Track meter

Abstract

The application relates to a guide rail type electric meter and relates to the technical field of electric energy meters. The guide rail type electric meter comprises a base module, a cover module and a PCB module. One of the cover module and the PCB module is provided with a first guide corrector, and the other is provided with a first docking piece. The first guide corrector and the first docking piece are configured to cooperate with each other during assembly, so as to guide and connect the cover module and the PCB module. One of the cover module and the base module is provided with a second guide corrector, and the other is provided with a second docking piece. The second guide corrector and the second docking piece are configured to cooperate with each other during assembly, so as to guide and connect the cover module and the base module. The guide rail type electric meter has two-stage guide corrector structures, clear assembly paths, reduced attitude deviation between modules, improved assembly efficiency and whole machine consistency, and is suitable for automatic batch assembly scenes.

Description

Technical Field

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

[0002] A DIN rail meter is an energy metering device installed on a standard DIN rail. Due to its small size and easy installation, it is widely used in distribution cabinets or electrical control boxes, and is often used for branch metering of single-phase or three-phase electricity. It has accurate metering, remote meter reading, and multiple communication functions. However, the applicant has found in its long-term research and development and production practice that the assembly process of existing DIN rail meters is complex and inefficient. Utility Model Content

[0003] This application provides a rail-mounted electricity meter that can improve the assembly efficiency of rail-mounted electricity meters, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, this application provides a rail-mounted electricity meter, including a base module, a cover module, and a PCB module. One of the cover module and the PCB module is provided with a first guide member, and the other is provided with a first mating member. The first guide member and the first mating member are configured to cooperate with each other during assembly to guide and connect the cover module and the PCB module.

[0005] One of the cover module and the base module is provided with a second guide member, and the other is provided with a second docking member. The second guide member and the second docking member are configured to cooperate with each other during the assembly process to guide and connect the cover module and the base module.

[0006] Optionally, the cover module has a mating hole, and the first mating member is configured to engage with the mating hole under the action of the first guide member.

[0007] Optionally, the first guide member includes a guide rib and a guide portion. The guide rib is disposed inside the cover module on one side of the docking hole, and the guide portion is disposed on the guide rib. The guide portion is configured to guide the first docking member to face the docking hole.

[0008] Optionally, the guide portion has a first inclined guide surface and a guide surface, the guide surface being on the same plane as the inner wall of the docking hole, the first inclined guide surface being connected to the end of the guide surface away from the docking hole, and the first inclined guide surface being configured to slide in cooperation with the first docking member to guide the first docking member from the first inclined guide surface to the guide surface.

[0009] Optionally, the first guide member is provided with a plurality of members on the outer periphery of the mating hole;

[0010] The first docking component includes pins, and multiple pins are arranged side by side.

[0011] Optionally, the outer wall of the cover module is provided with a protective part, the protective part is arranged around the outer periphery of the docking hole, and the pin is located inside the protective part and forms a female adapter with the protective part;

[0012] The PCB module has a socket at one end away from the pin, and the socket is configured to be plugged into and cooperate with the pin on another adjacent rail-mounted meter.

[0013] The cover module has an insertion interface on its outer wall away from the protective part. The insertion interface and the socket cooperate to form a male connector. The male connector is configured to be inserted into the female connector on another adjacent rail-mounted meter.

[0014] Optionally, the cover module is provided with a guide groove, and the PCB module is provided with a guide plate, the guide plate being configured to insert into the guide groove;

[0015] The insertion end of the guide groove has a second inclined guide surface that communicates with the inner wall of the guide groove. The second inclined guide surface is configured to slide in cooperation with the guide plate to guide the guide plate into the guide groove.

[0016] Optionally, the second guide member is disposed on the cover module, and the second docking member is disposed on the base module;

[0017] The second guide member includes a plug post with an axially penetrating plug groove, and the second mating member includes a plug rod configured to engage with the plug groove.

[0018] Optionally, the insertion end of the plug slot is provided with a third inclined guide surface on its outer periphery. The third inclined guide surface is configured to slide and abut against the plug rod to guide the plug rod into the plug slot.

[0019] Optionally, the base module is further provided with an abutment portion, which is configured to abut against the PCB module to press the PCB module tightly against the cover module.

[0020] Optionally, the PCB module has a positioning groove configured to engage with the plug post for limiting.

[0021] Optionally, the inner wall of the cover module is provided with a buckle, and the outer wall of the base module is provided with a slot. The buckle is configured to engage with the slot to confine the base module within the cover module.

[0022] Optionally, the PCB module includes a PCB motherboard and a terminal block, the terminal block being connected to the PCB motherboard, the cover module having a terminal receiving slot, and the terminal block being configured to plug into the terminal receiving slot.

[0023] Optionally, a first cover plate is hinged to the cover module at the opening of the wiring receiving groove, and the first cover plate is used to cover the wiring end;

[0024] The first cover plate is made of antistatic material.

[0025] Optionally, the PCB module further includes a wiring frame assembly and a relay, the relay having a connecting strip, the wiring frame assembly having a connecting hole, and the connecting strip being configured to plug into the connecting hole.

[0026] Optionally, the cover module has a placement slot, and the wiring frame assembly can be embedded in the placement slot.

[0027] Optionally, a second cover plate is hinged to the cover module at the terminal of the wiring frame assembly, and the second cover plate is used to cover the wiring frame assembly.

[0028] Optionally, the cover module has a sliding groove configured to slide in conjunction with a guide rail;

[0029] The cover module is provided with a clamping member, which is used to clamp the cover module against the guide rail.

