A relay and an electric energy meter

Abstract

The utility model belongs to low -voltage electrical apparatus technical field, specifically disclose a kind of relay and electric energy meter. The relay provided by the utility model, wiring harness is connected with first circuit board by sampling conductive sheet, simplify the assembly process of relay, and the fixed part is equipped on the relay body, and the fixed part is connected with sampling conductive sheet, and the fixed part supports sampling conductive sheet, avoid sampling conductive sheet to bend when connecting with first circuit board, guarantee sampling conductive sheet and first circuit board fully connect, improve the assembly quality of relay, reduce the influence to the assembly reliability of relay.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a relay and an energy meter. Background Technology

[0002] Because of the unique electrical and physical characteristics of relays in control circuits, their high insulation resistance in the off state and low conduction resistance in the on state make them unmatched by any other electronic component. In addition, relays have advantages such as high standardization, good versatility, and the ability to simplify circuits. Therefore, relays are widely used in various electronic equipment in aerospace, aviation, military electronic equipment, information industry, and the national economy.

[0003] The ease of relay assembly significantly impacts its reliability. In existing technologies, the relay's terminal block and PCB are connected by wires, involving numerous assembly steps and resulting in poor assembly reliability. To address these issues, a sampling copper strip is used to connect the terminal block and PCB. However, because this sampling copper strip is relatively thin, it is prone to bending during connection, reducing the relay's assembly quality and consequently affecting its reliability. Utility Model Content

[0004] The purpose of this utility model is to provide a relay and an energy meter that reduces assembly steps, improves the assembly quality of the relay, and reduces the impact on the assembly reliability of the relay.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Firstly, a relay is provided, comprising:

[0007] First circuit board;

[0008] Relay body;

[0009] Sampling conductive sheet;

[0010] A terminal block is electrically connected to the relay body; one end of the sampling conductive piece is connected to the terminal block; and the other end of the sampling conductive piece is electrically connected to the first circuit board.

[0011] A fixing member is provided, one end of which is connected to the relay body, and the other end of which is connected to the other end of the sampling conductive sheet, and the fixing member supports the sampling conductive sheet.

[0012] As an optional technical solution for the aforementioned relay, the fixing component includes a first fixing plate, a second fixing plate, and a third fixing plate connected in sequence. The first fixing plate and the second fixing plate are set at an angle, and the third fixing plate is set at an angle to the second fixing plate. The third fixing plate is connected to the relay body. The first fixing plate is provided with a fixing hole, and the other end of the sampling conductive sheet passes through the fixing hole.

[0013] As an optional technical solution for the aforementioned relay, the sampling conductive sheet is disposed on one side of the relay body, and a first snap-fit ​​plate is provided on the side of the relay body facing the sampling conductive sheet. A second snap-fit ​​plate is connected to the end of the first snap-fit ​​plate away from the relay body. The second snap-fit ​​plate is set at an angle to the first snap-fit ​​plate, and a snap-fit ​​block is provided at the end of the second snap-fit ​​plate away from the first snap-fit ​​plate. The third fixing plate is inserted between the snap-fit ​​block and the first snap-fit ​​plate.

[0014] Secondly, an electricity meter is provided, the electricity meter including a base, a current transformer and a relay as described above, one end of the terminal block passing through the current transformer, the base having a receiving cavity, the current transformer and the relay body being disposed within the receiving cavity, the current transformer and the base respectively having guide posts, the first circuit board having guide holes, sampling conductive holes and information conductive holes, the guide posts being inserted into the guide holes, the sampling conductive sheet being inserted into the sampling conductive holes, the relay body having an information output pin, the information output pin being inserted into the information conductive holes, and one end of the sampling conductive sheet being riveted to the terminal block.

[0015] As an optional technical solution for the aforementioned electricity meter, a support base is provided at the bottom of the receiving cavity. The surface shape of the support base is adapted to the bottom surface shape of the current transformer. A snap-fit ​​plate is provided on both opposite sides of the support base. A snap-fit ​​hole is provided on the snap-fit ​​plate. A snap-fit ​​protrusion is provided on both opposite sides of the current transformer. The snap-fit ​​protrusion is snapped into the snap-fit ​​hole.

