Relay and electricity meter

Abstract

A relay and an electricity meter. The relay (1) comprises a fixed unit (2) and a movable contact unit (3), wherein the fixed unit comprises a static contact member set (9), which comprises two static contact members (27) arranged in an X-axis direction; the movable contact unit moves in a Y-axis direction relative to the fixed unit and comprises a movable contact member set (36) arranged corresponding to the static contact member set, the movable contact member set comprising movable contact members (48) that can connect to or disconnect from the static contact member set in the Y-axis direction and are each provided with two movable contact points (50) corresponding to the static contact members, the two movable contact points being arranged in the X-axis direction; and the movable contact unit is provided with a guiding portion (69) that is in sliding fit with the fixed unit along a straight line (L), the straight line extending in the Y-axis direction and being located between the two movable contact points in the X direction. The electricity meter uses the relay.

Description

Relays and electric meters

[0001] This disclosure claims priority to Chinese patent application No. 202410396703.4 filed on April 2, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the field of relays, and in particular to a relay and an electric meter. Background Art

[0003] A relay in the prior art includes a fixed unit, a moving contact unit, and a drive unit. The fixed unit includes a housing and a static contact assembly. The housing is used to accommodate the static contact assembly, the moving contact unit, and the drive unit. The static contact assembly is fixed to the housing and includes two static contacts arranged along the X-axis, which are used to connect to an external circuit. The moving contact unit moves relative to the fixed unit along the Y-axis and includes a pusher, an elastic bracket, and a moving contact assembly corresponding to the static contact assembly. The moving contact assembly includes a moving contact that can connect and disconnect with the static contact assembly along the Y-axis. When the moving contact is closed with the static contact assembly, the two static contacts are connected, thereby connecting the external circuit. When the moving contact is disconnected from the static contact assembly, the two static contacts are disconnected, thereby disconnecting the external circuit. The elastic bracket is positioned between the pusher and the moving contact assembly and is used to accommodate the moving contact assembly. The elastic bracket stores energy when the moving contact is closed with the static contact assembly and releases energy when the moving contact is disconnected. The driving unit is used to drive the pushing member to move relative to the fixed unit along the Y-axis direction. The driving unit includes a magnetic circuit portion. The magnetic circuit portion includes a coil assembly and an armature assembly, and the coil assembly is fixed to the accommodating member. When the magnetic circuit portion has a magnetic holding function, the magnetic circuit portion can adopt a swinging magnetic circuit portion, that is, the armature assembly swings relative to the coil assembly, and the tangential component of the armature assembly swing is transmitted to the pushing member, driving the moving contact unit to move linearly. Specifically, the armature assembly is provided with a swing arm, and the swing arm abuts and cooperates with the pushing member along the Y-axis direction. The swing arm serves as the output end of the driving portion and is used to drive the pushing member to move along the Y-axis direction.

[0004] In the prior art, some solutions incorporate guides to ensure the movement of the movable contact unit along the Y-axis. These guides are positioned on either side of the pusher along the X-axis. These guides are fixedly connected to the receiving member and slide in engagement with the pusher. However, in practice, the relay coil assembly in this prior art exhibits high energy consumption. Summary of the Invention

[0005] The purpose of the present disclosure is to overcome the above-mentioned defects or problems in the background technology and provide a relay and an electric meter with low energy consumption.

[0006] In order to achieve the above objectives, the following technical solutions are adopted:

[0007] The first technical solution relates to a relay, which includes a fixed unit and a moving contact unit, the fixed unit including a static contact group, the static contact group including two static contacts arranged along the X-axis direction; the moving contact unit moves relative to the fixed unit along the Y-axis direction and includes a dynamic contact group arranged corresponding to the static contact group, the dynamic contact group includes a dynamic contact, the dynamic contact can be connected or disconnected with the static contact group along the Y-axis direction and is provided with two moving contacts corresponding to the two static contacts respectively, and the two moving contacts are arranged along the X-axis direction; the moving contact unit is provided with a guide portion, the guide portion only slides with the fixed unit along a straight line, the straight line extends along the Y-axis direction and is located in the middle of the two moving contacts along the X-axis direction; the projection of the portion of the guide portion that slides with the fixed unit on the straight line does not coincide with the projection of the other parts of the moving contact unit except the guide portion on the straight line.

[0008] The second technical solution is based on the first technical solution, wherein the guide portion is located in the middle of the dynamic contact unit along the Z-axis direction.

[0009] The third technical solution is based on the first technical solution, wherein the movable contact is provided with a current bridge, the current bridge extends along the X-axis direction, and the two movable contacts are fixedly connected to the current bridge.

[0010] The fourth technical solution is based on the third technical solution, wherein the dynamic contact unit also includes a pushing member, an elastic bracket, a limiting member and a guiding member; the elastic bracket and the limiting member are both arranged corresponding to the dynamic contact group, and the elastic bracket is located between the pushing member and the dynamic contact group along the Y-axis direction. The limiting member is fixed relative to the pushing member and abuts the dynamic contact along the disconnection direction when the dynamic contact is disconnected from the static contact group to limit the distance between the dynamic contact and the static contact group; the guide member is fixed relative to the pushing member and extends along the straight line. The guide member is provided with a first guide portion extending out of the pushing member along the disconnection direction and a second guide portion extending out of the limiting member along the closing direction. The first guide portion and the second guide portion are both the guide portions.

[0011] The fifth technical solution is based on the fourth technical solution, wherein the dynamic contact unit also includes a connecting part, which is arranged corresponding to the limiting part and is injection-molded integrally with the pushing part insert; the pushing parts are extended from both ends of the connecting part along the Z-axis direction, and the limiting part is fixedly connected to both ends of the connecting part.

[0012] The sixth technical solution is based on the fourth technical solution, wherein the fixed unit also includes a receiving part and a first magnetic conductive group, and the moving contact unit also includes a second magnetic conductive group; the first magnetic conductive group is correspondingly arranged with the static contact group and is both fixed to the receiving part; the second magnetic conductive group is correspondingly arranged with the moving contact group and is fixed relative to the moving contact group; when the moving contact and the static contact group are closed, the second magnetic conductive group approaches the first magnetic conductive group along the closing direction, so that the first magnetic conductive group and the second magnetic conductive group form a magnetic circuit based on the current passing through the overcurrent bridge; the first guide portion slides in cooperation with the receiving part, and the second guide portion slides in cooperation with the receiving part and / or the first magnetic conductive group.

[0013] The seventh technical solution is based on the sixth technical solution, wherein the accommodating part includes a shell and a cover body; the shell is provided with a first groove, the cover body is fixed to the shell and is provided with a first plug block extending into the first groove along the Z-axis direction, and a first hole opening along the closing direction is formed between the bottom of the first groove and the first plug block, and the first guide portion and the first hole are slidably matched along the straight line.

[0014] The eighth technical solution is based on the seventh technical solution, wherein the first magnetic conductive body group is provided with a matching hole, and the second guide portion is slidably matched with the matching hole along the straight line.

[0015] The ninth technical solution is based on the seventh or eighth technical solution, wherein the shell is provided with a second groove, the cover body is provided with a second plug-in block extending into the second groove along the Z-axis direction, a second hole opening along the disconnection direction is formed between the bottom of the second groove and the second plug-in block, and the second guide portion and the second hole are slidably engaged along the straight line.

[0016] The tenth technical solution is based on the sixth technical solution, wherein the first magnetic conductor group includes a first magnetic conductor, which extends along the Z-axis direction and is located between two static contacts along the X-axis direction; the number of moving contacts in the moving contact group is more than two, and each moving contact is arranged along the Z-axis direction; the second magnetic conductor group includes a second magnetic conductor, which is arranged corresponding to the moving contacts in the moving contact group and is provided with a main body and an extension portion, the main body is fixed to the back of the overcurrent bridge and extends along the Z-axis direction, and the extension portion extends from both ends of the main body along the closing direction.

[0017] The eleventh technical solution is based on the tenth technical solution, wherein the accommodating member is provided with two blocking portions, and the two blocking portions are located on both sides of the first magnetic conductor along the X-axis direction and between the two static contact members.

[0018] The twelfth technical solution is based on the eleventh technical solution, wherein the number of moving contacts in the moving contact group is two, and the guide member is located between the current bridges of the two moving contacts along the Z-axis direction; in the second magnetic conductor, the extension portion close to the guide member along the Z-axis direction is provided with a first part and a second part along the X-axis direction, the first part and the second part are spaced apart along the X-axis direction, and the guide member passes through the gap between the first part and the second part.

[0019] The thirteenth technical solution is based on the sixth technical solution, which also includes an elastic member, which is located between the fixed unit and the movable contact unit along the Y-axis direction, and stores energy when the movable contact unit moves in the disconnecting direction, and releases energy when the movable contact unit moves in the closing direction.

[0020] The fourteenth technical solution is based on the thirteenth technical solution, wherein the elastic member is sleeved on the first guide portion, one end of the elastic member abuts against the fixed unit, and the other end of the elastic member elastically abuts against the movable contact unit.

[0021] The fifteenth technical solution is based on the fourteenth technical solution, wherein, when the movable contact and the static contact group are closed, the elastic member applies an elastic force to the movable contact unit along the closing direction.

