A multi-circuit multifunctional ammeter

Abstract

The utility model discloses a kind of multi-loop multifunctional electric meter, including bottom shell, cover shell, first circuit board, second circuit board and third circuit board, second circuit board and third circuit board are all equipped with terminal block, bottom shell and cover shell are also equipped with installation throughport, the inner chamber bottom of bottom shell is integrally formed with the mounting seat of plate shape on left and right sides, the upper end of mounting seat is inserted into the inner chamber of cover shell, and first clamping part is equipped on the outer side wall surface of mounting seat, first clamping part is used to clamp cover shell, second circuit board is supported and placed in the top of mounting seat, and second clamping part is also equipped on the top wall surface of mounting seat, second clamping part is used to clamp second circuit board, mounting seat is also limited to left and right sides relative to third circuit board, and third clamping part is also equipped on the inner side wall surface of mounting seat, third clamping part is used to clamp third circuit board. The utility model does not need screw in the whole installation process, avoids complicated installation step, and overall structure design is reasonable and convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter technology, and in particular to a multi-circuit, multi-functional electricity meter. Background Technology

[0002] An electricity meter is short for an energy meter. It is an instrument used to measure electrical energy, also known as a kilowatt-hour meter, fire meter, or kilowatt-hour meter. Currently, electricity meters are widely used in production and daily life. They typically employ dedicated large-scale integrated circuits and surface mount technology (SMT) manufacturing processes, and have functions such as energy metering, data processing, real-time monitoring, and information exchange. However, current electricity meters often have multiple circuits fixed to the bottom casing with screws, making installation inconvenient and the structural design unreasonable. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-circuit multi-function meter, which has the characteristics of reasonable structural design and convenient installation.

[0004] The technical solution adopted by this utility model to solve its technical problem is a multi-circuit multi-function meter, including a bottom shell, a cover shell, a first circuit board, a second circuit board, and a third circuit board. The bottom shell and the cover shell are fitted together to form a mounting cavity. The first circuit board, the second circuit board, and the third circuit board are stacked sequentially from top to bottom within the mounting cavity. The second circuit board and the third circuit board are each provided with a terminal block. The bottom shell and the cover shell are also provided with mounting openings for installing the corresponding terminal blocks. The bottom of the inner cavity of the bottom shell has integrally formed plate-shaped mounting seats on both the left and right sides. The upper end of the mounting base is inserted into the inner cavity of the cover shell, and a first locking member is provided on the outer wall of the mounting base for locking the cover shell. The second circuit board is supported and placed on the top of the mounting base, and a second locking member is provided on the top wall of at least one mounting base for locking the second circuit board. The mounting base is also positioned relative to the left and right sides of the third circuit board, and a third locking member is provided on the inner wall of at least one mounting base for locking the third circuit board. The wiring portion of the terminal block is located outside the bottom shell and the cover shell.

[0005] The advantages of the above technical solution are as follows: The mounting cavity formed by the snap-fit ​​of the bottom shell and the cover shell provides the necessary space to accommodate the components, including the first circuit board, the second circuit board, and the third circuit board, as well as the electronic components mounted on them. The first circuit board, the second circuit board, and the third circuit board are arranged sequentially from top to bottom, effectively utilizing the internal space of the mounting cavity. By setting the second circuit board and the third circuit board with terminal blocks, the purpose of more wiring circuits in the energy meter can be achieved, thus enhancing its functionality. By setting the mounting base with the first, second, and third locking components, the snap-fit ​​with the cover shell and the effective positioning of the second and third circuit boards can be achieved. The installation of the cover shell, the second circuit board, and the third circuit board does not require screws, avoiding cumbersome installation steps. Furthermore, the wiring part of the terminal block is located on the outside of the bottom shell and the cover shell, which facilitates wiring. Therefore, the overall structural design is reasonable and the installation is convenient.

[0006] In this embodiment, the mounting base includes a vertical substrate and a horizontal substrate. The first clip, the second clip, and the third clip are all disposed on the vertical substrate. The horizontal substrate is disposed at the front and rear ends of the inner side of the vertical substrate and cooperates with the mounting notch on the third circuit board. The top of the horizontal substrate is also flush with the top of the vertical substrate, and a positioning protrusion is provided at the connection between the vertical substrate and the horizontal substrate.

