Load switch and ammeter

Abstract

A load switch and an ammeter relate to the technical field of low-voltage apparatuses. The load switch comprises a shell and a magnetic circuit assembly, an armature assembly, a transmission piece and a contact mechanism which are arranged in the shell, the magnetic circuit assembly comprises a coil and a yoke which are connected, the axis direction of the coil is arranged in the first direction, and the coil and the armature assembly are sequentially arranged in the second direction perpendicular to the first direction; the armature assembly and the contact mechanism are arranged on the two opposite sides of the transmission part in the second direction respectively. The contact mechanism comprises a moving contact piece and a static contact piece which are oppositely arranged in the second direction, the relative positions of the first end of the moving contact piece and the static contact piece are fixed, the second end of the moving contact piece can move relative to the static contact piece, the armature assembly is connected with the moving contact piece through a transmission piece, and the magnetic circuit assembly is used for driving the armature assembly to move. And the moving contact piece and the static contact piece are driven to be switched on and switched off through the transmission piece. According to the load switch, the internal space of the shell is effectively utilized, and the assembling process is more convenient.

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] A load switch typically includes components such as a moving spring, a moving contact, a moving magnet, a stationary spring, a stationary contact, and a stationary magnet. When the moving and stationary contacts are connected, a magnetic attraction force is generated between the moving and stationary magnets, which acts on the moving spring, thus helping to maintain the closed state of the moving and stationary contacts.

[0003] To provide a larger contact gap, existing load switches typically employ a layout where the armature assembly, rotating parts, and contact system are arranged in different directions. This layout results in larger dimensions along the arrangement direction and complex assembly. Without adjusting the layout or structure of other components within the meter or other electrical appliance, it is difficult to use this type of load switch. Therefore, there is an urgent need for a load switch product with a more rational layout, smaller assembly space requirements, and better applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a load switch and meter that can solve the problems of large assembly space occupation, poor applicability and complicated assembly of existing load switches due to unreasonable layout.

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

[0006] In one aspect, this utility model provides a load switch, including a housing and a magnetic circuit assembly, an armature assembly, a transmission component, and a contact mechanism disposed within the housing. The magnetic circuit assembly includes a coil and a yoke connected to each other. The axial direction of the coil is arranged along a first direction, and the coil and the armature assembly are arranged sequentially along a second direction perpendicular to the first direction. The armature assembly and the contact mechanism are respectively arranged on opposite sides of the transmission component along the second direction. The contact mechanism includes a moving contact piece and a stationary contact piece arranged opposite to each other along the second direction. The first end of the moving contact piece is fixed relative to the stationary contact piece, and the second end of the moving contact piece is movable relative to the stationary contact piece. The armature assembly is connected to the moving contact piece through the transmission component. The magnetic circuit assembly is used to drive the armature assembly to move and to drive the moving contact piece and the stationary contact piece to open and close the circuit through the transmission component.

[0007] Optionally, the yoke includes a first yoke portion and a second yoke portion, which are respectively connected to opposite ends of the coil along a first direction; the armature assembly is rotatably disposed between the first yoke portion and the second yoke portion; the first yoke portion and the second yoke portion are symmetrically distributed about the rotation axis of the armature assembly.

[0008] Optionally, the yoke includes a first yoke portion and a second yoke portion, which are respectively connected to opposite ends of the coil along a first direction; the armature assembly is rotatably disposed between the first yoke portion and the second yoke portion; the first yoke portion and the second yoke portion are asymmetrically distributed about the rotation axis of the armature assembly.

[0009] Optionally, a connector is provided on the moving contact piece, one end of the transmission member is connected to the armature assembly, and the other end is connected to the connector; the connector is provided at the second end of the moving contact piece or at the second end adjacent to the moving contact piece; the connector is located on the side of the moving contact piece facing the armature assembly, or the connector is located on the side of the moving contact piece away from the armature assembly.

