An electronic electric energy meter convenient for automated batch assembly

Abstract

The present invention discloses an electronic electric energy meter that is convenient for automated batch assembly, comprising a relay, a PCB board, and a conductive copper column; the relay has a lead-out plate for connecting to a load end; the PCB board is arranged above the relay; the conductive copper column is vertically connected between the PCB board and the lead-out plate; the bottom end surface of the conductive copper column and the upper surface of the lead-out portion of the lead-out plate can be fixed at a selectable position by welding, and a weld nugget is formed at the welding point, so that the conductive copper column and the lead-out portion of the lead-out plate are connected as one body by utilizing the weld nugget. The present invention can not only realize a sampling scheme for automated batch production of modules, thereby reducing labor costs and improving assembly efficiency; it can also adjust the lead-out position of the sampling pin on the lead-out plate according to the hole position of the PCB board, thereby increasing the degree of freedom in the hole position design of the PCB board and making it easier to realize automation.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic instruments, and in particular to an electronic electric energy meter which is convenient for automatic batch assembly. Background Art

[0002] An electronic energy meter is an electronic instrument that samples the user's power supply voltage and current in real time. Using a dedicated energy meter integrated circuit, it processes the sampled voltage and current signals, multiplies them, and converts them into pulse outputs proportional to the electrical energy. This output is then displayed on a meter or digital display. An electronic energy meter typically consists of a relay and a printed circuit board (PCB). The relay's lead is typically connected to the load, and the shunt used for signal sampling is also typically located within the lead. The shunt's sampling signal is then connected to the PCB. An electronic energy meter in the prior art requires that the lead-out plate of the relay be connected to a terminal block in a flat surface according to application requirements. In addition, due to the volume limitation of the electronic energy meter, the thickness of the electronic energy meter is usually increased, that is, the distance between the lead-out plate and the PCB board above the relay is relatively far. This electronic energy meter in the prior art mainly adopts two methods to connect the sampling signal of the lead-out plate to the PCB board. One method is to use a signal wire welding method to weld one end of the signal wire to the sampling position of the lead-out plate, and the other end of the signal wire is welded and fixed to the PCB board by utilizing the flexibility and elongation of the signal wire. However, due to the flexibility of the signal wire, this connection method requires increased labor costs for manual soldering of the signal wire and the PCB board during the product assembly process, resulting in extremely high labor costs and extremely low labor efficiency, making it unsuitable for modern automated mass production. Another method is to directly bend the lead-out plate or adapter plate (connected between the lead-out plate and the terminal block) 90° from the lower area of ​​the relay upward to form a sampling pin and connect it to the PCB board above the relay. This method has the following disadvantages: first, the lead-out plate or adapter plate is made of copper material, and the copper material used is relatively large, resulting in increased production costs; second, the pin processing is difficult, and the size cannot be guaranteed, which easily leads to the disadvantage of not being compatible with the PCB board. Summary of the Invention

[0003] The object of the present invention is to overcome the shortcomings of the prior art and provide an electronic electric energy meter that is easy to automatically batch assemble. Through structural improvements, on the one hand, a sampling scheme for automated batch production of modules can be realized, thereby reducing labor costs and improving assembly efficiency; on the other hand, the lead-out position of the sampling pin on the lead-out sheet can be adjusted according to the hole position of the PCB board, thereby increasing the degree of freedom in the hole position design of the PCB board and making it easier to realize automation.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an electronic electric energy meter that is easy to automatically batch assemble, including a relay and a PCB board; the relay has a lead-out plate for connecting to the load end; the lead-out plate includes a lead-out portion that extends horizontally from one side surface of the relay with the board surface; the PCB board is horizontally arranged above the relay; it is characterized in that: the electric energy meter also includes a conductive copper column; the conductive copper column is vertically connected between the PCB board and the lead-out portion of the lead-out plate; the bottom end surface of the conductive copper column and the upper surface of the lead-out portion of the lead-out plate can be fixed at an optional position by welding, and a weld nugget is formed at the welding point during welding, so that the conductive copper column and the lead-out portion of the lead-out plate are connected into one piece by utilizing the weld nugget, thereby realizing the automatic assembly of the electric energy meter.

[0005] The PCB board is provided with a welding hole at the connection position with the conductive copper column. The upper end of the conductive copper column is inserted into the welding hole of the PCB board and fixed thereto by soldering.

[0006] The bottom end surface of the conductive copper column is attached to the upper surface of the lead-out portion of the lead-out piece, and a small bulge protruding downward is provided on the bottom end surface of the conductive copper column, so that the small bulge melts between the bottom end surface of the conductive copper column and the lead-out portion of the lead-out piece during arc welding to form the weld core, thereby fixing the conductive copper column on the lead-out portion of the lead-out piece.