[0022] The sixteenth technical solution is based on the fourth technical solution, which also includes a driving unit, which is used to drive the pushing member to move relative to the fixed unit along the Y-axis direction and includes a magnetic circuit part, and the magnetic circuit part includes a coil assembly and an armature assembly. The coil assembly is fixed to the accommodating member and drives the armature assembly to rotate around a first rotating axis extending along the Z-axis direction. The output end of the driving unit abuts against the pushing member along the Y-axis direction to convert the rotation of the armature assembly into linear motion of the pushing member along the Y-axis direction.

[0023] The seventeenth technical solution is based on the sixteenth technical solution, wherein the magnetic circuit portion and the moving contact unit are arranged along the X-axis direction.

[0024] The eighteenth technical solution is based on the seventeenth technical solution, wherein the driving unit further includes a rotating member, which rotates around a second rotating axis extending along the Z-axis direction and is provided with a first end and a second end on both sides of the second rotating axis, the second end being the output end of the driving unit, the armature assembly being provided with two first abutting surfaces opposite to or opposite to each other, the first end being capable of abutting the two first abutting surfaces, and the pushing member being provided with two second abutting surfaces opposite to or opposite to each other along the Y-axis direction, the second end being capable of abutting the two second abutting surfaces.

[0025] The nineteenth technical solution is based on the eighteenth technical solution, wherein the pushing member is provided with a pushing cavity, two second abutting surfaces are arranged on two opposite walls of the pushing cavity along the Y-axis direction, the second end portion extends into the pushing cavity and is provided with two protrusions along the Z-axis direction, the two protrusions are arranged at intervals along the Z-axis direction, and the guide member passes through the interval between the two protrusions.

[0026] The twentieth technical solution is based on the eighteenth technical solution, wherein, when the dynamic contact member and the static contact member group are closed, the projection of the contact point between the second end portion and the second abutting surface on the first projection plane is located within the projection of the guide member on the first projection plane, and the first projection plane is perpendicular to the Z-axis direction.

[0027] The twenty-first technical solution relates to an electric meter, which includes the relay as described in any one of the first to twentieth technical solutions.

[0028] Compared with the prior art, the above solution has the following beneficial effects:

[0029] In the prior art, guide members are arranged on both sides of the push member along the X-axis direction. The applicant has found through observation, experimentation and research that the reason why the coil assembly of the relay in the prior art consumes a lot of energy is that once the two guide members arranged along the X-axis direction are not parallel to each other, the push member is prone to jamming when moving linearly along the Y-axis direction. Therefore, the driving part is required to output a greater driving force to drive the push member to switch positions. In order to output a greater driving force, the energy consumption of the coil assembly is relatively large. In the first technical solution, the moving contact unit is provided with a guide portion, and the guide portion only slides with the fixed unit along the straight line, and the straight line extends along the Y-axis direction. Therefore, when the guide portion slides with the fixed unit, it will not get stuck because the two guide members are not parallel to each other. Therefore, the driving force required to be output by the driving unit is smaller than that of the prior art, and the energy consumption of the coil assembly is lower than that of the prior art. The guide portion is set to be located in the middle of the two moving contacts along the X-axis direction. The torque formed by the reaction force of the static contact group on the moving contact can also correct the posture of the moving contact in a more balanced manner, so that the two moving contacts of the moving contact remain arranged along the X-axis direction, and the two moving contacts can apply the same force to the corresponding static contacts.

[0030] In the prior art, guides are located on either side of the pusher along the X-axis. Since the movable contact also extends along the X-axis, the guides need to be placed outside the movable contact along the X-axis. This increases the X-axis dimensions of the relay, making the structure less compact and occupying more space. In the first technical solution, the guide is located midway between the two movable contacts along the X-axis. This reduces the X-axis dimensions of the relay, resulting in a more compact structure and a smaller footprint.

[0031] In the prior art, the guide member slides with the pusher in the movable contact unit and is fixed to the receiving member. In the first technical solution, the movable contact unit is provided with a guide portion that slides with the fixed unit. This can reduce the impact of debris that may be generated when the guide member slides on the movable contact, avoid increasing contact resistance, and thus better ensure the relay's voltage resistance.

[0032] In the first technical solution, the projection of the portion of the guide portion that slides with the fixed unit on the straight line does not overlap with the projection of the other portions of the moving contact unit excluding the guide portion on the straight line. This means that the portion of the guide portion that slides with the fixed unit must be located only outside the other portions of the moving contact unit excluding the guide portion along the Y-axis direction. Therefore, compared to the technical solution in which the guide portion is located on one or both sides of the moving contact unit along the Z-axis direction, the sliding engagement portion is smaller in size along the Y-axis direction, resulting in less friction, and thus less driving force required by the drive unit and less energy consumption by the coil assembly. At the same time, the sliding engagement portion is further distanced from the point where the moving contact and the stationary contact contact contact each other, thereby further reducing the impact of debris generated by the sliding engagement on the moving contact.

[0033] In the first technical solution, the movable contact unit is provided with a guide portion, which should be interpreted as moving with the movable contact unit along the Y-axis. The guide portion can be fixed relative to the pusher, fixed relative to the movable contact assembly, or partially fixed relative to the pusher and partially fixed relative to the movable contact assembly. The guide portion slides with the fixed unit only along the straight line. When there is only one guide portion, it should be interpreted as extending along the Y-axis; when there are two or more guide portions, each guide portion is arranged only along the Y-axis.

[0034] In the second technical solution, the guide portion is located in the middle of the moving touch unit along the Z-axis direction, which can better guide the moving touch unit to move along the Y-axis direction, making the moving touch unit less likely to deflect up and down, thereby improving the stability of the moving touch unit movement.

[0035] The third technical solution is a specific implementation method of the first technical solution. The overcurrent bridge extends along the X-axis direction, and the two moving contacts are fixedly connected to the overcurrent bridge. At this time, the safe distance between the moving contact and the static contact group in the relay is twice the actual distance when the moving contact and the static contact are disconnected. Therefore, the relay has higher safety and stronger voltage resistance.

[0036] In the fourth technical solution, the elastic bracket is arranged between the pushing member and the moving contact group. After the pushing member experiences an overstroke, it can provide an elastic force toward the static contact group to the moving contact, so that the moving contact is better closed with the static contact group. It can also generate additional repulsive force when the moving contact is separated from the static contact group, helping the moving contact to move away from the static contact group. By setting a limiter, it can be ensured that the distance between the moving contact and the static contact group meets the design requirements. The first guide part is located behind the pushing member, and the second guide part is located in front of the limiter. The first guide part and the second guide part are both formed on the guide part, so that the moving contact unit can slide and cooperate with the fixed unit in the front and back of the Y-axis direction, which has a better guiding effect and higher stability in the movement of the moving contact unit.

[0037] In the fifth technical solution, the connecting member and the pushing member are insert-molded as one piece, so that the limiting member is easier to fix relative to the pushing member, and the limiting member has stronger rigidity and better limiting effect on the dynamic contact member.

[0038] In the sixth technical solution, the first magnetic conductive group and the static contact group are relatively fixed, and the second magnetic conductive group and the moving contact group are relatively fixed. The first magnetic conductive group and the second magnetic conductive group form a magnetic circuit based on the current passing through the overcurrent bridge, which can form a magnetic attraction between the first magnetic conductive group and the second magnetic conductive group. Therefore, when the relay is impacted by a large fault current, the moving contact and the static contact group are less likely to disengage, thereby avoiding the generation of destructive arcs that damage the relay.

[0039] In the seventh technical solution, the first hole that slides with the first guide portion is formed by plugging the shell and the cover body, so the installation is more convenient.

[0040] In the eighth technical solution, the second guide part slides with the first magnetic conductor group. Since the second guide part and the first magnetic conductor group can both be made of metal materials, compared with the sliding cooperation of the second guide part and the accommodating part, less debris can be formed near the moving contact and the static contact, and the impact on the moving contact and the static contact is smaller, which can avoid the increase of contact resistance and thus better ensure the voltage resistance of the relay.

[0041] In the ninth technical solution, the second hole, which slides with the second guide, is formed by inserting the housing and the cover together, making installation more convenient. The second guide slides with the second hole, making it more difficult for debris to escape from the second hole, minimizing the impact on the moving and stationary contacts, preventing an increase in contact resistance, and thus further ensuring the relay's voltage resistance.

[0042] In the tenth technical solution, the first magnetic conductor is provided in the first magnetic conductor group, making installation more convenient. The second magnetic conductor is provided corresponding to the movable contacts in the movable contact group, thereby forming a magnetic circuit around each movable contact, making it difficult for each movable contact to disengage from the stationary contact group. The extensions extend from both ends of the body in the closing direction. Therefore, when the movable contact and the stationary contact group are closed, the air gap between the first and second magnetic conductors is smaller, the magnetic resistance of the magnetic circuit is reduced, and the movable contact is more difficult to disengage from the stationary contact group.

[0043] In the eleventh technical solution, a barrier portion is provided on the accommodating member to separate the first magnetic conductor from the static contacts on both sides, thereby making it less likely for the two static contacts to be short-circuited through the first magnetic conductor located in the middle.

