A terminal assembly for a smart meter

Abstract

The utility model relates to a kind of terminal block assemblies for intelligent electric meter.The technical problem to be solved by the utility model is to provide a terminal block assembly for intelligent electric meter.The technical scheme adopted by the utility model: including electric meter lower shell component and terminal block assembly, the terminal block assembly includes terminal block and terminal post combination, the terminal post combination includes terminal post and screw, the terminal post includes terminal post terminal and terminal post butt joint, the terminal post terminal includes terminal post semicircular arc part and terminal post trapezoidal part, the terminal post terminal end is equipped with terminal post terminal hole.The terminal block assembly for intelligent electric meter of the utility model has the advantages that: lower shell limiting stop block cooperates with terminal block placement into groove to effectively prevent the front and back sliding of terminal post during transportation and moving, and the anti-moving effect is good;Additional lock plate, the electric meter lower shell is locked to terminal block by lock plate, can limit unauthorized personnel to disassemble and assemble terminal block at will, improve operation safety.

Description

Technical Field

[0001] This utility model relates to a wiring terminal assembly for a smart meter. Background Technology

[0002] Smart meters are the most common electricity metering devices in residential and small commercial settings. Their core function is to accurately measure the electrical energy consumed in AC circuits through the principle of electromagnetic induction. A smart meter generally consists of a lower casing, an upper casing, an electromagnetic drive device, and an external terminal block assembly. The external terminal block assembly typically includes a terminal block socket and terminals for wiring. In practical use, it has been found that existing meter terminals are generally designed as cylinders. After being installed in the terminal block socket, they are only fixed in place by a single screw. Since the screw is often loosely connected at the factory, it is easy for the terminals to fall off or shift or even detach during transportation or installation due to vibration or impact. Poor reliability of the terminal block installation can lead to poor internal contact and inaccurate metering. To facilitate regular maintenance, existing terminal blocks are mostly installed in the lower casing using an embedded method, lacking effective limiting and locking structures. When subjected to external forces or high-temperature expansion and contraction, the terminal block is prone to slight displacement, affecting structural stability and overall performance. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a wiring terminal assembly for smart meters.

[0004] The technical solution adopted by the terminal assembly for a smart meter of this utility model is as follows: It includes a lower housing assembly of the meter and a terminal assembly detachably fixed on the lower housing assembly of the meter. The terminal assembly is characterized in that the terminal assembly includes a terminal base and a series of terminals spaced apart in the terminal base. The terminal assembly includes a terminal and a screw. The terminal includes a terminal connection part and a terminal mating part at the front end of the terminal connection part. The terminal connection part includes a semi-circular arc part and a trapezoidal part. The end of the terminal connection part is provided with a terminal connection hole for cable connection. The trapezoidal part of the terminal is provided with a terminal thread hole that is perpendicular to the terminal connection hole. The inner side of the terminal base is provided with terminal base insertion grooves for the horizontal passage of the terminal connection part. The bottom of the terminal base insertion groove is provided with a terminal base through hole for cable passage. The terminal base is provided with a terminal base waist-shaped hole corresponding to the trapezoidal part of the terminal. The screw passes through the terminal base waist-shaped hole and is threadedly connected to the terminal thread hole. The lower casing assembly of the electricity meter includes a lower casing of the electricity meter. The lower casing of the electricity meter is provided with a lower casing positioning groove for mounting and positioning the terminal block. The bottom of the lower casing positioning groove is provided with a lower casing limiting block for limiting the front end of the terminal connection part and abutting below the terminal connection part.

[0005] The outer walls of the left and right ends of the terminal block are provided with longitudinally arranged terminal block slots and terminal block guide slots. The terminal block slots are provided with terminal block blocks. The left and right side walls of the lower shell positioning groove are provided with lower shell inner blocks that correspond to the terminal block slots and engage with the terminal block blocks, as well as lower shell guide protrusions that correspond to the terminal block guide slots.

[0006] The lower casing assembly of the meter also includes a locking plate. The lower part of the lower casing is provided with a locking plate insertion port arranged longitudinally for inserting the locking plate, a lower casing locking action port arranged horizontally and communicating with the locking plate insertion port, and a lower casing external operation port arranged horizontally and communicating with the lower casing locking action port at the left and right side walls of the lower casing positioning groove. The left and right side walls of the terminal block are provided with terminal block locking grooves that communicate with the lower casing locking action port and are used for locking the locking plate.

[0007] The area of ​​the lower shell external operating port should be smaller than the area of ​​the locking plate.

[0008] The number of screws is 2.

