Relay and electric meter

Abstract

Disclosed in the present application are a relay and an electric meter. The relay comprises a fixed part (2) and a movable contact part (4); the fixed part (2) comprises an accommodation part (6) and a stationary contact set (7) which are fixedly connected to each other; the movable contact part (4) can move in an X-axis direction relative to the fixed part (2) and comprises a movable contact set (72); the movable contact set (72) is engaged with or disengaged from the stationary contact set (7) in the X-axis direction; of the accommodation part (6) and the movable contact part (4), one is provided with sliding slots (13), and the other is provided with guide portions (100); the sliding slots (13) extend in the X-axis direction, and the guide portions (100) extend into the sliding slots (13) in a Z-axis direction so as to be in sliding fit with the sliding slots (13) in the X-axis direction.

Description

A relay and an electric meter

[0001] Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410480442.4, filed on April 19, 2024, and entitled “A Relay”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

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

[0004] The relay in the related art comprises a fixed part, a movable contact part, and a magnetic circuit part. The fixed part comprises a housing and a static contact group, and in an optional configuration, the static contact group comprises two static contacts fixed to the housing and connected to a power supply and a load of an external circuit respectively. Each static contact is provided with a static contact point, and the static contact points of the two static contacts are arranged along the Y-axis direction. In this configuration, the movable contact part comprises a pusher, a movable contact group, an elastic support group, and a limiting piece. The pusher is generally formed by plastic injection molding to electrically isolate the magnetic circuit part and the movable contact group from each other, and the pusher moves along the X-axis direction to drive the movable contact group to close or disconnect with the static contact group along the X-axis direction. The movable contact group generally comprises at least one movable contact, and the movable contact is provided with an overcurrent bridge and two movable contact points. The two movable contact points are arranged along the Y-axis direction and are fixed to the overcurrent bridge. The two movable contact points abut against the static contact points on the corresponding static contact along the closing direction and move away from the static contact points on the corresponding static contact along the disconnecting direction. The closing direction and the disconnecting direction are both the X-axis direction and are opposite to each other. The elastic support group is arranged along the X-axis direction between the pusher and the movable contact group. It stores energy when the movable contact group closes with the static contact group, and releases energy when the movable contact group disconnects from the static contact group. The limiting piece is fixed relative to the pusher and abuts against the movable contact group along the disconnecting direction when the movable contact group disconnects from the static contact group, so as to limit the distance between the movable contact points and the static contact points. The magnetic circuit part is used to drive the pusher to move along the X-axis direction. The magnetic circuit part in the related art can have a magnetic holding function, which can reduce the energy consumption of the relay. The magnetic circuit part with the magnetic holding function can have two types of swing type and straight type. The swing type 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, an iron core, and two yokes. The iron core is arranged in the coil winding, and the two yokes are fixed to the two ends of the iron core. The ends of the two yokes away from the iron core form two magnetic driving ends, and the two magnetic driving ends are arranged along a first direction. The armature assembly comprises a permanent magnet and two armatures, and the permanent magnet and the two armatures are arranged in a I-shaped manner. The two armatures are parallel to each other and sandwich the permanent magnet therebetween. The coil winding is excited by a pulse electric 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 armature assembly drives the pusher to move along the X-axis direction through a swing arm. The straight type 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, and the armature moves linearly relative to the housing between the yoke plate and the static iron core. The armature is generally fixed to the pusher to drive the pusher to move along the X-axis direction.

[0005] Generally, the surfaces of the parts of the moving contact and the stationary contact that are in contact with each other are substantially spherical or spherical-like. If the moving contact and the stationary contact are misaligned with each other in the Y-axis direction and / or the Z-axis direction, the contact parts of the moving contact and the stationary contact when in contact with each other can not be at the top ends of the moving contact and the stationary contact, which can increase the contact resistance between the moving contact and the stationary contact and can also make the moving contact not fast enough to break away from the stationary contact, resulting in a longer arc breaking time and being detrimental to the service life of the moving contact and the stationary contact. To solve this problem, the relay generally includes two guide rods on both sides of the moving contact part in the Y-axis direction, the guide rods extend in the X-axis direction, one of the moving contact part and the housing is fixedly connected with the guide rods, and the other of the moving contact part and the housing is in sliding fit with the guide rods in the X-axis direction. The guiding effect of the above guide structure is not ideal. SUMMARY

[0006] According to various embodiments of the present application, the purpose of the present application is to overcome the above-mentioned defects or problems existing in the background art, and to provide a relay and an electric meter with a better guiding effect than the prior art.

[0007] According to various embodiments of the present application, a relay is provided, which includes a fixed part including a housing and a stationary contact group fixedly connected with each other, and a moving contact part capable of moving relative to the fixed part in an X-axis direction and including a moving contact group, the moving contact group being closed or disconnected with the stationary contact group in the X-axis direction; one of the housing and the moving contact part is provided with a sliding groove, and the other is provided with a guide part; the sliding groove extends in the X-axis direction, the guide part extends into the sliding groove in the Z-axis direction, and the guide part and the sliding groove are in sliding fit in the X-axis direction.

[0008] According to some embodiments of the present application, the stationary contact group includes two stationary contacts; the moving contact group includes a moving contact provided with an overcurrent bridge and a moving contact point, the overcurrent bridge is provided with the moving contact point at both ends in the Y-axis direction, the two moving contact points can be in contact with the corresponding stationary contacts in a closing direction, and the two moving contact points can be away from the corresponding stationary contacts in a disconnecting direction, the closing direction and the disconnecting direction are both the X-axis direction; the guide part is centrally located between the two moving contact points of the moving contact in the Y-axis direction.

[0009] According to some embodiments of the present application, the moving contact part further includes a pushing member, an elastic support group, and a limiting member; the pushing member moves in the X-axis direction to drive the moving contact group to close or disconnect with the stationary contact group in the X-axis direction; the elastic support group is arranged between the pushing member and the moving contact group in the X-axis direction; the limiting member is fixed relative to the pushing member and abuts against the moving contact group in the disconnecting direction when the moving contact group is disconnected with the stationary contact group; the guide part includes a first guide part, and the first guide part is arranged on the limiting member.

[0010] According to some embodiments of the present application, the limiting member is further provided with a limiting body fixedly connected with the first guide part, the limiting body is an integral structure with the two connecting parts and the limiting part, the limiting part is capable of abutting against the overflow bridge, and the two connecting parts respectively extend from two ends of the limiting part along the Z-axis direction in a disconnecting direction and are connected with the pushing member.

[0011] According to some embodiments of the present application, the moving contact part further comprises a connecting member, the connecting member is integrally formed with the pushing member by insert injection molding, the connecting member extends along the Z-axis direction, two ends of the connecting member respectively extend out of the pushing member to form two connecting ends, and the two connecting parts are respectively connected with the two connecting ends.

[0012] According to some embodiments of the present application, the number of the first guide parts is two, and the number of the sliding grooves is two; the two first guide parts respectively extend into the corresponding sliding grooves from the limiting body along the Z-axis direction away from each other, and the two first guide parts are arranged along the Z-axis direction.

[0013] According to some embodiments of the present application, the first guide part is located at the front part of the limiting body along the closing direction.

[0014] According to some embodiments of the present application, a projection of the first guide part on a first projection plane perpendicular to the Z-axis direction is circular.

[0015] According to some embodiments of the present application, the material of the first guide part is plastic, the material of the limiting body is metal, and the first guide part is integrally formed with the limiting body by insert injection molding or is bonded or screw-connected with the limiting body.

[0016] According to some embodiments of the present application, the guide part further comprises a second guide part, and the second guide part is arranged on the pushing member.

[0017] According to some embodiments of the present application, the pushing member further comprises a pushing body, the number of the second guide parts is two, the two second guide parts respectively extend into the corresponding sliding grooves from the pushing body along the Z-axis direction away from each other, and the two second guide parts are arranged along the Z-axis direction.

[0018] According to some embodiments of the present application, a projection of the second guide part on a first projection plane perpendicular to the Z-axis direction is circular.

[0019] According to some embodiments of the present application, each of the sliding grooves is divided into a first groove segment capable of slidingly engaging with the first guide portion and a second groove segment capable of slidingly engaging with the second guide portion; the first groove segment and the second groove segment are connected or separated along the X-axis direction.

[0020] According to some embodiments of the present application, the first guide portion and the sliding grooves form a first engaging gap along the Y-axis direction, and the second guide portion and the sliding grooves form a second engaging gap along the Y-axis direction, the first engaging gap having a size different from that of the second engaging gap.

[0021] According to some embodiments of the present application, the first engaging gap is smaller than the second engaging gap.

[0022] According to some embodiments of the present application, a magnetic circuit portion is included, which comprises:

[0023] an armature assembly fixedly connected with the pusher and comprising a permanent magnet and two armatures, the two armatures being fixedly connected with two magnetic poles of the permanent magnet, respectively; and

[0024] a coil assembly provided with two magnetic driving ends, the coil assembly being 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.

[0025] According to some embodiments of the present application, each of the armatures is provided with two attraction portions arranged along the X-axis direction, the two attraction portions being arranged corresponding to the two magnetic driving ends, respectively, and capable of attracting the corresponding magnetic driving end along the X-axis direction.

[0026] According to some embodiments of the present application, the projections of the two armatures on a first projection plane perpendicular to the Z-axis direction cross each other; the two magnetic driving ends are arranged along the Y-axis direction.

[0027] According to some embodiments of the present application, the two armatures are a first armature and a second armature, respectively, the two attraction portions of the first armature are a first attraction portion and a second attraction portion, respectively, and the two attraction portions of the second armature are a third attraction portion and a fourth attraction portion, respectively; the armature assembly moves along the X-axis direction between a first position and a second position; in the first position, the first attraction portion and the third attraction portion attract the two magnetic driving ends, respectively, so as to disconnect the movable contactor group from the stationary contactor group; in the second position, the fourth attraction portion and the second attraction portion attract the two magnetic driving ends, respectively, so as to close the movable contactor group and the stationary contactor group.

[0028] According to some embodiments of the present application, an electric meter is provided, comprising the relay in any of the above embodiments.

[0029] Compared with the prior art, the above scheme has the following beneficial effects:

[0030] In the prior art, the guide rod is in sliding fit with one of the moving contact part and the accommodating part. Since the guide rod extends along the X-axis direction and the moving contact group moves along the X-axis direction, the part of the guide rod in sliding fit is relatively long along the X-axis direction and is prone to flexural deformation, which makes the guiding effect unsatisfactory. In the present application, the guiding part extends into the sliding groove along the Z-axis direction to be in sliding fit with the sliding groove along the X-axis direction. Since the part of the guiding part in sliding fit extends perpendicular to the moving direction of the moving contact group, the part of the guiding part in sliding fit is much shorter than that in the prior art and is not prone to flexural deformation, and the guiding effect is better than that in the prior art. On this basis, the size of the fit surface of the guiding part in sliding fit with the sliding groove along the Y-axis direction can be shortened as much as possible to reduce the friction and make the driving force of the required magnetic circuit part smaller, so that the volume of the magnetic circuit part can be reduced, which is conducive to the miniaturization of the relay.

[0031] In the present application, the two moving contact points are adapted to abut or move away from the corresponding stationary contact along the X-axis direction. Under this structure, the safety distance between the moving contact group and the stationary contact group is twice the actual distance of the moving contact point from the corresponding stationary contact along the X-axis direction, so that 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 stationary contact group.

[0032] In the present application, the guiding part is centrally arranged along the Y-axis direction, which can save space along the Y-axis direction compared with arranging the guide rods on both sides along the Y-axis direction, and avoid increasing the size of the relay along the Y-axis direction. At the same time, it can avoid the phenomenon that the moving contact part is stuck during movement due to the non-parallelism of the guide rods on both sides along the Y-axis direction, so that the magnetic driving force of the magnetic circuit part is not easily wasted on useless work, thereby reducing the energy consumption of the coil assembly.