[0010] Optionally, the armature assembly includes a rotating shaft, a rotating part and an extension connected to each other. The rotating part is disposed on the side close to the magnetic circuit assembly and is rotatably disposed in the housing via the rotating shaft. The rotating shaft is disposed along a third direction, which is perpendicular to the first direction and the second direction respectively. The extension extends toward the side away from the magnetic circuit assembly. The connecting member is a connecting lug, one end of the transmission member is movably connected to the armature assembly and the other end is hinged to the connecting lug.

[0011] Optionally, the load switch also includes an arc-extinguishing assembly disposed within the housing, the arc-extinguishing assembly being arranged along a first direction on one side of the contact mechanism.

[0012] Optionally, the load switch also includes an arc-extinguishing assembly disposed within the housing. The arc-extinguishing assembly is arranged along a third direction on one side of the contact mechanism, and the third direction is perpendicular to the first direction and the second direction, respectively.

[0013] Optionally, the stationary contact piece is located on the side of the moving contact piece facing the armature assembly, or the stationary contact piece is located on the side of the moving contact piece facing away from the armature assembly.

[0014] Optionally, the contact mechanism further includes a moving contact lead-out piece connected to the moving contact piece and a stationary contact lead-out piece connected to the stationary contact piece; the moving contact lead-out piece includes a first segment, a second segment, and a third segment connected in sequence, the first segment and the third segment being connected to opposite sides of the second segment and extending along a first direction; when the circuit is closed, at least a portion of the moving contact piece is located between the first segment and the third segment along a second direction, and the current flow direction through the first segment is opposite to the current flow direction through the third segment.

[0015] Optionally, the load switch further includes a first terminal and a second terminal, which are respectively disposed outside the housing and located on the same side of the housing; the first terminal is used to connect with the moving contact lead-out piece, and the second terminal is used to connect with the stationary contact lead-out piece.

[0016] Optionally, the contact mechanism further includes a magnetizing block, which is arranged sequentially with the moving contact piece in the housing along a third direction to enhance the contact pressure between the moving contact piece and the stationary contact piece; the third direction is perpendicular to the first direction and the second direction respectively.

[0017] In another aspect, this utility model provides an electricity meter, which includes a casing and the aforementioned load switch is disposed inside the casing.

[0018] The beneficial effects of this utility model include:

[0019] This application provides a load switch, including a housing and a magnetic circuit assembly, an armature assembly, a transmission component, and a contact mechanism disposed within the housing. The magnetic circuit assembly includes a coil and a yoke connected to each other. The axial direction of the coil is arranged along a first direction, and the coil and the armature assembly are arranged sequentially along a second direction perpendicular to the first direction. The armature assembly and the contact mechanism are respectively arranged on opposite sides of the transmission component along the second direction. The contact mechanism includes a moving contact piece and a stationary contact piece arranged opposite to each other along the second direction. The first end of the moving contact piece is fixed relative to the stationary contact piece, and the second end of the moving contact piece is movable relative to the stationary contact piece. The armature assembly is connected to the moving contact piece through the transmission component. The magnetic circuit assembly is used to drive the armature assembly to move and to drive the moving contact piece and the stationary contact piece to open and close the circuit through the transmission component. The load switch provided in this application, through the rational arrangement of the positional relationships of the magnetic circuit assembly, armature assembly, transmission component, and contact mechanism, is laid out along two mutually perpendicular directions. This allows all components to be arranged sequentially in the same direction in space. Compared to the existing layout method where components are arranged in different directions, the layout method provided in this application effectively utilizes the internal space of the housing and facilitates the assembly process. The compact layout of the various components inside the load switch enables the load switch product provided in this application to be used in different application scenarios, thereby meeting the needs of more users. Attached Figure Description

[0020] 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.

[0021] Figure 1 One of the structural schematic diagrams of the load switch provided in the embodiment of this utility model;

[0022] Figure 2 A second schematic diagram of the structure of the load switch provided in this embodiment of the utility model;

[0023] Figure 3The third schematic diagram of the load switch provided in this embodiment of the utility model;

[0024] Figure 4 Fourth schematic diagram of the load switch provided in the embodiment of this utility model;

[0025] Figure 5 Fifth schematic diagram of the structure of the load switch provided in the embodiment of this utility model;

[0026] Figure 6 The sixth schematic diagram of the load switch provided in the embodiment of this utility model.

