Load switch and ammeter

Abstract

The invention relates to the technical field of low-voltage electric appliances, in particular to a load switch and an electric meter, which comprise a mounting shell, an electromagnetic driving mechanism and a contact assembly, the electromagnetic driving mechanism and the contact assembly are arranged in the mounting shell along a first direction and are close to each other; the contact assembly comprises a moving contact and a static contact. The rotating armature assembly is connected with one end of the moving contact, and the electromagnetic coil drives the moving contact to rotate through the rotating armature assembly, so that the other end of the moving contact and the static contact are switched on and switched off. The moving contact and the static contact have at least one switching-on position, and the projection of the electromagnetic driving mechanism in the first direction covers the switching-on position. By improving the structural layout of the load switch, the size of the load switch can be effectively reduced, and the miniaturization design of the load switch can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a load switch and an electric meter. Background Art

[0002] The load switch can cut off the rated load current and a certain overload current, and the closing or opening of the switch is achieved by the contact or separation of the moving contact and the static contact inside it. A PCB board will be provided inside the electric meter for data exchange with external devices. Secondly, in order for the electric meter to accurately and stably measure electric energy, many components such as transformers, MCUs, capacitors, etc. are usually required, which greatly limits the space left for the load switch. Therefore, the load switch is gradually developing towards miniaturization. In the prior art, on the one hand, when driving the moving contact to move, a complex transmission structure such as a push card or a gear transmission is used, which requires a large assembly space. On the other hand, the overall structural layout of the load switch provided by the prior art is not compact enough, resulting in a large overall volume of the load switch, resulting in a large assembly space required when the load switch is installed in the electric meter, which is not conducive to the miniaturization design of the electric meter. Summary of the invention

[0003] The purpose of the present application is to provide a load switch and an electric meter, which can effectively reduce the size of the load switch by improving the structural layout of the load switch, thereby facilitating the miniaturization design of the load switch.

[0004] The embodiment of the present application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application provides a load switch, comprising an installation shell, an electromagnetic drive mechanism and a contact assembly; the electromagnetic drive mechanism and the contact assembly are arranged along a first direction in the installation shell and are close to each other; the electromagnetic drive mechanism comprises an electromagnetic coil, a yoke assembly and a rotating armature assembly; the contact assembly comprises a moving contact and a stationary contact; the rotating armature assembly is connected to one end of the moving contact, and the electromagnetic coil drives the moving contact to rotate through the rotating armature assembly so that the other end of the moving contact is opened and closed with the stationary contact; the moving contact and the stationary contact have at least one closing position, and the projection of the electromagnetic drive mechanism along the first direction covers at least one of the closing positions.

[0006] As an optional embodiment, the contact assembly includes a moving contact mounting seat, and a connecting rod structure is arranged between the rotating armature assembly and the moving contact mounting seat; a connecting portion rotatably connected to the connecting rod structure is arranged on the rotating armature assembly, and the moving contact mounting seat is rotatably connected to the connecting rod structure; the connecting portion, the connecting rod structure and the moving contact mounting seat constitute a four-bar linkage mechanism, and the electromagnetic drive mechanism drives the moving contact and the static contact to open and close the switch through the four-bar linkage mechanism.

[0007] As an optional implementation, the connecting portion, the connecting rod structure and the moving contact mounting seat form a U-shaped structure with an opening facing the electromagnetic drive mechanism.

[0008] As an optional embodiment, the yoke assembly includes a first yoke and a second yoke arranged along a first direction, and the rotating armature assembly and the electromagnetic coil are arranged along a second direction; the first direction is perpendicular to the second direction.

[0009] As an optional embodiment, a plurality of the moving contacts are provided on the moving contact mounting seat, and the plurality of the moving contacts are arranged along a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other; a rotating shaft connected to the mounting shell is provided on the moving contact mounting seat and the moving contact.

[0010] As an optional implementation, an elastic element is provided between the moving contact mounting seat and the moving contact, and the elastic element is squeezed to generate a force that causes the moving contact to approach the static contact.