[0030] Optionally, the clamping member includes a first spring and a retaining plate. The inner wall of the sliding groove is provided with a mounting sub-groove. The first spring is located in the mounting sub-groove. The retaining plate abuts against the first spring. The first spring is configured to drive the retaining plate to move toward the guide rail side, so as to drive the retaining plate to abut against the side wall of the guide rail.

[0031] Optionally, the PCB module has a touch area, and the cover module is provided with an insulating touch element, which is configured to abut against the touch area.

[0032] Optionally, the insulating touch component includes a touch spring and an insulating sleeve, wherein the touch spring abuts against the touch area, and the insulating sleeve is sleeved on the touch spring.

[0033] Optionally, the cover module is provided with a light guide post, which is electrically connected to the touch area, and the light guide post is connected to the cover module by in-mold injection molding.

[0034] Optionally, it also includes a connector, wherein the second mating member has an axially extending connecting hole, and the connector is configured to extend axially from one end of the connecting hole to the other end of the connecting hole to connect the cover module to the base module.

[0035] Optionally, the cover module is provided with a recessed groove, which is axially connected to the connecting through hole, and a lead seal cap is embedded in the recessed groove.

[0036] In the guide rail type meter of this application embodiment, a double-layer guiding structure is realized by setting a first guiding component and a first mating component between the cover module and the PCB module, and setting a second guiding component and a second mating component between the cover module and the base module. This structure has a clear guiding path during the assembly process, which helps to guide each module to automatically converge to the predetermined position in the assembly direction, reduce the degree of human intervention, reduce the assembly posture deviation between components, and thus make the overall assembly process simpler and more efficient.

[0037] Meanwhile, this structural design can limit the degrees of freedom of components in multiple directions, improving the stability of structural connections and the consistency of the whole machine to a certain extent. This, in turn, helps to improve the batch assembly yield, shorten the production cycle, and reduce the probability of rework caused by the propagation of assembly errors. In addition, the dual-guide structure can standardize the assembly sequence and linearize the process path, exhibiting good versatility and manufacturing adaptability.

[0038] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0041] Figure 1 This is a structural illustration of an embodiment of this application. Figure 1 ;

[0042] Figure 2 This is a structural illustration of an embodiment of this application. Figure 2 ;

[0043] Figure 3 This is an exploded view of an embodiment of this application;

[0044] Figure 4 This is an exploded view of the connection relationship between the cover module and the PCB module in an embodiment of this application;

[0045] Figure 5 yes Figure 4 Enlarged view of part A in the image;

[0046] Figure 6 yes Figure 4 Enlarged view of part B in the image;

[0047] Figure 7 This is an exploded view of the connection relationship between the cover module and the base module in an embodiment of this application;

[0048] Figure 8 yes Figure 7 Enlarged view of section C in the image;

[0049] Figure 9 This is a schematic diagram illustrating the structure of the PCB module in an embodiment of this application;

[0050] Figure 10 This is a cross-sectional view used in the embodiments of this application to show the internal structure of the cover module;

[0051] Figure 11 This is a schematic diagram illustrating the structure of a rail-mounted electricity meter installed on a rail in an embodiment of this application;

[0052] Figure 12 This is an exploded view of the connection between the lead seal cap and the cover module in an embodiment of this application;

[0053] Figure 13 This is an exploded view of the connection relationship between the connector and the cover module in an embodiment of this application.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Base module; 11. Second mating part; 111. Insert rod; 112. Connecting hole; 12. Abutment part; 13. Slot;

[0056] 2. Cover module; 21. First guide component; 211. Guide rib; 212. Guide section; 2121. First inclined guide surface; 2122. Guide surface; 22. Second guide component; 221. Insertion post; 2211. Insertion groove; 2212. Third inclined guide surface; 23. Connecting hole; 24. Protective part; 25. Insertion interface; 26. Guide groove; 261. Second inclined guide surface; 27. Buckle; 28. Wiring receiving groove; 281. First cover plate; 29. ​​Placement groove; 291. Second cover plate; 201. Sliding groove; 2010. Mounting sub-groove; 202. Light guide post;

[0057] 3. PCB module; 31. First mating part; 311. Pin; 32. Socket; 33. Guide plate; 34. Positioning groove; 35. PCB main board; 36. Wiring terminal; 37. Wiring frame assembly; 371. Connecting hole; 38. Relay; 381. Connecting strip; 39. Touch area;

[0058] 5. Clamping component; 51. First spring; 52. Clamping plate;

[0059] 6. Insulating touch component; 61. Touch spring; 62. Insulating sleeve;

[0060] 7. Connectors;

[0061] 8. Lead seal cap;

[0062] 9. Settling tank. Detailed Implementation

[0063] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0064] This application provides a rail-mounted electricity meter; please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 The meter includes a base module 1, a cover module 2, and a PCB module 3. One of the cover module 2 and the PCB module 3 is provided with a first guide member 21, and the other is provided with a first mating member 31. The first guide member 21 and the first mating member 31 cooperate with each other during the assembly process to guide and connect the cover module 2 and the PCB module 3.

[0065] Furthermore, one of the cover module 2 and the base module 1 is provided with a second guide component 22, and the other is provided with a second mating component 11. The second guide component 22 and the second mating component 11 cooperate with each other during the assembly process to guide and connect the cover module 2 and the base module 1. Through the aforementioned two-stage guiding cooperation, the base module 1, cover module 2 and PCB module 3 have a clear path in terms of assembly sequence. Assemblers can complete the assembly of the rail-mounted meter by first assembling the cover module 2 with the PCB module 3, and then assembling the cover module 2 with the base module 1. The number of assembly actions is reduced to a certain extent, the assembly time is shortened, the probability of rework is reduced, and the overall consistency of the rail-mounted meter is improved.

