A load switch and an electric meter

Abstract

The utility model discloses a kind of load switch and electric meter, it is related to low-voltage electrical apparatus technical field.The load switch includes shell and the electromagnetic system being set in shell, contact mechanism and the terminal group being set to shell outside and being connected with contact mechanism, electromagnetic system, contact mechanism and terminal group are sequentially arranged along first direction, electromagnetic system includes magnetic circuit assembly, armature assembly and transmission part, magnetic circuit assembly includes yoke and coil module, coil module includes first coil and second coil, the first iron core of first coil and the second iron core of second coil produce magnetic circuit series connection, armature assembly is used for under the drive of coil module through transmission part and drives contact mechanism to open and close brake.This application provides the compact structure of load switch, smaller space is occupied, stronger applicability, and can effectively enhance anti-magnetic interference performance, avoid under the influence of external magnetic field Misoperation occurs, improve open and close brake precision and switch accuracy.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and more specifically, to a load switch and an electricity meter. Background Technology

[0002] The function of a load switch is to control the on / off state of the load in a circuit, so as to keep electrical appliances running safely. It is widely used in home appliances, remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the important control components.

[0003] Currently, load switches generally utilize magnetic circuit components to drive the armature assembly, thereby actuating the moving and stationary contacts to open and close. However, current load switches have poor resistance to magnetic interference, making them prone to malfunctions under the influence of external magnetic fields, resulting in low opening and closing accuracy and affecting switch precision. Adding additional anti-magnetic interference components would increase the load switch's size, requiring more assembly space and reducing its applicability. Furthermore, unreasonable layouts of load switches lead to larger dimensions in the arrangement direction, further increasing assembly space requirements. Therefore, there is an urgent need for a load switch product with strong anti-magnetic interference performance, high opening and closing accuracy, compact structure, and broad applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a load switch and an electricity meter that have a compact structure, occupy less space, have strong applicability, and can effectively enhance the anti-magnetic interference performance, avoid malfunctions under the influence of external magnetic fields, and improve the opening and closing accuracy and switching accuracy.

[0005] The embodiments of this application are implemented as follows:

[0006] A first aspect of this application provides a load switch, including a housing, an electromagnetic system disposed within the housing, a contact mechanism, and a terminal group disposed outside the housing and connected to the contact mechanism. The electromagnetic system, the contact mechanism, and the terminal group are arranged sequentially along a first direction. The electromagnetic system includes a magnetic circuit assembly, an armature assembly, and a transmission component. The magnetic circuit assembly includes a yoke and a coil module. The coil module includes a first coil and a second coil. The magnetic circuits generated by the first iron core of the first coil and the second iron core of the second coil are connected in series. The armature assembly is used to drive the contact mechanism to open and close the circuit under the drive of the coil module through the transmission component. This load switch has a compact structure, occupies less space, has strong applicability, and can effectively enhance anti-magnetic interference performance, avoid malfunctions under the influence of external magnetic fields, and improve the opening and closing accuracy and switching accuracy.

[0007] In one possible implementation, the coil module and armature assembly are arranged sequentially along a first direction, and the first coil and the second coil are arranged sequentially along a second direction, which is perpendicular to the first direction.

[0008] In one possible implementation, the first coil and the second coil are arranged sequentially along a first direction, and the coil module and the armature assembly are arranged sequentially along a second direction, which is perpendicular to the first direction.

[0009] In one possible implementation, the axes of the first coil and the second coil are both along the second direction. One end of the armature assembly is disposed adjacent to one end of the first iron core, and the other end of the armature assembly is disposed adjacent to one end of the second iron core. When energized, the magnetic induction lines of the first coil and the second coil are in opposite directions. The first coil and the second coil are used to apply magnetic force to the armature assembly when energized to assist the movement of the armature assembly.

[0010] As one possible implementation, the axial directions of the first coil and the second coil are both along a third direction. When energized, the magnetic induction lines of the first coil and the second coil are in opposite directions, and the second direction, the first direction, and the third direction are perpendicular to each other.

[0011] As one possible implementation, the armature assembly includes a housing and a first armature, a second armature, and a magnet mounted on the housing. The first armature and the second armature are disposed opposite to each other on both sides of the magnet. The housing is rotatably disposed inside the outer casing via a rotating shaft. The axis of the rotating shaft is along a third direction, which is perpendicular to both the first and second directions.

[0012] As one possible implementation, the magnetic yoke includes a first yoke, a second yoke, and a third yoke. The first yoke is connected to one end of the first iron core, the third yoke is connected to one end of the second iron core, and the other ends of the first and second iron cores are both connected to the second yoke.

[0013] In one possible implementation, the first yoke includes a first fixing part, a first connecting part, and a first extension part connected in sequence. A first iron core is connected between the second yoke and the first fixing part and is perpendicular to the second yoke. The second yoke and the first fixing part are arranged parallel to each other and spaced apart. The third yoke includes a second fixing part, a second connecting part, and a second extension part connected in sequence. A second iron core is connected between the second yoke and the second fixing part and is perpendicular to the second yoke. The second yoke and the second fixing part are arranged parallel to each other and spaced apart.