[0044] In the twelfth technical solution, the guide member is positioned along the Z-axis between the current bridges of the two moving contacts. This ensures that the guide member provides uniform guidance to each moving contact along the Z-axis, making each moving contact less susceptible to vertical deflection. The guide member passes through the gap between the first portion and the second portion. This not only allows the second magnetic conductor to yield to the guide member, but also forms a magnetic circuit on both the left and right sides of the guide member along the X-axis, ensuring magnetic efficiency and ensuring that the moving contact is subjected to uniform force on both sides of the guide member along the X-axis, making the moving contact less susceptible to horizontal deflection.

[0045] In the thirteenth technical solution, the elastic member stores energy due to deformation when the moving contact moves in the disconnecting direction and releases energy due to recovery of deformation when the moving contact moves in the closing direction. This can better help the moving contact unit start from the disconnected position and approach the static contact group, which is beneficial to increase the movement stroke of the moving contact, and therefore also beneficial to increase the safety distance between the moving contact and the static contact.

[0046] In the fourteenth technical solution, the elastic member is sleeved on the first guide portion, one end of the elastic member abuts against the fixed unit, and the other end elastically abuts against the movable contact unit. The structure is more compact and occupies less space.

[0047] In the fifteenth technical solution, when the moving contact and the static contact group are closed, the elastic member applies elastic force to the moving contact unit along the closing direction, which can improve the stability of the moving contact and the static contact group in the closed state, and further improve the short-circuit resistance, that is, improve the ability of the relay to prevent the moving contact from being disengaged from the static contact group when it is subjected to a large fault current.

[0048] The sixteenth technical solution is a specific implementation method using a swinging magnetic circuit portion. The use of a swinging magnetic circuit portion can effectively amplify the tangential motion stroke of the armature assembly, which is beneficial to increasing the safe distance between the moving contact and the static contact assembly.

[0049] In the seventeenth technical solution, the magnetic circuit part and the moving contact unit are spaced apart along the X-axis direction, which can prevent the relay from being too large in the movement direction (Y-axis direction) of the moving contact unit, so the structure is more compact and occupies less space; at the same time, it can prevent the magnetic circuit part from affecting the linear movement of the moving contact unit along the Y-axis direction, thereby ensuring a larger safety distance between the moving contact and the static contact.

[0050] In the eighteenth technical solution, the tangential component of the movement of the armature assembly is transmitted to the pushing member through the rotating member. On the one hand, it is convenient to adjust the distance between the magnetic circuit part and the moving contact unit along the X-axis direction. On the other hand, compared with the technical solution of directly extending the swing arm from the armature assembly, the ratio of the resistance arm to the power arm is smaller, and the required magnetic driving force is smaller.

[0051] In the nineteenth technical solution, the second end is extended into the pushing cavity, so that the pusher and the rotating member can be more tightly matched. By providing two protrusions spaced apart along the Z-axis, the guide member can be made to give way.

[0052] In the twentieth technical solution, when the moving contact and the static contact group are closed, the projection of the contact point between the second end and the second abutting surface on the first projection plane is located within the projection of the guide member on the first projection plane, which means that when the moving contact and the static contact group are closed, the force point of the moving contact unit is within the width range of the guide member, so the moving contact unit will not generate a deflection torque, which can ensure that the moving contact is correctly closed with the static contact group along the Y-axis direction.

[0053] The electric meter in the twenty-first technical solution has the technical effects corresponding to the technical solution it references. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solution of the embodiment, the following briefly introduces the drawings required for use:

[0055] FIG1 is an exploded perspective view of a relay according to an embodiment of the present disclosure;

[0056] FIG2 is a top view of the housing in an embodiment of the present disclosure;

[0057] FIG3 is a top view of the accommodation component in an embodiment of the present disclosure;

[0058] FIG4 is a cross-sectional view along line AA in FIG3 ;

[0059] FIG5 is a cross-sectional view along line BB in FIG3 ;

[0060] FIG6 is a cross-sectional view taken along line CC in FIG3 ;

[0061] FIG7 is a schematic structural diagram of a static contact assembly and a dynamic contact unit in an embodiment of the present disclosure;

[0062] FIG8 is a perspective view of a first magnetic conductive group in an embodiment of the present disclosure;

[0063] FIG9 is an exploded perspective view of a moving contact unit in an embodiment of the present disclosure;

[0064] FIG10 is a front view of the movable contact unit in an embodiment of the present disclosure;

[0065] FIG11 is a cross-sectional view along line DD in FIG10 ;

[0066] FIG12 is a top view of the drive unit when the relay is in the off state according to an embodiment of the present disclosure;

[0067] FIG13 is a top view of the drive unit when the relay is in the on state according to an embodiment of the present disclosure;

[0068] FIG14 is a perspective view of a rotating member in an embodiment of the present disclosure;

[0069] FIG15 is a perspective view of a micro switch according to an embodiment of the present disclosure;

[0070] FIG16 is a perspective view of a relay in an embodiment of the present disclosure;

[0071] FIG17 is a schematic diagram of the internal structure of the relay in the off state according to an embodiment of the present disclosure;

[0072] FIG18 is a top view of the relay in the off state according to an embodiment of the present disclosure;

[0073] FIG19 is a cross-sectional view along line EE in FIG18;

[0074] FIG20 is a schematic diagram of the internal structure of the relay in the on state according to an embodiment of the present disclosure;

[0075] FIG21 is a top view of the relay in the on state according to the embodiment of the present disclosure;

[0076] FIG22 is a cross-sectional view taken along line FF in FIG21 .

[0077] Explanation of the main reference numerals: 1. relay; 2. fixing unit; 3. moving contact unit; 4. elastic member; 5. driving unit; 6. micro switch; 7. shielding cover; 8. accommodating member; 9. static contact member group; 10. first magnetic conductive member group; 11. separator group; 12. housing; 13. cover; 14. first slot; 15. second slot; 16. accommodating slot; 17. main body slot; 18. insertion slot; 19. blocking portion; 20. separator slot; 21. first rotating shaft hole; 22. second rotating shaft hole; 23. First plug-in block; 24. Second plug-in block; 25. First hole; 26. Second hole; 27. Static contact; 28. Static contact point; 29. ​​First magnetic conductor; 30. Main body; 31. Insertion portion; 32. Matching hole; 33. Separator; 34. Pusher; 35. Connector; 36. Dynamic contact group; 37. Second magnetic conductor group; 38. Elastic bracket; 39. Limiter; 40. Guide member; 41. Pusher cavity; 42. Second abutment surface; 43. First through hole hole; 44, groove; 45, connecting column; 46, connecting end; 47, second through hole; 48, moving contact; 49, overcurrent bridge; 50, moving contact; 51, second magnetic conductor; 52, body; 53, extension; 54, first part; 55, second part; 56, frame; 57, elastic support; 58, third through hole; 59, connecting hole; 60, elastic arm; 61, limit part; 62, connecting part; 63, fourth through hole; 64, avoidance Hole; 65, assembly hole; 66, protrusion; 67, first guide portion; 68, second guide portion; 69, guide portion; 70, magnetic circuit portion; 71, rotating member; 72, coil assembly; 73, armature assembly; 74, first rotating shaft; 75, connecting groove; 76, first abutting surface; 77, second rotating shaft; 78, first end portion; 79, second end portion; 80, pushing portion; 81, protrusion; 82, movable spring; Y1, closing direction; Y2, opening direction. DETAILED DESCRIPTION

[0078] In the claims and the specification except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the feature with one of the above directions is perpendicular to the feature with the other direction, and do not require that they must be implemented in accordance with the "X-axis direction", "Y-axis direction" and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction. Among them, the X-axis direction can be divided into left and right; the Y-axis direction can be divided into closing direction Y1 and opening direction Y2, among which the closing direction Y1 refers to the movement direction of the moving contact when it moves in the direction of closing with the static contact group, that is, forward, and the opening direction Y2 refers to the movement direction of the moving contact when it moves in the direction of opening with the static contact group, that is, backward; the Z-axis direction can be divided into up and down.

[0079] In the claims and the description, unless otherwise defined, the terms "first", "second" or "third", etc. are intended to distinguish different objects rather than to describe a specific order.

[0080] In the claims and the specification, unless otherwise specified, the terms "fixed connection", "fixed connection" or "relatively fixed" should be understood in a broad sense, that is, any connection method in which there is no displacement relationship or relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0081] In the claims and the description, unless otherwise defined, the terms "include", "have" and their variations mean "including but not limited to".

[0082] In the claims and the description, unless otherwise defined, the term "provided with" means that the technical feature thereafter is part of the technical feature therefor.

[0083] In the claims and description, unless otherwise specified, the term "group" means a collection, which may include one element or multiple elements, unless otherwise specified. For example, a "moving contact group" may include one moving contact or more than two moving contacts.

[0084] In the claims and specification, unless otherwise specified, the term "the movable contact unit is provided with a guide portion" means that the guide portion moves with the movement of the movable contact unit along the Y-axis. The guide portion may be fixed relative to the pusher, fixed relative to the movable contact assembly, or partially fixed relative to the pusher and partially fixed relative to the movable contact assembly.

[0085] In the claims and description, unless otherwise specified, the term "the guide portion slides with the fixed unit only along a straight line" means that when there is only one guide portion, the guide portion extends along the Y-axis direction; and when there are more than two guide portions, each guide portion is arranged only along the Y-axis direction.

