A wall-mounted electric energy metering box with a branch box

Abstract

The application relates to a wall-mounted electric energy metering box with a branch box, and relates to the technical field of smart power grids, and comprises a box body and a box door rotatably installed on the front side of the box body; a mounting plate is arranged in the box body in the vertical direction; a plurality of wiring boxes with wire connection ports downwards are detachably installed on the front side of the mounting plate in the horizontal direction; locking pieces are arranged on the left and right edges of the mounting plate; the locking pieces are used for realizing the detachable connection between the mounting plate and the inner wall of the box body; in the application, the independent mounting plate is additionally arranged; a plurality of wiring boxes are pre-installed on the front side of the mounting plate in the box body in the detachable mode; cable pre-arrangement and component pre-installation are completed; the narrow space in the box is avoided to constrain the installation operation; and the cumbersome procedures of alignment and wiring in the box are reduced.

Description

Technical Field

[0001] This application relates to the technical field of smart grids, and in particular to a wall-mounted power metering box with a junction box. Background Technology

[0002] Wall-mounted electricity metering boxes are core terminal devices for electricity consumption-side metering and distribution management in smart grids, widely used in residential communities, commercial buildings, and industrial plants. Their core function is to integrate electricity metering, circuit protection, and electricity consumption monitoring modules, enabling accurate collection, transmission, and secure management of three-phase or single-phase electricity consumption data. These devices typically employ a wall-mounted installation structure, offering advantages such as compact size, small footprint, and convenient maintenance. They align with the development needs of smart grids for miniaturized, integrated, and intelligent terminal devices, and are a key infrastructure for ensuring grid metering accuracy and improving distribution management efficiency.

[0003] Existing wall-mounted energy metering boxes mainly consist of a box body, a rotatable door, and internal core electrical components. These components include miniature circuit breakers and plug-in three-phase meters, with electrical connections between them via pre-installed cables. The specific wiring logic is as follows: each three-phase meter requires one live wire, one neutral wire, and one ground wire, connected to the corresponding terminals of the circuit breaker; a total of nine cables need to be led out from the three meters and terminated and secured one by one. To address the issue of messy internal cabling, current technology typically installs three independent junction boxes on the inner wall of the box. Each junction box houses and secures the terminals of three cables, thus achieving a neat and organized cable layout.

[0004] In the existing installation process, the three junction boxes need to be fixed one by one to the preset positions on the inner wall of the enclosure with screws. However, the metering box integrates multiple components such as circuit breakers and meters, and the reserved installation space is already very limited, which makes the alignment and installation of the junction boxes extremely inconvenient. On the other hand, during installation, the mounting holes of the junction boxes must be precisely aligned with the multiple screw holes pre-drilled on the inner wall of the enclosure in order to complete the screw tightening operation. This not only consumes a lot of manual operation time and effort, but also easily leads to repeated disassembly and assembly due to misalignment of the screw holes, which seriously affects the overall assembly efficiency and has room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a wall-mounted power metering box with a junction box, which solves the problem in the above-mentioned related technologies that the junction box needs to be fixed with screws one by one, which is affected by the limited space inside the box and the cumbersome alignment of screw holes, resulting in low assembly efficiency and time and labor consumption.

[0006] The wall-mounted energy metering box with junction box provided in this application adopts the following technical solution: A wall-mounted electricity metering box with junction boxes includes a box body and a door rotatably mounted on the front side of the box body; a mounting plate is provided in the vertical direction inside the box body, and several junction boxes with downward-facing terminals are detachably mounted side by side in the horizontal direction on the front side of the mounting plate; locking elements are provided on the left and right edges of the mounting plate, and the locking elements are used to realize the detachable connection between the mounting plate and the inner wall of the box body.

[0007] By adopting the above technical solution and adding an independent mounting plate, several junction boxes can be pre-installed side-by-side on the front of the mounting plate outside the enclosure, completing cable pre-organization and component pre-assembly. This avoids the constraints of the confined space inside the enclosure on installation operations and reduces the tedious procedures of alignment and wiring inside the enclosure. The locking components on the left and right edges of the mounting plate enable quick and detachable connection between the mounting plate and the inner wall of the enclosure, eliminating the need to align the mounting holes of each junction box with the screw holes on the enclosure wall one by one. This replaces the traditional method of fixing junction boxes with screws one by one, avoiding repeated disassembly and assembly caused by misalignment of screw holes, and saving a significant amount of manual operation time and effort.