[0033] In the present application, the elastic support group is arranged between the pushing piece and the moving contact group, which can provide an elastic force to the moving contact group along the closing direction after the pushing piece experiences overstroke, so that the moving contact group can be more reliably closed with the stationary contact group. When the relay bears a fault current, the moving contact group is less likely to be separated from the stationary contact group, thereby avoiding destructive arc drawing to damage the relay. The elastic support group can also generate an additional repulsive force when the moving contact group is separated from the stationary contact group, which helps to separate the moving contact and the stationary contact group.

[0034] In the present application, the first guide part is arranged on the limiting part, which means that the sliding groove is arranged on the accommodating part. Since the static contact group is fixedly connected to the accommodating part, arranging the sliding groove on the accommodating part is conducive to ensuring that the extension direction of the sliding groove is perpendicular to the arrangement direction of the static contact points of the two static contacts, so that the sliding groove guides the guide part along the X-axis direction more accurately.

[0035] In the present application, since the limiting part abuts against the moving contact group before the pushing part moves into the overstroke along the closing direction, and when the moving contact point has abutted against the corresponding static contact point when entering the overstroke, arranging the first guide part on the limiting part can better guide the moving contact to move along the X-axis direction, so that the moving contact point correctly abuts against the static contact point, reduces the contact resistance between the moving contact point and the static contact point, and also shortens the time length of the electric arc drawn when the moving contact point and the static contact point are disconnected, which is conducive to increasing the service life of the moving contact point and the static contact point. This is because the guide part and the sliding groove slide along the X-axis direction, and a cooperation gap is inevitably formed between them. If the distance between the guide part and the moving contact along the X-axis direction is far, the cooperation gap will be enlarged by the movement of the moving contact, so that the moving contact point cannot correctly abut against the static contact point, thereby increasing the contact resistance between the moving contact point and the static contact point, and also making the time of drawing the electric arc longer when the moving contact point is disconnected from the static contact point, which is not conducive to the service life of the moving contact point and the static contact point.

[0036] In the present application, the connecting part and the pushing part are integrally formed by insert injection molding, so that the limiting part is more easily fixed relative to the pushing part, and the limiting part is more rigid, has a better limiting effect on the moving contact group, and can also save the size of the relay along the Y-axis direction; the two ends of the connecting part along the Z-axis direction respectively protrude out of the pushing part to form the connecting end fixedly connected with the limiting part, which can save the size of the relay along the Z-axis direction, and can create more favorable conditions for increasing the safety distance between the moving contact group and the static contact group in a limited space.

[0037] In the present application, the two first guide parts protrude into the corresponding sliding grooves from the limiting body along the Z-axis direction away from each other, which can support the limiting part by the side wall of the sliding groove along the Y-axis direction when the Y-axis direction is the direction of gravity, and can avoid the limiting part from deflecting in a plane perpendicular to the X-axis direction, which is conducive to ensuring that the moving contact point correctly abuts against the static contact point along the X-axis direction.

[0038] In the present application, the first guide part is located at the front part of the limiting body along the closing direction, so that the first guide part is closer to the moving contact point along the X-axis direction, which is more conducive to the moving contact point correctly abutting against the static contact point along the X-axis direction, reducing the contact resistance between the moving contact point and the static contact point, and also shortening the time length of the electric arc drawn when the moving contact point and the static contact point are disconnected, which is conducive to increasing the service life of the moving contact point and the static contact point.

[0039] In the present application, the projection of the first guide part on the first projection plane is circular, which is conducive to reducing the sliding friction between the first guide part and the sliding groove along the X-axis direction and avoiding the sliding cooperation between the first guide part and the sliding groove from being jammed.

[0040] In the application, the material of the first guide part is plastic, which is beneficial to avoid scratching the plastic material of the accommodating part when the first guide part is made of metal, thereby preventing the contact resistance between the moving contact and the stationary contact from being affected by the scratches falling on the moving contact and the stationary contact. The material of the limiting body is metal, which is more rigid and better limits the moving contact group. The first guide part and the limiting body are integrally formed by insert injection molding or bonded or threaded connection, the combination of the two is better, the position of the first guide part along the Y-axis direction is more accurate, which is beneficial to better sliding cooperation with the sliding groove along the X-axis direction.

[0041] In the application, the first guide part and the second guide part cooperate with each other, which can better keep the moving contact part moving along the X-axis direction by sliding with the sliding groove along the X-axis direction, while avoiding the whole formed by the pushing piece and the limiting piece fixed to each other from deflecting in the plane perpendicular to the Z-axis direction, which is beneficial to ensure that the moving contact correctly abuts against the stationary contact along the X-axis direction.

[0042] In the application, the two second guide parts extend into the corresponding sliding grooves from the pushing body along the Z-axis direction away from each other, which can support the pushing piece along the Y-axis direction by the side wall of the sliding groove when the Y-axis direction is the direction of gravity, and cooperate with the first guide part to support the whole moving contact part. At the same time, it can also avoid the pushing piece deflecting in the plane perpendicular to the X-axis direction, which is beneficial to ensure that the moving contact correctly abuts against the stationary contact along the X-axis direction.

[0043] In the application, the projection of the second guide part on the first projection plane is circular, which is beneficial to reduce the sliding friction between the second guide part and the sliding groove along the X-axis direction and avoid the sliding cooperation between the second guide part and the sliding groove from being jammed.

[0044] In the application, each sliding groove is divided into a first groove section adapted to sliding cooperation with the first guide part and a second groove section adapted to sliding cooperation with the second guide part; the first groove section and the second groove section are connected or separated along the X-axis direction, which can ensure that the first groove section and the second groove section are located on a straight line extending along the X-axis direction, which is beneficial to more effectively guide the movement of the moving contact group along the X-axis direction.

[0045] In the application, the size of the first matching gap formed between the first guide part and the sliding groove along the Y-axis direction is different from the size of the second matching gap formed between the second guide part and the sliding groove along the Y-axis direction, which is beneficial to reduce the difficulty of establishing the sliding matching gap between the first guide part, the second guide part and the sliding groove, reduce the manufacturing precision requirement of the movable contact part and the fixed part, and is also beneficial to correctly guide the movement of the movable contact part along the Y-axis direction. This is because if both the first matching gap and the second matching gap are small, the manufacturing precision requirement of the pusher and the limiting piece fixed to each other is high, and the matching precision requirement of the shell and the cover is also high, otherwise the first guide part or the second guide part may not be inserted into the sliding groove, so that the first guide part and the second guide part cannot establish the sliding matching relationship with the sliding groove; if both the first matching gap and the second matching gap are large, the sliding matching between the accommodating piece and the guide part cannot correctly guide the movement of the movable contact part along the X-axis direction, and the movable contact part may be deflected in the plane perpendicular to the Z-axis direction. Therefore, the first matching gap is different from the second matching gap, which can not only reduce the manufacturing precision requirement of the movable contact part and the fixed part due to the existence of the relatively large matching gap, but also can correctly guide the movement of the movable contact part along the Y-axis direction due to the existence of the relatively small matching gap.

[0046] In the application, the first matching gap is smaller than the second matching gap. Because the first guide part is closer to the movable contact piece group along the X-axis direction, on the basis of being able to reduce the manufacturing precision requirement of the movable contact part and the fixed part, compared with the scheme that the first matching gap is larger than the second matching gap, the movable contact piece can be better guided to move along the X-axis direction, so that the movable contact point correctly contacts the static contact point along the X-axis direction, reduces the contact resistance between the movable contact point and the static contact point, and also shortens the time length of the electric arc when the movable contact point and the static contact point are disconnected, which is beneficial to increase the service life of the movable contact point and the static contact point.

[0047] Compared with the swing type magnetic latching relay in the prior art, the two armatures fixed to the permanent magnet in the armature assembly are improved from parallel arrangement to crossing each other, so that the armature assembly can be converted from swing relative to the coil assembly to linear motion relative to the coil assembly. Because 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 piece group and the static contact piece group in a limited space.

[0048] In the application, two armatures in the armature assembly are improved to cross each other on the basis of the coil assembly of the swing type magnetic latching relay, so that a first part of the magnetic circuit without any air gap can be formed between the two attracting parts of the armature assembly through the permanent magnet and the two armatures, and a second part of the magnetic circuit can also be formed between the two magnetic driving ends of the coil assembly through the whole coil assembly. In the magnetic latching state, the attracting parts attract the corresponding magnetic driving ends along the X axis direction, so that the first part and the second part can form a complete magnetic circuit without air gap, thus the magnetic loss is small, the magnetic efficiency is higher, and the movement stroke of the movable contact group can be increased without increasing the power consumption of the coil assembly; and in the case of equivalent magnetic driving force, the power consumption required for the coil assembly to realize magnetic driving can be reduced, and the size of the coil assembly can be made smaller. Therefore, more favorable conditions can be created for increasing the safety distance between the movable contact group and the static contact group in a limited space.

[0049] The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the application or in the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only embodiments of the application, and other accompanying drawings can also be obtained by those skilled in the art without any creative effort on the basis of the disclosed accompanying drawings.

[0051] Fig. 1 is a perspective exploded view of the relay in embodiment one;

[0052] Fig. 2 is a top view of the housing in embodiment one;

[0053] Fig. 3 is a perspective view of the cover in embodiment one;

[0054] Fig. 4 is a perspective view of the static contact group in embodiment one;

[0055] Fig. 5 is a perspective view of the static magnetic conductor in embodiment one;

[0056] Fig. 6 is a top view of the static magnetic conductor in embodiment one;

[0057] Fig. 7 is a front view of the magnetic circuit part in embodiment one;

[0058] Fig. 8 is a top view of the coil assembly in embodiment one;

[0059] Fig. 9 is a top view of the armature assembly in embodiment one;

[0060] Fig. 10 is a right view of the armature assembly in embodiment one;

[0061] Fig. 11 is a perspective view of the shield in Example 1;

[0062] Fig. 12 is a state diagram of the magnetic circuit portion when the armature assembly is in a magnetic holding state at the first position in Example 1;

[0063] Fig. 13 is a state diagram of the magnetic circuit portion when the coil winding receives a first pulse electric signal in Example 1;

[0064] Fig. 14 is a state diagram of the magnetic circuit portion when the armature assembly moves to the second position in Example 1;

[0065] Fig. 15 is a state diagram of the magnetic circuit portion when the armature assembly is in a magnetic holding state at the second position in Example 1;

[0066] Fig. 16 is a state diagram of the magnetic circuit portion when the coil winding receives a second pulse electric signal in Example 1;

[0067] Fig. 17 is a state diagram of the magnetic circuit portion when the armature assembly moves to the first position in Example 1;

[0068] Fig. 18 is a top view of the movable contact portion in Example 1;

[0069] Fig. 19 is a front view of the pusher in Example 1;

[0070] Fig. 20 is a perspective exploded view of the partial components of the movable contact portion in Example 1;

[0071] Fig. 21 is a right view of the limiting member in Example 1;

[0072] Fig. 22 is a sectional view along A-A of Fig. 21;

[0073] Fig. 23 is a diagram of the internal structure of the relay in the off state in Example 1;

[0074] Fig. 24 is a diagram of the internal structure of the relay in the on state in Example 1;

[0075] Fig. 25 is a right view of the relay in Example 1;

[0076] Fig. 26 is a sectional view along B-B of Fig. 25.