[0007] The advantages of the above technical solution are as follows: During installation, the mounting notch on the third circuit board is aligned with the horizontal substrate. The third circuit board is positioned front to back by the cooperation of the horizontal substrate and the mounting notch. At the same time, the vertical substrates on both sides also position the third circuit board left to right, thus ensuring that the third clip effectively limits the third circuit board. Meanwhile, the second circuit board will also be attached to the top of the vertical and horizontal substrates. The positioning protrusions and the second clip also effectively limit the second circuit board, thus ensuring the relative position of the second and third circuit boards. After installation, there will be no obvious shaking, making it safer and more reliable to use.

[0008] Furthermore, a pair of limiting ribs are protruding on the front and rear side walls of the inner cavity of the cover shell. The lower ends of the limiting ribs are inserted into the inner cavity of the bottom shell, and the limiting ribs interact with the front and rear side walls of the inner cavity of the bottom shell.

[0009] The advantages of adopting the above technical solution are: the setting of the limiting ribs will form contact and limit with the inner cavity side wall of the bottom shell after the bottom shell and the cover shell are clamped together, so that the bottom shell and the cover shell are less likely to move in position and the fit between the bottom shell and the cover shell is better.

[0010] Furthermore, the bottom of the outer side of the limiting rib is provided with an inclined surface, and a reinforcing rib is also provided on the inner side of the limiting rib.

[0011] The advantages of adopting the above technical solution are: the inclined surface facilitates the smooth insertion of the limiting rib into the inner cavity of the bottom shell, and it is not easy to break during the assembly process. The reinforced rib makes the limiting rib stronger and safer to use.

[0012] Furthermore, support ribs are protruding on the front and rear side walls of the inner cavity of the bottom shell, and the third circuit board is placed on the support ribs.

[0013] The advantages of adopting the above technical solution are: by setting up supporting ribs, the third circuit board is supported, thereby achieving the goal of reliable use of the terminal block.

[0014] Furthermore, the mounting openings are provided on the cover shell in two positions, one in front of the other. A stop block is provided on one side of the mounting opening on the front side. The stop block has a first breakable structure on its upper and lower sides. A baffle is provided in the mounting opening on the rear side. The baffle has a second breakable structure on its upper and lower sides.

[0015] The advantages of the above technical solution are as follows: By setting a stop block with a first easily breakable structure, the mounting opening on the front side of the cover has a filling function, thereby avoiding a large amount of empty space on one side of the mounting opening. The stop block can be removed according to the customer's needs to change the number of reserved positions for the mounting opening. By setting a baffle with a second easily breakable structure, the mounting opening on the rear side of the cover also has a filling function. During production, the baffle can be removed according to the customer's needs to change the number of terminal blocks. Therefore, the setting of the stop block and baffle realizes the reserved function and also makes the overall appearance of the product more beautiful and the structural design more reasonable.

[0016] Furthermore, the electricity meter also includes a transparent plate, the cover has a display window, the transparent plate has a protrusion, the protrusion is fitted into the display window, and the edge of the transparent plate is also provided with welded ribs around the protrusion.

[0017] The advantages of the above technical solution are as follows: by setting a transparent plate with protrusions, the display window can be covered without affecting the display effect, thereby preventing the intrusion of dust and moisture. The transparent plate is connected to the inner wall of the cover by welding ribs, which makes the installation of the transparent plate highly stable. At the same time, the surface of the cover has no obvious connection structure, and the appearance is more beautiful.

[0018] Furthermore, the energy meter also includes a flexible button. The transparent plate forms a groove on one side of the protrusion. The groove accommodates the flexible button and has a first through hole on its bottom surface. The first through hole corresponds to the pushing part at the lower end of the flexible button. The cover also has a second through hole corresponding to the first through hole. The pressing part at the upper end of the flexible button protrudes out of the cover through the second through hole.

[0019] The advantages of the above technical solution are: the transparent plate and the cover cooperate to clamp and fix the flexible button, and by setting the groove, the flexible button is prevented from shifting or falling off after being pressed repeatedly, thus improving the installation reliability of the flexible button. At the same time, the first and second through holes are set in the groove and on the cover to prevent the flexible button from being linked when pressed, making it safer to use.

