Relay and electricity meter

Abstract

The present application relates to a relay and an electricity meter. The relay comprises a fixed part (2) and a movable contact part (4). The movable contact part (4) moves relative to the fixed part (2) in an X-axis direction such that a movable contact (87) comes into contact with or separates from a static contact in the X-axis direction. One of the fixed part (2) and the movable contact part (4) is provided with slide slots (13), and the other of the fixed part (2) and the movable contact part (4) is provided with guide portions (109). The slide slots (13) extend in the X-axis direction, and the guide portions (109) extend into the slide slots (13) in a Y-axis direction and are in sliding fit with the slide slots (13) in the X-axis direction. At least one guide portion (109) is a first guide portion. The two sides of the first guide portion in a Z-axis direction are provided with abutting portions capable of abutting against side walls of the corresponding slide slot (13) in the Z-axis direction, the two sides of each abutting portion in the X-axis direction are both adjacent to a deviation correction portion, each deviation correction portion forms a first projection on a first projection plane perpendicular to the Y-axis direction, the outer edge of the first projection is a convex curve, and the radius of curvature of the convex curve is greater than half of the dimension of the first guide portion in the Z-axis direction. The electricity meter comprises the relay.

Description

A relay and an electric meter

[0001] Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410725034.0, filed on June 5, 2024, and entitled “A relay and an electric meter”, 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, in particular to a relay and an electric meter. BACKGROUND

[0004] The relay in the prior art comprises a fixed part, a movable contact part and a magnetic circuit part. The fixed part comprises a housing and a stationary contact group. In an alternative configuration, the stationary contact group comprises two stationary contacts fixed to the housing and used for connecting an external circuit to a power supply and a load respectively. Each stationary contact is provided with a stationary contact point, and the stationary contact points of the two stationary contacts are arranged along the Z-axis. In this configuration, the movable contact part comprises a movable contact group, a pusher, an elastic support group and a limiting member. The pusher is generally formed by plastic injection molding to electrically isolate the magnetic circuit part and the movable contact group from each other. The movable contact group generally comprises at least one movable contact provided with an overcurrent bridge extending along the Z-axis and two movable contact points arranged along the Z-axis and fixed to the overcurrent bridge. The two movable contact points abut against the stationary contact points on the corresponding stationary contact in the closing direction and move away from the stationary contact points on the corresponding stationary contact in the opening direction, both of which are in the X-axis direction and away from each other. The pusher moves in the X-axis direction to drive the movable contact points to close or open with the stationary contact points in the X-axis direction. The elastic support group is arranged between the pusher and the movable contact group in the X-axis direction, which stores energy when the movable contact points close with the stationary contact points, and releases energy when the movable contact points open from the stationary contact points. The limiting member is fixed relative to the pusher and abuts against the movable contact in the opening direction when the movable contact points open from the stationary contact points, to limit the distance between the movable contact points and the stationary contact points. The magnetic circuit part is used to drive the pusher to move in the X-axis direction. The magnetic circuit part in the prior art generally has a magnetic holding function to reduce energy consumption. In the prior art, the magnetic circuit part with the magnetic holding function includes 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, a core and two yokes. The core is arranged in the coil winding, and the two yokes are fixed to the two ends of the core, and the ends of the two yokes away from the core form two magnetic driving ends arranged in the first direction. The armature assembly comprises a permanent magnet and two armatures, which are arranged in a H-shaped layout, and the two armatures are parallel to each other and sandwich the permanent magnet therebetween. The coil winding is excited by a pulse electrical signal to reverse the polarity of the two magnetic driving ends temporarily formed, so that the two magnetic driving ends attract different parts of the armature assembly in the X-axis direction and 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 in the X-axis direction through a swing arm. The straight type magnetic circuit part comprises a coil winding, a stationary core, a yoke plate, a yoke cylinder, a permanent magnet and an armature. The coil winding, the stationary 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 stationary core. The armature is generally fixed to the pusher to drive the pusher to move in 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 part of a sphere or part of a spheroid. If the moving contact and the stationary contact are misaligned with each other in the Z-axis direction and / or the Y-axis direction, the parts in contact with each other when the moving contact and the stationary contact are in contact 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 separate from the stationary contact and the position of the arc between the moving contact and the stationary contact uncertain, the arc lasts longer, and the service life of the moving contact and the stationary contact is adversely affected. To solve this problem, the relay generally has two guide rods on both sides of the moving contact part in the Z-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 is slidably connected with the guide rods in the X-axis direction. In practice, the guiding effect of the above guide structure is still 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 with 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 and a moving contact part, the fixed part is provided with a stationary contact, the moving contact part is provided with a moving contact, the moving contact part is moved relative to the fixed part in the X-axis direction to make the moving contact close or open to the stationary contact in the X-axis direction; one of the fixed part and the moving contact part is provided with a sliding groove, and the other is provided with a guide part; the sliding groove extends in the X-axis direction, and the guide part extends into the sliding groove in the Y-axis direction and slidably connects with the sliding groove in the X-axis direction; at least one of the guide parts is a first guide part, the first guide part is provided with a contact part on both sides of the Z-axis direction, which can contact the side groove wall of the sliding groove in the Z-axis direction, the contact part is adjacent to a correction part on both sides of the X-axis direction, the correction part forms a first projection in a first projection plane perpendicular to the Y-axis direction, and the outer edge of the first projection is a convex curve and the radius of curvature is greater than half the size of the first guide part in the Z-axis direction.

[0008] According to some embodiments of the present application, at least one of the first guide parts forms a second projection on the first projection plane, and the second projection is an ellipse with the long axis extending in the X-axis direction.

[0009] According to some embodiments of the present application, the first guide part is an ellipsoid.

[0010] According to some embodiments of the present application, the first guide part is an elliptic cylinder.

[0011] According to some embodiments of the present application, the contact part is a plane perpendicular to the Z-axis direction.

[0012] According to some embodiments of the present application, the guide portions include only a second guide portion in addition to the first guide portion, and the second guide portion forms a third projection on the first projection plane, and the third projection is circular.

[0013] According to some embodiments of the present application, the at least one sliding groove is a first sliding groove, and the first sliding groove is provided with the protrusion on the groove bottom, and the protrusion protrudes from the groove bottom along the Y-axis direction and extends along the X-axis direction.

[0014] According to some embodiments of the present application, the first sliding groove is provided with a recess between the protrusion and the side groove wall on both sides of the first sliding groove.

[0015] According to some embodiments of the present application, the number of the first sliding grooves is at least two, and the openings of the at least two first sliding grooves face or are away from each other along the Y-axis direction.

[0016] According to some embodiments of the present application, the first sliding grooves with the openings facing or being away from each other along the Y-axis direction are arranged along the Y-axis direction.

[0017] According to some embodiments of the present application, the fixed part includes a receiving member and a static contact group fixed to each other, the static contact group includes two static contacts, and the static contact points are arranged on the static contacts along the Z-axis direction; the movable contact part includes a movable contact group, a pushing member, an elastic support group and a limiting member; the movable contact group includes a movable contact, and the movable contact is provided with the movable contact points at both ends along the Z-axis direction, and the movable contact points can be closed or disconnected with the static contact points of the corresponding static contacts along the X-axis direction; the pushing member moves along the X-axis direction to drive the movable contact points to be closed or disconnected with the static contact points along the X-axis direction; the elastic support group is arranged between the pushing member and the movable contact group along the X-axis direction; the limiting member is fixed relative to the pushing member and abuts against the movable contact along the disconnection direction when the movable contact points are disconnected with the static contact points; at least one guide portion is arranged corresponding to the limiting member, and the guide portion arranged corresponding to the limiting member is referred to as a proximal guide portion.

[0018] According to some embodiments of the present application, the proximal guide portion is a first guide portion.

[0019] According to some embodiments of the present application, at least two proximal guide portions are arranged along the Z-axis direction.

[0020] According to some embodiments of the present application, at least two proximal guide portions are arranged along the Y-axis direction and extend into the corresponding sliding grooves away from each other along the Y-axis direction.

[0021] According to some embodiments of the present application, the number of the proximal guide portions is two, and the two proximal guide portions are centrally located between the movable contact points at the two ends of the movable contact along the Z-axis direction.

[0022] According to some embodiments of the present application, the limiting member is further provided with a limiting body fixedly connected with the first guide portion, the limiting body is provided with a limiting portion and two connecting portions, the limiting portion and the two connecting portions are integrated structure, the limiting portion is capable of abutting against the movable contact along the disconnecting direction, the two connecting portions respectively extend from the limiting portion along the two ends of the Y-axis direction along the disconnecting direction and are fixedly connected with the pushing member, and the proximal guide portion extends from the connecting portion along the Y-axis direction.

[0023] According to some embodiments of the present application, the material of the limiting member is metal, and the proximal guide portion is stamped and formed on the connecting portion.

[0024] According to some embodiments of the present application, the material of the limiting body is metal, the materials of the proximal guide portion and the accommodating member are plastic, and the proximal guide portion is integrally formed with the limiting body by insert injection molding, is bonded with the limiting body, or is threadedly connected with the limiting body.

[0025] According to some embodiments of the present application, at least one guide portion is arranged on the pushing member, and the guide portion arranged on the pushing member is referred to as a distal guide portion.

[0026] According to some embodiments of the present application, the distal guide portion is a first guide portion.

[0027] According to some embodiments of the present application, at least one proximal guide portion and one distal guide portion extend into the corresponding chute along the Y-axis direction and away from each other.

[0028] According to some embodiments of the present application, at least two distal guide portions are arranged along the Z-axis direction.

[0029] According to some embodiments of the present application, at least two distal guide portions are arranged along the Y-axis direction and extend into the corresponding chute along the Y-axis direction and away from each other.

[0030] According to some embodiments of the present application, the number of the distal guide portions is two, and the two distal guide portions are centrally located between the movable contact points at the two ends of the movable contact along the Z-axis direction.

[0031] According to some embodiments of the present application, the guide portions include two precisely-fitted guide portions and at least one non-precisely-fitted guide portion, the two precisely-fitted guide portions are arranged along the Y-axis direction and extend into the corresponding sliding grooves away from each other along the Y-axis direction, and the fitting gap formed between the precisely-fitted guide portions and the corresponding sliding grooves along the Z-axis direction is smaller than the fitting gap formed between the non-precisely-fitted guide portion and the corresponding sliding groove along the Z-axis direction.

[0032] According to some embodiments of the present application, the guide portions include two precisely-fitted guide portions and at least one non-precisely-fitted guide portion, the two precisely-fitted guide portions are arranged along the Y-axis direction and extend into the corresponding sliding grooves away from each other along the Y-axis direction, and the fitting gap formed between the precisely-fitted guide portions and the corresponding sliding grooves along the Z-axis direction is smaller than the fitting gap formed between the non-precisely-fitted guide portion and the corresponding sliding groove along the Z-axis direction.

[0033] According to some embodiments of the present application, the precisely-fitted guide portions are the first guide portions.

[0034] According to some embodiments of the present application, the precisely-fitted guide portions are the proximal guide portions.

[0035] According to some embodiments of the present application, the precisely-fitted guide portions are centrally located between the moving contact points at the two ends of the moving contact along the Z-axis direction.

[0036] According to some embodiments of the present application, the guide portions include two non-precisely-fitted guide portions arranged along the Y-axis direction and extending into the corresponding sliding grooves away from each other along the Y-axis direction, and the fitting gap between the two non-precisely-fitted guide portions and the corresponding sliding grooves along the Y-axis direction is smaller than the fitting gap between the two precisely-fitted guide portions and the corresponding sliding grooves along the Y-axis direction.

[0037] According to some embodiments of the present application, further comprising a magnetic circuit portion, the magnetic circuit portion includes: an armature assembly fixedly connected with the pushing member and including a permanent magnet and two armatures, the two armatures are respectively fixedly connected with two magnetic poles of the permanent magnet; and a coil assembly provided with the two magnetic driving ends, the coil assembly is excited by a pulse electric signal to reverse the polarity temporarily formed by the two magnetic driving ends, so as to switch the different positions of the two armatures in the X-axis direction and drive the armature assembly to move along the X-axis direction.

[0038] According to some embodiments of the present application, the projections of the two armatures on the first projection plane intersect with each other, and the two magnetic driving ends are arranged along the Z-axis direction.

[0039] According to some embodiments of the present application, the armature assembly is integrally formed with the pusher insert by insert molding.

[0040] According to some embodiments of the present application, each of the armatures is provided with two attracting portions, the two attracting portions corresponding to the two magnetic driving ends, the attracting portions being capable of attracting the corresponding magnetic driving ends along the X-axis direction.

[0041] According to some embodiments of the present application, the two armatures are respectively a first armature and a second armature, the two attracting portions of the first armature are respectively a first attracting portion and a second attracting portion, the two attracting portions of the second armature are respectively a third attracting portion and a fourth attracting portion; the armature assembly moves between a first position and a second position along the X-axis direction; in the first position, the first attracting portion and the third attracting portion attract the two magnetic driving ends respectively, so as to disconnect the moving contact group and the stationary contact group; in the second position, the fourth attracting portion and the second attracting portion attract the two magnetic driving ends respectively, so as to connect the moving contact group and the stationary contact group.

[0042] According to various embodiments of the present application, an electric meter is also provided, comprising the relay of any of the above embodiments.

[0043] Compared with the prior art, the above scheme has the following beneficial effects:

[0044] In the prior art, the guide rod is in sliding fit with one of the moving contact part and the fixed part. Since the guide rod extends along the X-axis direction and the moving contact part moves along the X-axis direction, the part of the guide rod used for sliding fit is relatively long along the X-axis direction, and the length of the guide rod extending out of the moving contact part is also relatively long, which is easy to be flexed and deformed, and the guiding effect is not ideal. In the present application, the guiding part extends into the sliding groove along the Y-axis direction and is in sliding fit with the sliding groove along the X-axis direction. Since the direction in which the guiding part extends into the sliding groove is perpendicular to the movement direction of the moving contact part, the part of the guiding part used for sliding fit is much shorter than that in the prior art, and is not easy to be flexed and deformed, and the guiding effect is better than that in the prior art.

[0045] In the present application, since the guiding part extends into the sliding groove along the Y-axis direction, the size of the fit surface of the guiding part and the sliding groove can be set smaller than that in the prior art, the friction between the sliding groove and the guiding part can be reduced compared with the prior art, and the driving force required by the magnetic circuit part is smaller, so that the volume of the magnetic circuit part can be reduced, which is beneficial to realize the miniaturization of the relay.

