Load switch and electricity meter

Abstract

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

[0002] Load switches are the main components of modern smart meters. They are control elements that use the interaction and relative motion of electromagnetic coils and permanent magnets to close and open contact mechanisms under the action of drive control signals, and can maintain the on or off state even after the drive control signal disappears.

[0003] A load switch mainly consists of a stationary contact, a moving contact, and a drive mechanism. The drive mechanism drives the moving contact to open and close the circuit with the stationary contact, thereby connecting or disconnecting the conductive line. Existing load switches typically use flexible connecting wires for the conductive line. However, this method has several drawbacks: long path length, high contact resistance, and high cost. Furthermore, the flexible connecting wire is prone to hardening and breakage at high temperatures, affecting the lifespan of the conductive line. Therefore, providing a new load switch that addresses the problems of long conductive line lengths and short lifespans in existing technologies is both important and meaningful. Summary of the Invention

[0004] The purpose of this invention is to provide a load switch and an electricity meter that can shorten the length of the conductive line and improve the lifespan of the conductive line.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In one aspect, the present invention provides a load switch comprising a housing, and a drive mechanism, a moving contact, a first stationary contact, a second stationary contact, and a lead-out bar respectively connected to the housing. The drive mechanism and the moving contact are driven together, and the second stationary contact is connected to the lead-out bar. The drive mechanism drives the moving contact to a first operating position, wherein one end of the moving contact is clamped and connected to the first stationary contact, and the other end is in contact with the second stationary contact. The drive mechanism then drives the moving contact to a second operating position, whereby the moving contact disengages from the first stationary contact, thereby disconnecting the first and second stationary contacts. This load switch can shorten the length of the conductive line and improve the lifespan of the conductive line.

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

[0008] Optionally, the load switch further includes a contact support, which includes a first body having a receiving cavity and a first connecting portion protruding from the outer wall of the first body; the moving contact portion passes through the receiving cavity, the first body is rotatably connected to the housing, and the first connecting portion is drivenly connected to the drive mechanism; the drive mechanism drives the contact support to move, and the contact support can drive the moving contact to switch between a first working position and a second working position.

[0009] Optionally, one end of the moving contact is kept in contact with the second stationary contact, and the moving contact can be driven to rotate relative to the second stationary contact.

[0010] Optionally, the load switch also includes a reset spring, one end of which is fixed relative to the housing and the other end of which abuts against the contact support; the reset spring has a tendency to drive the contact support to move to the second working position.

[0011] Optionally, the first connecting portion is located on the side of the first plane away from the second stationary contact, and the first plane is the 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 operating position, there is a first angle between the moving contact and the lead-out bar; when the load switch is in the second operating position, there is a second angle between the moving contact and the lead-out bar, and the first angle is smaller than the second angle; and the moving contact is located on the same side of the lead-out bar in both the first operating position and the second operating position.

[0013] Optionally, the first stationary contact includes a second body, a protrusion connected to the second body, and an arc-starting arm connected to the second body; the protrusion protrudes from the second body on the side near the moving contact, and the arc-starting arm extends from the protrusion toward the side away from the moving contact; the moving contact has a clamping portion at the end near the first stationary contact, which can clamp the protrusion, and the arc-starting 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 component; the electromagnetic system includes a coil assembly, an armature, and a yoke, the yoke having a connecting end and a mounting end, the coil assembly being connected to the connecting end, the armature being rotatably connected to the mounting end, and the armature being connected to the contact support drive via the transmission component; the coil assembly being energized can drive the armature to rotate to drive the transmission component to move, so that the transmission component drives the contact to support switching between the first working position and the second working position.

[0014] Optionally, when the driving mechanism includes an electromagnetic system, the first stationary contact, the moving contact, and the electromagnetic system are arranged sequentially along a first direction, and the first stationary contact and the arc-extinguishing chamber are arranged along a second direction, with the first and second directions being perpendicular.