[0077] Main reference signs: 1, relay; 2, fixed part; 3, magnetic circuit part; 4, moving contact part; 5, micro switch; 6, accommodating member; 7, static contact piece group; 8, static magnetic conductor; 9, blocking member; 10, housing; 11, cover; 12, accommodating cavity; 13, sliding groove; 14, first groove segment; 15, second groove segment; 16, static magnetic conductor groove; 17, blocking member groove; 18, abutting surface; 19, static contact piece; 20, static contact point; 21, connecting terminal; 22, first static contact piece; 23, second static contact piece; 24, first overcurrent portion; 25, first static contact point; 26, second overcurrent portion; 27, third overcurrent portion; 28, fourth overcurrent portion; 29, fifth overcurrent portion; 30, sixth overcurrent portion; 27a, measurement terminal; 31, first connecting terminal; 32, seventh overcurrent portion; 33, second static contact point; 34, eighth overcurrent portion; 35, ninth overcurrent portion; 36, second connecting terminal; 37, coil assembly; 38, armature assembly; 39, shielding cover; 40, coil holder; 41, coil winding; 42, signal input terminal; 43, core; 44, yoke; 45, magnetic driving end; 46, first yoke; 47, second yoke; 48, first magnetic driving end; 49, second magnetic driving end; 50, permanent magnet; 51, armature; 52, first permanent magnet; 53, second permanent magnet; 54, magnetic pole; 55, first magnetic pole; 56, second magnetic pole; 57, first armature; 58, second armature; 59, mutually intersecting portions; 60, attraction portion; 61, first attraction portion; 62, second attraction portion; 63, third attraction portion; 64, fourth attraction portion; 65, first shielding member; 66, second shielding member; 67, partition wall; 68, connecting wall; 69, recess; 70, pushing member; 71, connecting member; 72, moving contact piece group; 73, moving magnetic conductor group; 74, elastic support group; 75, elastic member; 76, limiting member; 77, pushing body; 78, second guide portion; 79, accommodating portion; 80, first insert portion; 81, second insert portion; 82, connecting column; 83, moving spring; 84, connecting end; 85, moving contact piece; 86, overcurrent bridge; 87, moving contact point; 88, first moving contact point; 89, second moving contact point; 90, moving magnetic conductor; 91, magnetic conductor body; 92, extension portion; 93, elastic support; 94, frame body; 95, first elastic portion; 96, first connecting hole; 97, first elastic arm; 98, main body; 99, second elastic portion; 100, second connecting hole; 101, second elastic arm; 102, limiting body; 103, first guide portion; 104, limiting portion; 105, connecting portion; 106, avoiding hole; 107, assembly hole; 108, bending portion; 109, guide portion; 110, static contact terminal; F1, first magnetic force; M1, short-circuit-resistant magnetic circuit; M2, counter-flow magnetic field; S1, first surface; S2, second surface; W, interval; X1, closing direction; X2, opening direction. DETAILED DESCRIPTION

[0078] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0079] In the claims and the specification, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the features with one of the above directions are perpendicular to the features with another direction, and do not require that they must be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" introduced in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into front and back, and the left side is front and the right side is back in the specification FIG. 23. The X-axis direction can also be divided into closing direction and opening direction. The closing direction means the movement direction when the moving contact group moves to the closed state with the stationary contact group, that is, the direction from back to front, which is the direction from right to left in the specification FIG. 23. The opening direction means the movement direction when the moving contact group moves to the open state with the stationary contact group, that is, the direction from front to back, which is the direction from left to right in the specification FIG. 23. The Y-axis direction can be divided into left and right, and the upper side is left and the lower side is right in the specification FIG. 23. The Z-axis direction can be divided into up and down.

[0080] In the claims and the specification, unless otherwise defined, the terms "first", "second" or "third" and the like are intended to distinguish different objects, rather than to describe a particular order.

[0081] In the claims and the specification, unless otherwise defined, 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.

[0082] In the claims and the specification, unless otherwise defined, the terms "include", "have" and their variants mean "include but not limited to".

[0083] In the claims and the specification, unless otherwise defined, the term "provided with" means that the technical feature located after it is part of the technical feature located before it.

[0084] In the claims and the specification, unless otherwise defined, the term "group" means a set, which can include one element or multiple elements, for example, the "moving contact group" can include one moving contact or more than two moving contacts.

[0085] The term "temporarily formed" as used in the claims and specification, unless otherwise defined, means the polarity of the magnetic drive end formed by the pulsed electrical signal disappears with the disappearance of the pulsed electrical signal.

[0086] The term "reversing" as used in the claims and specification, unless otherwise defined, means the polarity of the magnetic drive end temporarily formed by the pulsed electrical signal received by the coil winding this time is opposite to the polarity of the magnetic drive end temporarily formed by the pulsed electrical signal received by the coil winding last time. Of course, those skilled in the art should understand that for a magnetic latching relay, if the pulsed electrical signal received by the coil assembly this time is of the same current direction as the pulsed electrical signal received by the coil assembly last time, the pulsed electrical signal received by the coil assembly this time is of no control significance, and the state of the relay will not change.

[0087] The term "back surface" as used in the claims and specification, unless otherwise defined, means the surface facing away from the stationary contact assembly.

[0088] The term "mounted" as used in the claims and specification, unless otherwise defined, means connected directly or indirectly to each other.

[0089] Embodiment One

[0090] The relay is used to receive an electrical signal to control the on-off of an external circuit. The relay in this embodiment is a magnetic latching relay, which is used to receive a pulsed electrical signal to control the on-off of an external circuit. In this embodiment, the pulsed electrical signal can be divided into a first pulsed electrical signal and a second pulsed electrical signal. The first pulsed electrical signal is used to control the turn-on of the external circuit, and the second pulsed electrical signal is used to control the turn-off of the external circuit. After receiving the first pulsed electrical signal, the relay switches from the off state to the on state, and after the first pulsed electrical signal disappears, the relay remains in the on state until the second pulsed electrical signal is received. After receiving the second pulsed electrical signal, the relay switches from the on state to the off state, and after the second pulsed electrical signal disappears, the relay remains in the off state until the first pulsed electrical signal is received. In this embodiment, the external circuit is a single-phase alternating current circuit. The relay needs to control the on-off of the single-phase alternating current circuit.

[0091] Referring to FIG. 1, FIG. 1 shows the structure of the relay 1 in this embodiment. As shown in FIG. 1, the relay 1 includes a fixed part 2, a magnetic circuit part 3, a movable contact part 4, and a micro switch 5. The parts of the fixed part 2 are fixed relative to each other and can serve as a movement reference for the movable contact part 4. The magnetic circuit part 3 is used to receive a pulsed electrical signal and drive the movable contact part 4 to move based on the pulsed electrical signal. The movable contact part 4 is driven by the magnetic circuit part 3 to move along the X-axis direction relative to the fixed part 2 to control the on-off of an external circuit. The micro switch 5 is used to send a relay state signal to an external relay state sensing circuit.

[0092] As shown in FIG. 1, the fixed part 2 comprises a housing 6, a static contact group 7, a static magnetic conductor 8 and a barrier 9.

[0093] As shown in FIG. 1, the housing 6 is made of plastic and comprises a shell 10 and a cover 11.

[0094] Referring to FIG. 2, the shell 10 in the embodiment is shown. As shown in FIG. 2, the shell 10 is provided with a cavity 12 which is open upward along the Z-axis direction and used for accommodating the static contact group 7, the static magnetic conductor 8, the barrier 9, the magnetic circuit part 3, the movable contact part 4 and the micro switch 5. The bottom wall of the shell 10 is provided with a sliding groove 13 in the middle along the Y-axis direction, the sliding groove 13 extends along the X-axis direction and is divided into a first groove section 14 and a second groove section 15. The first groove section 14 is located in front of the second groove section 15. In the embodiment, the first groove section 14 and the second groove section 15 of the shell 10 are separated from each other along the X-axis direction, and in other embodiments, the first groove section 14 and the second groove section 15 of the shell 10 can be arranged to be connected to each other along the X-axis direction. The front of the first groove section 14 is provided with a static magnetic conductor groove 16. The left and right sides of the first groove section 14 along the Y-axis direction are respectively provided with a barrier groove 17. The rear of the two barrier grooves 17 is respectively provided with an abutting surface 18 which is arranged forward.

[0095] Referring to FIG. 3, the cover 11 in the embodiment is shown. As shown in FIG. 3, the cover 11 is fixedly connected with the shell 10 and used for shielding the cavity 12. The cover 11 is also provided with a sliding groove 13 which extends along the X-axis direction and is divided into a first groove section 14 and a second groove section 15. The first groove section 14 of the cover 11 is arranged corresponding to the first groove section 14 of the shell 10 along the Z-axis direction. The second groove section 15 of the cover 11 is arranged corresponding to the second groove section 15 of the shell 10 along the Z-axis direction. In the embodiment, the first groove section 14 and the second groove section 15 of the cover 11 are separated from each other along the X-axis direction, and in other embodiments, the first groove section 14 and the second groove section 15 of the cover 11 can be arranged to be connected to each other along the X-axis direction.

[0096] Referring to FIG. 4, FIG. 23 and FIG. 26, the static contact group 7 in the embodiment is shown. The static contact group 7 is used to electrically connect with external circuit. The static contact group 7 comprises two static contacts 19. Each static contact 19 is provided with a static contact point 20 and a connecting terminal 21. The connecting terminal 21 is used to connect external circuit. One of the two connecting terminals 21 is used to connect power supply, and the other is used to connect load. When the two static contacts 19 are turned on, the power supply and the load are turned on; when the two static contacts 19 are turned off, the power supply and the load are turned off. In the embodiment, the two static contacts 19 are respectively a first static contact 22 and a second static contact 23. The first static contact 22 is provided with a first overcurrent part 24, a first static contact point 25, a second overcurrent part 26, a third overcurrent part 27, a fourth overcurrent part 28, a fifth overcurrent part 29 and a sixth overcurrent part 30. The first overcurrent part 24 extends vertically along the X-axis direction and along the Z-axis direction. The first overcurrent part 24 is provided with a first surface S1 facing backward along the X-axis direction. The first static contact point 25 is the static contact point 20 of the first static contact 22. The number of the first static contact point 25 is two, and the two first static contact points 25 are arranged along the Z-axis direction. The two first static contact points 25 extend backward along the X-axis direction from the first surface S1 of the first overcurrent part 24. The second overcurrent part 26 extends forward along the X-axis direction from the right side of the first overcurrent part 24 along the Y-axis direction. The third overcurrent part 27 extends rightward along the Y-axis direction from the front end of the second overcurrent part 26 along the X-axis direction, as shown in FIG. 23, the third overcurrent part 27 penetrates the accommodating member 6 rightward along the Y-axis direction. As shown in FIG. 4, the lower part of the third overcurrent part 27 along the Z-axis direction is provided with a measuring terminal 27a extending downward along the Z-axis direction, as shown in FIG. 26, the measuring terminal 27a extends out of the accommodating member 6 downward along the Z-axis direction. As shown in FIG. 4, the fourth overcurrent part 28 extends backward along the X-axis direction from the right side of the third overcurrent part 27 along the Y-axis direction. The fifth overcurrent part 29 extends rightward along the Y-axis direction from the rear end of the fourth overcurrent part along the X-axis direction. The sixth overcurrent part 30 extends backward along the X-axis direction from the right side of the fifth overcurrent part 29 along the Y-axis direction and from the lower part of the sixth overcurrent part along the Z-axis direction. In the embodiment, the part of the third overcurrent part 27 extending out of the accommodating member 6, the fourth overcurrent part, the fifth overcurrent part and the sixth overcurrent part constitute a first connecting terminal 31. The first connecting terminal 31 is the connecting terminal 21 of the first static contact 22. The second static contact 23 is provided with a seventh overcurrent part 32, a second static contact point 33, an eighth overcurrent part 34 and a ninth overcurrent part 35. The seventh overcurrent part 32 is provided with a first surface S1 (not marked in FIG. 4) facing backward along the X-axis direction. The first surface S1 of the seventh overcurrent part 32 and the first surface S1 of the first overcurrent part 24 are located on the same plane perpendicular to the X-axis. The second static contact point 33 is the static contact point 20 of the second static contact 23. The number of the second static contact point 33 is two, and the two second static contact points 33 are arranged along the Z-axis direction. The two second static contact points 33 extend backward along the X-axis direction from the first surface S1 of the seventh overcurrent part 32. The eighth overcurrent part 34 extends backward along the X-axis direction from the right side of the seventh overcurrent part 32 along the Y-axis direction.The ninth flow portion 35 extends rightward along the Y-axis direction from the rear end along the X-axis direction and the lower part along the Z-axis direction of the eighth flow portion. As shown in FIG. 23, the ninth flow portion 35 extends rightward along the Y-axis direction out of the housing 6. In this embodiment, the ninth flow portion 35 constitutes a second connecting terminal 36. The second connecting terminal 36 is a connecting terminal 21 of the second static contact 23. The second connecting terminal 36 can be used to install a mutual inductor. In this embodiment, two connecting terminals 21 are arranged along the X-axis direction and each extends out of the housing 6 along the Y-axis direction.

