Electric energy meter

Abstract

The utility model relates to an electric energy meter, comprising an upper housing and a lower housing, the upper housing is provided with a battery compartment, the front surface of the upper housing is hinged with a protective cover, the protective cover is provided with a locking assembly, the locking assembly comprises a mounting seat and a locking rod, the mounting seat is arranged at the other end of the protective cover relative to the hinged end, and the locking rod is arranged at the other end of the protective cover relative to the hinged end. A mounting channel is formed in the mounting base in an up-down penetrating mode, the locking rod is arranged in the mounting channel in an axial and radial positioning and circumferential rotatable mode, a concave part is formed in the position, corresponding to the mounting channel, of the upper shell, a first semi-circular-ring-shaped groove is formed in the inner side wall of the concave part, one end of the first semi-circular-ring-shaped groove is open, and the other end of the first semi-circular-ring-shaped groove is closed. A locking block is arranged at the position, corresponding to the first semi-annular groove, of the locking rod, and the locking rod rotates forwards and backwards to enable the locking block and the first semi-annular groove to be locked in a placed mode or unlocked in a separated mode. The technical scheme provided by the utility model has the technical effects of simple structure and convenience in operation.

Description

Technical Field

[0001] This utility model relates to the technical field of electrical energy measuring tools, and in particular to an electricity meter. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy; it is also called a kilowatt-hour meter, a power meter, or a kilowatt-hour meter, and refers to instruments that measure various electrical quantities. Current electricity meters mainly consist of an upper casing and a lower casing. The upper casing has a battery compartment for installing batteries, and the battery compartment is covered by a protective cover. One end of the protective cover is hinged to the front of the upper casing, and the other end is secured with screws. When the battery needs to be replaced, the protective cover can be opened; however, opening the protective cover requires special tools to remove the screws, making the operation relatively cumbersome. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides an energy meter that is simple in structure and easy to operate.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electricity meter, comprising an upper housing and a lower housing, wherein a battery compartment is provided on the upper housing, and a protective cover is hinged to the front of the upper housing to cover the battery compartment. A locking assembly is provided on the protective cover, the locking assembly comprising a mounting base and a locking rod, the mounting base being disposed at the other end of the protective cover opposite to its hinged end, the mounting base having a vertically extending mounting channel, the locking rod being axially and radially positioned and rotatably disposed within the mounting channel, the upper housing having a recess corresponding to the mounting channel, the locking rod passing through the mounting channel and being inserted into and communicating with the recess, a first semi-circular annular groove being provided on the inner sidewall of the recess, one end of the first semi-circular annular groove being open, a locking block corresponding to the first semi-circular annular groove being provided on the locking rod, the locking rod being able to engage and disengage the locking block with the first semi-circular annular groove by rotating forward and backward to lock or unlock.

[0005] By adopting the above technical solution, the protective cover provides protection for components such as the battery compartment. In conjunction with the locking assembly, it securely closes the protective cover to the battery compartment. The locking and unlocking mechanism facilitates opening and closing of the protective cover, thereby enabling easy removal and replacement of the battery within the battery compartment. When the protective cover needs to be opened to replace the battery, the operator rotates the locking lever in the reverse direction. The locking block on the locking lever disengages from the first semi-circular annular groove. Once the locking block is completely disengaged from the first semi-circular annular groove, the restriction of the locking block by the first semi-circular annular groove is released. The operator can then pull the locking lever to disengage it from the recessed position and open the protective cover. The operation is simple and convenient. After the battery replacement is completed, the protective cover is closed on the battery compartment. At this time, the locking lever is inserted into the recessed position. The operator rotates the locking lever in the forward direction, driving the locking lever to move the locking block into the first semi-circular annular groove along the opening direction. This locks the locking lever in the groove while simultaneously locking the protective cover onto the upper housing, ensuring structural stability. The locking rod is positioned axially and radially and is rotatably mounted in the installation channel, which prevents the locking rod from falling out of the installation channel and improves the stability of the engagement between the first semi-circular annular groove and the locking block.

