CN110672893A

CN110672893A - Electric energy meter with communication module

Info

Publication number: CN110672893A
Application number: CN201910889479.1A
Authority: CN
Inventors: 唐健; 林国庆; 魏章波
Original assignee: Ningbo Sanxing Medical and Electric Co Ltd
Current assignee: Ningbo Sanxing Electric Co Ltd; Ningbo Sanxing Medical and Electric Co Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-01-10

Abstract

The invention relates to an electric energy meter with a communication module, which comprises a base and the communication module arranged on the base, wherein the base is covered with a cover shell at a position corresponding to the communication module, the communication module is positioned between the base and the cover shell, and the electric energy meter is characterized in that: the communication module is provided with a connector lug used for connecting an external antenna, and the housing is provided with an opening for the connector lug to partially penetrate out at a position corresponding to the connector lug. Compared with the prior art, the invention has the advantages that: the external antenna can be connected without opening the housing; form sealing connection through the sealing member between housing and the communication module, prevent that water, dust etc. from contacting communication module in along infiltration to the housing in the trompil, improved communication module's life.

Description

Electric energy meter with communication module

Technical Field

The invention relates to the technical field of electric energy meters, in particular to an electric energy meter with a communication module.

Background

An electric energy meter is an instrument for measuring electric energy, also called watt-hour meter, fire meter, kilowatt hour meter, and is an instrument for measuring various electric quantities.

The carrier module is usually arranged in the existing electric energy meter, specifically, the electric energy meter is provided with a holding cavity for mounting the carrier module, a module box is arranged outside the carrier module, and an opening for mounting an antenna is arranged on a wall plate of the module box of the module, so that the antenna can be conveniently mounted in the subsequent process. For example, the Chinese utility model patent with patent number CN201720745380.0 (publication number CN207067205U) is a single-phase intelligent electric energy meter, the single-phase intelligent electric energy meter comprises a bottom box, a PCBA and a G3-PLC communication module which are arranged in the bottom box, wherein a module box and an antenna installation component are arranged in the bottom box, the module box and the PCBA are connected into a whole, a notch for installing the antenna component is formed in the side wall of the bottom box corresponding to the module box, the module box is used for installing the GPRS communication module, the antenna installation component is used for positioning an internal antenna or positioning a connecting wire of an external antenna connector, the electric energy meter realizes the subsequent installation of the external antenna, but in the process of long-term use, it may occur that water enters the inside of the module case through the notches in the side walls of the bottom case and damages the electrical components of the telecommunications module, further, the communication of the electric meter is possibly broken down, the meter reading is influenced, and the service life of the electric meter is reduced; in addition, during installation, the installation of the external antenna can be realized only by opening the housing positioned at the module, so that the inconvenience of installation is increased.

Therefore, further improvements to existing electric energy meters are needed.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide an electric energy meter with a communication module, which can directly install an external antenna without opening a cover, in view of the current situation of the prior art.

A second technical problem to be solved by the present invention is to provide an electric energy meter that prevents water from penetrating through the connection point of the external antenna and contacting the communication module, in view of the above-mentioned current state of the art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: an electric energy meter with a communication module, includes base and the communication module who sets up on the base, the base covers the housing in the position that corresponds communication module, communication module is located between base and the housing, its characterized in that: the communication module is provided with a connector lug used for connecting an external antenna, and the housing is provided with an opening for the connector lug to partially penetrate out at a position corresponding to the connector lug.

Preferably, the opening is a flat circular hole avoiding at least two external antennas.

The technical scheme adopted by the invention for solving the second technical problem is as follows: and when the cover shell is covered on the base, the cover shell and the communication module form sealing connection through a sealing piece, and the sealing piece is positioned outside the opening hole.

The seal can be arranged on the back of the housing or on a front wall of the communication module, preferably the seal is a sealing ring arranged on the back of the housing.

In order to facilitate installation of the sealing ring, the back of the cover shell is provided with a first annular flange and a second annular flange which extend towards the communication module direction and are sequentially arranged from inside to outside at intervals, and the sealing ring is positioned between the first annular flange and the second annular flange.

In order to further prevent water from penetrating through the edge of the opening to contact the communication module, the first annular flange is formed by extending the inner peripheral wall of the opening towards the direction of the communication module, and the rear wall surface of the first annular flange is abutted against the front wall surface of the communication module in the state that the housing is covered on the base.

Preferably, the communication module comprises a module box and a first circuit board arranged in the module box, a through hole for allowing one end of the connector to penetrate is formed in the module box, the through hole is arranged opposite to the through hole, and a plug-in capable of being plugged in the first circuit board is arranged at the other end of the connector. The arrangement of the through holes facilitates the connection of the connector lug and the first circuit board.