[0027] Icons: 100-Load switch; 10-Housing; 20-Magnetic circuit assembly; 21-Coil; 22-Yoke; 221-First yoke section; 222-Second yoke section; 30-Armature assembly; 31-Rotating part; 32-Extension section; 33-Shaft; 40-Transmission component; 50-Contact mechanism; 511-Moving contact piece; 5111-Connecting lug; 521-Stationary contact piece; 531-Magnetic block; 61-Moving contact lead-out piece; 611-First section; 612-Second section; 613-Third section; 62-Stationary contact lead-out piece; 70-Arc extinguishing assembly; 71-Arc extinguishing chamber; 72-Arc extinguishing grid; 81-First terminal; 82-Second terminal; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0028] 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.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 product of this utility model 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," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0032] Please refer to Figure 1 , Figure 3 and Figure 5 This embodiment provides a load switch 100, including a housing 10 and a magnetic circuit assembly 20, an armature assembly 30, a transmission member 40, and a contact mechanism 50 disposed within the housing 10. The magnetic circuit assembly 20 includes a coil 21 and a yoke 22 connected to each other. The axial direction of the coil 21 is arranged along a first direction X. The coil 21 and the armature assembly 30 are arranged sequentially along a second direction Y perpendicular to the first direction X. The armature assembly 30 and the contact mechanism 50 are respectively arranged along the second direction Y on the transmission member 40. On opposite sides; the contact mechanism 50 includes a moving contact piece 511 and a stationary contact piece 521 arranged opposite each other along the second direction Y. The first end of the moving contact piece 511 is fixed relative to the stationary contact piece 521, and the second end of the moving contact piece 511 is movable relative to the stationary contact piece 521. The armature assembly 30 is connected to the moving contact piece 511 through the transmission member 40. The magnetic circuit assembly 20 is used to drive the armature assembly 30 to move, and drives the moving contact piece 511 and the stationary contact piece 521 to open and close the circuit through the transmission member 40.

[0033] Specifically, such as Figure 1 , Figure 3 and Figure 5 As shown, the load switch 100 includes a housing 10 and a magnetic circuit assembly 20, an armature assembly 30, a transmission member 40, and a contact mechanism 50 disposed within the housing 10. The magnetic circuit assembly 20 includes a coil 21 and a yoke 22 connected to each other. The axial direction of the coil 21 is arranged along a first direction X, which is the width direction of the housing 10. The yoke 22 includes a first yoke portion 221 and a second yoke portion 222, which are respectively disposed at opposite ends of the coil 21.

[0034] like Figure 2As shown, the first yoke portion 221 and the second yoke portion 222 are bent, with one side connected to the end face of the coil 21 and the other end extending along the second direction Y to a preset angle before being bent, so that the first yoke portion 221 and the second yoke portion 222 are arranged relatively spaced apart. The armature assembly 30 is disposed in the gap between the first yoke portion 221 and the second yoke portion 222, so that the armature assembly 30 and the coil 21 are arranged sequentially along the second direction Y. Wherein, the second direction Y is the length direction of the housing 10. Therefore, after the coil 21 is energized, the magnetic field generated by the magnetic circuit assembly 20 can act on the armature assembly 30 through the first yoke portion 221 and the second yoke portion 222, and drive the armature assembly 30 to move.

[0035] like Figure 1 As shown, the contact mechanism 50 includes a moving contact piece 511 and a stationary contact piece 521 arranged opposite to each other along the second direction Y. The first end of the moving contact piece 511 is fixed in position relative to the stationary contact piece 521, meaning there is no relative movement between the first end of the moving contact piece 511 and the stationary contact piece 521. The second end of the moving contact piece 511 is movable relative to the stationary contact piece 521, allowing the second end of the moving contact piece 511 to rotate around its first end, thereby realizing the opening and closing of the circuit with the stationary contact piece 521. The first direction X and the second direction Y are perpendicular to each other.

