Load switch and electricity meter

Abstract

The utility model provides a load switch and an ammeter, and relates to the technical field of low-voltage electric appliances. The load switch comprises a shell, a driving mechanism, a moving contact, a first static contact, a second static contact and a leading-out bar, the driving mechanism, the moving contact, the first static contact, the second static contact and the leading-out bar are respectively connected to the shell, the driving mechanism is in driving connection with the moving contact, and the second static contact is connected with the leading-out bar; the driving mechanism drives the moving contact to move to a first working position, one end of the moving contact is in clamping connection with the first static contact, and the other end of the moving contact is in contact connection with the second static contact; and the driving mechanism drives the moving contact to move to the second working position, and the moving contact is separated from the first static contact, so that the first static contact and the second static contact are disconnected. The load switch can shorten the length of the conductive circuit and prolong the service life of the conductive circuit.

Description

Technical Field

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

[0002] The load switch is a major component of today's smart meters. It is a control component that uses the interaction and relative movement of the electromagnetic coil and permanent magnet under the action of a drive control signal to close and open the contact mechanism. It can remain in the on or off state after the drive control signal disappears.

[0003] A load switch primarily consists of a static contact, a moving contact, and a drive mechanism. The drive mechanism drives the moving contact to open and close the moving and static contacts, thereby connecting or disconnecting the conductive circuit. Existing load switches typically utilize flexible connecting wires for their conductive circuits. However, these flexible connecting wires suffer from long paths, high contact resistance, and high cost. Furthermore, flexible connecting wires are prone to hardening and breaking at high temperatures, which reduces the lifespan of the conductive circuit. Therefore, it is important to develop a new load switch that addresses the long paths and short lifespan of existing conductive circuits. Utility Model Content

[0004] The purpose of the utility model is to provide a load switch and an electric meter, which can shorten the length of the conductive line and increase the service life of the conductive line.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] In one aspect, the present invention provides a load switch, comprising a housing, and a drive mechanism, a movable contact, a first stationary contact, a second stationary contact, and a lead strip, each connected to the housing. The drive mechanism is drivably connected to the movable contact, and the second stationary contact is connected to the lead strip. The drive mechanism drives the movable contact to a first operating position, where one end of the movable contact is clamped and connected to the first stationary contact and the other end is in contact and connected to the second stationary contact. The drive mechanism drives the movable contact to a second operating position, where the movable contact disengages from the first stationary contact, disconnecting the first and second stationary contacts. This load switch can shorten the length of a conductive circuit and increase the life of the conductive circuit.

[0007] Optionally, the moving contact is rotatably connected to the housing.

[0008] Optionally, the load switch also includes a contact support, which includes a first body having an accommodating cavity and a first connecting portion protruding from the outer wall of the first body; the moving contact portion is inserted into the accommodating cavity, the first body is rotatably connected to the shell, and the first connecting portion is drivably connected to the driving mechanism; the driving mechanism drives the contact support to move, and the contact support can drive the moving contact to switch between the first working position and the second working position.

[0009] Optionally, one end of the movable contact maintains contact connection with the second stationary contact, and the movable contact is driven to rotate relative to the second stationary contact.

[0010] Optionally, the load switch further comprises a reset spring, one end of which is fixed relatively to the housing and the other end of which is in contact with the contact support; the reset spring has a tendency to drive the contact support to move toward the second working position.

[0011] Optionally, the first connecting portion is located on a side of the first plane away from the second static contact, and the first plane is a plane formed by the length direction of the moving contact and the width direction of the moving contact.

[0012] Optionally, when the load switch is in the first working position, there is a first angle between the moving contact and the lead-out row; when the load switch is in the second working position, there is a second angle between the moving contact and the lead-out row, and the first angle is smaller than the second angle; and the moving contact is located on the same side of the lead-out row when it is in the first working position and when it is in the second working position.