[0020] Furthermore, the transparent plate is provided with a light-transmitting column on one side of the protrusion. The light-transmitting column is a hollow structure with an opening at the bottom, and the cover shell is provided with a light-transmitting hole corresponding to the light-transmitting column.

[0021] The advantages of the above technical solution are: by setting a light-transmitting column on the transparent plate, and the light-transmitting column adopting a hollow structure with an open bottom, the purpose of focusing the light source of the indicator light is achieved, making it more convenient for users to observe, with better performance, and a reasonable structural design. Attached Figure Description

[0022] Figure 1 This is an exploded view of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the bottom shell structure of this utility model;

[0024] Figure 3 The cover structure of this utility model is viewed as follows Figure 1 ;

[0025] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the diagram;

[0026] Figure 5 The cover structure of this utility model is viewed as follows Figure 2 ;

[0027] Figure 6 The cover structure of this utility model is viewed as follows Figure 3 ;

[0028] Figure 7 This is a schematic diagram of the transparent plate structure of this utility model;

[0029] Figure 8 This is a schematic diagram of the flexible button structure of this utility model;

[0030] Figure 9 This is a partial structural schematic diagram of the present invention.

[0031] In the diagram: 1-bottom shell, 2-cover shell, 3-first circuit board, 4-second circuit board, 5-third circuit board, 6-terminal block, 7-mounting through-hole, 8-mounting base, 9-first clip, 10-second clip, 11-third clip, 12-vertical base plate, 13-horizontal base plate, 14-positioning protrusion, 15-limiting rib, 16-inclined surface, 17-reinforcing rib, 18-supporting rib, 19-stop block, 20-first easily broken structure, 21-baffle, 22-second easily broken structure, 23-transparent plate, 24-protrusion, 25-welding protrusion, 26-flexible button, 27-groove, 28-first through-hole, 29-second through-hole, 30-light-transmitting column, 31-light-transmitting hole. Detailed Implementation

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0033] Please see Figures 1 to 9As shown, a multi-circuit multi-function meter includes a base shell 1, a cover shell 2, a first circuit board 3, a second circuit board 4, and a third circuit board 5. The base shell 1 and the cover shell 2 are fitted together to form a mounting cavity. The first circuit board 3, the second circuit board 4, and the third circuit board 5 are stacked sequentially from top to bottom within the mounting cavity. The first circuit board 3 is connected to the second circuit board 4, and the second circuit board 4 and the third circuit board 5 are connected and engaged through pin headers and pin headers. Various electronic components can also be installed on the second circuit board 4 and the third circuit board 5 to achieve multi-function functionality. Both the second circuit board 4 and the third circuit board 5 are provided with terminal blocks 6. It should be noted that two terminal blocks 6 are provided on the third circuit board 5. One or two terminal blocks 6 are provided on the 4. The bottom shell 1 and the cover shell 2 are also provided with mounting holes 7. The mounting holes 7 are used to install the corresponding terminal blocks 6. It should be noted that the upper end of the mounting holes 7 on the bottom shell 1 is through. In the above structure, the mounting cavity formed by the snap-fit ​​of the bottom shell 1 and the cover shell 2 provides the necessary space to accommodate the components including the first circuit board 3, the second circuit board 4, and the third circuit board 5 and the electronic components installed on them. The first circuit board 3, the second circuit board 4, and the third circuit board 5 are arranged in order from top to bottom, which effectively utilizes the internal space of the mounting cavity. By setting the second circuit board 4 and the third circuit board 5 with terminal blocks 6, the purpose of more wiring circuits of the energy meter can be achieved, and the function is stronger.

