CN113075437B - High-reliability intelligent electric meter - Google Patents
High-reliability intelligent electric meter Download PDFInfo
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- CN113075437B CN113075437B CN202110374929.0A CN202110374929A CN113075437B CN 113075437 B CN113075437 B CN 113075437B CN 202110374929 A CN202110374929 A CN 202110374929A CN 113075437 B CN113075437 B CN 113075437B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/24—Arrangements for avoiding or indicating fraudulent use
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Abstract
The invention discloses a high-reliability intelligent electric meter, which comprises: the first shell is provided with a first cavity; the data module is arranged in the first cavity and comprises a body and a first anti-theft part arranged at the outer side end of the body; the protecting piece is rotatably arranged on the first shell above the first cavity; the trigger piece is arranged on the first shell of the opening and closing end of the protection piece and used for detecting the opening and closing state of the protection piece and judging whether to send a trigger signal. According to the intelligent electric meter, after the protection piece is opened by a non-worker, the trigger piece can detect that the protection piece is opened, the trigger piece can send a trigger signal to the circuit board, and the circuit board expands the thermosensitive material in the deformation piece, so that the deformation piece extends outwards and abuts against the inner peripheral wall of the first cavity, finally, although the first shell is opened, an operator cannot take out the data module, the effect of protecting the integrity of the intelligent electric meter is achieved, and the installation reliability of the intelligent electric meter is improved.
Description
Technical Field
The invention relates to the field of electrical equipment, in particular to a high-reliability intelligent electric meter.
Background
The intelligent electric meter is an intelligent terminal of an intelligent power grid, has the functions of bidirectional multi-rate metering, user side control, bidirectional data communication in multiple data transmission modes, electricity larceny prevention and other intelligent functions in order to adapt to the use of the intelligent power grid and new energy besides the metering function of basic electricity consumption of the traditional electric meter, and represents the development direction of an intelligent terminal of a future energy-saving intelligent power grid end user.
The circuit board of the intelligent electric meter in the prior art is usually arranged in the cavity of the lower shell, the upper shell is provided with a mounting cavity for accommodating the data module, and the mounting cavity is communicated with the cavity of the lower shell, so that the data module is in communication connection with the circuit board, and the purpose of remote meter reading is achieved. Along with the development of science and technology, the electricity stealing prevention performance of the intelligent electric meter is greatly improved, but the electricity stealing prevention performance of the intelligent electric meter body is often ignored by designers and manufacturers. The top of installation cavity is provided with the visor usually, and when the protection lid was opened, smart electric meter was provided with alarm system, still can't prevent lawless persons to steal the data module, and this kind of structure has destroyed smart electric meter's integrality, has reduced smart electric meter's installation reliability.
Disclosure of Invention
An object of the present invention is to solve the problem that a protection cover of a smart meter in the prior art is easily opened, so that a data module is easily stolen, and the installation reliability of the smart meter is low, and to provide a smart meter with high reliability.
To achieve these objects and other advantages in accordance with the present invention, there is provided a highly reliable smart meter, including:
a first housing having a first cavity;
the data module is arranged in the first cavity and comprises a body and a first anti-theft part arranged at the outer side end of the body;
a protection member rotatably disposed on the first housing above the first cavity;
the trigger piece is arranged on the first shell at the opening and closing end of the protection piece and is used for detecting the opening and closing state of the protection piece and judging whether a trigger signal is sent or not;
the first anti-theft part enables the first anti-theft part to deform according to the trigger signal, and the deformed first anti-theft part extends to the first cavity and is abutted against the inner peripheral wall of the first shell.
Preferably, a trigger platform is further disposed on the first housing above the peripheral wall of the first cavity, and the trigger member is movably disposed on a first side of the trigger platform.
Preferably, a hinge structure is arranged on the second side of the trigger platform above the first cavity, and the protection piece is connected with the first shell in a rotating mode through the hinge structure and the trigger platform in sequence.
