Electric energy meter

Abstract

The utility model provides an electric energy meter, relates to the technical field of electrical instruments and meters, and is used for ensuring the connection stability between a circuit board and a shell while effectively improving the installation efficiency of the electric energy meter. The electric energy meter comprises a first housing, a second housing and a circuit board. An accommodating cavity is defined by the first shell and the second shell, and the circuit board is arranged in the accommodating cavity; the circuit board is provided with a first surface and a second surface which are oppositely arranged; a plurality of first limiting pieces are arranged in the first shell, and one ends of the first limiting pieces abut against the first surface; a plurality of second limiting pieces are arranged in the second shell, and one ends of the second limiting pieces abut against the second surface.

Description

Technical Field

[0001] This application relates to the field of electrical instruments and meters, specifically to an electricity meter. Background Technology

[0002] An electricity meter typically consists of a housing and a circuit board installed inside the housing.

[0003] In existing technologies, circuit boards are often mounted to the housing using screws. This has two drawbacks: firstly, the installation of screws requires considerable manpower, reducing the efficiency of electricity meter installation; secondly, in environments with vibration or temperature changes, the screws may gradually loosen, leading to unstable connections between the circuit board and the housing. Utility Model Content

[0004] This application provides an electricity meter that effectively improves the installation efficiency of the electricity meter while ensuring the stability of the connection between the circuit board and the housing.

[0005] To achieve the above objectives, this application provides an electricity meter, including a first housing, a second housing, and a circuit board; the first housing and the second housing surround to form a receiving cavity, and the circuit board is disposed in the receiving cavity; the circuit board has a first surface and a second surface disposed opposite to each other; a plurality of first limiting members are disposed in the first housing, one end of the first limiting member abutting against the first surface; a plurality of second limiting members are disposed in the second housing, one end of the second limiting member abutting against the second surface.

[0006] When the above technical solution is adopted, the circuit board has a first surface and a second surface that are arranged opposite to each other. In actual installation, the circuit board can be placed between the first housing and the second housing, such that one end of the first limiting member is pressed against the first surface and one end of the second limiting member is pressed against the second surface.

[0007] At this point, the circuit board is clamped between the first and second limiting members, and is pressed and limited. Thus, after connecting the first and second housings together, the circuit board can be installed into the receiving cavity.

[0008] As can be seen from the above, the circuit board can be installed in the housing cavity in one step without any other installation steps. The circuit board can be installed between the first housing and the second housing, which can effectively improve the installation efficiency of the electricity meter while ensuring the stability of the connection between the circuit board and the first and second housings.

[0009] Compared to the prior art where screws are used to install the circuit board onto the first and second housings, and then the first and second housings are connected, the energy meter provided in this application only requires placing the circuit board between the first and second housings and connecting the first and second housings to complete the installation of the circuit board.

[0010] In this application, the installation step of connecting the circuit board to the first or second housing with screws is omitted, which simplifies the operation, saves manpower, and improves the installation efficiency of the electricity meter.

[0011] In addition, since no screws are needed to fix the circuit board, there is no risk of the circuit board becoming unstable relative to the first and second housings due to loose screws in environments with vibration or temperature changes.

[0012] In one possible implementation, at least one end of the first limiting member that is in abutting contact with the first surface is provided with a limiting post; a limiting hole that mates with the limiting post is provided on the circuit board.

[0013] When the above technical solution is adopted, the circuit board is placed between the first housing and the second housing, and the first limiting member and the second limiting member are in close contact with the circuit board, and the limiting post is inserted into the limiting hole.

[0014] The combination of limit posts and limit holes can enhance the stability of the circuit board and improve the structural strength of the electricity meter.

[0015] In one possible implementation, the length of the limiting post is greater than half the thickness of the circuit board.

[0016] When the above technical solution is adopted, the contact area between the limiting post and the circuit board can be ensured, and the stability and positional accuracy of the circuit board set on the first housing and the second housing can be improved.

[0017] In one possible implementation, the length of the limiting post is less than or equal to the thickness of the circuit board.

[0018] When the above technical solution is adopted, when the limiting post and the limiting hole are engaged, the end of the limiting post away from the first limiting member will not protrude from the second surface of the circuit board, thereby avoiding interference between the limiting post and other components of the energy meter.

[0019] In one possible implementation, a baffle extending into the second housing is provided on the side wall of the first housing; the side of the baffle facing the receiving space is used to make limiting contact with one side of the circuit board.

