Circuit board and guide rail ammeter

Abstract

The utility model provides a circuit board and a guide rail ammeter, and belongs to the technical field of electrical equipment. The circuit board is applied to the guide rail ammeter. The guide rail ammeter comprises a base. The circuit board comprises a body and a wire arrangement structure. The body is arranged on the base and comprises a first face and a second face which are opposite in position, the first face is opposite to the bottom wall of the base, the second face faces the bottom wall of the base, and a welding structure is arranged on the first face. The wire arrangement structure is arranged on the body and on the side, close to the edge of the body, of the welding structure, the wire arrangement structure can communicate with the first face and the second face, and the wire arrangement structure can provide a penetrating space for the voltage wire, so that one end of the voltage wire is connected to the base, and the other end of the voltage wire is connected to the welding structure. According to the guide rail electric meter, the voltage line penetrates through the body and is connected with the first surface, so that the voltage line can be straightened, the possibility that the voltage line is stacked between the second surface and the base is reduced, the probability of short circuit caused by damage of the voltage line can be reduced, and the use reliability of the guide rail electric meter is improved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a circuit board and a rail-mounted meter. Background Technology

[0002] A DIN rail meter is an energy meter that is installed on an electrical rail. DIN rail meters are mainly used in industrial, commercial, or residential power distribution systems, and are characterized by convenient installation and space saving. DIN rail meters generally have two connection methods: direct connection and indirect connection. When using a direct connection, the DIN rail meter is directly connected to the circuit being measured. When using an indirect connection, the DIN rail meter is connected to the circuit being measured through a current transformer or voltage transformer.

[0003] In existing technologies, when rail meters use a direct connection method, internal circuitry is easily damaged, which leads to low reliability of the rail meters. Utility Model Content

[0004] This application provides a circuit board and a meter to improve the reliability of rail-mounted meters.

[0005] In a first aspect, this application provides a circuit board for use in a rail-mounted electricity meter. The rail-mounted electricity meter includes a base. The circuit board includes a body and a cable management structure. The body is disposed on the base and includes a first surface and a second surface opposite to each other. The first surface faces away from the bottom wall of the base, and the second surface faces the bottom wall of the base. A welding structure is provided on the first surface. The cable management structure is disposed on the body and is located on the side of the welding structure near the edge of the body. The cable management structure can connect the first surface and the second surface and can provide space for voltage lines to pass through, so that one end of the voltage line is connected to the base and the other end is connected to the welding structure.

[0006] Through the above solution, this application incorporates a cable management structure on the main body. This structure allows the first and second surfaces of the main body to connect, enabling the second end of the voltage wire to pass through the main body and weld to the welding structure on the first surface. Compared to existing technologies where the voltage wire is connected to the second surface, this method of connecting the voltage wire through the main body to the first surface straightens the wire, reducing the probability of stacking issues caused by excessive wire length between the second surface and the base. Straightening the voltage wire reduces the likelihood of stacking between the second surface and the base, decreasing the pressure exerted on the insulation layer by electronic components located between the second surface and the base. This reduces the probability of insulation layer damage due to pressure, thereby decreasing the likelihood of short circuits caused by damaged wires and improving the reliability of the rail-mounted meter.

[0007] In one possible design, the thread arrangement structure is a through hole that runs through the body along a first direction, where the first direction is the arrangement direction of the first and second surfaces.

[0008] With the above solution, the through hole penetrates the body along the first direction, which allows the first surface to communicate with the second surface. When the first surface and the second surface are in communication, the second end of the voltage line can pass through the through hole and connect with the welding structure set on the first surface.

[0009] In one possible design, the diameter of the through-hole is larger than the diameter of the voltage line.

