Electric energy meter with security protection function

Abstract

This utility model belongs to the field of power metering technology, specifically referring to an energy meter with safety protection function. It includes an energy meter housing, and further includes: two terminal protective covers, respectively disposed at the upper and lower ends of the energy meter housing, corresponding to the wiring terminal areas at the upper and lower ends of the energy meter housing. The terminal protective covers are hinged to the energy meter housing via hinged lugs integrally formed with them; an anti-rebound protrusion, integrally formed on the terminal protective cover, with a corresponding anti-rebound groove provided on the energy meter housing; wherein, when the terminal protective cover is in the closed state, it closes the corresponding wiring terminal area; when opened to the maximum opening angle, the anti-rebound protrusion and the anti-rebound groove are interference-fitted to fix the terminal protective cover, and the maximum opening angle is limited and blocked by the outer wall of the energy meter housing. This utility model, through the above technical solution, provides an energy meter with safety protection function that can be stably positioned after opening and is convenient for operation and maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of power metering technology, and specifically refers to an energy meter with safety protection function. Background Technology

[0002] As a metering device in the power system, electricity meters are widely used for electricity metering and billing in civil and industrial settings. The safety protection of their wiring terminals directly affects the safety of equipment use and the convenience of operation and maintenance.

[0003] Existing electricity meters often use ordinary hinged covers for terminal protection. These covers, once opened, are prone to automatically retracting due to gravity, obstructing the wiring area and failing to maintain a stable open position, causing inconvenience for wiring and maintenance. Therefore, there is an urgent need for an electricity meter with safety protection features that can be stably positioned after opening and facilitates maintenance. Utility Model Content

[0004] This utility model features a terminal protective cover with an integral hinge at both the upper and lower ends, and uses an interference fit between the anti-rebound protrusion and the groove to achieve opening and positioning, thereby solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: an electricity meter with safety protection function includes an electricity meter housing, and further includes:

[0006] Two terminal protective covers are respectively located at the upper and lower ends of the energy meter housing and correspond to the wiring terminal areas at the upper and lower ends of the energy meter housing. The terminal protective covers are hinged to the energy meter housing through hinged lugs integrally formed with them.

[0007] Anti-rebound protrusions are integrally formed on the terminal protective cover, and anti-rebound grooves are correspondingly provided on the energy meter housing;

[0008] When the terminal protective cover is in the snap-fit ​​state, it closes the corresponding terminal area. When it is opened to the maximum opening angle, the anti-rebound protrusion and the anti-rebound groove are interference-fitted to fix the terminal protective cover, and the maximum opening angle is limited and blocked by the outer wall of the energy meter housing.

[0009] The present invention is further configured such that the energy meter housing is provided with a positioning rib, the positioning rib is integrally formed with a buckle head, and the terminal protective cover is provided with a slot adapted to the buckle head, and the buckle head cooperates with the slot in the buckling state.

[0010] The present invention is further configured such that the inner side wall of the terminal protective cover is provided with a positioning protrusion, and the outer side of the buckle head is provided with a positioning groove adapted to the positioning protrusion, wherein the positioning protrusion and the positioning groove cooperate in the buckling state.

[0011] The present invention is further configured such that the positioning protrusion is a hemispherical protrusion.

[0012] The present invention is further configured such that a first heat dissipation groove communicating with the card slot is provided on the surface of the terminal protective cover, and a second heat dissipation groove is provided on the buckle head corresponding to the position of the first heat dissipation groove. In the buckling state, the first heat dissipation groove and the second heat dissipation groove are aligned and form a communicating heat dissipation channel.

[0013] The present invention is further provided that the surface of the terminal protective cover is provided with an auxiliary heat dissipation port.

[0014] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0015] 1. By using the terminal protective cover, the one-piece molded hinge shaft, and the anti-rebound protrusion and anti-rebound groove, the protective cover can be stably positioned when it is open, which improves the convenience of wiring and maintenance of the electricity meter.

[0016] 2. By using positioning ribs, snap heads and slots, positioning protrusions and positioning grooves, the terminal protective cover is securely locked in place, improving the safety of the electricity meter wiring terminals.