[0011] As an optional embodiment, a U-shaped magnetizing component is provided in the mounting shell, and the moving contact has a moving contact portion for closing / opening the switch with the static contact; the end of the moving contact away from the moving contact portion is inserted into the opening of the U-shaped magnetizing component, and a magnetizing block is provided corresponding to the position of the moving contact insertion section away from the bottom of the U-shaped magnetizing component; the magnetizing block and the moving contact portion are respectively arranged on both sides of the rotating shaft; the U-shaped magnetizing component and the magnetizing block are used to generate a force that causes the moving contact to abut against the static contact.

[0012] As an optional embodiment, an arc extinguishing member is arranged in the mounting shell, and when the moving contact and the static contact are closed, the contact portion between the moving contact and the static contact is located at the entrance of the arc extinguishing member, and the contact portion between the moving contact and the static contact and at least part of the arc extinguishing member are located within the projection of the electromagnetic drive mechanism along the first direction.

[0013] As an optional embodiment, a magnetic shielding cover is provided on the outside of the mounting shell and is arranged circumferentially around the electromagnetic drive mechanism; the magnetic shielding cover is rectangular and covers at least four surfaces of the mounting shell; a protrusion is provided on at least one surface of the mounting shell; and a through hole is provided on the magnetic shielding cover to cooperate with the protrusion.

[0014] As an optional embodiment, it also includes a moving contact terminal block, which extends in a direction parallel to the axis of the electromagnetic coil; the moving contact terminal block is provided with a soft connecting wire, and the end of the moving contact away from the moving contact part is connected to the soft connecting wire; the soft connecting wire and the static contact are arranged on the same side of the moving contact.

[0015] As an optional embodiment, it also includes a static contact terminal block, which includes a first contact portion for setting a contact point, a second lead-out portion and a third lead-out portion, and a second end portion, one end of the second lead-out portion is connected to the first contact portion at an angle, the other end is connected to the third lead-out portion at an angle, the second end portion is vertically connected to the third lead-out portion, and the second end portion is used to connect to a terminal.

[0016] In a second aspect, an embodiment of the present application provides an electric meter, comprising an electric meter housing, the above-mentioned load switch and a mutual inductor; the load switch and the mutual inductor are installed inside the electric meter housing, and the load switch and the mutual inductor are arranged in sequence along a first direction.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The embodiment of the present application provides a load switch, including a mounting housing, an electromagnetic drive mechanism and a contact assembly; the electromagnetic drive mechanism and the contact assembly are arranged in a first direction in the mounting housing and close to each other. The embodiment of the present application makes the contact assembly close to the electromagnetic drive mechanism, which is conducive to reducing the installation space occupied by the electromagnetic drive mechanism and the contact assembly, so that the mounting housing has a smaller volume. The electromagnetic drive mechanism of the embodiment of the present application includes an electromagnetic coil, a yoke assembly and a rotating armature assembly; the contact assembly includes a moving contact and a static contact; the rotating armature assembly is connected to one end of the moving contact, and the electromagnetic coil drives the moving contact to rotate through the rotating armature assembly, so that the other end of the moving contact is separated and closed with the static contact; one end of the electromagnetic coil is close to the inner wall of the mounting housing, and the closing position of the static contact and the moving contact is close to the other end of the electromagnetic coil. The embodiment of the present application arranges the closing position of the static contact and the moving contact at one end of the electromagnetic drive mechanism and close to the electromagnetic drive mechanism, which is conducive to reducing the length of the load switch, so that the load switch has a smaller volume.

[0019] The embodiment of the present application provides an electric meter, including an electric meter housing, the above-mentioned load switch and a mutual inductor; the load switch and the mutual inductor are installed inside the electric meter housing, and the load switch and the mutual inductor are arranged in sequence along a first direction. The electric meter of the embodiment of the present application adopts the above-mentioned load switch, and the load switch can be miniaturized, so the load switch does not occupy a large installation space in the electric meter housing, which is conducive to reducing the volume of the electric meter housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is one of the structural schematic diagrams of the load switch in the embodiment of the present application;

[0022] Figure 2 This is the second structural diagram of the load switch in the embodiment of the present application;

[0023] Figure 3 This is the third structural diagram of the load switch of the embodiment of the present application;

[0024] Figure 4 This is the fourth structural diagram of the load switch of the embodiment of the present application;

[0025] Figure 5 This is the fifth structural schematic diagram of the load switch according to the embodiment of the present application.