[0014] In one possible implementation, the first fixing part and the first extension part are arranged parallel to each other and are both perpendicular to the first connecting part, and the second yoke is disposed between the first fixing part and the first extension part; or, the first fixing part, the first connecting part and the first extension part are perpendicular to each other; or, the first fixing part and the first connecting part are located on the same plane and are both perpendicular to the first extension part.

[0015] In one possible implementation, the second fixing part and the second extension part are arranged parallel to each other and are both perpendicular to the second connecting part, and the second yoke is disposed between the second fixing part and the second extension part; or, the second fixing part, the second connecting part and the second extension part are perpendicular to each other; or, the second fixing part and the second connecting part are located on the same plane and are both perpendicular to the second extension part.

[0016] As one possible implementation, the armature assembly includes a limiting block and an elastic member. The limiting block has a sliding groove. One end of the transmission member is inserted into the sliding groove and cooperates with the sliding groove. The other end is connected to the moving contact unit of the contact mechanism. One end of the elastic member abuts against the armature assembly, and the other end abuts against the transmission member.

[0017] As one possible implementation, the contact mechanism includes a moving contact unit and a stationary contact unit, which are arranged sequentially along a first direction. The moving contact unit is connected to a transmission component, and one end of the moving contact unit can swing around the other end under the drive of the transmission component to open and close with the stationary contact unit.

[0018] As one possible implementation, the load switch also includes an arc-extinguishing mechanism, which is disposed inside the housing. The arc-extinguishing mechanism and the contact mechanism are arranged along a second direction, which is perpendicular to the first direction.

[0019] As one possible implementation, the terminal group includes a first terminal and a second terminal, the first terminal and the second terminal are located on the same side of the housing and both extend along a first direction and are connected to the contact mechanism.

[0020] A second aspect of this application provides an electricity meter including the aforementioned load switch. This electricity meter has a compact structure, occupies less space, has strong applicability, and can effectively enhance its anti-magnetic interference performance, preventing malfunctions under the influence of external magnetic fields, and improving the accuracy of opening and closing the circuit breaker and the precision of the switch.

[0021] The beneficial effects of the embodiments of this application include:

[0022] The load switch includes a housing, an electromagnetic system and a contact mechanism disposed within the housing, and a terminal group disposed outside the housing and connected to the contact mechanism. The electromagnetic system, the contact mechanism and the terminal group are arranged sequentially along a first direction. The electromagnetic system includes a magnetic circuit assembly, an armature assembly and a transmission component. The magnetic circuit assembly includes a magnetic yoke and a coil module. The coil module includes a first coil and a second coil. The magnetic circuits generated by the first iron core of the first coil and the second iron core of the second coil are connected in series. The armature assembly is used to drive the contact mechanism to open and close the switch through the transmission component under the drive of the coil module. The load switch provided in this application, through the electromagnetic system, contact mechanism, and terminal group arranged sequentially along a first direction, and the first and second iron cores connected in series in the magnetic circuit, can, on the one hand, rationally arrange the various components in the load switch, ensuring a compact structure, reducing volume and space occupation, and improving applicability; on the other hand, by setting the first and second coils, the magnetic field strength can be enhanced, the attraction force of the load switch can be increased, and the magnetic force generated by the first and second coils being energized can be counteracted by the external magnetic force to cancel the external magnetic interference force, thereby enhancing the anti-magnetic interference performance of the load switch, avoiding malfunctions under the influence of external magnetic fields, and improving the opening and closing accuracy and switching accuracy. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 An isometric view of the load switch provided in the first embodiment of this utility model;

[0025] Figure 2 This is a front view of the load switch provided in the first embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of the magnetic circuit assembly and armature assembly in the load switch provided in the first embodiment of this utility model from one perspective;

[0027] Figure 4 for Figure 3 A schematic diagram of the structure of the magnetic yoke from one perspective;

[0028] Figure 5 for Figure 3 A structural schematic diagram of the central magnetic yoke from another perspective;

[0029] Figure 6 Another structural schematic diagram of the cooperation between the magnetic circuit assembly and the armature assembly in the load switch provided in the first embodiment of this utility model;

[0030] Figure 7 An isometric view of a load switch provided in the second embodiment of this utility model;

[0031] Figure 8 This is a front view of the load switch provided in the second embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the magnetic circuit assembly in the load switch provided in the second embodiment of the present invention;

[0033] Figure 10 for Figure 9 Schematic diagram of the structure of the central magnetic yoke;

[0034] Figure 11 This is a schematic diagram of the magnetic circuit assembly in the load switch provided in the third embodiment of the present invention.