[0013] Optionally, the first static contact includes a second body, a protrusion connected to the second body, and an arc-striking arm connected to the second body; the protrusion is protruding from the side of the second body close to the moving contact, and the arc-striking arm extends from the protrusion toward the side away from the moving contact; the moving contact has a clamping portion at one end close to the first static contact, the clamping portion can clamp the protrusion, and the arc-striking arm is located on one side of the arc extinguishing chamber of the load switch; and / or, the driving mechanism includes an electromagnetic system and a transmission member; the electromagnetic system includes a coil assembly, an armature and a yoke, the yoke has a connecting end and a mounting end, the coil assembly is connected to the connecting end, the armature is rotatably connected to the mounting end, and the armature is driven and connected to the contact support through the transmission member; the coil assembly is energized to drive the armature to rotate to drive the transmission member to move, so that the transmission member drives the contact support to switch between the first working position and the second working position.

[0014] Optionally, when the driving mechanism includes an electromagnetic system, the first static contact, the movable contact and the electromagnetic system are arranged in sequence along a first direction, the first static contact and the arc extinguishing chamber are arranged along a second direction, and the first direction and the second direction are perpendicular.

[0015] Optionally, when the driving mechanism includes an electromagnetic system, the distance from the electromagnetic system to the central axis of the electric meter is smaller than the distance from the moving contact to the central axis of the electric meter.

[0016] Another aspect of the present invention provides an electric meter, which includes the above-mentioned load switch, and the load switch is installed in the meter housing.

[0017] The beneficial effects of the utility model include:

[0018] The load switch provided by the present application includes a housing, and a driving mechanism, a moving contact, a first static contact, a second static contact and a lead-out row respectively connected to the housing, the driving mechanism and the moving contact are driven and connected, and the second static contact is connected to the lead-out row; the driving mechanism drives the moving contact to move to the first working position, one end of the moving contact is clamped and connected with the first static contact and the other end is in contact and connected with the second static contact; the driving mechanism drives the moving contact to move to the second working position, and the moving contact is disengaged from the first static contact, so that the first static contact and the second static contact are disconnected. When the present application is in the first working position, by clamping and connecting one end of the moving contact with the first static contact and the other end in contact and connected with the second static contact, the flexible connecting wire can be omitted. Compared with the existing load switch conductive circuit using a flexible connecting wire solution, the load switch of the present application can shorten the length of the conductive circuit, thus reducing contact resistance and reducing the cost of the load switch, and the flexible connecting wire will not become hard and easily break in a high temperature environment, thereby increasing the service life of the conductive circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a load switch provided in an embodiment of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the load switch with the shell removed;

[0022] Figure 3 A schematic structural diagram of a first static contact, a moving contact, a second static contact, a contact support and a lead row provided in an embodiment of the present utility model;

[0023] Figure 4 A schematic structural diagram of a first static contact provided in an embodiment of the present utility model;

[0024] Figure 5 A schematic structural diagram of a moving contact and a contact support provided in an embodiment of the present utility model;

[0025] Figure 6 This is a structural diagram of the first static contact, the moving contact, the second static contact and the lead row provided in an embodiment of the present utility model.

[0026] Icons: 10-housing; 20-driving mechanism; 21-electromagnetic system; 211-coil assembly; 212-armature; 213-yoke; 22-transmission member; 30-moving contact; 31-clamping portion; 41-first static contact; 411-second body; 412-raised portion; 413-arcing arm; 42-second static contact; 50-lead-out row; 60-contact support; 61-first body; 611-accommodating chamber; 62-first connecting portion; 63-second connecting portion; 70-reset spring; α-first angle; β-second angle; 80-arcing chamber; a-first direction; b-second direction. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it 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 rather that it can be slightly tilted.

[0032] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] Please refer to Figure 1 and Figure 2 This embodiment provides a load switch, comprising a housing 10, and a drive mechanism 20, a movable contact 30, a first static contact 41, a second static contact 42, and a lead strip 50, each connected to the housing 10. The drive mechanism 20 is drivably connected to the movable contact 30, and the second static contact 42 is connected to the lead strip 50. The drive mechanism 20 drives the movable contact 30 to a first operating position, where one end of the movable contact 30 is clamped and connected to the first static contact 41 and the other end is in contact and connected to the second static contact 42. The drive mechanism 20 drives the movable contact 30 to a second operating position, where the movable contact 30 disengages from the first static contact 41, thereby disconnecting the first and second static contacts 41 and 42. This load switch can shorten the length of a conductive circuit and improve the life of the conductive circuit.