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

[0016] In another aspect, the present invention provides an electricity meter that includes the above-described load switch, the load switch being installed inside the meter housing.

[0017] The beneficial effects of this invention include:

[0018] The load switch provided in this application includes a housing, and a drive mechanism, a moving contact, a first stationary contact, a second stationary contact, and a lead-out bar respectively connected to the housing. The drive mechanism and the moving contact are driven together, and the second stationary contact is connected to the lead-out bar. The drive mechanism drives the moving contact to a first working position, where one end of the moving contact is clamped and connected to the first stationary contact, and the other end is in contact with the second stationary contact. The drive mechanism then drives the moving contact to a second working position, where the moving contact disengages from the first stationary contact, thereby disconnecting the first and second stationary contacts. In the first working position, by clamping and connecting one end of the moving contact to the first stationary contact and contacting the other end to the second stationary contact, the flexible connecting wire can be eliminated. Compared to existing load switches that use flexible connecting wires in their conductive circuits, the load switch of this application can shorten the length of the conductive circuit, thereby reducing contact resistance, reducing the cost of the load switch, and preventing the flexible connecting wire from hardening and breaking easily at high temperatures, thus improving the service life of the conductive circuit. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a load switch provided in an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the load switch after removing the housing;

[0022] Figure 3 A schematic diagram of the structure of the first stationary contact, the moving contact, the second stationary contact, the contact support, and the lead-out bar provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the first stationary contact provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the moving contact and contact support provided in an embodiment of the present invention;

[0025] Figure 6This is a schematic diagram of the structure of the first stationary contact, the moving contact, the second stationary contact, and the lead-out bar provided in an embodiment of the present invention.

[0026] Icons: 10-Housing; 20-Drive mechanism; 21-Electromagnetic system; 211-Coil assembly; 212-Armature; 213-Yoke; 22-Transmission component; 30-Moving contact; 31-Clamping part; 41-First stationary contact; 411-Second body; 412-Protrusion; 413-Arc-starting arm; 42-Second stationary contact; 50-Lead-out bar; 60-Contact support; 61-First body; 611-Accommodating cavity; 62-First connecting part; 63-Second connecting part; 70-Reset spring; α-First included angle; β-Second included angle; 80-Arc-extinguishing chamber; a-First direction; b-Second direction. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Please refer to Figure 1 and Figure 2 This embodiment provides a load switch, which includes a housing 10, and a drive mechanism 20, a moving contact 30, a first stationary contact 41, a second stationary contact 42, and a lead-out bar 50, all connected to the housing 10. The drive mechanism 20 and the moving contact 30 are driven together, and the second stationary contact 42 is connected to the lead-out bar 50. The drive mechanism 20 drives the moving contact 30 to a first working position, where one end of the moving contact 30 is clamped and connected to the first stationary contact 41, and the other end is in contact with the second stationary contact 42. The drive mechanism 20 then drives the moving contact 30 to a second working position, where the moving contact 30 disengages from the first stationary contact 41, thereby disconnecting the first stationary contact 41 and the second stationary contact 42. This load switch can shorten the length of the conductive line and improve the lifespan of the conductive line.

[0034] It should be noted that the load switch of this application includes a housing 10, a drive mechanism 20, a moving contact 30, a first stationary contact 41, a second stationary contact 42, and a lead-out bar 50. Among them, the drive mechanism 20, the moving contact 30, the first stationary contact 41, the second stationary contact 42, and the lead-out bar 50 are at least partially located inside the housing 10.

[0035] In this embodiment, the driving mechanism 20 is driven to connect with the moving contact 30, and can drive the moving contact 30 to move within the housing 10, so that the moving contact 30 connects the first stationary contact 41 and the second stationary contact 42, or causes the moving contact 30 to disconnect the first stationary contact 41 and the second stationary contact 42.

