A load switch and a meter

Abstract

The application relates to the technical field of low-voltage electrical apparatus, and particularly relates to a load switch and an electric meter, which comprise a mounting shell, an electromagnetic driving mechanism, a contact assembly, an arc extinguishing piece and a wiring panel group; the electromagnetic driving mechanism and the contact assembly are arranged in a first direction and close to each other in the mounting shell; the arc extinguishing piece and the contact assembly are arranged in a second direction, and the first direction is perpendicular to the second direction; the wiring panel group is located on the side of the contact assembly which is away from the electromagnetic driving mechanism; the electromagnetic driving mechanism comprises an electromagnetic coil, a yoke assembly and a rotating armature assembly; the electromagnetic coil is electrified to drive the rotating armature assembly to drive the contact assembly to open or close. According to the improved structure and layout of the load switch, the volume of the load switch can be effectively reduced, and the miniaturized design of the load switch can be realized.

Description

[0001] Cross-references to related applications

[0002] This application is a divisional application of Chinese patent application No. 2024231208819, filed on December 17, 2024, entitled "A load switch and an electricity meter". Technical Field

[0003] This application relates to the field of low-voltage electrical technology, and more specifically, to a load switch and an electricity meter. Background Technology

[0004] A load switch can interrupt the rated load current and a certain overload current. It achieves closing or opening of the circuit through the contact or separation of its internal moving and stationary contacts. The electricity meter contains a PCB board for data exchange with external devices. Furthermore, to ensure accurate and stable energy measurement, the meter typically requires numerous components such as transformers, MCUs, and capacitors, significantly limiting the space available for the load switch. Therefore, load switches are increasingly being miniaturized. In existing technologies, on the one hand, complex transmission structures such as push-locks or gear drives are used to move the moving contacts, requiring considerable assembly space. On the other hand, the overall structural layout of existing load switches is not compact enough, resulting in a large overall size. This leads to a significant space requirement when the load switch is installed inside the electricity meter, hindering miniaturization design. Utility Model Content

[0005] The purpose of this application is to provide a load switch and an electricity meter, which can effectively reduce the size of the load switch by improving the structural layout of the load switch, thus facilitating the miniaturization design of the load switch.

[0006] The embodiments of this application are implemented as follows:

[0007] This application provides a load switch, including a mounting housing, an electromagnetic drive mechanism, a contact assembly, an arc-extinguishing element, and a terminal block assembly. The electromagnetic drive mechanism and the contact assembly are arranged close to each other along a first direction within the mounting housing. The arc-extinguishing element and the contact assembly are arranged along a second direction, with the first direction perpendicular to the second direction. The terminal block assembly is used to connect to the contact assembly, extends at least partially outside the mounting housing, and is located on the side of the contact assembly away from the electromagnetic drive mechanism. The electromagnetic drive mechanism includes an electromagnetic coil, a yoke assembly, and a rotating armature assembly. When the electromagnetic coil is energized, the rotating armature assembly drives the contact assembly to open or close the switch.

[0008] As an optional implementation, the contact assembly includes a rotating shaft, a moving contact, and a stationary contact; the moving contact has a moving contact portion for closing / opening with the stationary contact; under the drive of the electromagnetic drive mechanism, the moving contact portion moves around the rotating shaft to approach or move away from the stationary contact to achieve opening or closing.

[0009] As an optional implementation, the mounting housing is provided with a U-shaped magnetizing element; the U-shaped magnetizing element is located on the side of the moving contact away from the stationary contact, and the moving contact passes through the opening of the U-shaped magnetizing element.

[0010] As an optional implementation, the terminal block group includes a first terminal block and a second terminal block. Both the first terminal block and the second terminal block include a connecting segment and a wiring segment connected in sequence. Each connecting segment is provided with a sampling pin, and the sampling pin extends along a third direction, which is perpendicular to both the first direction and the second direction.

[0011] As an alternative implementation, the connecting section of the second terminal block is U-shaped, and its opening faces away from the side of the first terminal block.

[0012] As an optional implementation, a flexible connecting wire is provided on the first terminal block, and the end of the moving contact away from the moving contact portion is connected to the flexible connecting wire.

