An electric meter

Abstract

The present invention relates to an electric meter, comprising a base and a module box arranged on the base, wherein an accommodating space for accommodating the module box is formed at the upper end of the base, and a cover shell is covered at the upper end of the base at a position corresponding to the accommodating space, and the module box is located between the base and the cover shell, and a first chamber is arranged in the module box, and a water outlet for water to flow out of the first chamber is provided on the bottom surface of the first chamber, and a wiring head for connecting an external antenna is arranged on the side wall of the first chamber, and a through hole for the wiring head to pass through is provided at a position corresponding to the wiring head. In this way, when it is necessary to install an external antenna, the external antenna can be connected to the wiring head in the opening without opening the cover shell to realize the connection of the external antenna, so that the connection of the external antenna is more convenient and quick.

Description

Technical Field

[0001] The present invention relates to the technical field of electric meters, and in particular to an electric meter with a communication module. Background Art

[0002] An electric meter is an instrument used to measure electrical energy. It is also called an watt-hour meter, a fire meter, or a kilowatt-hour meter. It refers to an instrument that measures various electrical quantities. At present, electric energy meters are becoming more and more commonly used in industrial production and life due to their small size, high accuracy, good reliability, and easy installation.

[0003] Current electric meters are usually equipped with a carrier module. Specifically, the electric meter is provided with a receiving cavity for installing the carrier module, a module box is provided outside the carrier module, and an opening for installing the antenna is provided on the wall panel of the module box to facilitate subsequent installation of the antenna.

[0004] For example, the Chinese utility model patent "A Single-Phase Intelligent Electric Energy Meter" has a patent number of CN201720745380.0 and a grant announcement number of CN207067205U. The single-phase intelligent electric energy meter includes a bottom box and a PCBA and a G3-PLC communication module installed therein. The bottom box is provided with a module box and an antenna mounting component. The module box and the PCBA are connected as a whole. A notch for installing the antenna component is provided at the side wall of the bottom box corresponding to the module box. The module box is used to install a GPRS communication module. The antenna mounting component is used to position the built-in antenna or to position the connecting line of the external antenna connector. The above-mentioned electric energy meter realizes the subsequent installation of an external antenna. However, during long-term use, water may enter the module box through the notch in the side wall of the bottom box and damage the electrical components of the communication module, which may cause the communication of the electric meter to fail, affect the meter reading and reduce the service life of the electric meter. In addition, during installation, it is necessary to open the cover located at the module to realize the installation of the external antenna, which increases the inconvenience of installation.

[0005] Therefore, it is necessary to further improve the existing electric energy meter. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an electric meter in view of the current status of the above-mentioned prior art, which can directly install an external antenna without opening the cover and conveniently guide water out of the module box.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: an electric meter, including a base and a module box arranged on the base, the upper end of the base is formed with an accommodating space for accommodating the module box, the upper end of the base is covered with a cover shell at a position corresponding to the accommodating space, the module box is located between the base and the cover shell, and is characterized in that: a first chamber is provided in the module box, a water outlet for water to flow out of the first chamber is provided on the bottom surface of the first chamber, a wiring head for connecting an external antenna is provided on the side wall of the first chamber, and the cover shell is provided with a through hole for the wiring head part to pass through at a position corresponding to the wiring head.

[0008] In an improved embodiment, a second chamber is provided in the module box, a first circuit board connected to the terminal block is provided in the second chamber, and the bottom surface of the first chamber is located below the bottom surface of the second chamber. The existence of the second chamber and the bottom surface of the second chamber being located above the bottom surface of the first chamber make it difficult for water that penetrates through the through hole to enter the first chamber and then enter the second chamber, thereby preventing water from contacting the first circuit board and electrical components in the second chamber.

[0009] There are many ways to arrange the first chamber and the second chamber, which can be arranged left and right or front and back. Preferably, the first chamber and the second chamber are arranged left and right, and a partition extending front and back is provided therebetween, and the partition is provided with a through hole for the connecting wire of the terminal head to pass through.

[0010] In order to facilitate the installation of the wiring head, the module box includes a lower box body and a box cover arranged on the lower box body, and the lower box body and the box cover are provided with corresponding half-open holes on the joint surface corresponding to the front wall plate of the first chamber. When the box cover and the lower box body are in a closed state, the half-open holes of the lower box body and the box cover are combined to form an opening for the front end of the wiring head to pass through.