[0026] icon:

[0027] 100-installation housing; 101-electromagnetic drive mechanism; 102-moving contact; 103-static contact; 104-moving contact terminal block; 105-flexible connecting wire; 106-static contact terminal block; 107-first direction; 108-rotating armature assembly; 109-connecting rod structure; 110-connecting part; 111-moving contact mounting seat; 112-rotating shaft; 113-U-shaped magnetizing part; 114-magnetizing block; 115-arc extinguishing part; 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 DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] A PCB board is provided inside the electric meter for data exchange with external devices. Secondly, in order for the electric meter to accurately and stably measure electric energy, many components such as transformers, microcontrollers (MCUs), capacitors, etc. are usually required, which greatly limits the space left for the load switch. Therefore, the load switch is gradually developing towards miniaturization. In the prior art, on the one hand, a complex transmission structure such as a push card or a gear transmission is used to drive the moving contact 102 to move, which requires a large assembly space. On the other hand, the overall structural layout of the load switch provided by the prior art is not compact enough, resulting in a large overall volume of the load switch, resulting in a large assembly space required when the load switch is installed in the electric meter, which is not conducive to the miniaturization design of the electric meter.

[0033] In order to solve the above technical problems, an embodiment of the present application provides a load switch and an electric meter.

[0034] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, the embodiment of the present application provides a load switch, including a mounting housing 100, an electromagnetic drive mechanism 101, and a contact assembly; the electromagnetic drive mechanism 101 and the contact assembly are arranged along a first direction 107 in the mounting housing 100 and are close to each other;

[0035] The electromagnetic drive mechanism 101 includes an electromagnetic coil, a yoke assembly and a rotating armature assembly 108; the contact assembly includes a moving contact 102 and a stationary contact 103; the 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 through the rotating armature assembly 108, so that the other end of the moving contact 102 is opened and closed with the stationary contact 103; one end of the electromagnetic coil is close to the inner wall of the mounting shell 100, and the closing position of the stationary contact 103 and the moving contact 102 is close to the other end of the electromagnetic coil.

[0036] The moving contact 102 and the stationary contact 103 have at least one closing position, and the projection of the electromagnetic drive mechanism 101 along the first direction 107 covers at least one closing position.

[0037] It should be noted that the electromagnetic drive mechanism 101 of the embodiment of the present application is arranged in the first installation position, and one end of the electromagnetic drive mechanism 101 is close to the inner wall of the installation shell 100. This arrangement enables the electromagnetic drive mechanism 101 to make full use of the internal space of the installation shell 100, reduce unnecessary gaps, and thus optimize the compactness of the overall structure.

[0038] In addition, the electromagnetic drive mechanism 101 of the embodiment of the present application generates a magnetic field when it is energized, and the movable contact 102 is driven to rotate through the connecting rod structure 109 to achieve the closing or opening operation of the switch. Compared with the traditional push card or gear transmission structure, the drive mechanism of the embodiment of the present application has a simpler structure and a smaller volume, which can significantly reduce the complexity of the transmission mechanism and the space occupied.

[0039] The contact assembly of the embodiment of the present application includes a moving contact 102 and a stationary contact 103, and the closing position of the stationary contact 103 and the moving contact 102 is close to the other end of the electromagnetic coil. The implementation of the present application arranges the closing position of the stationary contact 103 and the moving contact 102 at one end of the electromagnetic coil and close to the electromagnetic coil, so that the moving contact 102 moves in the space between the stationary contact 103 and the electromagnetic drive mechanism 101. The design of the embodiment of the present application shortens the movement path of the moving contact 102, reduces the travel required for the moving contact 102 from opening to closing, and further improves the action speed and response time of the switch. At the same time, this compact layout also reduces the spacing between the contact assembly and other components, optimizing the compactness of the overall structure.

[0040] The electromagnetic drive mechanism 101 and the contact assembly of the embodiment of the present application are arranged in the mounting housing 100 along the first direction 107 and close to each other.

[0041] It should be noted that the first direction 107 may be an up-down direction. The installation housing 100 of the embodiment of the present application has a first installation position and a second installation position close to each other, so that the contact assembly can be as close to the electromagnetic drive mechanism 101 as possible, which is conducive to reducing the installation space occupied by the electromagnetic drive mechanism 101 and the contact assembly, and is conducive to reducing the length of the load switch, so that the load switch has a smaller volume.