[0020] When the above technical solution is adopted, the baffle is set so that when the first surface and the second surface of the circuit board are pressed against the first limiting member and the second limiting member respectively, one side of the circuit board is limited by the baffle, which can improve the stability and positional accuracy of the circuit board set on the first housing and the second housing.

[0021] In one possible implementation, the dimension of the baffle in the direction from the first housing to the second housing is greater than the thickness of the circuit board.

[0022] When the above technical solution is adopted, the contact area between the baffle and the side of the circuit board is ensured, the contact firmness between the baffle and the circuit board is improved, and the stability and positional accuracy of the circuit board set on the first housing and the second housing are improved.

[0023] In one possible implementation, the second limiting member is a plate-like structure, and the surface of the second limiting member is parallel to the direction from the first housing to the second housing.

[0024] When the above technical solution is adopted, the end of the second limiting member that contacts the circuit board is elongated, which ensures the contact area between the second limiting member and the circuit board. On the one hand, this reduces the stress on the circuit board caused by the second limiting member. On the other hand, it improves the stability of the second limiting member in limiting the circuit board. Furthermore, it enhances the stability and positional accuracy of the circuit board mounted on the first and second housings.

[0025] In one possible implementation, the second limiting member includes a first limiting plate, a second limiting plate, and a third limiting plate connected in sequence, with the surfaces of the first limiting plate, the second limiting plate, and the third limiting plate all being parallel to the direction from the first housing to the second housing.

[0026] By adopting the above technical solution, the contact area between the second limiting member and the circuit board can be increased, thereby improving the stability of the second limiting member in limiting the circuit board. Furthermore, it enhances the stability and positional accuracy of the circuit board mounted on the first and second housings.

[0027] In one possible implementation, a rectangular space with one end open is formed between the second housing and the first limiting plate, the second limiting plate, and the third limiting plate of at least one second limiting member, with the opening of the rectangular space facing the first housing.

[0028] When the above technical solution is adopted, the electronic components of the electricity meter can be installed in the rectangular space, and the first limiting plate, the second limiting plate and the third limiting plate play a protective role for the electronic components installed in the rectangular space.

[0029] In one possible implementation, a through hole is provided on the second housing at the location of the terminal block on the circuit board; the first limiting plate, the second limiting plate, and the third limiting plate of one of the second limiting members are arranged circumferentially along the through hole.

[0030] When the above technical solution is adopted, the through hole allows the wiring terminals to be exposed outside the second housing, facilitating the connection of the energy meter to external equipment. Simultaneously, the first, second, and third limiting plates protect the electronic components housed within the receiving cavity. Attached Figure Description

[0031] Figure 1This is a schematic diagram of an electricity meter provided in an embodiment of this application.

[0032] Figure 2 Schematic diagram of the first housing provided for embodiments of this application Figure 1 .

[0033] Figure 3 Schematic diagram of the first housing provided for embodiments of this application Figure 2 .

[0034] Figure 4 Schematic diagram of the second housing provided for embodiments of this application Figure 1 .

[0035] Figure 5 Schematic diagram of the second housing provided for embodiments of this application Figure 2 .

[0036] Figure 6 This is a schematic diagram of a circuit board provided in an embodiment of this application.

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

[0038] 1-First housing, 2-Second housing, 21-Through hole, 3-Circuit board, 31-Limiting hole, 32-Terminal block

[0039] 4-First limiting component, 5-Second limiting component, 51-First limiting plate, 52-Second limiting plate, 53-Third limiting plate

[0040] 6-Limiting post, 7-Baffle. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0043] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They 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. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0046] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0047] In existing technology, the casing of an electricity meter generally includes a first casing and a second casing arranged opposite each other. During the actual installation of the electricity meter, the circuit board is often mounted onto the casing using screws, and then the first and second casings are connected.

[0048] During installation, tightening screws may apply mechanical stress to the circuit board, which, if not done evenly, can cause deformation or even damage. Furthermore, when the electricity meter needs repair, repeatedly tightening and loosening the screws increases the likelihood of stripped screw threads.

[0049] In view of the above-mentioned technical problems existing in the prior art, please refer to Figure 1 As shown in the figure, this application embodiment provides an electricity meter, which includes a first housing 1, a second housing 2, and a circuit board 3.

[0050] The materials of the first housing 1 and the second housing 2 are not specifically limited here. For example, the first housing 1 and the second housing 2 can be made of plastic.

[0051] The structure of the first shell 1 and the second shell 2 can generally be set as a cuboid structure, but in practice it is not limited to this.