[0011] In order to limit the connection head, a convex plate extending up and down is arranged in the first chamber, and the convex plate is parallel to the front wall plate of the first chamber, and the convex plate is provided with an avoidance opening for avoiding the rear end of the connection head at the position corresponding to the opening, and an interlayer for limiting the connection head part therein is formed between the convex plate and the front wall plate of the first chamber.

[0012] Preferably, the convex plate includes a first convex plate and a second convex plate, the first convex plate is arranged on the bottom wall of the lower box body and extends upward, the second convex plate is arranged on the top wall of the box cover and extends downward, the first convex plate and the second convex plate are correspondingly provided with semicircular holes, when the box cover and the lower box body are in a closed state, the first convex plate and the second convex plate are connected to each other, and the semicircular holes of the first convex plate and the second convex plate are combined to form the avoidance opening.

[0013] In order to limit the up and down movement of the terminal head and maintain the stability of the terminal head after installation, a downward extending pressure plate is arranged in the interlayer of the box cover. When the box cover is covered on the lower box body, the pressure plate partially abuts against the terminal head.

[0014] In order to prevent the module box from shaking in the accommodating space, a positioning plate is extended from the inner side of the top wall plate of the cover shell toward the box cover. When the cover shell is covered on the base, the positioning plate abuts against the top wall of the box cover.

[0015] There are many ways to connect the box cover and the lower box body. From the perspective of convenient disassembly and assembly, preferably, the outer wall of the box cover is provided with at least three buckle holes, and correspondingly, the lower box body is provided with a snap-in portion that can be snapped into the corresponding buckle hole, and the lower box body is connected to the box cover through the cooperation of the snap-in portion and the buckle hole.

[0016] Preferably, a cover is provided on the base, the cover is located below the cover shell, and a second circuit board is provided in the space between the cover and the base, the first circuit board is connected to the second circuit board through a connector, and an opening is provided on the bottom wall of the second chamber to avoid the connector.

[0017] Further preferably, the rear wall plate of the base extends forward to form a support plate, the top plate of the cover and the support plate are connected to each other and an opening for the connector to pass through is formed between the joint surfaces of the two, and the above-mentioned accommodating space is formed between the support plate, the top plate of the cover and the rear wall plate of the base, and a gap connected to the water outlet is formed between the bottom wall of the module box and the support plate and the top plate of the cover.

[0018] In order to facilitate the water flowing out of the water outlet to the outside of the watch, the lower end of the cover shell facing the accommodating space has a convex rib extending along its circumference, and correspondingly, the surface of the watch cover facing the cover shell has a groove for accommodating the convex rib. When the cover shell is in a state of covering the base, there is a gap between the cover shell and the watch cover at a position adjacent to the groove that is connected to the gap and the outside world.

[0019] In order to conveniently accommodate water that penetrates through the cover shell and the rear wall plate of the base, the rear wall surface of the base is recessed forward to form a recessed area, and the front plate of the recessed area extends upward to form an extension plate, and the extension plate is located on the front side of the rear wall plate of the base, and a water trough is formed between the extension plate and the rear wall plate of the base to accommodate water that penetrates through the top gap between the cover shell and the rear wall plate of the base.

[0020] Compared with the prior art, the cover of the electric meter of the present invention is provided with a through hole for the wiring head part to pass through at the position corresponding to the wiring head. In this way, when the external antenna needs to be installed, the external antenna can be connected to the wiring head in the opening without opening the cover, thereby realizing the connection of the external antenna, making the connection of the external antenna more convenient and quick, the whole structure is reasonable, and the time for connecting the external antenna is saved; when water penetrates into the first chamber through the through hole, it will flow out of the module box through the water outlet to prevent water from accumulating in the first chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of some structures;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure from another angle;

[0024] Figure 4 for Figure 2 Schematic diagram of some structures;

[0025] Figure 5 for Figure 1 Schematic diagram of the three-dimensional decomposition structure;

[0026] Figure 6 for Figure 1 A cross-sectional view of a part of the structure;

[0027] Figure 7 for Figure 1 A cross-sectional view of a partial structure at another angle;

[0028] Figure 8 for Figure 2 A cross-sectional view of a part of the structure;

[0029] Fig. 9 It is a schematic diagram of the structure of the module box with an external antenna;

[0030] Fig.10 It is a structural schematic diagram of a box cover of a module box;

[0031] Fig.11 It is a structural schematic diagram of the module box;

[0032] Fig.12 It is a structural schematic diagram of the lower box body of the module box;

[0033] Fig.13 for Figure 2 Schematic diagram of some structures;

[0034] Fig.14for Figure 4 Cross-sectional view of part of the structure. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to the accompanying drawings.