[0010] With the above solution, the diameter of the through-hole can be larger than the diameter of the voltage wire. After passing through the through-hole, the voltage wire can move along the first direction within the through-hole. This reduces the difficulty of stretching the voltage wire towards the welding structure after passing through the through-hole, making the welding connection between the second end of the voltage wire and the welding structure easier, thereby reducing the cost of connecting the voltage wire. Furthermore, a through-hole diameter larger than the voltage wire diameter reduces the possibility of friction between the voltage wire's insulation layer and the inner wall of the through-hole, preventing damage to the insulation layer due to friction. This reduces the probability of short circuits caused by damaged insulation, improving the reliability of the rail-mounted meter.

[0011] In one possible design, the wiring structure is a groove created near the edge of the welded structure on the main body.

[0012] With the above scheme, the groove can be set so that the first surface and the second surface are connected. When the first surface and the second surface are connected, the second end of the voltage line can pass through the through hole and connect with the welding structure set on the first surface.

[0013] In one possible design, the groove diameter is larger than the voltage line diameter.

[0014] With the above solution, the voltage wire can move along the first direction within the groove after passing through it. This reduces the difficulty of stretching the voltage wire towards the welding structure after passing through the groove, making welding the second end of the voltage wire easier and thus reducing the cost of connecting the voltage wire. Furthermore, the groove diameter being larger than the voltage wire diameter prevents friction between the voltage wire's insulation layer and the groove wall, avoiding damage to the insulation layer due to friction. This reduces the probability of short circuits caused by damage to the voltage wire's insulation layer, improving the reliability of the rail-mounted meter.

[0015] In one possible design, the groove opening is equipped with a snap-fit ​​structure. The snap-fit ​​structure can limit the voltage line.

[0016] The above solution allows the snap-fit ​​structure to limit the voltage line, thus reducing the probability of the voltage line falling off the body during installation and making the installation more convenient. This reduces the cost of installing the voltage line.

[0017] In one possible design, the snap-fit ​​structure is a slot located at the opening of a groove structure. The diameter of the slot is approximately equal to the diameter of the voltage wire.

[0018] The above solution uses a slot at the opening of a groove structure for the snap-fit ​​mechanism. The diameter of the slot is approximately equal to the diameter of the voltage wire. This reduces the likelihood of the voltage wire slipping out of the slot, thus limiting the voltage wire's position and reducing the probability of it falling off the main body. This makes the installation of the voltage wire more convenient and reduces the cost of installing the voltage wire.

[0019] In one possible design, the rail meter also includes a current transformer, and the welded structure includes a pad with pin holes for engaging the terminals on the current transformer.

[0020] The above solution involves a welding structure with solder pads. Voltage lines are directly connected to these pads, enabling direct connection between the rail-mounted meter and the circuit under test. Pin holes on the solder pads are used to engage the terminals on the current transformer. The current transformer connects to the circuit under test, allowing the circuit to indirectly connect to the solder pads via the current transformer. This design makes the circuit suitable for both direct-rail and indirect-rail meters, improving the versatility of the circuit board and reducing production costs.

[0021] In one possible design, the pads have an extension in a direction away from the wiring structure.

[0022] With the above solution, the solder pads are extended away from the cable management structure, which can increase the welding area of ​​the voltage lines, reduce the probability of problems such as poor soldering or desoldering of the voltage lines, and further improve the reliability of the rail meter.

[0023] Secondly, this application provides a rail-mounted electricity meter, which includes a housing and the circuit board mentioned in the first aspect. The housing includes a top cover and a base, and the top cover and base, when closed, form an installation space. The circuit board is located within the installation space.

[0024] The beneficial effects of the rail meter provided in the second aspect above can be found in the first aspect and the beneficial effects of the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0025] Figure 1 This is a partial structural schematic diagram of the rail meter provided in an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of a circuit board from a first-view perspective, provided as an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of a circuit board from a second perspective, provided as an embodiment of this application.

[0028] Figure 4 for Figure 2 A magnified view of section A.

[0029] Figure 5 This is a first-view structural schematic diagram of a circuit board provided in an embodiment of this application.

[0030] Figure 6 for Figure 5 A magnified view of section B.