[0034] In this embodiment, plate-shaped mounting seats 8 are integrally formed on both the left and right sides of the bottom of the inner cavity of the bottom shell 1. The upper end of the mounting seat 8 is inserted into the inner cavity of the cover shell 2, and a first locking member 9 is provided on the outer wall of the mounting seat 8. The first locking member 9 is used to lock the cover shell 2. The cover shell 2 is provided with a corresponding locking part. The first locking member 9 can be a locking block, and the locking part can be a locking slot. The bottom shell 1 and the cover shell 2 are locked together by the cooperation of the first locking member 9 and the locking part. The second circuit board 4 is supported and placed on the top of the mounting seat 8, and at least one of the top walls of the mounting seat 8 is also provided with a second locking member 10. More specifically, the top wall of the left mounting seat 8 is provided with the aforementioned second locking member 10. The second locking member 10 is used to lock the second circuit board 4. The second locking member 10 can be an elastic hook. The mounting seat 8 is also positioned relative to the third circuit board 5 on the left and right sides. The mounting base has two side limiters, and at least one mounting base 8 has a third locking element 11 on its inner wall. More specifically, both mounting bases 8 have a third locking element 11 on their inner walls. The third locking element 11 is used to hold the third circuit board 5. The third locking element 11 can also be a locking block. The wiring part of the terminal block 6 is set outside the bottom shell 1 and the cover shell 2. In the above structure, by setting the mounting base 8 with the first locking element 9, the second locking element 10, and the third locking element 11, the locking with the cover shell 2 and the effective position fixation of the second circuit board 4 and the third circuit board 5 can be achieved. The installation of the cover shell 2, the second circuit board 4, and the third circuit board 5 does not require screws, avoiding cumbersome installation steps. The wiring part of the terminal block 6 is also set outside the bottom shell 1 and the cover shell 2, which facilitates wiring. Therefore, the overall structure is reasonably designed and easy to install.

[0035] In this embodiment, the mounting base 8 includes a vertical substrate 12 and a horizontal substrate 13. A first locking member 9, a second locking member 10, and a third locking member 11 are all disposed on the vertical substrate 12. The horizontal substrate 13 is located at the inner front and rear ends of the vertical substrate 12 and mates with the mounting notch on the third circuit board 5. The top of the horizontal substrate 13 is flush with the top of the vertical substrate 12. A positioning protrusion 14 is also provided at the connection between the vertical substrate 12 and the horizontal substrate 13. The positioning protrusion 14 mates with the positioning notch on the second circuit board 4. In this structure, during installation, the mounting notch on the third circuit board 5 is aligned with... The quasi-horizontal substrate 13 and the third circuit board 5 are positioned front-to-back by the cooperation of the horizontal substrate 13 and the mounting notch. At the same time, the vertical substrates 12 on both sides limit the left-to-right position of the third circuit board 5, thus ensuring that the third clip 11 effectively limits the third circuit board 5. The second circuit board 4 is placed on top of the vertical substrate 12 and the horizontal substrate 13. The positioning protrusion 14 and the second clip 10 also effectively limit the second circuit board 4, thus ensuring the relative position of the second circuit board 4 and the third circuit board 5. After installation, there will be no obvious shaking, making it safer and more reliable to use.

[0036] In this embodiment, a pair of limiting ribs 15 are protruding from the front and rear side walls of the inner cavity of the cover shell 2. The lower end of the limiting ribs 15 is inserted into the inner cavity of the bottom shell 1. The limiting ribs 15 interact with the front and rear side walls of the inner cavity of the bottom shell 1. In the above structure, the setting of the limiting ribs 15 will form a contact limit with the inner cavity side wall of the bottom shell 1 after the bottom shell 1 and the cover shell 2 are engaged, thereby making it less likely for the bottom shell 1 and the cover shell 2 to change position, and the fit between the bottom shell 1 and the cover shell 2 is better.

[0037] In this embodiment, the bottom of the outer side of the limiting rib 15 is provided with an inclined surface 16, and the inner side of the limiting rib 15 is also provided with a reinforcing rib 17. In the above structure, the setting of the inclined surface 16 facilitates the smooth insertion of the limiting rib 15 into the inner cavity of the bottom shell 1, and it is not easy to break during the assembly process. The setting of the reinforcing rib 17 makes the limiting rib 15 stronger and safer to use.

[0038] In this embodiment, support ribs 18 are protruding on the front and rear side walls of the inner cavity of the bottom shell 1. The third circuit board 5 is placed on the support ribs 18. In the above structure, by setting the support ribs 18, the third circuit board 18 is provided with support, thereby achieving the purpose of reliable use of the terminal block 6. More specifically, the support ribs 18 can ensure that the upper surface of the placed third circuit board 5 is not lower than the bottom of the mounting opening 7.