[0086] The technical solutions in the embodiments will be described clearly and completely below with reference to the accompanying drawings.

[0087] Example

[0088] Relay 1 is used to receive electrical signals to control the on / off of an external circuit. Specifically, in this embodiment, relay 1 is a magnetic latching relay that controls the on / off of the external circuit by receiving pulsed electrical signals. In this embodiment, the external circuit is single-phase AC power. Relay 1 controls the on / off of the single-phase AC power. When relay 1 is in the off state, the external circuit is off; when relay 1 is in the on state, the external circuit is on.

[0089] 1 , which shows the structure of a relay 1 in this embodiment, as shown in FIG1 . As shown in FIG1 , the relay 1 includes a fixing unit 2 , a movable contact unit 3 , an elastic member 4 , a driving unit 5 , a micro switch 6 , and a shielding cover 7 .

[0090] As shown in Figure 1, the fixing unit 2 in this embodiment includes an accommodating member 8, a static contact member group 9, a first magnetic conductive member group 10, and a separator group 11. The accommodating member 8, the static contact member group 9, the first magnetic conductive member group 10, and the separator group 11 are fixed relative to each other.

[0091] Referring to Figures 1 to 6 , the container 8 in this embodiment is shown. The container 8 is used to accommodate and mount the static contact assembly 9, the first magnetic conductor assembly 10, the separator assembly 11, the movable contact unit 3, the elastic member 4, the drive unit 5, and the microswitch 6. As in the prior art, the container 8 is made of an insulating material. In this embodiment, it is formed by plastic injection molding.

[0092] As shown in FIG. 1 , the accommodating member 8 includes a shell 12 and a cover 13 .

[0093] As shown in Figure 2, the housing 12 has an upward-opening cavity. The cavity can be divided into a left cavity and a right cavity. The left cavity is provided with a first slot 14, a second slot 15, and a receiving slot 16. The first slot 14 is located at the rear end of the left cavity along the Y-axis and opens upward along the Z-axis. The second slot 15 is located at the front end of the left cavity along the Y-axis and opens upward along the Z-axis. The receiving slot 16 is located behind and adjacent to the second slot 15 along the Y-axis. The receiving slot 16 opens upward and includes a main slot 17 and an insertion slot 18. Blocking portions 19 are provided on both the left and right sides of the receiving slot 16 along the X-axis. The left cavity is provided with a partition slot 20 on both the left and right sides along the X-axis. The partition slot 20 opens upward along the Z-axis and extends along the Y-axis. A first rotation axis hole 21 is provided in the center of the right cavity, and a second rotation axis hole 22 is provided at the junction of the left and right cavities.

[0094] The cover 13 is used to cover the opening of the cavity of the shell 12 and is fixedly connected to the shell 12. In this embodiment, the cover 13 is snap-fitted with the shell 12. As shown in Figures 4 to 6, the cover 13 is provided with a first plug-in block 23 and a second plug-in block 24. The first plug-in block 23 is arranged along the Z-axis direction corresponding to the first slot 14. The first plug-in block 23 extends into the first slot 14 along the Z-axis direction, and a first hole 25 is formed between the bottom of the first slot 14 and the first plug-in block 23. The first hole 25 opens along the closing direction Y1. In this embodiment, the closing direction Y1 refers to the direction of movement of the moving contact 48 when it moves in the direction of closing with the static contact group 9, that is, forward. The second plug-in block 24 is arranged along the Z-axis direction corresponding to the second slot 15. The second plug-in block 24 extends into the second slot 15 along the Z-axis direction, and a second hole 26 is formed between the bottom of the second slot 15 and the second plug-in block 24. The second hole 26 opens along the opening direction Y2. In this embodiment, the disconnection direction Y2 refers to the direction of movement of the movable contact 48 toward disconnection from the static contact assembly 9, i.e., backward. As shown in Figures 5 and 6 , the main body slot 17 and the insertion slot 18 are arranged and connected along the Z-axis. The insertion slot 18 is located below the main body slot 17.

[0095] Referring to Figure 7 , FIG7 illustrates the static contact assembly 9 in this embodiment. The static contact assembly 9 is fixedly attached to the accommodating member 8 and is used to electrically connect to an external circuit. The static contact assembly 9 includes two static contacts 27 arranged along the X-axis. One of the two static contacts 27 is used to connect to a power source, and the other is used to connect to a load. Each static contact 27 is provided with a static contact point 28, which faces the moving contact unit 3. Each static contact 27 has two static contacts 28, which are arranged along the Z-axis.

[0096] Referring to Figures 7 and 8, Figures 7 and 8 show the first magnet group 10 in this embodiment. The first magnet group 10 is arranged corresponding to the static contact group 9 and is fixed to the housing 12. As shown in Figure 8, the first magnet group 10 includes a first magnet 29. The first magnet 29 is made of a magnetic material and can be placed in the receiving groove 16. After being inserted into the receiving groove 16, the first magnet 29 can be fixed to the housing 12 by dispensing. The first magnet 29 is provided with a main body 30 that can be inserted into the main body groove 17 and an insertion portion 31 that can be inserted into the groove 18. The main body 30 extends along the Z-axis direction and is provided with a matching hole 32. The matching hole 32 passes through the main body 30 along the Y-axis direction. The insertion portion 31 is located below the main body 30 along the Z-axis direction and extends downward.

[0097] Referring to Figure 1 , it illustrates the separator assembly 11 in this embodiment. As shown in Figure 1 , the separator assembly 11 is positioned corresponding to the static contact assembly 9 . The separator assembly 11 includes two sheet-shaped separators 33 made of a high-temperature-resistant insulating material. In this embodiment, the separators 33 are made of ceramic. The two separators 33 are arranged along the X-axis and can be inserted into corresponding separation slots 20 for secure connection to the housing 12 . The two separators 33 are located on either side of the static contact assembly 9 along the X-axis.

[0098] 9 to 11 , which illustrate the movable contact unit 3 of this embodiment. As shown in FIG9 , the movable contact unit 3 moves relative to the fixed unit 2 along the Y-axis and includes a pusher 34 , a connector 35 , a movable contact assembly 36 , a second magnetic conductor assembly 37 , an elastic bracket 38 , a stopper 39 , and a guide 40 .

[0099] As shown in Figure 9, the pusher 34 has a push cavity 41 at its rear portion along the Y-axis. The push cavity 41 opens to the right along the X-axis. Two second abutment surfaces 42 are provided on opposing walls of the push cavity 41 along the Y-axis. The two second abutment surfaces 42 are disposed opposite each other along the Y-axis. In other embodiments, the two second abutment surfaces 42 may also be disposed in opposite directions. The pusher 34 has a first through hole 43 along the Y-axis. The first through hole 43 extends through the pusher 34 along a straight line L extending along the Y-axis.

[0100] As shown in FIG11 , a groove 44 is provided at the rear end of the first through hole 43. The groove 44 opens rearward and has a diameter larger than that of the first through hole 43. As shown in FIG9 , two connecting posts 45 are provided on the front surface of the pusher 34 along the Y-axis. The two connecting posts 45 are arranged along the Z-axis, and the first through hole 43 is located between the two connecting posts 45 along the Z-axis. The connecting posts 45 extend forward along the Y-axis.

[0101] As shown in Figure 9 , the connector 35 is made of metal and is insert-molded integrally with the pusher 34. The connector 35 extends along the Z-axis. Its two ends, along the Z-axis, extend beyond the pusher 34 to form two connecting ends 46. As shown in Figure 11 , a second through-hole 47 is provided in the middle of the connector 35 along the Z-axis. The second through-hole 47 extends through the connector 35 along a straight line L.

[0102] As shown in Figure 9, the moving contact group 36 is arranged corresponding to the static contact group 9. The moving contact group 36 includes a moving contact 48. In this embodiment, the number of moving contacts 48 in the moving contact group 36 is two, and the two moving contacts 48 are arranged at intervals along the Z-axis direction. Each moving contact 48 is provided with an overcurrent bridge 49 and two moving contacts 50. The overcurrent bridge 49 extends along the X-axis direction, and the two moving contacts 50 are fixed to the overcurrent bridge 49 and arranged along the X-axis direction. The two moving contacts 50 can contact or move away from the corresponding static contact 27 along the Y-axis direction. In this embodiment, the moving contact 50 and the static contact 28 are arranged correspondingly along the Y-axis direction. When the moving contact 50 moves away from the corresponding static contact 28 along the Y-axis direction, the moving contact 48 is disconnected from the static contact group 9 along the Y-axis direction, the two static contacts 27 cannot conduct electricity with each other, the relay 1 is in the off state, and the external circuit is turned off. When the moving contact 50 contacts the corresponding static contact 28 along the Y-axis direction, the moving contact 48 and the static contact group 9 are closed along the Y-axis direction, the two static contacts 27 are electrically connected through the moving contact 48, the relay 1 is in the on state, and the external circuit is turned on.

