is not easy to waste on useless work, and more favorable conditions can be created for increasing the safety distance between the moving contact group 72 and the static contact group 7 in the limited space.

[0180] In the embodiment, the limiting part 76 abuts against the moving contact group 72 before the pushing part 70 moves into the overstroke along the closing direction X1, and when entering the overstroke, the moving contact point 87 has abutted against the corresponding static contact point 20, so that the first guide part 103 is arranged on the limiting part 76, the movement of the moving contact 85 along the X-axis direction can be better guided, the moving contact point 87 can correctly abut against the static contact point 20 along the X-axis direction, the contact resistance between the moving contact point 87 and the static contact point 20 is reduced, and the time of pulling the arc when the moving contact point 87 and the static contact point 20 are disconnected is shortened, which is beneficial to increase the service life of the moving contact 72 and the static contact 20. This is because the guide part 109 and the sliding groove 13 are slidably connected along the X-axis direction, and a matching gap is inevitably formed between the two. If the guide part 109 is far away from the moving contact 72 along the X-axis direction, the matching gap will be enlarged during the movement of the moving contact 72, so that the moving contact point 87 cannot correctly abut against the static contact point 20 along the X-axis direction, thereby increasing the contact resistance between the moving contact point 87 and the static contact point 20, and the time of pulling the arc when the moving contact point 87 and the static contact point 20 are disconnected is longer, which is not conducive to the service life of the moving contact point 87 and the static contact point 20.

[0181] In the embodiment, the first guide part 103 is arranged on the limiting part 76, which means that the sliding groove 13 is arranged on the accommodating part 6. Since the static contact group 7 is fixedly connected to the accommodating part 6, the sliding groove 13 arranged on the accommodating part 6 is beneficial to ensure that the extension direction of the sliding groove 13 is perpendicular to the arrangement direction of the static contact points 20 of the two static contacts 19, so that the sliding groove 13 can guide the guide part 109 along the X-axis direction more accurately.

[0182] In the embodiment, the first guide part 103 is located at the front part of the limiting body 102 along the closing direction, so that the first guide part 103 is closer to the moving contact point 87 along the X-axis direction, which is more conducive to the moving contact point 87 to correctly abut against the static contact point 20 along the X-axis direction, reduces the contact resistance between the moving contact point 87 and the static contact point 20, and shortens the time of pulling the arc when the moving contact point 87 and the static contact point 20 are disconnected, which is beneficial to increase the service life of the moving contact point 87 and the static contact point 20.

[0183] In the embodiment, the projection of the first guide part 103 on the first projection surface is circular, which is beneficial to avoid the sliding fit between the first guide part 103 and the sliding groove 13 to be stuck.

[0184] In the embodiment, the material of the first guide part 103 is plastic, which is conducive to avoiding the first guide part 103 scratching the plastic material of the accommodating part 6 when the first guide part 103 is made of metal, thereby preventing the contact resistance between the moving contact 87 and the stationary contact 20 from being affected by the scratches falling on the moving contact 87 and the stationary contact 20. The material of the limiting body 102 is metal, which is more rigid and has a better limiting effect on the moving contact group 72. The first guide part 103 and the limiting body 102 are integrally formed by insert injection molding, the combination of the two is better, the position of the first guide part 103 along the Y-axis direction is more accurate, and the first guide part 103 is conducive to better sliding cooperation with the sliding groove 13 along the X-axis direction.

[0185] In the embodiment, the first guide part 103 cooperates with the second guide part 78, which can better keep the moving contact part 4 moving along the X-axis direction by sliding with the sliding groove 13 along the X-axis direction. The second guide part 78 is arranged on the pushing body 77, so that there is a certain distance between the first guide part 103 and the second guide part 78 along the X-axis direction, which is more conducive to not enlarging the cooperation gap between the guide part 109 and the sliding groove 13.

[0186] In the embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, and the second guide part 78 is arranged on the pushing piece 70, which is conducive to guiding the attraction between each attraction part 60 along the X-axis direction and the corresponding magnetic driving end 45, avoiding the cooperation gap between the first guide part 103 and the sliding groove 13 being enlarged at the pushing piece 70 when only the first guide part 103 is arranged, so that the attraction part 60 cannot correctly attract the magnetic driving end 45 along the X-axis direction, ensuring that there is no air gap between the first part of the armature assembly 38 and the second part formed in the coil assembly 37 after the attraction part 60 attracts the magnetic driving end 45, improving the magnetic efficiency and increasing the magnetic driving force, thereby being conducive to increasing the safety distance between the moving contact group 72 and the stationary contact group 7.