[0017] 3. By combining the first heat dissipation channel, the second heat dissipation channel and the auxiliary heat dissipation port, a continuous heat dissipation channel is formed, which improves the heat dissipation performance and operational stability of the electricity meter. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model when it is fastened together;

[0020] Figure 3 This is a schematic diagram of the rotation of the terminal protective cover of this utility model.

[0021] The attached figures are labeled as follows: 1. Energy meter housing; 2. Terminal protective cover; 3. Hinge ear plate; 4. Anti-rebound protrusion; 5. Anti-rebound groove; 6. Positioning rib; 7. Buckle head; 8. Slot; 9. Positioning protrusion; 10. Positioning groove; 11. First heat dissipation channel; 12. Second heat dissipation channel; 13. Auxiliary heat dissipation port. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 :

[0023] Example 1:

[0024] This embodiment provides an energy meter with safety protection function, including an energy meter housing 1, and further including:

[0025] Two terminal protective covers 2 are respectively disposed at the upper and lower ends of the energy meter housing 1, and correspond to the wiring terminal areas at the upper and lower ends of the energy meter housing 1. The terminal protective covers 2 are hinged to the energy meter housing 1 through hinged ear plates 3 integrally formed therewith.

[0026] Anti-rebound protrusion 4 is integrally formed on the terminal protective cover 2, and anti-rebound groove 5 is correspondingly provided on the energy meter housing 1;

[0027] When the terminal protective cover 2 is in the snap-fit ​​state, it closes the corresponding terminal area. When it is opened to the maximum opening angle, the anti-rebound protrusion 4 and the anti-rebound groove 5 are interference-fitted to fix the terminal protective cover 2, and the maximum opening angle is limited and blocked by the outer wall of the energy meter housing 1.

[0028] An electricity meter is a device used to measure electrical energy, and its housing has a terminal area. In this embodiment, the electricity meter housing 1 serves as the base, and a terminal protective cover 2 is provided at its upper and lower ends, respectively, corresponding to the upper and lower terminal areas.

[0029] Regarding the hinge structure, the electricity meter housing 1 has a hinge shaft integrally formed at the position corresponding to each terminal protective cover 2. The hinge shaft is a cylindrical structure with both ends extending outward from the housing surface to form support ends. A hinge ear plate 3 is integrally provided at the edge of the terminal protective cover 2. The hinge ear plate 3 is divided into two pieces, respectively located at both ends on the same side of the terminal protective cover 2. Each hinge ear plate 3 has a hinge hole adapted to the end of the hinge shaft. During assembly, both ends of the hinge shaft are inserted into the hinge holes of the two hinge ear plates 3, allowing the terminal protective cover 2 to rotate relative to the electricity meter housing 1 around the axis of the hinge shaft, realizing the locking and unlocking action. The hinge ear plate 3 is a sheet structure and is integrally molded with the terminal protective cover 2. There is no splicing, bonding or bolt connection. The hinge hole is a smooth round hole. The hinge shaft and the hinge hole are clearance fit. There is no jamming during the flipping process of the terminal protective cover 2. The hinge part can withstand repeated flipping force for a long time without deformation or breakage, which ensures the connection strength and reliability of the hinge part.

[0030] To achieve sealing and locking of the terminal area in the engaged state, a positioning rib 6 is provided on the surface of the electricity meter housing 1 near the terminal area. The positioning rib 6 is a sheet-like structure protruding outward from the housing surface and is integrally formed with the housing. A snap-fit ​​head 7 is integrally formed at the end of the positioning rib 6 away from the housing, presenting an outwardly protruding snap-fit ​​profile. The snap-fit ​​head 7 and the positioning rib 6 are integrally formed elastic structures. The positioning rib 6 itself has a certain bending deformation capability. When the snap-fit ​​head 7 is squeezed by external force, it can drive the positioning rib 6 to bend slightly. After the external force is removed, it returns to its initial shape, thereby realizing the smooth engagement and disengagement of the snap-fit ​​head 7 and the snap-fit ​​groove 8. Correspondingly, the terminal protective cover 2 has a snap-fit ​​groove 8 at the part that aligns with the snap-fit ​​head 7 when engaged. The opening shape and size of the snap-fit ​​groove 8 are adapted to the snap-fit ​​head 7. When the terminal protective cover 2 is flipped toward the housing to the snap-fit ​​position, the snap-fit ​​head 7 is squeezed into the snap-fit ​​groove 8. Through the abutment and cooperation between the side wall of the snap-fit ​​head 7 and the groove wall of the snap-fit ​​groove 8, the terminal protective cover 2 is kept in a closed state, thereby sealing the terminal area and preventing foreign objects from entering.