[0035] Icons: 100-Load switch; 110-Housing; 120-Magnetic circuit assembly; 121-First coil; 122-Second coil; 123-Yoke; 124-First yoke; 1241-First fixing part; 1242-First connecting part; 1243-First extension part; 125-First iron core; 126-Second yoke; 127-Second iron core; 128-Third yoke; 1281-Second fixing part; 1282-Second connecting part; 1283-Second extension part; 129-Coil module; 130-Armature assembly; 131-First end; 132-Second end; 133-Shell; 1331-Rotating shaft; 134-First armature; 1341-First magnetic attraction part; 135-Second armature; 1351-Second magnetic attraction part; 136-Limiting block; 1361-Slide groove; 1362-Limiting shaft; 137-Elastic element; 140-Transmission element; 150-Contact mechanism; 151-Moving contact unit; 152-Static contact unit; 160-Arc extinguishing mechanism; 170-Electromagnetic system; 180-Terminal group; 181-First terminal; 182-Second terminal. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this utility model, it should be noted that the terms "inner," "outer," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0042] First Embodiment

[0043] Please refer to the reference. Figures 1 to 6 This utility model provides a load switch 100 for interrupting and closing load current. It has a compact structure, occupies little space, is highly adaptable, and effectively enhances its anti-magnetic interference performance, preventing malfunctions under the influence of external magnetic fields, and improving the accuracy of opening and closing as well as the precision of the switch.

[0044] The load switch 100 includes a housing 110, an electromagnetic system 170 and a contact mechanism 150 disposed within the housing 110, and a terminal group 180 disposed outside the housing 110 and connected to the contact mechanism 150. The electromagnetic system 170, the contact mechanism 150, and the terminal group 180 are arranged sequentially along a first direction. The electromagnetic system 170 includes a magnetic circuit assembly 120, an armature assembly 130, and a transmission member 140. The magnetic circuit assembly 120 includes a magnetic yoke 123 and a coil module 129. The coil module 129 includes a first coil 121 and a second coil 122. The magnetic circuits generated by the first iron core 125 of the first coil 121 and the second iron core 127 of the second coil 122 are connected in series. The armature assembly 130 is used to drive the contact mechanism 150 to open and close the circuit under the drive of the coil module 129 via the transmission member 140.

[0045] The load switch 100 provided in this application, through the electromagnetic system 170, contact mechanism 150, and terminal group 180 arranged sequentially along a first direction, and the electromagnetic system 170 including a first iron core 125 and a second iron core 127 connected in series with magnetic circuits, can, on the one hand, rationally arrange the various components of the load switch 100, ensuring a compact structure, reducing volume and space occupation, and improving applicability; on the other hand, the arrangement of the first coil 121 and the second coil 122 can enhance the magnetic field strength of the load switch 100, increase the attraction force of the load switch 100, and further enable the magnetic force generated by the first coil 121 and the second coil 122 to counteract the external magnetic force, thereby canceling the external magnetic interference force, thus enhancing the anti-magnetic interference performance of the load switch 100, avoiding malfunctions under the influence of external magnetic fields, and improving the opening and closing accuracy and switching accuracy.

[0046] In this embodiment, the first coil 121 and the second coil 122 are arranged sequentially along the first direction, and the coil module 129 and the armature assembly 130 are arranged sequentially along the second direction, which is perpendicular to the first direction. This arrangement makes full use of the space in the load switch 100 along the first and second directions. However, this is not the only embodiment. In other embodiments, the coil module 129 and the armature assembly 130 are arranged sequentially along the first direction, and the first coil 121 and the second coil 122 are arranged sequentially along the second direction. The specific arrangement of the coil module 129 and the armature assembly 130, as well as the arrangement of the first coil 121 and the second coil 122 within the coil module 129, is not limited.

[0047] It should be noted that the axes of the first coil 121 and the second coil 122 are in the same direction, and when energized, the magnetic induction lines of the first coil 121 and the second coil 122 are in opposite directions (the current through the first coil 121 and the second coil 122 can be in series or in parallel). That is, the magnetic forces of the first coil 121 and the second coil 122 are in opposite directions when energized. In this way, under the interference of the external magnetic field, the first coil 121 and the second coil 122 work together to counteract the external magnetic force (if the external magnetic source weakens the magnetic field of the first coil 121, it will simultaneously strengthen the magnetic field of the second coil 122. Therefore, the overall interference force of the external magnetic source on the coil module 129 is greatly reduced or even completely canceled after being counteracted). This cancels the external magnetic interference force and achieves the effect of canceling the influence of the external magnetic field. This enhances the anti-magnetic interference performance of the load switch 100, prevents the load switch 100 from malfunctioning under the influence of the external magnetic field, and improves the opening and closing accuracy and switching accuracy.

[0048] In this embodiment, the second direction is horizontal and the first direction is vertical. The axial directions of the first coil 121 and the second coil 122 are both along the second direction. When the load switch 100 is in use, it is most susceptible to external magnetic sources set along the second direction. At this time, the axial directions of the first coil 121 and the second coil 122 are set along the second direction and are greatly affected by the external magnetic sources. However, the opposite magnetic field directions of the first coil 121 and the second coil 122 when they are energized can help resist external magnetic field interference.

[0049] Furthermore, one end of the armature assembly 130 is disposed adjacent to one end of the first iron core 125, and the other end of the armature assembly 130 is disposed adjacent to one end of the second iron core 127. That is, the first iron core 125 and one end of the armature assembly 130 are spaced apart along the second direction, and the second iron core 127 and the other end of the armature assembly 130 are spaced apart along the second direction. The first coil 121 and the second coil 122 are used to apply magnetic force to the armature assembly 130 when energized, so as to assist the movement of the armature assembly 130. In this way, the magnetic force generated by the first coil 121 and the second coil 122 when energized can, on the one hand, counteract external magnetic forces to play an anti-magnetic interference role, and on the other hand, generate attractive or repulsive forces on the armature assembly 130 to assist the movement of the armature assembly 130, thereby assisting the opening and closing of the contact mechanism 150 and improving the reliability of the opening and closing of the contact mechanism 150.