[0097] Referring to FIGS. 5 and 6, the static flux guide 8 in this embodiment is shown. As shown in FIG. 5, the static flux guide 8 extends along the Z-axis direction. As shown in FIG. 6, the surface of the static flux guide 8 along the X-axis direction forward forms a second surface S2. The second surface S2 is perpendicular to the X-axis direction.

[0098] Referring to FIG. 1, the barrier 9 in this embodiment is shown. In this embodiment, the number of barriers 9 is two. Each barrier 9 is in a sheet shape 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.

[0099] Referring to FIG. 7, the magnetic circuit portion 3 in this embodiment is shown. As shown in FIG. 7, the magnetic circuit portion 3 includes a coil assembly 37, an armature assembly 38, and a shield cover 39.

[0100] Referring to FIG. 7 and FIG. 8, the coil assembly 37 in the present embodiment is shown. As shown in FIG. 7 and FIG. 8, 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 signal to reverse the polarity temporarily formed by the two magnetic driving ends 45, so as to switch different parts of the two armatures 51 of the armature assembly 38 and drive the armature assembly 38 to move along the X-axis direction. In the present embodiment, for the convenience of introduction, it is assumed that when the signal input terminals 42 receive a first pulse electrical signal, the coil winding 41 generates a first magnetic field, and the first magnetic driving end 48 temporarily has N-pole polarity, and the second magnetic driving end 49 temporarily has S-pole polarity. After the first pulse electrical signal disappears, the first magnetic field of the coil winding 41 disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated based on the first magnetic field; when the signal input terminals 42 receive a second pulse electrical signal with current direction opposite to that of the first pulse electrical signal, the coil winding 41 generates a second magnetic field, and the polarity of the first magnetic driving end 48 reverses to have S-pole polarity, and the polarity of the second magnetic driving end 49 reverses to have N-pole polarity. After the second pulse electrical signal disappears, the second magnetic field of the coil winding 41 disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated based on the second magnetic field. The "temporarily formed" in the present embodiment refers to the polarity of the magnetic driving end 45 formed by the pulse electrical signal disappearing with the disappearance of the pulse electrical signal. The "reversal" in the present embodiment refers to that when the coil winding 41 receives a pulse electrical signal this time and the current direction of the pulse electrical signal is different from that of the pulse electrical signal received last time, the polarity of the magnetic driving end 45 temporarily formed this time is opposite to that of the magnetic driving end 45 temporarily formed last time.

[0101] Referring to FIG. 9 and FIG. 10, the armature assembly 38 in the embodiment is shown. The armature assembly 38 is driven by the coil assembly 37 to move along the X-axis direction between a first position and a second position. When the armature assembly 38 moves to the first position, the relay 1 is in an off state, and the external circuit is turned off. When the armature assembly 38 moves to the second position, the relay 1 is in an on state, and the external circuit is turned on. The first position is further along the X-axis direction than the second position. As shown in FIG. 9 and FIG. 10, in the embodiment, the armature assembly 38 includes two permanent magnets 50 and two armatures 51. The two permanent magnets 50 are formed by magnetized magnetic steel, and in other embodiments, the two permanent magnets 50 can also use other permanent magnet materials, such as neodymium iron boron permanent magnets. In the embodiment, the two permanent magnets 50 are a first permanent magnet 52 and a second permanent magnet 53, respectively. Each permanent magnet 50 is provided with two magnetic poles 54 with fixed polarity, and the two magnetic poles 54 are a first magnetic pole 55 and a second magnetic pole 56, respectively. The first magnetic pole 55 and the second magnetic pole 56 have opposite polarities. For the convenience of introduction, it is assumed that the polarity of the first magnetic pole 55 is N-pole, and the polarity of the second magnetic pole 56 is S-pole. In the embodiment, the two magnetic poles 54 of each permanent magnet 50 are arranged along the X-axis direction. In the embodiment, the two permanent magnets 50 are arranged along the Y-axis direction. The first permanent magnet 52 is on the left along the Y-axis direction, and the second permanent magnet 53 is on the right along the Y-axis direction. The first magnetic pole 55 of the first permanent magnet 52 is in front along the X-axis direction, and the second magnetic pole 56 is behind along the X-axis direction. The first magnetic pole 55 of the second permanent magnet 53 is behind along the X-axis direction, and the second magnetic pole 56 is in front along the X-axis direction. The two armatures 51 are a first armature 57 and a second armature 58, respectively. The first armature 57 is fixedly connected to the first magnetic poles 55 of the two permanent magnets 50. The second armature 58 is fixedly connected to the second magnetic poles 56 of the two permanent magnets 50. The projections of the two armatures 51 on a first projection plane perpendicular to the Z-axis direction intersect each other. The portions 59 where the two armatures 51 intersect each other form a spacing W along the Z-axis direction. Each armature 51 is provided with two attracting portions 60 on both sides along the Y-axis direction, and the two attracting portions 60 are arranged along the X-axis direction. The first armature 57 is provided with a first attracting portion 61 and a second attracting portion 62 on both sides along the Y-axis direction, the first attracting portion 61 is on the left along the Y-axis direction and in front along the X-axis direction, and the second attracting portion 62 is on the right along the Y-axis direction and behind along the X-axis direction. The second armature 58 is provided with a third attracting portion 63 and a fourth attracting portion 64 on both sides along the Y-axis direction, the third attracting portion 63 is on the right along the Y-axis direction and in front along the X-axis direction, and the fourth attracting portion 64 is on the left along the Y-axis direction and behind along the X-axis direction. Therefore, in the embodiment, the first attracting portion 61 and the third attracting portion 63 are arranged along the Y-axis direction, the fourth attracting portion 64 and the second attracting portion 62 are arranged along the Y-axis direction, the first attracting portion 61 and the fourth attracting portion 64 are arranged along the X-axis direction, and the third attracting portion 63 and the second attracting portion 62 are arranged along the X-axis direction.In this embodiment, the projection of the armature assembly 38 on the first projection plane is mirror symmetrical relative to the symmetry plane perpendicular to the Y-axis direction.

[0102] Referring to FIG. 7 and FIG. 11, FIG. 7 and FIG. 11 show the shield 39 in this embodiment. As shown in FIG. 11, the shield 39 comprises a first shield 65 and a second shield 66. The first shield 65 and the second shield 66 are inserted and fitted to form the shield 39. The shield 39 is provided with two walls 67 and a connecting wall 68. Each wall 67 is provided with a groove 69 at the front end thereof along the X-axis direction, and the groove 69 extends along the X-axis direction and is located at the middle of the wall 67 along the Y-axis direction. As shown in FIG. 7, the two walls 67 are both perpendicular to the Z-axis direction. The two walls 67 are arranged above and below the coil assembly 37 along the Z-axis direction. The connecting wall 68 is perpendicular to the X-axis direction and is used to connect the two walls 67. The connecting wall 68 is arranged behind the coil assembly 37 along the X-axis direction.

[0103] Referring to FIG. 12 to FIG. 17, FIG. 12 to FIG. 17 show the operation principle of the magnetic circuit part 3 in this embodiment.

[0104] As shown in FIG. 12, in this embodiment, the armature assembly 38 is located between the arms of the two yokes 44 extending along the X-axis direction along the Y-axis direction. The first magnetic driving end 48 is located between the first attraction part 61 and the fourth attraction part 64 along the X-axis direction; the second magnetic driving end 49 is located between the third attraction part 63 and the second attraction part 62 along the X-axis direction.

[0105] Fig. 12 shows the state of the magnetic circuit portion 3 when the armature assembly 38 is in the magnetic holding state at the first position in the present embodiment. As shown in Fig. 12, when the armature assembly 38 is in the magnetic holding state at the first position, the first attraction portion 61 attracts the first magnetic driving end 48, and the third attraction portion 63 attracts the second magnetic driving end 49. At this time, the magnetic circuit portion 3 forms two closed magnetic circuits, i.e., a first closed magnetic circuit and a second closed magnetic circuit. The first closed magnetic circuit passes from the first magnetic pole 55 of the first permanent magnet 52, through the first attraction portion 61, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, the second magnetic driving end 49, the third attraction portion 63, the portion 59 where the first and second armatures 57, 58 cross each other, the second magnetic pole 56 of the first permanent magnet 52, back to the first magnetic pole 55 of the first permanent magnet 52, without any air gap in between, and through the entire coil assembly 37. The second closed magnetic circuit passes from the first magnetic pole 55 of the second permanent magnet 53, through the portion 59 where the first and second armatures 57, 58 cross each other, the first attraction portion 61, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, the second magnetic driving end 49, the third attraction portion 63, the second magnetic pole 56 of the second permanent magnet 53, back to the first magnetic pole 55 of the second permanent magnet 53, without any air gap in between, and through the entire coil assembly 37. Therefore, when the armature assembly 38 is in the magnetic holding state at the first position, due to the existence of the first and second closed magnetic circuits and the superposition effect between them, a greater magnetic attraction force is generated between the first attraction portion 61 and the first magnetic driving end 48, and between the third attraction portion 63 and the second magnetic driving end 49, so that the armature assembly 38 is held at the first position relative to the coil assembly 37.

[0106] Fig. 13 shows the state of the magnetic circuit part 3 when the coil assembly 37 just receives the first pulse electric signal in the present embodiment. As shown in Fig. 13, at this time, the coil winding 41 is excited by the first pulse electric signal to generate the first magnetic field, so that the first magnetic driving end 48 temporarily has the N-pole polarity and the second magnetic driving end 49 temporarily has the S-pole polarity. Since the first magnetic driving end 48 and the first attraction part 61 have the same N-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the first attraction part 61. Since the second magnetic driving end 49 and the third attraction part 63 have the same S-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the third attraction part 63. In addition, the magnetic circuit part 3 at this time forms two push magnetic circuits, i.e. a first push magnetic circuit and a second push magnetic circuit. The first push magnetic circuit passes through the entire coil assembly 37 from the first magnetic driving end 48, through the stroke air gap, the fourth attraction part 64, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the portion 59 where the first armature 57 intersects with each other, the second attraction part 62, the stroke air gap, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, and returns to the first magnetic driving end 48, with only two stroke air gaps in the middle. The second push magnetic circuit also passes through the entire coil assembly 37 from the first magnetic driving end 48, through the stroke air gap, the fourth attraction part 64, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second attraction part 62, the stroke air gap, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, and returns to the first magnetic driving end 48, with only two stroke air gaps in the middle. Therefore, when the coil assembly 37 just receives the first pulse electric signal, not only the first magnetic driving end 48 generates the magnetic repulsion force to the first attraction part 61 and the second magnetic driving end 49 generates the magnetic repulsion force to the third attraction part 63, but also the first magnetic driving end 48 generates the magnetic attraction force to the fourth attraction part 64 and the second magnetic driving end 49 generates the magnetic attraction force to the second attraction part 62 due to the existence of the first push magnetic circuit and the second push magnetic circuit and the superposition effect between them, so that the coil assembly 37 can generate a stronger pushing force to the armature assembly 38 to push the armature assembly 38 to move from the first position to the second position along the closing direction X1.