[0036] like Figures 1 to 14 As shown, the electric meter according to the embodiment of the present invention comprises a base 1 , a cover 3 , a meter cover 6 and a module box 2 arranged on the base 1 .

[0037] like Figure 2 and Figure 4 As shown, the upper end of the rear wall plate 11 of the base 1 extends forward to form a support plate 13, the cover 6 is arranged on the base 1 and is located below the cover 3, and an accommodating space 1a for accommodating the module box 2 is formed between the support plate 13, the top plate 61 of the cover 6 and the bottom wall of the base 1. Specifically, the top plate 61 of the cover 6 is in contact with the support plate 13, as shown in FIG. Figure 1 , Figure 6 , Figure 7 and Fig.13 As shown, the upper end of the base 1 is covered with a cover 3 at the position corresponding to the accommodating space 1a, and the module box 2 is located between the base 1 and the cover 3; and a positioning plate 33 is extended from the inner side of the top wall plate of the cover 3 toward the box cover 2b of the module box 2, see Figure 6 As shown, when the cover shell 3 is covered on the base 1, the positioning plate 33 abuts against the top wall of the box cover 2b, thereby preventing the module box from shaking in the accommodating space.

[0038] like Figure 1 As shown, a second circuit board 7 is disposed in the space between the cover 6 and the base 1, and the first circuit board 213 is connected to the second circuit board 7 via a connector 8, as shown in FIG. Fig.12 As shown, the bottom wall of the second chamber 22 is provided with an opening 221 for avoiding the connector 8, and the top plate 61 of the cover 6 is connected to the support plate 13 and an opening 62 for the connector 8 to pass through is formed between the joint surfaces of the top plate 61 and the support plate 13. For details, see Fig.13 As shown, the connector 8 passes through the opening 211 and the mouth 62 and is connected to the second circuit board 7, see Fig.14 As shown, the connector 8 is generally a pin-and-pin header, one end of the connector 8 is connected to the first circuit board 213 , and the other end is connected to the second circuit board 7 .

[0039] In order to prevent water from penetrating into the module box through the gap between the rear wall of the base 1 and the cover 3, Figure 3As shown, the rear wall of the base 1 is recessed forward to form a recessed area 1b, and the front plate of the recessed area 1b extends upward to form an extension plate 12, which is located at the front side of the rear wall plate 11 of the base, and a water tank 1c is formed between the extension plate 12 and the rear wall plate 11 of the base to accommodate water that penetrates through the top gap between the cover shell 3 and the rear wall plate 11 of the base. For details, see Figures 3 to 7 In addition, the middle of the top of the rear wall plate 11 of the base is recessed inward to form a recessed area 1d for placing the hook, and the recessed area divides the water tank 1c into two small water tanks, see Fig.13 shown.

[0040] like Figures 4 to 12 As shown, the module box 2 is provided with a first chamber 21 and a second chamber 22 from left to right, and a partition 23 extending forward and backward is provided between the first chamber 21 and the second chamber 22. Figure 2 , Figure 4 and Figure 6 As shown, the front wall of the first chamber 21 is provided with a connection head 4 for connecting the external antenna 5, wherein there are two connection heads 4, each of which is threadedly connected to the connection head of the corresponding external antenna 5, and the cover 3 is provided with a through hole 31 for the connection head 4 to partially pass through at the position corresponding to the connection head 4. Figure 4 and Figure 8 As shown, the second chamber 22 in the module box 2 is provided with a first circuit board 213 connected to the terminal block, and the partition plate 23 is provided with a through hole 231 for the connecting wire of the terminal block 4 to pass through. The connecting wire of the terminal block 4 passes through the through hole 231 and is connected to the first circuit board 213. For details, see Figure 4 , Fig. 9 and Fig.12 In this way, the external antenna 5 can be directly threadedly connected to the wiring head 4 exposed outside the through hole 31 without opening the cover 3.