[0036] A transmission component 40 is also provided between the contact mechanism 50 and the armature assembly 30. The two ends of the transmission component 40 are respectively connected to the moving contact piece 511 of the contact mechanism 50 and the armature assembly 30. When the magnetic circuit assembly 20 drives the armature assembly 30 to move, since the armature assembly 30 is connected to the moving contact piece 511 through the transmission component 40, the moving contact piece 511 can be driven to move through the transmission component 40 when the armature assembly 30 moves, thereby realizing the opening and closing operation with the stationary contact piece 521.

[0037] The load switch 100 also includes a moving contact lead-out piece 61 and a stationary contact lead-out piece 62. One end of the moving contact lead-out piece 61 is connected to the moving contact piece 511, and the other end extends out of the housing 10 along the second direction Y. One end of the stationary contact lead-out piece 62 is connected to the stationary contact piece 521, and the other end extends out of the housing 10 along the second direction Y, so as to connect to the power circuit through the moving contact lead-out piece 61 and the stationary contact lead-out piece 62.

[0038] It should be noted that, in one possible implementation of this application, firstly, the load switch 100 further includes an arc-extinguishing component 70 disposed within the housing 10, the arc-extinguishing component 70 being arranged along the first direction X on one side of the contact mechanism 50; and / or, arranged along the third direction Z on one side of the contact mechanism 50, the third direction Z being perpendicular to the first direction X and the second direction Y respectively.

[0039] Specifically, such as Figure 1 and Figure 2As shown, the arc-extinguishing assembly 70 includes an arc-extinguishing chamber 71 and arc-extinguishing grid plates 72 inserted on the two side plates of the arc-extinguishing chamber 71, used to extinguish the generated arc when the moving contact plate 511 and the stationary contact plate 521 are opened. In one specific embodiment of this application, as shown... Figure 1 and Figure 2 As shown, the opening of the arc-extinguishing chamber 71 is arranged along the third direction Z toward the contact mechanism 50, wherein the third direction Z is the thickness direction of the housing 10, making full use of the space of the load switch in the third direction Z; in another embodiment, as Figure 3 and Figure 4 As shown, the arc-extinguishing grid plate 72 extends along the first direction X, so that the arc generated when the moving contact plate 511 and the stationary contact plate 521 are opened can be extinguished by entering the arc-extinguishing chamber 71 through the opening of the arc-extinguishing chamber 71 under the guidance of the arc-extinguishing grid plate 72. Of course, in other embodiments, in order to further improve the arc-extinguishing performance, arc-extinguishing components 70 can also be provided on both the third direction Z and the first direction X side of the contact mechanism 50.

[0040] Of course, in addition to the above-described configuration, another possible implementation of this application is as follows: Figure 3 and Figure 5 The opening of the arc-extinguishing chamber 71 shown is provided along the first direction X toward the contact mechanism 50, and the arc-extinguishing grid plate 72 extends along the third direction Z.

[0041] Second, such as Figure 1 As shown, the stationary contact piece 521 is located on the side of the moving contact piece 511 facing the armature assembly 30, such that the second end of the moving contact piece 511 rotates towards the direction closer to the armature assembly 30 to contact the stationary contact piece 521 for closing. At this time, the stationary contact lead-out piece 62 extends along the second direction Y to connect with the stationary contact piece 521. The stationary contact lead-out piece 62 can further enhance the short-time withstand capability of the load switch; or, as Figure 3 and Figure 4 As shown, the stationary contact piece 521 is located on the side of the moving contact piece 511 away from the armature assembly 30, so that the second end of the moving contact piece 511 rotates in the direction away from the armature assembly 30 to make contact with the stationary contact piece 521 to close the circuit. This application does not impose any restrictions on the specific arrangement of the moving contact piece 511 and the stationary contact piece 521, as long as a good contact connection can be achieved.

[0042] The load switch 100 provided in this application, by rationally arranging the positional relationship of the magnetic circuit assembly 20, armature assembly 30, transmission component 40, and contact mechanism 50 along two mutually perpendicular directions, allows each component to be arranged sequentially in the same direction in space. Compared with the existing layout method of arranging components in different directions, the layout method provided in this application effectively utilizes the internal space of the housing 10, and the assembly process is more convenient. Through the compact layout of the various components inside the load switch 100, the load switch 100 product provided in this application can be used in different application scenarios, thereby meeting the needs of more users.

