Relay and meter

Abstract

The application relates to a relay and an electric meter, the electric meter comprising a relay, the relay comprising a magnetic circuit part and a contact part, the magnetic circuit part comprising a coil holder and a coil wound on the coil holder, a central axis of the coil holder extending along a first direction, the contact part being arranged on one side of the magnetic circuit part along a second direction perpendicular to the first direction, the contact part comprising a contact assembly, the contact assembly comprising a moving contact piece provided with a moving contact point and a stationary contact piece provided with a stationary contact point, the moving contact piece being capable of swinging along the first direction under the drive of the magnetic circuit part to make the moving contact point contact or separate from the stationary contact point, so that the magnetic circuit part does not occupy the swinging space of the moving contact piece, thereby making the moving contact piece capable of swinging in a larger swinging space, so that the stationary contact point and the moving contact point can keep a sufficient distance in the separated state, thereby making the stationary contact point and the moving contact point have a larger electrical gap therebetween, and meeting the use scene of a large current.

Description

Technical Field

[0001] This application relates to the field of electronic control device technology, and in particular to a relay and a meter. Background Technology

[0002] A relay is an electronic switch that connects and disconnects a load circuit. Among the many types of relays, the magnetic latching relay is a common one. It consists of a contact part and a magnetic circuit part. The contact part includes a moving spring with a moving contact and a stationary spring with a stationary contact. The magnetic circuit part contains a coil and an armature. When a positive pulse voltage is applied to the coil, a positive magnetic field is generated. The armature drives the moving spring to swing, causing the moving contact to make contact with the stationary contact, thus connecting the external load circuit. When a reverse pulse voltage is applied to the coil, a reverse magnetic field is generated. The armature drives the moving spring to swing in the opposite direction, causing the moving contact to separate from the stationary contact, thus disconnecting the external load circuit.

[0003] In high-current applications, magnetic latching relays require sufficient distance between the moving and stationary contacts when separated to meet electrical clearance requirements. This means the contact area needs ample design space in the direction of the moving spring's oscillation. However, the space available for relay installation within existing meter housings is limited in all directions. This is especially true in scenarios requiring the switching of multiple load circuits, where multiple sets of contact components are needed. This further complicates the internal space of the relay, leaving less room for designing electrical clearances between the contacts. Utility Model Content

[0004] Therefore, it is necessary to provide a relay and a meter that include the aforementioned relay to address the problems associated with existing magnetic latching relays.

[0005] According to one aspect of this application, a relay is provided, comprising:

[0006] The magnetic circuit portion includes a coil frame and a coil wound on the coil frame, the central axis of the coil frame extending along a first direction;

[0007] The contact portion is disposed on one side of the magnetic circuit portion along a second direction perpendicular to the first direction. The contact portion includes at least two sets of contact components arranged side by side along the first direction. The contact components include a moving contact with a moving contact and a stationary contact with a stationary contact. The moving contact can swing along the first direction under the drive of the electromagnetic force generated by the coil being energized, so that the moving contact and the stationary contact can contact or separate.

[0008] In one embodiment, the contact portion is adjacent to one side of the coil frame along the second direction.

[0009] In one embodiment, the stationary contact has a first lead-out end, the moving contact has a second lead-out end, and the first lead-out end and the second lead-out end are spaced apart along the first direction;

[0010] Alternatively, the static contact has a first lead-out end and a second lead-out end spaced apart along a third direction, the third direction being perpendicular to both the first direction and the second direction;

[0011] When the moving contact is in contact with the stationary contact, the first lead-out end and the second lead-out end are connected to each other; when the moving contact is separated from the stationary contact, the first lead-out end and the second lead-out end are disconnected from each other.

[0012] In one embodiment, the moving contact has a fixed end and a contact end disposed opposite to each other along the third direction. The fixed end is fixedly connected to the first lead-out end, the stationary contact is disposed on the second lead-out end, and the moving contact is disposed on the contact end. The contact end is capable of swinging along the first direction so that the moving contact and the stationary contact come into contact or separate from each other.

[0013] In one embodiment, the magnetic circuit portion further includes an armature assembly adjacent to one side of the coil frame along a third direction, the third direction being perpendicular to both the first and second directions. The moving contact is connected to the armature assembly, and the armature assembly is capable of moving under the drive of the electromagnetic force to cause the moving contact to swing.

[0014] In one embodiment, the armature assembly includes an armature and a pusher connected to each other, the pusher being connected to the moving contact, and the armature being able to rotate about a central axis extending along the second direction under the action of the electromagnetic force, so as to drive the pusher and the moving contact to swing along the first direction.