[0066] It is understood that the first guide member 21 can be a columnar boss, a wedge-shaped guide post, a conical positioning post, or a tongue structure with a guiding bevel. The first mating member 31 can be a matching insertion hole, a V-shaped guide groove, a flared notch, or a window with a partially guided bevel. The end of the first guide member 21 is provided with rounded corners or chamfers, and the inlet size is appropriately widened and gradually tightened, so that an automatic positioning tendency is generated in the early stage of assembly. The offset in the X and Y planes is gradually eliminated after contact with the bevel. The Z-direction gap is limited by the length of the guide post or the limiting shoulder, which provides structural constraints on the final relative position. This guiding path has a positive effect on assembly efficiency.

[0067] The second guide member 22 and the second mating member 11 can be a combination of a snap-fit ​​27 type positioning post and a snap-fit ​​27 hole, a dovetail sliding structure and a dovetail groove, or a guide rib and a rib groove. Among them, the snap-fit ​​27 type structure generates a reliable holding force after the fit is completed through elastic deformation; the dovetail structure gradually presses in during the sliding process through the inclined surface fit; and the guide rib structure limits the lateral gap through the two side walls and forms an axial limit at the final end face. These methods all belong to the structural type that completes the alignment and connection in parallel. The fit tolerance between the first guide member 21 and the first mating member 31, and between the second guide member 22 and the second mating member 11, can be comprehensively set based on the shrinkage rate of the component materials, the fluctuation of the injection molding dimensions, and the form and position deviation after the DIN rail is installed.

[0068] It is worth noting that in this embodiment, "first guide component 21" and "second guide component 22" refer to active structural elements that guide, correct relative positions, and restrict degrees of freedom during assembly. These can be protruding, extended, or positioning components with specific geometric slopes. "First docking component 31" and "second docking component 11" refer to passive structural elements that cooperate with the first guide component 21 and the second guide component 22 to complete guidance, positioning, and connection. These are typically represented by holes, slots, windows, or locally recessed areas. "Guidance" refers to the technical action of gradually bringing two modules closer together during relative movement to achieve a preset spatial positional relationship through geometric design. It is not limited to a completely gapless state; as long as the requirements for power metering and assembly strength are met within a certain range of residual tolerances, the guidance purpose is considered achieved. By defining these terms, ambiguity is avoided, and it is convenient for manufacturing and inspection processes to be carried out according to the same standards.

[0069] Based on this, the assembly process of the DIN rail type meter can be carried out as follows: First, the PCB module 3 is moved towards the cover module 2 in a predetermined direction. The first guide member 21 contacts the first docking member 31 and enters along the guide surface. The freedom of the PCB module 3 in the X and Y directions is gradually restricted. After approaching the contact position of the limiting shoulder in the axial direction, a stable connection is formed. Then, the component that has completed the initial guidance is assembled with the base module 1. The second guide member 22 enters the second docking member 11. The translation and angular deviation of the cover module 2 relative to the base module 1 are gradually reduced in the guiding stage, forming a complete machine with DIN rail mounting capability. Since the first guide member 21 and the second guide member 22 exist simultaneously at two key assembly interfaces, the assembly personnel do not need to repeatedly search for hole positions or adjust postures in each step of the operation. The assembly consistency is improved to a certain extent, and the batch production cycle is more stable.

[0070] In terms of materials and manufacturing, the first guide member 21 and the second guide member 22 can be integrally injection molded with the cover module 2 or the base module 1, or they can be fixed to the corresponding modules by ultrasonic welding, hot riveting, or metal insert injection molding. The first mating member 31 and the second mating member 11 can be directly formed in the injection mold, or they can be obtained by post-processing methods such as CNC milling and punching. For scenarios that require both high-temperature aging and electrical insulation performance, engineering plastics with a flame retardant rating of UL94 V-0 can be selected as the base material for the cover module 2 and the base module 1. The mating dimensions of the guide members and the mating members are modified according to the coefficient of thermal expansion of the materials, resulting in better dimensional stability after assembly.

[0071] In summary, the guiding cooperation between the first guide component 21 and the first mating component 31 allows the cover module 2 and the PCB module 3 to converge towards the preset position during the initial contact stage, reducing manual calibration. The guiding cooperation between the second guide component 22 and the second mating component 11 provides clear guidance for the cover module 2 and the base module 1 along the assembly path, reducing the possibility of accumulated assembly errors. This dual-guiding scheme makes the overall assembly process more linear and repeatable, improving assembly efficiency, reducing rework, and lowering process complexity. The rail-mounted meter exhibits higher stability and yield under mass production conditions. All of these effects benefit to some extent from the collaborative design of the geometry of the guide components and mating components, the angle of the guiding slope, tolerance matching strategies, and the assembly sequence, and do not depend on the absolute performance of any single feature.

[0072] In some embodiments, combined with Figure 3 , Figure 4 The first guide member 21 is disposed on the cover module 2, and the first docking member 31 is disposed on the PCB module 3. The cover module 2 has a docking hole 23. Under the action of the first guide member 21, the first docking member 31 is inserted and cooperated with the docking hole 23 to complete the alignment and connection.