[0016] As an optional technical solution for the aforementioned electricity meter, the base includes a base plate, with side plates on one opposite side of the base plate and terminal mounting seats on the other opposite side of the base plate. The terminal mounting seats, the side plates, and the base plate surround and form the receiving cavity. One of the terminal mounting seats on one side is spaced apart from the side plate. One end of the current transformer is inserted between the terminal mounting seat and the side plate, and the other end of the current transformer is supported by the support base. The first circuit board is disposed between the two side plates.

[0017] As an optional technical solution for the aforementioned electricity meter, the electricity meter further includes a second circuit board, the end of the side plate is provided with a positioning post, the second circuit board is provided with a positioning hole, and the positioning post is inserted into the positioning hole.

[0018] As an optional technical solution for the aforementioned electricity meter, a partition plate is provided inside the receiving cavity, and the partition plate is disposed between two adjacent relay bodies.

[0019] As an optional technical solution for the aforementioned electricity meter, the electricity meter further includes a cover, the cover having a first guide post and a first snap-fit ​​component, the base having a second guide post and a second snap-fit ​​component, one of the first guide post and the second guide post having a plug hole, the other of the first guide post and the second guide post being inserted into the plug hole, the first snap-fit ​​component being snapped into the second snap-fit ​​component, and the cover covering the outside of the relay body and the current transformer.

[0020] As an optional technical solution for the aforementioned electricity meter, the edge of the cover that contacts the base is provided with a first stepped surface, and the base is provided with a second stepped surface, the second stepped surface being coupled to the first stepped surface.

[0021] The beneficial effects of this utility model are:

[0022] The relay provided by this utility model has a terminal block connected to a first circuit board via a sampling conductive sheet, which simplifies the relay assembly process. The relay body is provided with a fixing component, which is connected to the sampling conductive sheet. The fixing component supports the sampling conductive sheet and prevents it from bending when connected to the first circuit board, ensuring that the sampling conductive sheet is fully connected to the first circuit board. This improves the assembly quality of the relay and reduces the impact on the assembly reliability of the relay.

[0023] The energy meter provided by this utility model has a cavity for fixing the current transformer and relay body. The current transformer and the base are respectively provided with guide posts. When installing the first circuit board, the guide posts are inserted into the guide holes to position the installation position of the first circuit board so that the sampling conductive sheet can be accurately inserted into the sampling conductive hole without bending. This ensures that the information output pin is accurately inserted into the information conductive hole, thereby improving the assembly efficiency of the first circuit board. Attached Figure Description

[0024] Figure 1 This is an exploded structural diagram of the first circuit board and base of the energy meter provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the relay body, terminal block and sampling conductive sheet provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the relay body and the current transformer installed in the base according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the relay body and the current transformer provided in this embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the base provided in an embodiment of the present utility model;

[0029] Figure 6 This is an exploded structural diagram of the terminal block assembly and the base provided in this embodiment of the utility model;

[0030] Figure 7 This is a schematic diagram of the connection between the first circuit board and the base, the current transformer and the relay body provided in this embodiment of the utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the current transformer provided in this embodiment of the utility model;

[0032] Figure 9 This is an exploded structural diagram of the second circuit board and the base provided in an embodiment of the present utility model;

[0033] Figure 10 This is a schematic diagram of the mounting structure of the second circuit board and the base provided in an embodiment of the present utility model;

[0034] Figure 11 This is a schematic diagram of the installation structure of the cover and base provided in an embodiment of the present utility model;

[0035] Figure 12 This is a schematic diagram of the internal structure of the electricity meter provided in this embodiment of the utility model;

[0036] Figure 13 This is a first axonometric view of the cover provided in an embodiment of the present utility model;

[0037] Figure 14 This is a second axonometric view of the cover provided in an embodiment of the present utility model.