[0107] Fig. 14 shows the state of the magnetic circuit part 3 when the armature assembly 38 is driven by the coil assembly 37 to move to the second position in the closing direction X1 in the present embodiment. As shown in Fig. 14, when the armature assembly 38 just moves to the second position, the first pulse electric signal and the first magnetic field have not disappeared yet, the first magnetic driving end 48 still temporarily has the N-pole polarity, and the second magnetic driving end 49 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 forms two closed magnetic circuits, i.e., a third closed magnetic circuit and a fourth closed magnetic circuit. The third closed magnetic circuit is from the first magnetic driving end 48, through the fourth attraction portion 64, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the portion 59 where the first armature 57 intersects with each other, the second attraction portion 62, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, back to the first magnetic driving end 48, without any air gap in the middle, and passes through the entire coil assembly 37. The fourth closed magnetic circuit is from the first magnetic driving end 48, through the fourth attraction portion 64, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the second attraction portion 62, the second magnetic driving end 49, the second yoke 47, the core 43, the first yoke 46, back to the first magnetic driving end 48, without any air gap in the middle, and passes through the entire coil assembly 37. Therefore, when the armature assembly 38 just moves to the second position, due to the existence of the third closed magnetic circuit and the fourth closed magnetic circuit and the superposition effect between the two, a greater magnetic attraction force is generated between the first magnetic driving end 48 and the fourth attraction portion 64 and between the second magnetic driving end 49 and the second attraction portion 62.

[0108] Fig. 15 shows the state of the magnetic circuit part 3 when the armature assembly 38 is in the magnetic holding state at the second position in the present embodiment. As shown in Fig. 15, when the first pulse electric signal disappears, the first magnetic field disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated by the first magnetic field. At this time, the third closed magnetic circuit and the fourth closed magnetic circuit described above still exist, wherein the third closed magnetic circuit can be regarded as starting from the first magnetic pole 55 of the first permanent magnet 52, and its path is the same as that of the third closed magnetic circuit shown in Fig. 14; the fourth closed magnetic circuit can be regarded as starting from the first magnetic pole 55 of the second permanent magnet 53, and its path is the same as that of the fourth closed magnetic circuit shown in Fig. 14. And the third closed magnetic circuit and the fourth closed magnetic circuit superimpose on each other, so that a greater magnetic attraction force is generated between the fourth attraction portion 64 and the first magnetic driving end 48 and between the second attraction portion 62 and the second magnetic driving end 49, and the armature assembly 38 is kept at the second position relative to the coil assembly 37.

[0109] Fig. 16 shows the state of the magnetic circuit part 3 when the coil assembly 37 just receives the second pulse electric signal in the present embodiment. As shown in Fig. 16, at this time, the coil winding 41 is excited by the second pulse electric signal to generate the second magnetic field, so that the first magnetic driving end 48 temporarily has the S-pole polarity and the second magnetic driving end 49 temporarily has the N-pole polarity. Since the first magnetic driving end 48 and the fourth attraction part 64 have the same S-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction part 64; since the second magnetic driving end 49 and the second attraction part 62 have the same N-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction part 62. In addition, the magnetic circuit part 3 at this time forms two push magnetic circuits, i.e. the third push magnetic circuit and the fourth push magnetic circuit. The third push magnetic circuit passes through the entire coil assembly 37 from the second magnetic driving end 49, through the stroke air gap, the third attraction part 63, the portion 59 where the second armature 58 intersects with each other, the second magnetic pole 56 of the first permanent magnet 52, the first magnetic pole 55 of the first permanent magnet 52, the first attraction part 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, with only two stroke air gaps in the middle. The fourth push magnetic circuit also passes through the entire coil assembly 37 from the second magnetic driving end 49, through the stroke air gap, the third attraction part 63, the second magnetic pole 56 of the second permanent magnet 53, the first magnetic pole 55 of the second permanent magnet 53, the portion 59 where the first armature 57 intersects with each other, the first attraction part 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, with only two stroke air gaps in the middle. Therefore, when the coil assembly 37 just receives the second pulse electric signal, not only the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction part 64 and the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction part 62, but also due to the existence of the third push magnetic circuit and the fourth push magnetic circuit, and the superposition effect between 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.

[0110] Fig. 17 shows the state of the magnetic circuit part 3 when the armature assembly 38 is driven by the coil assembly 37 to move in the breaking direction X2 to the first position in the present embodiment. As shown in Fig. 17, when the armature assembly 38 just moves to the first position, the second pulse electric signal and the second magnetic field have not disappeared yet, the first magnetic driving end 48 still temporarily has the S-pole polarity, and the second magnetic driving end 49 still temporarily has the S-pole polarity. At this time, the magnetic circuit part 3 still has the first closed magnetic circuit and the second closed magnetic circuit shown in Fig. 12, wherein the first closed magnetic circuit can be regarded as starting from the second magnetic driving end 49 and having the same path as that of the first closed magnetic circuit shown in Fig. 12, and the second closed magnetic circuit can be regarded as starting from the second magnetic driving end 49 and having the same path as that of the second closed magnetic circuit shown in Fig. 12. Therefore, when the armature assembly 38 just moves to the first position, due to the existence of the first closed magnetic circuit and the second closed magnetic circuit and the superposition effect between them, a greater magnetic attraction force is generated between the first magnetic driving end 48 and the first attraction part 61 and between the second magnetic driving end 49 and the third attraction part 63.

[0111] When the second pulse electric signal disappears, the second magnetic field disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 38 is in the magnetic holding state at the first position as shown in Fig. 12.

[0112] Referring to Fig. 18, Fig. 18 shows the movable contact part 4 in the present embodiment. As shown in Fig. 18, the movable contact part 4 includes a pushing piece 70, a connecting piece 71, a movable contact piece group 72, a movable magnetic conductor group 73, an elastic support piece group 74, an elastic piece 75, and a limiting piece 76.

[0113] Referring to FIG. 19, FIG. 19 shows the pusher 70 and the connecting piece 71 in the present embodiment. As shown in FIG. 19, in the present embodiment, the armature assembly 38, the connecting piece 71 and the moving spring 83 are fixed to the pusher 70, and the armature assembly 38, the connecting piece 71 and the moving spring 83 are integrally formed with the pusher 70 by insert injection molding. The pusher 70 is made of plastic. The pusher 70 is provided with a pusher body 77 and two second guide portions 78. The pusher body 77 is provided with a receiving portion 79, a first insert portion 80 and a second insert portion 81. The receiving portion 79 is used for accommodating the armature assembly 38. The first insert portion 80 is used for accommodating the connecting piece 71 and is located in front of the receiving portion 79 along the X-axis direction. The front surface of the first insert portion 78 is provided with two connecting columns 82. The two connecting columns 82 are arranged along the Z-axis direction. Each connecting column 82 extends forward from the front surface of the first insert portion 80 along the X-axis direction. The second insert portion 81 is used for accommodating the moving spring 83 and is located behind the receiving portion 79 along the X-axis direction. The moving spring 83 is part of the micro switch 5, which will be described later. The two second guide portions 78 extend away from each other along the Z-axis direction from the pusher body 77. In the present embodiment, the two second guide portions 78 extend away from each other along the Z-axis direction from the upper surface and the lower surface of the receiving portion 79 along the Z-axis direction, respectively, and the second guide portion 78 is arranged at the middle 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 on a first projection plane perpendicular to the Z-axis direction is circular.

[0114] As shown in FIG. 19, the connecting piece 71 extends along the Z-axis direction, and the two ends thereof along the Z-axis direction respectively extend out of the first insert portion 80 to form two connecting ends 84.

[0115] Referring to FIG. 20, FIG. 20 shows the moving contact set 72, the moving magnet set 73, the elastic support set 74 and the elastic member 75 in the present embodiment. The moving contact set 72 is driven to close or open with the stationary contact set 7 along the X-axis direction by the armature assembly 38 and the pusher 70 integrally formed with the armature assembly 38 by insert injection molding, so as to correspondingly turn on or turn off the electrical connection between the two stationary contacts 19. As shown in FIG. 20, the moving contact set 72 includes two moving contacts 85. The two moving contacts 85 are arranged along the Z-axis direction. Each moving contact 85 is provided with an overcurrent bridge 86 and a moving contact point 87, specifically, 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 and is provided with a moving contact point 87 at each end. The two moving contact points 87 are arranged along the Y-axis direction and are fixed to the overcurrent bridge 86, and each moving contact point 87 is arranged along the X-axis direction towards the front and opposite to the corresponding stationary contact point 20. The moving contact point 87 opposite to the first stationary contact point 25 along the X-axis direction is a first moving contact point 88; the moving contact point 87 opposite to the second stationary contact point 33 along the X-axis direction is a second moving contact point 89. When the moving contact set 72 is closed with the stationary contact set 7, each first moving contact point 88 abuts against the corresponding first stationary contact point 25 along the X-axis direction, each second moving contact point 89 abuts against the corresponding second stationary contact point 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned on through the two moving contacts 85. When the moving contact set 72 is opened with the stationary contact set 7, each first moving contact point 88 is away from the corresponding first stationary contact point 25 along the X-axis direction, each second moving contact point 89 is away from the corresponding second stationary contact point 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned off.

[0116] The moving magnet set 73 is fixed opposite to the moving contact set 72 and is arranged opposite to the stationary magnet 8 along the X-axis direction. As shown in FIG. 20, the moving magnet set 73 includes a moving magnet 90, and the moving magnet 90 is arranged opposite to the moving contact 85. In the present embodiment, the number of the moving magnet 90 is two, and the two moving magnets 90 are arranged along the Z-axis direction. Each moving magnet 90 is provided with a magnet body 91 and two extension portions 92. The magnet body 91 extends along the Z-axis direction and is fixed to the back surface of the overcurrent bridge 86, where the "back surface" refers to the surface facing away from the stationary contact set 7. The extension portion 92 extends forward along the X-axis direction from the two ends of the magnet body 91 along the Z-axis direction.

[0117] The elastic support set 74 is arranged on the pushing member 70 and located between the pushing member 70 and the movable contact set 72 along the X-axis direction. As shown in FIG. 20, the elastic support set 74 includes elastic supports 93. In the embodiment, the number of the elastic supports 93 is two and arranged along the Z-axis direction. The elastic support 93 is provided with a support body 94 and a first elastic part 95. The support body 94 is fixed relative to the pushing member 70. The support body 94 is provided with two first connecting holes 96 corresponding to the connecting columns 82. The connecting columns 82 pass through the first connecting holes 96 so that the support body 94 is positioned along any direction perpendicular to the X-axis direction relative to the pushing member 70. The first elastic part 95 can be elastically deformed along the X-axis direction. The first elastic part 95 is arranged corresponding to the movable contact 85. The movable contact 85 is fixedly connected to the corresponding first elastic part 95. In the embodiment, each first elastic part 95 includes two first elastic arms 97. One end of the first elastic arm 97 is integrated with the support body 94. The other end is fixedly connected to the overcurrent bridge 86. The position where the first elastic arm 97 is fixedly connected to the back of the overcurrent bridge 86 corresponds to the position of the movable contact 87.