[0031] Figure 7 This is a second-view structural schematic diagram of a circuit board provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Main body; 110. First side; 120. Second side;

[0034] 200, Welded structure; 210, Welding pad; 211, Pin hole; 220, Extension section;

[0035] 300. Cable management structure; 310. Through hole; 320. Groove; 321. Snap-fit ​​structure;

[0036] 400. Base. Detailed Implementation

[0037] 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.

[0038] 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 belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0039] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0040] 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.

[0041] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0042] 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, 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used 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.

[0043] 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.

[0044] In the description of this application, it should be noted that, unless otherwise expressly 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. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; 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.

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0046] Figure 1 This is a partial structural schematic diagram of the rail meter provided in an embodiment of this application. Figure 2 This is a schematic diagram of a circuit board from a first-view perspective, provided as an embodiment of this application. Figure 3 This is a schematic diagram of a circuit board from a second perspective, provided as an embodiment of this application. Figures 1 to 3 As shown, this application provides a rail-mounted electricity meter, which includes a housing and a circuit board. The housing includes a top cover and a base 400, which together form an installation space, and the circuit board is located within the installation space.

[0047] Rail-mounted meters are one of the fundamental devices for data acquisition in smart grids. They are responsible for collecting, measuring, and transmitting raw electrical energy data, forming the basis for information integration, analysis, optimization, and presentation. Rail-mounted meters can be connected to the circuit under test in two ways: direct connection and indirect connection. When a direct connection is used, the meter can be directly connected to the circuit. When an indirect connection is used, the meter is connected to the circuit through a current transformer or voltage transformer.

[0048] Based on existing technology: When a rail-mounted meter uses a direct connection method, the second side of the circuit board is connected to the base via voltage lines. However, voltage lines are typically long and may overlap between the second side and the base. Since voltage lines are usually composed of conductors wrapped in an insulating layer, and electronic components are located between the second side of the circuit board and the base, these components may compress the insulation layer of the voltage lines, causing damage. When the insulation layer of the voltage lines is damaged, short circuits may occur, leading to the burnout of the rail-mounted meter.

[0049] As the core electronic component of the rail meter, the circuit board has functions such as data acquisition and processing, communication, safety protection, improving the accuracy of the rail meter, and providing intelligent function support for the rail meter.

[0050] When the rail meter is connected indirectly, the current transformer or voltage transformer can be installed on the first side 110 of the circuit board.

[0051] The DIN rail meter mentioned in this application can reduce the probability of the above problems occurring by changing the connection position of the voltage line and the circuit board.

[0052] The circuit board mentioned in this application will be clearly and completely described below with reference to the accompanying drawings.

[0053] Figure 4 for Figure 2 An enlarged view of section A. (See image.) Figures 1 to 4 As shown, this application provides a circuit board for use in a rail meter. The rail meter includes a base 400. The circuit board includes a body 100, a cable management structure 300, and voltage lines. The body 100 is disposed on the base 400 and includes a first surface 110 and a second surface 120 positioned opposite each other. The first surface 110 faces away from the bottom wall of the base 400, and the second surface 120 faces the bottom wall of the base 400. A welding structure 200 is provided on the first surface 110. The cable management structure 300 is disposed on the body 100 and is located on the side of the welding structure 200 near the edge of the body 100. The cable management structure 300 can connect the first surface 110 and the second surface 120 and can provide space for the voltage lines to pass through, so that one end of the voltage line is connected to the base 400 and the other end is connected to the welding structure 200.