[0031] To further enhance the stability of the latching state, a positioning protrusion 9 is integrally formed on the inner wall of the terminal protective cover 2. This positioning protrusion 9 is a hemispherical protrusion that bulges towards one side of the housing. Correspondingly, a positioning groove 10 is formed on the outer surface of the latch head 7, the recessed shape of which matches the hemispherical protrusion. When the terminal protective cover 2 is latched and the latch head 7 is fully inserted into the latch groove 8, the positioning protrusion 9 precisely engages in the positioning groove 10. The curved surface of the hemispherical protrusion provides a smooth positioning feel and forms a point-contact auxiliary locking position based on the latching engagement. The point-contact engagement between the hemispherical protrusion and the positioning groove 10 eliminates the lateral wobbling gap after the terminal protective cover 2 is latched. Simultaneously, the curved structure reduces frictional resistance during latching and opening, ensuring smooth opening and closing of the terminal protective cover 2 and preventing it from easily disengaging under slight external force.

[0032] During wiring or maintenance operations, the terminal protective cover 2 needs to be opened and kept in the open position. For this purpose, an anti-rebound protrusion 4 is integrally formed on the side of the terminal protective cover 2. This anti-rebound protrusion 4 is a block-shaped or rib-shaped structure protruding laterally from the cover body. The electricity meter housing 1 has an anti-rebound groove 5 at a corresponding position along the opening path of the terminal protective cover 2. The opening size of this groove is slightly smaller than the protrusion size of the anti-rebound protrusion 4. When the terminal protective cover 2 is opened upwards to the preset maximum opening angle, the rotation of the cover is directly blocked by the outer wall of the electricity meter housing 1, preventing further outward opening. This maximum opening angle is entirely determined by the limiting surface of the outer wall of the housing. At the instant this angle is reached, the anti-rebound protrusion 4 is precisely pressed into the anti-rebound groove 5, forming an interference fit. The frictional force generated by the interference fit is sufficient to resist the weight of the cover itself and minor disturbances, thereby reliably fixing the terminal protective cover 2 at the maximum opening angle. Operators can perform wiring or maintenance operations in the terminal area without holding it.

[0033] The heat dissipation structure is mainly arranged around the snap-fit ​​area. The terminal protective cover 2 has a first heat dissipation groove 11 on the groove wall of the slot 8, extending from the inside of the slot 8 to the outer surface of the protective cover and communicating with the inner cavity of the slot 8. The snap-fit ​​head 7 has a second heat dissipation groove 12 corresponding to the first heat dissipation groove 11, penetrating the side wall of the snap-fit ​​head 7. When the terminal protective cover 2 is snapped shut and the snap-fit ​​head 7 is located in the slot 8, the first heat dissipation groove 11 and the second heat dissipation groove 12 are perfectly aligned, forming a continuous heat dissipation channel. This heat dissipation channel connects the external space of the terminal area with the external space of the protective cover, allowing the heat generated inside the housing due to terminal heating to dissipate outwards sequentially through the second heat dissipation groove 12, the inner cavity of the slot 8, and the first heat dissipation groove 11, preventing accumulation in the terminal area. Meanwhile, the surface of the terminal protective cover 2 is also independently provided with an auxiliary heat dissipation port 13. The auxiliary heat dissipation port 13 is a through opening opened on the flat surface of the protective cover, which does not rely on the snap-fit ​​structure, further increasing the heat dissipation area and improving the hot air convection in the closed state.