In order to make the structure of the whole electric energy meter more compact, the module box is arranged at the upper end of the base, the module box comprises a lower box body and an upper box cover arranged on the lower box body, an installation cavity for accommodating a first circuit board is formed between the lower box body and the upper box cover in a surrounding mode, and the through hole is formed in a front wall plate of the upper box cover.

In order to facilitate the installation of the upper box cover and the lower box body, the peripheral wall of the upper box cover is provided with at least three convex plates extending downwards, buckling holes are formed in the convex plates, correspondingly, clamping parts capable of being clamped into the corresponding buckling holes are arranged on the lower box body, and the lower box body is connected with the upper box cover through the matching of the clamping parts and the buckling holes. The clamping connection of the upper box cover and the lower box body is more convenient.

Preferably, be provided with the table lid on the base, the table lid is located the below of housing, just be provided with the second circuit board in the space between table lid and the base, set up on the diapire of lower box body and dodge the mouth of dodging of connector, first circuit board pass through the connector with the second circuit board is connected. The arrangement mode of the meter cover, the housing, the first circuit board and the second circuit board improves the structural compactness of the electric energy meter and facilitates the connection of the first circuit board and the second circuit board.

The top plate of the meter cover is in butt joint with the support plate, a mouth for the connector to pass through is formed between joint surfaces of the top plate and the support plate, the top plate of the meter cover and the rear wall plate of the base are provided with the accommodating cavity for accommodating the module box.

In order to prevent the module box from shaking in the accommodating cavity and generating a gap with the housing, a limiting rib extends backwards on a rear plate of the module box, and the rear end face of the limiting rib abuts against a rear wall plate of the accommodating cavity when the module box is in an installed state. The module box is prevented from shaking in the accommodating cavity, so that a gap is prevented from being generated between the module box and the housing at the position of the opening, and water is prevented from permeating through the opening and contacting the module box; furthermore, the presence of the spacing ribs increases the strength of the cartridge. Preferably, the limiting ribs extend up and down and are arranged on the rear plate of the upper box cover, and at least two limiting ribs are arranged at left and right intervals.

Compared with the prior art, the connector lug for connecting the external antenna is arranged on the communication module in the electric energy meter with the communication module, and the position of the housing corresponding to the connector lug is provided with the opening through which the connector lug partially penetrates out; be provided with the sealing member outside lieing in the trompil between housing and the communication module, form sealing connection through the sealing member between housing and the communication module, prevent that edge infiltration to the housing in through the trompil such as water, dust from contacting the communication module, improved communication module's life.

Drawings

Fig. 1 is a schematic structural view of an external antenna according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the antenna shown in FIG. 1 with the external antenna removed;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a cross-sectional view at another angle of FIG. 1;

FIG. 6 is an enlarged view of the portion B of FIG. 5;

FIG. 7 is a schematic perspective exploded view of FIG. 1;

FIG. 8 is a schematic perspective exploded view of a portion of the structure of an embodiment of the present invention;

FIG. 9 is a schematic perspective exploded view of a portion of the structure of FIG. 8;

FIG. 10 is a schematic view of the structure of FIG. 9 at another angle;

FIG. 11 is a schematic perspective exploded view of a portion of the structure of FIG. 8 from another angle;

FIG. 12 is a cross-sectional view at another angle of FIG. 1;

FIG. 13 is a schematic view of a portion of the structure of FIG. 1;

FIG. 14 is a cross-sectional view of a portion of the structure of FIG. 2;

fig. 15 is a schematic structural diagram of another external antenna according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 15, the electric energy meter with the communication module 2 according to the embodiment of the present invention includes a base 1, the communication module 2 disposed on the base 1, a housing 3, and a meter cover 7.