[0034] It should be noted that the load switch of the present application includes a housing 10, a drive mechanism 20, a movable contact 30, a first static contact 41, a second static contact 42, and a lead strip 50. The drive mechanism 20, the movable contact 30, the first static contact 41, the second static contact 42, and the lead strip 50 are at least partially located within the housing 10.

[0035] In this embodiment, the driving mechanism 20 is driven and connected to the moving contact 30, and can drive the moving contact 30 to move in the housing 10 so that the moving contact 30 connects the first static contact 41 and the second static contact 42, or disconnects the first static contact 41 and the second static contact 42.

[0036] It should be noted that the moving contact 30 has two working positions, namely the first working position and the second working position. The first working position is the closed position of the load switch, and the second working position is the open position of the load switch. In the first working position, one end of the moving contact 30 is connected to the first static contact 41 and the other end is connected to the second static contact 42. The end of the second static contact 42 away from the moving contact 30 is connected to the lead bar 50. In the second working position, one end of the moving contact 30 is disconnected from the first static contact 41 (the other end of the moving contact 30 can be disconnected from or connected to the second static contact 42), and the end of the second static contact 42 away from the moving contact 30 is connected to the lead bar 50.

[0037] In addition, in this embodiment, the second static contact 42 and the lead-out row 50 can be integrally formed. In this way, the second static contact 42 and the lead-out row 50 can be used as a component, which can simplify the assembly connection relationship of the load switch and improve the connection reliability of the overall structure of the load switch.

[0038] It is worth noting that, in the present application, when the circuit is closed, one end of the moving contact 30 is clamped and connected to the first static contact 41, and the other end is in contact with the second static contact 42. Thus, compared with the prior art which uses a soft connecting wire to connect the static contact plate and the moving contact 30, the opening or closing of the circuit is achieved by driving the moving contact 30 to move so that the moving contact 30 and the static contact are in contact; the connection method of the moving contact 30 of the present application (when closing the circuit, one end of the moving contact 30 is clamped and connected to the first static contact 41, and the other end is in contact with the second static contact 42; when opening the circuit, the moving contact 30 is disconnected from the first static contact 41) can eliminate the soft connecting wire, thereby shortening the length of the conductive circuit and improving the service life of the conductive circuit.

[0039] In this embodiment, when the load switch is in the first working position, the first static contact 41, the moving contact 30, the second static contact 42 and the lead-out row 50 are connected in sequence to form a conductive circuit; in the second working position, the moving contact 30 is separated from the first static contact 41, and the conductive circuit is disconnected.

[0040] In addition, it should be noted that, optionally, please refer to Figure 2 、 Figure 4 and Figure 5 As shown, the first static contact 41 and the movable contact 30 are clamped and connected. The clamping connection method is not specifically limited in this application, and the first static contact 41 can clamp the movable contact 30, or the movable contact 30 can clamp the first static contact 41.

[0041] To summarize, the load switch provided in the present application includes a housing 10, and a driving mechanism 20, a moving contact 30, a first static contact 41, a second static contact 42 and a lead-out row 50 respectively connected to the housing 10, the driving mechanism 20 and the moving contact 30 are driven and connected, and the second static contact 42 and the lead-out row 50 are connected; the driving mechanism 20 drives the moving contact 30 to move to the first working position, one end of the moving contact 30 is clamped and connected to the first static contact 41 and the other end is in contact and connected with the second static contact 42; the driving mechanism 20 drives the moving contact 30 to move to the second working position, and the moving contact 30 disengages from the first static contact 41 to disconnect the first static contact 41 and the second static contact 42. When the present application is in the first working position, one end of the moving contact 30 is clamped and connected to the first static contact 41, and the other end is contacted and connected to the second static contact 42. In this way, the soft connecting wire can be eliminated. Compared with the existing load switch conductive circuit using a soft connecting wire, the load switch of the present application can shorten the length of the conductive circuit. In this way, the contact resistance can be reduced, the cost of the load switch can be reduced, and the soft connecting wire will not become hard and easy to break in a high temperature environment, thereby improving the service life of the conductive circuit.