[0008] Optionally, the locking component includes a locking plate and a connecting plate rotatably connected to the mounting plate on one side. The side of the connecting plate away from the mounting plate is perpendicularly fixedly connected to one side of the locking plate. The locking plate has a locking through hole, and the inner wall of the box has a locking screw hole. The connecting plate can rotate in a direction away from the box door to a support state perpendicular to the mounting plate. At this time, the locking plate is in an installation state where its back side is in contact with the inner wall of the box, and the locking through hole can coincide with the locking screw hole.

[0009] By adopting the above technical solution, the connecting plate can be rotated to a support state perpendicular to the mounting plate during installation, which can quickly make the back of the locking plate fit against the inner wall of the box, and at the same time make the locking through hole and the locking screw hole of the box wall accurately coincide, without the need to repeatedly adjust the position of the mounting plate.

[0010] Optionally, the locking plate can be rotated to a protective state parallel to the side of the mounting plate facing the junction box during the factory shipment of the mounting plate and several junction boxes. The outer side of the mounting plate is provided with a limiting member to limit the locking plate in the protective state and the mounting state.

[0011] By adopting the above technical solution, during factory shipment, the locking plate can rotate with the connecting plate to a protective state parallel to the side of the mounting plate facing the junction box. Combined with the locking mechanism, the locking plate and connecting plate form a protective barrier, preventing external impacts from damaging the pre-installed junction box and reducing transportation losses. During installation, the locking mechanism further limits the locking plate in its installed state, preventing it from shifting or shaking, ensuring precise alignment of the locking through-hole and screw hole, and a secure connection. This structure eliminates the need for additional protective components, achieving dual functionality through state switching, simplifying the overall structural design, saving production materials, improving the reliability of transportation and installation, and adapting to mass production and on-site assembly needs.

[0012] Optionally, the limiting component includes an elastic limiting rod with elastic shortening properties and a limiting hook fixed to one end of the elastic limiting rod; the mounting plate is rotatably connected to the end of the elastic limiting rod away from the limiting hook on its bottom surface when the locking plate is in the installation state, and a protruding rod is fixed on the bottom surface of the locking plate at this time, and the rotating surface of the elastic limiting rod is parallel to the top surface of the box; the limiting hook can engage with the protruding rod as the elastic limiting rod rotates when the locking plate is in the installation state and the protective state.

[0013] By adopting the above technical solution, the elastic limit rod combines rotational and elastic shortening capabilities. Combined with the snap-fit ​​structure of the limit hook and protruding rod, no complex operations are required; simply rotating the elastic limit rod is sufficient to quickly lock the locking plate in its installation and protective states. The elasticity compensates for snap-fit ​​gaps, ensuring a tight fit between the limit hook and protruding rod, preventing accidental displacement of the locking plate during transportation or installation. The design, with the rotating surface parallel to the top surface of the enclosure, fits the internal spatial layout and does not interfere with other components during operation. The overall structure requires no additional drive components, resulting in lower material consumption and a lower failure rate. This ensures the protective stability of the junction box during transportation and improves the efficiency and reliability of on-site installation.

[0014] Optionally, when the locking plate is in the protective state, a limiting baffle can be detachably installed on the side facing the junction box, and an elastic pad that abuts against the junction box is fixed on the side of the limiting baffle away from the locking plate at this time.

[0015] By adopting the above technical solution, in the locked plate protection state, the rubber elastic pad of the limiting folding plate abuts against the junction box, changing the rigid protection into flexible protection, avoiding damage caused by direct collision between the locking plate and the junction box during transportation, and improving the protection effect.

[0016] Optionally, the mounting plate is provided with a positioning element, the connecting plate has a first notch, the locking plate has a second notch communicating with the first notch, and one side edge of the limiting folding plate is rotatably connected to the opening edge of the first notch; when the locking plate is in the protective state, the limiting folding plate rotates to a retracted state within the first and second notches; when the locking plate is in the installation state, the limiting folding plate rotates to an unfolded state outside the first and second notches and is fixed by the positioning element, at which time the elastic pad abuts against the side of the junction box away from the mounting plate.