[0052] Please combine Figures 2 to 5 As shown, both the first housing 1 and the second housing 2 have open cavities. When connecting the first housing 1 and the second housing 2, the open end of the first housing 1 can face the second housing 2, and the open end of the second housing 2 can face the first housing 1. The first housing 1 and the second housing 2 are fastened together, and furthermore, screws can be used to secure the first housing 1 and the second housing 2 together.

[0053] Thus, the first housing 1 and the second housing 2 are arranged to form a receiving cavity, and the circuit board 3 is disposed in the receiving cavity.

[0054] In practice, other electronic components of the electricity meter can also be housed within the housing cavity. The first housing 1 and the second housing 2 can accommodate and enclose the circuit board 3, providing a stable space for the circuit board 3 to ensure that it can operate normally without external interference.

[0055] Meanwhile, the first housing 1 and the second housing 2 can provide positioning and support for the circuit board 3, preventing the components housed in the cavity from shifting or being damaged during operation. The first housing 1 and the second housing 2 can also withstand a certain amount of external pressure, protecting the circuit board 3 from damage.

[0056] In addition, the first housing 1 and the second housing 2 have protective functions, which can prevent moisture, dust, dirt and other impurities from the outside of the first housing 1 and the second housing 2 from entering the cavity, thereby avoiding corrosion or damage to the circuit board 3.

[0057] like Figure 6 As shown, the circuit board 3 is generally configured as a rectangular plate structure. The circuit board 3 has a first surface and a second surface arranged opposite to each other. The first surface and the second surface are parallel, and when the circuit board 3 is placed in the receiving cavity, the first surface and the second surface can be perpendicular to the direction from the first housing 1 to the second housing 2. The direction from the first surface to the second surface is parallel to the direction from the first housing 1 to the second housing 2.

[0058] In a specific implementation, the first surface can be oriented towards the cavity of the first housing 1, and the second surface can be oriented towards the cavity of the second housing 2. Of course, the first surface can also be oriented towards the cavity of the second housing 2, and the second surface towards the cavity of the first housing 1, depending on the actual situation.

[0059] In the embodiments provided in this application, the first surface is disposed facing the cavity of the first housing 1, and the second surface is disposed facing the cavity of the second housing 2.

[0060] refer to Figure 2 and Figure 3 As shown, a plurality of first limiting members 4 are provided inside the first housing 1, and one end of the first limiting member 4 is pressed against the first surface.

[0061] The first limiting member 4 is located inside the cavity of the first housing 1. One end of the first limiting member 4 is pressed against the first surface, and the other end of the first limiting member 4 is disposed on the first housing 1. The manner in which the first limiting member 4 is disposed on the first housing 1 is not specifically limited here.

[0062] For example, the connection between the first limiting member 4 and the first housing 1 can be welding, riveting, threaded connection, etc. Of course, in actual processing, the first limiting member 4 can also be integrally processed with the first housing 1.

[0063] The other end of the first limiting member 4 can be connected to the shell wall of the first housing 1 that is away from the second housing 2. Of course, the other end of the first limiting member 4 can also be connected to the side wall of the first housing 1.

[0064] The specific location of the first limiting member 4 is not limited here, but is determined to ensure that one end of the first limiting member 4 is in tight contact with the first surface and does not interfere with other components inside the electricity meter.

[0065] The number of first limiting members 4 can be two, three, four or more, depending on the actual situation. It should be noted that the contact position between the first limiting member 4 and the circuit board 3 is not specifically limited here, as long as the circuit board 3 can be stably placed in the receiving cavity.

[0066] In the embodiments provided in this application, such as Figure 2 and Figure 3 As shown, there are three first limiting members 4, one of which is used to make tight contact with one end of the circuit board 3 along its length, and the other two are used to make tight contact with the other end of the circuit board 3 along its length.

[0067] It should also be noted that the other two first limiting members 4 are respectively used to make tight contact with both ends of the circuit board 3 in the width direction. This arrangement ensures that the circuit board 3 is subjected to uniform force and thus ensures the stability of the circuit board 3.

[0068] The structure of the first limiting member 4 is not specifically limited here. For example, the first limiting member 4 can be a plate-like structure, a polygonal prism-like structure, etc.

[0069] In practice, the structures of multiple first limiting members 4 can be the same, or they can be different.

[0070] In the embodiments provided in this application, please refer to Figure 2 and Figure 3The first limiting member 4 is a cylindrical structure.