[0073] For example, refer to Figure 4 and Figure 5 The first guide member 21 includes a guide rib 211 and a guide portion 212. The guide rib 211 is disposed inside the cover module 2 and located on one side of the mating hole 23. The guide portion 212 is disposed on the guide rib 211 and is used to guide the first mating member 31 to be aligned with the mating hole 23. Further, the guide portion 212 has a first inclined guide surface 2121 and a guide surface 2122. The guide surface 2122 is located on the same plane as the inner wall of the mating hole 23. The first inclined guide surface 2121 and the guide surface 2122 are connected to the end away from the mating hole 23 and form an inclined transition. The first inclined guide surface 2121 is slidably engaged with the first mating member 31, so that when the assembly posture deviation occurs, the first mating member 31 gradually moves towards the guide surface 2122 along the inclined surface under the action of the guide force component. Further, the first guide member 21 has multiple guides on the outer periphery of the mating hole 23.

[0074] It is understandable that when the first mating part 31 is attached to the guide surface 2122, the direction of the insertion force is basically consistent with the normal of the guide surface 2122. The insertion force path mainly retains the axial degree of freedom. The lateral offset and angular deviation are significantly compressed before entering the mating hole 23. From the perspective of structure and effect, the first inclined guide surface 2121 undertakes the primary positioning and error reduction functions, while the guide surface 2122 undertakes the end translation and limiting functions.

[0075] It is worth noting that, to avoid ambiguity in the understanding of terms, in this embodiment, "guiding" refers to the process of guiding the relative positions of the two modules to converge to a predetermined tolerance range through geometric shape, without requiring a completely gapless fit; "plug-in mating" refers to the first mating member 31 establishing a positioning and connection relationship with the mating hole 23 by insertion; "guide rib 211" refers to a rib-like protruding structure used to restrict the degrees of freedom of translation and rotation; "guide portion 212" refers to the functional area containing the first inclined guide surface 2121 and the guide surface 2122; "first inclined guide surface 2121" refers to an inclined surface set at a certain angle relative to the assembly axis and used for initial sliding positioning; "guide surface 2122" refers to a planar area coplanar with the inner sidewall of the mating hole 23, used to provide translational limitation for the first mating member 31 in the early stage of insertion.

[0076] Based on this, by clarifying the positions of the first guide member 21 and the first docking member 31, disclosing the docking hole 23, and providing a detailed description of the guide rib 211 and the guide part 212, the rail-mounted meter has a clearer geometric constraint path in the assembly process of the cover module 2 and the PCB module 3. The dimensional chain analysis and mold tolerance setting are more intuitive. The assembly consistency in mass production is improved to a certain extent, the number of rework steps is reduced, the overall process complexity is reduced, and it has higher operability.

[0077] In some examples, such as Figure 4 , Figure 5 As shown, the first mating part 31 includes a plurality of pins 311 arranged side by side. The plurality of pins 311 are arranged in a direction parallel or substantially parallel to the extension direction of the DIN rail, and the spacing is set according to the signal voltage level, insulation creepage distance and machining tolerance.

[0078] For example, combined Figure 2 , Figure 4 The outer wall of the cover module 2 is provided with a protective part 24. The protective part 24 surrounds the outer periphery of the docking hole 23 in a ring or near-ring shape. The pin 311 is located inside the protective part 24 and together with the protective part 24 forms a female adapter interface. The protective part 24 can be made of a material with anti-static properties. At the same time, by increasing the wall thickness or setting ribs, mechanical protection is provided for the pin 311 to reduce the risk of bending caused by external forces during handling and assembly.

[0079] For example, combined Figure 1 , Figure 4 A socket 32 ​​is provided on the end of the PCB module 3 away from the pin 311. The socket 32 ​​is used to connect and cooperate with the pin 311 on another adjacent rail meter. An interface 25 is provided on the outer wall of the cover module 2 away from the protective part 24. The interface 25 and the socket 32 ​​cooperate to form a male connector. The male connector connects and cooperates with the female connector on another adjacent rail meter.

[0080] Based on this, a modular splicing link without additional wires is established between multiple meters arranged along the guide rail. After the assembly personnel are installed in the cabinet, they only need to push the adjacent meters to align the interfaces on both sides and complete the plugging to form a continuous bus. The number of on-site wiring steps is reduced to a certain extent, the probability of wiring errors is reduced, and the maintenance and disassembly time is shortened.

[0081] To avoid misunderstandings regarding terminology, in this embodiment, "pin 311" refers to the conductive protrusion of the first mating member 31, used to establish an electrical connection with the socket 32 ​​or the female connector; "protective part 24" refers to the structural unit provided on the outer wall of the cover module 2 to cover the mating hole 23 circumferentially and provide mechanical and electrostatic protection for the female connector area; "female connector" refers to the interface formed by the protective part 24 and the pin 311 and used to accept the insertion of the male connector; "male connector" refers to the interface formed by the socket 32 ​​and the connector 25 and used to insert into the adjacent meter female connector; "side by side" refers to the arrangement of multiple pins 311 whose center lines are located on the same straight line or the plane of the same straight line and have a fixed spacing; "away from" is used to indicate the side that is structurally away from another feature.

[0082] In some examples, such as Figure 4 , Figure 6As shown, the cover module 2 is provided with a guide groove 26, and the PCB module 3 is provided with a guide plate 33. The guide plate 33 and the guide groove 26 are in an interlocking relationship. The insertion end of the guide groove 26 is provided with a second inclined guide surface 261, which is connected to the inner wall of the guide groove 26. When the guide plate 33 approaches the guide groove 26, it slides with the second inclined guide surface 261. When the insertion force direction is restricted or there is a positional deviation, the guide plate 33 gradually shifts towards the central axis of the guide groove 26 under the guidance of the second inclined guide surface 261, and finally inserts into the guide groove 26 and is positioned. The insertion path becomes smooth and stable, and the assembly process is more directional and operable.