[0046] In the present application, the outer edge of the first projection of the deviation rectifying portion on the first projection surface is a convex curve. Compared with other technical solutions, even if the first guide portion slightly deviates in the plane perpendicular to the Y-axis direction, the sliding fit between the first guide portion and the sliding groove is not prone to jamming, which is conducive to avoiding the need to increase the pushing force of the magnetic circuit part due to jamming, reducing the useless work of the magnetic circuit part, and thus reducing the power consumption of the coil assembly.

[0047] In the present application, the radius of curvature of the convex curve formed by the outer edge of the first projection is greater than half the size of the guide portion along the Z-axis direction. Not only is it conducive to avoiding jamming in the sliding fit between the first guide portion and the sliding groove, but compared with the comparative technical solution in which the radius of curvature is less than or equal to half the size of the guide portion along the Z-axis direction, it can better guide the movement of the moving contact portion along the X-axis direction, which is conducive to the correct closing of the moving contact and the stationary contact along the X-axis direction, thereby reducing the contact resistance between the moving contact and the stationary contact, shortening the length of time for which the moving contact draws an arc when breaking away from the stationary contact, and increasing the service life of the moving contact, the stationary contact, and the entire relay. Specifically, taking the case where the first guide portion is provided on the moving contact portion as an example, when the first guide portion slightly deviates relative to the fixed portion in the plane perpendicular to the Y-axis direction, compared with the comparative technical solution, the deviation rectifying portion can resist the side groove walls on both sides of the sliding groove up and down along the Z-axis direction at a very small deviation angle, and the side groove walls on both sides of the sliding groove can exert a reaction force on the deviation rectifying portion, which is conducive to causing the moving contact portion to deviate in the opposite direction, thereby achieving a deviation rectifying effect. This deviation rectifying effect can better guide the movement of the moving contact portion along the X-axis direction. Accordingly, in the case where the sliding groove is provided on the moving contact portion, when the sliding groove slightly deviates in the plane perpendicular to the Y-axis direction, compared with the comparative technical solution, the side groove walls on both sides of the sliding groove can resist the deviation rectifying portion up and down along the Z-axis direction at a very small deviation angle, and the deviation rectifying portion can exert a reaction force on the side groove walls on both sides of the sliding groove, which is conducive to causing the moving contact portion to deviate in the opposite direction, thereby achieving a deviation rectifying effect.

[0048] In the present application, since the first guide portion has a deviation rectifying function in the plane perpendicular to the Y-axis direction, the moving contact portion is allowed to use only the first guide portion to cooperate with the sliding groove. On this basis, if other guide portions are also used for other needs, by providing the first guide portion, the other guide portions can be allowed not to accurately cooperate with the corresponding sliding groove along the Z-axis direction, i.e., the other guide portions and the corresponding sliding groove are allowed to have a relatively large fit gap, thereby avoiding over-positioning and ensuring that the moving contact portion and the fixed portion can be assembled in place without being affected by manufacturing errors.

[0049] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present 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 present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be drawn for the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on the disclosed drawings.

[0051] Fig. 1 is a schematic diagram of the internal structure of the relay in Embodiment 1;

[0052] Fig. 2 is a perspective view of the relay in Embodiment 1;

[0053] Fig. 3 is a front view of the housing in Embodiment 1;

[0054] Fig. 4 is a perspective view of the cover in Embodiment 1;

[0055] Fig. 5 is a perspective view of the static contact set in Embodiment 1;

[0056] Fig. 6 is a perspective view of the static flux guide in Embodiment 1;

[0057] Fig. 7 is a front view of the static flux guide in Embodiment 1;

[0058] Fig. 8 is a bottom view of the magnetic circuit portion in Embodiment 1;

[0059] Fig. 9 is a front view of the magnetic circuit portion in Embodiment 1;

[0060] Fig. 10 is a front view of the armature assembly in Embodiment 1;

[0061] Fig. 11 is a left view of the armature assembly in Embodiment 1;

[0062] Fig. 12 is a perspective view of the shield in Embodiment 1;

[0063] Fig. 13 is a schematic diagram of the state of the magnetic circuit portion when the armature assembly is in a magnetic holding state at a first position in Embodiment 1;

[0064] Fig. 14 is a schematic diagram of the state of the magnetic circuit portion when the coil winding receives a first pulse electric signal in Embodiment 1;

[0065] Fig. 15 is a schematic diagram of the state of the magnetic circuit portion when the armature assembly moves to a second position in Embodiment 1;

[0066] Fig. 16 is a schematic diagram of the state of the magnetic circuit portion when the armature assembly is in a magnetic holding state at the second position in Embodiment 1;

[0067] Fig. 17 is a schematic diagram of the state of the magnetic circuit portion when the coil winding receives a second pulse electric signal in Embodiment 1;

[0068] Fig. 18 is a schematic diagram of the magnetic circuit part when the armature assembly moves to the first position in the first embodiment;

[0069] Fig. 19 is a front view of the movable contact part in the first embodiment;

[0070] Fig. 20 is a bottom view of the pusher and the connecting member in the first embodiment;

[0071] Fig. 21 is a perspective exploded view of the parts in the first embodiment;

[0072] Fig. 22 is a perspective view of the stopper in the first embodiment;

[0073] Fig. 23 is a schematic diagram of the internal structure of the relay when it is in the off state in the first embodiment;

[0074] Fig. 24 is a schematic diagram of the internal structure of the relay when it is in the on state in the first embodiment;

[0075] Fig. 25 is a front view of the relay in the first embodiment;

[0076] Fig. 26 is a sectional view taken along line A-A of Fig. 25;

[0077] Fig. 27 is a sectional view taken along line B-B of Fig. 25;

[0078] Fig. 28 is a schematic diagram of the internal structure of the relay in the second embodiment;

[0079] Fig. 29 is a schematic diagram of the internal structure of the relay in the third embodiment;

[0080] Fig. 30 is a schematic diagram of the internal structure of the relay in the fourth embodiment;

[0081] Fig. 31 is a schematic diagram of the internal structure of the relay in the fifth embodiment;

[0082] Fig. 32 is a schematic diagram of the internal structure of the relay in the sixth embodiment;

[0083] Fig. 33 is a schematic diagram of the internal structure of the relay in the seventh embodiment;

[0084] Fig. 34 is a schematic diagram of the internal structure of the relay in the eighth embodiment;

[0085] Fig. 35 is a schematic diagram of the internal structure of the relay in the ninth embodiment;

[0086] Fig. 36 is a schematic diagram of the internal structure of the relay in the tenth embodiment;

[0087] Fig. 37 is a schematic diagram of the internal structure of the relay in the eleventh embodiment;

[0088] Fig. 38 is a schematic diagram of the internal structure of the relay in the twelfth embodiment;

[0089] Figure 39 is a schematic diagram of the internal structure of the relay of Example XIII;

[0090] Figure 40 is a schematic diagram of the internal structure of the relay of Example XIV.

[0091] 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, left sliding groove; 15, right sliding groove; 13a, protrusion; 13b, recess; 16, static magnetic conductor slot; 17, blocking member slot; 18, abutting surface; 19, static contact piece; 20, static contact point; 21, connection terminal; 22, first static contact piece; 23, second static contact piece; 24, first overcurrent part; 25, first static contact point; 26, second overcurrent part; 27, third overcurrent part; 28, fourth overcurrent part; 29, fifth overcurrent part; 30, sixth overcurrent part; 27a, measurement terminal; 31, first connection terminal; 32, seventh overcurrent part; 33, second static contact point; 34, eighth overcurrent part; 35, ninth overcurrent part; 36, second connection terminal; 37, coil assembly; 38, armature assembly; 39, shielding cover; 40, coil holder; 41, coil winding; 42, signal input terminal; 43, core; 44, yoke; 45, magnetic driving end; 46, first yoke; 47, second yoke; 48, first magnetic driving end; 49, second magnetic driving end; 50, permanent magnet; 51, armature; 52, first permanent magnet; 53, second permanent magnet; 54, magnetic pole; 55, first magnetic pole; 56, second magnetic pole; 57, first armature; 58, second armature; 59, mutually intersecting part; 60, attraction part; 61, first attraction part; 62, second attraction part; 63, third attraction part; 64, fourth attraction part; 65, first shielding member; 66, second shielding member; 67, partition wall; 68, connecting wall; 69, recess; 70, pushing member; 71, connecting member; 72, moving contact piece group; 73, moving magnetic conductor group; 74, elastic support group; 75, elastic member; 76, limiting member; 77, pushing body; 78, far guiding part; 79, accommodating part; 80, first embedded part; 81, second embedded part; 82, connecting column; 83, moving spring; 84, connecting end; 85, moving contact piece; 86, overcurrent bridge; 87, moving contact point; 88, first moving contact point; 89, second moving contact point; 90, moving magnetic conductor; 91, magnetic conductor body; 92, extension part; 93, elastic support; 94, frame body; 95, first elastic part; 96, first connecting hole; 97, first elastic arm; 98, main body; 99, second elastic part; 100, second connecting hole; 101, second elastic arm; 102, limiting body; 103, near guiding part; 104, limiting part; 105, connecting part; 106, avoiding hole; 107, assembly hole; 109, guiding part; 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

[0092] The technical solutions in the embodiments of the present application will be described clearly and completely in the following 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 the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0093] In the claims and the description of the embodiments, 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 Z-axis direction and also perpendicular to the Y-axis direction. The X-axis direction can be divided into left and right, and 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 right to left. 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 left to right. The Y-axis direction can be divided into front and back. The Z-axis direction can be divided into up and down.

[0094] In the claims and the description of the embodiments, the terms "first", "second" or "third" and the like are used only to distinguish different objects, rather than to describe a particular order.

[0095] In the claims and the description of the embodiments, the terms "fixedly connected" or "fixedly connected" or "relatively fixed" should be understood broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes irremovable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0096] In the claims and the description of the embodiments, the terms "including", "having" and their variants mean "including but not limited to".

[0097] In the claims and the description of the embodiments, the term "provided with" means that the technical feature located after it is part of the technical feature located before it.

[0098] In the claims and the description of the embodiments, the term "arranged along the direction" means that more than two features are distributed along the direction, and are in the same position in the other two directions perpendicular to the direction.

[0099] In the claims and specification, the term "set" means a collection of elements, which can include one element or more than one element, unless otherwise defined, for example, the "set of movable contact" can include one movable contact or more than one movable contact.

[0100] In the claims and specification, the term "temporarily formed" means the polarity of the magnetic drive end formed by the pulse electrical signal disappears with the disappearance of the pulse electrical signal, unless otherwise defined.

[0101] In the claims and specification, the term "reversal" means the polarity of the magnetic drive end temporarily formed this time is opposite to the polarity of the magnetic drive end temporarily formed last time, unless otherwise defined. Of course, those skilled in the art should understand that for the magnetic latching relay, if the pulse electrical signal received by the coil assembly this time is the same as the pulse electrical signal received last time in the current direction, the pulse electrical signal received this time is meaningless for control, and the state of the relay will not change.

[0102] In the claims and specification, the term "back surface" means the surface facing away from the set of stationary contacts, unless otherwise defined.

[0103] In the claims and specification, the term "mounted" means connected directly or indirectly to each other, unless otherwise defined.

[0104] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings.

[0105] Embodiment One

[0106] Referring to FIG. 1, FIG. 1 shows the structure of the relay 1 in the embodiment. The relay 1 is used to receive an electrical signal to control the on-off of an external circuit. The relay 1 in the embodiment is a magnetic latching relay, which is used to receive a pulse electrical signal to control the on-off of an external circuit. In the embodiment, the pulse electrical signal can be divided into a first pulse electrical signal and a second pulse electrical signal. The first pulse electrical signal is used to control the conduction of the external circuit correspondingly, and the second pulse electrical signal is used to control the off of the external circuit correspondingly. After receiving the first pulse electrical signal, the relay 1 switches from the off state to the on state, and after the disappearance of the first pulse electrical signal, the relay 1 remains in the on state until the second pulse electrical signal is received. After receiving the second pulse electrical signal, the relay 1 switches from the on state to the off state, and after the disappearance of the second pulse electrical signal, the relay 1 remains in the off state until the first pulse electrical signal is received. In the embodiment, the external circuit is a single-phase alternating current circuit. The relay 1 needs to control the on-off of the single-phase alternating current circuit. In other embodiments, the relay 1 can also be configured as a multi-phase and used to control the on-off of a multi-phase alternating current circuit.

[0107] Referring to FIG. 1, FIG. 1 shows the structure of the relay 1 in the embodiment. As shown in FIG. 1, the relay 1 comprises a fixed part 2, a magnetic circuit part 3, a movable contact part 4 and a micro switch 5. The fixed part 2 is fixed relative to each other and can serve as the movement reference of the movable contact part 4. The magnetic circuit part 3 is used to receive a pulse electrical signal and drive the movable contact part 4 to move based on the pulse 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.

[0108] As shown in FIG. 1, the fixed part 2 comprises a housing 6, a stationary contact group 7, a stationary magnetic conductor 8 and a blocking piece 9.

[0109] Referring to FIG. 2, FIG. 2 shows the housing 6 in the embodiment. As shown in FIG. 2, the housing 6 is made of plastic and comprises a shell 10 and a cover 11.

[0110] Referring to FIG. 3 and FIG. 27, FIG. 3 and FIG. 27 show the shell 10 in the embodiment. As shown in FIG. 3, the shell 10 is provided with a cavity 12 which is open forward along the Y-axis direction and is used to accommodate the stationary contact group 7, the stationary magnetic conductor 8, the blocking piece 9, the magnetic circuit part 3, the movable contact part 4 and the micro switch 5. The rear wall of the shell 10 is provided with a sliding groove 13 in the middle along the Z-axis direction, the sliding groove 13 extends along the X-axis direction and is divided into a left sliding groove 14 and a right sliding groove 15. The left sliding groove 14 is located on the left side of the right sliding groove 15. In the embodiment, the left sliding groove 14 and the right sliding groove 15 of the shell 10 are separated from each other along the X-axis direction, and in other embodiments, the left sliding groove 14 and the right sliding groove 15 of the shell 10 can be arranged to be connected to each other along the X-axis direction. As shown in FIG. 3 and FIG. 27, the sliding groove 13 of the shell 10 in the embodiment is a first sliding groove, the groove bottom of the first sliding groove is provided with a protrusion 13a which protrudes from the groove bottom along the Y-axis direction and extends along the X-axis direction, and the protrusion 13a of the first sliding groove is provided with a recess 13b between the side groove walls on both sides of the first sliding groove. In the embodiment, the left sliding groove 14 and the right sliding groove 15 on the shell 10 are both first sliding grooves. The left side of the left sliding groove 14 is provided with a stationary magnetic conductor groove 16. The upper and lower parts of the left sliding groove 14 along the Z-axis direction are respectively provided with a blocking piece groove 17. The right sides of the two blocking piece grooves 17 are respectively provided with an abutting surface 18 which is arranged towards the left.