[0036] It should be noted that the moving contact 30 has two working positions: a first working position and a 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 stationary contact 41, and the other end is connected to the second stationary contact 42. The end of the second stationary contact 42 away from the moving contact 30 is connected to the lead-out bar 50. In the second working position, one end of the moving contact 30 is disconnected from the first stationary contact 41 (the other end of the moving contact 30 can be disconnected from or connected to the second stationary contact 42), and the end of the second stationary contact 42 away from the moving contact 30 is connected to the lead-out bar 50.

[0037] Furthermore, in this embodiment, the second stationary contact 42 and the lead-out bar 50 can be integrally formed. In this way, the second stationary contact 42 and the lead-out bar 50 can be used as a single component, which can simplify the assembly and 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 this application, when the circuit is closed, one end of the moving contact 30 is clamped and connected to the first stationary contact 41, and the other end is in contact with the second stationary contact 42. In this way, compared with the prior art which uses a flexible connecting wire to connect the stationary contact plate and the moving contact 30, and drives the moving contact 30 to move so that the moving contact 30 and the stationary contact make contact to achieve opening or closing, the connection method of the moving contact 30 in this application (when closing, one end of the moving contact 30 is clamped and connected to the first stationary contact 41, and the other end is in contact with the second stationary contact 42; when opening, the moving contact 30 is disconnected from the first stationary contact 41) can eliminate the need for a flexible connecting wire. This can shorten the length of the conductive line and improve the life of the conductive line.

[0039] In this embodiment, when the load switch is in the first operating position, the first stationary contact 41, the moving contact 30, the second stationary contact 42, and the lead-out bar 50 are sequentially connected to form a conductive line; when in the second operating position, the moving contact 30 disengages from the first stationary contact 41, and the conductive line is disconnected.

[0040] Additionally, it should be noted that, optionally, please refer to the following: Figure 2 , Figure 4 and Figure 5 As shown, the first stationary contact 41 and the moving contact 30 are clamped together. The method of clamping connection is not specifically limited in this application; it can be that the first stationary contact 41 clamps the moving contact 30, or the moving contact 30 clamps the first stationary contact 41.

[0041] In summary, the load switch provided in this application includes a housing 10, and a drive mechanism 20, a moving contact 30, a first stationary contact 41, a second stationary contact 42, and a lead-out bar 50, all connected to the housing 10. The drive mechanism 20 and the moving contact 30 are driven together, and the second stationary contact 42 is connected to the lead-out bar 50. The drive mechanism 20 drives the moving contact 30 to a first working position, where one end of the moving contact 30 is clamped and connected to the first stationary contact 41, and the other end is in contact with the second stationary contact 42. The drive mechanism 20 drives the moving contact 30 to a second working position, where the moving contact 30 disengages from the first stationary contact 41, thereby disconnecting the first stationary contact 41 and the second stationary contact 42. In the first working position, this application clamps and connects one end of the moving contact 30 to the first stationary contact 41, and the other end is connected to the second stationary contact 42. This eliminates the need for a flexible connecting wire. Compared with the existing load switch solution that uses a flexible connecting wire for the conductive circuit, the load switch of this application can shorten the length of the conductive circuit. This reduces contact resistance and the cost of the load switch, and avoids the phenomenon that the flexible connecting wire hardens and breaks easily in high temperature environments, thereby improving the service life of the conductive circuit.

[0042] In this embodiment, when the load switch is in the second operating position, the moving contact 30 disengages from the first stationary contact 41, thereby disconnecting the first stationary contact 41 and the second stationary contact 42. This can be achieved by either of the following two methods.

[0043] For example, in one feasible implementation, the moving contact 30 is slidably connected to the housing 10. This allows the moving contact 30 to slide on the housing 10, connecting it between the first stationary contact 41 and the second stationary contact 42, thereby connecting the first stationary contact 41 and the second stationary contact 42 to place the load switch in a first operating position; or, the moving contact 30 can be driven to slide on the housing 10, disengaging it from the first stationary contact 41 and the second stationary contact 42, thereby disconnecting the first stationary contact 41 and the second stationary contact 42 to place the load switch in a second operating position.