[0038] In the picture:

[0039] 1. First circuit board; 2. Relay body; 3. Sampling conductive sheet; 4. Terminal block; 5. Fixing component; 6. Current transformer; 7. Base; 8. Guide post; 9. Second circuit board; 10. Cover;

[0040] 11. Guide hole; 12. Sampling conductive hole; 13. Information conductive hole;

[0041] 21. Information output pin; 22. First connector board; 23. Second connector board; 24. Connector block;

[0042] 41. Groove;

[0043] 51. First fixing plate; 52. Second fixing plate; 53. Third fixing plate;

[0044] 61. Snap-fit ​​protrusion;

[0045] 71. Receiving cavity; 72. Support base; 73. Snap-on plate; 74. Snap-on hole; 75. Base plate; 76. Side plate; 77. Terminal mounting base; 771. Rib; 78. Positioning post; 79. Partition plate; 710. Second guide post; 711. Second snap-on component; 712. Second stepped surface; 713. Terminal assembly;

[0046] 81. Flexible gripper;

[0047] 91. Positioning holes;

[0048] 101. First guide post; 102. First snap-fit ​​component; 103. First stepped surface; 104. Connecting plate. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0050] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0053] like Figure 1 and Figure 2 As shown, this embodiment provides a relay, which includes a first circuit board 1, a relay body 2, a sampling conductive sheet 3, a terminal block 4, and a fixing member 5. The terminal block 4 is electrically connected to the relay body 2. One end of the sampling conductive sheet 3 is connected to the terminal block 4, and the other end of the sampling conductive sheet 3 is electrically connected to the first circuit board 1. One end of the fixing member 5 is connected to the relay body 2, and the other end of the fixing member 5 is connected to the other end of the sampling conductive sheet 3, and the fixing member 5 supports the sampling conductive sheet 3.

[0054] The relay provided in this embodiment has a terminal block 4 connected to the first circuit board 1 via a sampling conductive sheet 3, which simplifies the relay assembly process. The relay body 2 is provided with a fixing part 5, which is connected to the sampling conductive sheet 3. The fixing part 5 supports the sampling conductive sheet 3 and prevents the sampling conductive sheet 3 from bending when connected to the first circuit board 1, ensuring that the sampling conductive sheet 3 is fully connected to the first circuit board 1, improving the assembly quality of the relay and reducing the impact on the assembly reliability of the relay.

[0055] In some embodiments, such as Figure 2As shown, the fixing member 5 includes a first fixing plate 51, a second fixing plate 52, and a third fixing plate 53 connected in sequence. The first fixing plate 51 and the second fixing plate 52 are set at an angle, and the third fixing plate 53 is set at an angle to the second fixing plate 52. The third fixing plate 53 is connected to the relay body 2. The first fixing plate 51 has a fixing hole, and the other end of the sampling conductive sheet 3 passes through the fixing hole. The first fixing plate 51 supports the sampling conductive sheet 3. The fixing member 5 has a simple structure and facilitates the connection between the sampling conductive sheet 3 and the first fixing plate 51.

[0056] Optionally, the sampling conductive sheet 3 is disposed on one side of the relay body 2. A first snap-fit ​​plate 22 is provided on the side of the relay body 2 facing the sampling conductive sheet 3. A second snap-fit ​​plate 23 is connected to the end of the first snap-fit ​​plate 22 facing away from the relay body 2. The second snap-fit ​​plate 23 is set at an angle to the first snap-fit ​​plate 22. A snap-fit ​​block 24 is provided at the end of the second snap-fit ​​plate 23 facing away from the first snap-fit ​​plate 22. A third fixing plate 53 is inserted between the snap-fit ​​block 24 and the first snap-fit ​​plate 22, facilitating the connection of the fixing member 5 to the relay body 2, simplifying the assembly steps, and resulting in a simple structure. In other feasible embodiments, the third fixing plate 53 is connected to the relay body 2 by adhesive bonding.

[0057] Terminal block 4 is electrically connected to relay body 2. Both ends of terminal block 4 are located on the outside of relay body 2. One end of sampling conductive piece 3 is riveted to terminal block 4, thus achieving a conductive connection between sampling conductive piece 3 and terminal block 4. Both ends of terminal block 4 located on the outside of relay body 2 are bent upwards, making the entire terminal block 4 a U-shaped structure. One end of sampling conductive piece 3 is inserted into the recessed structure, and sampling conductive piece 3 is riveted to the inner wall of the recessed structure.