[0007] The upper surface of the lead-out portion of the lead-out piece has a sunken portion formed during arc welding at a position corresponding to the small bulge on the bottom end surface of the conductive copper column. The sunken portion is completely filled with the weld core formed by melting the upper surface of the lead-out portion and the small bulge into one during arc welding, so that the conductive copper column is fixed to the lead-out portion of the lead-out piece.

[0008] The conductive copper column is cylindrical.

[0009] The bottom end of the conductive copper column is provided with a convex edge extending toward the periphery, so that the peripheral size of the bottom end surface of the conductive copper column is larger than the cross-sectional size of the conductive copper column.

[0010] The upper end of the conductive copper column is configured as a pin-type structure, and the pin-type structure of the conductive copper column is plugged into the soldering hole of the PCB board and fixed to the PCB board by soldering.

[0011] The small bulge is arranged in the middle of the bottom end surface of the conductive copper column.

[0012] The electric energy meter also includes a copper busbar, and the lead-out portion of the lead-out piece includes a first horizontal piece extending outward from one side surface of the relay, a second horizontal piece used to connect to the copper busbar, and a vertical piece connected between the first horizontal piece and the second horizontal piece; and the position of the second horizontal piece is higher than that of the first horizontal piece; the bottom end surface of the conductive copper column is connected to the second horizontal piece.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention adopts a method of connecting a conductive copper column vertically between the PCB board and the lead-out portion of the lead-out piece; the bottom end surface of the conductive copper column and the upper surface of the lead-out portion of the lead-out piece can be fixed at a selectable position by welding, and a weld nugget is formed at the welding point, so that the conductive copper column and the lead-out portion of the lead-out piece are connected as a whole by utilizing the weld nugget, thereby realizing the automated assembly of the electric energy meter. This structure of the present invention, on the one hand, can realize a sampling scheme for automated batch production of modules, thereby achieving the purpose of reducing labor costs and improving assembly efficiency; on the other hand, the lead-out position of the sampling pin on the lead-out piece can be adjusted according to the hole position of the PCB board, thereby making the hole position design of the PCB board more free and easier to realize automation.

[0015] 2. The present invention utilizes a small downwardly projecting bulge on the bottom end surface of the conductive copper post. The bulge melts between the bottom end surface of the conductive copper post and the top surface of the lead-out portion of the lead-out plate during arc welding to form a weld nugget, thereby securing the conductive copper post to the lead-out portion of the lead-out plate. This structure of the present invention utilizes the small bulge on the bottom end surface of the conductive copper post to achieve arc welding. The bulge melts between the bottom end surface of the conductive copper post and the lead-out portion of the lead-out plate during arc welding, allowing the conductive copper post to be selectively secured to the lead-out portion of the lead-out plate, thereby facilitating automated assembly of the electric energy meter.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the electronic electric energy meter that is convenient for automated batch assembly of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0018] Figure 2 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention (with the PCB removed);

[0019] Figure 3 1 is a top view of an embodiment of the present invention (with the PCB removed);

[0020] Figure 4 It is along Figure 3 Cross-sectional view of line AA in FIG (the small convex bud is not melted);

[0021] Figure 5 yes Figure 4 A partial enlarged schematic diagram (the small convex bract is not melted);

[0022] Figure 6 It is along Figure 3 Cross-sectional view along line AA in FIG (the small bulge has been melted);

[0023] Figure 7 yes Figure 6 A partial enlarged schematic diagram (the small convex bract has been melted);

[0024] Figure 8 is a schematic diagram of the three-dimensional structure of a conductive copper column according to an embodiment of the present invention;

[0025] Figure 9 3D is a schematic diagram of the three-dimensional structure of a conductive copper column according to an embodiment of the present invention (tilted at a certain angle). DETAILED DESCRIPTION

[0026] Example

[0027] See also Figures 1 to 9 As shown, an electronic electric energy meter that is convenient for automated batch assembly of the present invention includes a relay 1 and a PCB board 2; the relay 1 has a lead plate 3 for connecting to a load terminal; the lead plate 3 includes a lead portion 4 extending horizontally from one side surface of the relay; the PCB board 2 is horizontally arranged above the relay 1; the electric energy meter also includes a conductive copper pillar 5; the conductive copper pillar 5 is vertically connected between the PCB board 2 and the lead portion 4 of the lead plate 3; the PCB board 2 has a welding hole 21 at the connection with the conductive copper pillar 5, the upper end of the conductive copper pillar 5 is inserted into the welding hole 21 of the PCB board 2 and fixed to the conductive copper pillar 5 by soldering; the bottom end surface of the conductive copper pillar 5 is fixed to the upper surface 41 of the lead portion 4 of the lead plate 3 by welding at a selectable position, and a weld nugget 6 is formed at the weld joint, so that the conductive copper pillar 5 and the lead portion 4 of the lead plate 3 are connected to each other as a whole by the weld nugget 6, thereby realizing automated assembly of the electric energy meter.