[0111] Referring to FIG. 4 and FIG. 27, the cover 11 in the present embodiment is shown. As shown in FIG. 4, the cover 11 is fixedly connected with the shell 10 and used for covering the cavity 12. The cover 11 is also provided with the sliding groove 13 extending along the X-axis direction and divided into the left sliding groove 14 and the right sliding groove 15. The left sliding groove 14 of the cover 11 is correspondingly arranged along the Y-axis direction with the left sliding groove 14 of the shell 10, and the openings of the two are opposite to each other along the Y-axis direction. The right sliding groove 15 of the cover 11 is correspondingly arranged along the Y-axis direction with the right sliding groove 15 of the shell 10, and the openings of the two are opposite to each other along the Y-axis direction. In the present embodiment, the left sliding groove 14 and the right sliding groove 15 of the cover 11 are separated from each other along the X-axis direction, and in other embodiments, the left sliding groove 14 and the right sliding groove 15 of the cover 11 can be arranged to be connected with each other along the X-axis direction. As shown in FIG. 4 and FIG. 27, the sliding groove 13 on the cover 11 in the present embodiment is the first sliding groove, the groove bottom of the first sliding groove is provided with the protrusion 13a protruding from the groove bottom along the Y-axis direction and extending along the X-axis direction, and the protrusion 13a of the first sliding groove is provided with the recess 13b between the protrusion 13a and the side groove wall on both sides of the first sliding groove. In the present embodiment, the left sliding groove 14 and the right sliding groove 15 on the cover 11 are both the first sliding groove.

[0112] Referring to FIG. 5, FIG. 23 and FIG. 26, the static contact group 7 in the present 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 electrically connect with external circuit. For example, one of the two connecting terminals 21 is used to connect with power supply, and the other is used to connect with 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 present 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 right 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 points 25 is two, and the two first static contact points 25 are arranged along the Y-axis direction. The two first static contact points 25 extend rightward along the X-axis direction from the first surface S1 of the first overcurrent part 24. The second overcurrent part 26 extends leftward along the X-axis direction from the lower end of the first overcurrent part 24 along the Z-axis direction. The third overcurrent part 27 extends downward along the Z-axis direction from the left 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 along the Z-axis direction downward. As shown in FIG. 5, the rear part of the third overcurrent part 27 along the Y-axis direction is provided with a measuring terminal 27a extending backward along the Y-axis direction, as shown in FIG. 26, the measuring terminal 27a extends out of the accommodating member 6 backward along the Y-axis direction. As shown in FIG. 5, the fourth overcurrent part 28 extends rightward along the X-axis direction from the lower end of the third overcurrent part 27 along the Z-axis direction. The fifth overcurrent part 29 extends downward along the Z-axis direction from the right end of the fourth overcurrent part 28 along the X-axis direction. The sixth overcurrent part 30 extends rightward along the X-axis direction from the lower part of the fifth overcurrent part 29 along the Z-axis direction and from the rear end of the fifth overcurrent part 29 along the Y-axis direction. In the present embodiment, the part of the third overcurrent part 27 extending out of the accommodating member 6, the fourth overcurrent part 28, the fifth overcurrent part 29 and the sixth overcurrent part 30 constitute a first connecting terminal 31. The first connecting terminal 31 is the connecting terminal 21 of the first static contact 22. The second static contact 23 is provided with a seventh overcurrent part 32, a second static contact point 33, an eighth overcurrent part 34 and a ninth overcurrent part 35. The seventh overcurrent part 32 is provided with a first surface S1 facing right 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 points 33 is two, and the two second static contact points 33 are arranged along the Y-axis direction. The two second static contact points 33 extend rightward along the X-axis direction from the first surface S1 of the seventh overcurrent part 32. The eighth overcurrent part 34 extends rightward along the X-axis direction from the lower end of the seventh overcurrent part 32 along the Z-axis direction.The ninth flow portion 35 extends downward along the Z-axis direction from the right part of the eighth flow portion 34 along the X-axis direction and from the back end of the eighth flow portion 34 along the Y-axis direction. As shown in FIG. 23, the ninth flow portion 35 extends downward along the Z-axis direction out of the housing 6. In this embodiment, the ninth flow portion 35 constitutes a second connecting terminal 36. The second connecting terminal 36 is a connecting terminal 21 of the second static magnetic conductor 23. The second connecting terminal 36 can be used to install a mutual inductor. In this embodiment, two connecting terminals 21 are arranged along the X-axis direction and each extends out of the housing 6 along the Z-axis direction.

[0113] Referring to FIGS. 6 and 7, the static magnetic conductor 8 in this embodiment is shown. As shown in FIG. 6, the static magnetic conductor 8 extends along the Y-axis direction. As shown in FIG. 7, the surface of the static magnetic conductor 8 along the left of the X-axis direction forms a second surface S2. The second surface S2 is perpendicular to the X-axis direction.

[0114] Referring to FIG. 1, the barrier 9 in this embodiment is shown. In this embodiment, the number of the 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 Y-axis direction. Therefore, the two barriers 9 are both perpendicular to the Z-axis direction. The barrier 9 is made of a high-temperature-resistant insulating material. In this embodiment, a ceramic material is used.

[0115] Referring to FIG. 8, the magnetic circuit part 3 in this embodiment is shown. As shown in FIG. 8, the magnetic circuit part 3 includes a coil assembly 37, an armature assembly 38, and a shield 39.

[0116] Referring to FIGS. 8 and 9, the coil assembly 37 in the present embodiment is shown. As shown in FIGS. 8 and 9, the coil assembly 37 includes a coil frame 40, a coil winding 41, signal input terminals 42, a core 43, and yokes 44. The coil frame 40 is fixed to the housing 10. The coil frame 40 extends along the Z-axis direction and is provided with a central hole extending along the Z-axis direction. The coil frame 40 is provided with a baffle at each end along the Z-axis direction. The coil winding 41 is wound on the coil frame 40 and located between the two baffles. The axis of the coil winding 41 extends along the Z-axis direction. The two connection terminals of the coil winding 41 are connected to the three signal input terminals 42, which are used to receive the pulse electrical signal. The core 43 is placed in the central hole of the coil frame 40 and extends along the Z-axis direction. The number of the yokes 44 is two. The two yokes 44 are fixed to the two ends of the core 43 along the Z-axis direction, respectively, and the ends of the two yokes 44 away from the core 43 form magnetic driving ends 45, respectively. The two magnetic driving ends 45 are arranged along the Z-axis direction and extend close to each other along the Z-axis direction. The two yokes 44 are a first yoke 46 and a second yoke 47, respectively. The two magnetic driving ends 45 are a first magnetic driving end 48 and a second magnetic driving end 49, respectively. The first magnetic driving end 48 is formed on the first yoke 46, and the second magnetic driving end 49 is formed on the second yoke 47. The coil winding 41 is excited by the pulse electrical signal to reverse the polarity of the magnetic driving ends 45 temporarily formed, 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 the current direction opposite to that of the first pulse electrical signal, the coil winding 41 generates a second magnetic field, and the polarity of the first magnetic driving end 48 reverses to have S-pole polarity, and the polarity of the second magnetic driving end 49 reverses to have N-pole polarity. After the second pulse electrical signal disappears, the second magnetic field of the coil winding 41 disappears, and the first magnetic driving end 48 and the second magnetic driving end 49 no longer have the polarity generated based on the second magnetic field. The "temporarily formed" in the present embodiment refers to the polarity of the magnetic driving end 45 formed by the pulse electrical signal disappearing with the disappearance of the pulse electrical signal. The "reversal" in the present embodiment refers to that when the coil winding 41 receives the pulse electrical signal this time and the current direction of the pulse electrical signal is different from that of the pulse electrical signal received last time, the polarity of the magnetic driving end 45 temporarily formed this time is opposite to that of the magnetic driving end 45 temporarily formed last time.

[0117] Referring to FIG. 10 and FIG. 11, the armature assembly 38 in the embodiment is shown. The armature assembly 38 is driven by the coil assembly 37 to move along the X-axis direction between a first position and a second position. When the armature assembly 38 moves to the first position, the relay 1 is in an off state, and the external circuit is turned off. When the armature assembly 38 moves to the second position, the relay 1 is in an on state, and the external circuit is turned on. The first position is more right along the X-axis direction than the second position. As shown in FIG. 10 and FIG. 11, in the embodiment, the armature assembly 38 includes two permanent magnets 50 and two armatures 51. The two permanent magnets 50 are formed by magnetized magnetic steel, and in other embodiments, the two permanent magnets 50 can also use other permanent magnet materials, such as neodymium iron boron permanent magnets. In the embodiment, the two permanent magnets 50 are respectively a first permanent magnet 52 and a second permanent magnet 53. Each permanent magnet 50 is provided with two magnetic poles 54 with fixed polarity, and the two magnetic poles 54 are respectively a first magnetic pole 55 and a second magnetic pole 56. The first magnetic pole 55 and the second magnetic pole 56 have opposite polarities. For the convenience of introduction, it is assumed that the polarity of the first magnetic pole 55 is N pole, and the polarity of the second magnetic pole 56 is S pole. In the embodiment, the two magnetic poles 54 of each permanent magnet 50 are arranged along the X-axis direction. In the embodiment, the two permanent magnets 50 are arranged along the Z-axis direction. The first permanent magnet 52 is above along the Z-axis direction, and the second permanent magnet 53 is below along the Z-axis direction. The first magnetic pole 55 of the first permanent magnet 52 is left along the X-axis direction, and the second magnetic pole 56 is right along the X-axis direction. The first magnetic pole 55 of the second permanent magnet 53 is right along the X-axis direction, and the second magnetic pole 56 is left along the X-axis direction. The two armatures 51 are respectively a first armature 57 and a second armature 58. The first armature 57 is fixedly connected to the first magnetic poles 55 of the two permanent magnets 50. The second armature 58 is fixedly connected to the second magnetic poles 56 of the two permanent magnets 50. The projections of the two armatures 51 on the first projection plane perpendicular to the Y-axis direction intersect each other. The portions 59 where the two armatures 51 intersect each other form a spacing W along the Y-axis direction. Each armature 51 is provided with an attraction portion 60 on both sides along the Z-axis direction. The first armature 57 is provided with a first attraction portion 61 and a second attraction portion 62 on both sides along the Z-axis direction, the first attraction portion 61 is above along the Z-axis direction and left along the X-axis direction, and the second attraction portion 62 is below along the Z-axis direction and right along the X-axis direction. The second armature 58 is provided with a third attraction portion 63 and a fourth attraction portion 64 on both sides along the Z-axis direction, the third attraction portion 63 is below along the Z-axis direction and left along the X-axis direction, and the fourth attraction portion 64 is above along the Z-axis direction and right along the X-axis direction. Therefore, in the embodiment, the first attraction portion 61 and the third attraction portion 63 are arranged along the Z-axis direction, the fourth attraction portion 64 and the second attraction portion 62 are arranged along the Z-axis direction, the first attraction portion 61 and the fourth attraction portion 64 are arranged along the X-axis direction, and the third attraction portion 63 and the second attraction portion 62 are arranged along the X-axis direction. In the embodiment, the projection of the armature assembly 38 on the first projection plane perpendicular to the Y-axis direction is mirror symmetrical relative to the symmetry plane perpendicular to the Z-axis direction.

[0118] Referring to FIG. 8 and FIG. 12, the shielding cover 39 in the present embodiment is shown. As shown in FIG. 12, the shielding cover 39 comprises a first shielding member 65 and a second shielding member 66. The first shielding member 65 and the second shielding member 66 are inserted and fitted to form the shielding cover 39. The shielding cover 39 is provided with two shielding walls 67 and a connecting wall 68. Each shielding wall 67 is provided with a groove 69 at the left end thereof along the X-axis direction, the groove 69 extending along the X-axis direction and being located at the middle of the shielding wall 67 along the Z-axis direction. As shown in FIG. 8, the two shielding walls 67 are both arranged perpendicularly to the Z-axis direction. The two shielding walls 67 are arranged respectively in front of and behind the coil assembly 37 along the Y-axis direction. The connecting wall 68 is arranged perpendicularly to the X-axis direction and is used to connect the two shielding walls 67. The connecting wall 68 is arranged at the right side of the coil assembly 37 along the X-axis direction.

[0119] Referring to FIG. 13 to FIG. 18, the operation principle of the magnetic circuit part 3 in the present embodiment is shown.

[0120] As shown in FIG. 13, in the present embodiment, the armature assembly 38 is located between the arms of the two yokes 44 extending along the X-axis direction along the Z-axis direction. The first magnetic driving end 48 is located between the first attracting portion 61 and the fourth attracting portion 64 along the X-axis direction; the second magnetic driving end 49 is located between the third attracting portion 63 and the second attracting portion 62 along the X-axis direction.

[0121] Fig. 13 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. 13, 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.

[0122] Fig. 14 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. 14, 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.

[0123] Fig. 15 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. 15, 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.

[0124] Fig. 16 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. 16, 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. 15; 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. 15. 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 held at the second position relative to the coil assembly 37.

[0125] Fig. 17 shows the state of the magnetic circuit portion 3 when the coil assembly 37 just receives the second pulse electric signal in the present embodiment. As shown in Fig. 17, 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 portion 64 have the same S-pole polarity, the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction portion 64; since the second magnetic driving end 49 and the second attraction portion 62 have the same N-pole polarity, the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction portion 62. In addition, the magnetic circuit portion 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 portion 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 portion 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, and only has two stroke air gaps in the middle. The fourth push magnetic circuit also passes through the entire coil assembly 37 from the second magnetic driving end 49, through the stroke air gap, the third attraction portion 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 portion 61, the stroke air gap, the first magnetic driving end 48, the first yoke 46, the core 43, the second yoke 47, and returns to the second magnetic driving end 49, and only has two stroke air gaps in the middle. Therefore, when the coil assembly 37 just receives the second pulse electric signal, not only the first magnetic driving end 48 generates the magnetic repulsion force to the fourth attraction portion 64 and the second magnetic driving end 49 generates the magnetic repulsion force to the second attraction portion 62, but also the first magnetic driving end 48 generates the magnetic attraction force to the first attraction portion 61 and the second magnetic driving end 49 generates the magnetic attraction force to the third attraction portion 63 due to the existence of the third push magnetic circuit and the fourth 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 second position to the first position along the breaking direction X2.