[0013] As an optional implementation, the electromagnetic coil has a coil pin on the side near the contact assembly, one end of which extends along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0014] As an optional implementation, the electromagnetic drive mechanism further includes a yoke assembly disposed on the electromagnetic coil; the yoke assembly includes a first yoke and a second yoke arranged along a first direction, the axis of the electromagnetic coil is along the first direction, and the rotating armature assembly is arranged with the electromagnetic coil along a second direction.

[0015] As an optional implementation, the contact assembly further includes a moving contact mounting base, with a plurality of moving contacts connected to the moving contact mounting base, and the plurality of moving contacts arranged along a third direction; wherein, the first direction, the second direction, and the third direction are perpendicular to each other; a connecting rod structure is provided between the rotating armature assembly and the moving contact mounting base; a connecting part is provided on the rotating armature assembly, one end of the connecting rod structure is connected to the connecting part, and the other end is engaged with a second mounting hole on the moving contact mounting base, and the engagement position of the two is located on the side of the moving contact away from the stationary contact.

[0016] As an optional implementation, an elastic element is provided between the moving contact mounting base and the moving contact, and the elastic element is compressed to generate a force that causes the moving contact to move closer to the stationary contact.

[0017] As an optional implementation, the mounting housing is provided with a magnetic shield arranged circumferentially around the electromagnetic drive mechanism; the magnetic shield is located on the side of the coil pin opposite to the terminal block.

[0018] This application also provides an electricity meter, including a meter housing and the aforementioned load switch.

[0019] The beneficial effects of the embodiments of this application include:

[0020] This application provides a load switch, including a mounting housing, an electromagnetic drive mechanism, a contact assembly, an arc-extinguishing element, and a terminal block assembly. The electromagnetic drive mechanism and the contact assembly are arranged close to each other along a first direction within the mounting housing. The arc-extinguishing element and the contact assembly are arranged along a second direction, with the first direction perpendicular to the second direction. The terminal block assembly extends at least partially outside the mounting housing and is located on the side of the contact assembly away from the electromagnetic drive mechanism. The electromagnetic drive mechanism includes an electromagnetic coil, a yoke assembly, and a rotating armature assembly. When the electromagnetic coil is energized, the rotating armature assembly drives the contact assembly to open or close the circuit. This application, through improvements to the structural layout of the load switch, effectively reduces the size of the load switch, facilitating miniaturized design. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is one of the structural schematic diagrams of the load switch according to an embodiment of this application;

[0023] Figure 2 This is a second schematic diagram of the load switch according to an embodiment of this application;

[0024] Figure 3 This is the third schematic diagram of the load switch in the embodiments of this application;

[0025] Figure 4 This is the fourth schematic diagram of the load switch in the embodiments of this application;

[0026] Figure 5 This is the fifth schematic diagram of the load switch in the embodiments of this application.

[0027] icon:

[0028] 100-Mounting housing; 101-Electromagnetic drive mechanism; 102-Moving contact; 103-Stationary contact; 104-Moving contact terminal block; 105-Flexible connection wire; 106-Stationary contact terminal block; 107-First direction; 108-Rotating armature assembly; 109-Linkage structure; 110-Connecting part; 111-Moving contact mounting base; 112-Rotating shaft; 113-U-shaped magnetizing component; 114-Magnetic block; 115-Arc extinguishing component; 116-Magnetic shielding cover; 117-First yoke; 118-Second yoke; 119-Second direction; 120-First contact part; 121-Second lead-out part; 122-Third lead-out part; 123-Second end; 124-PCB board; 125-Varistor; 126-Capacitor; 127-Transformer; 128-Microcontroller; 129-High-power resistor. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar reference numerals 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. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "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 application based on the specific circumstances.

[0033] Electricity meters typically contain a PCB board for data exchange with external devices. Furthermore, to ensure accurate and stable energy measurement, they usually require numerous components such as transformers, microcontrollers (MCUs), and capacitors. This significantly limits the space available for load switches, leading to a trend towards miniaturization. Current technologies employ complex transmission structures, such as push-lock mechanisms or gear drives, to move the moving contact 102, requiring substantial assembly space. Additionally, the overall structural layout of existing load switches is not compact enough, resulting in a large overall size. This necessitates significant assembly space when the load switch is installed within the electricity meter, hindering miniaturization design.