[0043] In one possible embodiment of this application, the yoke 22 includes a first yoke portion 221 and a second yoke portion 222, which are respectively connected to the opposite ends of the coil 21 along a first direction X; the armature assembly 30 is rotatably disposed between the first yoke portion 221 and the second yoke portion 222; the first yoke portion 221 and the second yoke portion 222 are symmetrically distributed about the rotation axis of the armature assembly 30.

[0044] Specifically, such as Figure 2 As shown, the armature assembly 30 is rotatably disposed between the first yoke part 221 and the second yoke part 222. The first yoke part 221 and the second yoke part 222 have the same shape and structure, the same distance from the contact mechanism 50, and the same distance from the armature assembly 30. That is, the first yoke part 221 and the second yoke part 222 are symmetrically distributed with the rotation axis of the armature assembly 30 as the axis of symmetry.

[0045] This configuration facilitates the assembly of the magnetic circuit assembly 20 and reduces the production cost of the load switch 100. Furthermore, the symmetrical distribution of the first yoke 221 and the second yoke 222 makes the magnetic field generated by the coil 21 more uniformly and symmetrically distributed around the armature assembly 30, thereby improving the consistency and stability of the force exerted by the magnetic field on the armature assembly 30, enabling the armature assembly 30 to move more accurately and smoothly.

[0046] Of course, in addition to the above-mentioned arrangement in which the first yoke portion 221 and the second yoke portion 222 are symmetrically distributed with the rotation axis of the armature assembly 30 as the axis of symmetry, the first yoke portion 221 and the second yoke portion 222 can also be asymmetrically distributed with the rotation axis of the armature assembly 30 as the axis of symmetry to make greater use of the internal space of the load switch.

[0047] Specifically, such as Figure 4 and Figure 6 As shown, the first yoke portion 221 and the second yoke portion 222 can have different shapes and structures, unequal distances from the contact mechanism 50, and unequal distances from the armature assembly 30. For example, as... Figure 6 As shown, the bent portions of the first yoke 221 and the second yoke 222 are both inclined, and the first yoke 221 is farther away from the contact mechanism 50, so as to ensure the large opening distance requirement of the contact mechanism 50 in a limited space, and thus make the overall layout of the armature assembly 30 closer to the second yoke 222.

[0048] By using an asymmetrical distribution, the layout of other components inside the load switch 100 can be flexibly adjusted to better adapt to different structural design requirements, effectively utilize limited space, make the overall structure more compact, and improve the spatial flexibility of the load switch 100 during assembly.

[0049] For example, the moving contact piece 511 is provided with a connector, one end of the transmission member 40 is connected to the armature assembly 30, and the other end is connected to the connector. The moving contact piece 511 and the connector can be manufactured separately and then fixed together, or they can be manufactured directly by integral molding.

[0050] For example, such as Figure 1 and Figure 2 As shown, the armature assembly 30 includes a rotating shaft 33, a rotating part 31 and an extension part 32 connected to each other. The rotating part 31 is disposed on the side close to the magnetic circuit assembly 20 and is rotatably disposed in the housing 10 via the rotating shaft 33. The rotating shaft 33 is disposed along a third direction Z, which is perpendicular to the first direction X and the second direction Y respectively. The extension part 32 extends toward the side away from the magnetic circuit assembly 20. The connecting member is a connecting lug 5111. One end of the transmission member 40 is movably connected to the armature assembly 30 and the other end is hinged to the connecting lug 5111.

[0051] Specifically, such as Figure 1 and Figure 2 As shown, the armature assembly 30 is formed by interconnecting a rotating shaft 33, a rotating part 31, and an extension part 32. The rotating part 31 is located on the side closer to the magnetic circuit assembly 20 and is rotatably disposed within the housing 10 via the rotating shaft 33. Therefore, the rotating part 31 can rotate along the rotating shaft under the influence of a magnetic field. The extension part 32 extends away from the magnetic circuit assembly 20, and its function is to transmit the movement of the rotating part 31 to other components.