[0058] This embodiment also provides an electricity meter, such as Figures 3 to 5 As shown, the electricity meter includes a base 7, a current transformer 6, and the aforementioned relay. One end of the terminal block 4 passes through the current transformer 6. The base 7 has a receiving cavity 71, within which the current transformer 6 and the relay body 2 are housed. The receiving cavity 71 positions the current transformer 6 and the relay body 2 on the base 7. The terminal block 4 and the current transformer 6 are fitted with a clearance fit, allowing the relative positions of the current transformer 6 and the relay body 2 to be adjusted.

[0059] Optionally, the base 7 includes a base plate 75, with side plates 76 on one opposite side of the base plate 75 and terminal mounting seats 77 on the other opposite side of the base plate 75. The terminal mounting seats 77, side plates 76, and base plate 75 together form a receiving cavity 71. Figure 6As shown, the terminal mounting base 77 is equipped with a terminal assembly 713. The terminal assembly 713 is an existing structure and will not be described in detail here. The two ends of the terminal block 4 are connected to the terminal assembly 713 in the terminal mounting base 77 on the corresponding side. The opposite side walls of the terminal mounting base 77 are provided with protruding ribs 771, and the two sides of the terminal block 4 are recessed with grooves 41. The protruding ribs 771 are engaged in the grooves 41, which serves to fix the terminal block 4.

[0060] Combination Figure 3 , Figure 4 and Figure 7 As shown, the current transformer 6 and the base 7 are respectively provided with guide posts 8. Specifically, the terminal mounting base 77 is provided with guide posts 8. The first circuit board 1 is provided with guide holes 11, sampling conductive holes 12 and information conductive holes 13. The guide posts 8 are inserted into the guide holes 11, the sampling conductive sheet 3 is inserted into the sampling conductive holes 12, and the relay body 2 is provided with an information output pin 21, which is inserted into the information conductive holes 13. When installing the first circuit board 1, the guide posts 8 are inserted into the guide holes 11 to position the first circuit board 1 so that the sampling conductive sheet 3 can be accurately inserted into the sampling conductive holes 12 without bending, and the information output pin 21 can be accurately inserted into the information conductive holes 13, thereby improving the assembly efficiency of the first circuit board 1.

[0061] The guide posts 8 on the current transformer 6 and the base 7 are distributed separately, and the specific location of the guide posts 8 is not limited. At least one of the guide posts 8 has an elastic claw 81 at its end. After the elastic claw 81 passes through the guide hole 11, the elastic claw 81 is engaged with the first circuit board 1, fixing the first circuit board 1 to the base 7.

[0062] like Figure 3 , Figure 5 and Figure 8 As shown, a support base 72 is provided at the bottom of the receiving cavity 71. The surface shape of the support base 72 is adapted to the bottom surface shape of the current transformer 6, effectively supporting the current transformer 6. Typically, the bottom surface of the current transformer 6 is arc-shaped. The support base 72 is provided to limit the movement of the current transformer 6 and prevent it from rolling within the receiving cavity 71. On opposite sides of the support base 72, there are snap-fit ​​plates 73 with snap-fit ​​holes 74. On opposite sides of the current transformer 6, there are snap-fit ​​protrusions 61. The snap-fit ​​protrusions 61 engage with the snap-fit ​​holes 74, fixing the current transformer 6 within the receiving cavity 71.

[0063] Optionally, the terminal mounting base 77 on one side of the base plate 75 is spaced apart from the side plate 76. One end of the current transformer 6 is inserted between the terminal mounting base 77 and the side plate 76 to prevent the current transformer 6 from shifting relative to the base plate 75. The other end of the current transformer 6 is supported on the support base 72 to prevent the current transformer 6 from rolling in the receiving cavity 71, thereby realizing multi-directional limitation of the current transformer 6.

