Electric energy meter

Abstract

The utility model relates to an electric energy meter, which comprises a shell, an upper cover and a lower cover, the upper cover is fixedly connected with the shell, the lower cover is rotatably arranged on the upper cover, the shell is provided with a mounting plate, the lower cover is provided with a mounting groove for inserting the mounting plate, and the shell and the lower cover are in buckled connection through the mounting plate and the mounting groove. The lower cover and the mounting plate are respectively provided with a through hole for the lead seal to pass through, and the through hole in the lower cover is communicated with the mounting groove. A buckle fixing structure and the penetrating hole allowing the lead seal to penetrate through are integrated, and the buckle fixing and lead seal mounting effects are achieved on the basis of the simple structure.

Description

Technical Field

[0001] This application relates to the field of electricity meters, and more particularly to an electricity meter. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy. It needs to be sealed with a lead seal to prevent unauthorized personnel from illegally opening the meter. The lead seal is a security measure to ensure that the electricity meter is not illegally tampered with or altered. However, after some maintenance and calibration, the electricity meter needs to be opened to remove the original lead seal and apply a new lead seal to ensure the safety of the electricity meter.

[0003] In existing technology, an electricity meter includes a housing, an upper cover, and a lower cover. The upper cover is fixedly installed on the housing by means of snap-fit ​​connections, and the lower cover is rotatably installed on the upper cover. Both the housing and the lower cover have through holes through which a lead seal passes. In this existing technology, the housing and lower cover are relatively fixed by the lead seal. However, since the total length of the lead seal is greater than the total length of the seal passing through the through hole, the housing and lower cover may become loose during use due to external factors, and the lower cover may wobble. Utility Model Content

[0004] To improve the installation stability of the lower cover and the housing, this application provides an electricity meter.

[0005] This application provides an electricity meter that adopts the following technical solution:

[0006] An electricity meter includes a housing, an upper cover, and a lower cover. The upper cover is fixedly connected to the housing, and the lower cover is rotatably mounted on the upper cover. The housing is provided with a mounting plate, and the lower cover has a mounting groove for inserting the mounting plate. The housing and the lower cover are connected by a snap-fit ​​between the mounting plate and the mounting groove. Both the lower cover and the mounting plate have through holes for lead seals to pass through, and the through holes on the lower cover communicate with the mounting groove.

[0007] By adopting the above technical solution, a snap-fit ​​structure is set on the shell and the lower cover to ensure that the shell and the lower cover are locked relative to each other. Then, a lead seal is used for secondary fixation. In this way, even if the electricity meter itself vibrates due to external factors, the shell and the cover will not loosen relative to each other. The locking between the shell and the cover is more stable. Furthermore, the snap-fit ​​structure and the through hole for the lead seal to pass through are integrated into one place, achieving the functions of snap-fit ​​fixation and lead seal installation on a simple structure.

[0008] Optionally, one of the groove walls of the mounting groove is a locking surface, which is located on the side of the mounting plate near the rotation axis of the lower cover, and a clearance groove is provided on the locking surface.

[0009] By adopting the above technical solution and setting a clearance groove, the clearance groove makes room for the mounting plate on the basis of the mounting plate being snapped and fixed to the mounting groove, thereby reducing the degree of deformation of the mounting plate and reducing the installation difficulty of the mounting plate being snapped into the mounting groove.

[0010] Optionally, a relief slope is formed on the side wall of the relief groove, and the lower cover can be rotated until the relief slope is tangent to the end of the mounting plate.

[0011] By adopting the above technical solution, the clearance slope is tangent to the end of the mounting plate, ensuring that the clearance slope does not interfere with the side of the mounting plate, and ensuring that the lower cover can rotate normally, thus playing a clearance role.

[0012] Optionally, a locking ramp is formed on the side wall of the relief groove. The locking ramp is located on the side of the relief ramp closer to the locking surface. The distance between the locking ramp and the mounting plate decreases in the direction away from the housing. The relief ramp and the locking ramp have the same inclination direction. The angle formed by the relief ramp and the locking surface is smaller than the angle formed by the locking ramp and the locking surface.

[0013] By adopting the above technical solution, the locking bevel is inclined, and it presses against one side of the mounting plate, thereby deforming the mounting plate and guiding it into the mounting groove, achieving a labor-saving effect. The locking bevel has a large inclination angle, which increases the length of the locking surface and ensures a stable locking effect. The relief bevel has a small inclination angle, which reduces the opening size of the relief groove while ensuring the relief effect, thus reducing the possibility of the lead seal passing through the relief groove opening.