[0071] This design saves on raw material usage. Furthermore, the cylindrical structure of the first limiting member 4 ensures even stress distribution, reduces stress concentration, and enhances its strength and durability. Additionally, the cylindrical shape of the first limiting member 4 reduces its space requirements and prevents interference with other components within the electricity meter.

[0072] Furthermore, when the first limiting member 4 is cylindrical, the end of the first limiting member 4 that is in close contact with the circuit board 3 is also cylindrical. This means that the area in contact between the circuit board 3 and the first limiting member 4 is circular. This allows for a more uniform distribution of stress on the circuit board 3 from the first limiting member 4, reducing stress concentration and minimizing damage to the circuit board 3.

[0073] refer to Figure 5 As shown, a plurality of second limiting members 5 are provided inside the second housing 2, and one end of the second limiting member 5 is pressed against the second surface.

[0074] The second limiting member 5 is located inside the second housing 2. One end of the second limiting member 5 is pressed against the second surface, and the other end of the second limiting member 5 is disposed on the second housing 2. The manner in which the second limiting member 5 is disposed on the second housing 2 is not specifically limited here.

[0075] For example, the connection between the second limiting member 5 and the second housing 2 can be welding, riveting, threaded connection, etc. Of course, in actual processing, the second limiting member 5 can also be integrally formed with the second housing 2.

[0076] The other end of the second limiting member 5 can be connected to the shell wall of the second housing 2 that is away from the first housing 1. Of course, the other end of the second limiting member 5 can also be connected to the side wall of the second housing 2.

[0077] The location of the second limiting member 5 is not specifically limited here, but is determined to ensure that one end of the second limiting member 5 is in tight contact with the second surface and does not interfere with other components inside the electricity meter.

[0078] The number of second limiting members 5 can be two, three, four or more, depending on the actual situation. It should be noted that the contact position between the second limiting member 5 and the circuit board 3 is not specifically limited here, as long as the circuit board 3 can be stably placed in the receiving cavity.

[0079] In the embodiments provided in this application, such as Figure 5As shown, there are three second limiting members 5, one of which is used to make tight contact with one end of the circuit board 3 along its length, and the other two are used to make tight contact with the other end of the circuit board 3 along its length.

[0080] This configuration ensures that the circuit board 3 is subjected to uniform force, thus ensuring the stability of the circuit board 3.

[0081] The structure of the second limiting member 5 is not specifically limited here. For example, the second limiting member 5 can be a triangular structure, a polygonal prism structure, etc.

[0082] In practice, the structures of multiple second limiting members 5 can be the same, or they can be different.

[0083] The energy meter provided in this application embodiment has a circuit board 3 with a first surface and a second surface arranged opposite to each other. In actual installation, the circuit board 3 can be placed between the first housing 1 and the second housing 2, such that one end of the first limiting member 4 is pressed against the first surface and one end of the second limiting member 5 is pressed against the second surface.

[0084] At this point, the circuit board 3 is clamped between the first limiting member 4 and the second limiting member 5, and the circuit board 3 is pressed and limited. In this way, after the first housing 1 and the second housing 2 are connected together, the circuit board 3 can be installed in the receiving cavity.

[0085] As can be seen from the above, the circuit board 3 can be installed in the receiving cavity in one step without any other installation steps. The circuit board 3 can be installed between the first housing 1 and the second housing 2. While ensuring the stability of the connection between the circuit board 3 and the first housing 1 and the second housing 2, the installation efficiency of the electricity meter can be effectively improved.

[0086] Compared to the prior art where screws are used to install the circuit board 3 on the first housing 1 and the second housing 2, and then the first housing 1 and the second housing 2 are connected, the energy meter provided in this application embodiment only requires placing the circuit board 3 between the first housing 1 and the second housing 2, and then connecting the first housing 1 and the second housing 2 to complete the installation of the circuit board 3.

[0087] Compared with the prior art, this application omits the installation step of connecting the circuit board 3 to the first housing 1 or the second housing 2 with screws, which simplifies the operation, saves manpower, and improves the installation efficiency of the electricity meter.

[0088] In addition, since there is no need to use screws to fix the circuit board 3, it will not be in an environment of vibration or temperature change, and the circuit board 3 will not be unstable relative to the first housing 1 and the second housing 2 due to loose screws. This ensures the stability of the connection between the circuit board 3 and the first housing 1 and the second housing 2.

[0089] During disassembly, only the first housing 1 and the second housing 2 need to be removed to separate them, allowing the circuit board 3 to be removed. There is no need to repeatedly tighten or loosen the screws, and there is no risk of stripped screws.