Preferably, still include an ammeter box, the ammeter box connect in the below of first casing, be provided with the circuit board in the ammeter box, when the ammeter box is airtight, data module with the circuit board communication is connected, trigger piece passes through the circuit board makes first theftproof portion to the perisporium extends in the first cavity.
Preferably, first theftproof portion is for having hollow structure's deformation piece, deformation piece medial extremity with the laminating of body lateral wall, it has the temperature sensing material to fill in the hollow structure of deformation piece, the temperature sensing material is used for working as the circuit board is received behind the triggering signal, make deformation piece outwards extends and contradicts on the internal perisporium of first cavity.
Preferably, the circuit board is electrically connected to a heating element, and the circuit board determines whether to energize the heating element according to the trigger signal.
Preferably, the body at the inner side end of the first anti-theft portion is provided with a containing groove corresponding to the heating element, the outer circumferential wall of the heating element is attached to the inner circumferential wall of the containing groove, and the first anti-theft portion deforms by the temperature rise of the conductive heating element through heat transfer.
Preferably, the electric meter box comprises a second shell and a third shell tightly sealed below the second shell;
the second shell is provided with a second cavity, the first shell is arranged in the second cavity, an observation window is further arranged on the second shell on one side of the second cavity, and the observation window is used for displaying the electricity utilization information of the intelligent ammeter;
the third shell is provided with a third cavity for mounting the circuit board, the second shell is tightly fit with the third shell through a second anti-theft part, and the first cavity is communicated with the third cavity.
Preferably, a connecting contact is arranged on the circuit board right below the trigger piece, the bottom of the trigger piece penetrates through the first shell and is abutted against the connecting contact, and the trigger piece sends the trigger signal to the circuit board through the connecting contact.
Preferably, the second theft preventing portion includes:
the connecting unit is used for connecting the second shell and the third shell, and an anti-theft hole is formed above the connecting unit;
a locking unit integrally formed with the connection unit, the second housing being separated from or closely fitted to the third housing by the locking unit;
the unlocking unit is used for transmitting acting force to the locking unit to enable the second shell and the third shell to be separated or closely fit, the unlocking unit is connected with the connecting unit, and the unlocking unit is arranged in the anti-theft hole;
the unlocking unit is provided with a non-circular radial section, and a plurality of protrusions are arranged on the outer side end of the radial section in an extending mode.
The invention at least comprises the following beneficial effects:
1, the data module is arranged in a first cavity of a first shell, the data module comprises a body and a first anti-theft part arranged at the outer side end of the body, a protection part is rotatably arranged on the first shell above the first cavity, a trigger part is arranged on the first shell at the opening and closing end of the protection part, the trigger part is used for detecting the opening and closing state of the protection part and judging whether a trigger signal is sent or not, the first anti-theft part deforms according to the trigger signal, the deformed first anti-theft part extends to the first cavity and is abutted against the inner peripheral wall of the first shell, the trigger part enables the first anti-theft part to extend towards the inner peripheral wall of the first cavity, the first anti-theft part is a deformed part with a hollow structure, the inner side end of the deformed part is abutted against the outer side wall of the body, the hollow structure of the deformed part is filled with a heat-sensitive material, and the heat-sensitive material is used for enabling the deformed part to extend outwards and abut against the inner peripheral wall of the first cavity after a circuit board receives the trigger signal. According to the invention, after the protection piece is opened by a non-worker, the trigger piece can detect that the protection piece is opened, the trigger piece can send a trigger signal to the circuit board, and the circuit board expands the thermosensitive material in the deformation piece, so that the deformation piece extends outwards and abuts against the inner peripheral wall of the first cavity, and finally, although the first shell is opened, an operator can only inquire or maintain the data module and cannot take out the data module, so that the convenient maintenance and inquiry performance of the intelligent electric meter is maintained, the integrity of the intelligent electric meter is protected, and the installation reliability of the intelligent electric meter is improved.
