Magnetic circuit part, magnetic latching relay and electricity meter

Abstract

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

Description

TECHNICAL FIELD

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

[0002] An intelligent electric meter generally integrates a wiring unit, a communication unit, a measurement unit, a control unit and an execution unit in a meter shell. The relay, as a main component of the execution unit, is controlled by the control unit and acts on the wiring unit to switch the external circuit on and off. In order to save power, the relay in the intelligent electric meter generally adopts a magnetic latching relay. Due to the limited space in the meter shell and the high integration, 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 improvement 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 on the moving contact group and the stationary contact on the stationary contact group in the direction of disconnection when the moving contact group and the stationary contact group are disconnected.

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

[0004] The swing type magnetic latching relay comprises a fixed part, a magnetic circuit part and a movable contact part. The fixed part generally comprises a housing and a set of stationary contacts. The magnetic circuit part comprises a coil assembly fixed relative to the housing and an armature assembly swinging relative to the housing. The coil assembly generally comprises a coil winding, a core and two yokes. The core is disposed in the coil winding, and the two yokes are fixed to two ends of the core. The two yokes form two magnetic driving ends at their ends away from the core, and the two magnetic driving ends are arranged along a first direction. The armature assembly comprises a permanent magnet and two armatures. The permanent magnet and the two armatures are arranged in an I-shaped manner, and the two armatures are parallel to each other and sandwich the permanent magnet therebetween. The coil winding is excited by a pulse electrical signal to reverse the polarity of the two magnetic driving ends temporarily formed, so as to drive the armature assembly to swing relative to the housing about a rotation axis perpendicular to the first direction. The movable contact part comprises a swing lever, a pusher and a set of movable contacts. The swing lever is fixed to the armature assembly. The armature assembly drives the swing lever to swing about the rotation axis and drives the pusher to move linearly along the tangent direction of the swing stroke, so as to make the set of movable contacts in the contact part close or open with the set of stationary contacts, and correspondingly turn on or turn off the 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 motion 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 pushing force between the magnetic driving end and the armature assembly, which will further lead to the increase of the energy consumption of the relay and the increase of the volume and weight of the permanent magnet, thereby further increasing the volume of the relay. Due to the above reasons, the swing type magnetic latching relay in the prior art is difficult to meet the demand of increasing the safety distance between the set of movable contacts and the set of stationary contacts in a limited space.

[0005] The prior art direct-acting magnetic latching relay also comprises a fixed part, a magnetic circuit part and a moving contact part. The fixed part comprises a housing and a 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 push piece fixed to the push rod and a moving contact group arranged on the push piece. The push rod moves linearly with the armature and drives the push piece and the moving contact group to close or disconnect with the static contact group, thereby turning on or turning off the external circuit. The prior art direct-acting magnetic latching relay is arranged in the order of the push rod, the armature, the coil winding and the yoke cylinder from the inside to the outside in the radial direction. Therefore, the coil support shaft diameter of the coil winding of the prior art direct-acting magnetic latching relay is relatively large. Since the coil winding is arranged along the movement direction of the push rod, the armature also moves along the movement direction of the push rod between the yoke plate and the static iron core. Therefore, the length of the prior art direct-acting magnetic latching relay along the movement direction of the push rod is much longer than that of the swing-type magnetic latching relay. If the safety distance between the moving contact group and the static contact group needs to be increased, the length of the prior art direct-acting magnetic latching relay, which is already very long, needs to be further 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 prior art direct-acting magnetic latching relay forms an air gap, the magnetic efficiency is low, and the required pushing force is larger. Therefore, the prior art direct-acting magnetic latching relay is also difficult to meet the demand of increasing the safety distance between the moving contact group and the static contact group in a limited space. Practical new type content

[0006] The purpose of the present application is to overcome the above-mentioned defects or problems in the background art, and to 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.

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

[0008] The first technical solution relates to a magnetic circuit part, which comprises a coil assembly and an armature assembly; the coil assembly is provided with two magnetic driving ends arranged along the Y-axis direction; the armature assembly comprises a permanent magnet and two armatures, the two magnetic poles of the permanent magnet are arranged along the Z-axis direction, the two armatures are fixedly connected with the two magnetic poles of the permanent magnet and correspond to one polarity respectively, and each armature is provided with two attracting parts, each attracting part is suitable for attracting 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 positions of the two armatures in the X-axis direction and drive the armature assembly to move along the X-axis direction.

[0009] The second technical solution is based on the first technical solution, wherein each armature is provided with a fixed connection part fixedly connected with the magnetic pole of the permanent magnet, and the two attracting parts extend from the fixed connection part along the Z-axis direction.

[0010] The third technical solution is based on the second technical solution, wherein the top end of each attracting part along the extension direction of the attracting part forms an attracting part avoiding structure, and the fixed connection part of each armature corresponds to the attracting part avoiding structures of the two attracting parts of the other armature to form a fixed connection part avoiding structure; through the attracting part avoiding structure and the corresponding fixed connection part avoiding structure, the top end of each attracting part of each armature and the fixed connection part of the other armature form a spacing along the X-axis direction and the Y-axis direction.

[0011] The fourth technical solution is based on the third technical solution, wherein the fixed connection part avoiding structure is a fixed connection part corner, and the attracting part avoiding structure is an attracting part corner.

[0012] The fifth technical solution is based on the fourth technical solution, wherein the fixed connection part corner is formed by setting a slope parallel to the Z-axis direction on the fixed connection part, and the attracting part corner is formed by setting a slope parallel to the X-axis direction on the attracting part.

[0013] The sixth technical solution is based on any one of the third to fifth technical solutions, wherein the top end of the attracting part of each armature along the extension direction of the attracting part is flush with or exceeds the surface where the fixed connection part of the other armature is fixedly connected with the magnetic pole of the permanent magnet.

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

[0015] The eighth technical solution is based on the second technical solution, wherein the size of the attracting part along the Y-axis direction at the intersection with the fixed connection part is a first size; the size of the fixed connection part along the X-axis direction at the fixed connection with the magnetic pole of the permanent magnet is a second size, and the ratio of the first size to the second size is between 0.6 and 1.4.

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

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

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

[0019] The twelfth technical solution is based on the first technical solution, wherein the two armatures are a first armature and a second armature, the two attraction portions of the first armature are a first attraction portion and a second attraction portion, and the two attraction portions of the second armature are a third attraction portion and a fourth attraction portion; the armature assembly moves between a first position and a second position along the X-axis direction; in the first position, the first attraction portion and the third attraction portion attract the two magnetic driving ends respectively; in the second position, the fourth attraction portion and the second attraction portion attract the two magnetic driving ends respectively.

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

[0021] The fourteenth technical solution is based on the first technical solution, wherein the coil assembly includes a coil winding, 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 fixed to the core at one end and form the magnetic driving ends at the other end.

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

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

[0024] Compared with the prior art, the above-mentioned solutions have the following beneficial effects:

[0025] The first technical solution compares 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 movable contact group and the static contact group in a limited space.

[0026] The first technical solution is compared with the direct-acting magnetic latching relay in the prior art. Since the two magnetic driving ends are arranged along the Y-axis direction, the corresponding coil winding shaft 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 providing space for the movement of the armature assembly and the movable contact group along the X-axis. At this time, the size of the accommodating member along the Y-axis direction is mainly determined by the length of the coil assembly along the Y-axis direction. Therefore, the first technical solution does not require a long length in one direction (whether the X-axis direction or the Y-axis direction) for the relay, which makes it easier for the relay to adapt to limited space and creates more favorable conditions for increasing the safety distance between the movable contact group and the static contact group in limited space.

[0027] The first technical solution is compared with the direct-acting magnetic latching relay in the prior art. Since the two magnetic driving ends are arranged along the Y-axis direction, the corresponding coil winding shaft 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 providing space for the movement of the armature assembly and the movable contact group along the X-axis. At this time, the size of the accommodating member along the Y-axis direction is mainly determined by the length of the coil assembly along the Y-axis direction. Therefore, the first technical solution does not require a long length in one direction (whether the X-axis direction or the Y-axis direction) for the relay, which makes it easier for the relay to adapt to limited space and creates more favorable conditions for increasing the safety distance between the movable contact group and the static contact group in limited space.

[0028] In the first technical solution, the two attracting parts 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 that penetrates the entire coil assembly. In the magnetic holding state, the attracting parts attract the corresponding magnetic driving ends along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without air gap, thereby reducing magnetic loss and improving magnetic efficiency. In the case of equivalent magnetic driving force, it is conducive to reducing the power consumption required for the coil assembly to achieve magnetic driving, and conducive to making the size of the coil assembly smaller. Therefore, it creates more favorable conditions for increasing the safety distance between the movable contact group and the static contact group in limited space.

[0029] In the magnetic holding state, the direct-acting magnetic latching relay in the prior art often forms two magnetic circuits that resist each other, 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 movable iron core are opposite. In the second technical solution, the second part of the magnetic circuit penetrates the entire coil assembly, so there is no such problem. Therefore, 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 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 movable contact group separating from the static contact group due to a fault current.

[0030] In the first technical solution, the magnetic poles of the permanent magnet are arranged along the Z-axis direction, and the two armatures are fixedly connected with the two magnetic poles of the permanent magnet respectively corresponding to one polarity, and each is provided with two attracting portions, each of which is suitable for attracting the corresponding magnetic driving end along the X-axis direction; so that the armature assembly can balance the magnetic field intensity on both sides along the Y-axis direction even if there is only one permanent magnet.