[0126] Fig. 18 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. 18, 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. 13, 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. 13, 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. 13. 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.

[0127] 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. 13.

[0128] Referring to Fig. 19, Fig. 19 shows the movable contact part 4 in the present embodiment. As shown in Fig. 19, 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.

[0129] Referring to FIG. 20, the pushing member 70 and the connecting member 71 in the embodiment are shown. As shown in FIG. 20, in the embodiment, the armature assembly 38, the connecting member 71 and the moving spring 83 are fixedly connected with the pushing member 70, and the armature assembly 38, the connecting member 71 and the moving spring 83 are integrally formed with the pushing member 70 by insert injection molding. The pushing member 70 is made of plastic. The pushing member 70 is provided with a pushing body 77 and two far guiding portions 78. Referring to FIG. 21, the pushing 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 member 71 and is located at the left side of the receiving portion 79 along the X-axis direction. The left surface of the first insert portion 80 is provided with two connecting columns 82. The two connecting columns 82 are arranged along the Z-axis direction. Each connecting column 82 extends leftward from the left 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 at the right side of 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 far guiding portions 78 extend away from each other along the Z-axis direction from the pushing body 77. In the embodiment, the two far guiding portions 78 extend away from each other along the Y-axis direction from the front surface and the rear surface of the receiving portion 79 along the Y-axis direction, respectively, and the far guiding portion 78 is arranged at the middle part of the receiving portion 79 along the Z-axis direction and the middle part of the receiving portion 79 along the X-axis direction. The far guiding portion 78 is the second guiding portion, and the second guiding portion forms a third projection in a first projection plane perpendicular to the Y-axis direction, and the third projection is circular.

[0130] As shown in FIG. 20, the connecting member 71 extends along the Y-axis direction, and the two ends thereof along the Y-axis direction respectively extend out of the first insert portion 80 to form two connecting ends 84.

[0131] Referring to FIG. 21, FIG. 21 shows the moving contact set 72, the moving magnet set 73, the elastic support set 74, the elastic member 75 and the limiting member 76 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. 21, the moving contact set 72 includes two moving contacts 85. The two moving contacts 85 are arranged along the Y-axis direction and both ends along the Z-axis direction are arranged with moving contact points 87. Each moving contact 85 is provided with an overcurrent bridge 86 and two moving contact points 87. The overcurrent bridge 86 extends along the Z-axis direction. The two moving contact points 87 are arranged along the Z-axis direction and fixed to the overcurrent bridge 86, and each moving contact point 87 is arranged opposite to the corresponding stationary contact 20 along the X-axis direction. The moving contact point 87 opposite to the first stationary contact 25 along the X-axis direction is the first moving contact point 88; the moving contact point 87 opposite to the second stationary contact 33 along the X-axis direction is the second moving contact point 89. When the moving contact set 72 is closed with the stationary contact set 7, each first moving contact point 88 is closed with the corresponding first stationary contact 25 along the X-axis direction, each second moving contact point 89 is closed with the corresponding second stationary contact 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned on through the two moving contacts 85. When the moving contact set 72 is opened with the stationary contact set 7, each first moving contact point 88 is opened with the corresponding first stationary contact 25 along the X-axis direction, each second moving contact point 89 is opened with the corresponding second stationary contact 33 along the X-axis direction, and the first stationary contact 22 and the second stationary contact 23 are turned off.

[0132] The moving magnet set 73 is fixed opposite to the moving contact set 72 and arranged opposite to the stationary magnet 8 along the X-axis direction. As shown in FIG. 21, the moving magnet set 73 includes moving magnets 90, and the moving magnets 90 are arranged opposite to the moving contacts 85. In the present embodiment, the number of moving magnets 90 is two, and the two moving magnets 90 are arranged along the Y-axis direction. Each moving magnet 90 is provided with a magnet body 91 and two extension parts 92. The magnet body 91 extends along the Z-axis direction and is fixed to the back surface of the overcurrent bridge 86, where the "back surface" refers to the surface facing away from the stationary contact set 7. The extension part 92 extends along the X-axis direction from both ends of the magnet body 91 along the Y-axis direction.

[0133] The elastic support group 74 is arranged on the pushing member 70 and located between the pushing member 70 and the movable contact group 72 along the X-axis direction. As shown in FIG. 21, the elastic support group 74 includes elastic supports 93. In the embodiment, the number of the elastic supports 93 is two and arranged along the Y-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 provided one-to-one with 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 with the overcurrent bridge 86. The position where the first elastic arm 97 is fixedly connected with the back surface of the overcurrent bridge 86 corresponds to the movable contact 87.

[0134] 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. 21, the elastic member 75 is provided with a main body 98 and a second elastic part 99. The main body 98 is in the shape of a sheet perpendicular to the X-axis direction and is fixed relative to the pushing member 70. The main body 98 is provided with two second connecting holes 100 corresponding to the connecting columns 82. The connecting columns 82 pass through the second connecting holes 100 so that the main body 98 is positioned along any direction perpendicular to the X-axis direction relative to the pushing member 70. The main body 98 is located between the support body 94 and the first insert part 80 along the X-axis direction. The second elastic part 99 can be elastically deformed along the X-axis direction. The second elastic part 99 is provided one-to-one with the movable contact 85 in the movable contact group 72. The second elastic part 99 includes two second elastic arms 101. One end of each second elastic arm 101 is integrated with the main body 98. The other end extends to the two sides of the Z-axis direction and can abut against the corresponding abutting surface 18.

[0135] Referring to FIG. 22, the limit member 76 in the embodiment is shown. The limit member 76 is fixed relative to the pushing member 70 and abuts against the movable contactor group 72 to the right when the movable contactor group 72 is disconnected from the stationary contactor group 7, so as to limit the distance between the movable contactor group 72 and the stationary contactor group 7. As shown in FIG. 22, the limit member 76 is provided with a limit body 102 and two proximal 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 against each movable contact 85 in the movable contactor group 72. The limit portion 104 extends along the Y-axis direction and is provided with three avoiding holes 106 for the extension portions 92 of the movable magnetic conductors 90 to extend out to the left along the X-axis direction. The two connecting portions 105 extend rightward along the Y-axis direction from the two ends of the limit portion 104 along the Y-axis direction, respectively. The connecting portion 105 is provided with a mounting hole 107 for cooperating with and being fixed to the connecting end 84. The two proximal guide portions 103 are arranged along the Y-axis direction and extend out of the corresponding connecting portion 105 along the Y-axis direction away from each other. In the embodiment, the proximal guide portion 103 is made of metal and is stamped and formed from the connecting portion 105, so that the proximal guide portion 103 is integrated with the limit body 102 in the embodiment. In other embodiments, the proximal guide portion 103 can also be made of plastic and be integrally formed with the limit body 102 by insert injection molding or be bonded or threadedly connected to the limit body 102. In the embodiment, the proximal guide portion 103 is located in the middle of the connecting portion 105 along the X-axis direction and in the middle of the limit member 76 along the Z-axis direction. In the embodiment, the proximal guide portion 103 is a first guide portion. The first guide portion is provided with a contact portion on both sides along the Z-axis direction, which is capable of contacting the side groove wall of the sliding groove 13 along the Z-axis direction. The contact portion is adjacent to a correction portion along the X-axis direction. The correction portion forms a first projection on a first projection plane perpendicular to the Y-axis direction. The outer edge of the first projection is a convex curve and the radius of curvature thereof is greater than half the size of the first guide portion along the Z-axis direction. In the embodiment, the first guide portion forms a second projection on the first projection plane. The second projection is an ellipse with the long axis extending along the X-axis direction. The two farthest ends of the first guide portion (i.e., the proximal guide portion 103) on the short axis of the ellipse constitute the contact portion. In the embodiment, the first guide portion is in the shape of an elliptic cylinder. In other embodiments, the first guide portion can also be in the shape of an ellipsoid. In the embodiment, the proximal guide portion 103 and the distal guide portion 78 are guide portions 109. The guide portions 109 are of only the first guide portion and the second guide portion. The guide portions 109 are used to extend into the sliding groove 13 along the Y-axis direction and slide along the X-axis direction with the sliding groove 13, so as to guide the movement of the movable contact portion 4 along the X-axis direction.

[0136] Referring to FIG. 1, FIG. 1 shows the micro switch 5 in the embodiment. As shown in FIG. 1, in the embodiment, the micro switch 5 includes the moving spring 83 and two static contact terminals 110. The static contact terminals 110 extend along the Y-axis direction and protrude out of the accommodating member 6. The two static contact terminals 110 are arranged along the Z-axis direction and are located between the moving spring 83 and the coil winding 41 along the X-axis direction. The two static contact terminals 110 are used to be electrically connected with the relay state sensing circuit. The moving spring 83 is fixedly connected with the pusher 70. In the embodiment, the moving spring 83 is integrally formed with the pusher 70 by insert injection molding and is located in the second insert part 81. The moving spring 83 is provided with two contact arms which extend away from each other along the Z-axis direction. The moving spring 83 is driven by the pusher 70 to move along the X-axis direction so as to make the contact arms contact or move away from the two static contact terminals 110. In other embodiments, when the moving spring 83 is not fixedly connected with the pusher 70, the moving spring 83 can also move away from the two static contact terminals 110 based on the elastic restoring force of the moving spring 83 itself.

[0137] Referring to FIG. 23, FIG. 26 and FIG. 27, FIG. 23, FIG. 26 and FIG. 27 show the internal structure of the relay 1 in the embodiment.

[0138] As shown in FIG. 23, in this 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 Z-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 Z-axis direction. The second connecting terminals 36 of the second static contacts 23 are located between the static contact points 20 and the coil winding 41 along the X-axis direction. The eighth overflow portion 34 is located outside the movable contact group 72 along the Z-axis direction, and is also located outside the lower 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 on the two sides of the static flux guide 8 along the Z-axis direction. The projections of all the static contact points 20 on the second projection plane perpendicular to the Z-axis direction for contacting the movable contact group 72 are 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 along the X-axis direction than the first surface S1. The static flux guide 8 is oppositely arranged to the movable flux guide group 73 along the X-axis direction. The static flux guide 8 is located between the third overflow portion 27 and the movable flux guide group 73 along the X-axis direction. 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 on the two sides of the static contact group 7 along the Z-axis direction. The first magnetic driving end 48 is located between the first attraction portion 61 and the fourth attraction portion 64 along the X-axis direction. The second magnetic driving end 49 is located between the third attraction portion 63 and the second attraction portion 62 along the X-axis direction. Each first movable contact point 88 is oppositely arranged to the corresponding first static contact point 25 along the X-axis direction, and each second movable contact point 89 is oppositely arranged to the corresponding second static contact point 33 along the X-axis direction. The limiting member 76 is fixed to the connecting member 71 to be oppositely fixed to the pushing member 70. The limiting member 76 can abut against the movable contact group 72 along the disconnection direction X2. The elastic member 75 can abut against the abutment surface 18 of the accommodating member 6. The first guide portion 103 and the second guide portion 78 are both centrally located between the first movable contact point 88 and the second movable contact point 89 along the Z-axis direction, i.e., the first guide portion 103 and the second guide portion 78 are both centrally located between the movable contact points 87 at the two ends of the movable contact 85 along the Z-axis direction.

[0139] 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 front near guide 103 along the Y-axis direction extends into the left chute 14 of the chute 13 of the cover 11 along the Y-axis direction. The front far guide 78 along the Y-axis direction extends into the right chute 15 of the chute 13 of the cover 11 along the Y-axis direction. The rear near guide 103 along the Y-axis direction extends into the left chute 14 of the chute 13 of the shell 10 along the Y-axis direction. The rear far guide 78 along the Y-axis direction extends into the right chute 15 of the chute 13 of the shell 10 along the Y-axis direction. Thus, each guide 109 extends into the corresponding chute 13 along the Y-axis direction and slides along the X-axis direction with the chute 13. The guides 109 include two precise guides and at least one non-precise guide, the two precise guides are arranged along the Y-axis direction and extend into the corresponding chute 13 along the Y-axis direction away from each other, the cooperation gap between the precise guide and the corresponding chute 13 along the Z-axis direction is smaller than the cooperation gap between the non-precise guide and the corresponding chute 13 along the Z-axis direction. In the embodiment, the two near guides 103 are precise guides, and the cooperation gap between the two near guides 103 as precise guides and the chute 13 along the Z-axis direction is smaller than the cooperation gap between the far guide 78 as non-precise guide and the chute 13 along the Z-axis direction. In the embodiment, the number of non-precise guides is two and specifically can be composed of two far guides 78, and the cooperation gap between the two far guides 78 as non-precise guides and the two right chutes 15 along the Y-axis direction is smaller than the cooperation gap between the two near guides 103 as precise guides and the two left chutes 14 along the Y-axis direction. In the embodiment, the guides 109 are arranged on the movable contact part 4, and the chute 13 is arranged on the accommodating member 6. In other embodiments, the guides 109 can be arranged on the accommodating member 6, and the chute 13 can be arranged on the movable contact part 4. When the guides 109 are arranged on the accommodating member 6, at least one guide 109 is arranged corresponding to the limiting member 76 and is called the near guide 103.

[0140] As shown in FIG. 27, in the embodiment, the two guides 109 arranged along the Y-axis direction form a guide group, and there are two guide groups in the embodiment, and the guide group formed by the two far guides 78 is shown in the figure. The two guides 109 in the guide group extend away from each other along the Y-axis direction, and the two ends of the two guides in the guide group along the Y-axis direction respectively slide along the Y-axis direction with the two protrusions 13a. The two protrusions 13a limit the guide group and the movable contact part 4 along the Y-axis direction. In the embodiment, the Z-axis direction is the direction of gravity, and thus the lower side of the chute 13 supports the corresponding guide 109 upward.

[0141] Referring to Fig. 23, Fig. 23 shows the state of the relay 1 when the armature assembly 38 is in the first position. As shown in Fig. 23, when the armature assembly 38 is in the first position, the movable contact group 72 is disconnected from the stationary contact group 7 in the disconnecting direction X2, the relay 1 is in the off state, and the external circuit is disconnected. At this time, the elastic member 75 is in contact with the abutment surface 18 in the disconnecting direction X2, and the elastic member 75 is deformed to store energy. The limiting member 76 abuts against the movable contact group 72 in the disconnecting direction X2, each movable contact 85 is pressed against the elastic support group 74, and the frame body 94 of the elastic support 93 and the main body 98 of the elastic member 75 are fixed relative to the push member 70 in the X-axis direction, so that the frame body 94 and the elastic member 75 are fixed relative to the push member 70. The movable spring 83 abuts against the two stationary contact terminals 110, and the relay state sensing circuit senses that the relay 1 is in the off state.