2. The electric meter box body comprises a second shell and a third shell tightly sealed below the second shell, wherein a second cavity is formed in the second shell, the first shell is arranged in the second cavity, the third shell is provided with a third cavity used for installing a circuit board, the second shell is tightly sealed with the third shell through a second anti-theft part, the first cavity is communicated with the third cavity, the second anti-theft part comprises a connecting unit used for connecting the second shell and the third shell, a locking unit and a locking unit used for transmitting acting force to the locking unit to enable the second shell and the third shell to be separated or tightly sealed, an anti-theft hole is formed above the connecting unit, the unlocking unit is provided with a non-circular radial section, and a plurality of protrusions are arranged on the outer side end of the radial section in an extending mode. In the invention, as non-working personnel lack specific opening tools, the locking unit and the connecting unit can not be separated from the electric meter box body by applying force to the unlocking unit, because the sealed electric meter box body can not be opened by non-working personnel, the installation reliability of the intelligent electric meter is ensured, moreover, when the worker needs to take out the circuit board or the data module due to maintenance, the second shell and the third shell can be separated by using a tool corresponding to the unlocking unit, meanwhile, the second shell is connected with the data module on the first shell and separated from the third shell, so that the communication connection between the data module and the circuit board is disconnected, and then, even if the protection member on the first shell is opened, the trigger signal sent by the trigger member can not be received by the circuit board, make the circuit board can't make first theftproof portion take place deformation, and final staff can take out data module smoothly from first cavity.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is an exploded view of a smart meter;
FIG. 2 is a schematic structural diagram of the first housing;
FIG. 3 is a schematic diagram of an internal structure of a data module;
FIG. 4 is a schematic structural diagram of a data module after a thermosensitive material is triggered;
FIG. 5 is a schematic structural view of the second housing;
fig. 6 is a schematic structural diagram of the second anti-theft mechanism.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
The invention provides a high-reliability intelligent ammeter, and figures 1-6 show an implementation form of the intelligent ammeter, which comprises the following components: first casing 1, data module 2, protection piece 3, trigger piece 4, ammeter box 5 and circuit board 7, first casing 1 has first cavity 11, data module 2 is installed in first cavity 11, data module 2 includes body 21 and sets up the first theftproof portion 22 at the body 21 outside end, protection piece 3 rotates and sets up on the first casing 1 of the top of first cavity 11, trigger piece 4 sets up on the first casing 1 of protection piece switching end 31, trigger piece 4 is used for detecting the switching state of protection piece 3 and judges whether send trigger signal, first theftproof portion 22 makes first theftproof portion 22 produce deformation according to trigger signal, the first theftproof portion 22 of deformation extends to first cavity 11 and contradicts with the internal perisporium of first casing 1. Ammeter box 5 is connected in the below of first casing 1, is provided with circuit board 7 in the ammeter box 5, and when ammeter box 5 was closed, data module 2 was connected with circuit board 7 communication, and trigger 4 makes first theftproof portion 22 extend to the internal perisporium of first cavity 11 through circuit board 7. The first anti-theft part 22 is a deformation member 221 having a hollow structure, an inner end of the deformation member 221 is attached to an outer side wall of the body 21, an expansion material 222 is filled in the hollow structure of the deformation member 221, and the expansion material 222 is used for extending the deformation member 221 outwards and abutting against an inner peripheral wall of the first cavity 11 after the circuit board 7 receives the trigger signal. According to the invention, after the protection piece 3 is opened by a non-worker, the trigger piece 4 can detect that the protection piece 3 is opened, the trigger piece 4 can send a trigger signal to the circuit board 7, and the circuit board 7 expands the thermosensitive material 222 in the deformation piece 221, so that the deformation piece 221 extends outwards and is abutted against the inner peripheral wall of the first cavity 11, and finally, although the first shell 1 is opened, an operator can only inquire or maintain the data module 2 and cannot take out the data module 2, so that the convenient maintenance and inquiry performance of the intelligent electric meter is maintained, the integrity of the intelligent electric meter is protected, and the installation reliability of the intelligent electric meter is improved.