[0034] To address the aforementioned technical problems, this application provides a load switch.

[0035] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, this application embodiment provides a load switch, comprising a mounting housing 100, an electromagnetic drive mechanism 101, a contact assembly, an arc-extinguishing element 115, a moving contact terminal block 104, and a stationary contact terminal block 106; the electromagnetic drive mechanism 101 and the contact assembly are arranged close to each other along a first direction 107 within the mounting housing 100; the arc-extinguishing element 115 and the contact assembly are arranged along a second direction 119, the first direction 107 being perpendicular to the second direction 119; at least a portion of the moving contact terminal block 104 and the stationary contact terminal block 106 extend outside the mounting housing 100 and are located on the side of the contact assembly away from the electromagnetic drive mechanism 101; the electromagnetic drive mechanism 101 includes an electromagnetic coil, a yoke assembly, and a rotating armature assembly 108, wherein energizing the electromagnetic coil causes the rotating armature assembly 108 to drive the contact assembly 102 to open or close.

[0036] The contact assembly includes a moving contact 102 and a stationary contact 103; a rotating armature assembly 108 is connected to one end of the moving contact 102, and the electromagnetic coil drives the moving contact 102 to rotate by rotating the armature assembly 108, so that the other end of the moving contact 102 is connected to the stationary contact 103 for opening and closing; one end of the electromagnetic coil is close to the inner wall of the mounting housing 100, and the closed position of the stationary contact 103 and the moving contact 102 is close to the other end of the electromagnetic coil.

[0037] The moving contact 102 and the stationary contact 103 have at least one closed position, and the projection of the electromagnetic drive mechanism 101 along the first direction 107 covers at least one closed position.

[0038] It should be noted that in this embodiment of the application, the electromagnetic drive mechanism 101 is arranged in the first mounting position, and one end of the electromagnetic drive mechanism 101 is close to the inner wall of the mounting housing 100. This arrangement allows the electromagnetic drive mechanism 101 to make full use of the internal space of the mounting housing 100, reduce unnecessary gaps, and thus optimize the compactness of the overall structure.

[0039] Furthermore, in this embodiment, the electromagnetic drive mechanism 101 generates a magnetic field when energized, which drives the moving contact 102 to rotate via the linkage structure 109, thereby realizing the closing or opening operation of the switch. Compared with traditional push-card or gear transmission structures, the drive mechanism of this embodiment has a simpler structure and smaller volume, which can significantly reduce the complexity of the transmission mechanism and the space occupied.

[0040] The contact assembly in this embodiment includes a moving contact 102 and a stationary contact 103, with the closed position of the stationary contact 103 and the moving contact 102 close to the other end of the electromagnetic coil. This embodiment positions the closed position of the stationary contact 103 and the moving contact 102 at one end of the electromagnetic coil and close to it, allowing the moving contact 102 to move within the space between the stationary contact 103 and the electromagnetic drive mechanism 101. This design shortens the movement path of the moving contact 102, reducing the travel required for the moving contact 102 to move from open to closed, further improving the switching speed and response time. Simultaneously, this compact layout reduces the spacing between the contact assembly and other components, optimizing the overall structural compactness.

[0041] In this embodiment of the application, the electromagnetic drive mechanism 101 and the contact assembly are arranged along the first direction 107 and close to each other within the mounting housing 100.

[0042] It should be noted that the first direction 107 can be vertical. The mounting housing 100 of this application embodiment has a first mounting position and a second mounting position that are close to each other, so that the contact assembly can be as close as possible to the electromagnetic drive mechanism 101. This is beneficial to reducing the installation space occupied by the electromagnetic drive mechanism 101 and the contact assembly, and to reducing the length of the load switch, so that the load switch has a smaller volume.