[0118] The elastic member 75 can abut against the accommodating member 6. The elastic member 75 is deformed to store energy when the pushing member 70 moves along the disconnecting direction X2. The elastic member 75 restores deformation to release energy when the pushing member 70 moves along the closing direction X1. As shown in FIG. 20, the elastic member 75 is provided with a main body 98 and a second elastic part 99. The main body 98 is in the shape of a sheet perpendicular to the X-axis direction and is fixed relative to the pushing member 70. The main body 98 is provided with two second connecting holes 100 corresponding to the connecting columns 82. The connecting columns 82 pass through the second connecting holes 100 so that the main body 98 is positioned along any direction perpendicular to the X-axis direction relative to the pushing member 70. The main body 98 is located between the support body 94 and the first insert part 78 along the X-axis direction. The second elastic part 99 can be elastically deformed along the X-axis direction. The second elastic part 99 is arranged corresponding to the movable contact 85 in the movable contact set 72. The second elastic part 99 includes two second elastic arms 101. One end of each second elastic arm 101 is integrated with the main body 98. The other end extends to the two sides of the Y-axis direction and can abut against the corresponding abutting surface 18.

[0119] Referring to FIGS. 21 and 22, the limit member 76 in the present embodiment is shown. The limit member 76 is fixed relative to the push member 70 and abuts the moving contact group 72 rearward when the moving contact group 72 is disconnected from the stationary contact group 7, so as to limit the distance between the moving contact group 72 and the stationary contact group 7. As shown in FIGS. 21 and 22, the limit member 76 is provided with a limit body 102 and two first guide portions 103. The limit body 102 is made of metal. The limit body 102 is provided with a limit portion 104 and two connecting portions 105, which are of an integral structure. The limit portion 104 is capable of abutting each moving contact 85 in the moving contact group 72. The limit portion 104 extends along the Z-axis direction and is provided with three avoiding holes 106 for the extension portions 92 of the moving magnetic conductors 90 to extend forward along the X-axis direction. The two connecting portions 105 extend rearward along the Z-axis direction from the two ends of the limit portion 104, respectively. The connecting portion 105 is provided with a mounting hole 107 for cooperation and fixation with the connecting end 84 and a bent portion 108 for mounting the first guide portion 103. The bent portion 108 extends along the Z-axis direction from the front end of the connecting portion 105 along the closing direction X1. The extension directions of the bent portions 108 of the two connecting portions 105 are away from each other. The two first guide portions 103 are located at the ends of the bent portions 108 along the Z-axis direction and away from each other. The first guide portions 103 are made of plastic. The two first guide portions 103 are integrally formed with the limit body 102 by insert injection molding, and the first guide portion 103 wraps the corresponding bent portion 108. In other embodiments, the first guide portion 103 can also be fixed with the limit body 102 by adhesion or threaded connection. In the present embodiment, the first guide portion 103 is located at the front end of the limit member 76 along the closing direction X1 along the X-axis direction and at the middle of the limit member 76 along the Y-axis direction. In the present embodiment, the first guide portion 103 and the second guide portion 78 are both guide portions 109. The guide portions 109 are used for guiding the movement of the moving contact portion 4 along the X-axis direction.

[0120] Referring to FIG. 1, the micro switch 5 in the present embodiment is shown. As shown in FIG. 1, in the present embodiment, the micro switch 5 includes the moving spring 83 and two stationary contact terminals 110. The stationary contact terminals 110 extend along the Z-axis direction and extend out of the accommodating member 6. The two stationary contact terminals 110 are arranged along the Y-axis direction and are located between the moving spring 83 and the coil winding 41 along the X-axis direction. The two stationary contact terminals 110 are used for electrical connection with the relay state sensing circuit. The moving spring 83 is fixed with the push member 70. In the present embodiment, the moving spring 83 is integrally formed with the push member 70 by insert injection molding and is located in the second insert portion 81. The moving spring 83 is provided with two abutting arms extending away from each other along the Y-axis direction. The moving spring 83 is driven by the push member 70 to move along the X-axis direction, so that the abutting arms abut or move away from the two stationary contact terminals 110. In other embodiments, when the moving spring 83 is not fixed with the push member 70, the moving spring 83 can also move away from the two stationary contact terminals based on the elastic restoring force of the moving spring 83.

[0121] Referring to FIG. 23 and FIG. 26, FIG. 23 and FIG. 26 show the internal structure of the relay 1 in the present embodiment.

[0122] As shown in FIG. 23, in the present embodiment, the magnetic circuit part 3 and the movable contact part 4 are arranged in the accommodating cavity 12. The two static contacts 19 of the static contact group 7 are fixed to the accommodating member 6, so that the static contact points 20 of the two static contacts 19 are arranged along the Y-axis direction, and the connecting terminals 21 of the two static contacts 19 are arranged along the X-axis direction and protrude out of the accommodating member 6 along the Y-axis direction. The second connecting terminals 35 of the second static contacts 23 are located along the X-axis direction between the static contact points 20 and the coil winding 41. The eighth overcurrent part 34 is located along the Y-axis direction outside the movable contact group 72, and 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 member 6. The first static contact point 25 and the second static contact point 33 are respectively located along the Y-axis direction on both sides of the static flux guide 8. The projection of the part where all the static contact points 20 can contact the movable contact group 72 on the second projection plane perpendicular to the Y-axis direction is located within the projection of the static flux guide 8 on the second projection plane, and the surface of the static flux guide 8 facing the movable flux guide group 73 is closer to the movable flux guide group 73 along the X-axis direction than all the static contact points 20. The second surface S2 is closer to the movable flux guide group 73 than the first surface S1. The static flux guide 8 is oppositely arranged along the X-axis direction to the movable flux guide group 73. The static flux guide 8 is located along the X-axis direction between the third overcurrent part 27 and the movable flux guide group 73. In other embodiments, the static flux guide 8 can also be fixed relative to the limiting member 76 to play the same role. The two barriers 9 are respectively inserted into the corresponding barrier slots 17 and fixed to the accommodating member 6, so that the two barriers 9 are located along the Y-axis direction outside the static contact group 7. The first magnetic driving end 48 is located along the X-axis direction between the first attraction part 61 and the fourth attraction part 64. The second magnetic driving end 49 is located along the X-axis direction between the third attraction part 63 and the second attraction part 62. Each first movable contact point 88 is oppositely arranged along the X-axis direction to the corresponding first static contact point 25, and each second movable contact point 89 is oppositely arranged along the X-axis direction to the corresponding second static contact point 33. The limiting member 76 is fixed to the connecting member 71 to be fixed relative to the pushing member 70. The limiting member 76 can abut against the movable contact group 72 along the breaking direction X2. The elastic member 75 can abut against the accommodating member 6. The first guide part 103 and the second guide part 78 are both centrally located along the Y-axis direction between the first movable contact point 88 and the second movable contact point 89.

[0123] As shown in FIG. 26, the shell 10 and the cover 11 are fixed to form the accommodating member 6. The shielding cover 39 is placed in the accommodating member 6. The first guide part 103 located at the upper part along the Z-axis direction extends into the first slot section 14 of the slide groove 13 of the cover 11 along the Z-axis direction. The second guide part 78 located at the upper part along the Z-axis direction extends into the second slot section 15 of the slide groove 13 of the cover 11 along the Z-axis direction. The first guide part 103 located at the lower part along the Z-axis direction extends into the first slot section 14 of the slide groove 13 of the shell 10 along the Z-axis direction. The second guide part 78 located at the lower part along the Z-axis direction extends into the second slot section 15 of the slide groove 13 of the shell 10 along the Z-axis direction. Thus, each guide part 109 extends into the corresponding slide groove 13 along the Z-axis direction and is in sliding fit with the slide groove 13 along the X-axis direction. In the embodiment, the size of the first fit gap along the Y-axis direction between the first guide part 103 and the first slot section 14 is different from the size of the second fit gap along the Y-axis direction between the second guide part 78 and the second slot section 15. The first fit gap is smaller than the second fit gap. In the embodiment, the guide parts 109 are arranged on the movable contact part 4, and the slide grooves 13 are arranged on the accommodating member 6. In other embodiments, the guide parts 109 can be arranged on the accommodating member 6, and the slide grooves 13 can be arranged on the movable contact part 4.

[0124] Referring to FIG. 23, FIG. 23 shows the state of the relay 1 when the armature assembly 38 is located at the first position. As shown in FIG. 23, when the armature assembly 38 is located at the first position, the movable contact group 72 and the stationary contact group 7 are disconnected along the disconnecting direction X2, the relay 1 is in the off state, and the external circuit is disconnected. At this time, the elastic member 75 is in abutment against the abutment surface 18 along the disconnecting direction X2, the elastic member 75 is deformed to store energy. The limiting member 76 abuts against the movable contact group 72 along the disconnecting direction X2, each movable contact 85 is in abutment against the elastic support group 74, and the support body 94 of the elastic support 93 and the main body 98 of the elastic member 75 are relatively pushed against the fixing part 70 along the X-axis direction, so that the support body 94 and the elastic member 75 are fixed relative to the fixing part 70. The movable spring 83 abuts against the two stationary contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the off state.

[0125] When the coil assembly 37 drives the armature assembly 38 to move along the closing direction X1 after the coil winding 41 receives the first pulse electric signal, the armature assembly 38 drives the movable contact part 4 to move along the closing direction X1, in the process, the guide part 109 slides in the slide groove 13 along the closing direction X1 and guides the movable contact part 4. The elastic member 75 restores the deformation to release the energy. When the movable contact 87 abuts against the corresponding stationary contact 20, the fixing part 70 enters the overstroke, at this time, the elastic support group 74 is deformed to store energy, until the armature assembly 38 reaches the second position, the movable contact group 72 and the stationary contact group 7 are closed.

[0126] Referring to FIG. 24 and FIG. 26, FIG. 24 and FIG. 26 show the state of the relay 1 when the armature assembly 38 is in the second position. As shown in FIG. 24, when the armature assembly 38 is in the second position, the movable contact group 72 is closed with the stationary contact group 7 in the closing direction X1, the relay 1 is in the on state, and the external circuit is turned on. The third overcurrent portion 27 of the first stationary contact 22 forms a reverse flow portion, and the overcurrent direction of the reverse flow portion is opposite to the overcurrent direction of the overcurrent bridge 86. The eighth overcurrent portion 34 of the second stationary contact 23 forms a cross flow portion, and the overcurrent direction of the cross flow portion is the opening direction X2 when the overcurrent direction of the overcurrent bridge 86 is along the Y-axis direction to the right and the cross flow portion is located on the right side of the overcurrent bridge 86. The magnetic field formed by the current passing through the cross flow portion acts on the overcurrent bridge 86 with current passing through, so that the overcurrent bridge 86 is subjected to the first magnetic force F1 towards the stationary contact group 7. The elastic support group 74 deforms and stores energy along the X-axis direction. The elastic member 75 is away from the abutting surface 18 along the X-axis direction. The movable spring 83 is away from the two stationary contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the on state. As shown in FIG. 26, the current passing through the overcurrent bridge 86 forms an anti-short circuit magnetic loop M1 between the movable magnetic conductor 90 and the stationary magnetic conductor 8. In this embodiment, the number of anti-short circuit magnetic loops M1 is two. At the same time, the reverse flow magnetic field M2 formed by the current passing through the reverse flow portion formed by the third overcurrent portion 27 is in the same direction as the magnetic induction line formed by the anti-short circuit magnetic loop M1 on one side of the stationary magnetic conductor 8.

[0127] When the coil assembly 37 drives the armature assembly 38 to move in the opening direction X2 after the coil winding 41 receives the second pulse electrical signal, the armature assembly 38 drives the movable contact part 4 to move in the opening direction X2. In this process, the guide portion 109 slides in the sliding groove 13 in the opening direction X2 and guides the movable contact part 4. The elastic support group 74 recovers the deformation and releases the energy. The elastic member 75 deforms and stores energy after abutting against the abutting surface 18. Until it returns to the state shown in FIG. 23 that the armature assembly 38 is in the first position.