[0054] The rail-mounted meter includes a base 400 and a top cover. The base 400 has a first receiving cavity, and the top cover has a second receiving cavity. When the top cover and base 400 are closed, the first receiving cavity in the base 400 and the second receiving cavity in the top cover form the installation space for the rail-mounted meter. The rail-mounted meter is installed in this space. The base 400 and top cover protect the internal structural components of the rail-mounted meter from external damage and provide a relatively sealed and safe installation environment for the electronic components. A support column is provided within the first receiving cavity of the base 400, and the body 100 is mounted on the support column. This allows sufficient clearance between the body 100 and the base 400 for installing the remaining electronic components of the rail-mounted meter. Furthermore, the support column reduces the deformation of the base 400 relative to the body 100, further improving the structural strength of the rail-mounted meter. The main body 100 includes a first surface 110 and a second surface 120 that are positioned opposite each other. When the main body 100 is mounted on a support column, the first surface 110 faces the top cover direction and the second surface 120 faces the base 400 direction.

[0055] When the main body 100 is installed in the mounting space of the rail meter, a portion of the main body 100 abuts against the inner side wall of the top cover, and another portion of the main body 100 abuts against the inner side wall of the base 400. This allows the main body 100 to separate the first receiving cavity in the base 400 from the second receiving cavity in the top cover. The cable management structure 300 can be a guide structure provided on the main body 100 for guiding the voltage line. For example, the cable management structure 300 can be a hole-shaped structure, a groove-shaped structure, etc. The cable management structure 300 allows the second end of the voltage line to pass through the main body 100 and be welded to the welding structure 200 provided on the first surface 110.

[0056] In summary, this application provides a cable management structure 300 on the body 100. The cable management structure 300 allows the first surface 110 and the second surface 120 of the body 100 to be connected, so that the second end of the voltage line can pass through the body 100 and be welded to the welding structure 200 provided on the first surface 110.

[0057] Compared to the existing technology where the voltage line is connected to the second surface, the voltage line passes through the body 100 and is connected to the first surface 110, which can extend the path of the voltage line on the body 100, straighten the voltage line of fixed length, and reduce the probability of the voltage line stacking between the second surface 120 and the base 400 due to excessive length.

[0058] Furthermore, when the voltage line is straightened, the possibility of the voltage line stacking between the second surface 120 and the base 400 is smaller. This can reduce the compressive strength of the electronic components set between the second surface 120 and the base 400 of the circuit board on the insulation layer of the voltage line, thereby reducing the probability of the insulation layer of the voltage line being damaged due to compression. In turn, it can reduce the probability of short circuit due to damage to the voltage line and improve the reliability of the rail meter.

[0059] Specifically, the cable management structure 300 can be configured in several ways. Two of these configurations will be described in detail below with reference to the attached diagram.

[0060] Figures 1 to 4 The structure shown is the first configuration of the circuit board. Please refer to it. Figures 1 to 4 The wiring structure 300 is a groove 320 opened at the edge of the body 100 near the welding structure 200.

[0061] The groove 320 can be a through groove structure opened along the first direction. The groove 320 can be connected to the edge of the body 100, that is, the groove opening of the groove 320 is set away from the welding structure 200. The groove 320 can be set on the body 100 by grooving or carving after the body 100 is formed. The groove 320 can be a circular groove, a rectangular groove, or a triangular groove, etc., and this application does not make specific limitations in this regard.

[0062] Since the voltage line has a limited length and the first end of the voltage line is fixedly connected to the base 400, and the second end of the voltage line is connected to the welding structure 200, the welding structure 200 can be set near the edge of the body 100. In this way, the second end of the voltage line can easily be connected to the welding structure 200 after passing through the groove 320.

[0063] When the first setting is selected, the groove 320 can make the first surface 110 and the second surface 120 communicate. When the first surface 110 and the second surface 120 communicate, the second end of the voltage line can pass through the through hole 310 and connect with the welding structure 200 set on the first surface 110.

[0064] Figure 5 This is a first-view structural schematic diagram of a circuit board provided in an embodiment of this application. Figure 6 for Figure 5 A magnified view of section B. Figure 7 This is a second-view structural schematic diagram of a circuit board provided in an embodiment of this application. Figure 5 and Figure 7 The structure shown represents the second configuration of the circuit board. The second configuration is as follows: Figure 1 as well as Figures 5 to 7 As shown, the thread arrangement structure 300 is a through hole 310 that penetrates the body 100 along a first direction, which is the arrangement direction of the first surface 110 and the second surface 120.