[0103] As shown in Figure 9, the second magnet group 37 is arranged corresponding to the moving contact group 36 and is fixed relative to the moving contact group 36. The second magnet group 37 includes two second magnets 51, and the two second magnets 51 are arranged corresponding to the two moving contacts 48. Specifically, the second magnets 51 are made of magnetic conductive material, and each second magnet 51 is provided with a main body 52 and two extensions 53. The main body 52 extends along the Z-axis direction and is fixed to the back side of the overcurrent bridge 49 of the corresponding moving contact 48. The two extensions 53 extend from both ends of the main body 52 along the Z-axis direction along the closing direction Y1. In this embodiment, of the two extensions 53 of each second magnet 51, the extension 53 close to the other second magnet 51 is provided with a first portion 54 and a second portion 55 along the X-axis direction, and the first portion 54 and the second portion 55 are spaced apart along the X-axis direction.

[0104] As shown in Figure 9, the elastic bracket 38 is disposed in correspondence with the movable contact assembly 36. The elastic bracket 38 is used to mount the corresponding movable contact assembly 36 and comprises a frame 56 and two elastic support portions 57. A third through-hole 58 is defined in the middle portion of the frame 56 along the Z-axis. The third through-hole 58 extends through the frame 56 along a straight line L. The frame 56 is provided with two connecting holes 59 along the Z-axis. The third through-hole 58 is located between the two connecting holes 59 along the Z-axis. The two connecting holes 59 are adapted to accommodate the corresponding connecting posts 45. The two elastic support portions 57 are disposed along the Y-axis in correspondence with the two movable contacts 48 in the movable contact assembly 36. The two elastic support portions 57 are disposed along the Z-axis. Each elastic support portion 57 is provided with two elastic arms 60, which extend from either side of the frame 56 along the X-axis and are at least partially inclined away from the pusher 34 along the Y-axis. The free ends of the two elastic arms 60 are respectively fixed to the back surface of the overcurrent bridge 49 , and the positions where they are fixed to the overcurrent bridge 49 are respectively located on the back surface of the two movable contacts 50 along the Y-axis direction.

[0105] As shown in Figure 9, the limiting member 39 is provided corresponding to the connecting member 35. The limiting member 39 is provided with a limiting portion 61 and two connecting portions 62. The limiting portion 61 extends along the Z-axis direction perpendicular to the Y-axis direction. When the moving contact 48 is disconnected from the static contact group 9, the limiting portion 61 abuts against the moving contact 48 along the disconnection direction Y2 to limit the distance between the moving contact 48 and the static contact group 9. A fourth through hole 63 is provided in the middle of the limiting portion 61. The fourth through hole 63 is passed through along the straight line L. The limiting portion 61 is also provided with an avoidance hole 64 for each extension portion 53 of the second magnetic conductive group 37 to extend along the Y-axis direction. The connecting portions 62 extend from both ends of the limiting portion 61 along the Z-axis direction along the disconnection direction Y2. Each connecting portion 62 is provided with an assembly hole 65, and the assembly hole 65 is adapted and fixed to the corresponding connecting end 46 of the connecting member 35.

[0106] As shown in FIG9 , in this embodiment, the guide member 40 is made of metal and extends along the Y-axis direction. The guide member 40 is provided with a protrusion 66 at a rear position along the Y-axis direction. The protrusion 66 can be inserted into the groove 44 along the Y-axis direction.

[0107] As shown in Figures 9, 10, and 11, in this embodiment, the connecting posts 45 are correspondingly inserted into the connecting holes 59, and the movable contact 48 is fixed to the elastic support portion 57 of the elastic bracket 38. Specifically, the back side of the current bridge 49 along the X-axis is fixed to the free ends of the two elastic arms 60 of the same elastic support portion 57. This positions the elastic bracket 38 between the pusher 34 and the movable contact assembly 36, storing energy when the movable contact 48 and the static contact assembly 9 are closed, and releasing energy when the movable contact 48 and the static contact assembly 9 are disconnected. The bodies 52 of the two second magnetic conductors 51 are fixed to the back side of the current bridge 49 of the corresponding movable contact 48.

[0108] The two assembly holes 65 of the stopper 39 mate with and are fixedly connected to the corresponding connection ends 46, securing the stopper 39 relative to the pusher 34. When the movable contact 48 is disconnected from the static contact assembly 9, the stopper portion 61 of the stopper 39 abuts the two movable contacts 48 in the disconnection direction Y2 to limit the distance between the two movable contacts 48 and the static contact assembly 9. When the movable contact 50 is not contacting the static contact 28, the stopper 39 acts on the elastic bracket 38 through the movable contact 48, securing the frame 56 relative to the pusher 34. When the movable contact 50 contacts the static contact 28, the static contact 28 exerts a reaction force on the movable contact 50, which in turn acts on the elastic bracket 38 through the movable contact 48, securing the frame 56 relative to the pusher 34. The extensions 53 of the second magnetic conductive assembly 37 extend out of the avoidance holes 64 in the closing direction Y1.

[0109] The guide member 40 is interference fit with the first through hole 43 of the push member 34 so that the guide member 40 is fixed relative to the push member 34. The guide member 40 can also be fixed to the push member 34 by other means such as insert injection molding. The protrusion 66 of the guide member 40 is located in the groove 44. The guide member 40 also passes through the second through hole 47, the third through hole 58 and the fourth through hole 63 along the straight line L. The guide member 40 passes through the gap between the first part 54 and the second part 55 of the same extension 53. The guide member 40 is also located between the overcurrent bridges 49 of the two moving contacts 48 along the Z-axis direction. The guide member 40 is located in the middle of the two moving contacts 50 along the X-axis direction. The guide member 40 is located in the middle of the moving contact unit 3 along the Z-axis direction. The projection of the guide member 40 on the first projection plane perpendicular to the Z-axis intersects with the projection of the moving contact 48 on the first projection plane.

[0110] In this embodiment, the guide member 40 is provided with a first guide portion 67 and a second guide portion 68. The first guide portion 67 extends out of the rear end face of the push member 34 along the disconnection direction Y2, and the second guide portion 68 extends out of the front end face of the limit member 39 along the closing direction Y1. The first guide portion 67 and the second guide portion 68 are both referred to as guide portions 69. In this embodiment, the first guide portion 67 and the second guide portion 68 are only arranged along the straight line L and slide in conjunction with the fixed unit 2 along the straight line L. The straight line L is located in the middle of the two moving contacts 50 along the X-axis direction. In this embodiment, the guide portion 69 slides in conjunction with the fixed unit 2 only along the straight line L, which means that when there is only one guide portion 69, the guide portion 69 extends along the Y-axis direction; and when there are more than two guide portions 69 (for example, the first guide portion 67 and the second guide portion 68 in this embodiment), each guide portion 69 is only arranged along the Y-axis direction.

[0111] Refer to Figure 11, which illustrates the elastic member 4 in this embodiment. As shown in Figure 11, in this embodiment, the elastic member 4 is a spring. The elastic member 4 is located between the fixed unit 2 and the movable contact unit 3 along the Y-axis direction. It stores energy when the movable contact unit 3 moves in the opening direction Y2 and releases energy when the movable contact unit 3 moves in the closing direction Y1. In this embodiment, the elastic member 4 is sleeved on the first guide portion 67, with one end abutting the accommodating member 8 in the fixed unit 2 and the other end elastically abutting the protrusion 66.

[0112] 12 to 14 , which illustrate the drive unit 5 in this embodiment, the drive unit 5 is configured to drive the pusher 34 to move along the Y-axis relative to the fixed unit 2. As shown in FIG12 , the drive unit 5 includes a magnetic circuit portion 70 and a rotating member 71.

[0113] As shown in Figure 12, the magnetic circuit part 70 includes a coil assembly 72 and an armature assembly 73. The coil assembly 72 is fixed to the housing 12 and is provided with two magnetic drive ends. The coil assembly 72 reverses the polarity temporarily formed by the two magnetic drive ends by receiving a pulse electrical signal. In this embodiment, the two magnetic drive ends are arranged along the Y-axis direction. The armature assembly 73 rotates around the first rotating shaft 74, and the first rotating shaft 74 extends along the Z-axis direction and rotates with the first rotating shaft hole 21. The magnetic circuit part 70 in this embodiment is a swinging magnetic circuit part with a magnetic holding function in the prior art. Its structure is well known to technicians in the relevant technical field and will not be repeated here. In this embodiment, the armature assembly 73 is also provided with a connecting groove 75, and the connecting groove 75 has two first abutting surfaces 76 opposite to each other. The connecting groove 75 is provided with an opening radially away from the coil assembly 72. In other embodiments, the two first abutting surfaces 76 can also be arranged in a direction away from each other.

[0114] As shown in Figures 12 to 14, the rotating member 71 rotates about the second rotating shaft 77, which extends along the Z-axis and rotatably engages with the second rotating shaft hole 22. The rotating member 71 is provided with a first end 78 and a second end 79 on either side of the second rotating shaft 77. The first end 78 extends from the opening of the connecting groove 75 into the connecting groove 75 and is capable of abutting the two first abutting surfaces 76. The second end 79 is the output end of the drive unit 5. The second end 79 is provided with two protrusions 81 along the Z-axis, and the two protrusions 81 are spaced apart along the Z-axis. In this embodiment, the rotating member 71 is further provided with a rearward-facing push portion 80 between the second end 79 and the second rotating shaft 77.