[0006] The present invention further includes a limiting wall at the other end of the first semi-circular annular groove relative to the opening, which is used to limit the circumferential rotation position of the locking rod.

[0007] By adopting the above technical solution, when the locking block is placed into or out of the first semi-circular annular groove, the rotation position of the locking rod can be restricted by the setting of the limiting wall. At the same time, it can also remind the operator that the locking block has been placed into the first semi-circular annular groove, further improving the structural reliability.

[0008] The present invention further comprises: a second semi-circular annular groove is provided on the inner side wall of the installation channel, one end of the second semi-circular annular groove being open; a limiting block adapted to the locking rod is provided at the position of the second semi-circular annular groove; the locking rod can lock or unlock the limiting block with the second semi-circular annular groove by rotating forward and backward; when the locking block is locked with the first semi-circular annular groove, the limiting block is unlocked with the second semi-circular annular groove; when the locking block is unlocked with the first semi-circular annular groove, the limiting block is locked with the second semi-circular annular groove.

[0009] By adopting the above technical solution, the second semicircular annular groove and the limiting block are designed such that when the locking rod rotates and drives the locking block to disengage from the first semicircular annular groove, the limiting block on the locking rod also moves into the second semicircular annular groove along with the rotation of the locking rod. Alternatively, when the locking rod rotates and drives the locking block to move into the first semicircular annular groove, the limiting block also moves out of the second semicircular annular groove along with the rotation of the locking rod. This limits the position of the locking rod, ensuring that the locking rod is stably positioned within the installation channel whether the protective cover is opened or closed, achieving axial and radial positioning and circumferential rotation. The structure is simple.

[0010] The present invention further comprises: a first step structure is provided on the open end of the mounting channel facing away from the recess, the inner diameter of the first step structure is larger than the inner diameter of the mounting channel, a second semi-circular annular groove is provided on the inner sidewall of the first step structure, a second step structure is provided on the open end of the recess, the inner diameter of the second step structure is larger than the inner diameter of the recess, the first semi-circular annular groove is provided on the inner sidewall of the second step structure, the upper outer diameter of the locking rod is adapted to the inner diameter of the mounting channel, the lower outer diameter of the locking rod is adapted to the inner diameter of the groove, and the inner diameter of the second step structure is smaller than the inner diameter of the mounting channel.

[0011] By adopting the above technical solution, when installing the locking rod, the operator can first insert one end of the locking rod into the installation channel. During insertion, adjust the position of the limiting block so that it corresponds to the unlocking position of the upper limit block of the first step structure. After the limiting block abuts against the first step structure, rotate the locking rod to cause the limiting block to be inserted and locked along the opening of the second semi-circular annular groove. At this time, the position of the locking rod is fixed. Then, push the protective cover towards the upper housing. Through the matching of the positions of the first and second semi-circular annular grooves, the locking block on the locking rod corresponds exactly to the unlocking position of the locking block on the second step structure. When the protective cover is fastened, the locking rod can be smoothly inserted into the recessed part. Place the locking lever and rotate it again to insert the locking block on the locking lever into the opening of the first semi-circular annular groove and lock it in place, thus completing the fixed installation between the protective cover and the upper shell. The operation is convenient. The outer diameter of the upper end of the locking lever is adapted to the inner diameter of the installation channel, and the outer diameter of the lower end of the locking lever is adapted to the inner diameter of the groove. The inner diameter of the second step structure is smaller than the inner diameter of the installation channel. It can be deduced that the radius from the center of the lower end of the locking lever to the edge of the locking block is smaller than the radius of the installation channel. This makes it more convenient and smooth to insert the lower end of the locking lever into the installation channel from top to bottom, realizing the rapid assembly of the locking lever, improving installation efficiency, and also facilitating production and processing operations.

[0012] The present invention further includes: an operating component is provided on the front side of the protective cover; the other end of the locking rod relative to the recess is connected to the operating component; and the operating component is provided with an arc-shaped notch.

[0013] By adopting the above technical solution, the notch on the operating component allows the operator's fingers to be placed in the notch before rotating the locking lever, increasing the contact area, preventing slippage, and improving operational reliability. The notch is arc-shaped, which fits the fingers better and further improves the comfort during operation.