[0052] The extension 32 is provided with a connecting hole for the transmission member 40 to pass through. One end of the transmission member 40 is movably connected to the connecting hole, meaning that one end of the transmission member 40 can be rotatably disposed within the connecting hole and can move within the connecting hole to avoid jamming during the driving of the moving contact piece 511, while also providing contact overtravel for the moving contact piece 511. The other end of the transmission member 40 is hinged to a connecting member, which can be a connecting lug 5111. This structural design allows for a more flexible layout of the various components inside the load switch 100, enabling coordinated operation between different components within a larger space, which is beneficial for optimizing the internal spatial layout of the load switch 100 and improving space utilization.

[0053] Optionally, such as Figure 2 and Figure 6 As shown, the connector is disposed at the second end of the moving contact piece 511 or adjacent to the second end of the moving contact piece 511, which can greatly improve the transmission efficiency; the connector is located on the side of the moving contact piece 511 facing the armature assembly 30, or, as shown... Figure 4 As shown, the connector is located on the side of the moving contact piece 511 that faces away from the armature assembly 30.

[0054] Specifically, the connector can be located on the side of the moving contact 511 facing the armature assembly 30, and the transmission member 40 can be directly connected to the top of the moving contact 511, making the transmission path from the armature assembly 30 to the moving contact 511 shorter. This helps reduce energy loss during transmission, improves transmission efficiency, and enables the moving contact 511 to respond more quickly and accurately to the movement of the armature assembly 30, achieving more agile opening and closing operations. Of course, under certain layout constraints, the connector can also be located on the side of the moving contact 511 away from the armature assembly 30, and the transmission member 40 can extend to and connect to the bottom surface of the moving contact 511, making the layout of the load switch 100 more flexible.

[0055] In one possible implementation of this application, such as Figure 1 and Figure 4As shown, the contact mechanism 50 also includes a moving contact lead-out piece 61 connected to the moving contact piece 511 and a stationary contact lead-out piece 62 connected to the stationary contact piece 521; the moving contact lead-out piece 61 includes a first segment 611, a second segment 612, and a third segment 613 connected in sequence, the first segment 611 and the third segment 613 being respectively connected to opposite sides of the second segment 612 and extending along the first direction X; when closing, at least a portion of the moving contact piece 511 is located between the first segment 611 and the third segment 613 along the second direction Y. Between 3, the current flow direction through the first segment 611 is opposite to the current flow direction through the third segment 613. This causes the magnetic field generated by the current through these two segments to exert a force on the moving contact piece 511 towards the stationary contact piece 521, thereby preventing the moving contact piece 511 and the stationary contact piece 521 from being separated by repulsion in the event of abnormal conditions such as short circuits. This ensures stable contact between the moving contact piece 511 and the stationary contact piece 521, improves the operational stability of the contact mechanism 50 and its ability to withstand short-circuit currents.

[0056] In one specific embodiment of this application, such as Figure 1 As shown, the second segment 612 extends along the second direction Y, and the first segment 611 is connected to the first end of the moving contact piece 511 through a flexible component. Since the stationary contact piece 521 is located above the moving contact piece 511, when the circuit is closed, the current flow through the moving contact piece 511 is opposite to the current flow through the first segment 611 and the same as the current flow through the third segment 613. This causes the moving contact piece 511 to generate a mutual attraction force with the first segment 611 and a repulsive force with the third segment 613, so as to ensure stable contact between the moving contact piece 511 and the stationary contact piece 521.

[0057] In another specific embodiment of this application, such as Figure 4 As shown, the second segment 612 extends along the second direction Y, and the first segment 611 is connected to the first end of the moving contact piece 511 through a flexible component. Since the stationary contact piece 521 is located below the moving contact piece 511, when the circuit is closed, the current flow direction through the moving contact piece 511 is the same as the current flow direction through the first segment 611, and opposite to the current flow direction through the third segment 613. This causes a repulsive force to be generated between the moving contact piece 511 and the first segment 611, and an attractive force to be generated between the moving contact piece 511 and the third segment 613, so as to ensure stable contact between the moving contact piece 511 and the stationary contact piece 521.