[0050] It should be noted that the first iron core 125 and the second iron core 127 are connected in series in terms of magnetic circuit. Whether the current is applied in the forward direction or the reverse direction, the magnetic directions of the first coil 121 and the second coil 122 are opposite. At this time, one end of the armature assembly 130 is arranged adjacent to one end of the first iron core 125, and the other end of the armature assembly 130 is arranged adjacent to one end of the second iron core 127. Therefore, it can further assist the movement of the armature assembly 130 as a whole. Specifically, the first coil 121 is used to apply an attractive force to one end of the armature assembly 130 when energized in the forward direction, while the second coil 122 is used to apply a repulsive force to the other end of the armature assembly 130 when energized in the forward direction, so as to assist the armature assembly 130 in moving, that is, to assist the armature assembly 130 in rotating clockwise relative to the housing 110, thereby assisting the contact mechanism 150 in opening the circuit; or, the first coil 121 is used to apply a repulsive force to one end of the armature assembly 130 when energized in the reverse direction, while the second coil 122 is used to apply an attractive force to the other end of the armature assembly 130 when energized in the reverse direction, so as to assist the armature assembly 130 in moving in the reverse direction, that is, to assist the armature assembly 130 in rotating counterclockwise relative to the housing 110, thereby assisting the contact mechanism 150 in closing the circuit.

[0051] In this embodiment, the first coil 121 and the second coil 122 are arranged sequentially along a first direction (vertical direction), with the first coil 121 positioned above the second coil 122. The armature assembly 130 has a first end 131 and a second end 132 arranged opposite each other in the first direction, with the first end 131 positioned above the second end 132. Specifically, the position of the first coil 121 corresponds to the position of the first end 131, and the distance between the first coil 121 and the first end 131 in the second direction is small to ensure that the magnetic force generated by the first coil 121 can exert a force (attractive or repulsive) on the first end 131. Similarly, the position of the second coil 122 corresponds to the position of the second end 132, and the distance between the second coil 122 and the second end 132 in the second direction is small to ensure that the magnetic force generated by the second coil 122 can exert a force (attractive or repulsive) on the second end 132. Specifically, when the first coil 121 exerts an attractive force on the first end 131, the second coil 122 exerts a repulsive force on the second end 132.

[0052] In one possible implementation, the magnetic yoke 123 includes a first yoke 124, a second yoke 126, and a third yoke 128. The first yoke 124 is connected to one end of the first iron core 125, the third yoke 128 is connected to one end of the second iron core 127, and the other ends of the first iron core 125 and the second iron core 127 are both connected to the second yoke 126.

[0053] Further, the first yoke 124 includes a first fixing part 1241, a first connecting part 1242, and a first extension part 1243 connected in sequence. The first extension part 1243 extends to the first end 131 of the armature assembly 130 to drive the armature assembly 130 to rotate relative to the outer casing 110 by magnetic force. In this embodiment, the first fixing part 1241, the first connecting part 1242, and the first extension part 1243 are integrally formed to improve the connection strength. The first iron core 125 is connected between the second yoke 126 and the first fixing part 1241 and is perpendicular to the second yoke 126. The second yoke 126 and the first fixing part 1241 are arranged in parallel and spaced apart. The axial direction of the first coil 121 is the same as the axial direction of the first iron core 125 and is perpendicular to the plane where the second yoke 126 and the first fixing part 1241 are located.

[0054] In one possible implementation, the first fixing portion 1241 and the first extension portion 1243 are arranged parallel to each other and are both perpendicular to the first connecting portion 1242. The second yoke 126 is disposed between the first fixing portion 1241 and the first extension portion 1243. Specifically, the first connecting portion 1242 is disposed above the first coil 121 and extends along the second direction to connect the first fixing portion 1241 and the first extension portion 1243, and facilitates the insertion of the first extension portion 1243 into the first end 131 of the armature assembly 130.

[0055] Correspondingly, the third yoke 128 has the same shape as the first yoke 124 and is symmetrically arranged with it. The third yoke 128 includes a second fixing part 1281, a second connecting part 1282, and a second extension part 1283 connected in sequence. The second extension part 1283 extends to the second end 132 of the armature assembly 130 to drive the armature assembly 130 to rotate relative to the outer casing 110 by magnetic force. In this embodiment, the second fixing part 1281, the second connecting part 1282, and the second extension part 1283 are integrally formed to improve the connection strength. The second core 127 is connected between the second yoke 126 and the second fixing part 1281 and is perpendicular to the second yoke 126. The second yoke 126 and the second fixing part 1281 are arranged parallel and spaced apart. The axial direction of the second coil 122 is the same as the axial direction of the second core 127 and is perpendicular to the plane where the second yoke 126 and the second fixing part 1281 are located.