[0014] The present invention is further provided that: the end of the locking rod corresponding to the concave part is provided in an arc shape.

[0015] By adopting the above technical solution, when the locking rod is inserted into the groove, the bottom of the locking rod abuts against the bottom wall of the groove. Therefore, when the operator rotates the locking rod, the end of the locking rod is set in an arc shape, which reduces the contact area between the end of the locking rod facing the groove and the bottom wall of the groove. At the same time, the friction between the two due to rotation is also reduced, making the locking rod rotate more smoothly. Attached Figure Description

[0016] Figure 1 This is an exploded view of the structure of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Enlarged view of the A-section structure;

[0018] Figure 3 This is a partial structural cross-sectional view of an embodiment of the present utility model;

[0019] Figure 4 for Figure 3 Enlarged view of the structure of section B;

[0020] Figure 5 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0021] The labels in the diagram mean: 1-upper housing, 2-lower housing, 3-battery compartment, 4-protective cover, 5-locking assembly, 501-mounting base, 502-locking rod, 6-mounting channel, 7-recess, 8-first semi-circular annular groove, 9-locking block, 10-limiting wall, 11-second semi-circular annular groove, 12-limiting block, 13-first step structure, 14-second step structure, 15-operating component, 16-notch. Detailed Implementation

[0022] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0023] See appendix Figure 1-5This utility model discloses an electricity meter, including an upper housing 1 and a lower housing 2. A battery compartment 3 is disposed on the upper housing 1. A protective cover 4 is hinged to the front of the upper housing 1 to cover the battery compartment 3. A locking assembly 5 is disposed on the protective cover 4, comprising a mounting base 501 and a locking rod 502. The mounting base 501 is disposed at the other end of the protective cover 4 opposite to its hinged end, and a mounting channel 6 is provided vertically through the mounting base 501. The locking rod 502 is axially and radially... The upper housing 1 is positioned and rotatably disposed within the mounting channel 6. A recess 7 is provided at the position corresponding to the mounting channel 6. The locking rod 502 passes through the mounting channel 6 and is inserted into the recess 7. A first semi-circular annular groove 8 is provided on the inner side wall of the recess 7. One end of the first semi-circular annular groove 8 is open. A locking block 9 is provided at the position corresponding to the first semi-circular annular groove 8 on the locking rod 502. The locking rod 502 can lock or unlock itself by rotating forward and backward. The protective cover 4 protects components such as the battery compartment 3. It works in conjunction with the locking component 5 to securely close the cover to the battery compartment 3. The locking and unlocking of the locking component 5 facilitates opening and closing of the cover 4, thereby enabling easy removal, installation, and replacement of the battery within the battery compartment 3. When it is necessary to open the cover 4 to replace the battery, the operator rotates the locking lever 502 in the opposite direction. The locking block 9 on the locking lever 502 disengages from the first semi-circular annular groove 8. Once the locking block 9 is completely disengaged from the first semi-circular annular groove 8, the first semi-circular annular groove 8 is released. To restrict the locking block 9, the operator can pull the locking rod 502 to disengage it from the recess 7, and then lift the protective cover 4. The operation is simple and convenient. After the battery is replaced, the protective cover 4 is placed on the battery compartment 3. At this time, the locking rod 502 is inserted into the recess 7. The operator can rotate the locking rod 502 in the forward direction to drive the locking rod 502 to move the locking block 9 into the first semi-circular annular groove 8 along the opening direction of the first semi-circular annular groove 8. This locks the locking rod 502 in the groove, and at the same time, locks the protective cover 4 onto the upper housing 1, ensuring structural stability. The locking rod 502 is positioned axially and radially, and is rotatably mounted in the installation channel 6. This ensures that the locking rod 502 will not disengage from the installation channel 6, while improving the stability of the engagement between the first semi-circular annular groove 8 and the locking block 9.