[0041] like Figure 2 , Figure 4 , Fig. 9 and Fig.11 As shown, the bottom surface of the first chamber 21 is located below the bottom surface of the second chamber 22, and a water outlet 21a for water to flow out of the first chamber 21 is provided on the bottom wall of the first chamber 21. Figure 8 and Fig.12 The bottom wall of the module box 2 and the support plate 13 and the top plate 61 of the table cover are formed with a gap 63 connected to the water outlet 21a; in addition, as Figure 7As shown, the lower end of the side of the cover shell 3 facing the accommodating space 1a has a convex rib 33a extending along its circumferential direction. Correspondingly, the surface of the cover 6 facing the cover shell 3 has a groove 611 for accommodating the convex rib 33a. When the cover shell 3 is in a state of covering the base 1, there is a gap 34 between the cover shell 3 and the cover 6 at a position adjacent to the groove 611, which is connected to the gap 63 and the outside. In this way, when water finally penetrates into the first chamber 21 through the through hole 31, the water accumulated in the first chamber 21 will flow out through the water outlet 21a, the gap 63 and the gap 34 in turn, preventing water from accumulating in the first chamber 21 and preventing water from contacting the first circuit board 213 in the second chamber 22. In addition, as Figure 2 , Figure 3 , Figures 5 to 7 As shown, the module box 2 includes a lower box body 2a and a box cover 2b arranged on the lower box body 2a. The outer peripheral wall of the box cover 2b is provided with at least three buckle holes 25. Correspondingly, a snap-in portion 24 that can be snapped into the corresponding buckle hole 25 is provided on the lower box body 2a. The lower box body 2a is connected to the box cover 2b through the cooperation of the snap-in portion 24 and the corresponding buckle hole 25. For details, see Figures 9 to 12 In order to facilitate the installation of the wiring head, the lower box body 2a and the box cover 2b are provided with a corresponding half-open hole 21d on the joint surface of the corresponding front wall plate of the first chamber 21. When the box cover 2b and the lower box body 2a are in the closed state, the half-open hole 21d of the lower box body 2a and the half-open hole 21d of the box cover 2b are combined to form an opening 21c for the front end of the wiring head 4 to pass through. For details, see Fig.11 shown.

[0042] In order to limit the forward and backward movement of the terminal head, Figure 7 As shown, a convex plate 211 extending up and down is provided in the first chamber 21, the convex plate 211 is parallel to the front wall plate of the first chamber 21, and the convex plate 211 is provided with an escape opening 211c for evading the rear end of the wiring head 4 at the position corresponding to the opening 21c, see Figure 6 As shown, a sandwich 212 is formed between the convex plate 211 and the front wall of the first chamber 21 to limit the connection head 4 part therein. In order to limit the up and down movement of the connection head and maintain the stability of the connection head after installation, as shown in FIG. Figure 7 and Fig.10 As shown, a downwardly extending pressing plate 215 is arranged in the interlayer of the box cover 2b, and when the box cover 2b is covered on the lower box body 2a, the pressing plate 215 partially abuts against the terminal head 4. In this embodiment, there are two pressing plates 215 arranged at intervals on the left and right for each terminal head 4.

[0043] like Figure 7As shown, the convex plate 211 includes a first convex plate 211a and a second convex plate 211b. The first convex plate 211a is arranged on the bottom wall of the lower box body 2a and extends upward, and the second convex plate 211b is arranged on the top wall of the box cover 2b and extends downward. The first convex plate 211a and the second convex plate 211b are correspondingly provided with semicircular holes 2111. When the box cover 2b and the lower box body 2a are in the closed state, the first convex plate 211a and the second convex plate 211b are in contact with each other, and the semicircular holes 2111 of the first convex plate 211a and the second convex plate 211b are combined to form the above-mentioned avoidance opening 211c. For details, see Figure 6 shown.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric meter, comprising a base (1) and a module box (2) arranged on the base (1), wherein an accommodating space (1a) for accommodating the module box (2) is formed at the upper end of the base (1), and a cover (3) is covered at the upper end of the base (1) at a position corresponding to the accommodating space (1a), and the module box (2) is located between the base (1) and the cover (3), characterized in that: The module box (2) is provided with a first chamber (21), the bottom surface of the first chamber (21) is provided with a water outlet (21a) for water to flow out of the first chamber (21), the side wall of the first chamber (21) is provided with a wiring head (4) for connecting an external antenna (5), and the cover (3) is provided with a through hole (31) for the wiring head (4) to partially pass through at a position corresponding to the wiring head (4); The module box (2) is provided with a second chamber (22), the second chamber (22) is provided with a first circuit board (213) connected to the terminal head (4), and the bottom surface of the first chamber (21) is located below the bottom surface of the second chamber (22); The first chamber (21) and the second chamber (22) are arranged on the left and right, and a partition (23) extending forward and backward is provided between the two. The partition (23) is provided with a through hole (231) for the connecting wire of the terminal (4) to pass through. The module box (2) comprises a lower box body (2a) and a box cover (2b) arranged on the lower box body (2a); the lower box body (2a) and the box cover (2b) are provided with corresponding semi-open holes (21d) on the joint surfaces corresponding to the front wall plates of the first chamber (21); when the box cover (2b) and the lower box body (2a) are in a closed state, the semi-open holes (21d) of the lower box body (2a) and the box cover (2b) are combined to form an opening (21c) for the front end of the wiring head (4) to pass through; A convex plate (211) extending up and down is arranged in the first chamber (21), the convex plate (211) is parallel to the front wall plate of the first chamber (21), and the convex plate (211) is provided with an escape opening (211c) for evading the rear end of the wiring head (4) at a position corresponding to the opening (21c), and an interlayer (212) for partially limiting the wiring head (4) therein is formed between the convex plate (211) and the front wall plate of the first chamber (21); The convex plate (211) comprises a first convex plate (211a) and a second convex plate (211b); the first convex plate (211a) is arranged on the bottom wall of the lower box body (2a) and extends upward; the second convex plate (211b) is arranged on the top wall of the box cover (2b) and extends downward; the first convex plate (211a) and the second convex plate (211b) are respectively provided with semicircular holes (2111); when the box cover (2b) and the lower box body (2a) are in a closed state, the first convex plate (211a) and the second convex plate (211b) are in contact with each other, and the semicircular holes (2111) of the first convex plate (211a) and the second convex plate (211b) are combined to form the avoidance opening (211c).