[0115] Figure 12 shows the state of the drive unit 5 when the armature assembly 73 is rotated to the first rotational position. At this time, the first end 78 of the rotating member 71 is pushed by the first abutment surface 76 located at the rear, causing the rotating member 71 to rotate clockwise to the first position. Figure 13 shows the state of the drive unit 5 when the armature assembly 73 is rotated to the second rotational position. At this time, the first end 78 of the rotating member 71 is pushed by the first abutment surface 76 located at the front, causing the rotating member 71 to rotate counterclockwise to the second position. When the rotating member 71 is in the second position, the second end 79 is located further forward along the Y-axis direction than when the rotating member 71 is in the first position.

[0116] Referring to Figure 15 , FIG15 illustrates the microswitch 6 in this embodiment. The microswitch 6 is configured to connect to the relay state sensing circuit to transmit a relay state signal to the relay state sensing circuit. As shown in FIG15 , the microswitch 6 is provided with a movable spring 82. The right end of the movable spring 82, along the X-axis, is connected to the base of the microswitch 6, and the left end of the movable spring 82 is elastically rotatable. When the left end of the movable spring 82 is pushed and deformed, approaching the base of the microswitch 6, the microswitch 6 is turned on, and the relay state sensing circuit senses that the relay 1 is in the off state. When the left end of the movable spring 82 is released, recovering its deformation, and moving away from the base of the microswitch 6, the microswitch 6 is turned off, and the relay state sensing circuit senses that the relay 1 is in the on state. In this embodiment, the movable spring 82 is pushed by the pushing portion 80. In other embodiments, the movable spring 82 may also be pushed by the pusher 34 or the armature assembly 73.

[0117] Referring to Figure 16 , the shielding cover 7 in this embodiment is shown. As shown in Figure 16 , the shielding cover 7 has two shielding walls perpendicular to the Z-axis and a connecting wall connecting the two shielding walls. The shielding cover 7 is positioned outside the accommodating member 8. Specifically, the two shielding walls of the shielding cover 7 are positioned above and below the magnetic circuit portion 70 along the Z-axis, while the connecting wall of the shielding cover 7 is positioned to the right of the magnetic circuit portion 70 along the X-axis.

[0118] 17 to 22 , which show the internal structure of the relay 1 in this embodiment.

[0119] As shown in Figures 17 to 19, in this embodiment, the magnetic circuit portion 70 and the moving contact unit 3 are arranged on the right and left sides of the cavity respectively along the X-axis direction. The first magnetic conductor 29 is placed in the accommodating groove 16 and fixed to the shell 12. Specifically, the main body 30 is placed in the main body groove 17, and the insertion portion 31 is placed in the insertion groove 18. The two blocking portions 19 are located on both sides of the first magnetic conductor 29 along the X-axis direction, and are located between the two static contacts 27 along the X-axis direction. The two partitions 33 are located on both sides of the static contact group 9 along the X-axis direction. One end of the elastic member 4 abuts the accommodating member 8, and the other end elastically abuts the protrusion 66. The first guide portion 67 slides with the first hole 25 along a straight line L. The second guide portion 68 slides with the matching hole 32 along the straight line L.

[0120] In other embodiments, the second guide portion 68 may be slidably engaged with the second hole 26 along the straight line L, or may be slidably engaged with both the engaging hole 32 and the second hole 26 along the straight line L. The projection of the portion of the guide portion 69 that slidably engages with the fixed unit 2 on the straight line L does not overlap with the projection of the remaining portion of the movable contact unit 3 excluding the guide portion 69 on the straight line L.

[0121] Specifically in this embodiment, the pusher 34, connector 35, movable contact assembly 36, second magnet assembly 37, elastic bracket 38, and stopper 39 are all located along the Y-axis between the portion where the first guide portion 67 slidably engages with the first hole 25 and the portion where the second guide portion 68 slidably engages with the mating hole 32, regardless of the position of the movable contact unit 3. Of course, the other portions of the guide member 40, other than the first guide portion 67 and the second guide portion 68, must not overlap with the aforementioned slidably engaged portions. The coil assembly 72 is fixed to the housing 12. The first rotating shaft 74 rotatably engages with the first rotating shaft hole 21. The armature assembly 73 rotates relative to the housing 12 about the first rotating shaft 74. The second rotating shaft 77 rotatably engages with the second rotating shaft hole 22. The rotating member 71 rotates relative to the housing 12 about the second rotating shaft 77. The second end 79 of the rotating member 71 extends into the pusher cavity 41. The guide member 40 passes through the space between the two protrusions 81.

[0122] As shown in Figures 17 to 19, when the armature assembly 73 rotates to the first rotational position, the rotating member 71 rotates to the first position, and the second end portion 79 abuts the rear second abutment surface 42 along the Y-axis direction, pushing the pusher 34 in the disconnection direction Y2, causing the elastic member 4 to deform and store energy until the movable contact 48 disconnects from the static contact assembly 9. The relay 1 is in the off state, and the external circuit is shut off. At this time, the abutting portion 80 pushes against the movable spring 82, causing it to deform and bring the left end of the movable spring 82 closer to the base of the microswitch 6. The microswitch 6 is turned on, and the relay state sensing circuit detects that the relay 1 is in the off state.

[0123] As shown in Figures 20 to 22, when the armature assembly 73 rotates to the second rotational position, the rotating member 71 rotates to the second position. The second end 79 abuts the front second abutment surface 42 along the Y-axis, pushing the pusher 34 in the closing direction Y1, causing the elastic member 4 to recover its deformation and release energy until the movable contact 48 and the static contact assembly 9 close. The relay 1 is in the on state, and the external circuit is turned on. In this embodiment, the elastic member 4 is pre-compressed. That is, the elastic member 4 still applies an elastic force along the closing direction Y1 to the movable contact unit 3. At this time, the projection of the contact point between the second end 79 and the second abutment surface 42 on the first projection plane perpendicular to the Z-axis lies within the projection of the guide member 40 on the first projection plane. At this time, the pushing portion 80 moves away from the movable spring 82, releasing the left end of the movable spring 82 and restoring its deformation. The left end of the movable spring 82 moves away from the base of the microswitch 6, turning off the microswitch 6, and the relay state sensing circuit detects that the relay 1 is in the on state.

[0124] As shown in Figure 22, when the movable contact 48 and the stationary contact assembly 9 are closed, the extension 53 of the second magnetic conductor 51 approaches or abuts the first magnetic conductor 29 along the closing direction Y1. Because current flows through the overcurrent bridge 49 of the movable contact 48 in the X-axis direction, two magnetic circuits based on the current passing through the two overcurrent bridges 49 are formed between the first magnetic conductor 29 and the two second magnetic conductors 51. These two magnetic circuits, as shown by the thick dashed lines in Figure 22, create a magnetic attraction between the first magnetic conductor 29 and the second magnetic conductors 51. Because the first magnetic conductor 29 is fixed relative to the stationary contact assembly 9 and the second magnetic conductor 51 is fixed relative to the movable contact 48, this magnetic attraction maintains the movable contact 48 and the stationary contact assembly 9 in the closed state. The greater the current passing through the overcurrent bridge 49, the greater the magnetic attraction.

[0125] In this embodiment, the movable contact unit 3 is provided with a guide portion 69. The guide portion 69 slides with the fixed unit 2 only along a straight line L, and the straight line L extends along the Y-axis. Therefore, when the guide portion 69 slides with the fixed unit 2, there is no jamming caused by the two guide members not being parallel to each other. As a result, the driving force required by the drive unit 5 is smaller than that of the prior art, and the energy consumption of the coil assembly 72 is lower than that of the prior art. The guide portion 69 is positioned along the X-axis in the middle of the two movable contacts 50. The torque generated by the reaction force of the static contact assembly 9 on the movable contact 48 can correct the posture of the movable contact 48, so that the two movable contacts 50 of the movable contact 48 remain arranged along the X-axis, thereby enabling the two movable contacts 50 to apply the same force to the corresponding static contact 27.

[0126] In this embodiment, the guide portion 69 is located in the middle of the two movable contacts 50 along the X-axis direction, which reduces the size of the relay 1 along the X-axis direction, so that the structure is more compact and occupies less space.

[0127] In this embodiment, the moving contact unit 3 is provided with a guide portion 69, which slides with the fixed unit 2, thereby reducing the impact of debris that may be generated when the guide member 40 slides on the moving contact 50, avoiding an increase in contact resistance, and thus better ensuring the voltage resistance of the relay 1.

[0128] In this embodiment, the projection of the portion of the guide portion 69 that slides with the fixed unit 2 on the line L does not overlap with the projection of the remaining portion of the movable contact unit 3 excluding the guide portion 69 on the line L. This means that the portion of the guide portion 69 that slides with the fixed unit 2 is necessarily located only outside the remaining portion of the movable contact unit 3 excluding the guide portion 69 along the Y-axis. Therefore, compared to a solution in which the guide portion 69 is located on one or both sides of the movable contact unit 3 along the Z-axis, the sliding engagement portion is smaller along the Y-axis, resulting in less friction, less required driving force from the drive unit 5, and less energy consumption by the coil assembly 72. Furthermore, the sliding engagement portion is positioned away from the contact point between the movable contact 48 and the stationary contact 27, further reducing the impact of debris generated by the sliding engagement on the movable contact 50.