[0024] This embodiment further includes a limiting wall 10 at the other end of the first semi-circular annular groove 8 relative to the opening, which limits the circumferential rotation of the locking rod 502. When the locking block 9 is inserted into or removed from the first semi-circular annular groove 8, the limiting wall 10 restricts the rotation of the locking rod 502 and also alerts the operator that the locking block 9 has been inserted into the first semi-circular annular groove 8, further improving structural reliability.

[0025] This embodiment further includes the following configuration: a second semi-circular annular groove 11 is provided on the inner wall of the installation channel 6, with one end of the second semi-circular annular groove 11 being open. A limiting block 12 is provided on the locking rod 502 corresponding to the position of the second semi-circular annular groove 11. The locking rod 502 can lock or unlock the limiting block 12 with the second semi-circular annular groove 11 by rotating forward and backward. When the locking block 9 is locked with the first semi-circular annular groove 8, the limiting block 12 is unlocked with the second semi-circular annular groove 11. When the locking block 9 is unlocked with the first semi-circular annular groove 8, the limiting block 12 is locked with the second semi-circular annular groove 11. The second semicircular annular groove 11 and the limiting block 12 are designed so that when the locking rod 502 rotates and drives the locking block 9 to disengage from the first semicircular annular groove 8, the limiting block 12 on the locking rod 502 also moves into the second semicircular annular groove 11 as the locking rod 502 rotates. Alternatively, when the locking rod 502 rotates and drives the locking block 9 to move into the first semicircular annular groove 8, the limiting block 12 also moves away from the second semicircular annular groove 11 as the locking rod 502 rotates. This limits the position of the locking rod 502, ensuring that the locking rod 502 is stably positioned within the installation channel 6 whether the protective cover 4 is opened or closed. This achieves axial and radial positioning and circumferential rotation, resulting in a simple structure. The structure of the second semicircular annular groove 11 is the same as that of the first semicircular annular groove 8, and it also has a limiting wall 10 relative to the opening direction. When the limiting block 9 is placed in the second semicircular annular groove 11, it can remind the operator that the locking block 9 has disengaged from the first semicircular annular groove 8, at which point the protective cover 4 can be opened directly.

[0026] This embodiment further includes the following configuration: a first step structure 13 is provided on the open end of the mounting channel 6 facing away from the recess 7, the inner diameter of the first step structure 13 is larger than the inner diameter of the mounting channel 6, the second semi-circular annular groove 11 is provided on the inner sidewall of the first step structure 13, a second step structure 14 is provided on the open end of the recess 7, the inner diameter of the second step structure 14 is larger than the inner diameter of the recess 7, the first semi-circular annular groove 8 is provided on the inner sidewall of the second step structure 14, the upper outer diameter of the locking rod 502 is adapted to the inner diameter of the mounting channel 6, the lower outer diameter of the locking rod 502 is adapted to the inner diameter of the groove, and the inner diameter of the second step structure 14 is smaller than the inner diameter of the mounting channel 6. When installing the locking rod 502, the operator can first insert one end of the locking rod 502 into the installation channel 6. During insertion, adjust the position of the limiting block 12 so that it corresponds to the unlocking position of the upper limit block 12 of the first step structure 13. After the limiting block 12 abuts against the first step structure 13, rotate the locking rod 502 to make the limiting block 12 enter and lock along the opening of the second semi-circular annular groove 11. At this time, the position of the locking rod 502 is fixed. Then push the protective cover 4 towards the upper housing 1. Through the positional cooperation of the first semi-circular annular groove 8 and the second semi-circular annular groove 11, the locking block 9 on the locking rod 502 corresponds exactly to the unlocking position of the locking block 9 on the second step structure 14. When the protective cover 8 is fastened, the locking rod 502 can be smoothly inserted into the recess. At position 7, simultaneously rotate the locking rod 502 again, so that the locking block 9 on the locking rod 502 is inserted and locked along the opening of the first semi-circular annular groove 8, completing the fixed installation between the protective cover 4 and the upper housing 1. The operation is convenient. The outer diameter of the upper end of the locking rod 502 is adapted to the inner diameter of the installation channel 6, and the outer diameter of the lower end of the locking rod 502 is adapted to the inner diameter of the groove. The inner diameter of the second step structure 14 is smaller than the inner diameter of the installation channel 6. It can be deduced that the radius from the center of the lower end of the locking rod 502 to the edge of the locking block 9 is smaller than the radius of the installation channel 6, making it more convenient and smooth when the lower end of the locking rod 502 is inserted into the installation channel 6 from top to bottom, realizing the rapid assembly of the locking rod, improving installation efficiency, and also facilitating production and processing operations.