[0017] By adopting the above technical solution, in the protective state, the limiting folding plate can be rotated into the connecting first and second notches to form a storage structure, preventing it from protruding and occupying space or being damaged by external impacts. Simultaneously, it works with the elastic pad to provide flexible protection for the junction box. In the installation state, the limiting folding plate rotates out of the notches and unfolds, secured by the positioning component. The elastic pad abuts against the outside of the junction box, providing lateral clamping force and enhancing the connection stability between the junction box and the mounting plate, preventing loosening during use. The notch-connecting design allows for smooth unfolding and storage, while the positioning component ensures reliable unfolding. No additional components are needed, simplifying the structure with a single component serving two purposes, adapting to all transportation and installation scenarios.

[0018] Optionally, the positioning component includes a positioning plate, a positioning protrusion fixed to one side of the positioning plate, and an elastic positioning rod rotatably mounted on the side of the positioning plate away from the positioning protrusion. The positioning plate has a positioning notch, and the elastic positioning rod has elastic elongation properties. The rotating surface of the elastic positioning rod is parallel to the side of the positioning plate away from the positioning protrusion. The mounting plate has a third notch on its bottom surface when the locking plate is in the installation state, and the limiting folding plate has a first slot on its bottom surface at this time. The positioning protrusion is rotatably connected to the opening edge of the third notch. The positioning plate can rotate to a horizontal forward position at this time, and the elastic positioning rod can rotate to a vertical upward position and be inserted into the first slot. The cable connected to the junction box can pass through the positioning notch at this time.

[0019] By adopting the above technical solution, the positioning plate is rotatably connected to the third notch via a positioning protrusion. Combined with the snap-fit ​​structure where the elastic positioning rod is inserted into the first slot, this securely locks the unfolded state of the limiting folding plate, preventing displacement and loosening, and ensuring a lateral clamping effect on the junction box. The elastic elongation performance of the elastic positioning rod compensates for the fitting gap, improving the reliability of the fixation. The direction design of the rotating surface adapts to the operating space inside the box, making disassembly and assembly more convenient. Simultaneously, the positioning notch on the positioning plate can limit the passage of cables, achieving neat and orderly collection of cables connected to the junction box, avoiding cable tangling, optimizing the wiring layout inside the box, and meeting both structural fixation and cable management requirements.

[0020] Optionally, a guide slope is provided at the outer edge of the end of the elastic positioning rod away from the positioning plate, and a first slope is provided at the opening edge of the first slot.

[0021] By adopting the above technical solution, the guide slope and the first slope cooperate to achieve the guiding and positioning of the elastic positioning rod inserted into the first slot, reducing the difficulty of insertion and alignment, improving operation efficiency, and at the same time buffering the insertion impact force to ensure the stability of the structural fit.

[0022] Optionally, the mounting plate has a fourth notch on its back side that communicates with the third notch when the locking plate is in the installation state, and the two limiting folding plates have a second slot on their sides facing the second notch; when the locking plate is in the protective state, the positioning plate can rotate into the fourth notch along with the positioning protrusion, and the two elastic positioning rods can rotate in opposite directions to a coaxial state at this time, and the ends of the elastic positioning rods away from the positioning plate can be inserted into the second slot.

[0023] By adopting the above technical solution, in the protective state, the positioning plate can rotate with the positioning protrusion into the fourth notch that connects to the third notch, thus completing the hidden storage of the positioning component and avoiding its protrusion and space occupation or damage from transportation bumps. At the same time, it optimizes the utilization rate of the space inside the box. The two elastic positioning rods rotate in opposite directions to the coaxial position and insert into the second slot, which can reliably limit the limiting plate in the storage state, preventing the limiting plate from coming out of the first and second notches during transportation, and further enhancing the transportation protection effect.

[0024] Optionally, a second bevel is provided at the opening edge of the second slot.

[0025] By adopting the above technical solution, the second inclined surface provides guidance for the insertion of the elastic positioning rod into the second slot, reducing the difficulty of insertion and alignment under protective conditions, improving the ease of operation, and at the same time buffering the insertion impact, ensuring the fixed stability of the limiting folding plate in the storage state.