[0014] Optionally, the mounting plate has a guide arc surface on the end for insertion into the mounting slot, the guide arc surface facing the locking surface and used for locking the inclined surface abutment.

[0015] By adopting the above technical solution, the guide arc surface and the locking slope slide against each other, which further improves the convenience of the mounting plate being inserted into the mounting groove.

[0016] Optionally, the lower cover includes a mounting protrusion, and a perforation on the lower cover is formed on the mounting protrusion, the wall of the perforation extending in an arc shape.

[0017] By adopting the above technical solution, if the guide groove lead seal with sharp edges is prone to interference and obstruction at the corner of the guide groove, it will cause the lead seal to not pass smoothly. The arc-shaped perforation has no sharp edges and can play a better guiding role, improving the convenience of lead seal installation.

[0018] Optionally, the lower cover includes a partition disposed on the inner wall of the perforation, and the mounting groove is formed by the mounting protrusion and the partition enclosing each other.

[0019] By adopting the above technical solution, the perforation is divided into two sections by a partition, which plays a better guiding role in the passage of the lead seal.

[0020] Optionally, the housing is provided with a guide plate for inserting into the clearance groove.

[0021] By adopting the above technical solution, the guide plate is inserted into the relief slot. The guide plate can block the relief slot and guide the lead seal, preventing the lead seal from passing through the relief slot. In addition, the user cannot see the inside of the electricity meter through the relief slot, which is more aesthetically pleasing.

[0022] Optionally, the perforation extends to the guide plate.

[0023] By adopting the above technical solution, the perforation extends to the guide plate, achieving the continuity of the perforation and further improving the guiding effect on the lead seal.

[0024] Optionally, the lower cover is provided with a rotating rod, and the upper cover is provided with a rotating groove for inserting the rotating rod.

[0025] By adopting the above technical solution, the lower cover rotates around the rotating groove. The rotating rod and rotating groove have a simple structure, are easy to process, and rotate stably.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The buckle fixing structure and the through hole for the lead seal to pass through are integrated into one place, so as to achieve the functions of buckle fixing and lead seal installation on a simple structure;

[0028] 2. While ensuring a stable locking effect and a proper clearance effect, reduce the size of the clearance groove opening to decrease the possibility of the lead seal protruding from the clearance groove opening;

[0029] 3. The guide plate can shield the clearance slot, guide the lead seal, and prevent users from seeing the inside of the electricity meter through the clearance slot, which is more aesthetically pleasing. Attached Figure Description

[0030] Figure 1 This is a structural diagram of this application.

[0031] Figure 2 This is a partial schematic diagram of the shell and the top cover in this application.

[0032] Figure 3 This is a schematic diagram of the structure of the lower cover in this application.

[0033] Figure 4 This is a partial sectional view of the lower cover in the rotating state in this application.

[0034] Figure 5 yes Figure 2 Enlarged view of point A in the middle

[0035] Figure 6 This is a partial sectional view of the lower cover in the locked state in this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Top cover; 21. Rotating groove; 3. Bottom cover; 31. Mounting groove; 311. Locking surface; 32. Perforation; 33. Clearance groove; 331. Clearance slope; 332. Locking slope; 4. Mounting plate; 41. Guide arc surface; 5. Mounting protrusion; 6. Guide plate; 7. Rotating rod; 8. Partition plate. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0038] This application discloses an electricity meter. (Refer to...) Figure 1 The electricity meter includes a housing 1, an upper cover 2 and a lower cover 3. The upper cover 2 and the housing 1 are relatively fixed by means of snap-fit ​​connection, etc., and the lower cover 3 is rotatably installed on the upper cover 2.

[0039] Reference Figure 2 and Figure 3 An installation plate 4 is integrally formed on the side wall of the housing 1 facing the lower cover 3. The lower cover 3 has an installation groove 31 for inserting the installation plate 4. The housing 1 and the lower cover 3 are connected by the installation plate 4 and the installation groove 31. Both the lower cover 3 and the installation plate 4 have through holes 32 for the lead seal to pass through. The through holes 32 on the lower cover 3 are connected to the installation groove 31.