As shown in fig. 7 and 13, the communication module 2 is disposed at the upper end of the base 1, the upper end of the rear wall 111 of the base 1 extends forward to form a support plate 13 for supporting the communication module 2, as shown in fig. 1, the cover 7 is disposed on the base 1 and below the housing 3, as shown in fig. 4 and 5, the top plate 71 of the cover 7 is abutted against the support plate 13, and an accommodating cavity 1a for accommodating the module case 21 is formed between the support plate 13, the top plate 71 of the cover 7 and the rear wall 111 of the base 1. And the base 1 is covered with a cover 3 at a position corresponding to the communication module 2, the communication module 2 being located between the base 1 and the cover 3. As shown in fig. 4, the front portion of the communication module 2 is provided with a connector 4 for connecting an external antenna 6, and the external antenna 6 has two forms, specifically, see fig. 1 and fig. 15. In addition, the lower end of one surface of the cover 3 facing the accommodating cavity 1a is provided with a rib 35 extending along the circumferential direction thereof, correspondingly, the surface of the watch cover 7 facing the cover 3 is provided with a groove 711 for accommodating the rib 35, and the rib 35 is limited in the groove 711 in a state that the cover 3 is covered on the base 1, as shown in fig. 5. As shown in fig. 1 and 7, the housing 3 is provided with an opening 31 corresponding to the connector lug 4 for avoiding the external antenna 6, and the connector lug 4 partially penetrates through the opening 31. Specifically, as shown in fig. 8 to 10, the communication module 2 includes a module case 21 and a first circuit board 22 disposed in the module case 21, a front wall of the module case 21 is provided with two through holes 21a through which the front end portions of the terminals 4 are inserted, the two through holes 21a are disposed side by side, the two through holes 21a are disposed opposite to the opening hole 31, and the opening hole 31 is a flat circular hole that is at least recessed from two external antennas 6. The rear end of the connector lug 4 has a plug-in 41 which can be plugged onto the first circuit board 22, as shown in particular in fig. 8. The first circuit board 22 extends in the front-back direction and is parallel to the top surface of the upper box cover 212, so that the plug-in 41 is L-shaped, and when the communication module 2 is in the mounted state, the portion of the connector 4 near the front end is located above the first circuit board 22.

As shown in fig. 5 to 11, the module box 21 includes a lower box body 211 and an upper box cover 212 covering the lower box body 211, as shown in fig. 6, a mounting cavity 21b for accommodating the first circuit board 22 is enclosed between the lower box body 211 and the upper box cover 212, and the through hole 21a is opened on a front wall plate of the upper box cover 212, as shown in fig. 9. In addition, the upper box cover 212 and the lower box body 211 are connected by a snap structure, specifically, as shown in fig. 8 to 11, at least three downwardly extending convex plates 213 are provided on the outer peripheral wall of the upper box cover 212, in this embodiment, there are four convex plates 213, each convex plate 213 is provided with a fastening hole 2131, correspondingly, the lower box body 211 is provided with a snapping portion 2111 capable of snapping into the corresponding fastening hole 2131, the lower box body 211 is connected with the upper box cover 212 by the matching of the snapping portion 2111 and the corresponding fastening hole 2131, and the snapping portion 2111 and the fastening hole 2131 form the snap structure. In addition, as shown in fig. 12, the inner side of the front wall plate of the upper box cover 212 has positioning ribs 2123 extending downward and arranged in pairs at intervals left and right, and in a state where the upper box cover is disposed in the lower box body, the plug-in 41 of the connector lug 4 is located between two adjacent positioning ribs 2123, so that the connector lug 4 is prevented from moving left and right, and the strength of the front wall plate of the upper box cover is increased.

In addition, as shown in fig. 6 and 7, a limiting rib 2121 extends backwards from the back plate of the upper case cover 212 of the module case 21, the limiting rib 2121 extends upwards and downwards, and at least two limiting ribs 2121 are arranged on the back plate of the upper case cover 212 at intervals from left to right. And when the module box 21 is in the mounted state, the rear end surface of the limiting rib 2121 abuts against the rear wall plate 111 of the accommodating cavity 1a, as shown in fig. 6.

As shown in fig. 5, a second circuit board 8 is disposed in the space between the cover 7 and the base 1, the second circuit board 8 is connected to the first circuit board 22 through a connector 9, specifically, an avoiding opening 2112 avoiding the connector 9 is disposed on the bottom wall of the lower box 211, specifically, as shown in fig. 11, a mouth portion 72 for the connector 9 to pass through is formed on the joint surface of the top plate 71 of the cover 7 and the support plate 13, and the connector 9 passes through the opening 211 and the mouth portion 62 and then is connected to the second circuit board 7, specifically, as shown in fig. 14, wherein the connector 9 is a pin header, one end of the connector 9 is connected to the first circuit board 22, and the other end of the connector 9 is connected to the second circuit board 8, so that the first circuit board 22 is connected to the second circuit board 8 through the connector 9.