[0187] In the embodiment, the projection of the second guide part 78 on the first projection surface is circular, which is conducive to avoiding the sliding cooperation between the second guide part 78 and the sliding groove 13 from being jammed.

[0188] In the embodiment, whether the first groove segment 14 and the second groove segment 15 are connected or not, since both of them are formed in the accommodating part 6, the sliding groove 13 can be ensured to extend along the X-axis direction.

[0189] In the embodiment, by arranging the micro switch 5, the on-off state of the relay 1 can be known by the external relay state sensing circuit. It is convenient to manage the relay 1.

[0190] In this embodiment, the static contact terminal 110 is located between the moving spring 83 and the coil winding 41 along the X-axis direction, which can effectively utilize the space between the pusher 70 and the coil winding 41, avoid increasing the size of the accommodation member 6 along the Y-axis direction when the static contact terminal 110 is arranged outside the coil assembly 37 along the Y-axis direction, and create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in limited space. The moving spring 83 is fixedly connected with the pusher 70, so that the position and action of the moving spring 83 are more determined.

[0191] In this embodiment, by arranging the shielding cover 39, the magnetic field of the coil assembly 37 is compressed in the iron core 43 and the yoke 44, the magnetic field strength between the two magnetic driving ends 45 is improved, which is beneficial to improve the magnetic efficiency and the pushing force of the magnetic circuit part 3, can create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in limited space, and can also avoid the magnetic circuit part 3 being affected by external magnetic field.

[0192] Embodiment Two

[0193] The difference between embodiment two and embodiment one is the magnetic circuit part 3. The rest is basically the same as embodiment one.

[0194] In the magnetic circuit part 3, the coil assembly 37 in embodiment two is the same as the coil assembly 37 in embodiment one. The difference lies in the armature assembly 38 and the shielding cover 39.

[0195] Referring to FIGS. 27-30, FIGS. 27 and 30 show the armature assembly 38 in embodiment two. As shown in FIGS. 27 and 28, 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 respectively correspond to one polarity, and each is provided with two attraction portions 60. Specifically, the first armature 57 and the second armature 58 are each provided with a fixed portion 111 fixed to one magnetic pole 54 of the permanent magnet 50. The fixed portion 111 of the first armature 57 is a first fixed portion 112, and the first fixed portion 112 is fixed to the first magnetic pole 55 of the permanent magnet 50. The fixed portion 111 of the second armature 58 is a second fixed portion 113, and the second fixed portion 113 is fixed to the second magnetic pole 56 of the permanent magnet 50. The two fixed portions 111 are each perpendicular to the Z-axis direction and are plate-shaped. The two attraction portions 60 of each armature 51 extend from the fixed portion 111 along the Z-axis direction. Here, the "attraction portions 60 extend from the fixed portion 111 along the Z-axis direction" means that the attraction portions 60 as a whole extend from the edges of the fixed portion 111 along the Z-axis direction. Specifically, the first attraction portion 61 and the second attraction portion 62 respectively extend downward along the Z-axis direction from the left front side and the right rear side of the first fixed portion 112, and are each spaced apart from the permanent magnet 50 along the X-axis direction; the third attraction portion 63 and the fourth attraction portion 64 respectively extend upward along the Z-axis direction from the right front side and the left rear side of the second fixed portion 113, and are each spaced apart from the permanent magnet 50 along the X-axis direction. In this embodiment, the armatures 51 are each bent from a plate or sheet material, the intersection of the attraction portions 60 and the fixed portion 111 forms a first dimension along the Y-axis direction, the intersection of the fixed portion 111 and the magnetic pole 54 of the permanent magnet 50 forms a second dimension along the X-axis direction, the ratio of the first dimension to the second dimension is between 0.6 and 1.4, and in this embodiment, the two are equal, and greater than 0.8.