[0056] Furthermore, the second fixing portion 1281 and the second extension portion 1283 are arranged parallel to each other and are both perpendicular to the second connecting portion 1282. The second yoke 126 is disposed between the second fixing portion 1281 and the second extension portion 1283. Specifically, the second connecting portion 1282 is disposed below the second coil 122 and extends along the second direction to connect the second fixing portion 1281 and the second extension portion 1283, and to facilitate the second extension portion 1283 extending into the second end 132 of the armature assembly 130.

[0057] In one possible implementation, the armature assembly 130 includes a housing 133 and a first armature 134, a second armature 135, and a magnet (not shown) mounted on the housing 133. The first armature 134 and the second armature 135 are disposed opposite each other on both sides of the magnet, and the two ends of the first armature 134 and the two ends of the second armature 135 can extend out of the housing 133. The housing 133 is rotatably disposed within the outer casing 110 via a pivot 1331, and the entire armature assembly 130 can rotate relative to the outer casing 110 about the pivot 1331. The axis of the pivot 1331 is along a third direction, which is perpendicular to both the first and second directions. Specifically, the first coil 121 and the second coil 122 can jointly drive the armature assembly 130 to rotate, thereby driving the contact mechanism 150 to open and close.

[0058] Furthermore, the first armature 134 is provided with two first magnetic attraction parts 1341, which are respectively located at both ends of the first armature 134, and the magnetic poles of the two first magnetic attraction parts 1341 are the same. The second armature 135 is provided with two second magnetic attraction parts 1351, which are respectively located at both ends of the second armature 135, and the magnetic poles of the two second magnetic attraction parts 1351 are the same. Specifically, one first magnetic attraction part 1341 and one second magnetic attraction part 1351 are located at the first end 131 of the armature assembly 130, and a first extension 1243 extends between the first magnetic attraction part 1341 and the second magnetic attraction part 1351; another first magnetic attraction part 1341 and another second magnetic attraction part 1351 are located at the second end 132 of the armature assembly 130, and a second extension 1283 extends between the first magnetic attraction part 1341 and the second magnetic attraction part 1351.

[0059] Specifically, a first magnetic attraction part 1341, a first extension part 1243, a second magnetic attraction part 1351, and a first coil 121 are arranged sequentially along a second direction, and another first magnetic attraction part 1341, a first extension part 1243, another second magnetic attraction part 1351, and a second coil 122 are arranged sequentially along the second direction. When the first coil 121 and the second coil 122 are energized, the first extension part 1243 and the second extension part 1283 generate magnetism. The first extension part 1243 generates a magnetic force on the first magnetic attraction part 1341 and the second magnetic attraction part 1351 located at the first end 131, thereby driving the housing 133 to rotate. The second extension part 1283 generates a magnetic force on the first magnetic attraction part 1341 and the second magnetic attraction part 1351 located at the second end 132, thereby driving the housing 133 to rotate. Since the first extension 1243 and the second extension 1283 have opposite magnetic properties, when the first extension 1243 generates an attractive force on the first magnetic attraction part 1341 and a repulsive force on the second magnetic attraction part 1351, the second extension 1283 generates a repulsive force on the first magnetic attraction part 1341 and an attractive force on the second magnetic attraction part 1351. Since the first extension 1243 and the second extension 1283 are disposed opposite to each other at both ends of the housing 133 along the first direction, the rotational force generated by the first extension 1243 and the second extension 1283 on the armature assembly 130 through the first magnetic attraction part 1341 and the second magnetic attraction part 1351 is the same, so as to play the main role of driving the armature assembly 130 to rotate clockwise or counterclockwise.

[0060] Furthermore, when the first coil 121 and the second coil 122 are energized, the two ends of the first coil 121 generate opposite magnetic fields, and the first coil 121 generates a magnetic force on the second magnetic attraction part 1351 located at the first end 131; the two ends of the second coil 122 generate opposite magnetic fields, and the second coil 122 generates a magnetic force on the second magnetic attraction part 1351 located at the second end 132. Since the magnetic properties of the end of the first coil 121 near the housing 133 are opposite to those of the end of the second coil 122 near the housing 133, when the first coil 121 generates an attractive force on the second magnetic attraction part 1351 located at the first end 131, the second coil 122 generates a repulsive force on the second magnetic attraction part 1351 located at the second end 132. Furthermore, since the position of the first coil 121 corresponds to the position of the first end 131, and the position of the second coil 122 corresponds to the position of the second end 132, the rotational force generated by the first coil 121 and the second coil 122 on the armature assembly 130 through the second magnetic attraction part 1351 is the same, thus playing an auxiliary role in driving the armature assembly 130 to rotate clockwise or counterclockwise.