[0065] The first direction is the arrangement direction of the first surface 110 and the second surface 120, which can also be the thickness direction of the body 100. The through hole 310 can penetrate the body 100 along the thickness direction so that the first surface 110 and the second surface 120 can be connected. The through hole 310 can be set on the body 100 after the body 100 is formed by means of grooving or engraving. The through hole 310 can be a circular hole or a rectangular hole, or it can be an irregularly shaped hole structure. This application does not specifically limit this.

[0066] Since the voltage line has a limited length and the first end of the voltage line is fixedly connected to the base 400, while the second end of the voltage line is connected to the welding structure 200, the through hole 310 can be set close to the welding structure 200. In this way, the second end of the voltage line can easily be connected to the welding structure 200 after passing through the through hole 310.

[0067] When the second configuration is selected, the through hole 310 penetrates the body 100 along the first direction, allowing the first surface 110 to communicate with the second surface 120. When the first surface 110 and the second surface 120 are in communication, the second end of the voltage line can pass through the through hole 310 and connect with the welding structure 200 provided on the first surface 110.

[0068] After the second end of the voltage line passes through the through hole 310, it needs to be stretched to allow it to connect with the welding structure 200. To facilitate these steps, this application further defines the through hole 310; please refer to [reference needed]. Figures 5 to 7 As shown, the diameter of the through hole 310 can be larger than the diameter of the voltage line.

[0069] For example, the difference between the diameter of the through hole 310 and the diameter of the voltage line can be 1 mm, 2 mm, 3 mm, etc., as long as the voltage line can move freely within the through hole 310. When the through hole 310 is a hole structure other than a circle, the diameter of the through hole 310 refers to the minimum distance between two oppositely disposed hole walls.

[0070] By setting the diameter of the through hole 310 to be larger than the diameter of the voltage line, the voltage line can move in the first direction within the through hole 310 after passing through it. This reduces the difficulty of stretching the voltage line to the welding structure 200 after passing through the through hole 310, making the welding connection between the second end of the voltage line and the welding structure 200 more convenient, thereby reducing the cost of connecting the voltage line.

[0071] Furthermore, the fact that the diameter of the through hole 310 is larger than the diameter of the voltage line can reduce the possibility of friction between the insulation layer of the voltage line and the inner wall of the through hole 310, thereby reducing the probability of the insulation layer of the voltage line being damaged due to friction, and thus reducing the probability of short circuits caused by damage to the voltage line, improving the reliability of the rail meter.

[0072] To facilitate the connection of the voltage line to the welding structure 200 after passing through the groove 320, this application further defines the groove 320. Please refer to [reference needed]. Figures 1 to 4 As shown, the groove diameter of groove 320 is larger than the diameter of the voltage line. The groove diameter refers to the dimension between the two sidewalls of the groove.

[0073] For example, the groove diameter of the groove 320 can be 1.2 times, 1.5 times, or the diameter of the voltage line, as long as the voltage line can move freely within the groove 320.

[0074] With the above configuration, the voltage wire can move along the first direction within the groove 320 after passing through it. This reduces the difficulty of stretching the voltage wire towards the welding structure 200 after passing through the groove 320, making welding the second end of the voltage wire easier and thus reducing the cost of connecting the voltage wire. Furthermore, the groove diameter of the groove 320 being larger than the diameter of the voltage wire prevents friction between the insulation layer of the voltage wire and the groove wall of the groove 320, avoiding damage to the insulation layer due to friction. This reduces the probability of the insulation layer being damaged by friction, thereby reducing the probability of short circuits caused by damage and improving the reliability of the rail-mounted meter.