[0083] It can be understood that this structure is a second-level guiding device between the cover module 2 and the PCB module 3 in the guide rail type meter. It forms a complementary guiding system with the aforementioned first guiding component 21 and first docking component 31. It forms multi-point constraints in the modular structure to prevent the skew caused by the accumulation of contact error of the pin 311. This allows the overall assembly relationship to obtain clear positioning control in multiple degrees of freedom. The guide groove 26 and the guide plate 33 can be set in multiple corresponding positions and distributed in a symmetrical or equidistant manner to balance the assembly force and improve the stability of the connection structure.

[0084] It is worth noting that, to avoid ambiguity, "guide plate 33" refers to the plate-like protruding structure set on the surface of PCB module 3, which is inserted into guide groove 26 in space and constrained by its geometric contour; "guide groove 26" refers to the elongated groove set on cover module 2, used to receive guide plate 33; "second inclined guide surface 261" refers to the guide slope set on the opening section of guide groove 26, used to initially correct the posture of guide plate 33. Through the above structural cooperation, the rail-mounted meter has a two-stage guiding structure during the connection process between cover module 2 and PCB module 3, with a clear positioning path, more directional insertion action, and a simplified assembly process to a certain extent.

[0085] In some implementations, combined with Figure 7 , Figure 8 The second guide member 22 is located on the cover module 2, and the second docking member 11 is located on the base module 1. The second guide member 22 includes a plug post 221, which axially extends through to form a plug groove 2211. The second docking member 11 includes a plug rod 111, which is plugged into the plug groove 2211. A third inclined guide surface 2212 is formed on the outer periphery of the insertion end of the plug groove 2211. The third inclined guide surface 2212 slides and abuts against the plug rod 111. In the early stage of assembly, the plug rod 111, which has position and posture deviations, is provided with lateral force guidance, so that it converges towards the center line of the plug groove 2211. The insertion force path is smoother and the probability of jamming is reduced to a certain extent.

[0086] For example, the base module 1 is provided with an abutment part 12, which is adapted to abut against the PCB module 3, so that the PCB module 3 can obtain additional support and limit inside the cover module 2, the Z-direction displacement is constrained, and the connection stability of the three is enhanced.

[0087] For example, combined Figure 7 , Figure 8 The PCB module 3 has a positioning groove 34, which is matched with the plug post 221 for limiting. During the assembly process, the PCB module 3 can be guided to the plug post 221 for a short stroke and then abut against the inner wall of the cover module 2. The geometric relationship between the positioning groove 34 and the plug post 221 provides a clear boundary for the lateral and angular degrees of freedom and suppresses the propagation of cumulative errors.

[0088] It is worth noting that the plug post 221 refers to the columnar guiding element fixed on the cover module 2, the plug groove 2211 refers to the groove structure that runs from the outside to the inside on the plug post 221, the plug rod 111 refers to the slender rod-shaped docking element fixed on the base module 1, the third inclined guide surface 2212 refers to the inclined surface with a certain included angle on the outer periphery of the guide section, the abutment part 12 refers to the support area on the base module 1 that forms a surface contact or line contact with the PCB module 3, and the positioning groove 34 refers to the groove on the PCB module 3 that forms a limiting relationship with the plug post 221.

[0089] Based on this, through the cooperation of the second guide component 22 and the second docking component 11, the guidance of the third inclined guide surface 2212, the support of the abutment part 12, and the limiting of the positioning groove 34, the cover module 2, the base module 1 and the PCB module 3 form hierarchical guidance and constraint in multiple degrees of freedom. The assembly path is clear, the repeatability of positioning accuracy is improved to a certain extent, the probability of rework is reduced, and the process is more stable.

[0090] For example, refer to Figure 7 The inner wall of the cover module 2 is provided with a buckle 27, and the outer wall of the base module 1 is provided with a slot 13. The buckle 27 is configured to engage with the slot 13 to confine the base module 1 within the cover module 2. The engagement between the buckle 27 and the slot 13 allows for a more stable connection between the cover module 2 and the base module 1. Furthermore, the engagement of the buckle 27 with the slot 13 indicates that the cover module 2 and the base module 1 are properly installed.

[0091] In some implementations, combined with Figure 3 , Figure 7 PCB module 3 includes PCB motherboard 35 and wiring terminal 36. The cover module 2 has a reserved wiring receiving slot 28. The wiring terminal 36 enters the wiring receiving slot 28 by plugging in and obtains a clear spatial posture and wiring lead-out direction control under the limiting action of the slot wall. The components are more compactly matched, and the utilization rate of the housing space is improved to a certain extent.

[0092] For example, a first cover plate 281 is hinged at the opening of the wiring receiving slot 28. During non-wiring operations, the first cover plate 281 covers the wiring terminal 36, serving both dustproof and contact-isolation purposes. During maintenance, it can be rotated 90° to form a viewing and operating window. Furthermore, the first cover plate 281 is made of anti-static material, reducing the tendency for static electricity accumulation in the wiring area during wire insertion / removal and screw tightening, which helps to reduce the impact of ESD on the relay 38 coil and the low-voltage sampling channel.