[0044] For example, in another feasible implementation, the moving contact 30 may optionally be rotatably connected to the housing 10. In this way, driving the moving contact 30 to rotate can cause one end of the moving contact 30 to clamp and connect to the first stationary contact 41 and the other end to contact and connect to the second stationary contact 42; or cause the moving contact 30 to disconnect the connection between the first stationary contact 41 and the second stationary contact 42.

[0045] Additionally, 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 either in the middle or at one end of the moving contact 30. Specifically, when the rotation center of the moving contact 30 is located in the middle, driving the moving contact 30 to rotate allows both ends of the moving contact 30 to simultaneously connect or disconnect from the first stationary contact 41 and the second stationary contact 42, respectively. When the rotation center of the moving contact 30 is located at one end, one end of the moving contact 30 (the end with the rotation center) can be continuously connected to the second stationary contact 42, while the other end, under driven conditions, can connect or disconnect from the first stationary contact 41, as shown below. Figure 2 and Figure 6 As shown.

[0046] Please refer to Figure 2 and Figure 5 Optionally, the load switch also includes a contact support 60, which includes a first body 61 having a receiving 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 receiving cavity 611, the first body 61 is rotatably connected to the housing 10, and the first connecting portion 62 is drivenly connected to the drive mechanism 20; the drive mechanism 20 drives the contact 30 to support the movement, and the contact support 60 can drive the moving contact 30 to switch between a first working position and a second working position.

[0047] Also, please refer to Figure 5 As shown, the contact support 60 may further include a second connecting portion 63 connected within the receiving cavity 611, the second connecting portion 63 being limitedly connected to the moving contact 30. Of course, in other embodiments, the second connecting portion 63 may not be provided, and other methods may be used to limit the moving contact 30 to be connected within the receiving cavity 611; this application does not impose any restrictions on this.

[0048] It should be noted that the first connecting part 62 protrudes from the outer wall of the first body 61, and the second connecting part 63 is disposed within the receiving cavity 611 of the first body 61. The second connecting part 63 can limit the connection of the moving contact 30, so that the moving contact 30 can be confined within the second connecting part 63. In this embodiment, the end of the moving contact 30 near the first stationary contact 41 extends out from the receiving cavity 611.

[0049] The first body 61 is rotatably connected to the housing 10. In this way, the drive 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, thereby allowing the first stationary contact 41 and the second stationary contact 42 to 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 is in contact with the second stationary contact 42, and the moving contact 30 can be driven to rotate relative to the second stationary contact 42. In this embodiment, the rotation center of the moving contact 30 is located at the end in contact with the second stationary contact 42. In this way, one end of the moving contact 30 is always in contact with the second stationary contact 42. Thus, it is only necessary to maintain the alignment relationship between the first stationary contact 41 and the moving contact 30. Compared to the requirement that the two ends of the moving contact 30 need to be connected to the first stationary contact 41 and the second stationary contact 42 respectively when closing, and disconnected from the first stationary contact 41 and the second stationary contact 42 respectively when opening, this arrangement of the present application has lower requirements for the assembly accuracy of the load switch.

[0052] Furthermore, to facilitate rapid tripping of the load switch and improve the tripping speed, optionally, please refer to... Figure 1 and Figure 2 The load switch also includes a reset spring 70, one end of which is fixed relative to the housing 10, and the other end abuts against the contact support 60. The reset spring 70 has a tendency to drive the contact support 30 to move towards the second operating position. By providing the reset spring 70, this application ensures that when tripping is required, the reset spring 70 can provide a driving force to the contact support 60 from the first operating position to the second operating position, thereby making the switching of the contact support 60 to the second operating position faster and improving the breaking capacity.