[0015] In one embodiment, the moving contact includes a moving spring and a compression spring. The moving contact is disposed at one end of the moving spring, and one end of the compression spring is connected to the portion of the moving spring near the moving contact. The other end of the compression spring is connected to the armature assembly. Under the drive of the armature assembly, the compression spring can produce a recoverable deformation.

[0016] In one embodiment, the thickness direction of the movable spring is arranged parallel to the first direction.

[0017] In one embodiment, the moving contact further includes a magnetic conductor, at least a portion of the magnetic conductor, one end of the compression spring, and the moving spring are stacked and fixedly connected to each other; the relay further includes a magnetic block, and when the moving contact contacts the stationary contact to conduct electricity, the magnetic conductor and the magnetic block generate a magnetic circuit.

[0018] In one embodiment, the coil frame has a connecting portion at at least one end along the first direction, and a pin is provided on the connecting portion. One end of the pin is connected to the coil, and the other end is used to connect to an external power source and extends in a straight line or bends.

[0019] In one embodiment, the relay further includes a housing, the magnetic circuit portion and the contact portion are at least partially disposed within the housing, and a magnetic shielding plate is provided between at least one side of the magnetic circuit portion and the inner wall of the housing.

[0020] According to another aspect of this application, an electricity meter is provided, including a meter housing and a relay as described in any of the above embodiments, the relay being disposed within the meter housing.

[0021] In one embodiment, the watch case is provided with a guide rail groove extending along the first direction;

[0022] The size of the watch case in the first direction is smaller than the size of the watch case in the second direction and the third direction, and the third direction is perpendicular to both the first direction and the second direction.

[0023] The aforementioned relays and meters, by extending the central axis of the coil frame along a first direction and placing the contact portion along a second direction perpendicular to the first direction on one side of the magnetic circuit portion, ensure that the magnetic circuit portion does not encroach on the swing space of the moving contact, thereby allowing the moving contact to swing with a larger swing space in the first direction. It is easy to see that the stationary contact and the moving contact can maintain a sufficient distance in the separated state, thus providing a large electrical clearance between the stationary contact and the moving contact. This improves insulation performance, prevents breakdown and short circuits, facilitates heat dissipation and maintenance, enhances anti-interference capabilities, and avoids malfunctions, meeting the requirements of high-current applications. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the appearance of an electricity meter provided in an embodiment of this application.

[0025] Figure 2 A schematic diagram of the internal structure of an electricity meter provided in an embodiment of this application (the meter casing is hidden).

[0026] Figure 3 This is an axonometric view of a relay provided in an embodiment of this application.

[0027] Figure 4 Schematic diagram of the internal structure of a relay provided in an embodiment of this application Figure 1 (The shell was hidden).

[0028] Figure 5 Schematic diagram of the internal structure of a relay provided in an embodiment of this application Figure 2 (The shell was hidden).

[0029] Figure 6 This is a schematic diagram of the structure of a coil and coil frame provided in an embodiment of this application.

[0030] Figure 7 This is a schematic diagram of a coil wound on a coil frame according to an embodiment of this application.

[0031] Figure 8 This is a schematic diagram of a coil wound on a coil frame, provided for another embodiment of this application.

[0032] Figure 9 A front view of a relay provided in an embodiment of this application.

[0033] Figure 10 A front view of a relay provided in an embodiment of this application (housing is hidden).

[0034] Figure 11 This is a front view of the magnetic circuit portion of a relay provided in an embodiment of this application.

[0035] Figure 12 This is an axial view of the connection between the push card and the moving contact in a relay provided in an embodiment of this application.