[0042] Reference Figure 1 , Figure 2As shown, as an optional embodiment, the contact assembly includes a moving contact mounting seat 111, and a connecting rod structure 109 is arranged between the rotating armature assembly 108 and the moving contact mounting seat 111; a connecting portion 110 hinged to the connecting rod structure 109 is arranged on the rotating armature assembly 108, and the moving contact mounting seat 111 is rotatably connected to the connecting rod structure 109, and the moving contact mounting seat 111 is rotatably connected to the connecting rod structure 109; the connecting portion 110, the connecting rod structure 109 and the moving contact mounting seat 111 constitute a four-bar linkage, and the electromagnetic drive mechanism 101 drives the moving contact 102 and the static contact 103 to open and close through the four-bar linkage.

[0043] It should be noted that, when the electromagnetic drive mechanism 101 of the embodiment of the present application is energized, it can drive the rotating armature assembly 108 to move, and the rotating armature assembly 108 drives the moving contact 102 to rotate through the connecting portion 110 and the connecting rod structure 109 .

[0044] Reference Figure 2 , Figure 3 As shown, the two ends of the connecting rod structure 109 of the embodiment of the present application are rotatably connected to the movable contact mounting seat 111 and the connecting portion 110, so that the connecting portion 110, the connecting rod structure 109 and the movable contact mounting seat 111 form a four-bar linkage. The fixed side of the four-bar linkage is close to the electromagnetic drive mechanism 101.

[0045] The embodiment of the present application can generate a large driving torque through the above-mentioned arrangement, has a large torque transmission ratio, and avoids the use of an electromagnetic coil with a large driving force. In other words, when the initial torque generated by the electromagnetic coil is transmitted to the moving contact 102 component, the torque loss is small. The embodiment of the present application uses an electromagnetic coil with a small driving force to meet the stable closing of the moving contact 102 and the static contact 103.

[0046] Compared with the prior art, the embodiment of the present application realizes power transmission through only one connecting rod structure 109. Therefore, the embodiment of the present application can reduce the use of transmission parts and avoid more shaft hole matching, which is conducive to preventing displacement loss during the transmission process, thereby improving transmission efficiency. In addition, the embodiment of the present application can effectively reduce the volume of the driving mechanism of the moving contact 102, which is conducive to miniaturization design.

[0047] Reference Figure 1 , Figure 2 As shown, the connecting portion 110 , the connecting rod structure 109 and the moving contact mounting seat 111 of the embodiment of the present application form a U-shaped structure with an opening facing the electromagnetic drive mechanism 101 .

[0048] Reference Figure 1 , Figure 2As shown, the yoke assembly of the embodiment of the present application includes a first yoke 117 and a second yoke 118 arranged along a first direction 107 , and the rotating armature assembly 108 and the electromagnetic coil are arranged along a second direction 119 ; the first direction 107 intersects with the second direction 119 .

[0049] Exemplarily, the first direction 107 is an up-down direction, and the second direction 119 is a left-right direction. The first direction 107 and the second direction 119 may intersect each other perpendicularly.

[0050] It should be noted that those skilled in the art can adjust the first direction 107 and the second direction 119 according to the requirements of the assembly environment.

[0051] Reference Figure 2 , Figure 3 As shown, as an optional embodiment, the moving contact mounting seat 111 is provided with a plurality of moving contacts 102, 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 rotating shaft 112 connected to the mounting shell 100 is provided on the moving contact mounting seat 111 and the moving contact 102.

[0052] The contact assembly of the embodiment of the present application further includes a moving contact mounting seat 111, on which a plurality of moving contacts 102 are arranged, and the plurality of moving contacts 102 can increase the closing contact surface with the static contact 103. The embodiment of the present application can effectively increase the closing stability of the load switch by providing a plurality of moving contacts 102. In addition, the plurality of moving contacts 102 can also increase the service life of the load switch.

[0053] Reference Figure 2 , Figure 3 As shown, as an optional embodiment, a U-shaped magnetizing component 113 is provided in the mounting shell 100, and the moving contact 102 has a moving contact portion that can be used to contact or separate from the static contact 103 to form a closed position or an open position, and one end of the moving contact 102 away from the moving contact portion is inserted into the opening of the U-shaped magnetizing component 113, and a magnetizing block 114 is correspondingly provided at the position where the moving contact 102 is inserted away from the bottom of the U-shaped magnetizing component 113; the magnetizing block 114 and the moving contact portion are respectively arranged on both sides of the rotating shaft 112.