[0031] In the second technical solution, the two attracting portions extend from the fixed connection portion along the Z-axis direction, and through the spatial layout of the entire armature assembly, the attracting portions extending along the Z-axis direction can be attracted along the X-axis direction by the magnetic driving 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 attracting portions extend from the fixed connection portion along the Z-axis direction" means that the attracting portions as a whole extend from the edge of the fixed connection portion along the Z-axis direction. Therefore, the sudden change of the magnetic conduction cross section caused by the extension direction of the fixed connection portion and the attracting portion being perpendicular can be avoided.

[0032] In the third technical solution, the fixed connection portion of each attracting portion and the fixed connection portion of the other armature form a spacing along the X-axis direction and a spacing along the Y-axis direction through the attracting portion avoiding structure and the fixed connection portion avoiding structure. Compared with only avoiding structure in the attracting portion and not in the fixed connection portion, it can avoid the attracting area being reduced due to the size of the attracting portion along its extension direction being too small, and the reduction of the attracting area will cause the suction force of the end of the attracting portion away from the fixed connection portion of the same armature to decrease, 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.

[0033] In the third technical solution, the fixed connection portion of each attracting portion and the fixed connection portion of the other armature form a spacing along the X-axis direction and a spacing along the Y-axis direction through the attracting portion avoiding structure and the fixed connection portion avoiding structure. Compared with only avoiding structure in the fixed connection portion and not in the attracting portion, it can avoid the length of one of the fixed connection portion and the attracting portion being reduced along the Y-axis direction, and further avoid the magnetic attraction force and the magnetic holding force being weak due to the volume of the permanent magnet being unable to be large, and avoid the magnetic conduction cross section being small due to the size of the position where the fixed connection portion and the attracting portion meet being reduced along the Y-axis direction, and the small 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 the magnetic attraction force and the magnetic holding force to weaken.

[0034] Specifically, in the armature assembly, the two armatures are fixedly connected with the two magnetic poles of the permanent magnet respectively and used to bear different polarities, and thus the design of the armature assembly usually needs to consider the isolation of the two armatures, that is, the two armatures in the armature assembly cannot be directly contacted, otherwise a magnetic short circuit will be caused, the magnetic efficiency will be reduced, and the required magnetic holding force will be reduced, which is not conducive to improving the stability and anti-interference strength of the relay. In the third technical solution, the fixed connection part of each attraction part and the other armature is designed to be spaced along the X-axis direction and the Y-axis direction, and thus the length of the fixed connection part along the Y-axis direction can be set to be larger than the interval of the two attraction parts arranged along the Y-axis direction, the length of the two attraction parts extending along the Z-axis direction can also be set to be longer, and the length of the intersection position of the attraction part and the fixed connection part along the Y-axis direction can also be set to be larger. Among them, the increase of the size of the fixed connection part along the Y-axis direction is conducive to setting a larger volume of the permanent magnet, thereby improving the magnetic efficiency and the magnetic holding force that can be obtained. The length of the two attraction parts extending along the Z-axis direction is set to be longer, so that the area of the attraction part used for attracting the magnetic driving end is larger, the magnetic attraction force is larger, and the magnetic attraction stability is higher. The length of the intersection position of the attraction part and the fixed connection part 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, improving the magnetic conductive efficiency and the magnetic attraction force.

[0035] In the fourth and fifth technical solutions, the fixed connection part and the attraction part are formed with an inclined surface to form a fixed connection part missing corner and an attraction part missing corner, and then corresponding fixed connection part avoiding structures and attraction part avoiding structures are formed, so that the magnetic conductive cross section of the fixed connection part and the attraction part is uniformly transitioned, the magnetic leakage is reduced, the magnetic efficiency is ensured, and the attraction surface of the attraction part is kept larger in size, so that the volume of the permanent magnet can be increased, and thus the magnetic conductive efficiency is higher, and the magnetic attraction force and the magnetic holding force are larger.

[0036] In the sixth technical solution, since the fixed connection part and the attraction part are simultaneously avoided, the top end of the attraction part of each armature can be flush with or exceed the surface of the fixed connection part of the other armature and the magnetic pole of the permanent magnet, the attraction area of the attraction part and the magnetic driving end is ensured, and the rotating force of the armature assembly is avoided or reduced.

[0037] In the seventh technical solution, the two armatures 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.

[0038] In the eighth technical solution, the ratio of the first size to the second size is between 0.6 and 1.4, which can ensure the overall magnetic conductive efficiency of the armature to be relatively consistent at the key position, and avoid reducing the magnetic conductive cross section and the magnetic efficiency due to the difference between the first size and the second size and the inconsistency of the extension directions of the attraction part and the fixed connection part.

[0039] Compared with the ninth technical solution, the two magnetic poles of the permanent magnet are arranged along the X-axis direction, and the two armatures intersect each other on the first projection plane of the permanent magnet perpendicular to the Z-axis direction. The two permanent magnets are located on both sides of the intersecting part along the Y-axis direction. The permanent magnet can be magnetized once, so as to avoid the magnetization error caused by twice magnetization or the problem of poor consistency of the magnetic parameters of each permanent magnet. This is because the permanent magnets located on both sides of the intersecting part along the Y-axis direction are formed by magnetizing the magnetic steel. Therefore, the magnetic poles of the two permanent magnets are opposite along the X-axis direction, and thus twice magnetization is required to complete the magnetization. This will 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 two magnetic steels are close along the Y-axis direction, the magnetic steel may be demagnetized during the second magnetization, resulting in poor consistency of the magnetic parameters of the two permanent magnets. In the technical solution, the magnetic poles of the permanent magnet 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, which can well solve the above two problems, and is beneficial to ensuring that the magnetic field strengths of the two sides of the armature assembly along the Y-axis direction are consistent. At the same time, it can also ensure that the two armatures have a large contact area with the permanent magnet, so as to improve the magnetic cross section and magnetic efficiency.

[0040] In the tenth technical solution, the number of permanent magnets is only one, so the structure is simple, the cost of the armature assembly is reduced, and the problem caused by twice magnetization does not exist. In addition, the seventh technical solution is also beneficial to increasing the size of the permanent magnet along the Y-axis direction, the X-axis direction and the Z-axis direction, so as to make the magnetic holding force of the armature assembly larger, the magnetic driving force of the magnetic driving end on the armature assembly larger, and create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0041] In the eleventh technical solution, the projection of the armature assembly on the first projection plane is mirror symmetrical along the symmetry plane perpendicular to the Y-axis, so that the consistency of the magnetic field strengths of the two sides of the armature assembly along the Y-axis direction is better, and the center of gravity is also easier to keep on the symmetry plane. The 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 more favorable conditions can be created for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0042] In the twelfth technical solution, when the coil assembly is excited by the pulse electric signal to reverse the polarity temporarily formed by the two magnetic driving ends, 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 attraction part and the second attraction part 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. The push magnetic circuit only has a certain travel air gap, and has no other air gap, so the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends acting 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 temporarily formed by the two magnetic driving ends, the same technical effects are also achieved.

[0043] In the thirteenth technical solution, 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, facilitating the adjustment of the size of the armature assembly along the X-axis and Y-axis directions, and creating more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0044] In the fourteenth technical solution, 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. This layout is conducive to giving space for the movement of the armature assembly and the moving contact group along the X-axis direction. Therefore, the first technical solution does not require a long length of the relay in one direction (whether the X-axis direction or the Y-axis direction), and can make the relay more easily adapt 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.

[0045] The fifteenth technical solution is to apply the above-mentioned magnetic circuit part to the specific implementation of the magnetic latching relay, so it has the technical effects corresponding to the technical solutions it refers to. 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 between the moving contact and the corresponding static contact along the X-axis direction, so the relay has higher safety and stronger load capacity, and is more conducive to increasing the safety distance between the moving contact group and the static contact group.

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

[0047] In order to more clearly illustrate the technical solutions of the embodiments, the following briefly introduces the drawings needed to be used:

[0048] Figure 1 is a perspective view of the relay in Embodiment One;

[0049] Figure 2 is a top view of the housing in Embodiment One;

[0050] Figure 3 is a perspective view of the cover in Embodiment One;

[0051] Figure 4 is a perspective view of the static contact group in Embodiment One;

[0052] Figure 5 is a perspective view of the static magnetic conductor in Embodiment One;

[0053] Figure 6 is a top view of the static magnetic conductor in Embodiment One;

[0054] Figure 7 is a front view of the magnetic circuit part in Embodiment One;

[0055] Figure 8 is a top view of the coil assembly in Embodiment One;

[0056] Figure 9 is a top view of the armature assembly in Embodiment One;

[0057] Figure 10 is a right view of the armature assembly in Embodiment One;

[0058] Figure 11 is a perspective view of the shielding cover in Embodiment One;

[0059] Figure 12 is a state diagram of the magnetic circuit part when the armature assembly is in a magnetic holding state at a first position in Embodiment One;

[0060] Figure 13 is a state diagram of the magnetic circuit part when the coil winding receives a first pulse electric signal in Embodiment One;

[0061] Figure 14 is a state diagram of the magnetic circuit part when the armature assembly moves to a second position in Embodiment One;

[0062] Figure 15 is a state diagram of the magnetic circuit part when the armature assembly is in a magnetic holding state at the second position in Embodiment One;

[0063] Figure 16 This is a schematic diagram of the magnetic circuit state when the coil winding receives the second pulse electrical signal in Embodiment 1;

[0064] Figure 17 This is a schematic diagram of the magnetic circuit state when the armature assembly moves to the first position in Embodiment 1;

[0065] Figure 18 This is a top view of the movable contact part in Embodiment 1;

[0066] Figure 19 This is a front view of the pusher component in Embodiment 1;

[0067] Figure 20 This is an exploded perspective view of some components of the moving contact part in Embodiment 1;

[0068] Figure 21 This is a right view of the limiting component in Embodiment 1;

[0069] Figure 22 for Figure 21 Sectional view along axis AA;

[0070] Figure 23 This is a schematic diagram of the internal structure of the relay when it is in the off state in Embodiment 1;

[0071] Figure 24 This is a schematic diagram of the internal structure of the relay when it is in the ON state in Embodiment 1;

[0072] Figure 25 This is a right view of the relay in Embodiment 1;

[0073] Figure 26 for Figure 25 BB-direction sectional view;

[0074] Figure 27 This is a top view of the magnetic circuit section in Example 2;

[0075] Figure 28 This is a perspective view of the armature assembly in Example 2;

[0076] Figure 29 This is an exploded perspective view of the armature assembly in Example 2;

[0077] Figure 30 This is a left view of the armature assembly in Embodiment 2;

[0078] Figure 31 This is a perspective view of the relay in Example 2.