[0036] Figure 13 This is a front view of the connection between the push card and the moving contact in a relay provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Meter; 100. Meter case; 101. Terminal block; 102. Guide rail groove; 200. Relay; 210. Housing; 220. Magnetic circuit part; 221. Pin; 222. Coil frame; 2221. Column; 2222. End; 2223. Connecting part; 223. Coil; 224. Armature assembly; 2241. Armature; 2241a. First swing arm; 2241b. Second swing arm; 2241c. Third swing arm; 2241d. Fourth swing arm; 2242. Pusher; 225. First yoke; 226. Second... 230. Yoke; 231. Contact part; 231. Contact assembly; 2311. Moving contact; 2311a. Fixed end; 2311b. Contact end; 2311c. Moving spring; 2311d. Compression spring; 2311e. Magnetic conductor; 2311f. Body; 2311g. Protrusion; 2312. Moving contact; 2313. Stationary contact; 2313a. Lead-out end; 2313b. First lead-out end; 2313c. Second lead-out end; 2314. Stationary contact; 240. Magnetic block; 250. Magnetic shielding plate; 300. Current transformer. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] This application provides a relay and an electricity meter, see reference. Figure 1 and Figure 2 , Figure 1 This paper shows a schematic diagram of the appearance of the meter 10 in one embodiment of the present application. Figure 2A schematic diagram of the internal structure of the electricity meter 10 is shown. One embodiment of the electricity meter 10 provided in this application is a double-rail meter, comprising a casing 100 and a relay 200 disposed within the casing 100. The casing 100 has several terminals 101 for connecting to a load circuit. One terminal 101 has a current transformer 300 for measuring the current, enabling the electricity meter 10 to obtain the load's power consumption during operation. The relay 200 has several leads 2313a, each lead 2313a correspondingly connected to one terminal 101. The relay 200 controls the on / off state of the load circuit, thereby protecting the load through circuit switching and automatic adjustment, preventing damage to the load due to excessive current.

[0046] In the embodiments of this application, the relay 200 is a magnetic latching relay 200. The structure of the relay 200 in this embodiment will be described below. It is understood that the relay 200 provided in this application can be any type of relay 200 used in other fields, and is not limited to the magnetic latching relay 200 used in the meter 10. Furthermore, the meter 10 is not limited to a double-rail meter, but can be any type of meter 10, and there are no particular limitations in this regard.

[0047] See Figure 3 , Figure 4 and Figure 5 , Figure 3 A schematic diagram of a relay 200 provided in an embodiment of this application is shown. Figure 4 and Figure 5 A schematic diagram of the internal structure of a relay 200 is shown. The relay 200 in this embodiment includes a housing 210, a magnetic circuit portion 220, and a contact portion 230. The magnetic circuit portion 220 and the contact portion 230 are at least partially disposed within the housing 210 and are arranged adjacent to each other. The magnetic circuit portion 220 is used to provide electromagnetic force; the contact portion 230 is used to connect to the load circuit. Under the action of the electromagnetic force, the contact portion 230 can control the on / off state of the load circuit.

[0048] Specifically, in some embodiments, the magnetic circuit portion 220 includes a coil frame 222 and a coil 223 wound on the coil frame 222. The coil frame 222 is provided with a plurality of pins 221. One end of the pins 221 is connected to the coil 223, and the other end of the pins 221 is used to connect to an external power source. Driven by the electrical energy provided by the external power source, the coil 223 can be energized to generate a magnetic field, thereby generating an electromagnetic force. In a preferred embodiment, such as... Figure 6As shown, the coil frame 222 includes a cylindrical column 2221 and end heads 2222 located at both ends of the column 2221 along its axial direction. The coil 223 is wound around the column 2221. Both end heads 2222 are approximately L-shaped. The extension length of one end head 2222 along the axial direction of the column 2221 is greater than the extension length of the other end head 2222 along the axial direction of the column 2221, so that one end head 2222 forms a connecting portion 2223. The pin 221 is connected and passed through the connecting portion 2223 by injection molding. One end of the pin 221 is connected to the coil 223, and the other end extends in a straight line or bends according to the wiring requirements of the client for connecting an external power supply.

[0049] Figure 7 In the middle, the connection part 2223 is located on the right side of the coil frame 222, indicating that the external power supply is also on this side. When the wiring requirements of the client change, for example, when the external power supply is in... Figure 8 When the coil holder 222 is positioned to the left, it can be rotated 180° so that the connecting portion 2223 with the pin 221 is located on the left side of the coil holder 222. Therefore, there is no need to replace the coil holder 222, thus saving costs. It is understood that the coil holder 222 can also have connecting portions 2223 and pins 221 at opposite ends along its own axial direction. In this way, when the customer's wiring requirements change, the coil holder 222 can be connected directly to the pins 221 located in different positions without disassembling the coil holder 222. The specific design can be customized as needed and is not limited thereto.