[0128] 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, and is more conducive to improving the safety distance between the movable contact group 72 and the stationary contact group 7.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] In the embodiment, the two attracting portions 60 of the armature assembly 38 can form a first part of the magnetic circuit without any air gap through the permanent magnet 50 and the two armatures 51, and the two magnetic driving ends 45 of the coil assembly 37 can also form a second part of the magnetic circuit through the entire coil assembly 37. In the magnetic holding state, the attracting portions 60 attract the corresponding magnetic driving ends 45 along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without any air gap, thus the magnetic loss is small, the magnetic efficiency is higher, and the movement stroke of the movable contact set 72 can be increased without increasing the power consumption of the coil assembly 37; and in the case of equivalent magnetic driving force, the power consumption required for the coil assembly 37 to achieve magnetic driving can be reduced, which is conducive to making the size of the coil assembly 37 smaller. Therefore, more favorable conditions can be created for increasing the safety distance between the movable contact set 72 and the static contact set 7 in a limited space.

[0134] In the embodiment, since the second part of the magnetic circuit passes through the entire coil assembly 37, compared with the direct-acting magnetic latching relay in the prior art, the magnetic acting force in the magnetic holding state is larger, and in particular, when the relay 1 is subjected to a fault large current impact, the armature assembly 38 is less likely to move out of the magnetic holding state, which is conducive to avoiding the destructive arc drawn by the movable contact set 72 from the static contact set 7 due to the fault large current.

[0135] 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 first position, the armature assembly 38 is in the magnetic holding state, 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 the 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 the second part of the pushing magnetic circuit through the entire coil assembly 37 is formed by the two magnetic driving ends 45 through the coil assembly 37, the first part and the second part of the pushing magnetic circuit constitute a complete pushing magnetic circuit, which only has a certain travel air gap and no other air gap, thus the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends 45 acting on the armature assembly 38 is stronger under the same power consumption, which is more conducive to increasing the safety distance between the movable contact set 72 and the static contact set 7. Similarly, when the coil assembly 37 is excited by a pulse electric signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed in the second position, the armature assembly 38 is in the magnetic holding state, and also has the same technical effects.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] In the embodiment, the two movable contact points 87 of the movable contact 85 are arranged along the Y-axis direction and fixed to the overcurrent bridge 86 extending along the Y-axis direction, so that the current passing through the overcurrent bridge 86 flows along the Y-axis direction, facilitating the formation of a magnetic loop for resisting short circuit, and the anti-short-circuit magnetic loop is used to make the movable contact group 72 more reliably closed with the static contact group 7, which is conducive to avoiding the movable contact group 72 from being separated from the static contact group 7 when the relay 1 bears a fault current, thereby avoiding destructive arc drawing to cause damage to the relay 1.

[0140] 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.

[0141] 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.

[0142] 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 current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from the fixed contact group 7, so as to avoid the destructive pull arc causing damage to the relay 1.

[0143] 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 current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from the fixed contact group 7, so as to avoid the destructive pull arc causing damage to the relay 1.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] In the embodiment, the overcurrent direction of the reverse flow part is opposite to the overcurrent direction of the overcurrent bridge 86, and the static magnetic conductor 8 is located between the reverse flow part and the moving magnetic conductor group 73 along the X-axis direction, so that the magnetic field generated by the reverse flow part is in the same direction as the magnetic field generated by the anti-short-circuit magnetic loop M1 on the side where the static magnetic conductor 8 is located, the magnetic field strength of the static magnetic conductor 8 is strengthened, and the magnetic force between the static magnetic conductor 8 and the moving magnetic conductor group 73 is stronger. When the relay 1 bears a fault large current, the moving contact group 72 is less likely to be separated from the static contact group 7, so as to avoid the relay 1 from being damaged by a destructive arc.

[0148] 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.

[0149] In the embodiment, the projections of the portions of all the static contacts 20 capable of contacting the movable contact group 72 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of the static magnetic conductor 8 on the second projection plane, and the surface of the static magnetic conductor 8 facing the movable magnetic conductor group 73 is closer to the movable magnetic conductor group 73 than all the static contacts 20 along the X-axis direction. Therefore, when the movable contact group 72 breaks the arc from the static contact group 7, the magnetic field generated by the two side arcs concentrates on the static magnetic conductor 8, so that the arc is not easy to spread to the two sides along the Y-axis direction, the arc escaping between the movable contact 87 and the static contact 20 can reduce the ablation of the surrounding container 6, and the service life of the relay 1 is ensured. On this basis, the distance between the two static contacts 20 along the Y-axis direction can be designed to be closer, which is beneficial to reducing the size of the container 6 along the Y-axis direction, and can create more favorable conditions for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0150] In the embodiment, the two blocking pieces 9 are fixed to the container 6 and located outside the static contact group 7 along the Y-axis direction. Each blocking piece 9 extends along the X-axis direction, so that the projections of the portions of each static contact 20 capable of contacting the movable contact 87 on a second projection plane perpendicular to the Y-axis direction are all located within the projection of each blocking piece 9 on the second projection plane. Therefore, when the movable contact group 72 breaks the arc from the static contact group 7, the arc will not conduct to the two side walls of the container 6 along the Y-axis direction, ensuring the insulation performance of the container 6. The blocking piece 9 is made of high-temperature-resistant insulating material, which can prevent the heat of the arc from damaging the blocking piece 9 when the load is large and the arc generates a lot of heat, avoiding the damage of the blocking piece 9, and is beneficial to improve the load capacity of the relay 1.

[0151] In the embodiment, the elastic support group 74 is arranged between the pushing piece 70 and the movable contact group 72, which can provide elastic force to the movable contact group 72 along the closing direction X1 after the pushing piece 70 experiences overtravel, so that the movable contact group 72 can be more reliably closed with the static contact group 7. When the relay 1 bears a fault current, the movable contact group 72 is less likely to be separated from the static contact group 7, thereby avoiding the damage of the relay 1 caused by destructive arc breaking. The elastic support group 74 can also generate additional repulsive force when the movable contact group 72 breaks from the static contact group 7, helping the movable contact 85 to disconnect with the static contact group 7.

[0152] In the embodiment, by arranging the limiting piece 76, the distance between the movable contact group 72 and the static contact group 7 when the movable contact group 72 is disconnected from the static contact group 7 can meet the design requirements.

[0153] In the embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, which avoids the errors that may be generated in the assembly process of the armature assembly 38 and the pushing piece 70, and also makes the pushing piece 70 and the armature assembly 38 have higher integration and fewer parts, which is beneficial to fully utilize the limited space.

[0154] 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.

[0155] 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 favorable for the two movable contact points 87 of the movable contactor 85 to reliably close the corresponding static contact point 20.

[0156] In the embodiment, the first elastic part 95 includes two first elastic arms 97 fixed with the overcurrent bridge 86, which is favorable for the movable contactor 85 to freely swing to adjust the posture. The positions where the two first elastic arms 97 are fixed with the back of the overcurrent bridge 86 respectively correspond to the positions of the movable contact points 87, so that the elastic force of the two first elastic arms 97 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.

[0157] 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 favorable for increasing the movement stroke of the movable contactor group 72, so as to be favorable for increasing the safety distance between the movable contactor group 72 and the static contactor group 7.

[0158] In the embodiment, the main body 98 of the elastic piece 75 is in a sheet shape and is fixed relative to the push piece 70, and the second elastic arm 101 extends to both sides of the Y-axis direction and can abut against the accommodating piece 6, so that the elastic piece 75 occupies a smaller 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 favorable for 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.

[0159] In the embodiment, by arranging the micro switch 5, the on-off state of the relay 1 can be known by an external relay state sensing circuit. It is convenient to manage the relay 1.

[0160] In the embodiment, the static contact terminal 110 is located between the moving spring 83 and the coil winding 41 along the X-axis direction, which can effectively utilize the space between the pushing member 70 and the coil winding 41, avoid increasing the size of the accommodating member 6 along the Y-axis direction when the static contact terminal 110 is arranged outside the coil assembly 37 along the Y-axis direction, and create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in limited space. The moving spring 83 is fixed to the pushing member 70, so that the position and action of the moving spring 83 are more determined.

[0161] In the embodiment, the shielding cover 39 is arranged to compress the magnetic field of the coil assembly 37 in the iron core 43 and the yoke 44, improve the magnetic field strength between the two magnetic driving ends 45, and be beneficial to improving the magnetic efficiency and the pushing force of the magnetic circuit part 3, which can create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in limited space, and also can avoid the influence of the external magnetic field on the magnetic circuit part 3.

[0162] In the embodiment, the guide part 109 extends into the sliding groove 13 along the Z-axis direction to slide with the sliding groove 13 along the X-axis direction. Since the extension direction of the part that can slide with the guide part 109 is perpendicular to the movement direction of the moving contact group 72, the part that can slide with the guide part 109 is much shorter than that in the prior art, is not easy to be deflected and deformed, and has better guiding effect than that in the prior art. On this basis, the size of the cooperation surface of the guide part 109 and the sliding groove 13 along the Y-axis direction can be shortened as much as possible to reduce the friction and the required driving force of the magnetic circuit part 3, so that the volume of the magnetic circuit part 3 can be reduced, which is beneficial to realizing the miniaturization of the relay 1.

[0163] In the embodiment, the guide part 109 is arranged in the middle along the Y-axis direction, which can save the space along the Y-axis direction compared with arranging the guide rods on both sides along the Y-axis direction, and avoid increasing the size of the relay 1 along the Y-axis direction. At the same time, the phenomenon that the moving contact part 4 is stuck during movement due to the non-parallel of the guide rods on both sides along the Y-axis direction can be avoided, the magnetic driving force of the magnetic circuit part 3 is not easy to be wasted on useless work, and thus the energy consumption of the coil assembly 37 can be reduced.

[0164] In the embodiment, the first guide part 103 is arranged on the limiting member 76, which means that the sliding groove 13 is arranged on the accommodating member 6. Since the static contact group 7 is fixed to the accommodating member 6, arranging the sliding groove 13 on the accommodating member 6 is beneficial to ensuring 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 guiding of the sliding groove 13 to the guide part along the X-axis direction is more accurate.

[0165] In the embodiment, the limiting member 76 abuts against the movable contactor set 72 before the pushing member 70 moves into the overstroke in the closing direction, and when the movable contact 87 abuts against the corresponding stationary contact 20 when the pushing member 70 moves into the overstroke, the first guide part 103 is arranged on the limiting member 76, which can better guide the movable contact 85 to move along the X-axis direction, so that the movable contact 87 correctly abuts against the stationary contact 20 along the X-axis direction, reduces the contact resistance between the movable contact 87 and the stationary contact 20, shortens the time length of the electric arc drawn when the movable contact 87 and the stationary contact 20 are disconnected, and is beneficial to increasing the service life of the movable contact 87 and the stationary contact 20.

[0166] In the embodiment, the two first guide parts 103 extend into the corresponding chute 13 along the Z-axis direction and are arranged along the Z-axis direction, which can support the limiting member 76 by the side wall of the chute 13 along the Y-axis direction when the Y-axis direction is the direction of gravity, and can avoid the limiting member 76 from deflecting in the plane perpendicular to the X-axis direction, which is beneficial to ensuring that the movable contact 87 correctly abuts against the stationary contact 20 along the X-axis direction.