[0026] In summary, this application includes the following beneficial technical effects: In this application, an independent mounting plate is added, allowing several junction boxes to be pre-installed side-by-side and detachably mounted on the front of the mounting plate outside the enclosure. This completes cable pre-organization and component pre-assembly, avoiding the constraints of the confined space inside the enclosure on installation operations and reducing the tedious procedures of alignment and wiring inside the enclosure. The locking components on the left and right edges of the mounting plate enable quick and detachable connection between the mounting plate and the inner wall of the enclosure, eliminating the need to align the mounting holes of each junction box with the screw holes on the enclosure wall one by one. This replaces the traditional method of fixing junction boxes with screws one by one, avoiding repeated disassembly and assembly caused by misalignment of screw holes, and saving a significant amount of manual operation time and effort. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional structural diagram illustrating the installation and assembly of the mounting plate and junction box according to an embodiment of this application; Figure 3 This is a partial cross-sectional structural diagram illustrating the installation and mating of the locking component in an embodiment of this application; Figure 4 This is a schematic diagram illustrating the installation and cooperation of the connecting plate and the locking plate in an embodiment of this application; Figure 5This is a schematic diagram illustrating the installation and assembly of the connecting plate and the mounting plate in an embodiment of this application; Figure 6 This is an exploded structural diagram illustrating the installation distribution of the limiting member and the mounting plate in an embodiment of this application; Figure 7 This application's embodiment illustrates a cross-sectional structural diagram of the installation and fit of the limiting folding plate; Figure 8 This is an exploded structural diagram illustrating the installation distribution of the limiting folding plate and the mounting plate in an embodiment of this application; Figure 9 This is a partial structural diagram illustrating the installation and cooperation of the elastic positioning rod and the limiting folding plate in an embodiment of this application; Figure 10 This is a partial cross-sectional view of an embodiment of the present application illustrating the installation and cooperation of the elastic positioning rod and the limiting folding plate; Figure 11 yes Figure 10 An enlarged schematic diagram of part A in the middle; Figure 12 This is an exploded structural diagram illustrating the installation and distribution of the limiting folding plate and the locking plate in an embodiment of this application; Figure 13 This is a cross-sectional structural diagram illustrating the installation and fit of the elastic positioning rod in an embodiment of this application; Figure 14 yes Figure 13 Enlarged diagram of part B.

[0028] In the diagram: 1. Box body; 11. Locking screw hole; 2. Box door; 3. Mounting plate; 31. Third notch; 32. Fourth notch; 4. Junction box; 5. Locking component; 51. Connecting plate; 511. First notch; 52. Locking plate; 521. Locking through hole; 522. Second notch; 53. Protruding rod; 6. Limiting component; 61. Elastic limiting rod; 62. Limiting hook; 7. Limiting folding plate; 71. Elastic pad; 72. First slot; 721. First inclined surface; 73. Second slot; 731. Second inclined surface; 8. Positioning component; 81. Positioning plate; 811. Positioning notch; 82. Positioning protrusion; 83. Elastic positioning rod; 831. Guide inclined surface. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0030] Reference Figure 1 , Figure 2 and Figure 3A wall-mounted electricity metering box with a junction box includes a box body 1 and two boxes 2 rotatably installed on the front side of the box body 1; a mounting plate 3 is provided in the box body 1 along the vertical direction, and three junction boxes 4 with downward-facing terminals are detachably installed side by side along the horizontal direction on the front side of the mounting plate 3; locking elements 5 are provided on the left and right edges of the mounting plate 3. When installing junction boxes 4, the three junction boxes 4 can be pre-installed on the front side of the mounting plate 3 that has not yet been installed on the inner wall of the enclosure 1, and then the mounting plate 3 with the three junction boxes 4 installed can be quickly installed on the inner wall of the enclosure 1 by means of locking parts 5.

[0031] Reference Figure 3 and Figure 4 The locking component 5 includes a locking plate 52 and a connecting plate 51 that is rotatably connected to the mounting plate 3 on one side. The side of the connecting plate 51 away from the mounting plate 3 is perpendicularly fixed to the side of the locking plate 52. The locking plate 52 has a locking through hole 521 and the inner wall of the housing 1 has a locking screw hole 11. When the mounting plate 3 is installed on the housing 1, the connecting plate 51 is first rotated away from the housing door 2 to a support state perpendicular to the mounting plate 3. At this time, the locking plate 52 is in the installation state where the back is in contact with the inner wall of the housing 1, and the locking through hole 521 can coincide with the locking screw hole 11. Then, the screw is screwed into the corresponding locking screw hole 11 after passing through the locking through hole 521.