2. The electric meter according to claim 1, characterized in that: A downwardly extending pressing plate (215) is arranged in the interlayer (212) of the box cover (2b); when the box cover (2b) is covered on the lower box body (2a), the pressing plate (215) partially abuts against the terminal head (4).

3. The electric meter according to claim 1, characterized in that: A positioning plate (33) is extended from the inner side of the top wall plate of the cover shell (3) toward the box cover (2b); when the cover shell (3) is covered on the base (1), the positioning plate (33) abuts against the top wall of the box cover (2b).

4. The electric meter according to claim 1, characterized in that: The outer peripheral wall of the box cover (2b) is provided with at least three buckle holes (25), and correspondingly, the lower box body (2a) is provided with a snap-in portion (24) that can be snapped into the corresponding buckle holes (25), and the lower box body (2a) is connected to the box cover (2b) through the cooperation between the snap-in portion (24) and the buckle holes (25).

5. The electric meter according to any one of claims 1 to 4, characterized in that: The base (1) is provided with a cover (6), the cover (6) is located below the cover shell (3), and a second circuit board (7) is provided in the space between the cover (6) and the base (1), the first circuit board (213) is connected to the second circuit board (7) via a connector (8), and an opening (221) is provided on the bottom wall of the second chamber (22) to avoid the connector (8).

6. The electric meter according to claim 5, characterized in that: The rear wall plate (11) of the base (1) extends forward to form a support plate (13); the top plate (61) of the cover (6) and the support plate (13) are connected to each other and an opening (62) for the connector (8) to pass through is formed between the joint surfaces of the two; the above-mentioned accommodation space (1a) is formed between the support plate (13), the top plate (61) of the cover (6) and the rear wall plate of the base (1); and a gap (63) connected to the water outlet (21a) is formed between the bottom wall of the module box (2) and the support plate (13) and the top plate (61) of the cover.

7. The electric meter according to claim 6, characterized in that: The lower end of one side of the cover shell (3) facing the accommodating space (1a) has a convex rib (33a) extending along its circumferential direction. Correspondingly, the surface of the cover (6) facing the cover shell (3) has a groove (611) for accommodating the convex rib (33a). When the cover shell (3) is in a state of covering the base (1), a gap (34) is provided between the cover shell (3) and the cover (6) at a position adjacent to the groove (611), which is connected to the gap (63) and the outside world.

8. The electric meter according to claim 6, characterized in that: The rear wall of the base (1) is recessed forward to form a recessed area (1b); the front plate of the recessed area (1b) extends upward to form an extension plate (12); the extension plate (12) is located at the front side of the rear wall plate (11) of the base; and a water trough (1c) is formed between the extension plate (12) and the rear wall plate (11) of the base to accommodate water that penetrates through the top gap between the cover shell (3) and the rear wall plate (11) of the base.

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