[0042] In this embodiment, when the load switch is in the second working position, the moving contact 30 is disengaged from the first static contact 41 to disconnect the first static contact 41 and the second static contact 42 , which can be achieved in either of the following two ways.

[0043] For example, in a feasible implementation, the movable contact 30 is slidably connected to the housing 10. In this way, the movable contact 30 can be driven to slide on the housing 10 so that the movable contact 30 is connected between the first static contact 41 and the second static contact 42, thereby connecting the first static contact 41 and the second static contact 42, so that the load switch is in the first working position; or the movable contact 30 can be driven to slide on the housing 10 so that the movable contact 30 is disengaged from the first static contact 41 and the second static contact 42, thereby disconnecting the first static contact 41 and the second static contact 42, so that the load switch is in the second working position.

[0044] For another example, in another feasible implementation, the movable contact 30 is optionally rotatably connected to the housing 10. In this way, by driving the movable contact 30 to rotate, one end of the movable contact 30 can be clamped and connected to the first static contact 41 and the other end can be in contact with and connected to the second static contact 42; or the movable contact 30 can be disconnected from the first static contact 41 and the second static contact 42.

[0045] In addition, it should be noted that when the moving contact 30 is rotatably connected to the housing 10, the rotation center of the moving contact 30 can be located in the middle of the moving contact 30 or at one end of the moving contact 30. When the rotation center of the moving contact 30 is located in the middle of the moving contact 30, the moving contact 30 is driven to rotate, and both ends of the moving contact 30 can be connected to or separated from the first static contact 41 and the second static contact 42 at the same time; when the rotation center of the moving contact 30 is located at one end of the moving contact 30, one end of the moving contact 30 (the end with the rotation center) can be connected to the second static contact 42 all the time, and the other end can be connected to or separated from the first static contact 41 in the driven state, as shown in FIG. Figure 2 and Figure 6 shown.

[0046] Please refer to Figure 2 and Figure 5 Optionally, the load switch further includes a contact support 60, which includes a first body 61 having an accommodating cavity 611 and a first connecting portion 62 protruding from the outer wall of the first body 61; the moving contact 30 is partially inserted into the accommodating cavity 611, the first body 61 is rotatably connected to the housing 10, and the first connecting portion 62 is drivingly connected to the driving mechanism 20; the driving mechanism 20 drives the contact 30 to support movement, and the contact support 60 can drive the moving contact 30 to switch between the first working position and the second working position.

[0047] Also, please refer to Figure 5 As shown, the contact support 60 may further include a second connection portion 63 connected to the accommodating cavity 611, and the second connection portion 63 is position-limitedly connected to the movable contact 30. Of course, in other embodiments, the second connection portion 63 may not be provided, and other methods may be used to positionally connect the movable contact 30 to the accommodating cavity 611, and this application is not limited thereto.

[0048] It should be noted that the first connecting portion 62 is protruding from the outer wall of the first body 61, and the second connecting portion 63 is disposed within the accommodating cavity 611 of the first body 61. The second connecting portion 63 can be positionally connected to the movable contact 30, so that the movable contact 30 can be restrained by the second connecting portion 63. In this embodiment, the end of the movable contact 30 closest to the first static contact 41 extends from the accommodating cavity 611.

[0049] The first body 61 is rotatably connected to the shell 10, so that the driving mechanism 20 can drive the first body 61 to rotate through the first connecting part 62. The rotation of the first body 61 can cause the moving contact 30 to rotate, and then the first static contact 41 and the second static contact 42 can be connected or disconnected through the moving contact 30, so that the load switch can switch between the first working position and the second working position.