[0054] The U-shaped magnetizing member 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 .

[0055] It should be noted that a magnetic attraction force can be generated between the U-shaped magnetizing component 113 and the magnetizing block 114 of the embodiment of the present application. Through the magnetic attraction force, the end of the moving contact 102 away from the static contact 103 is close to the bottom of the U-shaped magnetizing component 113, thereby generating a force that causes the moving contact 102 to rotate. The end of the moving contact 102 close to the static contact 103 generates abutting force with the static contact 103, ensuring that the moving contact 102 will not be repelled under the action of a large short-circuit current, thereby improving the short-circuit withstand performance.

[0056] The embodiment of the present application can help close the switch by setting the U-shaped magnetizing block 114, which is beneficial to improve the stability of closing the switch and ensure reliable contact between the moving contact 102 and the static contact 103. In addition, an elastic element is provided between the moving contact mounting seat 111 and the moving contact 102, and the elastic element is squeezed to generate a force that makes the moving contact 102 close to the static contact 103.

[0057] In the embodiment of the present application, the two sides of the U-shaped magnetizing member 113 are symmetrical about the rotation plane of the moving contact 102, so that compact assembly can be achieved without occupying a large installation space.

[0058] It should be noted that the U-shaped magnetizing component 113 of the embodiment of the present application can be an integrally formed structure or a split structure, and those skilled in the art can configure it according to needs.

[0059] Reference Figure 2 , Figure 3 As shown, as an optional embodiment, an arc extinguishing member 115 is further provided in the mounting shell 100, and when the moving contact 102 and the stationary contact 103 are closed, the contact portion between the moving contact 102 and the stationary contact 103 is located at the entrance of the arc extinguishing member 115; and the contact portion between the moving contact 102 and the stationary contact 103 and the arc extinguishing member 115 are all located below the electromagnetic coil, that is, the contact portion between the moving contact 102 and the stationary contact 103 and at least part of the arc extinguishing member 115 are located within the projection of the electromagnetic drive mechanism 101 along the first direction; specifically, in the present embodiment, the arc extinguishing member is a U-shaped arc extinguishing block, and the contact portion between the moving contact 102 and the stationary contact 103 is located in the opening of the U-shaped arc extinguishing block, and the two sides of the U-shaped arc extinguishing block are symmetrical about the movement plane of the moving contact 102, and in other embodiments, it may also be other arc extinguishing structures such as arc extinguishing grids, which are not limited here.

[0060] When the load switch switches from the closed state to the open state, a high voltage is generated between the contacts when the moving contact 102 and the static contact 103 separate, causing the air to be broken down and an arc to be formed. The arc not only consumes a lot of energy, but also generates high temperature, which can easily damage the contacts.

[0061] It should be noted that the U-shaped arc extinguishing member 115 of the embodiment of the present application 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.

[0062] It should be noted that the U-shaped arc extinguishing member 115 of the embodiment of the present application can also generate high-pressure gas, which moves the arc out of the contact area, reduces the erosion of the arc on the contact, and prolongs the service life of the contact. At the same time, the gas arc blowing can also effectively prevent the arc from reigniting and ensure the reliable disconnection of the switch.

[0063] Reference Figure 4 As shown, as an optional embodiment, a magnetic shielding cover 116 is arranged circumferentially around the electromagnetic drive mechanism 101 on the outside of the installation housing 100. The magnetic shielding cover 116 is rectangular and covers at least four surfaces of the installation housing 100; at least one surface of the installation housing 100 is provided with a protrusion; and the magnetic shielding cover 116 is provided with a through hole that cooperates with the protrusion.

[0064] In the embodiment of the present application, the magnetic shielding cover 116 is provided to protect the electromagnetic driving mechanism 101 from interference of the external magnetic field, thereby ensuring stable operation of the load switch and further ensuring the accuracy and reliability of the electric meter.