[0028] In this embodiment, the bottom end surface of the conductive copper column 5 is attached to the upper surface of the lead-out portion 4 of the lead-out piece 3, and a small bulge 51 protruding downward is provided on the bottom end surface of the conductive copper column 5, so that the small bulge 51 melts between the bottom end surface of the conductive copper column 5 and the lead-out portion 4 of the lead-out piece 3 during arc welding to form the weld core 6, thereby fixing the conductive copper column 5 on the lead-out portion 4 of the lead-out piece 3.

[0029] In this embodiment, the upper surface 41 of the lead-out portion 4 of the lead-out piece 3 has a sunken portion formed during arc welding at a position corresponding to the small bulge 51 on the bottom end surface of the conductive copper column 5. The sunken portion is completely filled with the weld core 6 formed by melting the upper surface 41 of the lead-out portion and the small bulge 51 into one during arc welding, so that the conductive copper column 5 is fixed to the lead-out portion 4 of the lead-out piece.

[0030] In this embodiment, the conductive copper pillar 5 is cylindrical.

[0031] In this embodiment, the bottom end of the conductive copper pillar 5 is provided with a convex edge 52 extending toward the periphery, so that the peripheral size of the bottom end surface of the conductive copper pillar 5 is larger than the cross-sectional size of the conductive copper pillar 5, thereby enhancing the welding strength between the conductive copper pillar 5 and the lead-out portion 4 of the lead-out sheet 3.

[0032] In this embodiment, the upper end of the conductive copper pillar 5 is configured as a pin-type structure 53 , which is plugged into the soldering hole 21 of the PCB board 2 and fixed to the PCB board 2 by soldering.

[0033] In this embodiment, the small bulge 51 is provided in the middle of the bottom end surface of the conductive copper column 5 .

[0034] In this embodiment, the electric energy meter also includes a copper busbar 7, and the lead-out portion 4 of the lead-out piece 3 includes a first horizontal piece 42 extending outward from one side surface of the relay, a second horizontal piece 43 for connecting to the copper busbar, and a vertical piece 44 connected between the first horizontal piece 42 and the second horizontal piece 43; and the position of the second horizontal piece 42 is higher than that of the first horizontal piece 42; the bottom end surface of the conductive copper column 5 is connected to the second horizontal piece 43.

[0035] The present invention provides an electronic electric energy meter that is easy to assemble in batches automatically. The conductive copper pillar 5 is connected vertically between the PCB board 2 and the lead-out portion 4 of the lead-out piece 3. The bottom end surface of the conductive copper pillar 5 and the upper surface of the lead-out portion 4 of the lead-out piece can be fixed at a selectable position by welding, and a weld nugget 6 is formed at the welding point. The weld nugget 6 is used to connect the conductive copper pillar 5 and the lead-out portion 4 of the lead-out piece into one piece, thereby realizing the automated assembly of the electric energy meter. This structure of the present invention, on the one hand, can realize a sampling scheme for automated batch production of modules, thereby achieving the purpose of reducing labor costs and improving assembly efficiency. On the other hand, the lead-out position of the sampling pin on the lead-out piece can be adjusted according to the hole position of the PCB board, thereby making the hole position design of the PCB board more free and easier to realize automation. The present invention employs a small downwardly projecting bulge 51 provided on the bottom end surface of the conductive copper pillar 5. The bulge 51 is used to melt between the bottom end surface of the conductive copper pillar 5 and the lead portion 4 of the lead tab 3 during arc welding to form the weld nugget, thereby securing the conductive copper pillar 5 to the lead portion 4 of the lead tab. This structure of the present invention utilizes the small bulge 51 on the bottom end surface of the conductive copper pillar to achieve arc welding. The bulge 51 melts between the bottom end surface of the conductive copper pillar 5 and the lead portion of the lead tab during arc welding, allowing the conductive copper pillar to be selectively secured to the lead portion of the lead tab, thereby facilitating automated assembly of the electric energy meter.