[0058] Furthermore, when the arc extinguishing component 70 is disposed on one side of the contact mechanism 50 along the third direction Z, the second segment 612 and the arc extinguishing component 70 are disposed on both sides of the contact mechanism 50. The second segment 612 can help to introduce the arc into the arc extinguishing component 70 and improve the arc extinguishing performance of the load switch.

[0059] It should also be noted that the current flow direction of the two mentioned in this embodiment is the same or opposite, which means that the two current flow directions are roughly parallel. That is, the current flow direction of the two can refer to a parallel relationship, or it can refer to that they have a component along the length extension direction of the moving contact piece 511. In this case, the current flow direction of the two can be set at an angle.

[0060] For example, such as Figure 1 As shown, the load switch 100 also includes a first terminal 81 and a second terminal 82, which are respectively disposed outside the housing 10 and located on the same side of the housing 10. The first terminal 81 is used to connect with the moving contact lead-out piece 61, and the second terminal 82 is used to connect with the stationary contact lead-out piece 62. The arrangement of the first terminal 81 and the second terminal 82 provides a stable and convenient external electrical connection for the load switch 100. This same-side arrangement greatly optimizes the installation space, makes wiring more compact and reasonable, effectively avoids wire crossing and tangling, reduces the risk of short circuits and other faults caused by messy wiring, and improves the reliability of the entire power system.

[0061] In one possible implementation of this application, such as Figure 1 , Figure 3 and Figure 5 As shown, the contact mechanism 50 also includes a magnetizing block 531, which is arranged sequentially with the moving contact piece 511 along the third direction Z in the housing 10 to enhance the contact pressure between the moving contact piece 511 and the stationary contact piece 521; the third direction Z is perpendicular to the first direction X and the second direction Y respectively.

[0062] Specifically, the number of magnetizing blocks 531 is at least one. When there is only one magnetizing block 531, it is located between the first segment 611 and the third segment 613 of the moving contact lead-out piece 61. When there are multiple magnetizing blocks 531, they can be stacked in a third direction Z between the first segment 611 and the third segment 613 of the moving contact lead-out piece 61, or they can be arranged sequentially in a first direction X between the first segment 611 and the third segment 613 of the moving contact lead-out piece 61. During the operation of the load switch, a magnetic field is generated when current passes through the moving contact piece 511 and the stationary contact piece 521. The magnetizing blocks 531 can effectively concentrate and enhance this magnetic field, resulting in a stronger electromagnetic attraction between the moving contact piece 511 and the stationary contact piece 521, ensuring that the moving contact piece 511 and the stationary contact piece 521 can fit tightly together under various operating conditions.

[0063] Furthermore, the projection of the magnetizing block 531 along the third direction Z at least simultaneously overlaps with the projections of the moving contact piece 511 and the first segment 611 along the third direction Z, thereby reducing the magnetic resistance between the moving contact piece 511 and the first segment 611 and further improving the contact force between the moving contact piece 511 and the stationary contact piece 521. In another aspect of this application, an electricity meter is provided, which includes a meter housing, and the aforementioned load switch 100 is disposed inside the meter housing. 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.

[0064] The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0065] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A load switch, characterized in that, The device includes a housing (10) and a magnetic circuit assembly (20), an armature assembly (30), a transmission member (40), and a contact mechanism (50) disposed within the housing (10). The magnetic circuit assembly (20) includes a coil (21) and a yoke (22) connected to each other. The axial direction of the coil (21) is arranged along a first direction (X). The coil (21) and the armature assembly (30) are arranged sequentially along a second direction (Y) perpendicular to the first direction (X). The armature assembly (30) and the contact mechanism (50) are respectively arranged on opposite sides of the transmission member (40) along the second direction (Y). The structure (50) includes a moving contact piece (511) and a stationary contact piece (521) arranged opposite to each other along the second direction (Y). The first end of the moving contact piece (511) is fixed relative to the stationary contact piece (521), and the second end of the moving contact piece (511) is movable relative to the stationary contact piece (521). The armature assembly (30) is connected to the moving contact piece (511) through the transmission member (40). The magnetic circuit assembly (20) is used to drive the armature assembly (30) to move and drive the moving contact piece (511) and the stationary contact piece (521) to open and close the circuit through the transmission member (40).