[0090] In one possible implementation, combining Figure 2 and Figure 3 As shown, at least one end of the first limiting member 4, which is in tight contact with the first surface, is provided with a limiting post 6. Meanwhile, as... Figure 6 As shown, the circuit board 3 has a limiting hole 31 that cooperates with the limiting post 6.

[0091] Thus, when the circuit board 3 is placed between the first housing 1 and the second housing 2, and both the first limiting member 4 and the second limiting member 5 are in close contact with the circuit board 3, the limiting post 6 is inserted into the limiting hole 31.

[0092] The combination of the limiting post 6 and the limiting hole 31 can enhance the stability of the circuit board 3 and improve the structural strength of the electricity meter.

[0093] In practice, the number of limiting posts 6 can be one, two, three or more, and no specific limitation is made here. It should be noted that one limiting post 6 is provided on one first limiting member 4, and the number of limiting posts 6 is less than or equal to the number of first limiting members 4.

[0094] The number of limiting holes 31 is the same as the number of limiting posts 6, and one limiting hole 31 corresponds to one limiting post 6. The setting position of the limiting hole 31 corresponds to the setting position of the limiting post 6.

[0095] The size of the limiting hole 31 matches the size of the limiting post 6. At the same time, the size of the limiting hole 31 is smaller than the size of the end of the first limiting member 4 that is used to press against the first surface, so as to prevent one end of the first limiting member 4 from extending into the limiting hole 31 and ensure that the first limiting member 4 can press against the first surface.

[0096] The connection method between the limiting post 6 and the first limiting member 4 can be threaded connection, welding or integral machining, etc., and no specific limitation is made here.

[0097] In some embodiments, the length of the limiting post 6 is greater than half the thickness of the circuit board 3.

[0098] This ensures the contact area between the limiting post 6 and the circuit board 3, improving the stability and positional accuracy of the circuit board 3 mounted on the first housing 1 and the second housing 2.

[0099] It should be noted that the thickness of circuit board 3 refers to the vertical distance between the first surface and the second surface. The length of the limiting post 6 refers to the dimension of the limiting post 6 in the direction from the first housing 1 to the second housing 2.

[0100] As an example, the length of the limiting post 6 is less than or equal to the thickness of the circuit board 3.

[0101] Thus, when the limiting post 6 and the limiting hole 31 are engaged, the end of the limiting post 6 that is away from the first limiting member 4 will not protrude from the second surface of the circuit board 3, thereby avoiding interference between the limiting post 6 and other components of the energy meter.

[0102] In practice, the length of the limiting post 6 is greater than half the thickness of the circuit board 3, while the length of the limiting post 6 is less than or equal to the thickness of the circuit board 3. This ensures the contact area between the limiting post 6 and the circuit board 3, improving the stability and positional accuracy of the circuit board 3 on the first housing 1 and the second housing 2, while preventing the limiting post 6 from interfering with other components of the energy meter.

[0103] As a feasible approach, such as Figure 2 and Figure 3 As shown, a baffle 7 extending toward the second housing 2 is provided on the side wall of the first housing 1. The side of the baffle 7 facing the accommodating space is used to limit contact with one side of the circuit board 3.

[0104] Thus, with the baffle 7 in place, when the first and second surfaces of the circuit board 3 are pressed against the first limiting member 4 and the second limiting member 5 respectively, one side of the circuit board 3 is limited by the baffle 7, which can improve the stability and positional accuracy of the circuit board 3 on the first housing 1 and the second housing 2.

[0105] In a specific implementation, a baffle 7 can be provided on one side wall of the first housing 1, and the baffle 7 can make limiting contact with one side of the circuit board 3 along the length direction of the circuit board 3.

[0106] The baffle 7 can be integrally formed with the first housing 1, or it can be welded onto the first housing 1. Of course, it is not limited to this in practice, and the specific method shall prevail.

[0107] As one possible implementation, the baffle 7 is larger in size than the thickness of the circuit board 3 in the direction from the first housing 1 to the second housing 2.

[0108] This ensures the contact area between the baffle 7 and the side of the circuit board 3, improves the contact firmness between the baffle 7 and the circuit board 3, and enhances the stability and positional accuracy of the circuit board 3 mounted on the first housing 1 and the second housing 2.

[0109] In one example, such as Figure 5As shown, the second limiting member 5 is a plate-shaped structure, and the surface of the second limiting member 5 is parallel to the direction from the first housing 1 to the second housing 2.