[0034] The working process of the above structure is as follows: When wiring or maintenance is required, the operator applies a flipping force to the terminal protective cover 2 in the latched state. Initially, the latch head 7 disengages from the latch groove 8 under the action of the prying force, and the positioning protrusion 9 slides out of the positioning groove 10. After overcoming the locking resistance, the terminal protective cover 2 begins to rotate around the hinge axis. As the flipping angle increases, the protective cover gradually moves away from the wiring terminal area until the rotating part of the protective cover touches the outer wall of the energy meter housing 1. At this time, the protective cover can no longer be flipped, reaching the maximum flipping angle. Almost simultaneously, the anti-rebound protrusion 4 located on the side of the protective cover presses into the anti-rebound groove 5 on the housing and forms an interference fit, and the terminal protective cover 2 is automatically locked in this position. When the operator releases his hand, the protective cover will not fall back, and the wiring terminal area is fully exposed, allowing for direct wiring or maintenance operations. After the operation is completed, the operator applies a little force to push the protective cover in the opposite direction, causing the anti-rebound protrusion 4 to disengage from the anti-rebound groove 5, and the protective cover can then rotate back towards the housing under the guidance of the hinge axis. During the fastening process, the buckle head 7 re-inserts into the slot 8, and the positioning protrusion 9 also re-embeds into the positioning groove 10, restoring the protective cover's seal over the terminal area. Simultaneously, the first heat dissipation channel 11 and the second heat dissipation channel 12 are realigned, together with the auxiliary heat dissipation vent 13, providing a continuous heat dissipation path for the operation of the energy meter.

[0035] The connections between the above components are achieved through specific structural forms such as integral molding, hinged fit, snap-fit, interference fit, and abutment limit, forming a safety-protected energy meter that can be opened for positioning, snapped and locked, and also has heat dissipation capabilities.

[0036] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. An electricity meter with safety protection function, comprising an electricity meter housing (1), characterized in that, Also includes: Two terminal protective covers (2) are respectively located at the upper and lower ends of the energy meter housing (1) and correspond to the wiring terminal areas at the upper and lower ends of the energy meter housing (1). The terminal protective covers (2) are hinged to the energy meter housing (1) through a hinged ear plate (3) integrally formed with it. Anti-rebound protrusion (4) is integrally formed on the terminal protective cover (2), and anti-rebound groove (5) is correspondingly provided on the energy meter housing (1). When the terminal protective cover (2) is in the snap-fit ​​state, it closes the corresponding terminal area. When it is opened to the maximum opening angle, the anti-rebound protrusion (4) and the anti-rebound groove (5) are press-fitted to fix the terminal protective cover (2), and the maximum opening angle is limited and blocked by the outer wall of the energy meter housing (1).

2. The electricity meter with safety protection function according to claim 1, characterized in that, The energy meter housing (1) is provided with a positioning rib (6), and a buckle head (7) is integrally formed on the positioning rib (6). The terminal protective cover (2) is provided with a slot (8) that is adapted to the buckle head (7). In the buckled state, the buckle head (7) and the slot (8) cooperate.

3. An energy meter with safety protection function according to claim 2, characterized in that, The inner wall of the terminal protective cover (2) is provided with a positioning protrusion (9), and the outer side of the buckle head (7) is provided with a positioning groove (10) that is adapted to the positioning protrusion (9). In the buckled state, the positioning protrusion (9) and the positioning groove (10) cooperate with each other.

4. An energy meter with safety protection function according to claim 3, characterized in that, The positioning protrusion (9) is a hemispherical protrusion.

5. An energy meter with safety protection function according to claim 2, characterized in that, The terminal protective cover (2) has a first heat dissipation groove (11) that communicates with the slot (8) on its surface. The buckle head (7) has a second heat dissipation groove (12) at the position corresponding to the first heat dissipation groove (11). When the buckle is engaged, the first heat dissipation groove (11) and the second heat dissipation groove (12) are aligned and form a connected heat dissipation channel.

6. An energy meter with safety protection function according to claim 5, characterized in that, The surface of the terminal protective cover (2) is also provided with an auxiliary heat dissipation port (13).

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