[0009] The advantages of this utility model of a terminal block assembly for smart meters are as follows: the terminal posts adopt a semi-circular arc and trapezoidal part combined structural design, providing stronger mechanical limit and preventing the terminal posts from rotating in the terminal block; the lower shell limit block, together with the terminal block insertion groove, effectively prevents the terminal posts from sliding back and forth during transportation and handling, with good anti-movement effect; the addition of a locking plate, the lower shell of the meter locks the terminal block through the locking plate, which can restrict unauthorized personnel from arbitrarily disassembling and assembling the terminal posts, improving operational safety. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a schematic diagram of the internal structure of the wiring terminal assembly for the smart meter of this utility model; Figure 2 This is a structural schematic diagram of the terminal block assembly of this utility model; Figure 3 This is a schematic diagram of the terminal block assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the terminal block of this utility model; Figure 5 This is a schematic diagram of the inner structure of the terminal block of this utility model; Figure 6This is a schematic diagram of the outer structure of the terminal block of this utility model; Figure 7 This is a schematic diagram of the structure of the lower casing assembly of the electric meter according to this utility model; Figure 8 This is a schematic diagram of the structure of the lower casing of the electric meter of this utility model; Figure 9 yes Figure 8 Enlarged image. Detailed Implementation

[0012] like Figure 1-9 As shown, the present invention relates to a terminal block assembly for a smart meter, comprising a lower housing assembly 1 and a terminal block assembly 2 detachably fixed to the lower housing assembly 1. The terminal block assembly 2 includes a terminal base 3 and a terminal post assembly 4 spaced apart within the terminal base 3. The terminal post assembly 4 includes a terminal post 5 and a screw 6. Each terminal post 5 includes a terminal post connection portion 8 and a terminal post mating portion 9 located at the front end of the terminal post connection portion 8. The terminal post connection portion 8 includes a semi-circular portion 10 and a trapezoidal portion 11. The end of the terminal post connection portion 8 is provided with a terminal post connection hole 12 for cable connection. The trapezoidal portion 11 has a mating portion for connecting to the terminal post. The terminal block 3 has a vertically connected threaded hole 13 for the terminal block 12. The terminal block 3 has a terminal block insertion groove 15 at intervals on its inner side for the horizontal passage of the terminal block connection part 8. The bottom of the terminal block insertion groove 15 has a terminal block wire hole 16 for the cable to pass through. The terminal block 3 has a terminal block waist-shaped hole 17 corresponding to the trapezoidal part 11 of the terminal block. The screw 6 passes through the terminal block waist-shaped hole 17 and is threadedly connected to the terminal block threaded hole 13. The terminal block 5 adopts a semi-circular arc part and trapezoidal part matching structure design to provide stronger mechanical limit and prevent the terminal block 5 from rotating in the terminal block. The trapezoidal part 11 of the terminal block is perpendicular to the screw 6, which effectively ensures the correct wiring direction and reliable connection.

[0013] The lower casing assembly 1 of the electricity meter includes a lower casing 20. The lower casing 20 is provided with a lower casing positioning groove 23 for the installation and positioning of the terminal block 3. The bottom of the lower casing positioning groove 23 is provided with a lower casing limiting block 24 for limiting the front end of the terminal connection part 8 and abutting below the terminal connection part 9. The lower casing limiting block 24, together with the terminal block insertion groove 15, effectively prevents the terminal 5 from sliding back and forth during transportation and handling, and has a good anti-movement effect.

[0014] The terminal block 3 has a longitudinally arranged terminal block slot 26 and a terminal block guide groove 28 on the outer wall of its left and right ends. The terminal block slot 26 is provided with a terminal block block 27. The lower shell positioning groove 23 has a lower shell inner block 29 on its left and right side walls that corresponds to the terminal block slot 26 and engages with the terminal block block 27, and a lower shell guide protrusion 30 that corresponds to the terminal block guide groove 28. The engagement structure ensures that the terminal block is "positioned at a fixed point" in the lower shell, avoiding overall movement or misalignment. The modular installation design facilitates rapid batch assembly and improves manufacturing efficiency.

[0015] The lower casing assembly 1 of the electricity meter also includes a locking plate 21. The lower part of the lower casing 20 has a locking plate insertion port 32 arranged longitudinally for inserting the locking plate 21, a lower casing locking action port 33 arranged horizontally and communicating with the locking plate insertion port 32, and a lower casing external operation port 34 arranged horizontally and communicating with the lower casing locking action port 33 on the left and right side walls of the lower casing positioning groove 23. The left and right side walls of the terminal block 3 have terminal block locking grooves 35 that communicate with the lower casing locking action port 33 and are used for locking the locking plate 21. The addition of the locking plate 21 effectively improves the reliability and safety of the terminal block installation. The locking plate 21 is controlled by the lower casing external operation port 34 to restrict unauthorized personnel from arbitrarily disassembling and assembling the wiring terminals, thereby improving operational safety. The locking structure firmly locks the terminal block in the lower casing of the electricity meter, preventing accidental contact or vibration-induced dislodgement.