[0050] Furthermore, in this embodiment, the drive mechanism 20 can be connected to the first connecting portion 62 via a transmission member 22. One end of the transmission member 22 is movably connected to the first connecting portion 62, and the other end is movably connected to the armature 212 of the drive mechanism 20. This application does not limit the structural form of the drive mechanism 20, and those skilled in the art can select a suitable drive mechanism 20 as needed.

[0051] Please refer to Figure 2 and Figure 3 Optionally, one end of the moving contact 30 maintains contact connection with the second static contact 42, and the moving contact 30 is driven to rotate relative to the second static contact 42. In this embodiment, the rotation center of the moving contact 30 is located at the end thereof that is in contact connection with the second static contact 42. In this way, one end of the moving contact 30 is always in contact connection with the second static contact 42. In this way, it is only necessary to maintain the alignment relationship between the first static contact 41 and the moving contact 30. Compared with the two ends of the moving contact 30 needing to connect the first static contact 41 and the second static contact 42 respectively when closing the switch, and needing to disconnect the first static contact 41 and the second static contact 42 respectively when opening the switch, this setting method of the present application has lower requirements on the assembly accuracy of the load switch.

[0052] In addition, in order to facilitate the load switch to open quickly when opening and improve the opening speed, please refer to Figure 1 and Figure 2 The load switch also includes a return spring 70, one end of which is fixed relative to the housing 10 and the other end abuts the contact support 60. The return spring 70 has a tendency to drive the contact support 30 to move toward the second working position. By providing the return spring 70, the present application can provide a driving force to the contact support 60 from the first working position to the second working position when opening is required, thereby enabling the contact support 60 to switch to the second working position more quickly and improving the breaking capacity.

[0053] It should be noted that, in the first working position, the contact support 60 compresses the reset spring 70, so that the reset spring 70 stores energy when the switch is closed; thus, when the switch is opened, the reset spring 70 can drive the contact support 30 to rotate under the action of energy release.

[0054] Please refer to Figure 2 and Figure 5 Optionally, the first connecting portion 62 is located on a side of a first plane facing away from the second stationary contact 42. The first plane is formed by the length and width of the movable contact 30. In other words, the first connecting portion 62 is located on one side of the first plane, while the second stationary contact 42 is located on the other side of the first plane. This ensures that the drive mechanism 20 driving the contact support 60 does not interfere with the second stationary contact 42, resulting in a more rational layout structure for the load switch.

[0055] Also, in this embodiment, optionally, when the load switch is in the first working position, there is a first angle α between the moving contact 30 and the lead-out row 50; when the load switch is in the second working position, there is a second angle β between the moving contact 30 and the lead-out row 50, and the first angle α is smaller than the second angle β; and the moving contact 30 is located on the same side of the lead-out row 50 when it is in the first working position and when it is in the second working position.

[0056] Please refer to Figure 6 When the load switch is in the first operating position, the angle between the movable contact 30 and the lead strip 50 is a first angle α. When the movable contact 30 is in the second operating position, the movable contact 30 is the dotted line portion, and the angle between it and the lead strip 50 is a second angle β. This shortens the required length of the first stationary contact 41, making the overall length of the load switch's conductive circuit shorter.

[0057] It should be noted that the angle between the moving contact 30 and the lead-out row 50 refers to the angle between the axis direction of the moving contact 30 and the current lead-out direction of the lead-out row 50 (i.e. Figure 6 The angle between ).

[0058] In this embodiment, the movable contact 30 is located on the same side of the lead row 50 when it is in the first working position and when it is in the second working position, so that the space occupied by the movable contact 30 is further reduced.

[0059] Please refer to Figure 4 In this embodiment, the first static contact 41 may include a second body 411, a protrusion 412 connected to the second body 411, and an arc-striking arm 413 connected to the second body 411; the protrusion 412 is protruding from the side of the second body 411 close to the moving contact 30, and the arc-striking arm 413 extends from the protrusion 412 toward the side away from the moving contact 30; the moving contact 30 has a clamping portion 31 at one end close to the first static contact 41, and the clamping portion 31 can clamp the protrusion 412, and the arc-striking arm 413 is located on one side of the arc extinguishing chamber 80 of the load switch.