[0053] It should be noted that in the first working position, the contact support 60 will compress the reset spring 70, so that the reset spring 70 stores energy when the circuit is closed; in this way, when the circuit 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 the side of the first plane opposite to the second stationary contact 42. The first plane is the plane formed by the length direction and the width direction of the moving contact 30. That is, the first connecting portion 62 is located on one side of the first plane, and the second stationary contact 42 is located on the other side of the first plane. In this way, the driving mechanism 20 will not interfere with the second stationary contact 42 when driving the contact support 60, and the layout structure of the load switch is more reasonable.

[0055] Furthermore, in this embodiment, optionally, when the load switch is in the first operating position, the moving contact 30 and the lead-out bar 50 have a first included angle α; when the load switch is in the second operating position, the moving contact 30 and the lead-out bar 50 have a second included angle β, the first included angle α being smaller than the second included angle β; and the moving contact 30 is located on the same side of the lead-out bar 50 in both the first operating position and the second operating position.

[0056] Please refer to Figure 6 When the load switch is in the first operating position, the angle between the moving contact 30 and the lead-out bar 50 is the first included angle α; when the moving contact 30 is in the second operating position, the moving contact 30 is the dashed part, and the angle between it and the lead-out bar 50 is the second included angle β. In this way, the required length of the first stationary contact 41 can be shortened, making the overall length of the conductive line of the load switch shorter.

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

[0058] In this embodiment, the moving contact 30 is on the same side of the lead-out bar 50 when it is in the first working position and when it is in the second working position, which further reduces the space required by the moving contact 30.

[0059] Please refer to Figure 4 In this embodiment, the first stationary contact 41 may include a second body 411, a protrusion 412 connected to the second body 411, and an arc-starting arm 413 connected to the second body 411. The protrusion 412 protrudes from the second body 411 on the side near the moving contact 30, and the arc-starting arm 413 extends from the protrusion 412 toward the side away from the moving contact 30. The moving contact 30 has a clamping part 31 at one end near the first stationary contact 41, which can clamp the protrusion 412. The arc-starting 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 part 31 of the moving contact 30 through the protrusion 412 to achieve the clamping connection between the first stationary contact 41 and the moving contact 30.

[0061] Furthermore, it should be noted that the aforementioned arc-initiating arm 413 can also guide the electric arc. By setting the arc-initiating arm 413, the electric arc can enter the arc-extinguishing chamber 80 along the arc-initiating arm 413, thereby achieving rapid arc extinguishing.

[0062] Alternatively, please refer to Figure 2The drive mechanism 20 includes an electromagnetic system 21 and a transmission component 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, and the armature 212 is rotatably connected to the mounting end. The armature 212 is driven to the contact support 60 via the transmission component 22. When the coil assembly 211 is energized, it can drive the armature 212 to rotate, thereby driving the transmission component 22 to move, so that the transmission component 22 drives the contact support 60 to switch between a first working position and a 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 and the yoke 213 are kept in contact and in the normally open or normally closed state of the corresponding moving contact 30. 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 contacted magnet and the yoke 213 form opposite 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 described above is only an example and is not a limitation of this application. In other embodiments, other driving methods can also be used.

[0065] Furthermore, in this embodiment, when the drive mechanism 20 includes an electromagnetic system 21, the first stationary contact 41, the moving contact 30, and the electromagnetic system 21 are arranged sequentially along the first direction a, and the first stationary contact 41 and the arc-extinguishing chamber 80 are arranged along the second direction b, with the first direction a and the second direction b being perpendicular. This application, through the aforementioned arrangement of components, enables a more compact and rational internal space layout for the load switch.

[0066] Furthermore, when the drive mechanism 20 includes an electromagnetic system 21, the distance from the electromagnetic system 21 to the central axis of the meter is less than the distance from the moving contact 30 to the central axis of the meter (here, the central axis of the meter refers to the center line perpendicular to the side wall of the meter's terminals). This places the electromagnetic system 21 closer to the center of the meter than the moving contact 30, resulting in a greater distance between the electromagnetic system 21 and the side wall of the meter. This arrangement prevents external magnetic sources from affecting the normal operation of the electromagnetic system 21, ensuring the load switch can operate stably and reliably.