[0142] When the coil assembly 37 drives the armature assembly 38 to move in the closing direction X1 upon receiving the first pulse electrical signal, the armature assembly 38 drives the movable contact portion 4 to move in the closing direction X1, and in this process, each guide portion 109 slides in the sliding groove 13 in the closing direction X1 and guides the movable contact portion 4. The elastic member 75 recovers from the deformation to release the stored energy. When the movable contact 87 contacts the corresponding stationary contact 20, the push member 70 enters the overstroke, at which time the elastic support group 74 is deformed to store energy until the armature assembly 38 reaches the second position, and the movable contact group 72 is connected to the stationary contact group 7.

[0143] Referring to Figs. 24 and 26, Figs. 24 and 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 connected to the stationary contact group 7 in the closing direction X1, the relay 1 is in the on state, and the external circuit is connected. 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 downward in the Z-axis direction, and when the cross flow portion is located below the overcurrent bridge 86, the overcurrent direction is the disconnecting direction X2. 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 toward the stationary contact group 7. The elastic support group 74 is deformed to store energy in the X-axis direction. The elastic member 75 is away from the abutment surface 18 in 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.

[0144] As shown in Fig. 26, the current passing through the overcurrent bridge 86 forms an anti-short-circuit magnetic circuit Ml between the moving magnetic conductor 90 and the static magnetic conductor 8. In this embodiment, the number of the anti-short-circuit magnetic circuit Ml is two. Meanwhile, the current passing through the anti-flow part formed by the third overcurrent part 27 forms an anti-flow magnetic field M2, the magnetic induction lines of which on the side of the static magnetic conductor 8 are in the same direction as the magnetic induction lines formed by the anti-short-circuit magnetic circuit Ml on the side of the static magnetic conductor 8.

[0145] 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 electric signal, the armature assembly 38 drives the moving contact part 4 to move in the opening direction X2, in the process, each guide part 109 slides in the sliding groove 13 in the opening direction X2 and guides the moving contact part 4. The elastic support assembly 74 releases the deformation energy. The elastic member 75 deforms after abutting against the abutting surface 18. Until it returns to the state shown in Fig. 23, in which the armature assembly 38 is in the first position.

[0146] The ammeter in this embodiment includes the relay 1 in this embodiment.

[0147] Embodiment Two

[0148] Referring to Fig. 28, Fig. 28 shows the relay 1 in embodiment two. As shown in Fig. 28, the only difference between this embodiment and embodiment one is that the shape of the near guide part 103 is different. In this embodiment, the near guide part 103 is still the first guide part, and the abutting part of the first guide part in this embodiment is a plane perpendicular to the Z-axis direction.

[0149] Embodiment Three

[0150] Referring to Fig. 29, Fig. 29 shows the relay 1 in embodiment three. As shown in Fig. 29, the only difference between this embodiment and embodiment one is that the shapes of the near guide part 103 and the far guide part 78 are different. In this embodiment, the near guide part 103 and the far guide part 78 are both first guide parts, and the abutting parts of the near guide part 103 and the far guide part 78 as the first guide parts are planes perpendicular to the Z-axis direction.

[0151] Embodiment Four

[0152] Referring to FIG. 30, FIG. 30 shows the relay 1 in the fourth embodiment. As shown in FIG. 30, the only difference between the present embodiment and the first embodiment is that the number and arrangement of the proximal guide portions 103 are different, and the slide grooves 13 are also adapted accordingly. In the present embodiment, the number of the proximal guide portions 103 is four, of which two are located at the front of the limiting body 102 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the limiting body 102 along the Y-axis direction and extend backward along the Y-axis direction. The two proximal guide portions 103 located at the front are arranged along the Z-axis direction, the two proximal guide portions 103 located at the rear are arranged along the Z-axis direction, the two proximal guide portions 103 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two proximal guide portions 103 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in the present embodiment, both the shell 10 and the cover 11 are provided with two left slide grooves 14 arranged along the Z-axis direction.

[0153] Fifth Embodiment

[0154] Referring to FIG. 31, FIG. 31 shows the relay 1 in the fifth embodiment. As shown in FIG. 31, the only difference between the present embodiment and the first embodiment is that the shape of the proximal guide portions 103 is different, the shape, number and arrangement of the distal guide portions 78 are different, and the slide grooves 13 are also adapted accordingly. In the present embodiment, the proximal guide portions 103 are no longer the first guide portions, but the second guide portions, and the third projection thereof on the first projection plane perpendicular to the Y-axis direction is circular. In the present embodiment, the distal guide portions 78 are no longer the second guide portions, but the first guide portions, and the second projection thereof on the first projection plane perpendicular to the Y-axis direction is elliptical. In the present embodiment, the number of the distal guide portions 78 is four, of which two are located at the front of the pushing body 77 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the pushing body 77 along the Y-axis direction and extend backward along the Y-axis direction. The two distal guide portions 78 located at the front are arranged along the Z-axis direction, the two distal guide portions 78 located at the rear are arranged along the Z-axis direction, the two distal guide portions 78 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two distal guide portions 78 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in the present embodiment, both the shell 10 and the cover 11 are provided with two right slide grooves 15 arranged along the Z-axis direction.

[0155] Sixth Embodiment

[0156] Referring to FIG. 32, FIG. 32 shows the relay 1 in the sixth embodiment. As shown in FIG. 32, the only difference between the present embodiment and the first embodiment is that the shapes of the proximal guide portions 103 and the distal guide portions 78 are different. In the present embodiment, the proximal guide portions 103 are the second guide portions, and the third projection thereof on the first projection plane perpendicular to the Y-axis direction is circular. In the present embodiment, the distal guide portions 78 are the first guide portions and are the precisely-fitted guide portions, and the second projection thereof on the first projection plane perpendicular to the Y-axis direction is elliptical.

[0157] Embodiment Seven

[0158] Referring to FIG. 33, FIG. 33 shows the relay 1 in Embodiment Seven. As shown in FIG. 33, the difference between this embodiment and Embodiment One is that the far guiding portion 78 is no longer provided in this embodiment.

[0159] Embodiment Eight

[0160] Referring to FIG. 34, FIG. 34 shows the relay 1 in Embodiment Eight. As shown in FIG. 34, the difference between this embodiment and Embodiment Six is that the near guiding portion 103 is no longer provided in this embodiment.

[0161] Embodiment Nine

[0162] Referring to FIG. 35, FIG. 35 shows the relay 1 in Embodiment Nine. As shown in FIG. 35, the difference between this embodiment and Embodiment Eight is that the number and arrangement of the far guiding portions 78 are different, and the slide groove 13 also needs to be adapted accordingly. In this embodiment, the number of the far guiding portions 78 is four, of which two are located at the front of the pushing body 77 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the pushing body 77 along the Y-axis direction and extend backward along the Y-axis direction. The two far guiding portions 78 located at the front are arranged along the Z-axis direction, the two far guiding portions 78 located at the rear are arranged along the Z-axis direction, and the two far guiding portions 78 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two far guiding portions 78 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in this embodiment, both the shell 10 and the cover 11 are provided with two right slide grooves 15 arranged along the Z-axis direction.

[0163] Embodiment Ten

[0164] Referring to FIG. 36, FIG. 36 shows the relay 1 in Embodiment Ten. As shown in FIG. 36, the difference between this embodiment and Embodiment Seven is that the number and arrangement of the near guiding portions 103 are different, and the slide groove 13 also needs to be adapted accordingly. In this embodiment, the number of the near guiding portions 103 is four, of which two are located at the front of the limiting body 102 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the limiting body 102 along the Y-axis direction and extend backward along the Y-axis direction. The two near guiding portions 103 located at the front are arranged along the Z-axis direction, the two near guiding portions 103 located at the rear are arranged along the Z-axis direction, and the two near guiding portions 103 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two near guiding portions 103 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in this embodiment, both the shell 10 and the cover 11 are provided with two left slide grooves 14 arranged along the Z-axis direction.

[0165] Embodiment Eleven

[0166] Referring to FIG. 37, FIG. 37 shows the relay 1 in Embodiment Eleven. As shown in FIG. 37, the difference between this embodiment and Embodiment One is that the number and arrangement of the far guide portions 78 are different, and the slide grooves 13 also need to be adapted accordingly. In this embodiment, the number of the far guide portions 78 is four, of which two are located at the front of the pushing body 77 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the pushing body 77 along the Y-axis direction and extend backward along the Y-axis direction. The two far guide portions 78 located at the front are arranged along the Z-axis direction, the two far guide portions 78 located at the rear are arranged along the Z-axis direction, and the two far guide portions 78 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two far guide portions 78 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in this embodiment, both the shell 10 and the cover 11 are provided with two right slide grooves 15 arranged along the Z-axis direction.

[0167] Embodiment Twelve

[0168] Referring to FIG. 38, FIG. 38 shows the relay 1 in Embodiment Twelve. As shown in FIG. 38, the difference between this embodiment and Embodiment Six is that the number and arrangement of the near guide portions 103 are different, and the slide grooves 13 also need to be adapted accordingly. In this embodiment, the number of the near guide portions 103 is four, of which two are located at the front of the limiting body 102 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the limiting body 102 along the Y-axis direction and extend backward along the Y-axis direction. The two near guide portions 103 located at the front are arranged along the Z-axis direction, the two near guide portions 103 located at the rear are arranged along the Z-axis direction, and the two near guide portions 103 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two near guide portions 103 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in this embodiment, both the shell 10 and the cover 11 are provided with two left slide grooves 14 arranged along the Z-axis direction. In this embodiment, the far guide portions 78 are precision fit guide portions.

[0169] Embodiment Thirteen

[0170] Referring to FIG. 39, FIG. 39 shows the relay 1 in Embodiment Thirteen. As shown in FIG. 39, the difference between this embodiment and Embodiment Eleven is that the number and arrangement of the proximal guide portions 103 are different, and the slide slot 13 also needs to be adapted accordingly. In this embodiment, the number of the proximal guide portions 103 is four, of which two are located at the front of the limiting body 102 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the limiting body 102 along the Y-axis direction and extend backward along the Y-axis direction. The two proximal guide portions 103 located at the front are arranged along the Z-axis direction, the two proximal guide portions 103 located at the rear are arranged along the Z-axis direction, and the two proximal guide portions 103 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two proximal guide portions 103 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in this embodiment, both the shell 10 and the cover 11 are provided with two left slide slots 14 arranged along the Z-axis direction.

[0171] Embodiment Fourteen

[0172] Referring to FIG. 40, FIG. 40 shows the relay 1 in Embodiment Fourteen. As shown in FIG. 40, the difference between this embodiment and Embodiment Twelve is that the number and arrangement of the distal guide portions 78 are different, and the slide slot 13 also needs to be adapted accordingly. In this embodiment, the number of the distal guide portions 78 is four, of which two are located at the front of the pushing body 77 along the Y-axis direction and extend forward along the Y-axis direction, and the other two are located at the rear of the pushing body 77 along the Y-axis direction and extend backward along the Y-axis direction. The two distal guide portions 78 located at the front are arranged along the Z-axis direction, the two distal guide portions 78 located at the rear are arranged along the Z-axis direction, and the two distal guide portions 78 located at the upper part along the Z-axis direction are arranged along the Y-axis direction, and the two distal guide portions 78 located at the lower part along the Z-axis direction are arranged along the Y-axis direction. Accordingly, in this embodiment, both the shell 10 and the cover 11 are provided with two right slide slots 15 arranged along the Z-axis direction.

[0173] In each embodiment, the guide portion 109 extends into the slide slot 13 along the Y-axis direction and is in sliding cooperation with the slide slot 13 along the X-axis direction. Since the direction in which the guide portion 109 extends into the slide slot 13 is perpendicular to the movement direction of the movable contact part 4, the part of the guide portion 109 used for sliding cooperation is much shorter than that of the prior art, and it is not easy to be flexed and deformed, and its guiding effect is better than that of the prior art.

[0174] In each embodiment, since the guide portion 109 extends into the slide slot 13 along the Y-axis direction, the size of the cooperation surface of the guide portion 109 and the slide slot 13 can be set smaller than that of the prior art, which can reduce the friction between the slide slot 13 and the guide portion 109, and make the required driving force of the magnetic circuit part 3 smaller, thereby reducing the volume of the magnetic circuit part 3, which is conducive to the miniaturization of the relay 1.

[0175] In the embodiments, the outer edge of the first projection of the deviation rectifying portion of the first guiding portion on the first projection plane is a convex curve, so even if the first guiding portion slightly deviates in the plane perpendicular to the Y-axis direction, the sliding fit between the first guiding portion and the sliding groove 13 is not prone to jamming, which is conducive to avoiding the need to increase the pushing force of the magnetic circuit portion 3 due to jamming, and is conducive to reducing the useless work of the magnetic circuit portion 3, so as to reduce the power consumption of the coil assembly 37.

[0176] In the embodiments, the outer edge of the first projection of the first guiding portion forms a convex curve with a radius of curvature greater than half the size of the guiding portion 109 along the Z-axis direction, which not only helps to avoid jamming of the sliding fit between the first guiding portion and the sliding groove 13, but also has a better guiding effect on the movement of the moving contact portion 4 along the X-axis direction compared to the comparative technical solution in which the radius of curvature is less than or equal to half the size of the guiding portion 109 along the Z-axis direction, which helps the moving contact 87 to correctly close with the stationary contact 20 along the X-axis direction, thereby reducing the contact resistance between the moving contact 87 and the stationary contact 20, shortening the length of time for which the moving contact 87 draws an arc when breaking away from the stationary contact 20, and increasing the service life of the moving contact 87, the stationary contact 20, and the entire relay 1.

[0177] In the embodiments, the two moving contacts 87 are arranged along the Z-axis direction, and the guiding portion 109 extends into the sliding groove 13 along the Y-axis direction, so the arrangement direction of the two moving contacts 87 is perpendicular to the direction in which the guiding portion 109 extends into the sliding groove 13, which more reasonably utilizes the space in the three directions of the relay 1, and can reduce the size of the relay 1 along the Z-axis direction.