Specifically, the first housing 1 above the peripheral wall of the first cavity 11 is further provided with a trigger platform 12, and the trigger 4 is movably disposed on a first side 121 of the trigger platform. The second side 122 of the trigger platform above the first cavity 11 is provided with a hinge structure, and the protection member 3 is rotatably connected with the first housing 1 through the hinge structure and the trigger platform 12. The circuit board 7 is electrically connected with the heating element 71, and the circuit board 7 judges whether to electrify the heating element 71 according to the trigger signal. The body 21 at the inner end of the first anti-theft portion 22 is provided with a containing groove 211 corresponding to the heating element 71, the outer circumferential wall of the heating element 71 is attached to the inner circumferential wall of the containing groove 211, and the conductive heating element 71 is heated to deform the first anti-theft portion 22 through heat transfer. In addition, the heating element 71 is disposed in the receiving groove 211 of the data module 2, so that the connection reliability between the data module 2 and the circuit board 7 is increased, and the communication disconnection between the data module 2 and the circuit board 7 can be effectively prevented. When the protection member 3 on the first housing 1 is opened, the trigger member 4 can detect the state of the protection member 3, and transmit the trigger information to the circuit board 7, after the circuit board 7 receives the trigger information, the heating element 71 on the circuit board is electrified and heated, and because the heating element 71 is arranged in the accommodating groove 211 of the data module 2, the heat of the heating element 71 is transmitted to the first anti-theft part 22 of the data module 2, and the heat-sensitive material 222 in the first anti-theft part 22 is heated and expanded to enable the deformation member 221 to extend outwards and abut against the inner peripheral wall of the first cavity 11, so that a non-worker can be prevented from taking out the data module 2 from the first housing 1, and the reliability of the installation of the smart meter is ensured.
The electric meter box body 5 comprises a second shell 51 and a third shell 52 tightly fit below the second shell 51, a second cavity 511 is formed in the second shell 51, the first shell 1 is arranged in the second cavity 511, an observation window 512 is further arranged on the second shell 51 on one side of the second cavity 511, the observation window 512 is used for displaying electricity utilization information of the intelligent electric meter, the third shell 52 is provided with a third cavity 521 used for mounting a circuit board 7, the second shell 51 is tightly fit with the third shell 52 through a second anti-theft portion 6, and the first cavity 11 is communicated with the third cavity 521. A connecting contact 72 is arranged on the circuit board 7 right below the trigger 4, the bottom of the trigger 4 penetrates through the first housing 1 to be abutted against the connecting contact 72, and the trigger 4 sends a trigger signal to the circuit board 7 through the connecting contact 72.
The second antitheft portion 6 includes: the connecting unit 61, the locking unit 62 and the unlocking unit 63, the connecting unit 61 is used for connecting the second housing 51 and the third housing 52, the anti-theft hole 611 is formed above the connecting unit 61, the locking unit 62 and the connecting unit 61 are integrally formed, the second housing 51 is separated from or closely attached to the third housing 52 through the locking unit 62, the unlocking unit 63 is used for transmitting acting force to the locking unit 62 to separate or closely attach the second housing 51 from or to the third housing 52, the unlocking unit 63 is connected with the connecting unit 61, the unlocking unit 63 is arranged in the anti-theft hole 611, the unlocking unit 63 has a non-circular radial cross section, and a plurality of protrusions 631 extend from the outer end of the radial cross section. In the invention, since a non-worker lacks a specific opening tool, the locking unit 62 and the connecting unit 61 can not be separated from the electric meter box body 5 by applying force to the unlocking unit 63, and the electric meter box body 5 which is tightly sealed can not be opened by the non-worker, the installation reliability of the intelligent electric meter is ensured, and when a worker needs to take out the circuit board 7 or the data module 2 for maintenance, the second shell 51 and the third shell 52 can be separated by using a tool corresponding to the unlocking unit 63, and meanwhile, the second shell 51 is connected with the data module on the first shell 1 and is separated from the third shell 52, so that the communication connection between the data module 2 and the circuit board 7 is disconnected, and then, even if the protection piece 3 on the first shell 1 is opened, the trigger signal sent by the trigger piece 4 can not be received by the circuit board 7, so that the first anti-theft part 22 can not be deformed by the circuit board 7, finally, the worker can smoothly take out the data module 2 from the first cavity 11.