[0110] Thus, the elongated shape of the end of the second limiting member 5 that contacts the circuit board 3 ensures a sufficient contact area between the second limiting member 5 and the circuit board 3. This reduces the stress on the circuit board 3 caused by the second limiting member 5 and improves the stability of the second limiting member 5 in limiting the circuit board 3. Furthermore, it enhances the stability and positional accuracy of the circuit board 3 mounted on the first housing 1 and the second housing 2.

[0111] In another example, such as Figure 5 As shown, the second limiting member 5 includes a first limiting plate 51, a second limiting plate 52 and a third limiting plate 53 connected in sequence. The surfaces of the first limiting plate 51, the second limiting plate 52 and the third limiting plate 53 are all parallel to the direction from the first housing 1 to the second housing 2.

[0112] In this case, the contact area between the second limiting member 5 and the circuit board 3 can be increased, improving the stability of the second limiting member 5 in limiting the circuit board 3. Furthermore, this improves the stability and positional accuracy of the circuit board 3 mounted on the first housing 1 and the second housing 2.

[0113] In some embodiments, such as Figure 5 As shown, a rectangular space with one end open is formed between the second housing 2 and the first limiting plate 51, the second limiting plate 52 and the third limiting plate 53 of at least one second limiting member 5, and the opening of the rectangular space faces the first housing 1.

[0114] At this time, electronic components of the electricity meter can be installed in the rectangular space, and the first limiting plate 51, the second limiting plate 52 and the third limiting plate 53 play a protective role for the electronic components installed in the rectangular space.

[0115] Furthermore, at the location of the terminal block 32 on the corresponding circuit board 3, a through hole 21 is provided on the second housing 2, such as... Figure 4 and Figure 5 As shown, this allows the wiring terminal 32 to be exposed outside the second housing 2, facilitating the connection of the energy meter to external devices.

[0116] In fact, the through hole 21 is opened on the shell wall of the second shell 2, away from the first shell 1.

[0117] In specific implementation, such as Figure 5 As shown, the first limiting plate 51, the second limiting plate 52, and the third limiting plate 53 of one of the second limiting members 5 are arranged along the circumference of the through hole 21.

[0118] Thus, the first limiting plate 51, the second limiting plate 52, and the third limiting plate 53 can protect the electronic components housed in the receiving cavity.

[0119] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. An electric energy meter, characterized by, The device includes a first housing, a second housing, and a circuit board; the first housing and the second housing surround a receiving cavity, and the circuit board is disposed in the receiving cavity; the circuit board has a first surface and a second surface disposed opposite to each other; a plurality of first limiting members are disposed in the first housing, one end of the first limiting member abutting against the first surface; a plurality of second limiting members are disposed in the second housing, one end of the second limiting member abutting against the second surface.

2. The electric energy meter according to claim 1, characterized in that, At least one of the first limiting members has a limiting post at one end for pressing against the first surface; the circuit board has a limiting hole that mates with the limiting post.

3. The electric energy meter of claim 2, wherein, The length of the limiting post is greater than half the thickness of the circuit board.

4. The electric energy meter of claim 2, wherein, The length of the limiting post is less than or equal to the thickness of the circuit board.

5. The electric energy meter of claim 1, wherein, A baffle extending into the second housing is provided on the side wall of the first housing; the side of the baffle facing the receiving cavity is used to make limiting contact with one side of the circuit board.

6. The electric energy meter of claim 5, wherein, The dimension of the baffle in the direction from the first housing to the second housing is greater than the thickness of the circuit board.

7. The electric energy meter of claim 1, wherein, The second limiting member is a plate-shaped structure, and the surface of the second limiting member is parallel to the direction from the first housing to the second housing.

8. The electric energy meter of claim 1, wherein, The second limiting member includes a first limiting plate, a second limiting plate, and a third limiting plate connected in sequence. The surfaces of the first limiting plate, the second limiting plate, and the third limiting plate are all parallel to the direction from the first housing to the second housing.

9. The electric energy meter of claim 8, wherein, The second housing and the first limiting plate, the second limiting plate and the third limiting plate of at least one second limiting member form a rectangular space with one end open, the opening of the rectangular space facing the first housing.

10. The electric energy meter of claim 8, wherein, A through hole is provided on the second housing at the position of the terminal block on the circuit board; the first limiting plate, the second limiting plate, and the third limiting plate of one of the second limiting members are arranged circumferentially along the through hole.

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