[0050] For the contact portion 230, the contact portion 230 includes at least two sets of contact components 231. Setting at least two sets of contact components 231 can cope with scenarios that require switching on and off multiple load circuits. Figures 3 to 5In the embodiment, the contact assembly 231 has two sets, which are arranged side by side. Each set of contact assemblies 231 includes a moving contact 2311 with a moving contact 2312 and a stationary contact 2313 with a stationary contact 2314. A plurality of leads 2313a include a first lead 2313b and a second lead 2313c. The first lead 2313b and the second lead 2313c can be respectively disposed on the stationary contact 2313 and the moving contact 2311, or they can both be disposed on the stationary contact 2313. One of the first lead 2313b and the second lead 2313c is used to connect to the input terminal of the load circuit through the corresponding terminal 101 on the case 100, and the other is used to connect to the output terminal of the load circuit through the corresponding terminal 101. When the coil 223 is energized, the moving contact 2311 can swing under the drive of the electromagnetic force generated by the magnetic circuit part 220, so that the moving contact 2312 and the stationary contact 2314 can contact or separate. When the moving contact 2312 and the stationary contact 2314 are in contact, the first lead 2313b and the second lead 2313c are connected to each other. When the moving contact 2312 and the stationary contact 2314 are separated, the first lead 2313b and the second lead 2313c are disconnected from each other, thereby realizing the connection or disconnection of the load circuit.

[0051] It is worth noting that the relay 200 provided in this application is installed in a double-layer guide rail meter, combined with Figure 1 As shown, the case 100 of the double-layer guide rail meter has a cubic structure, with a smaller dimension in the first direction (X direction shown in the figure), resulting in a more compact internal space. The case 100 has a guide rail groove 102 extending along the first direction. The meter 10 is mounted on the guide rail via the guide rail groove 102. The dimension of the case 100 in the first direction is smaller than its dimensions in the second direction (Y direction shown in the figure, perpendicular to the X direction) and the third direction (Z direction shown in the figure, perpendicular to both the X and Y directions). Therefore, the length of the guide rail occupied by the meter can be minimized, allowing for more space on the guide rail to install other components and improving the utilization rate of the guide rail.

[0052] When the relay 200 is installed in the housing 100, if the magnetic circuit part 220 and the contact part 230 are arranged side by side along the first direction, the space available for designing the electrical clearance between the contacts is small. As a result, when the relay 200 is working, the large amount of heat generated between the contacts is difficult to dissipate, and there is a risk of insulation breakdown, which may cause the relay 200 to fail to work properly.

[0053] Therefore, in order to solve this problem, the applicant of this application discovered that double-layer guide rails in Figure 1The space in the second and third directions is larger than the space in the first direction. Therefore, in order to fully utilize the space in the second and third directions, such as... Figure 3 and Figure 4 As shown, the relay 200 of this application is designed such that the central axis of the coil frame 222 extends along a first direction, and the contact portion 230 is disposed on one side of the magnetic circuit portion 220 along a second direction. The moving contact 2311 can swing along the first direction under the drive of the magnetic circuit portion 220 so that the moving contact 2312 contacts or separates from the stationary contact 2314.

[0054] In a specific arrangement, in one embodiment, the first lead-out end 2313b can be disposed on the stationary contact member 2313, and the second lead-out end 2313c can be disposed on the moving contact member 2311. The first lead-out end 2313b and the second lead-out end 2313c are spaced apart along a first direction. When the moving contact member 2311 swings along the first direction, the first lead-out end 2313b and the second lead-out end 2313c can be made to be connected or disconnected from each other.

[0055] In another embodiment, such as Figure 9 and Figure 10 As shown, the stationary contact 2313 includes two stationary springs. The first lead-out end 2313b and the second lead-out end 2313c are respectively disposed on one of the stationary springs, and the first lead-out end 2313b and the second lead-out end 2313c are offset from each other along a third direction. More specifically, in this embodiment, the moving contact 2311 has a fixed end 2311a and a contact end 2311b disposed opposite each other along a third direction. The fixed end 2311a is fixedly connected to the first lead-out end 2313b. The moving contact 2312 is disposed on the contact end 2311b, and the stationary contact 2314 is disposed on the second lead-out end 2313c. Under the drive of electromagnetic force, the contact end 2311b can swing relative to the fixed end 2311a in a first direction, so that the moving contact 2312 and the stationary contact 2314 come into contact or separate from each other.

[0056] As can be seen from the design of the above embodiments, when the moving contact 2311 swings along the first direction, the magnetic circuit portion 220 will not encroach on the swing space of the moving contact 2311, allowing the moving contact 2311 to be designed with a large swing space. Because the moving contact 2311 can swing with a large swing space, the stationary contact 2314 and the moving contact 2312 can maintain a sufficient distance in the separated state, thereby creating a large electrical clearance between the stationary contact 2314 and the moving contact 2312. This improves insulation performance, prevents short circuits, facilitates heat dissipation and maintenance, enhances anti-interference capabilities, and avoids malfunctions.