[0040] Reference Figure 1 The upper cover 2 and the lower cover 3 are arranged in an up-down direction, with the upper cover 2 located above the lower cover 3. The upper cover 2 and the housing 1 are arranged in a front-back direction, with the upper cover 2 located in front of the housing 1.

[0041] Reference Figure 2 and Figure 3 The lower cover 3 has a rotating rod 7 integrally formed on it, and the upper cover 2 has a rotating groove 21 for the rotating rod 7 to be inserted and rotated. The rotating rod 7 is located on the front side of the lower cover 3, that is, the rotation axis of the rotating rod 7 is located in front of and above the center point of the lower cover 3.

[0042] Reference Figure 4 When the lower cover 3 rotates away from the housing 1, the upper sidewall of the lower cover 3 rotates away from the lower sidewall of the upper cover 2, and the upper sidewall of the lower cover 3 will not interfere with the lower sidewall of the upper cover 2. In this way, while ensuring that the rotation of the lower cover 3 does not interfere with the upper cover 2, the gap between the upper sidewall of the lower cover 3 and the lower sidewall of the upper cover 2 is minimized after the lower cover 3 is relatively locked with the housing 1.

[0043] Reference Figure 1 and Figure 3 The lower cover 3 includes a mounting protrusion 5 integrally formed on the side wall facing the housing 1. A through hole 32 on the lower cover 3 is formed on the mounting protrusion 5 and aligned with a through hole 32 on the mounting plate 4. The wall of the through hole 32 on the mounting protrusion 5 extends in an arc shape. The lower cover 3 also includes a partition 8 integrally formed on the wall of the through hole 32. The partition 8 extends to the surface of the lower cover 3 away from the housing 1. A mounting groove 31 is formed on the surface of the mounting protrusion 5 near the housing 1. The mounting groove 31 is formed by the mounting protrusion 5 and the partition 8. The partition 8 divides the through hole 32 on the lower cover 3 into two sections. The openings of the two sections of the through hole 32 on the side wall of the lower cover 3 serve as the inlet and outlet of the lead seal, respectively.

[0044] In other embodiments, the mounting protrusion 5 may not be provided. Instead, two through holes 32 are made on the mounting groove 31 of the lower cover 3, which are aligned with the through holes 32 on the mounting plate 4. Two through holes 32 are made on the side wall of the lower cover 3 away from the housing 1 as the entrance and exit of the lead seal. These two through holes 32 are located on the upper and lower sides of the mounting groove 31, respectively.

[0045] Reference Figure 3 and Figure 4 The upper wall of the mounting groove 31 is a locking surface 311. A clearance groove 33 is formed on the surface of the locking surface 311 near the housing 1. The clearance groove 33 communicates with the through hole 32 and passes through the surface of the mounting protrusion 5 near the housing 1. The clearance groove 33 is used to make way for the mounting plate 4 when the lower cover 3 rotates, and presses against one side of the mounting plate 4, thereby squeezing the mounting plate 4 into the mounting groove 31.

[0046] Reference Figure 3 and Figure 4 A clearance slope 331 is formed on the side wall of the clearance groove 33, and the clearance slope 331 is located at the location furthest from the mounting groove 31. The clearance slope 331 is inclined in a direction that is closer to the mounting groove 31 the further away from the housing 1 it is.

[0047] Reference Figure 4 and Figure 5 The upper front side of the mounting plate 4 has a guide arc surface 41 formed by a rounding process. When the lower cover 3 is rotated, the guide arc surface 41 of the mounting plate 4 is tangent to the clearance slope 331.

[0048] Reference Figure 3 and Figure 4A locking ramp 332 is formed on the side wall of the clearance groove 33. The locking ramp 332 is adjacent to the locking surface 311 and is located between the clearance ramp 331 and the locking surface 311. The inclination direction of the locking ramp 332 is the same as that of the clearance ramp 331. The inclination angle between the clearance ramp 331 and the locking surface 311 is smaller than the inclination angle between the locking ramp 332 and the locking surface 311. When the lower cover 3 rotates toward the direction closer to the housing 1, the locking ramp 332 presses against and slides against the guide arc surface 41 on the mounting plate 4, thereby guiding the mounting plate 4 to engage in the mounting groove 31.