[0196] As shown in FIG. 28 and FIG. 29, the top end of each attracting portion 60 along the extending direction of the attracting portion 60 forms an attracting portion avoiding structure 115, and the two attracting portion avoiding structures 115 of the fixed portion 111 of each armature 51 corresponding to the fixed portion 111 of the other armature 51 forms a fixed portion avoiding structure 114, wherein the extending direction of the attracting portion 60 of each armature 51 refers to the direction of the attracting portion 60 along the Z-axis direction from the fixed portion 111 to the fixed portion 111 of the other armature 51, and the top end of the attracting portion 60 along the extending direction of the attracting portion 60 refers to the end of the attracting portion 60 along the Z-axis direction close to the fixed portion 111 of the other armature 51. Through the attracting portion avoiding structure 115 and the fixed portion avoiding structure 114, the top end of each attracting portion 60 of each armature 51 and the fixed portion 111 of the other armature 51 are spaced apart along the X-axis direction and the Y-axis direction. In the embodiment, the fixed portion avoiding structure 114 is a fixed portion missing corner, and in the embodiment, the fixed portion missing corner is formed by the fixed portion 111 by setting a slope parallel to the Z-axis direction, and in other embodiments, the fixed portion missing corner can also be other shapes. In the embodiment, the attracting portion avoiding structure is an attracting portion missing corner, and in the embodiment, the attracting portion missing corner is formed by the attracting portion 60 by setting a slope parallel to the X-axis direction, and in other embodiments, the attracting portion missing corner can also be other shapes.

[0197] As shown in FIG. 29, the first fixed portion 112 of the first armature 57 is provided with a first fixed portion avoiding structure 116 and a second fixed portion avoiding structure 117 on both sides thereof along the Y-axis direction, the first fixed portion avoiding structure 116 being used for avoiding the top end of the third attraction portion 63, and the second fixed portion avoiding structure 117 being used for avoiding the top end of the fourth attraction portion 64. The top end of the first attraction portion 61 of the first armature 57 is provided with a first attraction portion avoiding structure 120 used for avoiding the second fixed portion 113, and the top end of the second attraction portion 62 of the first armature 57 is provided with a second attraction portion avoiding structure 121 used for avoiding the second fixed portion 113. The second fixed portion 113 of the second armature 58 is provided with a third fixed portion avoiding structure 118 and a fourth fixed portion avoiding structure 119 on both sides thereof along the Y-axis direction, the third fixed portion avoiding structure 118 being used for avoiding the top end of the second attraction portion 62, and the fourth fixed portion avoiding structure 119 being used for avoiding the top end of the first attraction portion 61. The top end of the third attraction portion 63 of the second armature 58 is provided with a third attraction portion avoiding structure 122 used for avoiding the first fixed portion 112, and the top end of the fourth attraction portion 64 of the second armature 59 is provided with a fourth attraction portion avoiding structure 123 used for avoiding the first fixed portion 112. In the present embodiment, the first fixed portion avoiding structure 116, the second fixed portion avoiding structure 117, the third fixed portion avoiding structure 118 and the fourth fixed portion avoiding structure 119 are all fixed portion avoiding structures 114. The first attraction portion avoiding structure 120, the second attraction portion avoiding structure 121, the third attraction portion avoiding structure 122 and the fourth attraction portion avoiding structure 123 are all attraction portion avoiding structures 115.

[0198] The first fixed portion avoiding structure 116 and the third attraction portion avoiding structure 122 are correspondingly arranged so as to form a space between the first fixed portion 112 and the top end of the third attraction portion 63 along the X-axis direction and the Y-axis direction. The second fixed portion avoiding structure 117 and the fourth attraction portion avoiding structure 123 are correspondingly arranged so as to form a space between the first fixed portion 112 and the top end of the fourth attraction portion 64 along the X-axis direction and the Y-axis direction. The third fixed portion avoiding structure 118 and the second attraction portion avoiding structure 121 are correspondingly arranged so as to form a space between the second fixed portion 113 and the top end of the second attraction portion 62 along the X-axis direction and the Y-axis direction. The fourth fixed portion avoiding structure 119 and the first attraction portion avoiding structure 120 are correspondingly arranged so as to form a space between the second fixed portion 113 and the top end of the first attraction portion 61 along the X-axis direction and the Y-axis direction.

[0199] As shown in FIG. 30, in the present embodiment, the top end of the attraction section 60 of each armature 51 is flush with the surface where the fixed section 111 of the other armature 51 and the magnetic pole 54 of the permanent magnet 50 are fixed along the extension direction of the attraction section 60. In other embodiments, the top end of the attraction section 60 of each armature 51 can exceed the surface where the fixed section 111 of the other armature 51 and the magnetic pole 54 of the permanent magnet 50 are fixed along the extension direction of the attraction section 60.