[0093] In some implementations, combined with Figure 3 , Figure 7 and Figure 9 PCB module 3 also includes a wiring frame assembly 37 and a relay 38. The relay 38 has a connecting strip 381, and the wiring frame assembly 37 has a connecting hole 371. The connecting strip 381 and the connecting hole 371 form a dual electrical and mechanical connection path through plug-in connection, facilitating quick assembly and disassembly when the relay 38 needs replacement or when the wiring frame assembly 37 needs modular adjustment according to different circuit configurations. The cover module 2 has a placement slot 29, into which the wiring frame assembly 37 is embedded. The circumferential and axial clearances are allocated according to injection molding tolerances and the coefficient of thermal expansion. Steps or ribs can be formed on the sidewalls of the placement slot 29 to restrict translational and angular freedom, thereby reducing the risk of loosening under vibration to a certain extent.

[0094] For example, a second cover plate 291 is hinged to the terminal block position on the cover module 2 at the terminal block assembly 37. The second cover plate 291 is located inside the first cover plate 281. The surface area of ​​the second cover plate 291 is smaller than that of the first cover plate 281. Under normal conditions, it covers the terminal block and can rotate 90° during wiring operations to form a partial opening. The path of the wire is restricted, reducing the probability of accidentally inserting scattered copper wires or short wire segments into the internal functional cavity. This has the significance of preventing mistakes and facilitates the sequential numbering and connection of wires by the maintenance end.

[0095] It is worth noting that in this embodiment, the terminal 36 refers to the wire terminal unit that is welded or screwed onto the PCB motherboard 35; the wire receiving groove 28 refers to the groove structure inside the cover module 2 that provides insertion and limiting for the terminal 36; the first cover plate 281 refers to the hinge that covers the opening of the wire receiving groove 28; the wire frame assembly 37 refers to the sub-assembly that carries multiple terminals and forms an electrical connection with the relay 38 or other functional elements; the connecting strip 381 on the relay 38 refers to the strip conductor used for mechanical positioning with the wire frame assembly 37 and conducting electrical signals; the connecting hole 371 refers to the through hole or flared hole on the wire frame assembly 37 that mates with the connecting strip 381; the placement groove 29 refers to the cavity on the cover module 2 used to embed the wire frame assembly 37; and the second cover plate 291 refers to the hinge located inside the first cover plate 281 and covering the wire head of the wire frame assembly 37.

[0096] Based on this, through the spatial layering configuration of the wiring receiving slot 28 and the placement slot 29, the partition protection of the two-level cover plates, the modular plug-in design of the wiring terminal 36 and the wiring frame combination 37, and the use of anti-static materials in the key cover plates, the whole machine maintains the compactness of the assembly while taking into account the reliability of wiring, electrostatic protection and maintainability. The number of steps for assembly and maintenance personnel in the field operation process is reduced to a certain extent, the risk of incorrect wiring and accidental contact is reduced, and the batch production and batch maintenance process is easier to standardize.

[0097] In some implementations, combined with Figure 10 , Figure 11 The cover module 2 is provided with a sliding groove 201. The sliding groove 201 has an opening structure parallel to the length direction of the DIN rail and presents a snap-fit ​​shape that matches the shape of the rail in cross-section, so that the cover module 2 can slide with the rail and move linearly on the rail track.

[0098] For example, the inner wall of the sliding groove 201 is further provided with a mounting sub-groove 2010. The mounting sub-groove 2010 is perpendicular to the guide rail and is used to mount the abutment 5. Specifically, the abutment 5 includes a first spring 51 and a retaining plate 52. The first spring 51 is disposed in the mounting sub-groove 2010, with one end fixed to the bottom of the sub-groove and the other end connected to the retaining plate 52. The retaining plate 52 extends toward the guide rail and protrudes from the opening of the sliding groove 201. Under the elastic force of the first spring 51, the retaining plate 52 will move toward the guide rail, thereby forming a contact abutment between the outer wall of the retaining plate 52 and the side wall of the guide rail.

[0099] Through this structural design, the clamping plate 52, driven by the elastic force provided by the first spring 51, forms a continuous and stable clamping force, which helps to stably attach the cover module 2 to the guide rail surface after the meter is installed, providing anti-loosening support in both the vertical and horizontal directions. To facilitate later maintenance and fine-tuning of the meter's position, the elastic clamping structure can instantly generate spring compression displacement under external force applied to the meter, thereby releasing the contact between the clamping plate 52 and the guide rail, allowing for sliding adjustment or removal without disassembling the overall meter structure.

[0100] It can be understood that the sliding groove 201 refers to the groove structure on the cover module 2 for sliding installation with the guide rail structure, and usually includes mutually cooperating limiting edges; the mounting sub-groove 2010 refers to the local receiving area set on the inner side wall of the sliding groove 201 for accommodating the elastic element; the first spring 51 refers to the elastic member for generating clamping force, which can be a helical spring or a leaf spring structure; the retaining plate 52 refers to the thin sheet-like structural element that is pushed by the spring and contacts the side wall of the guide rail. Through the above structure, the guide rail meter has a convenient guide rail installation method. The retaining plate 52 provides a positioning function for the meter to a certain extent, while the elastic force action mode is beneficial to balance stability and adjustment flexibility, and the installation and disassembly process is smoother.

[0101] In some implementations, combined with Figure 3 , Figure 9 The PCB module 3 has a touch area 39, and the cover module 2 has an insulating touch component 6 inside. The insulating touch component 6 and the touch area 39 are in a contacting relationship when assembled. The user can indirectly activate the touch area 39 and trigger a response signal by touching the outer surface of the cover module 2.