[0129] In this embodiment, the guide portion 69 is located in the middle of the movable touch unit 3 along the Z-axis direction, which can better guide the movable touch unit 3 to move along the Y-axis direction, making the movable touch unit 3 less likely to deflect up and down, thereby improving the stability of the movement of the movable touch unit 3.

[0130] In this embodiment, the overcurrent bridge 49 extends along the X-axis direction, and the two moving contacts 50 are fixedly connected to the overcurrent bridge 49. At this time, the safety distance between the moving contact 48 and the static contact 27 in the relay 1 is twice the actual distance when the moving contact 48 and the static contact 27 are disconnected. Therefore, the relay 1 has higher safety and stronger voltage resistance.

[0131] In this embodiment, the elastic bracket 38 is arranged between the pushing member 34 and the moving contact group 36. After the pushing member 34 experiences an overstroke, it can provide an elastic force to the moving contact 48 toward the static contact group 9, so that the moving contact 48 can be better closed with the static contact group 9. It can also generate additional repulsive force when the moving contact 48 is separated from the static contact group 9, helping the moving contact 48 to move away from the static contact group 9.

[0132] This embodiment ensures that the distance between the movable contact assembly 36 and the stationary contact assembly 9 meets design requirements by providing a stopper. A first guide portion 67 is located behind the pusher 34, and a second guide portion 68 is located in front of the stopper 39. Both the first guide portion 67 and the second guide portion 68 are formed on the guide member 40. This allows the movable contact unit 3 to slide with the fixed unit 2 in both directions along the Y-axis, providing a more effective guide and greater stability in the movement of the movable contact unit 3.

[0133] In this embodiment, the connecting member 35 and the pushing member 34 are integrally formed by insert injection molding, so that the limiting member 39 is more easily fixed relative to the pushing member 34, and the limiting member 39 has stronger rigidity and better limiting effect on the movable contact member 48.

[0134] In this embodiment, the first magnetic conductive group 10 is relatively fixed to the static contact group 9, and the second magnetic conductive group 37 is relatively fixed to the moving contact group 36. The first magnetic conductive group 10 and the second magnetic conductive group 37 form a magnetic circuit based on the current passing through the overcurrent bridge 49, which can form a magnetic attraction between the first magnetic conductive group 10 and the second magnetic conductive group 37. Therefore, when the relay 1 is impacted by a large fault current, the moving contact 48 and the static contact group 9 are less likely to disengage, thereby avoiding the generation of destructive arcs that damage the relay 1.

[0135] In this embodiment, the first hole 25, which slides with the first guide portion 67, is formed by the plug-in connection between the housing 12 and the cover 13, making installation more convenient. The second hole 26, which slides with the second guide portion 68, is formed by the plug-in connection between the housing 12 and the cover 13, making installation even more convenient. The sliding engagement of the second guide portion 68 with the second hole 26 makes it more difficult for debris to escape from the second hole 26, minimizing the impact on the movable contact 50 and the stationary contact 28, thereby preventing an increase in contact resistance and further ensuring the withstand voltage capability of the relay 1.

[0136] In this embodiment, the second guide portion 68 slides with the first magnetic conductive group 10. Since both the second guide portion 68 and the first magnetic conductive group 10 can be made of metal materials, compared with the sliding cooperation of the second guide portion 68 and the accommodating member 8, less debris can be formed near the moving contact 50 and the static contact 28, and the impact on the moving contact 50 and the static contact 28 is smaller, which can avoid the increase of contact resistance, and thus can better ensure the voltage resistance of the relay 1.

[0137] In this embodiment, the first magnetic conductor 29 is provided in the first magnetic conductor group 10, facilitating installation. The second magnetic conductor 51 is provided corresponding to the movable contacts 48 in the movable contact group 36. This forms a magnetic circuit around each movable contact 48, making it difficult for each movable contact 48 to disengage from the stationary contact group 9. The extensions 53 extend from both ends of the body 52 in the closing direction Y1. Therefore, when the movable contact 48 and the stationary contact group 9 are closed, the air gap between the first magnetic conductor 29 and the second magnetic conductor 51 is minimized, reducing the magnetic resistance of the magnetic circuit and making it more difficult for the movable contact 48 to disengage from the stationary contact group 9.

[0138] In this embodiment, by providing a barrier portion 19 on the accommodating member 8 to separate the first magnetic conductor 29 from the static contacts 27 on both sides, the two static contacts 27 are less likely to be short-circuited through the first magnetic conductor 29 in the middle.

[0139] In this embodiment, the guide member 40 is positioned along the Z-axis between the current bridges 49 of the two movable contacts 48. This ensures that the guide member 40 provides uniform guidance to each movable contact 48 along the Z-axis, making each movable contact 48 less susceptible to vertical deflection. The guide member 40 passes through the gap between the first portion 54 and the second portion 55. This not only allows the second magnetic conductor 51 to give way to the guide member 40, but also allows magnetic circuits to be formed on both the left and right sides of the guide member 40 along the X-axis, ensuring magnetic efficiency. This also ensures that the movable contact 48 is subjected to uniform force on both sides of the guide member 40 along the X-axis, making the movable contact 48 less susceptible to horizontal deflection.

[0140] In this embodiment, the elastic member 4 stores energy due to deformation when the dynamic contact 48 moves in the disconnecting direction and releases energy due to restoration of deformation when the dynamic contact 48 moves in the closing direction. This can better help the dynamic contact unit 3 start from the disconnected position and approach the static contact group 9, which is beneficial to increase the movement stroke of the dynamic contact 48, and therefore also helps to increase the safety distance between the dynamic contact 48 and the static contact 27.

[0141] In this embodiment, the elastic member 4 is sleeved on the first guide portion 67 , with one end thereof abutting against the accommodating member 8 and the other end elastically abutting against the movable contact unit 3 , resulting in a more compact structure and smaller occupied space.

[0142] In this embodiment, when the moving contact 48 and the static contact group 9 are closed, the elastic member 4 applies an elastic force to the moving contact unit 3 along the closing direction Y1, which can improve the stability of the moving contact 48 and the static contact group 9 in the closed state, and further improve the short-circuit resistance, that is, improve the ability of the relay 1 to prevent the moving contact 48 from being disengaged from the static contact group 9 when it is subjected to a large fault current.

[0143] This embodiment can effectively amplify the tangential movement stroke of the armature assembly 73 by adopting the swinging magnetic circuit portion, which is beneficial to increase the safety distance between the movable contact 48 and the static contact assembly 9.

[0144] In this embodiment, the magnetic circuit portion 70 and the moving contact unit 3 are spaced apart along the X-axis direction, which can prevent the relay 1 from being too large in the movement direction (Y-axis direction) of the moving contact unit 3, so that the structure is more compact and occupies less space; at the same time, it can prevent the magnetic circuit portion 70 from affecting the linear movement of the moving contact unit 3 along the Y-axis direction, thereby ensuring a larger safety distance between the moving contact 50 and the static contact 28.

[0145] In this embodiment, the tangential component of the movement of the armature assembly 73 is transmitted to the pushing member 34 through the rotating member 71. On the one hand, it is convenient to adjust the spacing between the magnetic circuit part 70 and the moving contact unit 3 along the X-axis direction. On the other hand, compared with the technical solution of directly extending the swing arm from the armature assembly 73, the ratio of the resistance arm to the power arm is smaller, and the required magnetic driving force is smaller.

[0146] In this embodiment, the second end portion 79 extends into the pushing cavity 41, which can make the pusher 34 and the rotating member 71 fit more tightly together. By providing two protrusions 81 spaced apart along the Z-axis, the guide member 40 can be made to give way.

[0147] In this embodiment, when the moving contact 48 is closed with the static contact group 9, the projection of the contact point between the second end 79 and the second abutment surface 42 on the first projection plane is located within the projection of the guide member 40 on the first projection plane, which means that when the moving contact 48 is closed with the static contact group 9, the force point of the moving contact unit 3 is within the width range of the guide member 40, so the moving contact unit 3 will not generate a deflection torque, and can ensure that the moving contact 48 is correctly closed with the static contact group 9 along the Y-axis direction.

[0148] Because the currents flowing through the two moving contacts 50 are in opposite directions, when the moving contact 48 is disconnected from the stationary contact assembly 9, the arc generated between the two moving contacts 50 and the corresponding stationary contacts 28 is driven outward along the X-axis by the repulsive Lorentz magnetic force. In this embodiment, separators 33 are provided on both sides of the stationary contact assembly 9 along the X-axis, and these separators 33 are made of high-temperature resistant insulating material to prevent lateral arc overflow from damaging other parts of the relay 1.

[0149] In this embodiment, the provision of a microswitch 6 allows the status of the relay 1 to be transmitted to an external relay status sensing circuit. Furthermore, the dynamic spring 82 of the microswitch 6 provides thrust for the movement of the movable contact unit 3 in the closing direction Y1, accelerating the closing of the movable contact 48 and the static contact assembly 9.

[0150] The above specification and description of the embodiments are used to explain the protection scope of the present disclosure, but do not constitute a limitation on the protection scope of the present disclosure.