[0039] In this embodiment, the terminal block 6 can be composed of a first base and a second base. A first conductive element is provided on the first base, and the first base is fixed by welding through the first conductive element. More specifically, the front end of the first base forms an insertion cavity, and one end of the first conductive element extends into the insertion cavity. The rear end of the second base cooperates with the insertion cavity. A fourth snap-fit ​​element is also provided between the second base and the first base. A second conductive element is also provided inside the second base, and the second conductive element cooperates with the first conductive element. At the same time, the external wire is connected to the second base.

[0040] In this embodiment, two mounting openings 7 are provided on the cover shell 2 and are arranged front and back. A stop block 19 is also provided on one side of the front mounting opening 7. The upper and lower sides of the stop block 19 are provided with first breakable structures 20, which can be designed as breakable ribs. A baffle 21 is provided inside the rear mounting opening 7. The upper and lower sides of the baffle 21 are provided with second breakable structures 22, which can also be designed as breakable ribs. In this structure, by providing the stop block 19 with the first breakable structure 20, the mounting opening 7 on the front side of the cover shell 2 has a filling function, thereby preventing the mounting opening 7 from being partially broken. With ample side space, the block 19 can be disassembled according to customer needs to change the number of reserved positions in the mounting port 7. It should be noted that a network interface 32 can be installed at the mounting port 7. By setting a baffle 21 with a second breakable structure 22, the mounting port on the rear side of the cover 2 can also be filled. During production, the baffle 21 can be disassembled according to customer needs to change the number of terminal blocks 6. Therefore, the setting of the block 19 and the baffle 21 realizes the reserved function and also makes the overall appearance of the product more beautiful and the structural design reasonable.

[0041] In this embodiment, the electricity meter also includes a transparent plate 23. The cover 2 is provided with a display window, and the transparent plate 23 is provided with a protrusion 24. The protrusion 24 is fitted into the display window. The edge of the transparent plate 23 is also provided with a welded rib 25 around the protrusion 24. In the above structure, by setting the transparent plate 23 with the protrusion 24, the display window is covered without affecting the display effect, thereby preventing the intrusion of dust and moisture. The transparent plate 23 is connected to the inner wall of the cover 2 through the welded rib 25. The installation stability of the transparent plate 23 is high, and the surface of the cover 2 has no obvious connection structure, making the appearance more beautiful.

[0042] In this embodiment, the electricity meter also includes a flexible button 26. A transparent plate 23 forms a groove 27 on one side of the protrusion 24. The groove 27 accommodates the flexible button 26 and has a first through hole 28 on its bottom surface. The first through hole 28 corresponds to the pushing part at the lower end of the flexible button 26. The cover 2 also has a second through hole 29 corresponding to the first through hole 28. The pressing part at the upper end of the flexible button 26 protrudes out of the cover 2 through the second through hole 29. In the above structure, the transparent plate 23 and the cover 2 cooperate to clamp and fix the flexible button 26. By setting the groove 27, the flexible button 26 is prevented from shifting or falling off after being pressed multiple times, thus improving the installation reliability of the flexible button 26. At the same time, the first through hole 28 and the second through hole 29 in the groove 27 and on the cover 2 prevent the flexible button 26 from being linked when pressed, making it safer to use.

[0043] In this embodiment, a downwardly extending skirt is provided on the peripheral side wall of the pushing part at the lower end of the flexible button 26. The lower end face of the skirt contacts and engages with the inner wall surface of the groove 27. In the above structure, the skirt and the inner wall surface of the groove 27 contact to form a sealing structure, thereby preventing foreign objects from entering the lower bottom shell 1 through the gap between the first through-hole and the pushing part at the lower end of the flexible button 26.

[0044] In this embodiment, a light-transmitting column 30 is also provided on one side of the protrusion 24 of the transparent plate 23. The light-transmitting column 30 is a hollow structure with an open bottom. A light-transmitting hole 31 is provided on the cover shell 2 corresponding to the light-transmitting column 30. In the above structure, by setting the light-transmitting column 30 on the transparent plate 23 and the light-transmitting column 30 adopting a hollow structure with an open bottom, the purpose of focusing the light source of the indicator light is achieved, making it more convenient for users to observe and improving the usage effect. The structure design is reasonable.