[0061] In this embodiment, the magnetic poles of both first magnetic attraction parts 1341 are S poles, and the magnetic poles of both second magnetic attraction parts 1351 are N poles. When the first coil 121 and the second coil 122 are forward energized, the magnetic poles of the first extension part 1243 and the end of the first coil 121 away from the housing 133 are both S poles, and the magnetic pole of the end of the first coil 121 near the housing 133 is N pole. The magnetic poles of the second extension part 1283 and the end of the second coil 122 away from the housing 133 are both N poles, and the magnetic pole of the end of the second coil 122 near the housing 133 is S pole, thereby driving the armature assembly 130 to rotate counterclockwise. When the first coil 121 and the second coil 122 are energized in reverse, the magnetic poles of the first extension 1243 and the end of the first coil 121 away from the housing 133 are both N poles, and the magnetic pole of the end of the first coil 121 near the housing 133 is S pole. The magnetic poles of the second extension 1283 and the end of the second coil 122 away from the housing 133 are both S poles, and the magnetic pole of the end of the second coil 122 near the housing 133 is N pole, so as to drive the armature assembly 130 to rotate clockwise. Of course, in other embodiments, the magnetic poles of the two first magnetic attraction parts 1341 can be both N poles, and the magnetic poles of the two second magnetic attraction parts 1351 can be both S poles.

[0062] In one possible implementation, the contact mechanism 150 includes a moving contact unit 151 and a stationary contact unit 152. The moving contact unit 151 and the stationary contact unit 152 are arranged sequentially along a second direction. The moving contact unit 151 is connected to the transmission member 140. One end of the moving contact unit 151 can swing around the other end under the drive of the transmission member 140 to open and close with the stationary contact unit 152, thereby realizing the opening and closing function of the contact mechanism 150. Of course, the contact mechanism 150 can also be additionally equipped with a moving contact lead-out structure connected to the moving contact unit 151 and a stationary contact lead-out structure connected to the stationary contact unit 152, depending on the specific circumstances, to facilitate the connection of the contact mechanism 150 with the terminal group 180.

[0063] As one possible implementation, the load switch 100 also includes an arc-extinguishing mechanism 160. The arc-extinguishing mechanism 160 is disposed inside the housing 110, and the arc-extinguishing mechanism 160 and the contact mechanism 150 are arranged along a second direction. The arc-extinguishing mechanism 160 is used to extinguish the arc generated when the moving contact unit 151 and the stationary contact unit 152 are opened.

[0064] In one possible implementation, the terminal group 180 is used to connect the contact mechanism 150 and external equipment to realize the electrical connection between the load switch and the external equipment. It includes a first terminal 181 and a second terminal 182. The first terminal 181 and the second terminal 182 are located on the same side of the housing 110, both extending along a first direction, and both connected to the contact mechanism 150. In this embodiment, the first terminal 181 is connected to the moving contact unit 151, and the second terminal 182 is connected to the stationary contact unit 152 to realize the power connection function of the load switch 100. Of course, in other embodiments, the first terminal 181 can be connected to the stationary contact unit 152, and the second terminal 182 can be connected to the moving contact unit 151, depending on the position of the contact mechanism 150.

[0065] This application also provides an electricity meter (not shown), including the load switch 100 described above. Further, the coil module 129 of the load switch 100 is positioned close to the middle of the electricity meter to further reduce the influence of external magnetic sources on the load switch 100; one end of the terminal group 180 is connected to the contact mechanism 150, and the other end is connected to the wiring terminals on the electricity meter. Since the structure and beneficial effects of the load switch 100 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0066] Second Embodiment

[0067] Please refer to the reference. Figures 7 to 10 This utility model embodiment provides a load switch 100. Compared with the first embodiment, the difference of this embodiment lies in the different axial directions of the first coil 121 and the second coil 122, as well as the different structure of the magnetic yoke 123.

[0068] In this embodiment, the axial directions of the first coil 121 and the second coil 122 are both along a third direction. The second direction, the first direction, and the third direction are perpendicular to each other. The third direction is also horizontal and lies in the thickness direction of the load switch 100. When energized, the magnetic force directions of the first coil 121 and the second coil 122 are both located in the third direction, and the magnetic force directions are opposite (inward or outward along the third direction). Since the external magnetic force is usually located in the second direction, the external magnetic force direction is perpendicular to the magnetic force direction of the first coil 121 and the second coil 122, so that the first coil 121 and the second coil 122 produce a magnetic shielding effect, which can also avoid external magnetic field interference and enhance the anti-magnetic interference performance.

[0069] In one possible implementation, in the first yoke 124, the first fixing part 1241 and the first connecting part 1242 are located on the same plane and are both perpendicular to the first extension part 1243. The first fixing part 1241 and the first connecting part 1242 are both disposed on the outer side of the first coil 121 in the third direction (thickness direction of the load switch 100), and the second yoke 126 is disposed on the inner side of the first coil 121 in the third direction. The first connecting part 1242 can connect the first fixing part 1241 and the first extension part 1243, and facilitates the first extension part 1243 to extend into the first end 131 of the armature assembly 130.

[0070] Accordingly, in the third yoke 128, the second fixing part 1281 and the second connecting part 1282 are located on the same plane and are both perpendicular to the second extension part 1283. The second fixing part 1281 and the second connecting part 1282 are both disposed on the outer side of the second coil 122 in the third direction (thickness direction of the load switch 100), and the second yoke 126 is disposed on the inner side of the second coil 122 in the third direction. The second connecting part 1282 can connect the second fixing part 1281 and the second extension part 1283, and facilitates the second extension part 1283 to extend into the second end 132 of the armature assembly 130.