[0067] In another aspect, the present invention provides an electricity meter including the aforementioned load switch, which is installed inside the meter. Furthermore, the load switch is electrically connected to the meter's terminals via a lead-out pin 50, etc. The specific structure and technical effects of the load switch have been described in detail above, and therefore will not be repeated here. Because the meter includes the aforementioned load switch, the flexible connecting wire can be eliminated, shortening the length of the conductive line and increasing its lifespan.

[0068] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope 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 suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A load switch, characterized in that, It includes a housing (10), and a drive mechanism (20), a moving contact (30), a first stationary contact (41), a second stationary contact (42), and a lead-out bar (50) respectively connected to the housing (10). The drive mechanism (20) and the moving contact (30) are drivenly connected, and the second stationary contact (42) and the lead-out bar (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 stationary contact (41), and the other end is in contact with the second stationary contact (42). The driving mechanism (20) drives the moving contact (30) to move to the second working position. The moving contact (30) disengages from the first stationary contact (41) so that the first stationary contact (41) and the second stationary contact (42) are disconnected.

2. The load switch according to claim 1, characterized in that, The load switch further includes a contact support (60), which includes a first body (61) having a receiving cavity (611) and a first connecting part (62) protruding from the outer wall of the first body (61); the moving contact (30) is partially inserted into the receiving cavity (611); the first body (61) is rotatably connected to the housing (10); and the first connecting part (62) is driven to be 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 moving 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 moving contact (30) is in contact with the second stationary contact (42), and the moving contact (30) can be driven to rotate relative to the second stationary contact (42).

4. The load switch according to claim 2, characterized in that, The load switch also includes a reset spring (70), one end of which is fixed relative to the housing (10) and the other end abuts against 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 part (62) is located on the side of the first plane away from the second stationary contact (42), and the first plane is the 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 operating position, the moving contact (30) and the lead-out bar (50) have a first included angle (α); when the load switch is in the second operating position, the moving contact (30) and the lead-out bar (50) have a second included angle (β), the first included angle (α) being smaller than the second included angle (β); and the moving contact (30) is located on the same side of the lead-out bar (50) in both the first operating position and the second operating position.

7. The load switch according to claim 2, characterized in that, The first stationary contact (41) includes a second body (411), a protrusion (412) connected to the second body (411), and an arc-starting arm (413) connected to the second body (411); the protrusion (412) protrudes from the second body (411) on the side near the moving contact (30), and the arc-starting arm (413) extends from the protrusion (412) toward the side away from the moving contact (30); the moving contact (30) has a clamping part (31) at one end near the first stationary contact (41), and the clamping part (31) can clamp the protrusion (412); the arc-starting arm (413) is located on one side of the arc-extinguishing chamber (80) of the load switch; And / or, the drive mechanism (20) includes an electromagnetic system (21) and a transmission component (22); the electromagnetic system (21) includes a coil assembly (211), an armature (212) and a yoke (213), the yoke (213) having a connecting end and a mounting end, the coil assembly (211) being connected to the connecting end, the armature (212) being rotatably connected to the mounting end, and the armature (212) being driven to the contact support (60) via the transmission component (22); the coil assembly (211) being energized can drive the armature (212) to rotate to drive the transmission component (22) to move, so that the transmission component (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 drive mechanism (20) includes an electromagnetic system (21), the first stationary contact (41), the moving contact (30) and the electromagnetic system (21) are arranged in sequence along a first direction (a), and the first stationary contact (41) and the arc-extinguishing chamber (80) are arranged along a second direction (b), with the first direction (a) and the second direction (b) being perpendicular.

9. The load switch according to claim 7, characterized in that, When the drive mechanism (20) includes an electromagnetic system (21), the distance from the electromagnetic system (21) to the central axis of the meter is less than the distance from the moving contact (30) to the central axis of the meter.

10. An electricity meter, characterized in that, The load switch includes any one of claims 1 to 9, wherein the load switch is installed inside the meter housing.

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