[0102] For example, the insulating touch component 6 includes a touch spring 61 and an insulating sleeve 62. The touch spring 61 is an elastic metal component, disposed inside the cover module 2 and in elastic contact with the touch area 39, used to convert external touch behavior into local small pressure, thereby triggering a change in the capacitance signal of the touch area 39. The insulating sleeve 62 is a sleeve structure covering the outside of the touch spring 61, which can be made of rubber or engineering plastic material with electrical insulation properties. On the one hand, it cooperates with the structure of the cover module 2 to define the spatial position of the touch spring 61, and on the other hand, it forms an insulating barrier outside the touch spring 61 to prevent the user from directly contacting the metal component, thereby reducing the risk of electric shock and suppressing interference from accidental touch signals to a certain extent.

[0103] It is understandable that since the touch area 39 uses a capacitive sensing method, when the user's finger touches the outer surface of the cover module 2, the local capacitance distribution of the touch area 39 is indirectly changed through the insulating sleeve 62 and the spring, and the touch chip can sense the charge change and respond to the command.

[0104] To achieve visual feedback, a light guide column 202 is also provided on the cover module 2. The light guide column 202 is electrically connected to the touch area 39. That is, after the touch area 39 is triggered, it can output a signal to control the light guide column 202 to turn on and off. The light guide column 202 can be made of optical materials such as transparent polycarbonate and integrally molded on the cover module 2 by in-mold injection molding, so that there is no mechanical gap between it and the outer shell material. This is beneficial to isolate external static power and dust particles from entering the cover, and helps to maintain the environmental adaptability and structural integrity of the rail-mounted meter during long-term operation.

[0105] It is worth noting that the touch area 39 refers to the area on the PCB module 3 that is preset to sense changes in capacitance and control the output of external signals. The touch spring 61 refers to the metal component with elastic recovery function set inside the cover module 2. The insulating sleeve 62 refers to the insulating component covering the outside of the touch spring 61. The light guide column 202 refers to the columnar element made of light-guiding material used to transmit light-emitting signals. In-mold injection molding refers to the structural connection method in which the light guide element is directly embedded into the plastic molding die during the injection molding process and solidified in one injection molding process. Through the collaborative design of the touch spring 61 and the insulating sleeve 62, and the integrated connection of the light guide column 202 and the cover module 2, the rail-mounted meter has a touch operation module with high safety, compact structure, and intuitive response.

[0106] In some implementations, combined with Figure 3 , Figure 12 and Figure 13 The rail-mounted meter also includes a connector 7. A connecting hole 112 is axially provided on the second mating member 11. The connector 7 is configured to axially pass through one end of the connecting hole 112 to the other end of the connecting hole 112 to connect the cover module 2 to the base module 1.

[0107] For example, the connector 7 can be in the form of a tubular rivet. The two ends of the connector 7 are located at the interface between the cover module 2 and the base module 1, and are nested with the connecting through hole 112 in the axial direction to form a connection relationship with axial limiting and tightening functions.

[0108] Furthermore, the cover module 2 is provided with a recessed groove 9, which is connected to the end of the connecting through hole 112 to accommodate the end of the connector 7. A lead seal cap 8 is embedded in the recessed groove 9. The lead seal cap 8 is a blocking structural element whose shape matches the recessed groove 9. Its placement in the recessed groove 9 can cover the tail end of the connector 7, while providing partial restraint and visual obstruction for the connector 7, which is beneficial to improving the reliability and safety of the connector 7 during long-term use. Using the connector 7 for connection can reduce the use of external threaded fasteners and avoid affecting the stability of the overall structure due to insufficient space or external disassembly.

[0109] In some alternative embodiments, a groove 9 may be correspondingly provided on the base module 1, and a lead cap 8 may be correspondingly embedded in the groove 9 of the base module 1, thereby limiting the connector 7 from both ends of the connecting hole 112.

[0110] It is understandable that, since the connector 7 is a tubular rivet structure, it can be fixed in the connecting through hole 112 by plastic deformation or pressing after axial insertion, making it less prone to loosening or misalignment, thereby enhancing the connection stability between the cover module 2 and the base module 1 to a certain extent. It should be clarified that the connecting through hole 112 refers to the through-hole structure that passes through the second mating part 11 and is used to insert the connector 7; the recessed groove 9 refers to the recessed area on the cover module 2 that communicates with the connecting through hole 112; and the lead seal cap 8 refers to the cap structure installed in the recessed groove 9 to cover and stabilize the tail end of the connector 7. Through the above structural design, the overall structure of the rail-mounted meter can be made more compact and secure at the connection points, with better sealing and ease of assembly and disassembly, while also meeting the actual needs of the meter in terms of lead sealing management or anti-tampering structures.

[0111] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0112] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0113] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0114] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A rail-mounted electricity meter, characterized in that, The device includes a base module, a cover module, and a PCB module. One of the cover module and the PCB module is provided with a first guide member, and the other is provided with a first mating member. The first guide member and the first mating member are configured to cooperate with each other during assembly to guide and connect the cover module and the PCB module. One of the cover module and the base module is provided with a second guide member, and the other is provided with a second docking member. The second guide member and the second docking member are configured to cooperate with each other during the assembly process to guide and connect the cover module and the base module.

2. The rail-mounted electricity meter according to claim 1, characterized in that, The cover module has a mating hole, and the first mating member is configured to insert into the mating hole under the action of the first guide member.