[0200] The magnetic circuit part 3 in the present embodiment has substantially the same operating principle as the magnetic circuit part 3 in Embodiment One. In the present embodiment, the projection of the armature assembly on a first projection plane perpendicular to the Z-axis direction is mirror-symmetrical along the symmetry plane perpendicular to the Y-axis.

[0201] Referring to FIG. 31, FIG. 31 shows the shielding cover 39 in the present embodiment. As shown in FIG. 29, the shielding cover 39 is fixed to the outer surface of the accommodating member 6 and covers the coil winding 41 outside along the Z-axis direction and the X-axis direction.

[0202] Embodiment Two is a further improvement of Embodiment One. In Embodiment One, the permanent magnets 50 located on both sides of the part 59 intersecting with each other along the Y-axis direction, if formed by magnetizing the magnetic steel, the permanent magnets 50 on both sides need to be magnetized twice because the directions of the magnetic poles 54 are opposite along the X-axis direction. This can cause at least two problems, the first problem is the risk of incorrect magnetization direction of the magnetic steel, the second problem is that if the distance between the two magnetic steels along the Y-axis direction is close, the magnetic steel can be demagnetized during the second magnetization, resulting in poor consistency of the magnetic parameters of the permanent magnets 50 on both sides. In the present embodiment, even if the number of permanent magnets 50 is more than one, because the magnetic poles 54 of the permanent magnets 50 are arranged along the Z-axis direction, the magnetic poles 54 of each permanent magnet 50 are the same along the Z-axis direction, so the magnetization can be completed at one time, thus solving the above two problems well, which is conducive to ensuring the consistency of the magnetic field strength of the attraction section 60 on both sides of the armature assembly 38 along the Y-axis direction, and also ensuring that the two armatures 51 have a larger contact area with the permanent magnets 50 to improve the magnetic cross-section and magnetic efficiency.

[0203] In the present embodiment, the attraction section 60 extends from the fixed section 111 along the Z-axis direction, which can avoid the sudden change of the magnetic cross-section caused by the perpendicular extension direction of the fixed section 111 and the attraction section 60.

[0204] In the embodiment, each suction part 60 and the fixed part 111 of the other armature 51 are spaced apart in the X-axis direction and the Y-axis direction by the suction part avoiding structure 115 and the fixed part avoiding structure 114. Compared with the case where the avoiding structure is only provided on the suction part 60 but not on the fixed part 111, the length of one of the fixed part 111 and the suction part 60 in the Y-axis direction can be reduced, and the volume of the permanent magnet 50 can be increased, thereby increasing the magnetic attraction force and the magnetic holding force. In addition, the position where the fixed part 111 and the suction part 60 meet in the Y-axis direction can be reduced in size, thereby increasing the magnetic cross section, reducing the magnetic resistance, improving the magnetic conduction efficiency, and increasing the response speed of the armature assembly 38 and the magnetic attraction force and the magnetic holding force.

[0205] In the embodiment, each suction part 60 and the fixed part 111 of the other armature 51 are spaced apart in the X-axis direction and the Y-axis direction by the suction part avoiding structure 115 and the fixed part avoiding structure 114. Compared with the case where the avoiding structure is only provided on the suction part 60 but not on the fixed part 111, the length of one of the fixed part 111 and the suction part 60 in the Y-axis direction can be reduced, and the volume of the permanent magnet 50 can be increased, thereby increasing the magnetic attraction force and the magnetic holding force. In addition, the position where the fixed part 111 and the suction part 60 meet in the Y-axis direction can be reduced in size, thereby increasing the magnetic cross section, reducing the magnetic resistance, improving the magnetic conduction efficiency, and increasing the response speed of the armature assembly 38 and the magnetic attraction force and the magnetic holding force.

[0206] Specifically, in the armature assembly 38, since the two armatures 51 are fixedly connected with the two magnetic poles of the permanent magnet 50 respectively and are used to bear different polarities, the design of the armature assembly 38 generally needs to consider the isolation of the two armatures 51, that is, the two armatures 51 in the armature assembly 38 cannot be in direct contact, otherwise a magnetic short circuit will be caused, and the magnetic efficiency and the required magnetic holding force will be reduced, which is not conducive to improving the stability and anti-interference strength of the relay 1. In the embodiment, the fixed connection part 111 of each suction part 60 and the other armature 51 is designed to be spaced along the X-axis direction and the Y-axis direction, therefore, the length of the fixed connection part 111 along the Y-axis direction can be set to be larger than the spacing between the two suction parts 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 position of the suction part 60 and the fixed connection part 111 along the Y-axis direction can also be set to be larger. The increase of the size of the fixed connection part 111 along the Y-axis direction is conducive to setting 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 for suction with the magnetic driving end 45 is larger, the magnetic suction force is larger, and the magnetic suction stability is also higher; the length of the intersection position of the suction part 60 and the fixed connection part 111 along the Y-axis direction is set to be larger, which is conducive to making the magnetic conductive area change uniformly, reducing the magnetic resistance, and improving the magnetic conductive efficiency and the magnetic suction force.