2. The load switch according to claim 1, characterized in that, The yoke (22) includes a first yoke portion (221) and a second yoke portion (222), which are respectively connected to the opposite ends of the coil (21) along the first direction (X); the armature assembly (30) is rotatably disposed between the first yoke portion (221) and the second yoke portion (222); the first yoke portion (221) and the second yoke portion (222) are symmetrically distributed about the rotation axis of the armature assembly (30); or, the first yoke portion (221) and the second yoke portion (222) are asymmetrically distributed about the rotation axis of the armature assembly (30).

3. The load switch according to claim 1, characterized in that, A connector is provided on the moving contact piece (511). One end of the transmission member (40) is connected to the armature assembly (30), and the other end is connected to the connector. The connector is located at the second end of the moving contact piece (511) or adjacent to the second end of the moving contact piece (511). The connector is located on the side of the moving contact piece (511) facing the armature assembly (30), or the connector is located on the side of the moving contact piece (511) away from the armature assembly (30).

4. The load switch according to claim 3, characterized in that, The armature assembly (30) includes a rotating shaft (33), a rotating part (31) and an extension part (32) connected to each other. The rotating part (31) is disposed on the side close to the magnetic circuit assembly (20) and is rotatably disposed in the housing (10) via the rotating shaft (33). The rotating shaft (33) is disposed along a third direction (Z), which is perpendicular to the first direction (X) and the second direction (Y) respectively. The extension part (32) extends toward the side away from the magnetic circuit assembly (20). The connecting member is a connecting lug (5111). One end of the transmission member (40) is movably connected to the armature assembly (30), and the other end is hinged to the connecting lug (5111).

5. The load switch according to claim 1, characterized in that, The load switch (100) further includes an arc-extinguishing component (70) disposed within the housing (10). The arc-extinguishing component (70) is arranged along the first direction (X) on one side of the contact mechanism (50), and / or, the arc-extinguishing component (70) is arranged along a third direction (Z) on one side of the contact mechanism (50), the third direction (Z) being perpendicular to the first direction (X) and the second direction (Y) respectively.

6. The load switch according to claim 1, characterized in that, The stationary contact piece (521) is located on the side of the moving contact piece (511) facing the armature assembly (30), or the stationary contact piece (521) is located on the side of the moving contact piece (511) away from the armature assembly (30).

7. The load switch according to claim 1, characterized in that, The contact mechanism (50) further includes a moving contact lead-out piece (61) connected to the moving contact piece (511) and a stationary contact lead-out piece (62) connected to the stationary contact piece (521); the moving contact lead-out piece (61) includes a first segment (611), a second segment (612) and a third segment (613) connected in sequence, the first segment (611) and the third segment (613) are respectively connected to opposite sides of the second segment (612) and extend along the first direction (X); when the circuit is closed, at least a portion of the moving contact piece (511) is located between the first segment (611) and the third segment (613) along the second direction (Y), and the current flow direction through the first segment (611) is opposite to the current flow direction through the third segment (613).

8. The load switch according to claim 7, characterized in that, The load switch (100) further includes a first terminal (81) and a second terminal (82), the first terminal (81) and the second terminal (82) are respectively disposed outside the housing (10) and located on the same side of the housing (10); the first terminal (81) is used to connect with the moving contact lead-out piece (61), and the second terminal (82) is used to connect with the stationary contact lead-out piece (62).

9. The load switch according to claim 1, characterized in that, The contact mechanism (50) further includes a magnetizing block (531), which is arranged sequentially with the moving contact piece (511) along a third direction (Z) inside the housing (10) to enhance the contact pressure between the moving contact piece (511) and the stationary contact piece (521); the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y) respectively.

10. An electricity meter, characterized in that, Includes a watch case, within which a load switch (100) as described in any one of claims 1-9 is provided.

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