[0043] Reference Figure 1 , Figure 2As shown, in one optional embodiment, the contact assembly includes a moving contact mounting base 111, and a connecting rod structure 109 is provided between the rotating armature assembly 108 and the moving contact mounting base 111; the rotating armature assembly 108 is provided with a connecting part 110 that is hinged to the connecting rod structure 109, the moving contact mounting base 111 and the connecting rod structure 109 are rotatably connected, and the connecting part 110, the connecting rod structure 109 and the moving contact mounting base 111 constitute a four-bar linkage mechanism, and the electromagnetic drive mechanism 101 drives the moving contact 102 and the stationary contact 103 to open and close the circuit through the four-bar linkage mechanism.

[0044] The connecting part 110 is provided with a first rotating hole, and the moving contact mounting seat 111 is provided with a second rotating hole; one end of the connecting rod structure 109 is inserted into the first rotating hole and the other end is inserted into the second rotating hole.

[0045] It should be noted that, in this embodiment of the application, the electromagnetic drive mechanism 101 can drive the rotating armature assembly 108 to move when energized, and the rotating armature assembly 108 drives the moving contact 102 to rotate through the connecting part 110 and the connecting rod structure 109.

[0046] Reference Figure 2 , Figure 3 As shown, in this embodiment, the two ends of the linkage structure 109 are rotatably connected to the moving contact mounting base 111 and the connecting portion 110, respectively, so that the connecting portion 110, the linkage structure 109, and the moving contact mounting base 111 constitute a four-bar linkage. The fixed side of the four-bar linkage is close to the electromagnetic drive mechanism 101.

[0047] This embodiment of the application, through the above-described configuration, can generate a larger driving torque and has a larger torque transmission ratio, avoiding the use of electromagnetic coils with large driving forces. In other words, when the initial torque generated by the electromagnetic coil is transmitted to the moving contact 102 assembly, the torque loss is small. This embodiment of the application can achieve stable closing of the moving contact 102 and the stationary contact 103 using an electromagnetic coil with a smaller driving force.

[0048] Compared to existing technologies, the embodiments of this application achieve power transmission through only one linkage structure 109. Therefore, the embodiments of this application can reduce the use of transmission components and avoid numerous shaft-hole fits, thereby helping to prevent displacement loss during transmission and improving transmission efficiency. Furthermore, the embodiments of this application can effectively reduce the size of the moving contact 102 drive mechanism, which is beneficial for miniaturization design.

[0049] Reference Figure 1 , Figure 2 As shown, in this embodiment of the application, the connecting part 110, the connecting rod structure 109, and the moving contact mounting base 111 form a U-shaped structure with an opening facing the electromagnetic drive mechanism 101.

[0050] Reference Figure 1 , Figure 2 As shown, the yoke assembly of this application embodiment includes a first yoke 117 and a second yoke 118 arranged along a first direction 107, and a rotating armature assembly 108 and an electromagnetic coil arranged along a second direction 119; the first direction 107 and the second direction 119 intersect.

[0051] For example, the first direction 107 is the up-down direction, and the second direction 119 is the left-right direction. The first direction 107 and the second direction 119 may intersect perpendicularly.

[0052] It should be noted that those skilled in the art can adjust the first direction 107 and the second direction 119 according to the needs of the assembly environment.

[0053] Reference Figure 1 , Figure 3 , Figure 4 As shown, the central axis of the electromagnetic coil extends along a first direction 107. The electromagnetic coil has leads on the side near the contact assembly, and the leads extend along a third direction.

[0054] Reference Figure 2 , Figure 3 As shown, in one optional embodiment, the moving contact mounting base 111 is provided with a plurality of moving contacts 102, which are arranged along a third direction; wherein, the first direction 107, the second direction 119 and the third direction are perpendicular to each other; a rotating shaft 112 connected to the mounting housing 100 passes through the moving contact mounting base 111 and the moving contacts 102.

[0055] The contact assembly in this embodiment further includes a moving contact mounting base 111, on which a plurality of moving contacts 102 are disposed. The plurality of moving contacts 102 can increase the closing contact surface with the stationary contact 103. The arrangement of the plurality of moving contacts 102 in this embodiment can effectively increase the closing stability of the load switch. In addition, the plurality of moving contacts 102 can also extend the service life of the load switch.