[0032] Reference Figure 5 and Figure 6 The outer side of the mounting plate 3 is provided with a limiting member 6 that can limit the locking plate 52 in the installation state. When the pre-installed mounting plate 3 and the three junction boxes 4 are shipped from the factory, the locking plate 52 can be rotated with the connecting plate 51 to a protective state that is parallel to the side of the mounting plate 3 facing the junction box 4. The limiting member 6 can also limit the locking plate 52 in the protective state. In this way, the locking plate 52 and the connecting plate 51 protect the junction box 4 in the transportation state, reducing the problem of damage to the junction box 4 due to transportation bumps.

[0033] Reference Figure 4 and Figure 5 The limiting component 6 includes an elastic limiting rod 61 with elastic shortening performance and a limiting hook 62 fixed to one end of the elastic limiting rod 61. The elastic limiting rod 61 is a conventional telescopic structure with an internal spring, which will not be described in detail here. When the locking plate 52 is in the installation state, a protruding rod 53 is fixed on its bottom surface. At this time, the bottom surface of the mounting plate 3 is rotatably connected to the end of the elastic limiting rod 61 away from the limiting hook 62, and the rotating surface of the elastic limiting rod 61 is parallel to the top surface of the box 1. When the locking plate 52 is in the installation state and the protection state, the limit hook 62 can be engaged with the protruding rod 53 as the elastic limit rod 61 rotates. In this way, the combination of the elastic limit rod 61, the limit hook 62 and the protruding rod 53 can limit and lock the two states of the locking plate 52.

[0034] Reference Figure 7 and Figure 8 When the locking plate 52 is in the protective state, a limiting baffle 7 can be detachably installed on the side facing the junction box 4. At this time, a rubber elastic pad 71 is fixed on the side of the limiting baffle 7 away from the locking plate 52. When the locking plate 52 is in a protected state (i.e., the pre-installed structure is shipped from the factory), one side of the elastic pad 71 abuts against the outer side of the junction box 4, reducing the possibility of collision between the locking plate 52 and the junction box 4 during transportation.

[0035] Reference Figure 7 and Figure 8 The mounting plate 3 is provided with a positioning element 8, the connecting plate 51 is provided with a first notch 511, the locking plate 52 is provided with a second notch 522 that communicates with the first notch 511, and one side edge of the limiting folding plate 7 is rotatably connected to the opening edge of the first notch 511. When the locking plate 52 is in the protective state, the limiting flap 7 rotates to the retracted state within the first notch 511 and the second notch 522; when the locking plate 52 is in the installation state, the limiting flap 7 rotates to the unfolded state, disengaging from the first notch 511 and the second notch 522, and is fixed by the positioning member 8. The elastic pad 71 abuts against the side of the junction box 4 away from the mounting plate 3, thereby enhancing the installation stability of the junction box 4 and the mounting plate 3.

[0036] Reference Figure 9 , Figure 10 and Figure 11 The positioning component 8 includes a positioning plate 81, a positioning protrusion 82 fixed to one side of the positioning plate 81, and an elastic positioning rod 83 rotatably mounted on the side of the positioning plate 81 away from the positioning protrusion 82. The positioning plate 81 has a positioning notch 811. The elastic positioning rod 83 is a conventional telescopic structure with an internal spring and elastic elongation performance, which will not be described in detail here. The rotating surface of the elastic positioning rod 83 is parallel to the side of the positioning plate 81 away from the positioning protrusion 82. A guide slope 831 is provided at the outer edge of the end of the elastic positioning rod 83 away from the positioning plate 81. The mounting plate 3 has a third notch 31 on its bottom surface when the locking plate 52 is in the installation state. The limiting folding plate 7 has a first slot 72 on its bottom surface at this time, and a first inclined surface 721 is provided at the opening edge of the first slot 72. The positioning protrusion 82 is rotatably connected to the opening edge of the third notch 31. When the locking plate 52 is in the installation state, the positioning plate 81 is rotated to the horizontal and forward position, and the elastic positioning rod 83 is rotated to the vertical and upward position and inserted into the first slot 72. At this time, the cable connected to the junction box 4 can pass through the positioning notch 811. The positioning plate 81 and the elastic positioning rod 83 can limit the current state of the locking plate 52, and the positioning notch 811 on the positioning plate 81 can further limit and gather the cable connected to the junction box 4.