[0075] Because the groove 320 is located at the edge of the body 100, and the groove diameter of the groove 320 is larger than the diameter of the voltage wire, when the voltage wire passes through the groove 320 and the body 100 is not yet placed on the support column on the base 400, the voltage wire is prone to slipping off the groove opening. To reduce the probability of this problem occurring, such as... Figure 1 as well as Figure 4 As shown, this application also provides a snap-fit ​​structure 321 at the opening of the groove 320. The snap-fit ​​structure 321 can limit the voltage line.

[0076] The snap-fit ​​structure 321 can be a protruding structure on the groove wall of the groove 320, or it can be a groove-shaped structure that connects the groove 320. The snap-fit ​​structure 321 is located at the edge of the body 100. When the voltage line passes through the groove 320, the snap-fit ​​structure 321 can limit the voltage line so that it does not fall out of the groove opening of the groove 320.

[0077] With the above settings, the snap-fit ​​structure 321 can limit the voltage line, thereby reducing the probability of the voltage line falling off the body 100 during the installation process, making the installation of the voltage line more convenient and reducing the cost of the voltage line installation process.

[0078] like Figure 2 as well as Figure 4 As shown, the snap-fit ​​structure 321 is a slot provided at the opening of the groove 320 structure. The diameter of the slot is approximately equal to the diameter of the voltage line.

[0079] The slot is located at the opening of the groove 320 structure, allowing the groove 320 structure to communicate with the slot. The diameter of the slot is approximately equal to the diameter of the voltage wire, which reduces the possibility of the voltage wire slipping out of the slot, thus limiting the voltage wire and reducing the probability of the voltage wire falling off the body 100. This makes the installation of the voltage wire more convenient and reduces the cost of the voltage wire installation process.

[0080] Furthermore, the groove 320 structure and the card slot are connected and merged into a single irregular groove. Since the groove diameter of the groove 320 structure is larger than the diameter of the voltage line, and the diameter of the card slot is approximately equal to the diameter of the voltage line, this can be understood as the difference between the diameter of the card slot and the diameter of the voltage line being less than or equal to 2 millimeters.

[0081] Therefore, the aforementioned irregular groove can be a groove that is larger in the front and smaller in the back.

[0082] Along the direction from the slot to the groove 320, the size of the groove 320 is larger than the diameter of the voltage line so that the voltage line can move freely within the groove 320.

[0083] The aforementioned irregular groove can be directly opened at the edge of the body 100, or a through groove can be opened first with the groove diameter of the card slot, and then the diameter of the through groove near the welding structure 200 can be expanded until the groove diameter of the through groove near the welding structure 200 is greater than the diameter of the voltage line.

[0084] With the above solution, the snap-fit ​​structure 321 is a slot set at the groove of the groove 320 structure, and the groove diameter is basically equal to the diameter of the voltage wire. This can reduce the possibility of the voltage wire slipping out of the slot, thereby limiting the voltage wire and reducing the probability of the voltage wire falling off the body 100. This makes the installation of the voltage wire more convenient and reduces the cost of the voltage wire during the installation process.

[0085] In one possible design, such as Figure 4 as well as Figure 6 As shown, the welding structure 200 includes a welding pad 210, and the welding pad 210 is provided with a pin hole 211, which is used to snap the wiring terminals on the current transformer.

[0086] Pad 210 can be used for soldering voltage lines.

[0087] The current transformer is used in an indirect rail meter. The current transformer is equipped with terminals, which can be pin-type structures used to snap into the pin holes 211 on the pad 210, so that the body 100 can be used to connect the current transformer.

[0088] The transformer can be a current transformer or a voltage transformer; this application example does not specifically limit this.

[0089] Therefore, pad 210 can be used to solder voltage lines in direct-rail meters. The pin hole 211 on pad 210 can be used to connect the current transformer in indirect-rail meters. It should be noted that the pin hole 211 on pad 210 does not affect the soldering of voltage lines.