[0057] Furthermore, it can be observed that since the first lead 2313b and the second lead 2313c are spaced apart along a third direction, therefore... Figure 9 As shown, the first lead-out terminal 2313b and the second lead-out terminal 2313c are both located close to the shell wall of the housing 210. Therefore, the first lead-out terminal 2313b and the second lead-out terminal 2313c do not need to be extended too far to extend out of the housing 210 and connect to the wiring terminal 101 on the meter housing 100, thereby saving the material used to manufacture the first lead-out terminal 2313b and the second lead-out terminal 2313c.

[0058] It is understood that the portions of the first lead 2313b and the second lead 2313c housed within the casing can be either curved or planar, and there is no limitation on this. For example Figure 9 and Figure 10 In the embodiment, the portion of the first lead-out end 2313b housed in the housing has a structure that extends along a plane, and the portion of the second lead-out end 2313c housed in the housing has a structure that extends in a bent direction. The structure that extends along a plane can make the fabrication of the lead-out end 2313a simpler.

[0059] More specifically, regarding the structure of how the magnetic circuit section 220 drives the moving contact 2311 to oscillate, such as... Figure 10 As shown, the magnetic circuit part 220 also includes an armature assembly 224. The contact end 2311b of the moving contact 2311 is connected to the armature assembly 224. When the coil 223 generates electromagnetic force, the armature assembly 224 can move under the drive of electromagnetic force to drive the contact end 2311b of the moving contact 2311 to swing.

[0060] As mentioned above, the case 100 of the double-layer guide rail watch has a relatively large space in the third direction. Therefore, in order to make full use of the third space, the central axis of the coil holder 222 extends along the first direction. In this way, when the coil holder 222 is wound with the coil 223, the space occupied by the coil holder 222 in the third direction (i.e., the radial direction of the coil holder 222) will not be very large. Based on this arrangement, such as Figure 5 As shown, the armature assembly 224 can be disposed adjacent to the coil frame 222 on one side along the third direction, thereby allowing the contact portion 230 to be disposed adjacent to the coil frame 222 on one side along the second direction. It is easy to see that, through this design, the space inside the meter housing 100 in the third direction can be fully utilized, and the size of the relay 200 in the second direction is smaller, making the overall structure of the relay 200 more compact.

[0061] Please continue reading. Figure 10In the embodiment shown in the figure, the armature assembly 224 includes an armature 2241 and a pusher 2242 connected to each other. The armature 2241 is magnetic, and the pusher 2242 is connected to the contact end 2311b of the moving contact 2311. When the coil 223 is energized to generate electromagnetic force, the armature 2241 can rotate around a central axis extending in a second direction under the action of electromagnetic force, so as to drive the pusher 2242 to move in a first direction.

[0062] In one embodiment, the relay 200 provided in this application is a magnetic latching relay 200. To achieve the magnetic latching function, that is, after the coil 223 is de-energized, the moving contact 2312 and the stationary contact 2314 can remain connected or remain disconnected, such as... Figure 11 As shown, the magnetic circuit part 220 also includes a first yoke 225 and a second yoke 226. The first yoke 225 and the second yoke 226 are respectively disposed at opposite ends of the coil frame 222 along its own axial direction (i.e., the first direction). When the coil 223 is energized, that is, when the coil 223 is energized, one of the first yoke 225 and the second yoke 226 serves as the positive pole and the other serves as the negative pole. An electromagnetic field can be generated between the two to generate electromagnetic force. The armature 2241 itself has a first swing arm 2241a and a second swing arm 2241b at opposite ends along the first direction.

[0063] Please continue reading. Figure 11 When the relay 200 is working, when a positive voltage is applied to the coil 223, the armature 2241 rotates clockwise around the central axis extending in the second direction. At this time, the first swing arm 2241a is connected to the first yoke 225 under the action of electromagnetic force, and at the same time, the pusher 2242 pushes the contact end 2311b of the moving contact 2311 to swing so that the moving contact 2312 contacts the stationary contact 2314. Conversely, when a negative voltage is applied to the coil 223, the armature 2241 rotates counterclockwise around the central axis, and the second swing arm 2241b is connected to the second yoke 226 under the action of electromagnetic force. The pusher 2242 pushes the moving contact 2311 to swing in the opposite direction so that the moving contact 2312 disengages from the stationary contact 2314.