[0056] Reference Figure 2 , Figure 3 As shown, in one optional embodiment, a U-shaped magnetizing element 113 is provided inside the mounting housing 100. The moving contact 102 has a moving contact portion that can be used to contact or separate from the stationary contact 103 to form a closed position or an open position. The end of the moving contact 102 away from the moving contact portion passes through the opening of the U-shaped magnetizing element 113, and a magnetizing block 114 is provided at the position of the section of the moving contact 102 away from the bottom of the U-shaped magnetizing element 113. The magnetizing block 114 and the moving contact portion are respectively provided on both sides of the rotating shaft 112.

[0057] The U-shaped magnetizing element 113 and the magnetizing block 114 are used to generate a force that causes the moving contact 102 to abut against the stationary contact 103.

[0058] It should be noted that the U-shaped magnetizing element 113 and the magnetizing block 114 in this embodiment of the application can generate a magnetic attraction force. The magnetic attraction force causes the end of the moving contact 102 away from the stationary contact 103 to approach the bottom of the U-shaped magnetizing element 113, thereby generating a force that causes the moving contact 102 to rotate. The end of the moving contact 102 that is close to the stationary contact 103 will generate a force that abuts against the stationary contact 103, ensuring that the moving contact 102 will not be repelled under the action of a large short-circuit current, thus improving the short-circuit withstand performance.

[0059] In this embodiment, the U-shaped magnetizing block 114 helps with closing, which improves the stability of closing and ensures reliable contact between the moving contact 102 and the stationary contact 103. Additionally, an elastic element is provided between the moving contact mounting base 111 and the moving contact 102. When this elastic element is compressed, it generates a force that brings the moving contact 102 closer to the stationary contact 103.

[0060] The embodiments of this application achieve compact assembly by making the two sides of the U-shaped magnetizing component 113 symmetrical about the rotational plane of the moving contact 102, without occupying a large installation space.

[0061] It should be noted that the U-shaped magnetizing component 113 in this application embodiment can be a one-piece structure or a split structure, and those skilled in the art can make the settings as needed.

[0062] Reference Figure 2 , Figure 3 As shown, in an optional implementation, an arc-extinguishing element 115 is also provided inside the mounting housing 100. When the moving contact 102 and the stationary contact 103 are closed, the contact portion of the moving contact 102 and the stationary contact 103 is located at the entrance of the arc-extinguishing element 115. Furthermore, the contact portion of the moving contact 102 and the stationary contact 103, as well as the arc-extinguishing element 115, are all located below the electromagnetic coil, that is, the contact portion of the moving contact 102 and the stationary contact 103 and at least part of the arc-extinguishing element 115 are located within the projection of the electromagnetic drive mechanism 101 along the first direction. Specifically, in this embodiment, the arc-extinguishing element is a U-shaped arc-extinguishing block, and the contact portion of the moving contact 102 and the stationary contact 103 is located in the opening of the U-shaped arc-extinguishing block. The two sides of the U-shaped arc-extinguishing block are symmetrical about the motion plane of the moving contact 102. In other embodiments, it can also be an arc-extinguishing grid or other arc-extinguishing structures, which are not limited here.

[0063] When the load switch switches from the closed to the open state, a high voltage is generated between the moving contact 102 and the stationary contact 103 at the moment of separation, causing the air to break down and forming an electric arc. The electric arc not only consumes a lot of energy, but also generates high temperature, which can easily damage the contacts.

[0064] It should be noted that the U-shaped arc extinguishing element 115 in this application embodiment can be a permanent magnet, which applies a lateral force to the arc through the magnetic field, causing the arc to move along the direction of the magnetic field and away from the contact area, thereby accelerating the cooling and extinguishing of the arc.

[0065] It should be noted that the U-shaped arc-extinguishing element 115 in this embodiment can also generate high-pressure gas, which removes the arc from the contact area, reducing arc erosion of the contacts and extending their service life. Simultaneously, gas arc blowing effectively prevents arc reignition, ensuring reliable switch disconnection.

[0066] Reference Figure 4 As shown, in one optional embodiment, the mounting housing 100 is provided with a magnetic shield 116 arranged circumferentially around the electromagnetic drive mechanism 101. The magnetic shield 116 is rectangular and covers at least four sides of the mounting housing 100; at least one surface of the mounting housing 100 is provided with a protrusion; and the magnetic shield 116 is provided with through holes that mate with the protrusion.