[0079] Explanation of key figure labels:

[0080] 1. relay; 2. fixed part; 3. magnetic circuit part; 4. movable contact part; 5. micro switch; 6. accommodating member; 7. static contact piece group; 8. static magnetic conductor; 9. blocking member; 10. housing; 11. cover; 12. accommodating cavity; 13. sliding groove; 14. first groove section; 15. second groove section; 16. static magnetic conductor groove; 17. blocking member groove; 18. abutting surface; 19. static contact piece; 20. static contact point; 21. connecting terminal; 22. first static contact piece; 23. second static contact piece; 24. first overcurrent portion; 25. first static contact point; 26. second overcurrent portion; 27. third overcurrent portion; 28. fourth overcurrent portion; 29. fifth overcurrent portion; 30. sixth overcurrent portion; 27a. measurement terminal; 31. first connecting terminal; 32. seventh overcurrent portion; 33. second static contact point; 34. eighth overcurrent portion; 35. ninth overcurrent portion; 36. second connecting terminal; 37. coil assembly; 38. armature assembly; 39. shielding cover; 40. coil holder; 41. coil winding; 42. signal input terminal; 43. core; 44. yoke; 45. magnetic driving end; 46. first yoke; 47. second yoke; 48. first magnetic driving end; 49. second magnetic driving end; 50. permanent magnet; 51. armature; 52. first permanent magnet; 53. second permanent magnet; 54. magnetic pole; 55. first magnetic pole; 56. second magnetic pole; 57. first armature; 58. second armature; 59. mutually intersecting portions; 60. attraction portion; 61. first attraction portion; 62. second attraction portion; 63. third attraction portion; 64. fourth attraction portion; 65. first shielding member; 66. second shielding member; 67. partition wall; 68. connecting wall; 69. recess; 70. pushing member; 71. connecting member; 72. movable contact piece group; 73. movable magnetic conductor group; 74. elastic support group; 75. elastic member; 76. limiting member; 77. pushing body; 78. second guide portion; 79. accommodating portion; 80. first insert portion; 81. second insert portion; 82. connecting column; 83. movable spring; 84. connecting end; 85. movable contact piece; 86. overcurrent bridge; 87. movable contact point; 88. first movable contact point; 89. second movable contact point; 90. movable magnetic conductor; 91. magnetic conductor body; 92. extension portion; 93. elastic support; 94. frame body; 95. first elastic portion; 96. first connecting hole; 97. first elastic arm; 98. main body; 99. second elastic portion; 100. second connecting hole; 101. second elastic arm; 102. limiting body; 103. first guide portion; 104. limiting portion; 105. connecting portion; 106. avoiding hole; 107. assembly hole; 108. bending portion; 109. guide portion; 110. static contact terminal; 111. fixed connection portion; 112. first fixed connection portion; 113. second fixed connection portion; 114. fixed connection portion avoiding structure; 115. attraction portion avoiding structure; 116. first fixed connection portion avoiding structure; 117. second fixed connection portion avoiding structure; 118. third fixed connection portion avoiding structure; 119. fourth fixed connection portion 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 acting force; M1, short-circuit resistant magnetic circuit; M2, backflow magnetic field; S1, first surface; S2, second surface; W, interval; X1, closing direction; X2, opening direction. DETAILED DESCRIPTION

[0081] In the claims and 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.

[0082] In the claims and specification, the terms "first", "second" or "third" and the like are used only to distinguish different objects, and are not used to describe a particular order.

[0083] In the claims and specification, the terms "fixedly connected", "fixedly connected" or "relatively fixed" should be understood in a broad sense, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0084] In the claims and specification, the terms "including", "having" and their variants mean "including but not limited to" unless otherwise defined.

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

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

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

[0088] In the claims and specification, unless otherwise defined, the term "reversing" means that the polarity of the magnetic driving end temporarily formed by the coil winding this time is opposite to the polarity of the magnetic driving end temporarily formed by the coil winding last time, when the coil winding this time receives a pulse electric signal with a current direction different from the pulse electric signal last time. Of course, those skilled in the art should understand that, for a magnetic latching relay, if the coil assembly this time receives a pulse electric signal with a current direction same as the pulse electric signal last time, the pulse electric signal this time is meaningless for control, and the state of the relay will not change.

[0089] In the claims and specification, unless otherwise defined, the term "back surface" means the surface facing away from the static contact group.

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

[0091] Embodiment One

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

[0093] Referring to Figure 1 , Figure 1 The structure of the relay 1 in this embodiment is shown. As Figure 1 shown, the relay 1 includes a fixed part 2, a magnetic circuit part 3, a moving contact part 4, and a micro switch 5. The parts of the fixed part 2 are fixed relative to each other and can serve as a movement reference for the moving contact part 4. The magnetic circuit part 3 is used to receive a pulse electric signal and drive the moving contact part 4 to move based on the pulse electric signal. The moving contact part 4 is driven by the magnetic circuit part 3 to move along the X-axis direction relative to the fixed part 2 to control the on-off of the external circuit. The micro switch 5 is used to send a relay state signal to an external relay state sensing circuit.

[0094] As Figure 1 shown, the fixed part 2 includes a housing 6, a static contact group 7, a static flux guide 8, and a barrier 9.

[0095] As shown in Figure 1 , the material of the accommodating member 6 is plastic, and the accommodating member 6 comprises a shell 10 and a cover 11.

[0096] Referring to Figure 2 , Figure 2 , the shell 10 in this embodiment is shown. As shown in Figure 2 , the shell 10 is provided with a cavity 12 which is open upward along the Z-axis direction and used for accommodating the static contact group 7, the static magnetic conductor 8, the blocking member 9, the magnetic circuit part 3, the movable contact part 4 and the micro switch 5. The bottom wall of the shell 10 is provided with a sliding groove 13 in the middle part along the Y-axis direction, and the sliding groove 13 extends along the X-axis direction and is divided into a first groove section 14 and a second groove section 15. The first groove section 14 is located in front of the second groove section 15. In this embodiment, the first groove section 14 and the second groove section 15 of the shell 10 are separated from each other along the X-axis direction, and in other embodiments, the first groove section 14 and the second groove section 15 of the shell 10 can be arranged to be connected to each other along the X-axis direction. The front of the first groove section 14 is provided with a static magnetic conductor groove 16. The left and right sides of the first groove section 14 along the Y-axis direction are respectively provided with a blocking member groove 17. The rear of the two blocking member grooves 17 is respectively provided with an abutting surface 18 which is arranged forward.

[0097] Referring to Figure 3 , Figure 3 , the cover 11 in this embodiment is shown. As shown in Figure 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 in correspondence with 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 in correspondence with the second groove section 15 of the shell 10 along the Z-axis direction. In this embodiment, the first groove section 14 and the second groove section 15 of the cover 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.

[0098] Referring to Figure 4 , Figure 23 and Figure 26 , Figure 4 , Figure 23 and Figure 26The static contact group 7 in the embodiment is shown. The static contact group 7 is used to electrically connect with external circuit. The static contact group 7 comprises two static contacts 19. Each static contact 19 is provided with a static contact point 20 and a connecting terminal 21. The connecting terminal 21 is used to connect external circuit. One of the two connecting terminals 21 is used to connect power supply, and the other is used to connect load. When the two static contacts 19 are turned on, the power supply and the load are turned on; when the two static contacts 19 are turned off, the power supply and the load are turned off. Specifically, in the embodiment, the two static contacts 19 are respectively a first static contact 22 and a second static contact 23. The first static contact 22 is provided with a first 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 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 Figure 23 , the third overcurrent part 27 penetrates the accommodating part 6 along the Y-axis direction. As shown in Figure 4 , the lower part of the third overcurrent part 27 along the Z-axis direction is provided with a measurement terminal 27a extending downward along the Z-axis direction, as shown in Figure 26 , the measurement terminal 27a extends downward out of the accommodating part 6 along the Z-axis direction. As shown in Figure 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 third overcurrent part 27 along the Z-axis direction. In the embodiment, the part of the third overcurrent part 27 extending out of the accommodating part 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 facing backward along the X-axis direction, Figure 4The first surface S1 of the seventh flow portion 32 and the first surface S1 of the first flow portion 24 are located on the same plane perpendicular to the X axis. The second stationary contact points 33 are the stationary contact points 20 of the second stationary contact 23. The number of the second stationary contact points 33 is two, and the two second stationary contact points 33 are arranged along the Z axis direction. The two second stationary contact points 33 extend backward from the first surface S1 of the seventh flow portion 32 along the X axis direction. The eighth flow portion 34 extends backward along the X axis direction from the right side of the seventh flow portion 32 along the Y axis direction. The ninth flow portion 35 extends rightward along the Y axis direction from the rear end along the X axis direction and the lower part along the Z axis direction of the eighth flow portion. As shown in Figure 23 , the ninth flow portion 35 extends rightward along the Y axis direction out of the accommodating member 6. In this embodiment, the ninth flow portion 35 constitutes the second connecting terminal 36. The second connecting terminal 36 is the connecting terminal 21 of the second stationary contact 23. The second connecting terminal 36 can be used to install a mutual inductor. In this embodiment, the two connecting terminals 21 are arranged along the X axis direction and each extends rightward along the Y axis direction out of the accommodating member 6.