[0178] In the embodiments other than Embodiment Two and Embodiment Three, the second projection is an ellipse with the long axis extending along the X-axis direction, so the abutting portion of the first guiding portion is a point or a line segment extending along the Y-axis direction, the contact area between the abutting portion and the side groove wall of the sliding groove 13 is smaller, and the friction between the first guiding portion and the sliding groove 13 is smaller, so the required driving force of the magnetic circuit portion 3 is smaller, thereby enabling the volume of the magnetic circuit portion 3 to be reduced, which is conducive to realizing the miniaturization of the relay.

[0179] In some embodiments, when the first guiding portion is in the shape of an ellipsoid, the abutting portion of the first guiding portion is a point, and compared to the technical solution in which the first guiding portion is in the shape of an elliptical cylinder, the contact area between the abutting portion and the side groove wall of the sliding groove 13 is smaller, and the friction between the first guiding portion and the sliding groove 13 is smaller, so the required driving force of the magnetic circuit portion 3 is smaller, thereby enabling the volume of the magnetic circuit portion 3 to be reduced, which is conducive to realizing the miniaturization of the relay.

[0180] In other embodiments except for Embodiment Two and Embodiment Three, when the first guide portion is in the shape of an elliptic cylinder, the abutting portion of the first guide portion is a line segment extending along the Y-axis direction. Compared with the technical solution in which the first guide portion is in the shape of an ellipsoid, the movable contact portion is less likely to deflect in the plane perpendicular to the X-axis direction, thereby being able to better guide the movement of the movable contact portion 4 along the X-axis direction, facilitating the movable contact 87 to correctly close with the stationary contact 20 along the X-axis direction, thereby reducing the contact resistance between the movable contact 87 and the stationary contact 20, shortening the length of time for which the movable contact 87 pulls an arc when breaking away from the stationary contact 20, and increasing the service life of the movable contact 87, the stationary contact 20, and the entire relay 1.

[0181] In Embodiment Two and Embodiment Three, the abutting portion is a plane perpendicular to the Z-axis direction. This plane necessarily has a size in the X-axis direction and the Y-axis direction. Therefore, compared with the second to fourth technical solutions, the movable contact portion 4 is less likely to deflect in the plane perpendicular to the Y-axis direction and the plane perpendicular to the X-axis direction, thereby being able to better guide the movement of the movable contact portion 4 along the X-axis direction, facilitating the movable contact 87 to correctly close with the stationary contact 20 along the X-axis direction, thereby reducing the contact resistance between the movable contact 87 and the stationary contact 20, shortening the length of time for which the movable contact 87 pulls an arc when breaking away from the stationary contact 20, and increasing the service life of the movable contact 87, the stationary contact 20, and the entire relay 1.

[0182] In other embodiments except for Embodiment Seven to Embodiment Ten, the guide portion 109 has only the second guide portion in addition to the first guide portion. The third projection of the second guide portion is circular. On the premise that the first guide portion has already improved the guiding effect, the second guide portion is beneficial to cooperating with the first guide portion to avoid the sliding cooperation between the guide portion 109 and the sliding groove 13 from being jammed, thereby reducing the power consumption of the coil assembly 37. Meanwhile, compared with the guide portion 109 having a third projection that is not circular in addition to the first guide portion, all the guide portions 109 are more likely to extend into the corresponding sliding groove along the Z-axis direction. Therefore, the movable contact portion 4 is more likely to establish a sliding cooperation relationship with the accommodating member 6 along the X-axis direction.

[0183] In each embodiment, the groove bottom of the first sliding groove is provided with a protrusion 13a that protrudes from the groove bottom along the Y-axis direction and extends along the X-axis direction. Therefore, the top end of the guide portion 109 along the Y-axis direction can be in sliding cooperation with the protrusion 13a. Compared with the top end of the guide portion 109 along the Y-axis direction being directly in sliding cooperation with the groove bottom, the sliding cooperation area is smaller, the friction between the sliding groove 13 and the guide portion 109 can be reduced, and the driving force required by the magnetic circuit portion 3 is smaller, thereby being able to reduce the volume of the magnetic circuit portion 3 and facilitate the miniaturization of the relay 1.

[0184] In each embodiment, the first sliding groove is provided with a recess 13b between the protrusion 13a and the side groove wall on both sides. The protrusion 13a of the first sliding groove abuts against the top end of the guide portion 109 along the Y-axis direction, and the debris generated by friction between the two will fall into the recess 13b on both sides, without affecting the sliding fit between the guide portion 109 and the protrusion 13a, avoiding the jamming or increased friction caused by the debris remaining on the sliding fit surface.

[0185] In each embodiment, the openings of at least two first sliding grooves face or are away from each other along the Y-axis direction, and the protrusions 13a of the two first sliding grooves abut against the top end of the corresponding guide portion 109 along the Y-axis direction, facing or away from each other along the Y-axis direction, which is conducive to making the fitting gap between the guide portion 109 and the first sliding groove along the Y-axis direction smaller, and the moving contact part 4 is less likely to be deflected in the plane perpendicular to the Z-axis direction when moving along the X-axis direction, and the guiding effect is better, which is conducive to the correct closure of the moving contact point 87 and the static contact point 20 along the X-axis direction, thereby reducing the contact resistance between the moving contact point 87 and the static contact point 20, shortening the length of the arc drawn when the moving contact point 87 is disconnected from the static contact point 20, and increasing the service life of the moving contact point 87 and the static contact point 20 and the entire relay 1.

[0186] In each embodiment, the two first sliding grooves with openings facing or away from each other are arranged along the Y-axis direction, which is conducive to avoiding the deflection of the guide portion 109 in the plane perpendicular to the Z-axis direction, and thus the guiding effect is better, which is conducive to the correct closure of the moving contact point 87 and the static contact point 20 along the X-axis direction, thereby reducing the contact resistance between the moving contact point 87 and the static contact point 20, shortening the length of the arc drawn when the moving contact point 87 is disconnected from the static contact point 20, and increasing the service life of the moving contact point 87 and the static contact point 20 and the entire relay 1.

[0187] In other embodiments except for Embodiment Eight and Embodiment Nine, the near guide portion 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 member 7 is fixedly connected to the accommodating member 6, arranging the sliding groove 13 on the accommodating member 6 is conducive 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 contact points 19, so that the sliding groove 13 guides the guide portion 109 along the X-axis direction more accurately.

[0188] In other embodiments except for Embodiment Eight and Embodiment Nine, since the limiting member 76 abuts against the moving contact member 85 before the pushing member 70 moves into the overstroke along the closing direction X1, and when the moving contact member 85 enters the overstroke, the moving contact point 87 has already abutted against the corresponding static contact point 20, arranging the near guide portion 103 on the limiting member 76 can better guide the moving contact member 85 to move along the X-axis direction, so that the moving contact point 87 correctly closes the static contact point 20 along the X-axis direction, reduces the contact resistance between the moving contact point 87 and the static contact point 20, and also shortens the length of the arc drawn when the moving contact point 87 is disconnected from the static contact point 20, which is conducive to increasing the service life of the moving contact point 87 and the static contact point 20.

[0189] In the first to fourth embodiments, the seventh embodiment, the tenth embodiment, the eleventh embodiment and the thirteenth embodiment, the proximal guide 103 is the first guide, which can better guide the movement of the movable contact part 4 along the X-axis direction and make the movable contact point 87 more easily and correctly close to the stationary contact point 20 along the X-axis direction.

[0190] In the fourth embodiment, the tenth embodiment and the twelfth to fourteenth embodiments, the at least two proximal guides 103 are arranged along the Z-axis direction, which makes the movable contact part 4 less likely to deflect in the plane perpendicular to the Y-axis direction, and thus can better guide the movement of the movable contact part 4 along the X-axis direction.

[0191] In each of the embodiments, the two proximal guides 103 are arranged along the Y-axis direction and extend into the corresponding chute 13 along the Y-axis direction away from each other, so that the two chutes 13 can support the two proximal guides 103 along the Z-axis direction in the case that the Z-axis direction is the direction of gravity, thereby being able to support the limiting member 76. In this case, it is more conducive to preventing the movable contact part 4 from deflecting in the plane perpendicular to the X-axis direction, and thus can better guide the movement of the movable contact part 4 along the X-axis direction.

[0192] In the first to third embodiments, the fifth to seventh embodiments and the eleventh embodiment, the number of the proximal guides 103 is two, and the two proximal guides 103 are centrally arranged along the Z-axis direction between the movable contact points 87 at the two ends of the movable contact 85. Therefore, the proximal guides 103 are centrally arranged along the Z-axis direction, which can save the space of the relay 1 along the Z-axis direction and avoid increasing the size of the relay 1 along the Z-axis direction. At the same time, it is less likely to cause the movement of the proximal guides 103 along the X-axis direction to be stuck due to the two chutes 13 arranged along the Z-axis direction being not parallel to each other, and the magnetic driving force of the magnetic circuit part 3 is not easily wasted on useless work, thereby being able to reduce the energy consumption of the coil assembly 37.

[0193] In the first to fourth embodiments, the seventh embodiment, the tenth embodiment, the eleventh embodiment and the thirteenth embodiment, the proximal guide 103 extends from the connecting part 105 along the Y-axis direction, and when the proximal guide 103 is the first guide, it is more conducive to be technically implemented.

[0194] In each of the embodiments except for the eighth and ninth embodiments, the proximal guide 103 is stamped and formed, which has fewer manufacturing steps, is simpler to manufacture, has lower cost and is easier to ensure the size and position of the outer edge of the proximal guide 103, and is conducive to better guiding the movement of the movable contact part 4 along the X-axis direction.

[0195] In some embodiments, the material of the proximal guide 103 and the accommodating member 6 is plastic, which is conducive to preventing the swarf from falling on the movable contact point 87 and the stationary contact point 20 and affecting the contact resistance between the movable contact point 87 and the stationary contact point 20.

[0196] In each embodiment, the material of the limiting body 102 is metal, so it is more rigid and has a better limiting effect on the moving contact group 72.

[0197] In some embodiments, the near guide part 103 and the limiting body 102 are integrally formed by insert injection molding or bonded or threaded connection, and the combination of the two is better, the position of the near guide part 103 along the Z-axis direction is more accurate, and it is beneficial to better slide along the X-axis direction with the sliding groove 13.

[0198] In embodiments other than embodiment seven and embodiment ten, the pushing piece 70 is provided with a far guide part 78, the limiting piece 76 is provided with a near guide part 103, and the limiting piece 76 is fixedly connected with the pushing piece 70, so the far guide part 78 and the near guide part 103 cooperate with each other, which is beneficial to avoid the deflection of the whole formed by the pushing piece 70 and the limiting piece 76 fixedly connected with each other in the plane perpendicular to the Y-axis direction, and is beneficial to better guide the movement of the moving contact part 4 along the X-axis direction. Therefore, it is beneficial to ensure that the moving contact point 87 correctly closes with the stationary contact point 20 along the X-axis direction.

[0199] In embodiment three, embodiment five, embodiment six, embodiment eight, embodiment nine, embodiment twelve, and embodiment fourteen, the far guide part 78 is a first guide part, which is not only beneficial to avoid jamming of the moving contact part 4 when moving along the X-axis direction, but also can better guide the movement of the moving contact part 4 along the X-axis direction, especially the movement of the moving contact part 4 along the opening direction X2.

[0200] In embodiments other than embodiments seven to ten, at least one near guide part 103 and one far guide part 78 extend into the corresponding sliding groove 13 along the Y-axis direction away from each other, so that in the case that the Z-axis direction is the direction of gravity, the two sliding grooves 13 can support at least one near guide part 103 and at least one far guide part 78 along the Z-axis direction, thereby being able to support the moving contact part 4. And in this case, it is more beneficial to prevent the moving contact part 4 from deflecting in the plane perpendicular to the X-axis, so it can better guide the movement of the moving contact part 4 along the X-axis direction.

[0201] In embodiment five, embodiment nine, embodiment eleven, embodiment thirteen, and embodiment fourteen, at least two far guide parts 78 are arranged along the Z-axis direction, so that the moving contact part 4 is less likely to deflect in the plane perpendicular to the Y-axis direction, and thus it can better guide the movement of the moving contact part 4 along the X-axis direction.

[0202] In other embodiments except for Embodiment Seven and Embodiment Ten, at least two distal guide portions 78 are arranged along the Y-axis direction and extend into the corresponding chute 13 away from each other along the Y-axis direction, so that the two chutes 13 can support the two distal guide portions 78 along the Z-axis direction in the case that the Z-axis direction is the direction of gravity, thereby being able to support the pusher 70 and the movable contact part 4. In this case, it is more conducive to preventing the movable contact part 4 from deflecting in the plane perpendicular to the X-axis, thereby being able to better guide the movement of the movable contact part 4 along the X-axis direction.

[0203] In Embodiments One to Four, Embodiment Six, Embodiment Eight and Embodiment Twelve, the number of distal guide portions 78 is two, and the two distal guide portions 78 are centrally located between the two movable contact points 87 along the Z-axis direction. Therefore, the distal guide portions 78 are centrally located along the Z-axis direction, which can save the space of the relay 1 along the Z-axis direction and avoid the increase in the size of the relay 1 along the Z-axis direction. At the same time, it is less likely to cause the movement of the distal guide portions 78 along the X-axis direction to be stuck due to the two chutes 13 arranged along the Z-axis direction being not parallel to each other, so that the magnetic driving force of the magnetic circuit part 3 is not easily wasted on useless work, thereby being able to reduce the energy consumption of the coil assembly 37.

[0204] In Embodiment One, Embodiment Six and Embodiment Twelve, the fitting gap formed between the precisely fitting guide portion and the chute 13 along the Z-axis direction is smaller than the fitting gap formed between the non-precisely fitting guide portion and the chute 13 along the Z-axis direction, which is conducive to reducing the difficulty of establishing a sliding fit between all guide portions 109 and the chute 13, reducing the manufacturing precision requirement of the movable contact part 4 and the fixed part 2, and at the same time, it is also conducive to correctly guiding the movement of the movable contact part 4 along the X-axis direction.

[0205] In Embodiment One, Embodiment Six and Embodiment Twelve, the precisely fitting guide portion is the first guide portion. Therefore, as long as the precisely fitting guide portion has a little deflection in the plane perpendicular to the Y-axis, the side groove wall of the chute 13 can be corrected in position by the correction portion acting on the precisely fitting portion due to the precisely fitting portion being the first guide portion, thereby being able to better play the unique guiding and anti-sticking effects of the first guide portion.