3. The rail-mounted electricity meter according to claim 2, characterized in that, The first guide member includes a guide rib and a guide portion. The guide rib is located inside the cover module on one side of the docking hole, and the guide portion is located on the guide rib. The guide portion is configured to guide the first docking member to face the docking hole.

4. The rail-mounted electricity meter according to claim 3, characterized in that, The guide portion has a first inclined guide surface and a guide surface. The guide surface is on the same plane as the inner wall of the docking hole. The first inclined guide surface is connected to the end of the guide surface away from the docking hole. The first inclined guide surface is configured to slide with the first docking member to guide the first docking member from the first inclined guide surface to the guide surface.

5. The rail-mounted electricity meter according to claim 3, characterized in that, The first guide member has multiple components on the outer periphery of the mating hole; The first docking component includes pins, and multiple pins are arranged side by side.

6. The rail-mounted electricity meter according to claim 5, characterized in that, The outer wall of the cover module is provided with a protective part, which is arranged around the outer periphery of the docking hole. The pin is located inside the protective part and forms a female adapter with the protective part. The PCB module has a socket at one end away from the pin, and the socket is configured to be plugged into and cooperate with the pin on another adjacent rail-mounted meter. The cover module has an insertion interface on its outer wall away from the protective part. The insertion interface and the socket cooperate to form a male connector. The male connector is configured to be inserted into the female connector on another adjacent rail-mounted meter.

7. The rail-mounted electricity meter according to claim 1, characterized in that, The cover module is provided with a guide groove, and the PCB module is provided with a guide plate, which is configured to insert and cooperate with the guide groove. The insertion end of the guide groove has a second inclined guide surface that communicates with the inner wall of the guide groove. The second inclined guide surface is configured to slide in cooperation with the guide plate to guide the guide plate into the guide groove.

8. The rail-mounted electricity meter according to claim 1, characterized in that, The second guide member is disposed on the cover module, and the second docking member is disposed on the base module; The second guide member includes a plug post with an axially penetrating plug groove, and the second mating member includes a plug rod configured to engage with the plug groove.

9. The rail-mounted electricity meter according to claim 8, characterized in that, The insertion end of the plug slot is provided with a third inclined guide surface on its outer periphery. The third inclined guide surface is configured to slide and abut against the plug rod to guide the plug rod into the plug slot.

10. The rail-mounted electricity meter according to claim 8, characterized in that, The base module is also provided with an abutment part, which is configured to abut against the PCB module to press the PCB module tightly into the cover module.

11. The rail-mounted electricity meter according to claim 8, characterized in that, The PCB module has a positioning groove, which is configured to engage with the plug post for limiting.

12. The rail-mounted electricity meter according to claim 1, characterized in that, The inner wall of the cover module is provided with a buckle, and the outer wall of the base module is provided with a slot. The buckle is configured to engage with the slot to confine the base module within the cover module.

13. The rail-mounted electricity meter according to claim 1, characterized in that, The PCB module includes a PCB motherboard and a terminal block. The terminal block is connected to the PCB motherboard. The cover module has a terminal block receiving slot, and the terminal block is configured to plug into the terminal block receiving slot.

14. The rail-mounted electricity meter according to claim 13, characterized in that, The cover module is hinged to a first cover plate at the opening of the wiring receiving slot, and the first cover plate is used to cover the wiring end; The first cover plate is made of antistatic material.

15. The rail-mounted electricity meter according to claim 1, characterized in that, The PCB module also includes a wiring frame assembly and a relay. The relay is provided with a connecting strip, and the wiring frame assembly is provided with a connecting hole. The connecting strip is configured to be inserted into the connecting hole.

16. The rail-mounted electricity meter according to claim 15, characterized in that, The cover module has a placement slot, and the wiring frame assembly can be embedded in the placement slot.

17. The rail-mounted electricity meter according to claim 15, characterized in that, A second cover plate is hinged to the cover module at the terminal of the wiring frame assembly, and the second cover plate is used to cover the wiring frame assembly.

18. The rail-mounted electricity meter according to claim 1, characterized in that, The cover module has a sliding groove configured to slide with the guide rail; the cover module is provided with a clamping member for pressing the cover module against the guide rail.

19. The rail-mounted electricity meter according to claim 18, characterized in that, The clamping member includes a first spring and a retaining plate. The inner wall of the sliding groove is provided with a mounting sub-groove. The first spring is located in the mounting sub-groove. The retaining plate abuts against the first spring. The first spring is configured to drive the retaining plate to move toward the guide rail side, so as to drive the retaining plate to abut against the side wall of the guide rail.

20. The rail-mounted electricity meter according to claim 1, characterized in that, The PCB module has a touch area, and the cover module is provided with an insulating touch component, which is configured to abut against the touch area.

21. The rail-mounted electricity meter according to claim 20, characterized in that, The insulating touch component includes a touch spring and an insulating sleeve. The touch spring abuts against the touch area, and the insulating sleeve is fitted onto the touch spring.

22. The rail-mounted electricity meter according to claim 20, characterized in that, The cover module is provided with a light guide column, which is electrically connected to the touch area. The light guide column is connected to the cover module by in-mold injection molding.

23. The rail-mounted electricity meter according to any one of claims 1 to 22, characterized in that, It also includes a connector, wherein the second mating member has an axially penetrating connecting hole, and the connector is configured to extend axially from one end of the connecting hole to the other end of the connecting hole to connect the cover module to the base module.

24. The rail-mounted electricity meter according to claim 23, characterized in that, The cover module is provided with a recessed groove, which is axially connected to the connecting through hole, and a lead seal cap is embedded in the recessed groove.

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