[0207] In the embodiment, the fixed connection part and the suction part are formed by a slope, and the fixed connection part avoiding structure 114 and the suction part avoiding structure 115 are correspondingly formed, so that the transition of the magnetic conductive cross section of the fixed connection part 111 and the suction part 60 is uniform, the magnetic leakage can be reduced, the magnetic efficiency can be ensured, and the suction surface of the suction part 60 can maintain a larger size, so that the volume of the permanent magnet 50 can be larger, and therefore the magnetic conductive efficiency is higher, and the magnetic suction force and the magnetic holding force are larger.

[0208] In the embodiment, since the fixed connection part 111 and the suction part 60 simultaneously avoid, the top end of the suction part 60 of each armature 51 can be flush with or exceed the surface where the fixed connection part 111 of the other armature 51 is fixedly connected with the magnetic pole 54 of the permanent magnet 50 along the extension direction of the suction part 60, the suction area of the suction part 60 and the magnetic driving end 45 is ensured, and the rotating force of the armature assembly 38 is avoided or reduced.

[0209] In the embodiment, the two armatures 51 are both bent from a plate or a sheet, which can reduce the manufacturing difficulty and cost, and has material consistency, avoiding the change of the magnetic conductive cross section caused by material splicing and the like.

[0210] In the embodiment, the ratio of the first size to the second size is between 0.6 and 1.4, which can ensure that the overall magnetic conductive efficiency of the armature 51 is relatively consistent at the key position, and avoid reducing the magnetic conductive section and reducing the magnetic efficiency due to the inconsistent extension direction of the attraction part 60 and the fixed part 111 and the large difference between the first size and the second size.

[0211] In the embodiment, the ratio of the minimum magnetic conductive section to the maximum magnetic conductive 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 section and reducing the magnetic efficiency due to the inconsistent extension direction of the attraction part 60 and the fixed part 111.

[0212] In the embodiment, the number of permanent magnets 50 is only one, so the structure is simple, and the cost of the armature assembly 38 is reduced. The embodiment is also beneficial to increase 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 larger, the magnetic driving force of the magnetic driving end 45 on the armature assembly 38 is also larger, 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.

[0213] In the embodiment, the projection of the armature assembly 38 on the first projection plane is mirror symmetrical along the symmetry plane perpendicular to the Y-axis, so that the consistency of the magnetic field intensity on both sides of the armature assembly 38 along the Y-axis direction is better, and the center of gravity is also easier to keep on the symmetry plane. The straight line motion of the armature assembly 38 is less likely to be skewed, the relay 1 is less likely to jam and has a longer service life, the magnetic driving force is less likely to be wasted on useless work, and more favorable conditions can be created for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0214] The above description and embodiment are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application.

[0215] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0216] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent protection scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A magnetic circuit portion, characterized by, The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator.

2. A magnetic circuit portion as claimed in claim 1, characterized in that The application relates to a magnetic actuator.

3. A magnetic circuit portion as claimed in claim 2, characterized in that The application relates to a magnetic actuator.

4. A magnetic circuit portion as claimed in claim 3, characterized in that The application relates to a magnetic actuator.

5. A magnetic circuit portion as claimed in claim 4, characterized in that The application relates to a magnetic actuator.

6. A magnetic circuit portion according to any one of claims 3 to 5, characterized in that The application relates to a magnetic actuator.

7. A magnetic circuit portion as claimed in claim 2, characterized in that The application relates to a magnetic actuator.

8. A magnetic circuit portion as claimed in claim 2, characterized in that The application relates to a magnetic actuator.

9. A magnetic circuit portion as claimed in claim 1, characterized in that The application relates to a magnetic actuator.

10. A magnetic circuit portion as claimed in claim 1, characterized in that The application relates to a magnetic actuator.

11. A magnetic circuit portion as claimed in claim 1, characterized in that The application relates to a magnetic actuator.