[0206] In Embodiment One, the precisely fitting guide portion is the proximal guide portion, so the precisely fitting guide portion is closer to the movable contact 85 along the X-axis direction, which is more conducive to the correct closing of the movable contact point 87 and the static contact point 20 along the X-axis direction, thereby reducing the contact resistance between the movable contact point 87 and the static contact point 20, shortening the length of time for the movable contact point 87 to draw an arc when breaking away from the static contact point 20, and increasing the service life of the movable contact point 87, the static contact point 20 and the entire relay.

[0207] In the embodiment one, the precisely-fitted guide part is arranged as the middle part of the near guide part 103 and the first guide part along the Z-axis direction, which can save the space of the relay 1 along the Z-axis direction and avoid the increase of the size of the relay 1 along the Z-axis direction. Meanwhile, the movement of the near guide part 103 along the X-axis direction is less likely to be jammed due to the non-parallel arrangement of the two sliding grooves 13 along the Z-axis direction, and the magnetic driving force of the magnetic circuit part 3 is less likely to be wasted on useless work, thereby reducing the energy consumption of the coil assembly 37.

[0208] In other embodiments except the embodiments seven to ten, the fitting gap between the two non-precisely-fitted guide parts arranged along the Y-axis direction and the corresponding sliding grooves 13 along the Y-axis direction is smaller than the fitting gap between the two precisely-fitted guide parts and the corresponding sliding grooves 13 along the Y-axis direction, which is more conducive to improving the fitting precision of the movable contact part 4 and the accommodating member 6 along the Y-axis direction. Meanwhile, when the movable contact part 4 is assembled to the accommodating member 6 along the Y-axis direction to establish the sliding fitting relationship between the guide parts 109 and the sliding grooves 13, the non-precisely-fitted guide parts can be inserted into the sliding grooves 13 along the Y-axis direction for pre-guiding before the precisely-fitted guide parts are inserted into the sliding grooves along the Y-axis direction, which makes the assembly easier.

[0209] In each embodiment, the static contact points 20 of the two static contacts 19 are arranged along the Z-axis direction, and the movable contact group 72 is closed or disconnected with the static contact group 7 along the X-axis direction to correspondingly turn on or turn off the electrical connection between the two static contacts 19. Under this structure, the safety distance between the movable contact group 72 and the static contact group 7 is twice the actual distance between the movable contact points 87 and the corresponding static contact points 20 along the X-axis direction, so the relay 1 has higher safety and stronger load capacity, which is more conducive to improving the safety distance between the movable contact group 72 and the static contact group 7.

[0210] In each embodiment, the static contact points 20 of the two static contacts 19 are arranged along the Z-axis direction, and the connection 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 Z-axis direction, which shortens the size along the X-axis direction compared to the protrusion of the static contacts 19 out of the accommodating member 6 along the movement direction of the movable contact group 72, and effectively utilizes the space along the Z-axis direction. Therefore, the size of the relay 1 along the X-axis direction and the size along the Z-axis direction are well balanced, which creates more favorable conditions for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0211] In each embodiment, the two armatures 51 fixed with the permanent magnet 50 are changed from parallel arrangement to cross arrangement in the armature assembly 38 based on the coil assembly 37 of the swing type magnetic latching relay, 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 of the relay 1 can be higher, and more favorable conditions can be created for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0212] In each embodiment, since the axis of the coil winding 41 extends along the Z-axis direction and the two magnetic driving ends 45 are arranged along the Z-axis direction, and the linear motion direction of the armature assembly 38 is the X-axis direction perpendicular to the Z-axis direction, this layout is conducive to giving space for the motion of the armature assembly 38 and the movable contact group 72 along the X-axis, and at this time, the size of the accommodating member 6 along the Z-axis direction is mainly determined by the length of the coil assembly 37 along the Z-axis direction, so the relay 1 does not need to be very long in one direction (whether the X-axis direction or the Z-axis direction), and the relay 1 can be more easily adapted to limited space, and more favorable conditions can be created for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0213] In each embodiment, the push rod and the moving iron core do not need to be placed in the coil winding 41, so the support shaft diameter of the coil holder 40 is smaller, and the inner diameter of the coil winding 41 is smaller. Compared with the direct-acting 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 greater, which 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.

[0214] In each 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 that penetrates through the entire coil assembly 37. In the magnetic latching state, the attracting portion 60 attracts the corresponding magnetic driving end 45 along the X-axis direction, so that the first part and the second part can form a complete magnetic circuit without air gap, so the magnetic loss is smaller, the magnetic efficiency is higher, and the movement stroke of the movable contact group 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, and the size of the coil assembly 37 can be made smaller. Therefore, more favorable conditions can be created for increasing the safety distance between the movable contact group 72 and the static contact group 7 in a limited space.

[0215] In each embodiment, since the second part of the magnetic circuit passes through the entire coil assembly 37, the magnetic force during magnetic retention is larger than that of the direct-acting magnetic latching relay in the prior art, especially when the relay 1 is subjected to a fault current impact, the armature assembly 38 is less likely to move out of the magnetic retention state, which is beneficial to avoid the destructive arc caused by the separation of the moving contact set 72 from the static contact set 7 due to the fault current.

[0216] In each embodiment, when the coil assembly 37 is excited by a pulse electrical signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed, not only the two magnetic driving ends 45 generate magnetic repulsion on the first and third attraction sections 61 and 63, but also the first part of the push magnetic circuit without air gap is formed between the fourth and second attraction sections 64 and 62 through the armature assembly 38, and the second part of the push magnetic circuit is formed through the coil assembly 37, and the first and second parts of the push magnetic circuit constitute a complete push magnetic circuit, which has only a certain travel air gap and no other air gap, so the magnetic efficiency is higher, and the magnetic driving force of the two magnetic driving ends 45 on the armature assembly 38 is stronger under the same power consumption, which is more conducive to increasing the safety distance between the moving contact set 72 and the static contact set 7. Similarly, when the coil assembly 37 is excited by a pulse electrical signal to reverse the polarity of the two magnetic driving ends 45 temporarily formed, the armature assembly 38 in the second position has the same technical effect.

[0217] In each embodiment, since the first and fourth attraction sections 61 and 64 are arranged along the X-axis direction, the third and second attraction sections 63 and 62 are arranged along the X-axis direction, the first and third attraction sections 61 and 63 are arranged along the Z-axis direction, and the fourth and second attraction sections 64 and 62 are arranged along the Z-axis direction, the four attraction sections 60 of the armature assembly 38 are respectively located at the four vertex positions of the rectangle in the first projection plane, which is conducive to adjusting the size of the armature assembly 38 along the X-axis and Z-axis directions, and creates more favorable conditions for increasing the safety distance between the moving contact set 72 and the static contact set 7 in a limited space.

[0218] In the embodiments, the permanent magnets 50 are arranged on both sides of the portion 59 intersecting with each other along the Z-axis, and the two magnetic poles 54 of the permanent magnets 50 are arranged along the X-axis direction. Without increasing the size of the armature assembly 38 along the X-axis direction and the Z-axis direction, the space occupied by the armature assembly 38 is fully utilized to increase the magnetic interaction force between the magnetic driving end 45 and the armature assembly 38, which is more conducive to increasing the safety distance between the moving contact group 72 and the static contact group 7. Since each permanent magnet 50 is connected together through two armatures 51, the difference in the strength of the magnetic field of each permanent magnet 50 is effectively weakened on the two armatures 51, and the magnetic propulsion force between the two attracting portions 60 on the two sides and the magnetic driving end 45 can be more balanced along the X-axis direction, so that the relay 1 is less likely to jam and has a longer service life.

[0219] In the embodiments, the projection of the armature assembly 38 on the first projection plane is mirror-symmetrical along the symmetry plane perpendicular to the Z-axis, so that the consistency of the magnetic field strength on both sides of the armature assembly 38 along the Z-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 moving contact group 72 and the static contact group 7 in a limited space.

[0220] In the embodiments, the two moving contact points 87 of the moving contact 85 are arranged along the Z-axis direction and fixed to the overcurrent bridge 86 extending along the Z-axis direction, so that the current passing through the overcurrent bridge 86 can flow along the Z-axis direction, facilitating the formation of a magnetic loop for short-circuit resistance. The short-circuit resistance magnetic loop is used to enable the moving contact group 72 to be more reliably closed with the static contact group 7, which is conducive to avoiding the disengagement of the moving contact group 72 from the static contact group 7 when the relay 1 is subjected to a fault current, thereby avoiding destructive arc drawing to cause damage to the relay 1.

[0221] In the embodiments, the number of moving contacts 85 in the moving contact group 72 is two or more, and each moving contact 85 is arranged along the Y-axis direction. Therefore, when the moving contact group 72 is closed with the static contact group 7, each moving contact 85 is connected in parallel with each other, which can increase the load capacity of the relay 1 and also reduce the contact resistance between the moving contact point 87 and the static contact point 20. At the same time, in combination with the technical means that the overcurrent bridge 86 extends along the Z-axis direction and the technical means that the moving contact 85 moves along the X-axis direction, the relay 1 can more fully utilize the space in each direction, and the structure is more compact, which creates more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0222] In the embodiments, the connection terminal 21 of at least one static contact 19 is located between the static contact point 20 and the coil winding 41 along the X-axis direction, which increases the distance between the two connection terminals 21 along the X-axis direction, so that the two static contacts 19 are less likely to be short-circuited, and the demand for external mutual inductor installation can be met.

[0223] In each embodiment, the eighth overcurrent portion 34 of the second stationary contact 23 forms a cross-flow portion, which is located outside the movable contact group 72 along the Z-axis direction and is connected to the connecting terminal 21 along the opening direction. The magnetic field generated by the current of the cross-flow portion acts on the overcurrent bridge 86 in the overcurrent direction of the Z-axis direction, generating a magnetic force on the overcurrent bridge 86 towards the stationary contact group 7, which enables the movable contact group 72 to be more reliably closed with the stationary contact group 7. Since the magnetic force increases with the increase of the current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from separating from the stationary contact group 7, thereby avoiding the relay 1 from being damaged by destructive arc pulling.

[0224] In each embodiment, the movable magnetic conductor group 73 and the stationary magnetic conductor 8 form an anti-short-circuit magnetic loop M1 when the overcurrent bridge 86 flows along the Z-axis direction, thereby enabling the movable magnetic conductor group 73 and the movable contact group 72 to be subjected to a magnetic force in the closing direction, which enables the movable contact group 72 to be more reliably closed with the stationary contact group 7. Since the magnetic force increases with the increase of the current, when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from separating from the stationary contact group 7, thereby avoiding the relay 1 from being damaged by destructive arc pulling.

[0225] In each embodiment, the movable magnetic conductor 90 is arranged corresponding to the movable contact 85, so that an anti-short-circuit magnetic loop M1 can be formed around each movable contact 85, which enables each movable contact 85 to be less likely to separate from the stationary contact group 7. The magnetic conductor body 91 is fixedly connected to the back of the overcurrent bridge 86, which enables the magnetic field generated by the current of the overcurrent bridge 86 to be mostly constrained in the anti-short-circuit magnetic loop, thereby improving the magnetic efficiency. The extension 92 extends from the magnetic conductor body 91 along the closing direction, so that when the movable contact group 72 is closed with the stationary contact group 7, the air gap between the movable magnetic conductor 90 and the stationary magnetic conductor 8 is smaller, the magnetic resistance of the anti-short-circuit magnetic loop M1 is smaller, and the movable contact group 72 is less likely to separate from the stationary contact group 7. Therefore, the movable contact group 72 can be more reliably closed with the stationary contact group 7, and when the relay 1 bears a fault large current, it is beneficial to avoid the movable contact group 72 from separating from the stationary contact group 7, thereby avoiding the relay 1 from being damaged by destructive arc pulling.

[0226] In each embodiment, the stationary magnetic conductor 8 is fixedly connected to the accommodating member 6, which enables the stationary magnetic conductor 8 to be more easily installed.

[0227] In each embodiment, the stationary contact points 20 of the two stationary contacts 19 are respectively located on the two sides of the stationary magnetic conductor 8 along the Z-axis direction, which enables the magnetic force formed by the anti-short-circuit magnetic loop M1 formed by the stationary magnetic conductor 8 and the movable magnetic conductor group 73 on the movable contact group 72 to be more balanced along the Z-axis direction, and the two movable contact points 87 are less likely to separate from the corresponding stationary contact points 20.

[0228] In each embodiment, the flow direction of the reflux portion is opposite to the flow direction of the overcurrent bridge 86, and the static magnetic conductor 8 is located between the reflux portion and the moving magnetic conductor group 73 along the X-axis direction, so that the magnetic field generated by the reflux portion due to the overcurrent is in the same direction as the magnetic field generated by the anti-short-circuit magnetic circuit M1 on the side of the static magnetic conductor 8, thereby strengthening the magnetic field intensity of the static magnetic conductor 8, making the magnetic force between the static magnetic conductor 8 and the moving magnetic conductor group 73 stronger, and making the moving contact group 72 less likely to be separated from the static contact group 7 when the relay 1 bears a fault current, thereby avoiding the relay 1 from being damaged due to a destructive arc.

[0229] In each 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 points 20 along the Z-axis direction, thereby increasing the creepage distance between the static contacts 19 and the static magnetic conductor 8 and improving the voltage resistance of the relay 1. Meanwhile, this is also conducive to reducing the distance between the two static contact points 20 along the Z-axis direction and conducive to reducing the size of the accommodating member 6 along the Z-axis direction, thereby creating more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0230] In each embodiment, the projection of the portion of all the static contact points 20 capable of contacting the moving contact group 72 on the second projection plane perpendicular to the Z-axis direction is located within the projection of the static magnetic conductor 8 on the second projection plane, and the surface of the static magnetic conductor 8 facing the moving magnetic conductor group 73 is closer to the moving magnetic conductor group 73 along the X-axis direction than all the static contact points 20. Therefore, when the moving contact group 72 breaks the arc from the static contact group 7, the magnetic field generated by the arcs on both sides is concentrated on the static magnetic conductor 8, making the arc less likely to spread along the Z-axis direction, thereby reducing the ablation of the surrounding accommodating member 6 caused by the arc escaping between the moving contact points 87 and the static contact points 20 and ensuring the service life of the relay 1. On this basis, the distance between the two static contact points 20 along the Z-axis direction can be designed to be closer, which is conducive to reducing the size of the accommodating member 6 along the Z-axis direction and creating more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space.