[0099] Referring to Figure 5 and Figure 6 , Figure 5 and Figure 6 , the stationary magnet 8 in this embodiment is shown. As shown in Figure 5 , the stationary magnet 8 extends along the Z axis direction. As shown in Figure 6 , the surface of the stationary magnet 8 along the X axis direction forward forms the second surface S2. The second surface S2 is perpendicular to the X axis direction.

[0100] Referring to Figure 1 , Figure 1 , the barrier 9 in this embodiment is shown. In this embodiment, the number of the barrier 9 is two. Each barrier 9 is in the shape of a sheet and extends along the X axis direction, and has a size along the Z axis direction. Therefore, the two 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.

[0101] Referring to Figure 7 , Figure 7 , the magnetic circuit part 3 in this embodiment is shown. As shown in Figure 7 , the magnetic circuit part 3 includes a coil assembly 37, an armature assembly 38, and a shield 39.

[0102] Referring to Figure 7 and Figure 8 , Figure 7 and Figure 8 , the coil assembly 37 in this embodiment is shown. As shown in Figure 7 and Figure 8As shown, the coil assembly 37 comprises 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 two ends of the coil frame 40 along the Y-axis direction are respectively provided with a retaining wall. The coil winding 41 is wound on the coil frame 40 and located between the two retaining walls. The axis of the coil winding 41 extends along the Y-axis direction. The two wire ends 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 placed in the central hole of the coil frame 40 and extends along the Y-axis direction. The number of yokes 44 is two. The two yokes 44 are respectively fixed to the two sides of the core 43 along the Y-axis direction, and the ends of the two yokes 44 away from the core 43 respectively form magnetic driving ends 45. 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 respectively a first yoke 46 and a second yoke 47. The two magnetic driving ends 45 are respectively a first magnetic driving end 48 and a second magnetic driving end 49. The first magnetic driving end 48 is formed on the first yoke 46, and the second magnetic driving end 49 is formed on the second yoke 47. The coil winding 41 is excited by the pulse electrical signals to reverse the polarity temporarily formed by the two magnetic driving ends 45, so as to switch the different positions of the two armatures 51 in the X-axis direction and drive the armature assembly 38 to move along the X-axis direction. In this 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 a 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 this embodiment refers to the polarity of the magnetic driving end 45 formed by the pulse electrical signal disappearing with the disappearance of the pulse electrical signal. The "reversal" in this embodiment refers to that when the coil winding 41 receives a pulse electrical signal with a current direction different from that of the last received pulse electrical signal, 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.

[0103] Referring to Figure 9 and Figure 10 , Figure 9 and Figure 10The armature assembly 38 in the embodiment is shown. The armature assembly 38 is driven by the coil assembly 37 to move along the X-axis direction between a first position and a second position. When the armature assembly 38 moves to the first position, the relay 1 is in an off state, and the external circuit is turned off. When the armature assembly 38 moves to the second position, the relay 1 is in an on state, and the external circuit is turned on. The first position is more rearward along the X-axis direction than the second position. As shown in FIGS. 1 and 2, the armature assembly 38 is in the first position when the relay 1 is in the off state, and the armature assembly 38 is in the second position when the relay 1 is in the on state. Figure 9 and Figure 10 As shown in FIGS. 1 and 2, the armature assembly 38 in the embodiment includes two permanent magnets 50 and two armatures 51. The two permanent magnets 50 are formed of magnetized magnetic steel, and in other embodiments, the two permanent magnets 50 can also be made of other permanent magnet materials, such as neodymium-iron-boron permanent magnets. In the embodiment, the two permanent magnets 50 are respectively a first permanent magnet 52 and a second permanent magnet 53. Each permanent magnet 50 is provided with two magnetic poles 54 with fixed polarity, and the two magnetic poles 54 are respectively a first magnetic pole 55 and a second magnetic pole 56. The first magnetic pole 55 and the second magnetic pole 56 have opposite polarities. For the convenience of introduction, it is assumed that the polarity of the first magnetic pole 55 is N-pole, and the polarity of the second magnetic pole 56 is S-pole. In the embodiment, the two magnetic poles 54 of each permanent magnet 50 are arranged along the X-axis direction. In the embodiment, the two permanent magnets 50 are arranged along the Y-axis direction. The first permanent magnet 52 is on the left side along the Y-axis direction, and the second permanent magnet 53 is on the right side along the Y-axis direction. The first magnetic pole 55 of the first permanent magnet 52 is forward along the X-axis direction, and the second magnetic pole 56 is rearward along the X-axis direction. The first magnetic pole 55 of the second permanent magnet 53 is rearward along the X-axis direction, and the second magnetic pole 56 is forward along the X-axis direction. The two armatures 51 are respectively a first armature 57 and a second armature 58. The first armature 57 is fixedly connected to the first magnetic poles 55 of the two permanent magnets 50. The second armature 58 is fixedly connected to the second magnetic poles 56 of the two permanent magnets 50. The projections of the two armatures 51 on a first projection plane perpendicular to the Z-axis direction cross each other. The portions 59 where the two armatures 51 cross each other form a spacing W along the Z-axis direction. Each armature 51 is provided with two attracting portions 60 on both sides along the Y-axis direction. The first armature 57 is provided with a first attracting portion 61 and a second attracting portion 62 on both sides along the Y-axis direction, the first attracting portion 61 is on the left side along the Y-axis direction and is forward along the X-axis direction, and the second attracting portion 62 is on the right side along the Y-axis direction and is rearward along the X-axis direction. The second armature 58 is provided with a third attracting portion 63 and a fourth attracting portion 64 on both sides along the Y-axis direction, the third attracting portion 63 is on the right side along the Y-axis direction and is forward along the X-axis direction, and the fourth attracting portion 64 is on the left side along the Y-axis direction and is rearward along the X-axis direction. Therefore, in the embodiment, the first attracting portion 61 and the third attracting portion 63 are arranged along the Y-axis direction, the fourth attracting portion 64 and the second attracting portion 62 are arranged along the Y-axis direction, the first attracting portion 61 and the fourth attracting portion 64 are arranged along the X-axis direction, and the third attracting portion 63 and the second attracting portion 62 are arranged along the X-axis direction. In the embodiment, the projection of the armature assembly 38 on the first projection plane is mirror-symmetric relative to a symmetry plane perpendicular to the Y-axis direction.

[0104] Referring to Figure 7 and Figure 11 , Figure 7 and Figure 11 The shield 39 in the present embodiment is shown. As Figure 11 indicated, the shield 39 comprises a first shield 65 and a second shield 66. The first shield 65 and the second shield 66 are insertedly fitted to form the shield 39. The shield 39 is provided with two shielding walls 67 and a connecting wall 68. Each of the shielding walls 67 is provided with a groove 69 at a front end thereof along the X-axis direction, the groove 69 extending along the X-axis direction and being located at a middle portion of the shielding wall 67 along the Y-axis direction. As Figure 7 indicated, the two shielding walls 67 are both arranged perpendicularly to the Z-axis direction. The two shielding walls 67 are arranged above and below the coil assembly 37 along the Z-axis direction. The connecting wall 68 is arranged perpendicularly to the X-axis direction and is used to connect the two shielding walls 67. The connecting wall 68 is arranged behind the coil assembly 37 along the X-axis direction.

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

[0106] As Figure 12 indicated, in the present embodiment, the armature assembly 38 is located between the arms of the two yokes 44 extending along the X-axis direction along the Y-axis direction. The first magnetic driving end 48 is located between the first attracting portion 61 and the fourth attracting portion 64 along the X-axis direction; the second magnetic driving end 49 is located between the third attracting portion 63 and the second attracting portion 62 along the X-axis direction.

[0107] Figure 12 The state of the magnetic circuit portion 3 when the armature assembly 38 in the present embodiment is in the magnetic holding state at the first position is shown. As Figure 12As shown, when the armature assembly 38 is in the magnetically held state in the first position, the first engaging part 61 engages the first magnetic drive end 48, and the third engaging part 63 engages the second magnetic drive end 49. At this time, the magnetic circuit part 3 forms two closed magnetic loops, namely the first closed magnetic loop and the second closed magnetic loop. The first closed magnetic loop starts from the first magnetic pole 55 of the first permanent magnet 52, passes through the first engaging part 61, the first magnetic drive end 48, the first yoke 46, the iron core 43, the second yoke 47, the second magnetic drive end 49, the third engaging part 63, the part 59 where the second armature 58 intersects, and the second magnetic pole 56 of the first permanent magnet 52, and returns to the first magnetic pole 55 of the first permanent magnet 52, without any air gap in between, and passes through the entire coil assembly 37. The second closed magnetic circuit extends from the first pole 55 of the second permanent magnet 53, through the intersecting portions 59 of the first armature 57, the first engaging portion 61, the first magnetic drive end 48, the first yoke 46, the core 43, the second yoke 47, the second magnetic drive end 49, the third engaging portion 63, and the second pole 56 of the second permanent magnet 53 back to the first pole 55 of the second permanent magnet 53, without any air gaps in between, and passes through the entire coil assembly 37. Therefore, when the armature assembly 38 is in the magnetic holding state in the first position, due to the existence of the first closed magnetic circuit and the second closed magnetic circuit, and the superposition effect between the two, a greater magnetic attraction is generated between the first engaging portion 61 and the first magnetic drive end 48, and between the third engaging portion 63 and the second magnetic drive end 49, so that the armature assembly 38 is held in the first position relative to the coil assembly 37.