[0049] Reference Figure 5 and Figure 6 A guide plate 6 is integrally formed on the housing 1 above the mounting plate 4. The front sidewall of the guide plate 6 is located behind the front sidewall of the mounting plate 4, so that the clearance groove 33 will not interfere with the guide plate 6 when the lower cover 3 rotates. The perforation 32 extends to the guide plate 6. After the lower cover 3 rotates to lock relative to the housing 1, the guide plate 6 is inserted into the clearance groove 33, thereby sealing the clearance groove 33 without obstructing the perforation 32, guiding the lead seal through, and making it more aesthetically pleasing when viewed from the front of the lower cover 3.

[0050] The implementation principle of an energy meter according to an embodiment of this application is as follows: First, the lower cover 3 is rotated and installed on the upper cover 2. Then, the lower cover 3 is rotated toward the direction close to the housing 1. The clearance slope 331 on the clearance groove 33 avoids the mounting plate 4. The locking slope 332 on the clearance groove 33 slides against the mounting plate 4 and squeezes the mounting plate 4 to deform it. Finally, the mounting plate 4 is pressed into the mounting groove 31. The side of the guide plate 6 abuts against the edge of the through hole 32 on the clearance groove 33 and the edge of the through hole 32 on the mounting plate 4. At this time, the lower cover 3 and the housing 1 are fastened together. Then, the lead seal is inserted through the through hole 32 on the lower cover 3, passes through the through hole 32 on the mounting plate 4, and finally exits through the through hole 32 on the lower cover 3 to fix the lead seal.

[0051] This application integrates the snap-fit ​​structure with the through hole 32 through which the lead seal passes, achieving both snap-fit ​​fixing and lead seal installation on a simple structural basis.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electricity meter, characterized in that: The device includes a housing (1), an upper cover (2), and a lower cover (3). The upper cover (2) is fixedly connected to the housing (1), and the lower cover (3) is rotatably mounted on the upper cover (2). The housing (1) is provided with a mounting plate (4), and the lower cover (3) is provided with a mounting groove (31) for the mounting plate (4) to be inserted. The housing (1) and the lower cover (3) are connected by a snap-fit ​​between the mounting plate (4) and the mounting groove (31). Both the lower cover (3) and the mounting plate (4) are provided with a through hole (32) for the lead seal to pass through. The through hole (32) on the lower cover (3) is connected to the mounting groove (31).

2. The electricity meter according to claim 1, characterized in that: One of the groove walls of the mounting groove (31) is a locking surface (311). The locking surface (311) is located on the side of the mounting plate (4) near the rotation axis of the lower cover (3). A clearance groove (33) is provided on the locking surface (311).

3. The electricity meter according to claim 2, characterized in that: The sidewall of the relief groove (33) has a relief slope (331) formed thereon, and the lower cover (3) can be rotated until the relief slope (331) is tangent to the end of the mounting plate (4).

4. The electricity meter according to claim 3, characterized in that: A locking ramp (332) is formed on the side wall of the relief groove (33). The locking ramp (332) is located on the side of the relief ramp (331) close to the locking surface (311). The distance between the locking ramp (332) and the mounting plate (4) decreases in the direction away from the housing (1). The relief ramp (331) and the locking ramp (332) are in the same direction of inclination. The angle formed by the relief ramp (331) and the locking surface (311) is smaller than the angle formed by the locking ramp (332) and the locking surface (311).

5. The electricity meter according to claim 4, characterized in that: The mounting plate (4) has a guide arc surface (41) on the end for inserting into the mounting groove (31), the guide arc surface (41) facing the locking surface (311) and for locking the inclined surface (332) to abut.

6. The electricity meter according to claim 1, characterized in that: The lower cover (3) includes a mounting protrusion (5), and a perforation (32) on the lower cover (3) is formed on the mounting protrusion (5), and the wall of the perforation (32) extends in an arc shape.

7. The electricity meter according to claim 6, characterized in that: The lower cover (3) includes a partition (8) disposed on the inner wall of the perforation (32), and the mounting groove (31) is formed by the mounting protrusion (5) and the partition (8).

8. The electricity meter according to claim 2, characterized in that: The housing (1) is provided with a guide plate (6), which is used to insert into the clearance groove (33).

9. The electricity meter according to claim 8, characterized in that: The perforation (32) extends onto the guide plate (6).

10. The electricity meter according to claim 1, characterized in that: The lower cover (3) is provided with a rotating rod (7), and the upper cover (2) is provided with a rotating groove (21) for inserting the rotating rod (7).

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