[0016] The area of ​​the lower shell external operating port 34 is smaller than the area of ​​the locking plate 21, effectively preventing the locking plate 21 from falling out from here.

[0017] The number of screws 6 is 2. The double screw structure (instead of a single screw) improves the crimping stability after cable installation and prevents loosening due to vibration.

[0018] Terminal block assembly installation process: Insert the terminal part 8 of terminal 5 into the terminal block insertion groove 15 from the inside of terminal block 3. Then, loosely connect the screw 6 through the waist-shaped hole 17 of terminal block 11 to the terminal thread hole 13 on the trapezoidal part 11 of terminal 5. Then, connect terminal block 3 to the lower shell inner locking block 29 from top to bottom through terminal block locking block 27. At the same time, the lower shell limiting block 24 abuts against the lower part 9 of terminal 5 and cooperates with the terminal block insertion groove 15 to limit the front and rear movement of terminal 5. The operator moves the locking plate 21 through the lower shell outer operating port 34, so that it moves from the lower shell locking action port 33 to the terminal block locking groove 35, realizing the interlock between the lower shell 20 of the meter and the terminal block 3.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A terminal block assembly for a smart meter, comprising a lower housing assembly (1) of the meter and a terminal block assembly (2) detachably fixed to the lower housing assembly (1), characterized in that: The terminal assembly (2) includes a terminal block (3) and a terminal post assembly (4) spaced apart within the terminal block (3). The terminal post assembly (4) includes a terminal post (5) and a screw (6). The terminal post (5) includes a terminal post connection portion (8) and a terminal post mating portion (9) located at the front end of the terminal post connection portion (8). The terminal post connection portion (8) includes a terminal post semi-circular arc portion (10) and a terminal post trapezoidal portion (11). The end of the terminal post connection portion (8) is provided with a terminal post connection hole (12) for cable connection. The terminal post trapezoidal portion... (11) is provided with a terminal thread hole (13) that is perpendicular to the terminal connection hole (12). The inner side of the terminal base (3) is provided with a terminal base insertion groove (15) for the horizontal passage of the terminal connection part (8). The bottom of the terminal base insertion groove (15) is provided with a terminal base wire hole (16) for the cable to pass through. The terminal base (3) is provided with a terminal base waist-shaped hole (17) corresponding to the trapezoidal part (11) of the terminal. The screw (6) passes through the terminal base waist-shaped hole (17) and is threadedly connected to the terminal thread hole (13). The lower casing assembly (1) of the meter includes a lower casing (20), and the lower casing (20) is provided with a lower casing positioning groove (23) for the installation and positioning of the terminal block (3). The bottom of the lower casing positioning groove (23) is provided with a lower casing limiting block (24) for limiting the front end of the terminal wiring part (8) and abutting below the terminal docking part (9).

2. The terminal block assembly for a smart meter according to claim 1, characterized in that: The terminal block (3) has a longitudinally arranged terminal block slot (26) and a terminal block guide groove (28) on the outer wall of the left and right ends. The terminal block slot (26) is provided with a terminal block block (27). The lower shell positioning groove (23) has a lower shell inner block (29) on the left and right side walls that corresponds to the terminal block slot (26) and engages with the terminal block block (27), and a lower shell guide protrusion (30) that corresponds to the terminal block guide groove (28).

3. The terminal block assembly for a smart meter according to claim 2, characterized in that: The lower casing assembly (1) of the meter also includes a locking plate (21). The lower part of the lower casing (20) is provided with a locking plate insertion port (32) arranged longitudinally for the locking plate (21) to be inserted, a lower casing locking action port (33) arranged horizontally and communicating with the locking plate insertion port (32), and a lower casing external operation port (34) arranged horizontally and communicating with the lower casing locking action port (33). The left and right side walls of the terminal block (3) are provided with terminal block locking grooves (35) that communicate with the lower casing locking action port (33) and are used for locking the locking plate (21).

4. The terminal block assembly for a smart meter according to claim 3, characterized in that: The area of ​​the lower shell external operating port (34) is smaller than the area of ​​the locking plate (21).

5. The terminal block assembly for a smart meter according to claim 1, characterized in that: The number of screws (6) is 2.

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