[0108] Figure 13 This illustration shows the state of the magnetic circuit portion 3 when the coil assembly 37 in this embodiment has just received the first pulse electrical signal. (As shown...) Figure 13As shown, 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. Moreover, 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 first magnetic driving end 48, 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, and only has two stroke air gaps in the middle and passes through the entire coil assembly 37. The second push magnetic circuit passes through the first magnetic driving end 48, 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, and also only has two stroke air gaps in the middle and passes through the entire coil assembly 37. 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 due to the existence of the first push magnetic circuit and the second push magnetic circuit, and the superposition effect between the two, 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, 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 first position to the second position along the closing direction X1.

[0109] Figure 14 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 along the closing direction X1 in the embodiment is shown. As shown in FIG. 6, 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 first attraction part 61 have the same S-pole polarity, the first magnetic driving end 48 generates the magnetic attraction force to the first attraction part 61; since the second magnetic driving end 49 and the third attraction part 63 have the same N-pole polarity, the second magnetic driving end 49 generates the magnetic attraction force to the third attraction part 63. Moreover, 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 first magnetic driving end 48, 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, and only has two stroke air gaps in the middle and passes through the entire coil assembly 37. The second push magnetic circuit passes through the first magnetic driving end 48, 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, and also only has two stroke air gaps in the middle and passes through the entire coil assembly 37. Therefore, when the coil assembly 37 just receives the second pulse electric signal, not only 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, but also due to the existence of the first push magnetic circuit and the second push magnetic circuit, and the superposition effect between the two, 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, 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 opening direction X2. Figure 14As shown, when the armature assembly 38 has just moved to the second position, the first pulse electrical signal and the first magnetic field have not yet disappeared. The first magnetic drive end 48 still temporarily has the N pole polarity, and the second magnetic drive end 49 still temporarily has the S pole polarity. At this time, the magnetic circuit part 3 forms two closed magnetic loops, namely the third closed magnetic loop and the fourth closed magnetic loop. The third closed magnetic loop starts from the first magnetic drive end 48, passes through the fourth 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 part 59 where the first armature 57 intersects with each other, the second attraction part 62, the second magnetic drive end 49, the second yoke 47, the iron core 43, and the first yoke 46, and returns to the first magnetic drive end 48. There is no air gap in between, and it passes through the entire coil assembly 37. The fourth closed magnetic circuit originates from the first magnetic drive end 48, passes through the fourth attraction part 64, the intersecting portion 59 of the second armature 58, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second attraction part 62, the second magnetic drive end 49, the second yoke 47, the iron core 43, and the first yoke 46, returning to the first magnetic drive end 48 without any air gaps and passing through the entire coil assembly 37. Therefore, when the armature assembly 38 has just moved to the second position, due to the existence of the third and fourth closed magnetic circuits and the superposition effect between them, a greater magnetic attraction is generated between the first magnetic drive end 48 and the fourth attraction part 64, and between the second magnetic drive end 49 and the second attraction part 62.

[0110] Figure 15 This illustration shows the state of the magnetic circuit portion 3 when the armature assembly 38 in the second position is in the magnetic holding state. For example... Figure 15 As shown, when the first pulse electrical signal disappears, the first magnetic field disappears, and the first magnetic drive end 48 and the second magnetic drive end 49 no longer have the polarity generated by the first magnetic field. At this time, the aforementioned third closed magnetic circuit and fourth closed magnetic circuit still exist. The third closed magnetic circuit can be considered to originate from the first magnetic pole 55 of the first permanent magnet 52, and its path is... Figure 14 The path of the third closed magnetic circuit shown is the same; the fourth closed magnetic circuit can be considered to start from the first magnetic pole 55 of the second permanent magnet 53, and its path is the same as... Figure 14 The path of the fourth closed magnetic circuit shown is the same. The third closed magnetic circuit and the fourth closed magnetic circuit are superimposed on each other, so that a greater magnetic attraction is generated between the fourth attraction part 64 and the first magnetic drive end 48 and between the second attraction part 62 and the second magnetic drive end 49, and the armature assembly 38 is held in the second position relative to the coil assembly 37.

[0111] Figure 16 This illustration shows the state of the magnetic circuit portion 3 when the coil assembly 37 in this embodiment has just received the second pulse electrical signal. (As shown...) Figure 16As shown, 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. Moreover, the magnetic circuit part 3 at this time forms two push magnetic loops, i.e. the third push magnetic loop and the fourth push magnetic loop. The third push magnetic loop starts from the second magnetic driving end 49, passes through the stroke air gap, the third attraction part 63, the part 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the first 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 and passes through the entire coil assembly 37. The fourth push magnetic loop starts from the second magnetic driving end 49, passes 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 part 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 also only has two stroke air gaps in the middle and passes through the entire coil assembly 37. 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 loop and the fourth push magnetic loop, and the superposition effect between the two, 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.

[0112] Figure 17 As shown, when the armature assembly 38 is driven by the coil assembly 37 to move to the first position along the breaking direction X2 in this embodiment, the state of the magnetic circuit part 3 is shown. As shown, Figure 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, 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 Figure 12 The first closed magnetic loop and the second closed magnetic loop are shown, wherein the first closed magnetic loop can be regarded as starting from the second magnetic driving end 49, and its path is the same as that of the third push magnetic loop. Figure 12The path of the first closed magnetic loop shown is the same; the second closed magnetic loop can be considered to start from the second magnetic drive end 49, and its path is the same as... Figure 12 The path of the second closed magnetic circuit shown is the same. Therefore, when the armature assembly 38 just moves to the first position, due to the existence of the first closed magnetic circuit and the second closed magnetic circuit, and the superposition effect between the two, a greater magnetic attraction force is generated between the first magnetic drive end 48 and the first attraction part 61, and between the second magnetic drive end 49 and the third attraction part 63.

[0113] When the second pulse electrical signal disappears, the second magnetic field disappears, and the first magnetic drive end 48 and the second magnetic drive end 49 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 38... Figure 12 As shown, it is in a magnetically held state in the first position.

[0114] See Figure 18 , Figure 18 The movable contact portion 4 in this embodiment is shown. For example... Figure 18 As shown, the movable contact part 4 includes a pusher 70, a connector 71, a movable contact assembly 72, a movable magnetic conductor assembly 73, an elastic support assembly 74, an elastic element 75, and a limiting element 76.

[0115] See Figure 19 , Figure 19 The pusher 70 and connector 71 in this embodiment are shown. Figure 19 As shown, in this embodiment, the armature assembly 38, the connector 71, and the moving spring 83 are fixedly connected to the pusher 70. Specifically, the armature assembly 38, the connector 71, and the moving spring 83 are integrally injection molded with the pusher 70 insert. The pusher 70 is made of plastic. The pusher 70 has a pusher body 77 and two second guide portions 78. The pusher body 77 has a receiving portion 79, a first insert portion 80, and a second insert portion 81. The receiving portion 79 is used to receive the armature assembly 38. The first insert portion 80 is used to receive the connector 71 and is located in front of the receiving portion 77 along the X-axis direction. The front surface of the first insert portion 78 has two connecting posts 82. The two connecting posts 82 are arranged along the Z-axis direction. Each connecting post 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 to receive 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 in detail later. Two second guide portions 78 extend from the push body 77 away from each other along the Z-axis direction. In this embodiment, the two second guide portions 78 extend from the upper and lower surfaces of the receiving portion 79 away from each other along the Z-axis direction, respectively, and are disposed at the middle of the receiving portion 79 along the Y-axis direction and the middle of the receiving portion 79 along the X-axis direction. The projection of each second guide portion 78 onto a first projection plane perpendicular to the Z-axis direction is circular.

[0116] likeFigure 19 As shown, the connecting piece 71 extends along the Z-axis direction, and two ends thereof along the Z-axis direction respectively extend out of the first insert part 80 to form two connecting ends 84.

[0117] Referring to Figure 20 , Figure 20 The moving contactor group 72, the moving magnet conductor group 73, the elastic support group 74 and the elastic member 75 in the present embodiment are shown. The moving contactor group 72 is driven by the armature assembly 38 and the pusher 70 integrally formed with the armature assembly 38 by insert injection molding to close or disconnect with the static contactor group 7 along the X-axis direction, so as to correspondingly turn on or turn off the electrical connection between the two static contacts 19. As shown, Figure 20 The moving contactor group 72 includes two moving contacts 85. The two moving contacts 85 are arranged along the Z-axis direction. Each moving contact 85 is provided with 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 static contact point 20. Specifically, the moving contact point 87 opposite to the first static contact point 25 along the X-axis direction is the first moving contact point 88; the moving contact point 87 opposite to the second static contact point 33 along the X-axis direction is the second moving contact point 89. When the moving contactor group 72 is closed with the static contactor group 7, each first moving contact point 88 abuts against the corresponding first static contact point 25 along the X-axis direction, each second moving contact point 89 abuts against the corresponding second static contact point 33 along the X-axis direction, and the first static contact 22 and the second static contact 23 are turned on through the two moving contacts 85. When the moving contactor group 72 is disconnected with the static contactor group 7, each first moving contact point 88 is away from the corresponding first static contact point 25 along the X-axis direction, and each second moving contact point 89 is away from the corresponding second static contact point 33 along the X-axis direction, and the first static contact 22 and the second static contact 23 are turned off.

[0118] The moving magnet conductor group 73 is fixed opposite to the moving contactor group 72 and arranged opposite to the static magnet conductor 8 along the X-axis direction. As shown, Figure 20 The moving magnet conductor group 73 includes moving magnet conductors 90, and the moving magnet conductors 90 are arranged opposite to the moving contacts 85. In the present embodiment, the number of the moving magnet conductors 90 is two, and the two moving magnet conductors 90 are arranged along the Z-axis direction. Each moving magnet conductor 90 is provided with a magnet conductor body 91 and two extension parts 92. The magnet conductor 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 static contactor group 7. The extension part 92 extends forward along the X-axis direction from the two ends of the magnet conductor body 91 along the Z-axis direction.