[0090] Through the above scheme, the welding structure 200 includes a solder pad 210, to which the voltage line is directly connected, enabling direct connection between the rail meter and the circuit under test. The pin holes 211 on the solder pad 210 are used to engage the terminals on the current transformer, connecting the current transformer to the circuit under test. This allows the circuit under test to be indirectly connected to the solder pad via the current transformer, thus enabling the main body 100 to be used with both direct-type and indirect-type rail meters, improving the versatility of the circuit board and reducing production costs.

[0091] Furthermore, current transformers typically have two terminals. In this application, the pad 210 can have only one pin hole 211, allowing the current transformer to have only one terminal, thereby increasing the withstand voltage distance.

[0092] In addition, only one pin hole 211 is provided on the pad 210, which reduces the number of openings, shortens the manufacturing time of the pad 210, and further reduces the production cost of the circuit board.

[0093] As can be seen from the above, pad 210 is used for soldering voltage lines.

[0094] In related technologies, the ends of the voltage lines are soldered to the circuit board, making the soldering area only the size of the voltage line's cross-section. This can easily cause the solder joints to loosen, leading to problems such as incomplete soldering or detachment, which in turn affects the normal use of the rail meter.

[0095] Based on this, please continue to refer to Figure 4 as well as Figure 6 As shown, in one possible design, the pad 210 has an extension 220 in a direction away from the wiring structure 300.

[0096] In this process, a portion of the voltage line near the second end is attached to the extension section 220, and the aforementioned portion is welded to the extension section 220. This increases the welding area of ​​the voltage line and reduces the probability of problems such as poor soldering or detachment of the voltage line, thereby ensuring that the rail meter can be used normally.

[0097] With the above solution, the solder pad 210 is provided with an extension section 220 in the direction away from the cable management structure 300, which can increase the welding area of ​​the voltage line, reduce the probability of problems such as poor soldering and desoldering of the voltage line, and further improve the reliability of the rail meter.

Claims

1. A circuit board for use in a rail-mounted electricity meter, the rail-mounted electricity meter comprising a base, characterized in that, The circuit board includes: The body is disposed on the base. The body includes a first surface and a second surface that are positioned opposite each other. The first surface faces away from the bottom wall of the base, and the second surface faces the bottom wall of the base. A welding structure is provided on the first surface. A wire management structure is provided on the body. The wire management structure is located on the side of the welding structure near the edge of the body. The wire management structure can connect the first surface and the second surface. The wire management structure can provide space for the voltage wire to pass through, so that one end of the voltage wire is connected to the base and the other end is connected to the welding structure.

2. The circuit board according to claim 1, characterized in that, The thread arrangement structure is a through hole that penetrates the body along a first direction, where the first direction is the arrangement direction of the first surface and the second surface.

3. The circuit board according to claim 2, characterized in that, The diameter of the through hole is larger than the diameter of the voltage line.

4. The circuit board according to claim 1, characterized in that, The thread-retaining structure is a groove opened at the edge of the body near the welding structure.

5. The circuit board according to claim 4, characterized in that, The groove diameter is larger than the voltage line diameter.

6. The circuit board according to claim 5, characterized in that, The groove opening is provided with a snap-fit ​​structure; The snap-fit ​​structure can limit the voltage line.

7. The circuit board according to claim 6, characterized in that, The snap-fit ​​structure is a slot provided at the opening of the groove structure; The diameter of the slot is approximately equal to the diameter of the voltage line.

8. The circuit board according to claim 1, characterized in that, The rail meter also includes a current transformer, and the welding structure includes a welding pad with a pin hole for engaging the terminals on the current transformer.

9. The circuit board according to claim 8, characterized in that, The pads have an extension section in a direction away from the wiring structure.

10. A rail-mounted electric meter, characterized in that, Includes a housing and a circuit board as described in any one of claims 1 to 9; The housing includes a top cover and a base, and the top cover and the base are closed to form an installation space; The circuit board is located within the mounting space.

Images