[0036] During welding, the present invention applies voltage to the conductive copper pillar 5 and the lead-out piece 3. The small bulge 51 of the conductive copper pillar 5 will preferentially contact the upper plane of the lead-out part 4 of the lead-out piece 3. At the moment when the small bulge 51 contacts the upper plane of the lead-out part 4 of the lead-out piece 3, the principle of arc initiation by the bulge is utilized to instantly discharge and melt the small bulge 51 and the upper plane part of the lead-out part 4 of the lead-out piece 3 that the small bulge 51 contacts at high temperature. At the same time, a certain pressure is continued to be applied to the conductive copper pillar 5 so that the bottom end surface of the conductive copper pillar 5 fits the upper plane of the lead-out part 4 of the lead-out piece 3. The welding process is completed after the power is turned off and solidification occurs. The structure of the present invention is to first fix the conductive copper pillar 5 on the lead-out piece 3, and then weld the conductive copper pillar 5 to the PCB board 2 to fix it. This can realize the sampling scheme of automated mass production of modules, thereby achieving the purpose of reducing labor costs and improving assembly efficiency. The structure of the present invention utilizes the small bulge 51 of the conductive copper pillar 5 to fix it to the lead-out piece 3. Therefore, the conductive copper pillar 5 can be matched with any position of the second horizontal piece 42 of the lead-out part 4 of the lead-out piece 3. In this way, the lead-out position of the sampling pin on the lead-out piece can be adjusted according to the hole position of the PCB board, thereby making the hole position design of the PCB board more flexible and easier to realize automation.

[0037] In the present invention, the qualifiers such as upper, lower, side, bottom, etc. only indicate the relative position relationship between components or structures within components. For example, a relay such as Figure 1 When installed as shown, the PCB is above the relay. When the relay is rotated 90 degrees, the PCB is on the side of the relay.

[0038] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent equivalent embodiment. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An electronic energy meter convenient for automated batch assembly, comprising a relay and a PCB; the relay having a lead tab for connecting to a load terminal; the lead tab including a lead portion extending horizontally from one side surface of the relay; the PCB being disposed horizontally above the relay; and characterized in that: The electric energy meter also includes a conductive copper column; the conductive copper column is vertically connected between the PCB board and the lead-out portion of the lead-out plate; the bottom end surface of the conductive copper column and the upper surface of the lead-out portion of the lead-out plate can be fixed at a selectable position by welding, and a weld nugget is formed at the welding position during welding, so that the conductive copper column and the lead-out portion of the lead-out plate are connected as a whole by utilizing the weld nugget, thereby realizing the automated assembly of the electric energy meter.

2. The electronic electric energy meter that is convenient for automated batch assembly according to claim 1 is characterized in that: The PCB board is provided with a welding hole at the connection position with the conductive copper column. The upper end of the conductive copper column is inserted into the welding hole of the PCB board and fixed thereto by soldering.

3. The electronic electric energy meter that is convenient for automated batch assembly according to claim 1 is characterized in that: The bottom end surface of the conductive copper column is attached to the upper surface of the lead-out portion of the lead-out piece, and a small bulge protruding downward is provided on the bottom end surface of the conductive copper column, so that the small bulge melts between the bottom end surface of the conductive copper column and the lead-out portion of the lead-out piece during arc welding to form the weld core, thereby fixing the conductive copper column on the lead-out portion of the lead-out piece.

4. The electronic electric energy meter that is convenient for automated batch assembly according to claim 3 is characterized in that: The upper surface of the lead-out portion of the lead-out piece has a sunken portion formed during arc welding at a position corresponding to the small bulge on the bottom end surface of the conductive copper column. The sunken portion is completely filled with the weld core formed by melting the upper surface of the lead-out portion and the small bulge into one during arc welding, so that the conductive copper column is fixed to the lead-out portion of the lead-out piece.

5. The electronic electric energy meter that is convenient for automated batch assembly according to claim 1, 2, 3 or 4, characterized in that: The conductive copper column is cylindrical.

6. The electronic electric energy meter that is convenient for automated batch assembly according to claim 5 is characterized in that: The bottom end of the conductive copper column is provided with a convex edge extending toward the periphery, so that the peripheral size of the bottom end surface of the conductive copper column is larger than the cross-sectional size of the conductive copper column.

7. The electronic electric energy meter that is convenient for automated batch assembly according to claim 2 is characterized in that: The upper end of the conductive copper column is configured as a pin-type structure, and the pin-type structure of the conductive copper column is plugged into the soldering hole of the PCB board and fixed to the PCB board by soldering.

8. The electronic electric energy meter that is convenient for automated batch assembly according to claim 3 or 4, characterized in that: The small bulge is arranged in the middle of the bottom end surface of the conductive copper column.

9. The electronic electric energy meter that is convenient for automated batch assembly according to claim 1, 2 or 3, characterized in that: The electric energy meter also includes a copper busbar, and the lead-out portion of the lead-out piece includes a first horizontal piece extending outward from one side surface of the relay, a second horizontal piece used to connect to the copper busbar, and a vertical piece connected between the first horizontal piece and the second horizontal piece; and the position of the second horizontal piece is higher than that of the first horizontal piece; the bottom end surface of the conductive copper column is connected to the second horizontal piece.

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