[0067] In this embodiment, the electromagnetic drive mechanism 101 is protected from interference from external magnetic fields by the magnetic shield 116, ensuring stable operation of the load switch and thus guaranteeing the accuracy and reliability of the meter.

[0068] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, as an optional implementation, it also includes a moving contact terminal block 104. The moving contact terminal block 104 extends parallel to the first direction 107 to ensure that there is space to connect with the moving contact 102, and can make full use of the space of the load switch in the first direction 107. The moving contact terminal block 104 is provided with a flexible connecting wire 105, and the end of the moving contact 102 away from the moving contact portion is connected to the flexible connecting wire 105. The flexible connecting wire 105 and the stationary contact 103 are located on the same side of the moving contact 102.

[0069] In this embodiment, the flexible connecting wire 105 and the stationary contact 103 are arranged on the same side of the moving contact 102, so that the flexible connecting wire 105 can be arranged in the space between the moving contact 102 and the inner wall of the mounting housing 100. On the one hand, this can improve the compactness of the structural layout, and on the other hand, it can ensure that the flexible connecting wire 105 has a certain amount of flexibility while keeping its length as short as possible.

[0070] It should be noted that, in this embodiment of the application, one end of the moving contact terminal block 104 is inserted into the mounting housing 100, and the inserted end does not have a bending structure, but is directly inserted into the mounting housing 100 along the axis of the electromagnetic drive mechanism 101. That is to say, in this embodiment of the application, the extending direction of the moving contact terminal block 104 is consistent with the axis of the electromagnetic coil.

[0071] In this embodiment, the insertion end of the moving contact terminal block 104 is directly inserted into the mounting housing 100, making installation convenient and quick, and reducing assembly time and difficulty. Meanwhile, the design of the flexible connecting wire 105 makes the connection between the moving contact terminal block 104 and the moving contact 102 more flexible, facilitating subsequent maintenance and replacement.

[0072] Reference Figure 1 , Figure 2 As shown, as an optional implementation, it also includes a stationary contact terminal block 106. The stationary contact terminal block 106 includes a first contact portion 120, a second lead-out portion 121, a third lead-out portion 122, and a second end portion 123. One end of the second lead-out portion 121 is connected to the first contact portion 120 at an angle, and the other end is connected to the third lead-out portion 122 at an angle, so as to avoid the installation of other electrical components. The second end portion 123 is perpendicularly connected to the third lead-out portion 122 and is used to connect to a terminal block.

[0073] It should be noted that, in this embodiment, one side of the first contact portion 120 abuts against the inner wall of the mounting housing 100, and the other side has a contact point that can make contact with the moving contact 102 when closing. In this embodiment, the inner wall of the mounting housing 100 can provide support for the first contact portion 120, thereby improving the structural stability when the moving contact 102 and the stationary contact 103 make contact when closing, and effectively preventing the stationary contact 103 from loosening.

[0074] In addition, in this embodiment, the first contact portion 120 is disposed directly below the electromagnetic drive mechanism 101, and the movement path of the moving contact 102 is restricted between the electromagnetic drive mechanism 101 and the first contact portion 120, which helps to reduce the movement of the moving contact 102, thereby making the internal structure of the load switch compact.

[0075] This application provides an electricity meter, including a meter housing, the aforementioned load switch and current transformer; the load switch and current transformer are installed inside the meter housing, and are arranged sequentially along the first direction 107.

[0076] Reference Figure 5 As shown, in this embodiment of the application, the load switch is mounted on the surface of the PCB board 124 of the meter. Around the mounting housing 100 are arranged components such as a varistor 125, a capacitor 126, a transformer 127, a microcontroller 128, and a high-power resistor 129. These components are all positioned close to the mounting housing, which helps to reduce the size of the PCB board 124, ultimately enabling a miniaturized meter design.