[0060] That is, the first stationary contact 41 is inserted into the clamping portion 31 of the moving contact 30 through the protrusion 412 , so as to achieve a clamping connection between the first stationary contact 41 and the moving contact 30 .

[0061] In addition, it should be noted that the above-mentioned arc-striking arm 413 can also play a role in guiding the arc. Through the setting of the arc-striking arm 413, the arc can enter the arc extinguishing chamber 80 along the arc-striking arm 413, thereby achieving rapid arc extinguishing.

[0062] Alternatively, see Figure 2The driving mechanism 20 includes an electromagnetic system 21 and a transmission member 22; the electromagnetic system 21 includes a coil assembly 211, an armature 212 and a yoke 213, the yoke 213 has a connecting end and a mounting end, the coil assembly 211 is connected to the connecting end, the armature 212 is rotatably connected to the mounting end, and the armature 212 is driven and connected to the contact support 60 through the transmission member 22; the coil assembly 211 is energized to drive the armature 212 to rotate to drive the transmission member 22 to move, so that the transmission member 22 drives the contact support 60 to switch between the first working position and the second working position.

[0063] In this embodiment, a permanent magnet may be provided on the armature 212. Through the magnetic attraction of the permanent magnet, the magnet on the armature 212 is fit with the yoke 213 and maintained in the normally open or normally closed state of the corresponding moving contact 30. When triggered by a pulse electrical signal, the closed magnetic flux generated by the coil assembly 211 in the electromagnetic system 21 is opposite to the direction of the permanent magnet, so that the originally fitted magnet and the yoke 213 form reverse magnetic poles, driving the armature 212 to rotate clockwise or counterclockwise. The armature 212 can drive the contact support 60 to move through the cooperation of the transmission member 22 and the first connecting part 62, thereby realizing the state switching of the moving contact 30.

[0064] Of course, the driving form of the driving mechanism 20 is only an example and is not a limitation to the present application. In other embodiments, other driving modes may also be used for driving.

[0065] Furthermore, in this embodiment, when the drive mechanism 20 includes the electromagnetic system 21, the first static contact 41, the movable contact 30, and the electromagnetic system 21 are arranged sequentially along a first direction a, and the first static contact 41 and the arc extinguishing chamber 80 are arranged along a second direction b, with the first direction a being perpendicular to the second direction b. Through the above-described arrangement of components, the present application can make the internal space layout of the load switch more compact and reasonable.

[0066] Furthermore, when the drive mechanism 20 includes the electromagnetic system 21, the distance between the electromagnetic system 21 and the central axis of the meter is less than the distance between the movable contact 30 and the central axis of the meter (the central axis of the meter herein refers to the centerline perpendicular to the sidewalls of the meter terminals). Thus, the electromagnetic system 21 is closer to the center of the meter than the movable contact 30, making the electromagnetic system 21 farther from the sidewalls of the meter. This arrangement prevents any magnetic sources outside the meter from affecting the normal operation of the electromagnetic system 21, ensuring stable and reliable operation of the load switch.

[0067] Another aspect of the present invention provides an electric meter comprising the aforementioned load switch, which is installed within the meter. Furthermore, the load switch is electrically connected to the meter terminals via a lead bar 50 or the like. The specific structure and technical effects of the load switch have been previously described and explained in detail, and therefore will not be further elaborated upon here. The inclusion of the aforementioned load switch in the electric meter eliminates the need for flexible connecting wires, shortens the length of the conductive circuit, and improves the life of the conductive circuit.