[0064] For example, the electricity meter is a three-phase electricity meter, and the electricity meter is equipped with three relays. The number of current transformer coils of the current transformer 6 corresponds one-to-one with the number of relay bodies 2, that is, there are three current transformer coils. The outer side of the three current transformer coils is provided with a shell. The bottom surface of the shell is three continuously arranged arc surfaces. The current transformer coil in the middle protrudes from the surface of the other two current transformer coils. The protruding part of the current transformer coil is supported on the support base 72. The rest of the current transformer 6 is placed between the terminal mounting base 77 and the side plate 76.

[0065] The cavity 71 is provided with a partition plate 79, which is located between two adjacent relay bodies 2 to isolate the two adjacent relay bodies 2, thereby providing insulation and increasing the creepage distance between the two relay bodies 2.

[0066] In some embodiments, such as Figure 9 and Figure 10 As shown, the electricity meter also includes a second circuit board 9. The end of the side plate 76 is provided with a positioning post 78. The second circuit board 9 is provided with a positioning hole 91. The positioning post 78 is inserted into the positioning hole 91, which realizes the positioning and installation of the second circuit board 9 and has a simple structure.

[0067] In some embodiments, such as Figures 11 to 13 As shown, the electricity meter also includes a cover 10. The cover 10 has a first guide post 101 and a first snap-fit ​​member 102. The base 7 has a second guide post 710 and a second snap-fit ​​member 711. One of the first guide post 101 and the second guide post 710 has a insertion hole, and the other of the first guide post 101 and the second guide post 710 is inserted into the insertion hole. The first snap-fit ​​member 102 snaps into the second snap-fit ​​member 711. The cover 10 covers the outside of the relay body 2 and the current transformer 6. The cover 10 protects the relay body 2 and the current transformer 6. The first guide post 101 and the second guide post 710 provide guidance for installing the cover 10, facilitating quick and accurate installation of the cover 10 onto the base 7, thus improving the installation efficiency of the cover 10. The first snap-fit ​​member 102 cooperates with the second snap-fit ​​member 711 to fix the cover 10 onto the base 7. Optionally, one of the first snap-fit ​​component 102 and the second snap-fit ​​component 711 can be a snap-fit ​​hole and the other can be a snap-fit ​​buckle, with the snap-fit ​​buckle snapping into the snap-fit ​​hole.

[0068] Optionally, such as Figure 12 and Figure 14 As shown, the edge of the cover 10 that contacts the base 7 has a first stepped surface 103, and the base 7 has a second stepped surface 712, which is coupled to the first stepped surface 103. The first stepped surface 103 and the second stepped surface 712 cooperate to limit the relative position of the cover 10 and the base 7, and also to seal the contact surface between the cover 10 and the base 7.

[0069] For example, the cover 10 has a U-shaped structure with openings on two sides. First guide posts 101 are provided on the inner sides of the other two sides of the cover 10. Second guide posts 710 are provided between two adjacent terminal mounting seats 77. The other two side walls of the cover 10 are located outside the terminal mounting seats 77, and the side walls of the cover 10 have wiring ports corresponding to the terminal mounting seats 77. Connecting plates 104 are provided on opposite sides of the openings of the cover 10. Two connecting plates 104 located on the same side of the cover 10 extend in opposite directions. First snap-fit ​​members 102 are provided on the connecting plates 104, and second snap-fit ​​members 711 are provided on the outer side wall of the outer terminal mounting seats 77.

[0070] The aforementioned electricity meter is easy to assemble, simplifies the assembly process, and improves the assembly reliability of the electricity meter.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A relay, characterized in that, include: First circuit board (1); Relay body (2); Sampling conductive sheet (3); Terminal block (4) is electrically connected to the relay body (2), one end of the sampling conductive piece (3) is connected to the terminal block (4), and the other end of the sampling conductive piece (3) is electrically connected to the first circuit board (1); The fixing member (5) is connected at one end to the relay body (2) and at the other end to the sampling conductive sheet (3), and the fixing member (5) supports the sampling conductive sheet (3).