[0119] The elastic support group 74 is arranged on the pusher 70 and between the pusher 70 and the moving contactor group 72 along the X-axis direction. As shown, Figure 20The elastic support 93 is shown to include an elastic support body 94 and a first elastic part 95. The elastic support body 94 is fixed relative to the pusher 70. Specifically, the elastic support body 94 is provided with two first connecting holes 96 corresponding to the connecting columns 82, and the connecting columns 82 pass through the first connecting holes 96 so that the elastic support body 94 is positioned in any direction perpendicular to the X-axis direction relative to the pusher 70. The first elastic part 95 is adapted to elastically deform in the X-axis direction. The first elastic part 95 is provided corresponding to the movable contact 85, and 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 elastic support body 94, and the other end is fixedly connected to the overcurrent bridge 86. The position where the first elastic arm 97 is fixedly connected to the overcurrent bridge 86 is located at the back of the corresponding movable contact 87.

[0120] The elastic member 75 is adapted to abut against the accommodating member 6, and the elastic member 75 deforms to store energy when the pusher 70 moves in the disconnecting direction X2, and recovers to release energy when the pusher 70 moves in the closing direction X1. As shown in Figure 20 The elastic member 75 is shown to include a main body 98 and a second elastic part 99. The main body 98 is a sheet shape perpendicular to the X-axis direction and is fixed relative to the pusher 70. Specifically, the main body 98 is provided with two second connecting holes 100 corresponding to the connecting columns 82, and the connecting columns 82 pass through the second connecting holes 100 so that the main body 98 is positioned in any direction perpendicular to the X-axis direction relative to the pusher 70. The main body 98 is located between the elastic support body 94 and the first insert part 78 in the X-axis direction. The second elastic part 99 is adapted to elastically deform in the X-axis direction. The second elastic part 99 is provided corresponding to the movable contact 85 in the movable contact group 72. The second elastic part 99 includes two second elastic arms 101, one end of each of the two second elastic arms 101 is integrated with the main body 98, and the other end extends to the two sides of the Y-axis direction and is adapted to abut against the corresponding abutting surface 18.

[0121] Referring to Figure 21 and Figure 22 , Figure 21 and Figure 22 The limiting member 76 in this embodiment is shown. The limiting member 76 is fixed relative to the pusher 70, and abuts against the movable contact group 72 when the movable contact group 72 is disconnected from the stationary contact group 7 to limit the distance between the movable contact group 72 and the stationary contact group 7. As shown in Figure 21 and Figure 22The limiting member 76 is provided with a limiting body 102 and two first guide portions 103. The limiting body 102 is made of metal. The limiting body 102 is provided with a limiting portion 104 and two connecting portions 105. The limiting portion 104 is adapted to abut against each movable contact 85 in the movable contact group 72. The limiting portion 104 extends along the Z-axis direction and is provided with three avoiding holes 106 for the extension portions 92 of each movable magnetic conductor 90 to extend forward along the X-axis direction. The two connecting portions 105 extend backward from the two ends of the limiting portion 104 along the Z-axis direction respectively, and the connecting portion 105 is provided with an assembly hole 107 matched and fixed with the connecting end 84 and a bent portion 108 for mounting the first guide portion 103. The bent portion 108 extends from the front end of the connecting portion 105 along the closing direction X1 along the Z-axis direction. The extension directions of the 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 two 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 limiting body 102 by insert injection molding, and the first guide portion 103 wraps the corresponding bent portion 108. In this embodiment, the first guide portion 103 is located at the front end of the limiting member 76 along the closing direction X1 along the X-axis direction and at the middle part of the limiting member 76 along the Y-axis direction. In this embodiment, the first guide portion 103 and the second guide portion 78 are both guide portions 109. The guide portion 109 is used for guiding the movement of the movable contact part 4 along the X-axis direction.

[0122] Referring to Figure 1 , Figure 1 The micro switch 5 in this embodiment is shown. As Figure 1 shown, in this embodiment, the micro switch 5 includes a movable spring 83 and two static contact terminals 110. The static contact terminal 110 extends along the Z-axis direction and extends out of the accommodating member 6. The two static contact terminals 110 are arranged along the Y-axis direction and located between the movable spring 83 and the coil winding 41 along the X-axis direction. The two static contact terminals 110 are used for electrical connection with the relay state sensing circuit. The movable spring 83 is fixed with the pushing member 70. In this embodiment, the movable spring 83 is integrally formed with the pushing 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 pushing member 70 to move along the X-axis direction to abut or move away from the two static contact terminals 110. In other embodiments, when the movable spring 83 is not fixed with the pushing member 70, the movable spring 83 can also move away from the two static contact terminals based on the elastic restoring force of the movable spring 83 itself.

[0123] Referring to Figure 23 and Figure 26 , Figure 23 and Figure 26 The internal structure of the relay 1 in this embodiment is shown.

[0124] As Figure 23As shown, 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 part 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 extend out of the accommodating part 6 along the Y-axis direction. The second connecting terminal 35 of the second static contact 23 is located along the X-axis direction between each static contact point 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 also outside the right barrier 9. The static flux guide 8 is inserted into the static flux guide slot 16 and fixed to the accommodating part 6. The first static contact point 25 and the second static contact point 33 are respectively located on both sides of the static flux guide 8 along the Y-axis direction. The projection of the part of all the static contact points 20 adapted to contact the movable contact group 72 on the second projection plane perpendicular to the Y-axis direction is located within the projection of the static flux guide 8 on the second projection plane, and the surface of the static flux guide 8 facing the movable flux guide group 73 is closer to the movable flux guide group 73 along the X-axis direction than all the static contact points 20. The second surface S2 is closer to the movable flux guide group 73 than the first surface S1. The static flux guide 8 is oppositely arranged along the X-axis direction to the movable flux guide group 73. The static flux guide 8 is located along the X-axis direction between the third overcurrent part 27 and the movable flux guide group 73. In other embodiments, the static flux guide 8 can also be fixed relative to the limiting part 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 part 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 part 76 is fixed to the connecting part 71 to be fixed relative to the pushing part 70. The limiting part 76 is adapted to abut against the movable contact group 72 along the disconnection direction X2. The elastic part 75 is adapted to abut against the accommodating part 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.

[0125] As Figure 26As shown, the housing 10 and the cover 11 are fixedly connected to form the receiving member 6. The shielding cover 39 is placed inside the receiving member 6. The first guide portion 103 located at the upper part along the Z-axis extends into the first groove segment 14 of the slide groove 13 of the cover 11 along the Z-axis. The second guide portion 78 located at the upper part along the Z-axis extends into the second groove segment 15 of the slide groove 13 of the cover 11 along the Z-axis. The first guide portion 103 located at the lower part along the Z-axis extends into the first groove segment 14 of the slide groove 13 of the housing 10 along the Z-axis. The second guide portion 78 located at the lower part along the Z-axis extends into the second groove segment 15 of the slide groove 13 of the housing 10 along the Z-axis. Thus, each guide portion 109 extends into the corresponding slide groove 13 along the Z-axis and slides in cooperation with the slide groove 13 along the X-axis. In this embodiment, the guide portion 109 is provided in the moving contact portion 4, and the slide groove 13 is provided in the receiving member 13. In other embodiments, the guide portion 109 may be disposed on the receiving member 6, and the slide groove 13 may be disposed on the movable contact portion 4.

[0126] See Figure 23 , Figure 23 The state of relay 1 is shown when the armature assembly 38 is in the first position. (Example) Figure 23 As shown, when the armature assembly 38 is in the first position, the moving contact group 72 and the stationary contact group 7 are disconnected along the disconnection direction X2, the relay 1 is in the off state, and the external circuit is turned off. At this time, the elastic element 75 abuts against the contact surface 18 along the disconnection direction X2, causing the elastic element 75 to deform and store energy. The limiting member 76 abuts against the moving contact group 72 along the disconnection direction X2, and each moving contact 85 presses against the elastic support group 74, fixing the frame 94 of the elastic support 93 and the body 98 of the elastic element 75 relative to the pushing member 70 along the X-axis direction, thereby fixing the frame 94 and the elastic element 75 relative to the pushing member 70. The moving 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.

[0127] When the coil winding 41 receives the first pulse electrical signal, the coil assembly 37 drives the armature assembly 38 to move along the closing direction X1. The armature assembly 38 then drives the moving contact portion 4 to move along the closing direction X1. During this process, the guide portion 109 slides in the groove 13 along the closing direction X1 and guides the moving contact portion 4. The elastic element 75 recovers its deformation and releases energy. When the moving contact 87 abuts against the corresponding stationary contact 20, the pusher 70 enters overtravel mode. At this time, the elastic support group 74 deforms and stores energy until the armature assembly 38 reaches the second position, at which point the moving contact group 72 and the stationary contact group 7 close.