Claims

1. A relay comprising: A fixed unit (2), the fixed unit (2) comprising a static contact assembly (9), the static contact assembly (9) comprising two static contacts (27) arranged along the X-axis direction; A movable contact unit (3), wherein the movable contact unit (3) moves relative to the fixed unit (2) along the Y-axis direction and includes a movable contact group (36) arranged corresponding to the static contact group (9), the movable contact group (36) including a movable contact (48), the movable contact (48) being capable of connecting or disconnecting with the static contact group (9) along the Y-axis direction, and provided with two movable contact points (50) corresponding to the two static contacts (27), the two movable contact points (50) being arranged along the X-axis direction, the X-axis direction being perpendicular to the Y-axis direction; The movable contact unit (3) is provided with a guide portion (69), and the guide portion (69) is only slidably engaged with the fixed unit (2) along a straight line (L), and the straight line (L) extends along the Y-axis direction and is located in the middle of the two movable contacts (50) along the X-axis direction; the projection of the portion of the guide portion (69) that is slidably engaged with the fixed unit (2) on the straight line (L) does not overlap with the projection of the other portions of the movable contact unit (3) except the guide portion (69) on the straight line (L).

2. A relay as claimed in claim 1, characterized in that: The guide portion (69) is located in the middle of the movable contact unit (3) along the Z-axis direction, and the Z-axis direction is perpendicular to the Y-axis direction and the X-axis direction.

3. A relay as claimed in claim 1, characterized in that: The movable contact (48) is provided with a current-passing bridge (49), the current-passing bridge (49) extends along the X-axis direction, and two movable contact points (50) are fixedly connected to the current-passing bridge (49).

4. A relay as claimed in claim 3, characterized in that: The movable contact unit (3) further comprises a pusher (34), an elastic bracket (38), a limiting member (39) and a guide member (40); the elastic bracket (38) and the limiting member (39) are both arranged corresponding to the movable contact member group (36); the elastic bracket (38) is located between the pusher (34) and the movable contact member group (36) along the Y-axis direction; the limiting member (39) is fixed relative to the pusher (34) and abuts against the movable contact member (48) along the disconnection direction (Y2) when the movable contact member (48) is disconnected from the static contact member group (9). The movable contact (48) is used to limit the distance between the movable contact (48) and the static contact group (9); the guide member (40) is fixed relative to the push member (34) and extends along the straight line (L), and the guide member (40) is provided with a first guide portion (67) extending from the push member (34) along the disconnection direction (Y2) and a second guide portion (68) extending from the limit member (39) along the closing direction (Y1), and the first guide portion (67) and the second guide portion (68) are both the guide portion (69).

5. A relay as claimed in claim 4, characterized in that: The dynamic contact unit (3) further comprises a connecting member (35), the connecting member (35) being arranged corresponding to the limiting member (39) and being insert-molded integrally with the pushing member (34); the two ends of the connecting member (35) along the Z-axis direction respectively extend out of the pushing member (34), and the limiting member (39) is fixedly connected to the two ends of the connecting member (35).

6. A relay as claimed in claim 4, characterized in that: The fixed unit (2) also includes a receiving part (8) and a first magnetic conductive group (10), and the moving contact unit (3) also includes a second magnetic conductive group (37); the first magnetic conductive group (10) and the static contact group (9) are correspondingly arranged and are both fixed to the receiving part (8); the second magnetic conductive group (37) and the moving contact group (36) are correspondingly arranged and fixed relative to the moving contact group (36); when the moving contact (48) and the static contact group (9) are closed, the second magnetic conductive group (37) approaches the first magnetic conductive group (10) along the closing direction (Y1) so that the first magnetic conductive group (10) and the second magnetic conductive group (37) form a magnetic circuit based on the current passing through the overcurrent bridge (49); the first guide portion (67) is in sliding cooperation with the receiving part (8), and the second guide portion (68) is in sliding cooperation with the receiving part (8) and / or the first magnetic conductive group (10).

7. A relay as claimed in claim 6, characterized in that: The accommodating member (8) includes a shell (12) and a cover (13); the shell (12) is provided with a first groove (14); the cover (13) is fixedly connected to the shell (12) and is provided with a first plug (23) extending into the first groove (14) along the Z-axis direction; a first hole (25) opening along the closing direction (Y1) is formed between the bottom of the first groove (14) and the first plug (23); the first guide portion (67) and the first hole (25) are slidably matched along the straight line (L).

8. A relay as claimed in claim 7, characterized in that: The first magnetic conductor group (10) is provided with a matching hole (32), and the second guide portion (68) is slidably matched with the matching hole (32) along the straight line (L).

9. A relay as claimed in claim 7 or 8, characterized in that: The shell (12) is provided with a second groove (15), and the cover (13) is provided with a second plug (24) extending into the second groove (15) along the Z-axis direction. A second hole (26) opening along the disconnection direction (Y2) is formed between the bottom of the second groove (15) and the second plug (24), and the second guide portion (68) and the second hole (26) are slidably matched along the straight line (L).

10. A relay as claimed in claim 6, characterized in that: The first magnetic conductor group (10) includes a first magnetic conductor (29), which extends along the Z-axis direction and is located between two static contacts (27) along the X-axis direction; the number of dynamic contacts (48) in the dynamic contact group (36) is more than two, and each dynamic contact (48) is arranged along the Z-axis direction; the second magnetic conductor group (37) includes a second magnetic conductor (51), which is arranged corresponding to the dynamic contacts (48) in the dynamic contact group (36) and is provided with a main body (52) and an extension part (53), the main body (52) is fixed to the back side of the overcurrent bridge (49) and extends along the Z-axis direction, and the extension part (53) extends from both ends of the main body (52) along the closing direction (Y1).

11. A relay as claimed in claim 10, characterized in that: The accommodating member (8) is provided with two blocking portions (19), and the two blocking portions (19) are located on both sides of the first magnetic conductor (29) along the X-axis direction and between the two static contact members (27).

12. A relay as claimed in claim 11, characterized in that: There are two moving contacts (48) in the moving contact group (36), and the guide member (40) is located between the overcurrent bridges (49) of the two moving contacts (48) along the Z-axis direction; in the second magnetic conductor (51), an extension portion (53) close to the guide member (40) along the Z-axis direction is provided with a first portion (54) and a second portion (55) along the X-axis direction, the first portion (54) and the second portion (55) are spaced apart along the X-axis direction, and the guide member (40) passes through the space between the first portion (54) and the second portion (55).

13. A relay as claimed in claim 4, characterized in that: It also includes an elastic member (4), which is located between the fixed unit (2) and the movable contact unit (3) along the Y-axis direction and stores energy when the movable contact unit (3) moves along the disconnecting direction (Y2), and releases energy when the movable contact unit (3) moves along the closing direction (Y1).

14. A relay as claimed in claim 13, characterized in that: The elastic member (4) is sleeved on the first guide portion (67), one end of the elastic member (4) abuts against the fixed unit (2), and the other end elastically abuts against the movable contact unit (3).

15. A relay as claimed in claim 14, characterized in that: When the movable contact member (48) and the static contact member group (9) are closed, the elastic member (4) applies an elastic force to the movable contact unit (3) along the closing direction (Y1).

16. A relay as claimed in claim 4, characterized in that: The invention also includes a driving unit (5), which is used to drive the pushing member (34) to move relative to the fixed unit (2) along the Y-axis direction and includes a magnetic circuit part (70), wherein the magnetic circuit part (70) includes a coil assembly (72) and an armature assembly (73), wherein the coil assembly (72) is fixed to the accommodating member (8) and drives the armature assembly (73) to rotate around a first rotating shaft (74) extending along the Z-axis direction, and the output end of the driving unit (5) abuts against the pushing member (34) along the Y-axis direction to convert the rotation of the armature assembly (73) into a linear motion of the pushing member (34) along the Y-axis direction.

17. A relay as claimed in claim 16, characterized in that: The magnetic circuit portion (70) and the movable contact unit (3) are arranged along the X-axis direction.

18. A relay as claimed in claim 17, characterized in that: The driving unit (5) further includes a rotating member (71), which rotates around a second rotating shaft (77) extending in the Z-axis direction, and is provided with a first end (78) and a second end (79) on both sides of the second rotating shaft (77), wherein the second end (79) is the output end of the driving unit (5), and the armature assembly (73) is provided with two first abutting surfaces (76) that are opposite to or opposite to each other, and the first end (78) can abut against the two first abutting surfaces (76), and the pushing member (34) is provided with two second abutting surfaces (42) that are opposite to or opposite to each other in the Y-axis direction, and the second end (79) can abut against the two second abutting surfaces (42).

19. A relay as claimed in claim 18, characterized in that: The pushing member (34) is provided with a pushing cavity (41), two second abutting surfaces (42) are arranged on two opposite walls of the pushing cavity (41) along the Y-axis direction, the second end portion (79) extends into the pushing cavity (41) and is provided with two protrusions (81) along the Z-axis direction, the two protrusions (81) are arranged at intervals along the Z-axis direction, and the guide member (40) passes through the interval between the two protrusions (81).

20. A relay as claimed in claim 18, characterized in that: When the movable contact member (48) and the static contact member group (9) are closed, the projection of the contact point between the second end portion (79) and the second abutting surface (42) on the first projection plane is located within the projection of the guide member (40) on the first projection plane, and the first projection plane is perpendicular to the Z-axis direction.

21. An electric meter, characterized in that: It comprises a relay (1) as claimed in any one of claims 1 to 20.

Images