According to the invention, when the protection member 3 on the first housing 1 is opened, the trigger 4 can detect the state of the protection member 3, the connecting contact 72 is arranged on the circuit board 7 right below the trigger 4, the bottom of the trigger 4 penetrates through the first housing 1 to be abutted against the connecting contact 72, and the trigger 4 sends a trigger signal to the circuit board 7 through the connecting contact 72. After the circuit board 7 receives the trigger information, to heating element 71 ohmic heating above that, again because heating element 71 sets up in data module 2's storage tank 211, make heating element 71's heat transfer to data module 2 in the first theftproof portion 22, thermal sensitive material 222 in the first theftproof portion 22 is heated the inflation and makes the deformation piece 221 outwards extend and contradict on the internal perisporium of first cavity 11, finally although first casing 1 is opened, the operator only accessible inquires or maintains data module 2, can't take out data module 2, thereby both kept the convenient maintenance of smart electric meter, the performance of inquiry, the effect of protection smart electric meter integrality has been played again, smart electric meter's installation reliability has been improved. And since the non-working person lacks a specific opening tool, the locking unit 62 and the connecting unit 61 can not be separated from the electric meter box 5 by applying force to the unlocking unit 63, and since the electric meter box 5 which is tightly closed can not be opened by the non-working person, the installation reliability of the smart meter is ensured, and when the working person needs to take out the circuit board 7 or the data module 2 for maintenance, the second shell 51 and the third shell 52 can be separated by using a tool corresponding to the unlocking unit 63, and at the same time, the second shell 51 is connected with the data module on the first shell 1 and is separated from the third shell 52, so that the communication connection between the data module 2 and the circuit board 7 is disconnected, and then, even if the protection member 3 on the first shell 1 is opened, the trigger signal sent by the trigger member 4 can not be received by the circuit board 7, so that the first anti-theft portion 22 can not be deformed by the circuit board 7, finally, the worker can smoothly take out the data module 2 from the first cavity 11.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (8)
1. A highly reliable smart meter comprising:
a first housing (1) having a first cavity (11);
a data module (2) mounted in the first cavity (11), the data module (2) comprising a body (21) and a first anti-theft portion (22) arranged at an outer end of the body (21);
a protector (3) rotatably provided on the first housing (1);
the trigger piece (4) is arranged on the first shell (1) of the opening and closing end (31) of the protection piece, and the trigger piece (4) is used for detecting the opening and closing state of the protection piece (3) and judging whether to send a trigger signal or not;
the first anti-theft part (22) deforms according to the trigger signal, and the deformed first anti-theft part (22) extends to the first cavity (11) and is abutted against the inner peripheral wall of the first shell (1);
the anti-theft device is characterized by further comprising an electric meter box body (5), wherein the electric meter box body (5) is connected to the lower portion of the first shell (1), a circuit board (7) is arranged in the electric meter box body (5), when the electric meter box body (5) is closed, the data module (2) is in communication connection with the circuit board (7), and the trigger piece (4) enables the first anti-theft part (22) to extend towards the inner peripheral wall of the first cavity (11) through the circuit board (7);
first theftproof portion (22) is for having hollow structure's deformation piece (221), deformation piece (221) medial extremity with body (21) lateral wall laminating, it has heat sensitive material (222) to fill in the hollow structure of deformation piece (221), heat sensitive material (222) are used for working as circuit board (7) are received behind the trigger signal, make deformation piece (221) outwards extend and contradict on the internal perisporium of first cavity (11).
2. The highly reliable smart meter of claim 1, wherein a trigger platform (12) is further disposed on the first housing (1) above the peripheral wall of the first cavity (11), and the trigger member (4) is movably disposed on a first side (121) of the trigger platform.
3. The highly reliable smart meter of claim 2, characterized in that the second side (122) of the trigger platform above the first cavity (11) is provided with a hinge structure, and the protection member (3) is rotatably connected to the first housing (1) through the hinge structure and the trigger platform (12) in sequence.