[0167] In the embodiment, the first guide part 103 is located at the front part of the limiting body 102 along the closing direction X1, so that the first guide part 103 is closer to the movable contact 87 along the X-axis direction, which is more beneficial to the movable contact 87 to correctly abut against the stationary contact 20 along the X-axis direction, reduces the contact resistance between the movable contact 87 and the stationary contact 20, shortens the time length of the electric arc drawn when the movable contact 87 and the stationary contact 20 are disconnected, and is beneficial to increasing the service life of the movable contact 87 and the stationary contact 20.

[0168] In the embodiment, the projection of the first guide part 103 on the first projection plane is circular, which is beneficial to reducing the sliding friction between the first guide part 103 and the chute 13 along the X-axis direction, and can avoid the first guide part 103 and the chute 13 from being jammed.

[0169] In the embodiment, the material of the first guide part 103 is plastic, which is beneficial to avoiding the first guide part 103 from scratching the plastic material of the accommodating member 6 when the material of the first guide part 103 is metal, so that the contact resistance between the movable contact 87 and the stationary contact 20 can be prevented from being affected by the scratches falling on the movable contact 87 and the stationary contact 20. The material of the limiting body 102 is metal, so that the rigidity is stronger and the limiting effect on the movable contactor set 72 is better. The first guide part 103 and the limiting body 102 are integrally formed by insert injection molding or are bonded or threadedly connected, 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 can better slide along the X-axis direction with the chute 13.

[0170] In the embodiment, the first guide part 103 and the second guide part 78 cooperate with each other, which can better keep the moving contact part 4 moving along the X-axis direction by sliding along the chute 13 in the X-axis direction, and meanwhile avoid the whole formed by the pushing part 70 and the limiting part 76 fixed to each other from deflecting in the plane perpendicular to the Z-axis direction, which is beneficial to ensure that the moving contact point 87 correctly contacts the stationary contact point 20 along the X-axis direction.

[0171] In the embodiment, the two second guide parts 78 extend into the corresponding chute 13 from the pushing body 77 along the Z-axis direction and away from each other, which can support the pushing part along the Y-axis direction by the side wall of the chute 13 when the Y-axis direction is the direction of gravity. And it can avoid the pushing part 70 from deflecting in the plane perpendicular to the X-axis direction, which is beneficial to ensure that the moving contact point 87 correctly contacts the stationary contact point 20 along the X-axis direction.

[0172] In the embodiment, the projection of the second guide part 78 on the first projection plane is circular, which is beneficial to reduce the sliding friction between the second guide part 78 and the chute 13 along the X-axis direction and avoid the sliding cooperation between the second guide part 78 and the chute 13 from being jammed.

[0173] In the embodiment, each chute 13 is divided into a first slot segment 14 capable of sliding cooperation with the first guide part 103 and a second slot segment 15 capable of sliding cooperation with the second guide part 78; the first slot segment 14 and the second slot segment 15 are connected or separated along the X-axis direction, which can ensure that the first slot segment 14 and the second slot segment 15 are located on the straight line extending along the X-axis direction, which is beneficial to more effectively guide the movement of the moving contact part 72 along the X-axis direction.

[0174] In the embodiment, the first guiding portion 103 and the first matching gap formed between the chute 13 and the guiding portion 103 along the Y-axis direction are different from the second guiding portion 78 and the matching gap between the chute 13 and the guiding portion 78 along the Y-axis direction, which is conducive to reducing the difficulty of establishing the sliding matching gap between the first guiding portion 103 and the second guiding portion 78 and the chute 13, reducing the manufacturing precision requirement of the movable contact part 4 and the fixed part 2, and correctly guiding the movement of the movable contact part 4 along the Y-axis direction. This is because, if the first matching gap and the second matching gap are both small, the manufacturing precision requirement of the pusher 70 and the limiting piece 76 fixed to each other is high, and the matching precision requirement of the housing 10 and the cover 11 is also high, otherwise the first guiding portion 103 or the second guiding portion 78 cannot be inserted into the chute 13, so that the first guiding portion 103 and the second guiding portion 78 cannot establish the sliding matching relationship with the chute 13; if the first matching gap and the second matching gap are both large, the sliding matching between the accommodating piece 6 and the guiding portion 109 cannot correctly guide the movement of the movable contact part 4 along the X-axis direction, and the movable contact part 4 can be deflected in the plane perpendicular to the Z-axis direction. Therefore, the first matching gap is different from the second matching gap, which can not only reduce the manufacturing precision requirement of the movable contact part 4 and the fixed part 2 due to the existence of the relatively large matching gap, but also correctly guide the movement of the movable contact part 4 along the Y-axis direction due to the existence of the relatively small matching gap.

[0175] In the embodiment, the first matching gap is smaller than the second matching gap. Since the first guiding portion 103 is closer to the movable contact group 72 along the X-axis direction, on the basis of being able to reduce the manufacturing precision requirement of the movable contact part 4 and the fixed part 2, compared with the scheme that the first matching gap is larger than the second matching gap, the movable contact 85 can be better guided to move along the X-axis direction, so that the movable contact point 87 correctly abuts against the stationary contact point 20 along the X-axis direction, reduces the contact resistance between the movable contact point 87 and the stationary contact point 20, shortens the time length of the electric arc when the movable contact point 87 and the stationary contact point 20 are disconnected, and is conducive to increasing the service life of the movable contact point 87 and the stationary contact point 20.

[0176] Embodiment two

[0177] The embodiment provides an ammeter (not shown in the figure) which uses the above-mentioned relay and inherits all the advantages of the above-mentioned relay.

[0178] 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.

[0179] The technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0180] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A relay comprising: a fixed part comprising a housing and a fixed contact group fixed to each other; and a movable contact part capable of moving relative to the fixed part along an X-axis direction, the movable contact part comprising a movable contact group capable of closing or opening with the fixed contact group along the X-axis direction; characterized in that: one of the housing and the movable contact part is provided with a sliding groove, and the other is provided with a guide part; the sliding groove extends along the X-axis direction, and the guide part extends into the sliding groove along a Z-axis direction to slide with the sliding groove along the X-axis direction. the fixed contact group comprises two fixed contacts; the movable contact group comprises a movable contact provided with an overcurrent bridge and a movable contact point, both ends of the overcurrent bridge along a Y-axis direction are provided with the movable contact points, the movable contact points are capable of abutting against the corresponding fixed contact along a closing direction, and the movable contact points are capable of moving away from the corresponding fixed contact along an opening direction, both the closing direction and the opening direction are the X-axis direction; 2. A relay according to claim 1, c h a r a c t e r i z e d in that the guide part is centrally located between the two movable contact points of the movable contact along the Y-axis direction. the movable contact part further comprises a pusher, an elastic support group and a limiting piece; the pusher moves along the X-axis direction to drive the movable contact group to close or open with the fixed contact group along the X-axis direction; the elastic support group is arranged between the pusher and the movable contact group along the X-axis direction; the limiting piece is fixed relative to the pusher and abuts against the movable contact group along the opening direction when the movable contact group is opened with the fixed contact group; the guide part comprises a first guide part, and the first guide part is arranged on the limiting piece.

3. A relay according to claim 2, wherein the magnetic field generated by the coil is arranged to be substantially uniform across the face of the armature. the limiting piece is further provided with a limiting body fixed to the first guide part, the limiting body is provided with a limiting part and two connecting parts, the limiting part and the two connecting parts are an integral structure, the limiting part is capable of abutting against the overcurrent bridge, and the two connecting parts respectively extend from both ends of the limiting part along the Z-axis direction along the opening direction and are connected with the pusher.

4. A relay according to claim 3, wherein the magnetic field generated by the coil is arranged to be substantially uniform across the face of the armature. the movable contact part further comprises a connecting piece, the connecting piece is integrally formed with the pusher by insert injection molding; the connecting piece extends along the Z-axis direction, both ends of the connecting piece respectively extend out of the pusher to form two connecting ends; the two connecting parts are respectively connected with the two connecting ends.

5. A relay according to claim 4, wherein the magnetic field generated by the coil is arranged to be substantially uniform across the face of the armature. the number of the first guide parts is two, and the number of the sliding grooves is two; the two first guide parts extend into the corresponding sliding grooves from the limiting body along the Z-axis direction away from each other, and the two first guide parts are arranged along the Z-axis direction.

6. A relay according to claim 4, wherein the magnetic circuit is formed by a magnetic core (2) and a magnetic yoke (3). the first guide part is located at the front part of the limiting body along the closing direction.

7. A relay according to claim 6, wherein the relay is a latching relay. the projection of the first guide part on a first projection plane perpendicular to the Z-axis direction is circular.

8. A relay according to claim 3, wherein the magnetic circuit is formed by a magnetic core and a magnetic yoke, and the magnetic core is disposed in the magnetic yoke. the material of the first guide part is plastic, the material of the limiting body is metal, and the first guide part and the limiting body are integrally formed by insert injection molding, or are bonded or threadedly connected.

9. A relay according to claim 4, wherein the magnetic circuit is formed by a magnetic core (2) and a magnetic yoke (3). the guide part further comprises a second guide part; the second guide part is arranged on the pusher.

10. A relay according to claim 3, wherein the relay is a relay according to claim 1 or 2, characterized in that ​ 11. A relay according to claim 10, wherein the relay is a latching relay. The pushing member further comprises a pushing body, the second guide portions are two in number, and the two second guide portions extend into the corresponding sliding grooves from the pushing body and away from each other in the Z-axis direction, and the two second guide portions are arranged in the Z-axis direction.

12. A relay according to claim 10, wherein the relay is a latching relay. The second guide portion is circular in projection on a first projection plane perpendicular to the Z-axis direction.

13. A relay according to claim 10, wherein the relay is a latching relay. Each sliding groove is divided into a first groove segment capable of slidingly cooperating with the first guide portion and a second groove segment capable of slidingly cooperating with the second guide portion; the first groove segment and the second groove segment are connected or separated along the X-axis direction.

14. A relay according to claim 10, wherein the relay is a latching relay. The first guide portion and the sliding groove form a first cooperation gap along the Y-axis direction, and the second guide portion and the sliding groove form a second cooperation gap along the Y-axis direction, the size of the first cooperation gap being different from the size of the second cooperation gap.

15. A relay according to claim 14, wherein the relay is a latching relay. The first cooperation gap is smaller than the second cooperation gap.

16. A relay according to claim 3, wherein Further comprising a magnetic circuit part, the magnetic circuit part comprising: an armature assembly fixedly connected with the pushing member, the armature assembly comprising a permanent magnet and two armatures, the two armatures being fixedly connected with two magnetic poles of the permanent magnet, respectively; and a coil assembly provided with two magnetic driving ends, the coil assembly being excited by a pulse electric signal to reversely switch 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 in the X-axis direction.

17. A relay according to claim 16, wherein the relay is a latching relay. Each armature is provided with two suction portions arranged in the X-axis direction, the two suction portions being arranged corresponding to the two magnetic driving ends, respectively, and the suction portions being capable of suctioning the corresponding magnetic driving ends in the X-axis direction.

18. A relay according to claim 17, wherein the relay is a miniature relay. The projections of the two armatures on a first projection plane perpendicular to the Z-axis direction cross each other; and the two magnetic driving ends are arranged in the Y-axis direction.

19. A relay according to claim 18, wherein the two The armatures are a first armature and a second armature, respectively, the two suction portions of the first armature are a first suction portion and a second suction portion, respectively, and the two suction portions of the second armature are a third suction portion and a fourth suction portion, respectively; The armature assembly moves in the X-axis direction between a first position and a second position; in the first position, the first suction portion and the third suction portion suction the two magnetic driving ends, respectively, so as to disconnect the moving contactor group and the stationary contactor group; in the second position, the fourth suction portion and the second suction portion suction the two magnetic driving ends, respectively, so as to close the moving contactor group and the stationary contactor group.

20. An electrical meter, characterized by The relay comprises the relay according to any one of claims 1 to 19.

Images