[0064] Furthermore, when the armature 2241 overlaps with the first yoke 225 or the second yoke 226, in order to make the armature 2241 move more stably and the connection with the first yoke 225 and the second yoke 226 more secure, based on the above embodiment, the armature 2241 also has a third swing arm 2241c and a fourth swing arm 2241d at opposite ends along the first direction, and the third swing arm 2241c is also spaced apart from the first swing arm 2241a in the first direction, and the third swing arm The third swing arm 2241c is diagonally positioned opposite the second swing arm 2241b, and the fourth swing arm 2241d is spaced apart from the second swing arm 2241b in the third direction, and the fourth swing arm 2241d is diagonally positioned opposite the first swing arm 2241a; when a positive voltage is applied to the coil 223, the fourth swing arm 2241d is connected to the second yoke 226 under the action of electromagnetic force; when a negative voltage is applied to the coil 223, the third swing arm 2241c is connected to the first yoke 225 under the action of electromagnetic force.

[0065] It is easy to see that when the first swing arm 2241a of the armature 2241 is engaged with the first yoke 225, the fourth swing arm 2241d is also engaged with the second yoke 226; when the second swing arm 2241b is attracted to the second yoke 226, the third swing arm 2241c is also engaged with the first yoke 225. Thus, regardless of its state, the armature 2241 has two positions that are in contact with the first yoke 225 and the second yoke 226 respectively, making the connection of the armature 2241 more secure. Furthermore, because the armature 2241 is magnetic, when the coil 223 is de-energized, the armature 2241 still maintains contact with the first yoke 225 and the second yoke 226, thereby ensuring that the moving contact 2312 and the stationary contact 2314 remain in contact or disconnected, thus achieving the magnetic holding function.

[0066] See Figure 12 and Figure 13 The figure shows the structure of the moving contact 2311 in one embodiment. In this embodiment, the moving contact 2311 includes a moving spring 2311c and a compression spring 2311d. The moving contact 2312 is disposed at one end of the moving spring 2311c to form the contact end 2311b of the moving contact 2311. The other end of the moving spring 2311c is connected to the second lead-out end 2313c to form the fixed end 2311a of the moving contact 2311. One end of the compression spring 2311d is connected to the part of the moving spring 2311c near the moving contact 2312, and the other end of the compression spring 2311d is connected to the push card 2242 of the armature assembly 224. The push card 2242 can push the compression spring 2311d to produce elastic deformation. By setting the compression spring 2311d, it can be ensured that the moving contact 2312 has sufficient overtravel and that sufficient pressure can be generated when the moving contact 2312 and the stationary contact 2314 are in contact, thus ensuring that the contact between the moving contact 2312 and the stationary contact 2314 remains stable.

[0067] It should be noted that when the load circuit generates a large short-circuit current, a large repulsive force will be generated between the moving contact 2312 and the stationary contact 2314, and the moving spring 2311c is prone to warping, which will cause the moving contact 2312 and the stationary contact 2314 to easily separate, resulting in an unstable contact state between the moving contact 2312 and the stationary contact 2314. To solve this problem, based on the above embodiment, the moving contact 2311 also includes a magnetic conductive element 2311e. At least a portion of the magnetic conductive element 2311e, one end of the compression spring 2311d, and the moving spring 2311c are stacked and fixedly connected to each other. Corresponding to the magnetic conductive element 2311e, the relay 200 also includes a magnetic conductive block 240 disposed on the inner wall of the housing 210. When the moving contact 2312 and the stationary contact 2314 are in contact and conducting electricity, the magnetic conductive element 2311e and the magnetic conductive block 240 form a magnetic circuit, so that the magnetic conductive element 2311e and the magnetic conductive block 240 tend to attract each other. By setting up the magnetic conductive element 2311e and the magnetic conductive block 240, the magnetic conductive element 2311e and the magnetic conductive block 240 can form a magnetic circuit and attract each other. Since the attraction force is opposite to the repulsive force between the moving contact 2312 and the stationary contact 2314, and since at least a part of the magnetic conductive element 2311e, one end of the compression spring 2311d, and the moving spring 2311c are stacked and connected, when a large short-circuit current is generated in the load circuit, a part of the moving contact 2311 is increased in overall thickness, and the lever arm of the moving spring 2311c that can be deformed is reduced, so that the moving spring 2311c can be prevented from tilting up and the moving contact 2312 and the stationary contact 2314 can be prevented from separating. Therefore, a stable contact state can be maintained between the moving contact 2312 and the stationary contact 2314.