[0045] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A multi-circuit multi-function meter, comprising a bottom shell (1), a cover shell (2), a first circuit board (3), a second circuit board (4), and a third circuit board (5), wherein the bottom shell (1) and the cover shell (2) are fitted together to form a mounting cavity, the first circuit board (3), the second circuit board (4), and the third circuit board (5) are stacked sequentially from top to bottom within the mounting cavity, and both the second circuit board (4) and the third circuit board (5) are provided with terminal blocks (6), and the bottom shell (1) and the cover shell (2) are also provided with mounting openings (7), the mounting openings (7) being used to install the corresponding terminal blocks (6), characterized in that: The bottom of the inner cavity of the bottom shell (1) is integrally formed with plate-shaped mounting seats (8) on both the left and right sides. The upper end of the mounting seat (8) is inserted into the inner cavity of the cover shell (2). The outer wall of the mounting seat (8) is provided with a first clip (9) for clipping the cover shell (2). The second circuit board (4) is supported and placed on the top of the mounting seat (8). At least one of the top walls of the mounting seat (8) is also provided with a second clip (10) for clipping the second circuit board (4). The mounting seat (8) is also positioned relative to the left and right sides of the third circuit board (5). At least one of the inner walls of the mounting seat (8) is also provided with a third clip (11) for clipping the third circuit board (5). The wiring part of the terminal block (6) is located outside the bottom shell (1) and the cover shell (2).

2. The multi-circuit multi-function meter according to claim 1, characterized in that: The mounting base (8) includes a vertical base plate (12) and a horizontal base plate (13). The first clip (9), the second clip (10), and the third clip (11) are all disposed on the vertical base plate (12). The horizontal base plate (13) is disposed at the front and rear ends of the inner side of the vertical base plate (12) and cooperates with the mounting notch on the third circuit board (5). The top of the horizontal base plate (13) is also flush with the top of the vertical base plate (12). A positioning protrusion (14) is also provided at the connection between the vertical base plate (12) and the horizontal base plate (13).

3. A multi-circuit multi-function meter according to claim 1, characterized in that: A pair of limiting ribs (15) are protruding on the front and rear side walls of the inner cavity of the cover shell (2). The lower end of the limiting ribs (15) is inserted into the inner cavity of the bottom shell (1). The limiting ribs (15) interact with the front and rear side walls of the inner cavity of the bottom shell (1).

4. A multi-circuit multi-function meter according to claim 3, characterized in that: The bottom of the outer side of the limiting rib (15) is provided with an inclined surface (16), and the inner side of the limiting rib (15) is also provided with a reinforcing rib (17).

5. A multi-circuit multi-function meter according to claim 1, characterized in that: The inner cavity of the bottom shell (1) has protruding support ribs (18) on the front and rear side walls, and the third circuit board (5) is placed on the support ribs (18).

6. A multi-circuit multi-function meter according to claim 1, characterized in that: The mounting opening (7) is provided on the cover shell (2) in two positions and arranged in front and behind. A stop block (19) is provided on one side of the mounting opening (7) on the front side. A first breakable structure (20) is provided on the upper and lower sides of the stop block (19). A baffle (21) is provided in the mounting opening (7) on the rear side. A second breakable structure (22) is provided on the upper and lower sides of the baffle (21).

7. A multi-circuit multi-function meter according to claim 1, characterized in that: The meter also includes a transparent plate (23), the cover (2) is provided with a display window, the transparent plate (23) is provided with a protrusion (24), the protrusion (24) is fitted and cooperates with the display window, and the edge of the transparent plate (23) is also provided with a welded rib (25) surrounding the protrusion (24).

8. A multi-circuit multi-function meter according to claim 7, characterized in that: The meter also includes a flexible button (26). The transparent plate (23) forms a groove (27) on one side of the protrusion (24). The groove (27) accommodates the flexible button (26) and has a first through hole (28) on its bottom surface. The first through hole (28) corresponds to the pushing part at the lower end of the flexible button (26). The cover (2) also has a second through hole (29) corresponding to the first through hole (28). The pressing part at the upper end of the flexible button (26) protrudes out of the cover (2) through the second through hole (29).

9. A multi-circuit multi-function meter according to claim 7, characterized in that: The transparent plate (23) is provided with a light-transmitting column (30) on one side of the protrusion (24). The light-transmitting column (30) is a hollow structure with an opening at the bottom. The cover (2) is provided with a light-transmitting hole (31) corresponding to the light-transmitting column (30).

Images