[0071] In one possible implementation, the armature assembly 130 further includes a limiting block 136 and an elastic member 137. The limiting block 136 is connected to the housing 133 and is located on the side of the housing 133 away from the magnetic circuit assembly 120. The limiting block 136 has a sliding groove 1361. One end of the transmission member 140 is inserted into the sliding groove 1361 and cooperates with the sliding groove 1361, while the other end is connected to the moving contact unit 151 of the contact mechanism 150. The end of the transmission member 140 can both rotate and slide relative to the sliding groove 1361. The elastic element 137 is connected between the limiting block 136 and the transmission element 140. When the magnetic circuit assembly 120 drives the contact mechanism 150 to close via the armature assembly 130 and the transmission element 140, the elastic element 137 deforms to provide contact pressure to the moving contact unit 151. The end of the transmission element 140 slides in the groove 1361 to provide contact overtravel for the moving contact unit 151. The elastic element 137 abuts against the end of the transmission element 140 to store elastic potential energy and generates an elastic force that prevents the end of the transmission element 140 from sliding within the groove 1361.

[0072] In this embodiment, the elastic element 137 is a torsion spring, and the limiting block 136 is provided with a limiting shaft 1362. The torsion spring is sleeved on the limiting shaft 1362, with one end of the torsion spring abutting against the armature assembly 130 and the other end abutting against the end of the transmission member 140 that extends into the slide groove 1361. In this way, when the moving contact unit 151 is closed, the elastic element 137 can generate elastic force to prevent the end of the transmission member 140 from sliding excessively in the slide groove 1361. When the magnetic circuit assembly 120 drives the armature assembly 130 to rotate, the end of the transmission member 140 slides in the slide groove 1361, while the elastic element 137 stores elastic potential energy and provides a reverse force when needed to ensure stable pressure when the moving contact unit 151 is in contact.

[0073] The beneficial effects of the load switch 100 provided in this embodiment are the same as those in the first embodiment, and will not be repeated here.

[0074] Third Embodiment

[0075] Please refer to Figure 11 This utility model embodiment provides a load switch 100. Compared with the second embodiment, the difference in this embodiment lies in the different structure of the magnetic yoke 123.

[0076] In one possible implementation, in the first yoke 124, the first fixing part 1241, the first connecting part 1242, and the first extension part 1243 are perpendicular to each other. The first fixing part 1241 is disposed inside the first coil 121 in the third direction (thickness direction of the load switch 100), the second yoke 126 is disposed outside the first coil 121 in the third direction, and the first connecting part 1242 is disposed above the first coil 121 and extends along the second direction to connect the first fixing part 1241 and the first extension part 1243, and facilitates the insertion of the first extension part 1243 into the first end 131 of the armature assembly 130. However, this is not the only option. In other embodiments, the first fixing part 1241 may also be disposed on the outer side of the first coil 121 in the third direction. In this case, the second yoke 126 is disposed on the inner side of the first coil 121 in the third direction, while the positions of the first connecting part 1242 and the first extension part 1243 remain unchanged. The positions of the second yoke 126, the first fixing part 1241, the first connecting part 1242 and the first extension part 1243 are not specifically limited.

[0077] Accordingly, in the third yoke 128, the second fixing part 1281, the second connecting part 1282, and the second extension part 1283 are perpendicular to each other. The second fixing part 1281 is disposed inside the second coil 122 in the third direction (thickness direction of the load switch 100), the second yoke 126 is disposed outside the second coil 122 in the third direction, and the second connecting part 1282 is disposed below the second coil 122 and extends along the second direction to connect the second fixing part 1281 and the second extension part 1283, and facilitates the second extension part 1283 to extend into the first end 131 of the armature assembly 130. However, this is not the only option. In other embodiments, the second fixing part 1281 may also be disposed on the outer side of the second coil 122 in the third direction. In this case, the second yoke 126 is disposed on the inner side of the second coil 122 in the third direction, while the positions of the second connecting part 1282 and the second extension part 1283 remain unchanged. The positions of the second yoke 126, the second fixing part 1281, the second connecting part 1282 and the second extension part 1283 are not specifically limited.

[0078] The beneficial effects of the load switch 100 provided in this embodiment are the same as those in the second embodiment, and will not be repeated here.

[0079] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A load switch, characterized in that, The device includes a housing (110), an electromagnetic system (170) disposed within the housing (110), a contact mechanism (150), and a terminal group (180) disposed outside the housing (110) and connected to the contact mechanism (150). The electromagnetic system (170), the contact mechanism (150), and the terminal group (180) are arranged sequentially along a first direction. The electromagnetic system (170) includes a magnetic circuit assembly (120), an armature assembly (130), and a transmission member (140). The magnetic circuit assembly (120) includes a magnetic yoke (123) and a coil module (129). The coil module (129) includes a first coil (121) and a second coil (122). The magnetic circuits generated by the first iron core (125) of the first coil (121) and the second iron core (127) of the second coil (122) are connected in series. The armature assembly (130) is used to drive the contact mechanism (150) to open and close the circuit through the transmission member (140) under the drive of the coil module (129).

2. The load switch according to claim 1, characterized in that, The coil module (129) and the armature assembly (130) are arranged sequentially along the first direction, and the first coil (121) and the second coil (122) are arranged sequentially along the second direction, which is perpendicular to the first direction.