2. The relay according to claim 1, characterized in that, The fixing member (5) includes a first fixing plate (51), a second fixing plate (52) and a third fixing plate (53) connected in sequence. The first fixing plate (51) and the second fixing plate (52) are set at an angle, and the third fixing plate (53) and the second fixing plate (52) are set at an angle. The third fixing plate (53) is connected to the relay body (2). The first fixing plate (51) is provided with a fixing hole, and the other end of the sampling conductive sheet (3) passes through the fixing hole.

3. The relay according to claim 2, characterized in that, The sampling conductive sheet (3) is disposed on one side of the relay body (2). The relay body (2) has a first snap-fit ​​plate (22) on the side facing the sampling conductive sheet (3). A second snap-fit ​​plate (23) is connected to the end of the first snap-fit ​​plate (22) away from the relay body (2). The second snap-fit ​​plate (23) is set at an angle to the first snap-fit ​​plate (22). A snap-fit ​​block (24) is disposed at the end of the second snap-fit ​​plate (23) away from the first snap-fit ​​plate (22). The third fixing plate (53) is inserted between the snap-fit ​​block (24) and the first snap-fit ​​plate (22).

4. An electricity meter, characterized in that, The energy meter includes a base (7), a current transformer (6), and a relay as described in claim 1, 2, or 3. One end of the terminal block (4) passes through the current transformer (6). The base (7) has a receiving cavity (71). The current transformer (6) and the relay body (2) are disposed in the receiving cavity (71). The current transformer (6) and the base (7) are respectively provided with guide posts (8). The first circuit board (1) is provided with a guide hole (11), a sampling conductive hole (12), and an information conductive hole (13). The guide post (8) is inserted into the guide hole (11). The sampling conductive piece (3) is inserted into the sampling conductive hole (12). The relay body (2) is provided with an information output pin (21). The information output pin (21) is inserted into the information conductive hole (13). One end of the sampling conductive piece (3) is riveted to the terminal block (4).

5. The electricity meter according to claim 4, characterized in that, The bottom of the receiving cavity (71) is provided with a support base (72), the surface shape of the support base (72) is adapted to the bottom surface shape of the current transformer (6), and the support base (72) is provided with a snap-fit ​​plate (73) on both sides opposite to each other. The snap-fit ​​plate (73) is provided with a snap-fit ​​hole (74), and the current transformer (6) is provided with a snap-fit ​​protrusion (61) on both sides opposite to each other. The snap-fit ​​protrusion (61) is snapped into the snap-fit ​​hole (74).

6. The electricity meter according to claim 5, characterized in that, The base (7) includes a base plate (75), with side plates (76) on one opposite side of the base plate (75) and terminal mounting seats (77) on the other opposite side of the base plate (75). The terminal mounting seats (77), the side plates (76) and the base plate (75) surround and form the receiving cavity (71). The terminal mounting seat (77) on one side is spaced apart from the side plate (76). One end of the current transformer (6) is inserted between the terminal mounting seat (77) and the side plate (76), and the other end of the current transformer (6) is supported on the support base (72). The first circuit board (1) is disposed between the two side plates (76).

7. The electricity meter according to claim 6, characterized in that, The electricity meter also includes a second circuit board (9), and the end of the side plate (76) is provided with a positioning post (78). The second circuit board (9) is provided with a positioning hole (91), and the positioning post (78) is inserted into the positioning hole (91).

8. The electricity meter according to claim 4, characterized in that, The cavity (71) is provided with a partition plate (79), which is located between two adjacent relay bodies (2).

9. The electricity meter according to claim 4, characterized in that, The energy meter also includes a cover (10), on which a first guide post (101) and a first snap-fit ​​member (102) are provided. The base (7) is provided with a second guide post (710) and a second snap-fit ​​member (711). One of the first guide post (101) and the second guide post (710) is provided with a plug hole. The other of the first guide post (101) and the second guide post (710) is inserted into the plug hole. The first snap-fit ​​member (102) is snapped into the second snap-fit ​​member (711). The cover (10) covers the outside of the relay body (2) and the current transformer (6).

10. The electricity meter according to claim 9, characterized in that, The edge of the cover (10) that contacts the base (7) is provided with a first stepped surface (103), and the base (7) is provided with a second stepped surface (712), which is coupled to the first stepped surface (103).

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