[0065] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, as an optional embodiment, it also includes a moving contact terminal block 104, which extends in parallel with the first direction 107 to ensure that there is space to achieve connection with the moving contact 102, and can fully utilize the space of the load switch in the first direction 107; the moving contact terminal block 104 is provided with a soft connecting wire 105, and the end of the moving contact 102 away from the moving contact part is connected to the soft connecting wire 105; the soft connecting wire 105 and the static contact 103 are arranged on the same side of the moving contact 102.

[0066] In the embodiment of the present application, the flexible connecting wire 105 and the static 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 shell 100. On the one hand, the compactness of the structural layout can be improved, and on the other hand, the flexible connecting wire 105 can be ensured to have a movable margin while being as short as possible.

[0067] It should be noted that one end of the movable contact terminal row 104 of the embodiment of the present application is inserted into the mounting housing 100, and the insertion end is not provided with a bending structure, and is directly inserted into the mounting housing 100 along the axis direction of the electromagnetic drive mechanism 101. In other words, the extending direction of the movable contact terminal row 104 of the embodiment of the present application is consistent with the axis of the electromagnetic coil.

[0068] The plug-in end of the movable contact terminal block 104 of the embodiment of the present application is directly plugged into the mounting housing 100, which is convenient and quick to install, reducing assembly time and difficulty. At the same time, the design of the soft connecting wire 105 makes the connection between the movable contact terminal block 104 and the movable contact 102 more flexible, which is convenient for subsequent maintenance and replacement.

[0069] Reference Figure 1 , Figure 2 As shown, as an optional embodiment, it also includes a static contact terminal row 106, which includes a first contact portion 120 for setting a contact point, a second lead-out portion 121 and 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 to facilitate avoiding the installation of other electrical components. The second end portion 123 is vertically connected to the third lead-out portion 122, and the second end portion 123 is used to connect to the terminal.

[0070] It should be noted that one side of the first contact portion 120 of the embodiment of the present application abuts against the inner wall of the mounting housing 100, and the other side has a contact point that can make closing contact with the moving contact 102. The embodiment of the present application can support the first contact portion 120 through the inner wall of the mounting housing 100, thereby improving the structural stability when the moving contact 102 and the static contact 103 are in closing contact, and effectively preventing the static contact 103 from loosening.

[0071] In addition, in the embodiment of the present application, the first contact portion 120 is disposed directly below the electromagnetic drive mechanism 101, and the movement path of the moving contact 102 is limited between the electromagnetic drive mechanism 101 and the first contact portion 120, which is beneficial to reducing the movement of the moving contact 102, thereby making the internal structure of the load switch compact.

[0072] An embodiment of the present application provides an electric meter, including an electric meter housing, the above-mentioned load switch and a mutual inductor; the load switch and the mutual inductor are installed inside the electric meter housing, and the load switch and the mutual inductor are arranged in sequence along a first direction 107.

[0073] Reference Figure 5 As shown, the load switch of the embodiment of the present application is installed on the surface of the PCB board 124 of the electric meter, and components such as a varistor 125, a capacitor 126, a transformer 127, a microcontroller 128, and a high-power resistor 129 are arranged around the mounting housing 100. These components are arranged close to the mounting housing, which is conducive to reducing the volume of the PCB board 124, and finally enables the electric meter to achieve a miniaturized design.

[0074] The electric meter of the embodiment of the present application adopts the above-mentioned load switch, and the load switch can be designed to be miniaturized, so the load switch will not occupy a large installation space in the electric meter housing, which is conducive to reducing the volume of the electric meter housing.

[0075] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A load switch, characterized in that: The invention comprises an installation shell (100), an electromagnetic drive mechanism (101) and a contact assembly; the electromagnetic drive mechanism (101) and the contact assembly are arranged in a first direction (107) in the installation shell (100) and are close to each other; the electromagnetic drive mechanism (101) comprises an electromagnetic coil, a yoke assembly and a rotating armature assembly (108); the contact assembly comprises a moving contact (102) and a stationary contact (103); the 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 through the rotating armature assembly (108), so that the other end of the moving contact (102) and the stationary contact (103) are opened and closed; the moving contact (102) and the stationary contact (103) have at least one closing position, and the projection of the electromagnetic drive mechanism (101) along the first direction (107) covers at least one of the closing positions.