[0068] In a preferred embodiment, the magnetic conductor 2311e includes a body 2311f and a protrusion 2311g connected to the body 2311f. The body 2311f is U-shaped and forms a receiving cavity (not shown in the figure) with an opening. One segment of the movable spring 2311c is received in the receiving cavity. When the magnetic block 240 approaches the magnetic conductor 2311e, the magnetic block 240 can close the opening of the receiving cavity and form a magnetic circuit with the body 2311f; the protrusion 2311g... 1g is preferably fixed to one end of the compression spring 2311d and the moving spring 2311c by riveting, which reduces the lever arm of the moving spring 2311c that can deform, further preventing the moving spring 2311c from deforming when a large short-circuit current is generated in the load circuit. Moreover, only one rivet is needed to connect the moving spring 2311c, the compression spring 2311d and the magnetic conductor 2311e into one unit, thus simplifying the connection process of the three.

[0069] In a preferred embodiment, combined with Figure 3 , Figure 4 and Figure 12 As shown, the thickness direction of the moving spring 2311c is parallel to the first direction; in other words, the width direction of the moving spring 2311c is parallel to the second direction. Here, "parallel" means either parallel or nearly parallel to each other. This arrangement utilizes the larger space inside the case 100 of the double-layer guide rail in the second direction, allowing the moving spring 2311c to be designed with a wider width. This enables the arrangement of two or more moving contacts 2312 on the moving spring 2311c and two or more corresponding stationary contacts 2314 on the stationary contact 2313, as shown in the figure. This increases the cross-sectional area of ​​the moving spring 2311c and enhances its current-carrying capacity. Therefore, when a large short-circuit current is generated in the load circuit, the moving spring 2311c can withstand it, ensuring the normal operation of the relay 200. Furthermore, the thickness direction of the moving spring 2311c is the narrowest direction in the three-dimensional dimensions of the moving spring 2311c. By using the thickness direction of the moving spring 2311c to be parallel to the first direction, there is more space available in the first direction to design the electrical clearance between the moving contact 2312 and the stationary contact 2314.

[0070] It is worth mentioning that this application is beneficial to improving the heat dissipation performance of the relay 200 in at least the following aspects: the first lead 2313b and the second lead 2313c are spaced apart along the third direction, and both the first lead 2313b and the second lead 2313c are located close to the shell wall of the housing 210. The first lead 2313b and the second lead 2313c have a large distance in the third direction to facilitate heat dissipation.

[0071] The magnetic circuit section 220 does not encroach on the swing space of the moving contact 2311 in the first direction. Combined with the fact that the thickness direction of the moving spring 2311c is parallel to the first direction, the moving contact 2312 and the stationary contact 2314 can be designed with a large electrical clearance (i.e., a large gap between the moving contact 2312 and the stationary contact 2314 when they are disconnected), which facilitates heat dissipation. Furthermore, there can also be a large gap between adjacent sets of contact components 231 in the first direction to improve heat dissipation.

[0072] Furthermore, since the electricity meter 10 is typically installed in an electrical control cabinet, there are interfering magnetic fields generated by other electrical devices in this environment. Under the interference of these magnetic fields, the magnetic circuit of the magnetic latching relay 200 is easily switched, causing the magnetic latching relay 200 to fail to maintain normal operation. To shield against the interfering magnetic field and ensure the normal operation of the relay 200, in the embodiments provided in this application, such as... Figure 3 and Figure 4As shown, the housing 210 of the relay 200 also includes a magnetic shielding plate 250 made of a highly permeable magnetic material. The magnetic shielding plate 250 is located between at least one side of the magnetic circuit portion 220 and the inner wall of the housing 210. Its purpose is to shield the interfering magnetic field outside the meter housing 100 of the meter 10, so as to prevent it from affecting the relay 200. The specific shielding principle is to make the magnetic lines of force of the interfering magnetic field preferentially pass through the magnetic shielding plate 250, rather than the coil 223 and contacts inside the relay 200. This allows the magnetic shielding plate 250 to guide the magnetic lines of force of the external interfering magnetic field to bypass it, confining the magnetic lines of force of the external interfering magnetic field within itself, and reducing the direct penetration of the magnetic field into the core components of the relay 200.

[0073] Combination Figure 1 and Figure 2 As shown, it can be seen that the relay 200 is located near the bottom wall of the meter casing 100, so that the bottom wall of the relay 200 casing 210 is adjacent to the bottom wall of the meter casing 100. Therefore, the relay 200 located near the bottom wall of the meter casing 100 is most susceptible to interference from external magnetic fields compared to other locations farther away from the meter casing 100. In the embodiments of this application, the magnetic shielding plate 250 is disposed on one side of the coil frame 222 along a third direction, that is, between the magnetic circuit portion 220 and the bottom wall of the housing 210. Thus, it can be seen that shielding against electromagnetic interference from outside the meter 10 is achieved simply by installing a magnetic shielding plate 250 on the side of the magnetic circuit portion 220 of the relay 200 near the meter housing 100. On other sides of the magnetic circuit portion 220, since the distance from the meter housing 100 is relatively far, there is no need to install the magnetic shielding plate 250. Therefore, the structure of the relay 200 provided in this application for shielding against external electromagnetic interference is simple, effectively shielding against external electromagnetic interference while also reducing the manufacturing cost of the relay 200. In this embodiment, the guide rail groove 102 is disposed on the bottom wall of the housing 100, and the magnetic shielding plate 250 is located near the guide rail groove 102.