[0037] Reference Figure 12 , Figure 13 and Figure 14 The mounting plate 3 has a fourth notch 32 on the back side of the locking plate 52 when the locking plate 52 is in the installation state, which communicates with the third notch 31. The two limiting folding plates 7 have a second slot 73 on the side facing the second notch 522, and a second inclined surface 731 is provided at the opening edge of the second slot 73. When the locking plate 52 is in the protective state, the positioning plate 81 rotates into the fourth notch 32 along with the positioning protrusion 82, and the two elastic positioning rods 83 rotate in opposite directions to the coaxial state. The end of the elastic positioning rod 83 away from the positioning plate 81 can be inserted into the second slot 73. In this way, the positioning plate 81 and the elastic positioning rod 83 are housed in the fourth notch 32, and the elastic positioning rod 83 further limits the limiting plate 7 at this time.

[0038] The implementation principle of this application embodiment is as follows: During factory shipping, the three junction boxes 4 are pre-installed on the front of the unsecured mounting plate 3. Then, the connecting plate 51 is rotated to bring the locking plate 52 to a protective state parallel to the mounting plate 3. At this time, the limiting plate 7 rotates into the first notch 511 and the second notch 522 for storage. Then, the elastic limiting rod 61 rotates to make the limiting hook 62 engage with the protruding rod 53 of the locking plate 52, thus completing the limiting of the locking plate 52. The positioning plate 81 rotates into the fourth notch 32 along with the positioning protrusion 82, and the elastic positioning rod 83 rotates in opposite directions to insert into the second slot 73, realizing the storage of the positioning component 8 and the fixation of the limiting plate 7. At this time, the rubber elastic pad 71 of the limiting plate 7 abuts against the junction box 4, forming a protective barrier with the locking plate 52 and the connecting plate 51, reducing damage from bumps during transportation.

[0039] In the installation state, first release the locking hook 62 from the protruding rod 53, then rotate the locking plate 52 to the installation state, and then rotate the elastic limiting rod 61 again to limit the state of the protruding rod 53 at this time; rotate the limiting folding plate 7 to the unfolded state, and rotate the elastic positioning rod 83 to insert it into the first slot 72 on the limiting folding plate 7, with the elastic pad 71 abutting against the junction box 4 for reinforcement. Finally, align the locking through hole 521 on the locking plate 52 with the locking screw hole 11 on the box wall, and screw the screw through the locking through hole 521 and into the locking screw hole 11 for fixation. The positioning notch 811 of the positioning plate 81 can collect the cables connected to the junction box 4, achieving the dual effect of installation fixation and cable limiting.

[0040] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wall-mounted electric energy metering box with a branch box, comprising a box body (1) and a box door (2) rotatably installed on the front side of the box body (1); characterized in that, The housing (1) is provided with a mounting plate (3) in the vertical direction. Several junction boxes (4) with downward-facing terminals are detachably installed side by side on the front side of the mounting plate (3) in the horizontal direction. Locking elements (5) are provided on the left and right edges of the mounting plate (3). The locking elements (5) are used to realize the detachable connection between the mounting plate (3) and the inner wall of the housing (1).

2. A wall-mounted electric energy metering box with a branch box according to claim 1, characterized in that, The locking component (5) includes a locking plate (52) and a connecting plate (51) that is rotatably connected to the mounting plate (3) on one side. The side of the connecting plate (51) away from the mounting plate (3) is vertically fixed to the side of the locking plate (52). The locking plate (52) has a locking through hole (521) and the inner wall of the box (1) has a locking screw hole (11). The connecting plate (51) can be rotated in a direction away from the door (2) to a support state perpendicular to the mounting plate (3). The locking plate (52) is in an installation state where its back side is in contact with the inner wall of the box (1). The locking through hole (521) can coincide with the locking screw hole (11).