[0027] This embodiment further includes the following features: an operating element 15 is provided on the front side of the protective cover 4; the other end of the locking rod 502 relative to the recess 7 is connected to the operating element 15; and the operating element 15 has an arc-shaped notch 16. The notch 16 on the operating element 15 allows the operator's fingers to be inserted into the notch 16 when rotating the locking rod 502, increasing the contact area, preventing slippage, and improving operational reliability. The arc-shaped notch 16 also better fits the fingers, further enhancing operational comfort.

[0028] In this embodiment, the locking rod 502 is further configured such that one end of the locking rod 502 corresponding to the recess 7 is arc-shaped. When the locking rod 502 is inserted into the recess, the bottom of the locking rod 502 abuts against the bottom wall of the recess. Therefore, when the operator rotates the locking rod 502, the arc-shaped end of the locking rod 502 reduces the contact area between the end of the locking rod 502 facing the recess 7 and the bottom wall of the recess 7, and also reduces the friction between the two due to rotation, making the rotation of the locking rod 502 smoother.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. An electricity meter, comprising an upper housing and a lower housing, wherein a battery compartment is disposed on the upper housing, and a protective cover is hinged to the front of the upper housing for covering the battery compartment, characterized in that: The protective cover is provided with a locking assembly, which includes a mounting base and a locking rod. The mounting base is located at the other end of the protective cover opposite to its hinge end, and the mounting base has a through mounting channel running vertically through it. The locking rod is axially and radially positioned and rotatably mounted in the mounting channel. The upper housing has a recess corresponding to the mounting channel position. The locking rod passes through the mounting channel and is inserted into the recess for communication. A first semi-circular annular groove is provided on the inner sidewall of the recess. One end of the first semi-circular annular groove is open. A locking block is provided corresponding to the position of the locking rod in the first semi-circular annular groove. The locking rod can lock or unlock by rotating forward and backward.

2. An electricity meter according to claim 1, characterized in that: The first semi-circular annular groove has a limiting wall at the other end relative to the opening to restrict the circumferential rotation position of the locking rod.

3. An electricity meter according to claim 1, characterized in that: The inner wall of the installation channel is provided with a second semi-circular annular groove, one end of which is open. A limiting block is provided corresponding to the position of the locking rod in the second semi-circular annular groove. The locking rod can lock or unlock the limiting block with the second semi-circular annular groove by rotating it forward and backward. When the locking block is locked with the first semi-circular annular groove, the limiting block is unlocked with the second semi-circular annular groove. When the locking block is unlocked with the first semi-circular annular groove, the limiting block is locked with the second semi-circular annular groove.

4. An electricity meter according to claim 3, characterized in that: The installation channel has a first step structure on its open end facing away from the recess. The inner diameter of the first step structure is larger than the inner diameter of the installation channel. The second semi-circular annular groove is located on the inner wall of the first step structure. The recess has a second step structure on its open end. The inner diameter of the second step structure is larger than the inner diameter of the recess. The first semi-circular annular groove is located on the inner wall of the second step structure. The outer diameter of the upper end of the locking rod is adapted to the inner diameter of the installation channel. The outer diameter of the lower end of the locking rod is adapted to the inner diameter of the groove. The inner diameter of the second step structure is smaller than the inner diameter of the installation channel.

5. An electricity meter according to claim 1, characterized in that: An operating component is provided on the front side of the protective cover. The locking rod is connected to the operating component at the other end relative to the recess. The operating component has an arc-shaped notch.

6. An electricity meter according to claim 1, characterized in that: The locking lever has an arc-shaped end corresponding to the recessed part.

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