[0074] It is understandable that if the housing 210 of the relay 200 is close to the housing 100 of the meter 10 on multiple sides, magnetic shielding plates 250 can also be provided on multiple sides of the magnetic circuit section 220, and there is no limitation here.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A relay, characterized in that, include: The magnetic circuit portion includes a coil frame and a coil wound on the coil frame, the central axis of the coil frame extending along a first direction; The contact portion is disposed on one side of the magnetic circuit portion along a second direction perpendicular to the first direction. The contact portion includes at least two sets of contact components arranged side by side along the first direction. The contact components include a moving contact with a moving contact and a stationary contact with a stationary contact. The moving contact can swing along the first direction under the drive of the electromagnetic force generated by the coil being energized, so that the moving contact and the stationary contact can contact or separate.

2. The relay according to claim 1, characterized in that, The contact portion is located adjacent to one side of the coil frame along the second direction.

3. The relay according to claim 1, characterized in that, The stationary contact has a first lead-out end, and the moving contact has a second lead-out end, with the first lead-out end and the second lead-out end being spaced apart along the first direction; Alternatively, the static contact has a first lead-out end and a second lead-out end spaced apart along a third direction, the third direction being perpendicular to both the first direction and the second direction; When the moving contact is in contact with the stationary contact, the first lead-out end and the second lead-out end are connected to each other; when the moving contact is separated from the stationary contact, the first lead-out end and the second lead-out end are disconnected from each other.

4. The relay according to claim 3, characterized in that, The moving contact has a fixed end and a contact end disposed opposite to each other along the third direction. The fixed end is fixedly connected to the first lead-out end. The stationary contact is disposed on the second lead-out end. The moving contact is disposed on the contact end. The contact end can swing along the first direction so that the moving contact and the stationary contact can come into contact or separate from each other.

5. The relay according to claim 1, characterized in that, The magnetic circuit section also includes an armature assembly, which is adjacent to one side of the coil frame along a third direction. The third direction is perpendicular to both the first and second directions. The moving contact is connected to the armature assembly, and the armature assembly can move under the drive of the electromagnetic force to cause the moving contact to swing.

6. The relay according to claim 5, characterized in that, The armature assembly includes an armature and a pusher connected to each other. The pusher is connected to the moving contact. The armature can rotate around a central axis extending in the second direction under the action of the electromagnetic force, so as to drive the pusher and the moving contact to swing in the first direction.

7. The relay according to claim 5, characterized in that, The moving contact includes a moving spring and a compression spring. The moving contact is located at one end of the moving spring, and one end of the compression spring is connected to the portion of the moving spring near the moving contact. The other end of the compression spring is connected to the armature assembly. Under the drive of the armature assembly, the compression spring can generate elastic deformation.

8. The relay according to claim 7, characterized in that, The thickness direction of the movable spring is parallel to the first direction.

9. The relay according to claim 7, characterized in that, The moving contact also includes a magnetic conductor, at least a portion of which, one end of the compression spring, and the moving spring are stacked and fixedly connected to each other; the relay also includes a magnetic block, which generates a magnetic circuit when the moving contact contacts the stationary contact and conducts electricity.

10. The relay according to claim 1, characterized in that, The coil frame has a connecting portion at at least one end along the first direction, and a pin is provided on the connecting portion. One end of the pin is connected to the coil, and the other end is used to connect to an external power source and extends in a straight line or bends.

11. The relay according to claim 1, characterized in that, The relay also includes a housing, and the magnetic circuit portion and the contact portion are at least partially disposed within the housing. A magnetic shielding plate is provided between at least one side of the magnetic circuit portion and the inner wall of the housing.

12. An electricity meter, characterized in that, The watch case includes a relay as described in any one of claims 1-11, the relay being disposed within the watch case.

13. The electricity meter according to claim 12, characterized in that, The watch case is provided with a guide rail groove extending along the first direction; The size of the watch case in the first direction is smaller than the size of the watch case in the second direction and the third direction, and the third direction is perpendicular to both the first direction and the second direction.

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