2. The load switch according to claim 1, characterized in that: The contact assembly comprises a moving contact mounting seat (111); a connecting rod structure (109) is arranged between the rotating armature assembly (108) and the moving contact mounting seat (111); a connecting portion (110) rotatably connected to the connecting rod structure (109) is arranged on the rotating armature assembly (108); the moving contact mounting seat (111) is rotatably connected to the connecting rod structure (109); the connecting portion (110), the connecting rod structure (109) and the moving contact mounting seat (111) constitute a four-bar linkage mechanism; the electromagnetic drive mechanism (101) drives the moving contact (102) and the static contact (103) to open and close via the four-bar linkage mechanism.

3. The load switch according to claim 2, characterized in that: The connecting portion (110), the connecting rod structure (109) and the moving contact mounting seat (111) form a U-shaped structure with an opening facing the electromagnetic drive mechanism (101).

4. The load switch according to claim 2, characterized in that: The yoke assembly comprises a first yoke (117) and a second yoke (118) arranged along a first direction (107); the rotating armature assembly (108) and the electromagnetic coil are arranged along a second direction (119); and the first direction (107) is perpendicular to the second direction (119).

5. The load switch according to claim 4, characterized in that: A plurality of the moving contacts (102) are arranged on the moving contact mounting seat (111), and the plurality of the 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; and a rotating shaft (112) connected to the mounting housing (100) is provided on the moving contact mounting seat (111) and the moving contact (102).

6. The load switch according to claim 5, characterized in that: An elastic element is provided between the moving contact mounting seat (111) and the moving contact (102), and the elastic element is squeezed to generate a force that causes the moving contact (102) to approach the stationary contact (103).

7. The load switch according to claim 5, characterized in that: A U-shaped magnetizing component (113) is provided in the installation housing (100); the moving contact (102) has a moving contact portion for closing / opening the switch with the stationary contact (103); an end of the moving contact (102) away from the moving contact portion is inserted into the opening of the U-shaped magnetizing component (113), and a magnetizing block (114) is provided corresponding to a position of the inserted section of the moving contact (102) away from the bottom of the U-shaped magnetizing component (113); The magnetizing block (114) and the moving contact part are respectively arranged on both sides of the rotating shaft (112); the U-shaped magnetizing component (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).

8. The load switch according to any one of claims 1 to 3, characterized in that: An arc extinguishing member (115) is arranged in the installation shell (100); when the moving contact (102) and the stationary contact (103) are closed, the contact portion between the moving contact (102) and the stationary contact (103) is located at the entrance of the arc extinguishing member (115), and the contact portion between the moving contact (102) and the stationary contact (103) and at least part of the arc extinguishing member (115) are located within the projection of the electromagnetic drive mechanism (101) along the first direction.

9. The load switch according to any one of claims 1 to 3, characterized in that: A magnetic shielding cover (116) is arranged circumferentially around the electromagnetic drive mechanism (101) on the outside of the installation shell (100); the magnetic shielding cover (116) is rectangular and covers at least four surfaces of the installation shell (100); at least one surface of the installation shell (100) is provided with a protrusion; and the magnetic shielding cover (116) is provided with a through hole that cooperates with the protrusion.

10. The load switch according to claim 7, characterized in that: It also includes a moving contact terminal row (104), the moving contact terminal row (104) extending in parallel with the first direction (107); the moving contact terminal row (104) is provided with a soft connecting wire (105), and the end of the moving contact (102) away from the moving contact portion is connected to the soft connecting wire (105); the soft connecting wire (105) and the static contact (103) are arranged on the same side of the moving contact (102).

11. The load switch according to any one of claims 1 to 3, characterized in that: It also includes a stationary contact terminal block (106), which includes a first contact portion (120) for setting a contact point, a second lead portion (121) and a third lead portion (122), and a second end portion (123), one end of the second lead portion (121) is connected to the first contact portion (120) at an angle, and the other end is connected to the third lead portion (122) at an angle, the second end portion (123) is vertically connected to the third lead portion (122), and the second end portion (123) is used to connect to a terminal.

12. An electric meter, characterized in that: It comprises an electric meter housing, a load switch as claimed in any one of claims 1 to 11, and a mutual inductor; the load switch and the mutual inductor are installed inside the electric meter housing, and the load switch and the mutual inductor are arranged in sequence along a first direction (107).

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