As shown in fig. 3, 4, and 8, in a state where the cover 3 is placed on the base 1, the cover 3 and the communication module 2 are sealingly connected by a sealing member, and the sealing member is located outside the opening 31. As shown in fig. 8, the back of the cover 3 has a first annular flange 32 and a second annular flange 33 which extend toward the communication module 2 and are sequentially spaced from each other from inside to outside, the first annular flange 32 is formed by extending the inner peripheral wall of the opening 31 toward the communication module 2, and the rear wall surface of the first annular flange 32 partially abuts against the front wall surface 20 of the module case of the communication module 2 in a state where the cover 3 is covered on the base 1, as shown in fig. 4; the sealing element is a sealing ring 5 arranged between a first annular flange 32 and a second annular flange 33 on the back of the housing 3, and the existence of the sealing ring 5 realizes the sealing connection between the housing 3 and the communication module 2, thereby preventing water, dust and the like from penetrating into the housing 3 through the inner peripheral edge of the opening 31 to contact with an electric element in the communication module, and further influencing the service life of the electric element.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An electric energy meter with a communication module, comprising a base (1) and a communication module (2) arranged on the base (1), wherein the base (1) is covered with a cover (3) at a position corresponding to the communication module (2), the communication module (2) is arranged between the base (1) and the cover (3), and the electric energy meter is characterized in that: the communication module (2) is provided with a connector lug (4) used for connecting an external antenna (6), and the housing (3) is provided with an opening (31) for the connector lug (4) to partially penetrate out at a position corresponding to the connector lug (4).

2. The electric energy meter of claim 1, wherein: the open hole (31) is an oblate hole which at least avoids two external antennas (6).

3. An electric energy meter according to claim 1 or 2, characterized in that: and when the cover shell (3) is arranged on the base (1) in a covering manner, the cover shell (3) and the communication module (2) are in sealed connection through a sealing element, and the sealing element is positioned outside the opening (31).

4. An electric energy meter according to claim 3, characterized in that: the sealing element is a sealing ring (5) arranged on the back of the cover shell (3).

5. The electric energy meter of claim 4, wherein: the back of the cover shell (3) is provided with a first annular flange (32) and a second annular flange (33) which extend towards the direction of the communication module (2) and are sequentially arranged from inside to outside at intervals, and the sealing ring (5) is positioned between the first annular flange (32) and the second annular flange (33).

6. The electric energy meter of claim 5, wherein: the first annular flange (32) is formed by extending the inner peripheral wall of the opening (31) towards the communication module (2), and the rear wall surface of the first annular flange (32) partially abuts against the front wall surface (20) of the communication module (2) when the cover (3) is covered on the base (1).

7. An electric energy meter according to any one of claims 1 to 6, characterized in that: the communication module (2) comprises a module box (21) and a first circuit board (22) arranged in the module box (21), wherein a through hole (21a) for allowing one end part of the wire connector (4) to penetrate through is formed in the module box (21), the through hole (21a) is arranged opposite to the open hole (31), and a plug-in unit (41) capable of being plugged on the first circuit board (22) is arranged at the other end of the wire connector (4).

8. The electric energy meter of claim 7, wherein: the module box (21) is arranged at the upper end of the base (1), the module box (21) comprises a lower box body (211) and an upper box cover (212) arranged on the lower box body (211), an installation cavity (21b) for accommodating a first circuit board (22) is formed between the lower box body (211) and the upper box cover (212) in a surrounding mode, and the through hole (21a) is formed in a front wall plate of the upper box cover (212).

9. The electric energy meter of claim 8, wherein: the outer peripheral wall of the upper box cover (212) is provided with at least three convex plates (213) extending downwards, buckling holes (2131) are formed in the convex plates (213), correspondingly, clamping-in portions (2111) capable of being clamped into the corresponding buckling holes (2131) are arranged on the lower box body (211), and the lower box body (211) is connected with the upper box cover (212) through the matching of the clamping-in portions (2111) and the buckling holes (2131).

10. The electric energy meter of claim 8, wherein: be provided with table lid (7) on base (1), table lid (7) are located the below of housing (3), just be provided with second circuit board (8) in the space between table lid (7) and base (1), set up on the diapire of lower box body (211) and dodge mouth (2112) of dodging connector (9), first circuit board (22) through connector (9) with second circuit board (8) are connected.

11. The electrical energy meter of claim 9, wherein: the upper end of the base (1) extends forwards to form a supporting plate (13), a top plate (71) of the meter cover (7) is in butt joint with the supporting plate (13), a mouth (72) for the connector (9) to penetrate through is formed between joint surfaces of the top plate and the supporting plate, and an accommodating cavity (1a) for accommodating the module box (21) is formed among the supporting plate (13), the top plate (71) of the meter cover (7) and a rear wall plate (111) of the base (1).

12. The electrical energy meter of claim 11, wherein: a limiting rib (2121) extends backwards from the rear plate of the module box (21), and the rear end face of the limiting rib (2121) abuts against a rear wall plate (111) of the accommodating cavity (1a) when the module box (21) is in an installed state.

13. The electrical energy meter of claim 12, wherein: the limiting ribs (2121) extend up and down and are arranged on the rear plate of the upper box cover (212), and at least two limiting ribs (2121) are arranged at left and right intervals.