[0128] See Figure 24 and Figure 26 , Figure 24 and Figure 26 The state of relay 1 is shown when the armature assembly 38 is in the second position. (Example) Figure 24As shown, when the armature assembly 38 is in the second position, the movable contact group 72 is closed with the stationary contact group 7 along the closing direction X1, the relay 1 is in the on state, and the external circuit is turned on. The third overcurrent part 27 of the first stationary contact 22 forms a reverse current part, and the overcurrent direction of the reverse current part is opposite to the overcurrent direction of the overcurrent bridge 86. The eighth overcurrent part 34 of the second stationary contact 23 forms a cross current part, and the overcurrent direction of the cross current part 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 part is located on the right side of the overcurrent bridge 86. The magnetic field formed by the current passing through the cross current part acts on the overcurrent bridge 86 with current, 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 deforms along the X-axis direction to store energy. The elastic member 75 moves away from the abutting surface 18 along the X-axis direction. The movable spring 83 moves 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. 6, the movable contact group 72 is closed with the stationary contact group 7 along the closing direction X1, and the relay 1 is in the on state. Figure 26 As shown, 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 part formed by the third overcurrent part 27 is in the same direction as the magnetic induction lines formed by the anti-short-circuit magnetic loop M1 on one side of the stationary magnetic conductor 8.

[0129] When the coil assembly 37 drives the armature assembly 38 to move along 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 along the opening direction X2. During this process, the guide part 109 slides in the sliding groove 13 along 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 deforms to store energy after abutting against the abutting surface 18. Until it returns to the state shown in FIG. 4. Figure 23 As shown, the armature assembly 38 is in the first position.

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

[0131] 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 that 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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 beneficial to make 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.

[0137] 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 beneficial to avoid the destructive arc caused by the separation of the movable contact set 72 from the static contact set 7 due to the fault large current.

[0138] In the embodiment, when the coil assembly 37 is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed, in the case that the armature assembly 38 is in the magnetic holding state at the first position, not only the two magnetic driving ends 45 generate magnetic repulsion on the first attracting portion 61 and the third attracting portion 63, but also a first part of the pushing magnetic circuit without any air gap is formed between the fourth attracting portion 64 and the second attracting portion 62 through the armature assembly 38, and a second part of the pushing magnetic circuit through the entire coil assembly 37 is formed by the two magnetic driving ends 45 through the coil assembly 37, the first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit, which only has a certain stroke air gap and no other air gap, thus the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends 45 acting on the armature assembly 38 is stronger under the same power consumption, which is more beneficial to increase 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] In the embodiment, the two movable contact points 87 of the movable contact 85 are arranged along the Y-axis direction and fixed to the overcurrent bridge 86 extending along the Y-axis direction, so that the current passing through the overcurrent bridge 86 flows along the Y-axis direction, facilitating the formation of a magnetic loop for resisting short circuit, and the short circuit resistance 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.

[0143] 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.

[0144] 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.

[0145] 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, so as to avoid the destructive pull arc causing damage to the relay 1.

[0146] 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, so as to avoid the destructive pull arc causing damage to the relay 1.

[0147] 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.

[0148] 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.

[0149] In the embodiment, the static contact 20 of each static contact 19 is located on the two sides of the static magnetic conductor 8 along the Y-axis direction, so that the magnetic force formed by the anti-short-circuit magnetic loop M1 formed by the static magnetic conductor 8 and the moving magnetic conductor group 73 on the moving contact group 72 is more balanced along the Y-axis direction, and each moving contact 87 is less likely to be separated from the corresponding static contact 20.

[0150] In the embodiment, the overcurrent direction of the backflow part is opposite to the overcurrent direction of the overcurrent bridge 86, and the static magnetic conductor 8 is located between the backflow part and the moving magnetic conductor group 73 along the X-axis direction, so that the magnetic field generated by the backflow part on the side where the static magnetic conductor 8 is located has the same direction as the magnetic field generated by the anti-short-circuit magnetic loop M1 on the side where the static magnetic conductor 8 is located, the magnetic field strength of the static magnetic conductor 8 is strengthened, the magnetic force between the static magnetic conductor 8 and the moving magnetic conductor group 73 is stronger, and 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.

[0151] In the embodiment, the second surface S2 is closer to the moving magnetic conductor group 73 along the X-axis direction than the first surface S1, so that the static magnetic conductor 8 is not embedded between the portions of the two static contacts 19 other than the static contact 20 along the Y-axis direction, the creepage distance between the static contact 19 and the static magnetic conductor 8 is increased, and the withstand voltage capability of the relay 1 is improved. At the same time, it is also beneficial to reduce the distance between the two static contacts 20 along the Y-axis direction, and beneficial to reduce the size of the accommodating member 6 along the Y-axis direction, so as to create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0152] In the embodiment, the projections of the portions of all the static contacts 20 adapted to contact the moving contact group 72 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of the static flux guide 8 on the second projection plane, and the surface of the static flux guide 8 facing the moving flux guide group 73 is closer to the moving flux guide group 73 than all the static contacts 20 along the X-axis direction. Therefore, when the moving contact group 72 breaks the arc from the static contact group 7, the magnetic field generated by the two side arcs concentrates on the static flux guide 8, so that the arc is not easy to spread to the two sides along the Y-axis direction, the arc escaping between the moving contact 87 and the static contact 20 can reduce the ablation of the surrounding housing 6, and the service life of the relay 1 is ensured. On this basis, the distance between the two static contacts 20 along the Y-axis direction can be designed to be closer, which is beneficial to reducing the size of the housing 6 along the Y-axis direction, and can create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0153] In the embodiment, the two blocking pieces 9 are fixed to the housing 6 and located outside the static contact group 7 along the Y-axis direction. Each blocking piece 9 extends along the X-axis direction, so that the projections of the portions of all the static contacts 20 adapted to contact the moving contact 87 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of each blocking piece 9 on the second projection plane. Therefore, when the moving contact group 72 breaks the arc from the static contact group 7, the arc will not conduct to the two side walls of the housing 6 along the Y-axis direction, ensuring the insulation performance of the housing 6. The blocking piece 9 is made of high-temperature-resistant insulating material, which can prevent the heat of the arc from damaging the blocking piece 9 when the load is large and the arc generates a lot of heat, avoiding the damage of the blocking piece 9, and is beneficial to improving the load capacity of the relay 1.

[0154] In the embodiment, the elastic support group 74 is arranged between the pushing piece 70 and the moving contact group 72, which can provide an elastic force to the moving contact group 72 along the closing direction X1 after the pushing piece 70 experiences overtravel, so that the moving contact group 72 can be more reliably closed with the static contact group 7. When the relay 1 bears a fault current, the moving contact group 72 is less likely to be separated from the static contact group 7, thereby avoiding the damage of the relay 1 caused by destructive arc breaking. The elastic support group 74 can also generate an additional repulsive force when the moving contact group 72 breaks from the static contact group 7, which helps the moving contact 85 to disconnect with the static contact group 7.

[0155] In the embodiment, by arranging the limiting piece 76, the distance between the moving contact group 72 and the static contact group 7 when the moving contact group 72 is disconnected from the static contact group 7 can meet the design requirements.

[0156] In the embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, which avoids the errors that may be generated in the assembly process of the armature assembly 38 and the pushing piece 70, and 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.

[0157] 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.

[0158] 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.

[0159] 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 overcurrent bridge 86 are respectively located on the back surface of the corresponding movable contact point 87, so that the elastic force of the two first elastic arms 97 can directly act 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.

[0160] 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.

[0161] In the embodiment, the main body 98 of the elastic piece 75 is in a sheet shape and is fixed relative to the push piece 70, and the second elastic arm 101 extends to both sides of the Y-axis direction and is adapted to abut against the accommodating piece 6, so that the elastic piece 75 occupies less space along the X-axis direction and has good elastic deformation capability, avoiding that the compression length of the spring increases the size of the movable contact portion 4 along the X-axis direction when the spring is used as the elastic piece 75, thereby being conducive to reducing the size of the relay 1 along the X-axis direction, and thus more favorable conditions can be created for increasing the safety distance between the movable contactor group 72 and the static contactor group 7 in a limited space.

[0162] In the embodiment, the guide part 109 is arranged in the middle along the Y-axis direction, compared with the guide part 109 arranged on both sides along the Y-axis direction, the space along the Y-axis direction can be saved, the size of the relay 1 along the Y-axis direction is avoided to increase, at the same time, the phenomenon that the movable contact part 4 is stuck when moving due to the guide part 109 on both sides along the Y-axis direction is not parallel can be avoided, the magnetic driving force of the magnetic circuit part 3 is not easy to waste on useless work, and more favorable conditions can be created for increasing the safety distance between the movable contact group 72 and the static contact group 7 in the limited space.

[0163] In the embodiment, the limiting part 76 abuts against the movable contact group 72 before the pushing part 70 moves into the overstroke along the closing direction X1, and when entering the overstroke, the movable contact point 87 has abutted against the corresponding static contact point 20, so that the first guide part 103 is arranged on the limiting part 76, the movement of the movable contact 85 along the X-axis direction can be better guided, the movable contact point 87 can correctly abut against the static contact point 20 along the X-axis direction, the contact resistance between the movable contact point 87 and the static contact point 20 is reduced, and the time of pulling the arc when the movable contact point 87 and the static contact point 20 are disconnected is shortened, which is beneficial to increase the service life of the movable contact 72 and the static contact 20. This is because the guide part 109 and the sliding groove 13 are slidably connected along the X-axis direction, and a matching gap is inevitably formed between the two. If the guide part 109 is far away from the movable contact 72 along the X-axis direction, the matching gap will be enlarged during the movement of the movable contact 72, so that the movable contact point 87 cannot correctly abut against the static contact point 20 along the X-axis direction, thereby increasing the contact resistance between the movable contact point 87 and the static contact point 20, and the time of pulling the arc when the movable contact point 87 and the static contact point 20 are disconnected is longer, which is not conducive to the service life of the movable contact point 87 and the static contact point 20.

[0164] In the embodiment, the first guide part 103 is arranged on the limiting part 76, which means that the sliding groove 13 is arranged on the accommodating part 6. Since the static contact group 7 is fixedly connected to the accommodating part 6, arranging the sliding groove 13 on the accommodating part 6 is beneficial to ensure that the extension direction of the sliding groove 13 is perpendicular to the arrangement direction of the static contact points 20 of the two static contacts 19, so that the sliding groove 13 can guide the guide part 109 along the X-axis direction more accurately.