[0077] The electricity meter in this embodiment uses the above-mentioned load switch. The load switch can achieve a miniaturized design, so the load switch will not occupy a large installation space in the meter housing, which is beneficial to reducing the volume of the meter housing.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A load break switch characterized by, The device includes a mounting housing (100), an electromagnetic drive mechanism (101), a contact assembly, an arc extinguishing element (115), and a terminal block assembly. The electromagnetic drive mechanism (101) and the contact assembly are arranged in the mounting housing (100) along a first direction (107) and close to each other. The arc extinguishing element (115) and the contact assembly are arranged along a second direction (119), with the first direction (107) perpendicular to the second direction (119). The terminal block assembly is used to connect to the contact assembly, extends at least partially outside the mounting housing (100), and is located on the side of the contact assembly away from the electromagnetic drive mechanism (101). The electromagnetic drive mechanism (101) includes an electromagnetic coil, a yoke assembly, and a rotating armature assembly (108). The electromagnetic coil is energized to cause the rotating armature assembly (108) to drive the contact assembly to open or close.

2. The load switch according to claim 1, characterized in that, The contact assembly includes a rotating shaft (112), a moving contact (102), and a stationary contact (103); the moving contact (102) has a moving contact portion for closing / opening with the stationary contact (103); under the drive of the electromagnetic drive mechanism (101), the moving contact portion moves around the rotating shaft (112) closer to or further away from the stationary contact (103) to realize opening or closing.

3. The load switch according to claim 2, characterized in that, The mounting housing (100) is provided with a U-shaped magnetizing element (113); the U-shaped magnetizing element (113) is located on the side of the moving contact (102) away from the stationary contact (103), and the moving contact (102) passes through the opening of the U-shaped magnetizing element (113).

4. The load switch according to claim 2, characterized in that, The terminal block group includes a first terminal block (104) and a second terminal block (106). The first terminal block (104) and the second terminal block (106) each include a connecting segment and a wiring segment connected in sequence. The connecting segment is provided with a sampling pin, and the sampling pin extends along a third direction. The third direction is perpendicular to the first direction (107) and the second direction (119).

5. The load switch according to claim 4, characterized in that, The connecting section of the second terminal block (106) is U-shaped, and its opening faces away from the first terminal block (104).

6. The load switch according to claim 4, characterized in that, A flexible connecting wire (105) is provided on the first terminal block (104), and the end of the moving contact (102) away from the moving contact part is connected to the flexible connecting wire (105).

7. The load switch according to claim 1, characterized in that, The electromagnetic coil has a coil pin on the side near the contact assembly, one end of which extends along a third direction, with the first direction (107), the second direction (119), and the third direction being perpendicular to each other.

8. The load switch according to claim 1, characterized in that, The electromagnetic drive mechanism (101) further includes a yoke assembly disposed on the electromagnetic coil; the yoke assembly includes a first yoke (117) and a second yoke (118) arranged along a first direction (107), the axis of the electromagnetic coil is along the first direction (107), and the rotating armature assembly (108) and the electromagnetic coil are arranged along the second direction (119).

9. The load switch according to claim 2, characterized in that, The contact assembly further includes a moving contact mounting base (111), and a plurality of moving contacts (102) are connected to the moving contact mounting base (111), and the plurality of moving contacts (102) are arranged along a third direction; wherein, the first direction (107), the second direction (119) and the third direction are perpendicular to each other; a connecting rod structure (109) is provided between the rotating armature assembly (108) and the moving contact mounting base (111); a connecting part (110) is provided on the rotating armature assembly (108), one end of the connecting rod structure (109) is connected to the connecting part (110), and the other end is engaged with the second mounting hole on the moving contact mounting base (111), and the engagement position of the two is located on the side of the moving contact (102) away from the stationary contact (103).

10. The load switch according to claim 9, characterized in that, An elastic element is provided between the moving contact mounting base (111) and the moving contact (102). When the elastic element is squeezed, it generates a force that causes the moving contact (102) to move closer to the stationary contact (103).

11. The load switch according to claim 7, characterized in that, The mounting housing (100) is provided with a magnetic shield (116) arranged circumferentially around the electromagnetic drive mechanism (101); the magnetic shield (116) is located on the side of the coil pin away from the terminal block.

12. An electricity meter, characterized in that, Includes the meter housing and the load switch as described in any one of claims 1-9.

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