3. The load switch according to claim 1, characterized in that, The first coil (121) and the second coil (122) are arranged sequentially along the first direction, and the coil module (129) and the armature assembly (130) are arranged sequentially along the second direction, which is perpendicular to the first direction.

4. The load switch according to claim 2 or 3, characterized in that, The axes of the first coil (121) and the second coil (122) are both along the second direction. One end of the armature assembly (130) is disposed adjacent to one end of the first iron core (125), and the other end of the armature assembly (130) is disposed adjacent to one end of the second iron core (127). When energized, the magnetic induction lines of the first coil (121) and the second coil (122) are in opposite directions. The first coil (121) and the second coil (122) are used to apply magnetic force to the armature assembly (130) when energized, so as to assist the movement of the armature assembly (130).

5. The load switch according to claim 2 or 3, characterized in that, The axial directions of the first coil (121) and the second coil (122) are both along the third direction. When energized, the magnetic induction lines of the first coil (121) and the second coil (122) are in opposite directions, and the second direction, the first direction and the third direction are perpendicular to each other.

6. The load switch according to claim 2 or 3, characterized in that, The armature assembly (130) includes a housing (133) and a first armature (134), a second armature (135) and a magnet mounted on the housing (133). The first armature (134) and the second armature (135) are disposed opposite to each other on both sides of the magnet. The housing (133) is rotatably disposed inside the outer shell (110) via a pivot (1331). The axis of the pivot (1331) is along a third direction, which is perpendicular to both the first direction and the second direction.

7. The load switch according to claim 1, characterized in that, The magnetic yoke (123) includes a first yoke (124), a second yoke (126), and a third yoke (128). The first yoke (124) is connected to one end of the first iron core (125), the third yoke (128) is connected to one end of the second iron core (127), and the other ends of the first iron core (125) and the second iron core (127) are both connected to the second yoke (126).

8. The load switch according to claim 7, characterized in that, The first yoke (124) includes a first fixing part (1241), a first connecting part (1242) and a first extension part (1243) connected in sequence. The first iron core (125) is connected between the second yoke (126) and the first fixing part (1241) and is perpendicular to the second yoke (126). The second yoke (126) and the first fixing part (1241) are arranged in parallel and spaced apart. The third yoke (128) includes a second fixing part (1281), a second connecting part (1282), and a second extension part (1283) connected in sequence. The second iron core (127) is connected between the second yoke (126) and the second fixing part (1281) and is perpendicular to the second yoke (126). The second yoke (126) and the second fixing part (1281) are arranged in parallel at intervals.

9. The load switch according to claim 8, characterized in that, The first fixing part (1241) and the first extension part (1243) are arranged in parallel and spaced apart, and both are perpendicular to the first connecting part (1242). The second yoke (126) is disposed between the first fixing part (1241) and the first extension part (1243). Alternatively, the first fixing part (1241), the first connecting part (1242), and the first extension part (1243) are perpendicular to each other; Alternatively, the first fixing part (1241) and the first connecting part (1242) are located on the same plane and are both perpendicular to the first extension part (1243).

10. The load switch according to claim 8, characterized in that, The second fixing part (1281) and the second extension part (1283) are arranged in parallel and spaced apart, and are both perpendicular to the second connecting part (1282). The second yoke (126) is disposed between the second fixing part (1281) and the second extension part (1283). Alternatively, the second fixing part (1281), the second connecting part (1282), and the second extension part (1283) are perpendicular to each other; Alternatively, the second fixing part (1281) and the second connecting part (1282) are located on the same plane and are both perpendicular to the second extension part (1283).

11. The load switch according to claim 1, characterized in that, The armature assembly (130) includes a limiting block (136) and an elastic member (137). The limiting block (136) has a sliding groove (1361). One end of the transmission member (140) is inserted into the sliding groove (1361) and cooperates with the sliding groove (1361). The other end is connected to the moving contact unit (151) of the contact mechanism (150). One end of the elastic member (137) abuts against the armature assembly (130), and the other end abuts against the transmission member (140).

12. The load switch according to claim 1, characterized in that, The contact mechanism (150) includes a moving contact unit (151) and a stationary contact unit (152). The moving contact unit (151) and the stationary contact unit (152) are arranged sequentially along the first direction. The moving contact unit (151) is connected to the transmission member (140). One end of the moving contact unit (151) can swing around the other end under the drive of the transmission member (140) to open and close with the stationary contact unit (152).

13. The load switch according to claim 1, characterized in that, The load switch further includes an arc extinguishing mechanism (160), which is disposed inside the housing (110). The arc extinguishing mechanism (160) and the contact mechanism (150) are arranged along a second direction, which is perpendicular to the first direction.

14. The load switch according to claim 1, characterized in that, The terminal group (180) includes a first terminal (181) and a second terminal (182). The first terminal (181) and the second terminal (182) are located on the same side of the housing (110) and both extend along the first direction and are connected to the contact mechanism (150).

15. An electricity meter, characterized in that, Includes a load switch as described in any one of claims 1-14, wherein the coil module (129) is located in the middle of the meter.

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