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

[0166] In the embodiment, the projection of the first guide part 103 on the first projection surface is circular, which is beneficial to avoid the sliding fit between the first guide part 103 and the sliding groove 13 from being stuck.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] In the embodiment, whether the first slot segment 14 and the second slot segment 15 are connected or not, since both of them are formed in the accommodating part 6, the sliding groove 13 can be ensured to extend along the X-axis direction.

[0172] 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.

[0173] 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 pushing member 70 and the coil winding 41, avoid increasing the size of the accommodating member 6 along the Y-axis direction when the static contact terminal 110 is arranged outside the winding assembly 37 along the Y-axis direction, and create more favorable conditions for increasing the safety distance of the moving contact group 72 and the static contact group 7 in limited space. The moving spring 83 is fixedly connected with the pushing member 70, so that the position and action of the moving spring 83 are more determined.

[0174] In this embodiment, the magnetic field of the coil assembly 37 is compressed in the iron core 43 and the yoke 44 by arranging the shielding cover 39, 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 of 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.

[0175] Embodiment Two

[0176] Embodiment Two is different from Embodiment One in the magnetic circuit part 3. The remaining parts are basically the same as Embodiment One.

[0177] 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.

[0178] Referring to Figures 27 to 30 , Figure 27 and Figure 30 The armature assembly 38 in Embodiment Two is shown. As Figure 27 and Figure 28As shown, in the embodiment, the number of permanent magnets 50 is one. The two magnetic poles 54 of the permanent magnet 50 are arranged along the Z-axis direction. The two armatures 51 are respectively fixed to the two magnetic poles 54 of the permanent magnet 50 and correspond to one polarity respectively, and each is provided with two attracting 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 perpendicular to the Z-axis direction and are in the shape of a plate. The two attracting portions 60 of each armature 51 extend from the fixed portion 111 along the Z-axis direction. Here, the "attracting portions 60 extend from the fixed portion 111 along the Z-axis direction" means that the attracting portions 60 as a whole extend from the edge of the fixed portion 111 along the Z-axis direction. Specifically, the first attracting portion 61 and the second attracting 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 attracting portion 63 and the fourth attracting 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 112, and are each spaced apart from the permanent magnet 50 along the X-axis direction. In the embodiment, the armatures 51 are each bent from a plate or sheet material, the intersection of the attracting portions 60 and the fixed portion 111 forms a first dimension along the Y-axis direction, the fixed portion 111 is fixed to the magnetic pole 54 of the permanent magnet 50 at 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 the embodiment, the two are equal, and greater than 0.8.

[0179] As Figure 28 and Figure 29As shown, the top end of each suction part 60 along its extending direction forms a suction part avoiding structure 115, and the fixed part 111 of each armature 51 corresponds to two suction part avoiding structures 115 of another armature 51 to form a fixed part avoiding structure 114, wherein the extending direction of the suction part 60 of each armature 51 refers to the direction of the suction part 60 along the Z-axis direction from the fixed part 111 to the fixed part 111 of another armature 51, and the top end of the suction part 60 along its extending direction refers to the end of the suction part 60 along the Z-axis direction close to the fixed part 111 of another armature 51. Through the suction part avoiding structure 115 and the fixed part avoiding structure 114, the top end of each suction part 60 of each armature 51 and the fixed part 111 of another armature 51 are spaced apart along the X-axis direction and the Y-axis direction. In this embodiment, the fixed part avoiding structure 114 is a fixed part missing corner, and in this embodiment, the fixed part missing corner is formed by the fixed part 111 by setting a slope parallel to the Z-axis direction, and in other embodiments, the fixed part missing corner can also have other shapes. In this embodiment, the suction part avoiding structure is a suction part missing corner, and in this embodiment, the suction part missing corner is formed by the suction part 60 by setting a slope parallel to the X-axis direction, and in other embodiments, the suction part missing corner can also have other shapes.

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

[0181] Specifically, the first fixing portion avoidance structure 116 and the third suction portion avoidance structure 122 are correspondingly arranged so that the top ends of the first fixing portion 112 and the third suction portion 63 are spaced apart along both the X-axis and Y-axis directions. The second fixing portion avoidance structure 117 and the fourth suction portion avoidance structure 123 are correspondingly arranged so that the top ends of the first fixing portion 112 and the fourth suction portion 64 are spaced apart along both the X-axis and Y-axis directions. The third fixing portion avoidance structure 118 and the second suction portion avoidance structure 121 are correspondingly arranged so that the top ends of the second fixing portion 113 and the second suction portion 62 are spaced apart along both the X-axis and Y-axis directions. The fourth fixing portion avoidance structure 119 and the first suction portion avoidance structure 120 are correspondingly arranged so that the top end of the second fixing portion 1132 and the first suction portion 61 are spaced apart along both the X-axis and Y-axis directions.

[0182] like Figure 30As shown, the top end of the attraction portion 60 of each armature 51 is flush with the surface where the fixed portion 111 of the other armature 51 and the magnetic pole 54 of the permanent magnet 50 are fixed in the extension direction of the attraction portion 60. In other embodiments, the top end of the attraction portion 60 of each armature 51 can exceed the surface where the fixed portion 111 of the other armature 51 and the magnetic pole 54 of the permanent magnet 50 are fixed in the extension direction of the attraction portion 60.

[0183] The magnetic circuit portion 3 in this embodiment has substantially the same operating principle as the magnetic circuit portion 3 in Embodiment One. In this embodiment, the projection of the armature assembly on a first projection plane perpendicular to the Z-axis direction is mirror-symmetric along a symmetry plane perpendicular to the Y-axis.

[0184] Referring to Figure 31 , Figure 31 The shielding cover 39 in this embodiment is shown. As Figure 29 shown, the shielding cover 39 is fixed to the outer surface of the accommodating member 6 and covers the coil winding 41 outside in the Z-axis direction and the X-axis direction.

[0185] Embodiment Two is a further improvement of Embodiment One. In Embodiment One, the permanent magnets 50 located on both sides of the portion 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 magnetized the first time can be demagnetized when magnetized the second time, resulting in poor consistency of the magnetic parameters of the permanent magnets 50 on both sides. In this 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 one magnetization can be completed, thus solving the above two problems well, which is conducive to ensuring the consistency of the magnetic field strength of the attraction portions 60 on both sides of the armature assembly 38 along the Y-axis direction, and also 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.

[0186] In this embodiment, the attraction portion 60 extends from the fixed portion 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 portion 111 and the attraction portion 60.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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 cross section and reducing the magnetic efficiency due to the inconsistent extension directions of the attraction part 60 and the fixed part 111 and the large difference between the first size and the second size.

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

[0195] 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.

[0196] In the embodiment, the projection of the armature assembly 38 on the first projection plane is mirror symmetric 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.

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

Claims

1. A magnetic circuit portion, characterized by, The magnet assembly comprises a coil assembly and an armature assembly; the coil assembly is provided with two magnetic driving ends arranged along the Y-axis direction; 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 and correspond to one polarity respectively, and each of the two armatures is provided with two attracting portions, each of the attracting portions is adapted to 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 positions of the two armatures in the X-axis direction and drive the armature assembly to move along the X-axis direction.

2. A magnetic circuit portion as claimed in claim 1, characterized in that Each of the armatures is provided with a fixed portion fixedly connected with the magnetic pole of the permanent magnet, and the two attracting portions extend from the fixed portion along the Z-axis direction.

3. A magnetic circuit portion as claimed in claim 2, characterized in that The top end of each of the attracting portions along the extending direction of the attracting portion forms an attracting portion avoiding structure, and the fixed portion of each of the armatures forms a fixed portion avoiding structure corresponding to the attracting portion avoiding structures of the two attracting portions of the other armature; through the attracting portion avoiding structure and the corresponding fixed portion avoiding structure, the top end of each of the attracting portions of each of the armatures and the fixed portion of the other armature form a space along the X-axis direction and the Y-axis direction.

4. A magnetic circuit portion as claimed in claim 3, characterized in that The fixed portion avoiding structure is a fixed portion notch, and the attracting portion avoiding structure is an attracting portion notch.

5. A magnetic circuit portion as claimed in claim 4, characterized in that The fixed portion notch is formed by arranging a slope parallel to the Z-axis direction on the fixed portion, and the attracting portion notch is formed by arranging a slope parallel to the X-axis direction on the attracting portion.

6. A magnetic circuit portion according to any one of claims 3 to 5, characterized in that The top end of each of the attracting portions of each of the armatures is flush with or exceeds the surface where the fixed portion of the other armature is fixedly connected with the magnetic pole of the permanent magnet along the extending direction of the attracting portion.

7. A magnetic circuit section as claimed in claim 2, characterized in that Both of the armatures are bent from a plate or a sheet.

8. A magnetic circuit portion as claimed in claim 2, characterized in that The size of the attracting portion and the fixed portion along the Y-axis direction is a first size; the size of the fixed portion fixedly connected with the magnetic pole of the permanent magnet along the X-axis direction is a second size; the ratio of the first size to the second size is between 0.6 and 1.

4.

9. A magnetic circuit portion as claimed in claim 1, characterized in that The number of the permanent magnets is at least two, and the magnetic pole polarity directions of the permanent magnets are the same.

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

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

12. A magnetic circuit section as claimed in claim 1, characterized in that: 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.

13. A magnetic circuit portion as claimed in claim 12, characterized in that 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.

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 with the core at one end and form the magnetic driving ends at the other end.

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

16. An electricity meter, characterised in that, The magnetic holding relay comprises the magnetic holding relay as claimed in claim 15.

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