[0068] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0069] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A load switch, characterized in that: The invention comprises a housing (10), and a driving mechanism (20), a moving contact (30), a first static contact (41), a second static contact (42), and a lead-out row (50) respectively connected to the housing (10), wherein the driving mechanism (20) is drivingly connected to the moving contact (30), and the second static contact (42) is connected to the lead-out row (50); The driving mechanism (20) drives the moving contact (30) to move to a first working position, one end of the moving contact (30) is clamped and connected to the first static contact (41) and the other end is in contact and connected to the second static contact (42); the driving mechanism (20) drives the moving contact (30) to move to a second working position, the moving contact (30) is disengaged from the first static contact (41), so that the first static contact (41) and the second static contact (42) are disconnected.

2. The load switch according to claim 1, characterized in that: The load switch further includes a contact support (60), wherein the contact support (60) includes a first body (61) having an accommodating cavity (611) and a first connecting portion (62) protruding from the outer wall of the first body (61); the movable contact (30) is partially inserted into the accommodating cavity (611), the first body (61) is rotatably connected to the housing (10), and the first connecting portion (62) is drivably connected to the driving mechanism (20); the driving mechanism (20) drives the contact support (60) to move, and the contact support (60) can drive the movable contact (30) to switch between the first working position and the second working position.

3. The load switch according to claim 2, characterized in that: One end of the movable contact (30) maintains contact connection with the second stationary contact (42), and the movable contact (30) is driven to rotate relative to the second stationary contact (42).

4. The load switch according to claim 2, characterized in that: The load switch further comprises a reset spring (70), one end of which is relatively fixed to the housing (10) and the other end of which is in contact with the contact support (60); the reset spring (70) has a tendency to drive the contact support (60) to move toward the second working position.

5. The load switch according to claim 2, characterized in that: The first connecting portion (62) is located on a side of a first plane away from the second static contact (42), and the first plane is a plane formed by the length direction of the moving contact (30) and the width direction of the moving contact (30).

6. The load switch according to claim 1, characterized in that: When the load switch is in the first working position, a first angle (α) is formed between the moving contact (30) and the lead-out row (50); when the load switch is in the second working position, a second angle (β) is formed between the moving contact (30) and the lead-out row (50), and the first angle (α) is smaller than the second angle (β); and the moving contact (30) is located on the same side of the lead-out row (50) when it is in the first working position and when it is in the second working position.

7. The load switch according to claim 2, characterized in that: The first static contact (41) comprises a second body (411), a protrusion (412) connected to the second body (411), and an arc-striking arm (413) connected to the second body (411); the protrusion (412) is protruding from a side of the second body (411) close to the moving contact (30), and the arc-striking arm (413) extends from the protrusion (412) toward a side away from the moving contact (30); the moving contact (30) has a clamping portion (31) at one end close to the first static contact (41), and the clamping portion (31) is capable of clamping the protrusion (412); the arc-striking arm (413) is located on one side of the arc-extinguishing chamber (80) of the load switch; And / or, the driving mechanism (20) includes an electromagnetic system (21) and a transmission member (22); the electromagnetic system (21) includes a coil assembly (211), an armature (212) and a yoke (213); the yoke (213) has a connection end and a mounting end; the coil assembly (211) is connected to the connection end; the armature (212) is rotatably connected to the mounting end; and the armature (212) is drive-connected to the contact support (60) through the transmission member (22); the coil assembly (211) is energized to drive the armature (212) to rotate to drive the transmission member (22) to move, so that the transmission member (22) drives the contact support (60) to switch between the first working position and the second working position.

8. The load switch according to claim 7, characterized in that: When the driving mechanism (20) includes an electromagnetic system (21), the first static contact (41), the moving contact (30) and the electromagnetic system (21) are arranged in sequence along a first direction (a), and the first static contact (41) and the arc extinguishing chamber (80) are arranged along a second direction (b), and the first direction (a) and the second direction (b) are perpendicular.

9. The load switch according to claim 7, characterized in that: When the driving mechanism (20) includes an electromagnetic system (21), the distance between the electromagnetic system (21) and the central axis of the electric meter is smaller than the distance between the moving contact (30) and the central axis of the electric meter.

10. An electric meter, characterized in that: The load switch comprises the load switch according to any one of claims 1 to 9, wherein the load switch is installed in an electric meter housing.

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