4. The highly reliable smart meter of claim 1, wherein a heating element (71) is electrically connected to the circuit board (7), and the circuit board (7) determines whether to energize the heating element (71) according to the trigger signal.
5. The highly reliable smart meter according to claim 4, wherein a receiving groove (211) corresponding to the heating element (71) is formed in the body (21) at the inner end of the first anti-theft portion (22), an outer circumferential wall of the heating element (71) is attached to an inner circumferential wall of the receiving groove (211), and the first anti-theft portion (22) is deformed by heat transfer when the temperature of the conductive heating element (71) is increased.
6. The smart meter of claim 1, wherein the meter case (5) comprises a second housing (51) and a third housing (52) sealed under the second housing (51);
a second cavity (511) is formed in the second shell (51), the first shell (1) is arranged in the second cavity (511), an observation window (512) is further arranged on the second shell (51) on one side of the second cavity (511), and the observation window (512) is used for displaying electricity utilization information of the intelligent ammeter;
the third housing (52) has a third cavity (521) for mounting the circuit board (7), the second housing (51) is tightly fitted to the third housing (52) through a second anti-theft portion (6), and the first cavity (11) communicates with the third cavity (521).
7. The smart meter with high reliability as claimed in claim 6, wherein a connection contact (72) is provided on the circuit board (7) directly below the trigger (4), the bottom of the trigger (4) penetrates through the first housing (1) and abuts against the connection contact (72), and the trigger (4) sends the trigger signal to the circuit board (7) through the connection contact (72).
8. The highly reliable smart meter of claim 7, characterized in that said second theft prevention part (6) comprises:
a connecting unit (61) for connecting the second housing (51) and the third housing (52), wherein an anti-theft hole (611) is formed above the connecting unit (61);
a locking unit (62) integrally formed with the connecting unit (61), the second housing (51) being separated from or fitted to the third housing (52) by the locking unit (62);
an unlocking unit (63) for transmitting an acting force to the locking unit (62) to separate or close the second housing (51) and the third housing (52), wherein the unlocking unit (63) is connected with the connecting unit (61), and the unlocking unit (63) is arranged in the anti-theft hole (611);
the unlocking unit (63) is provided with a non-circular radial section, and a plurality of protrusions (631) extend from the outer side end of the radial section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110374929.0A CN113075437B (en) | 2021-04-08 | 2021-04-08 | High-reliability intelligent electric meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110374929.0A CN113075437B (en) | 2021-04-08 | 2021-04-08 | High-reliability intelligent electric meter |
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| CN113075437A CN113075437A (en) | 2021-07-06 |
| CN113075437B true CN113075437B (en) | 2022-09-27 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2489072A4 (en) * | 2009-10-14 | 2014-05-28 | Lockheed Corp | Protective circuit board cover |
| CN204536396U (en) * | 2015-04-22 | 2015-08-05 | 林学构 | A kind of electric-energy meter against charge evasion |
| US20170311469A1 (en) * | 2016-04-26 | 2017-10-26 | William Carl Anderson, III | Mounted enclosure for communication components |
| CN205643444U (en) * | 2016-04-29 | 2016-10-12 | 哈尔滨精德成套电气有限公司 | Outdoor wall -hanging batch meter |
| CN106872742A (en) * | 2017-03-21 | 2017-06-20 | 国网浙江省电力公司电力科学研究院 | A kind of modularity electric energy meter |
| CN207473727U (en) * | 2017-11-16 | 2018-06-08 | 广州天娱动漫科技有限公司 | A kind of automatic gift vending machine |
| CN109377899B (en) * | 2018-12-20 | 2024-04-30 | 刘汉春 | LED display screen with maintenance mechanism around module |
| CN110785005B (en) * | 2019-11-15 | 2020-08-28 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Air cushion protection type circuit board |
| CN211426604U (en) * | 2019-12-30 | 2020-09-04 | 浙江天顺玻璃钢有限公司 | Protective cover mounting structure of electric energy metering box |
| CN212100160U (en) * | 2020-05-08 | 2020-12-08 | 王海霞 | Product packaging structure |
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