12. A magnetic circuit section as claimed in claim 1, characterized in that: The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a magnetic actuator. The application relates to a 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 of claim 1, wherein, The coil assembly comprises a coil winding, a core and two yokes; the axis of the coil winding extends along the Y-axis direction; the core is arranged in the coil winding along the Y-axis direction, and the two yokes are fixedly connected to the core at one end and form the magnetic driving end at the other end.

15. A magnetic latching relay characterized by, The magnetic circuit part comprises a static contact group, a moving contact part and any one of claims 1 to 14; the static contact group comprises two static contacts; the moving contact part comprises a moving contact group, which is driven by the armature assembly to close or open the static contact group along the X-axis direction to turn on or turn off the electrical connection between the two static contacts.

16. The magnetic latching relay according to claim 15, wherein: Further comprising a containing part; one of the containing part and the moving contact part is provided with a sliding groove, and the other is provided with a guide part; The sliding groove extends along the X-axis direction, and the guide part extends into the sliding groove along the Z-axis direction to slide with the sliding groove along the X-axis direction.

17. The magnetic latching relay according to claim 16, wherein: The moving contact group comprises a moving contact, which is provided with an overcurrent bridge and a moving contact point, and the two ends of the overcurrent bridge are provided with the moving contact points along the Y-axis direction; the moving contact point can abut against the corresponding static contact along the closing direction, and the moving contact point can move away from the corresponding static contact along the opening direction; the closing direction and the opening direction are both the X-axis direction; The guide part is centrally located between the two moving contact points of the moving contact along the Y-axis direction.

18. A relay according to claim 17, wherein the relay is a miniature relay. The moving contact part further comprises a pushing part, an elastic support group and a limiting part; the pushing part is fixedly connected to the armature assembly, and the pushing part moves along the X-axis direction to drive the moving contact group to close or open the static contact group along the X-axis direction; the elastic support group is arranged between the pushing part and the moving contact group along the X-axis direction; the limiting part is fixed relative to the pushing part and abuts against the moving contact group along the opening direction when the moving contact group is opened; the guide part comprises a first guide part, and the first guide part is arranged on the limiting part.

19. A relay according to claim 18, wherein the relay is a latching relay. The pushing part and the armature assembly are integrally formed by insert injection molding.

20. A relay according to claim 18, wherein the relay is a miniature relay. The limiting part further comprises a limiting body fixedly connected to the first guide part, and the limiting body is provided with a limiting part and two connecting parts; the limiting part and the two connecting parts are an integral structure; the limiting part can abut against the overcurrent bridge, and the two connecting parts extend along the opening direction from the two ends of the limiting part along the Z-axis direction and are connected to the pushing part.

21. A relay according to claim 20, wherein the relay is a miniature relay. The number of the first guide parts is two, and the number of the sliding grooves is two; the two first guide parts extend into the corresponding sliding grooves from the limiting body along the Z-axis direction away from each other, and the two first guide parts are arranged along the Z-axis direction.

22. A relay according to claim 20, wherein the relay is a miniature relay. The first guide part is located at the front part of the limiting body along the closing direction.

23. A relay according to claim 20, wherein the relay is a miniature relay. The projection of the first guide part on a first projection plane perpendicular to the Z-axis direction is circular; and / or, The material of the first guide part is plastic, the material of the limiting body is metal, and the first guide part and the limiting body are integrally formed by insert injection molding, or are bonded, or are threadedly connected.

24. A relay according to claim 18, wherein the relay is a miniature relay. The guide part further comprises a second guide part; the second guide part is arranged on the pushing member.

25. A relay according to claim 24, wherein the relay is a miniature relay. The pushing member further comprises a pushing body, the number of the second guide parts is two, the two second guide parts extend into the corresponding sliding grooves from the pushing body along the Z-axis direction and away from each other, and the two second guide parts are arranged along the Z-axis direction.

26. A relay according to claim 24, wherein the relay is a miniature relay. The projection of the second guide part on a first projection plane perpendicular to the Z-axis direction is circular.

27. A relay according to claim 24, wherein the relay is a miniature relay. Each sliding groove is divided into a first groove segment capable of slidingly cooperating with the first guide part and a second groove segment capable of slidingly cooperating with the second guide part; the first groove segment and the second groove segment are connected or separated along the X-axis direction.

28. An electrical meter, characterized by A magnetic latching relay according to any one of claims 15-27.

Images