3. A wall-mounted electric energy metering box with a branch box according to claim 2, characterized in that, When the mounting plate (3) and several junction boxes (4) are shipped from the factory, the locking plate (52) can be rotated with the connecting plate (51) to a protective state that is parallel to the side of the mounting plate (3) facing the junction box (4). The outer side of the mounting plate (3) is provided with a limiting member (6) that limits the locking plate (52) in the protective state and the mounting state.

4. A wall-mounted electric energy metering box with a branch box according to claim 3, characterized in that, The limiting component (6) includes an elastic limiting rod (61) with elastic shortening performance and a limiting hook (62) fixed to one end of the elastic limiting rod (61); the mounting plate (3) is rotatably connected to the end of the elastic limiting rod (61) away from the limiting hook (62) on the bottom surface of the locking plate (52) when the locking plate (52) is in the installation state, and a protruding rod (53) is fixed on the bottom surface of the locking plate (52) at this time, and the rotating surface of the elastic limiting rod (61) is parallel to the top surface of the box (1) at this time; the limiting hook (62) can engage with the protruding rod (53) as the elastic limiting rod (61) rotates when the locking plate (52) is in the installation state and the protection state.

5. A wall mounted electrical energy metering box with a junction box according to claim 4, characterized in that, When the locking plate (52) is in the protective state, a limiting baffle (7) can be detachably installed on the side facing the junction box (4). At this time, the limiting baffle (7) has an elastic pad (71) fixed on the side away from the locking plate (52) that abuts against the junction box (4).

6. A wall-mounted electric energy metering box with a branch box according to claim 5, characterized in that, The mounting plate (3) is provided with a positioning element (8), the connecting plate (51) is provided with a first notch (511), the locking plate (52) is provided with a second notch (522) communicating with the first notch (511), and one side edge of the limiting folding plate (7) is rotatably connected to the opening edge of the first notch (511). When the locking plate (52) is in the protective state, the limiting plate (7) is rotated to the storage state within the first notch (511) and the second notch (522); when the locking plate (52) is in the installation state, the limiting plate (7) is rotated to the unfolded state outside the first notch (511) and the second notch (522) and fixed by the positioning member (8), and the elastic pad (71) at this time abuts against the side of the junction box (4) away from the mounting plate (3).

7. A wall-mounted electric energy metering box with a branch box according to claim 6, characterized in that, The positioning component (8) includes a positioning plate (81), a positioning protrusion (82) fixed to one side of the positioning plate (81), and an elastic positioning rod (83) rotatably mounted on the side of the positioning plate (81) away from the positioning protrusion (82). The positioning plate (81) has a positioning notch (811), and the elastic positioning rod (83) has elastic elongation properties. The rotating surface of the elastic positioning rod (83) is parallel to the side of the positioning plate (81) away from the positioning protrusion (82). The mounting plate (3) has a third notch (31) on its bottom surface when the locking plate (52) is in the installation state. The limiting folding plate (7) has a first slot (72) on its bottom surface at this time. The positioning protrusion (82) is rotatably connected to the opening edge of the third notch (31). The positioning plate (81) can rotate to a horizontal forward state at this time. The elastic positioning rod (83) can rotate to a vertical upward state and be inserted into the first slot (72). The cable connected to the junction box (4) can pass through the positioning notch (811) at this time.

8. A wall-mounted electric energy metering box with a branch box according to claim 7, characterized in that, The elastic positioning rod (83) has a guide slope (831) at the outer edge of its end away from the positioning plate (81), and the first slot (72) has a first slope (721) at the opening edge.

9. A wall mounted electrical energy metering box with a junction box according to claim 7, characterized in that, The mounting plate (3) has a fourth notch (32) on its back side that communicates with the third notch (31) when the locking plate (52) is in the mounting state, and the two limiting folding plates (7) have a second slot (73) on their sides facing the second notch (522); When the locking plate (52) is in a protected state, the positioning plate (81) can rotate into the fourth notch (32) along with the positioning protrusion (82). At this time, the two elastic positioning rods (83) can rotate in opposite directions to a coaxial state. The end of the elastic positioning rod (83) away from the positioning plate (81) can be inserted into the second slot (73).

10. A wall-mounted power metering box with a junction box according to claim 9, characterized in that, The second slot (73) has a second bevel (731) at the opening edge.

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