[0231] In each embodiment, the two blocking pieces 9 are fixed to the accommodating piece 6 and located outside the stationary contact group 7 along the Z-axis direction, each blocking piece 9 extends along the X-axis direction, so that the projection of each stationary contact 20 on a second projection plane perpendicular to the Z-axis direction is located within the projection of each blocking piece 9 on the second projection plane. Therefore, when the movable contact group 72 is disconnected from the stationary contact group 7 to pull the arc, the arc cannot be conducted to the two side walls of the accommodating piece 6 along the Z-axis direction, ensuring the insulation performance of the accommodating piece 6. The blocking piece 9 is made of high-temperature-resistant insulating material, which can prevent the arc heat from damaging the blocking piece 9 when the load is large and the arc pulling generates a lot of heat, avoiding damage to the blocking piece 9, and is beneficial to improve the load capacity of the relay 1.

[0232] In each embodiment, the elastic support group 74 is arranged between the pushing piece 70 and the movable contact group 72, which can provide an elastic force to the movable contact group 72 along the closing direction X1 after the pushing piece 70 experiences overstroke, so that the movable contact group 72 can be more reliably closed with the stationary contact group 7, and the movable contact group 72 is less likely to be separated from the stationary contact group 7 when the relay 1 bears a fault current, thereby avoiding damage to the relay 1 caused by destructive arc pulling. The elastic support group 74 can also generate an additional repulsive force when the movable contact group 72 is disconnected from the stationary contact group 7, helping the movable contact 85 to disconnect with the stationary contact group 7.

[0233] In each embodiment, by arranging the limiting piece 76, the distance between the movable contact group 72 and the stationary contact group 7 can meet the design requirements when the movable contact group 72 is disconnected from the stationary contact group 7.

[0234] In each embodiment, the armature assembly 38 and the pushing piece 70 are integrally formed by insert injection molding, avoiding errors that may occur during assembly of the armature assembly 38 and the pushing piece 70, and making the pushing piece 70 and the armature assembly 38 have higher integration and fewer components, which is beneficial to fully utilize the limited space.

[0235] In each embodiment, the connecting piece 71 and the pushing piece 70 are integrally formed by insert injection molding, making the limiting piece 76 more easily fixed relative to the pushing piece 70, and the limiting piece 76 is more rigid, the limiting effect on the movable contact group 72 is better, and the size of the relay 1 along the Z-axis direction can be saved; the two ends of the connecting piece 71 along the Y-axis direction respectively extend out of the pushing piece 70 to form a connecting end 84 fixed to the limiting piece 76, which can save the size of the relay 1 along the Z-axis direction, and create more favorable conditions for increasing the safety distance between the movable contact group 72 and the stationary contact group 7 in the limited space.

[0236] In various embodiments, the first elastic part 95 is arranged corresponding to the moving contact 85, and each moving contact 85 is fixedly connected to the corresponding first elastic part 95, so that each moving contact 85 can be adjusted in posture by the relatively independent first elastic part 95, and the two moving contact points 87 of the moving contact 85 can be reliably closed with the corresponding stationary contact point 20.

[0237] In various embodiments, the first elastic part 95 includes two first elastic arms 97 fixedly connected to the overcurrent bridge 86, which facilitates the free swinging of the moving contact 85 to adjust the posture. The positions where the two first elastic arms 97 are fixedly connected to the back of the overcurrent bridge 86 correspond to the two moving contact points 87 respectively, so that the elastic force of the two first elastic arms 97 can directly act on the two moving contact points 87, and the two moving contact points 87 can be more reliably closed with the corresponding stationary contact point 20.

[0238] In various embodiments, the elastic member 75 stores energy when the pushing member 70 moves in the disconnecting direction X2 due to deformation and releases energy when the pushing member 70 moves in the closing direction X1 due to recovery of the deformation, which can better help the moving contact group 72 to start from the disconnected position and approach the stationary contact group 7, and facilitates to increase the movement stroke of the moving contact group 72, so as to facilitate to increase the safety distance between the moving contact group 72 and the stationary contact group 7.

[0239] In various embodiments, the main body 98 of the elastic member 75 is in a sheet shape and is fixed relative to the pushing member 70, and the second elastic arms 101 extend to both sides of the Z-axis direction and can abut against the accommodating member 6, which can make the elastic member 75 occupy less space in the X-axis direction and have good elastic deformation capability, avoiding that when a spring is used as the elastic member 75, the compression length of the spring increases the size of the moving contact part 4 in the X-axis direction, so as to facilitate to reduce the size of the relay 1 in the X-axis direction, and thus can create more favorable conditions for increasing the safety distance between the moving contact group 72 and the stationary contact group 7 in a limited space.

[0240] In various embodiments, by arranging the micro switch 5, the on-off state of the relay 1 can be known by an external relay state sensing circuit. This facilitates the management of the relay 1.

[0241] In various embodiments, the stationary contact terminal 110 is located between the moving spring 83 and the coil winding 41 in 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 in the Z-axis direction when the stationary contact terminal 110 is arranged outside the winding assembly 37 in the Z-axis direction, and create more favorable conditions for increasing the safety distance between the moving contact group 72 and the stationary contact group 7 in a limited space. The moving spring 83 is fixedly connected to the pushing member 70, which makes the position and action of the moving spring 83 more certain.

[0242] In each embodiment, by setting the shielding cover 39, the magnetic field of the coil assembly 37 is compressed in the iron core 43 and the yoke 44, the magnetic field intensity between the two magnetic driving ends 45 is improved, which is conducive to improving the magnetic efficiency and the pushing force of the magnetic circuit part 3, can create more favorable conditions for increasing the safety distance between the moving contact group 72 and the static contact group 7 in a limited space, and can also avoid the influence of the magnetic circuit part 3 by the external magnetic field.

[0243] The above description and embodiment description are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application.

[0244] Each technical feature of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of each technical feature in the above-described embodiments are not described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0245] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A relay comprising a fixed part and a movable contact part, the fixed part being provided with a fixed contact, the movable contact part being provided with a movable contact, the movable contact part being capable of moving relative to the fixed part along an X-axis direction to cause the movable contact to close or open with the fixed contact along the X-axis direction; characterized in that: one of the fixed part 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 Y-axis direction and is capable of sliding along the X-axis direction with the sliding groove; at least one of the guide parts is a first guide part, the first guide part is provided with a contact-preventing part on both sides along a Z-axis direction, the contact-preventing part is capable of contacting a side groove wall of the sliding groove along the Z-axis direction, the contact-preventing part is adjacent to a rectifying part on both sides along the X-axis direction, the rectifying part forms a first projection on a first projection plane perpendicular to the Y-axis direction, an outer edge of the first projection is a convex curve, and a radius of curvature of the convex curve is greater than half of a size of the first guide part along the Z-axis direction; at least one of the first guide parts forms a second projection on the first projection plane, the second projection is an ellipse with a long axis extending along the X-axis direction; the first guide part is in an ellipsoid shape; the first guide part is in an elliptic cylinder shape; the contact-preventing part is a plane perpendicular to the Z-axis direction; the guide parts have only a second guide part in addition to the first guide part, the second guide part forms a third projection on the first projection plane, and the third projection is a circle; at least one of the sliding grooves is a first sliding groove, and a groove bottom of the first sliding groove is provided with a protrusion, the protrusion protrudes from the groove bottom along the Y-axis direction and extends along the X-axis direction; the first sliding groove is provided with a recess between the protrusion and a side groove wall on both sides of the first sliding groove; the number of the first sliding grooves is at least two, and openings of at least two of the first sliding grooves face or are away from each other along the Y-axis direction; the first sliding grooves with the openings facing or being away from each other along the Y-axis direction are arranged along the Y-axis direction; the fixed part comprises a receiving member and a fixed contact group fixed to each other, the fixed contact group comprises two fixed contacts, and the fixed contacts are arranged along the Z-axis direction; the movable contact part comprises a movable contact group, a pushing member, an elastic support group, and a limiting member; the movable contact group comprises a movable contact, and the movable contact is provided with the movable contacts at both ends along the Z-axis direction, the movable contacts are capable of closing or opening with the fixed contacts of the corresponding fixed contacts along the X-axis direction; the pushing member is capable of moving along the X-axis direction to drive the movable contacts to close or open with the fixed contacts along the X-axis direction; the elastic support group is arranged between the pushing member and the movable contact group along the X-axis direction; and the limiting member is fixed relative to the pushing member and abuts against the movable contact along an opening direction when the movable contacts open with the fixed contacts. ​ ​ ​ 2. A relay according to claim 1, characterised in that ​ 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. ​ 4. A relay according to claim 2, wherein the magnetic field generated by the coil is substantially uniform across the gap. ​ 5. A relay according to claim 1, wherein the magnetic circuit is formed by a magnetic core and a magnetic yoke, and the magnetic core is formed by a plurality of magnetic pieces. ​ 6. A relay according to claim 1, wherein ​ 7. A relay according to claim 1, wherein the magnetic circuit is formed by a magnetic core and a magnetic yoke, and the magnetic core is formed by a plurality of magnetic pieces. ​ 8. A relay according to claim 7, wherein the relay is a latching relay. ​ 9. A relay according to claim 7, wherein the relay is a latching relay. ​ 10. A relay according to claim 9, wherein the relay is a latching relay. ​ 11. A relay according to any one of claims 1 to 10, characterised in that: ​ ​ The accommodation member and the movable contact part are provided with the sliding grooves and the guide parts, respectively; at least one of the guide parts is provided with the limiting member, and the guide part provided with the limiting member is referred to as a near guide part.

12. A relay according to claim 11, wherein the relay is a latching relay. The near guide part is a first guide part.

13. A relay as described in claim 11 or 12, characterized in that, At least two of the near guide parts are arranged along the Z-axis direction.

14. A relay according to claim 11 or 12, characterised in that the relay is a miniature relay. At least two of the near guide parts are arranged on the limiting member along the Y-axis direction and extend into the corresponding sliding grooves away from each other along the Y-axis direction.

15. A relay according to claim 14, wherein the relay is a latching relay. The number of the near guide parts is two, and the two near guide parts are arranged along the Z-axis direction between the movable contact points at the two ends of the movable contact part.

16. A relay according to claim 11, wherein the relay is a miniature relay. The limiting member is further provided with a limiting body fixedly connected with 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 integrated, the limiting part can abut against the movable contact part along the disconnecting direction, the two connecting parts respectively extend from the two ends of the limiting part along the Y-axis direction along the disconnecting direction and are fixedly connected with the pushing member, and the near guide part extends from the connecting part along the Y-axis direction.

17. A relay according to claim 16, wherein the relay is a latching relay. The limiting member is made of metal, and the near guide part is stamped and formed on the connecting part.

18. A relay according to claim 16, wherein the relay is a miniature relay. The limiting body is made of metal, the near guide part is made of plastic, and the near guide part and the limiting body are integrally formed by insert injection molding, adhesion or threaded connection.

19. A relay according to claim 11, wherein the relay is a miniature relay. At least one of the guide parts is arranged on the pushing member, and the guide part arranged on the pushing member is referred to as a far guide part.

20. A relay according to claim 19, wherein the relay is a miniature relay. The far guide part is a first guide part.

21. A relay according to claim 19, wherein the relay is a miniature relay. At least one of the near guide parts and one of the far guide parts extend into the corresponding sliding grooves away from each other along the Y-axis direction.

22. A relay according to any one of claims 19 to 21, characterised in that At least two of the far guide parts are arranged along the Z-axis direction.

23. A relay according to any one of claims 19 to 21, characterised in that At least two of the far guide parts are arranged along the Y-axis direction and extend into the corresponding sliding grooves away from each other along the Y-axis direction.

24. A relay according to claim 23, wherein the relay is a miniature relay. The number of the far guide parts is two, and the two far guide parts are arranged along the Z-axis direction between the movable contact points at the two ends of the movable contact part.

25. A relay according to claim 1, wherein the relay is a miniature relay. The guide parts include two precisely matched guide parts and at least one non-precisely matched guide part, the two precisely matched guide parts are arranged along the Y-axis direction and extend into the corresponding sliding grooves away from each other along the Y-axis direction, and a matching gap formed between the precisely matched guide part and the corresponding sliding groove along the Z-axis direction is smaller than a matching gap formed between the non-precisely matched guide part and the corresponding sliding groove along the Z-axis direction.

26. A relay according to claim 11, wherein the relay is a miniature relay. The guide parts include two precisely matched guide parts and at least one non-precisely matched guide part, the two precisely matched guide parts are arranged along the Y-axis direction and extend into the corresponding sliding grooves away from each other along the Y-axis direction, and a matching gap formed between the precisely matched guide part and the corresponding sliding groove along the Z-axis direction is smaller than a matching gap formed between the non-precisely matched guide part and the corresponding sliding groove along the Z-axis direction.

27. A relay according to claim 26, wherein the relay is a miniature relay. The precisely matched guide part is the first guide part.

28. A relay according to claim 27, wherein the relay is a miniature relay. The precisely matched guide part is the near guide part.

29. A relay according to claim 28, wherein the relay is a miniature relay. The precise fitting guide portions are centrally located between the movable contact points at the ends of the movable contact along the Z-axis direction.

30. A relay according to any one of claims 26 to 29, wherein The guide portions include two non-precise fitting guide portions arranged along the Y-axis direction and extending into the corresponding sliding grooves away from each other along the Y-axis direction; the fitting clearance between the two non-precise fitting guide portions arranged along the Y-axis direction and the corresponding sliding grooves along the Y-axis direction is smaller than the fitting clearance between the two precise fitting guide portions and the corresponding sliding grooves along the Y-axis direction.

31. A relay according to claim 11, wherein the relay is a miniature relay. It further comprises a magnetic circuit part, which comprises: 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, and 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.

32. A relay according to claim 31, wherein the relay is a miniature relay. The projections of the two armatures on a first projection plane intersect with each other; the two magnetic driving ends are arranged along the Z-axis direction.

33. A relay according to claim 32, wherein the relay is a miniature relay. The armature assembly is integrally formed with the pusher by injection molding.

34. A relay according to claim 32, wherein the relay is a miniature relay. Each of the armatures is provided with two attraction portions corresponding to the two magnetic driving ends, which can attract the corresponding magnetic driving ends along the X-axis direction.

35. A relay according to claim 34, wherein: the movable contact is a reed. The two armatures are a first armature and a second armature, the two attraction portions of the first armature are a first attraction portion and a second attraction portion, and the two attraction portions of the second armature are a third attraction portion and a fourth attraction portion. The armature assembly moves 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 that the movable contact group is disconnected from the stationary contact group; in the second position, the fourth attraction portion and the second attraction portion attract the two magnetic driving ends respectively, so that the movable contact group is connected to the stationary contact group.

36. An electrical meter, characterized by It comprises the relay according to any one of claims 1 to 35.

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