Electric energy meter with lead seal structure

Abstract

The application discloses an electric energy meter with a lead seal structure, which comprises a box body and a meter cover arranged on the box body, and a programming button is arranged on the meter cover; the electric energy meter further comprises a lead seal structure; the lead seal structure is rotatably arranged on the meter cover, and the lead seal structure is provided with a limiting portion for limiting downward movement of the programming button; in a closed state, the limiting portion limits the downward movement of the programming button; in an open state, the lead seal structure is rotated to make the lead seal structure and the programming button disengage from the limiting state, so that the programming button can be pressed downward. Compared with the prior art, the application has a reasonable structure design, and the programming button cannot be pressed in the closed state, so that the misoperation is prevented, and the reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of electricity meters, and more specifically to an electricity meter with a lead seal structure. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy. It is also called an electricity meter, watt-hour meter, or kilowatt-hour meter. It refers to an instrument that measures various electrical quantities.

[0003] Currently, electricity meters are usually equipped with a programming button on the meter cover. The programming button consists of a button cap and a button shaft. The lower end of the button shaft is electrically connected to the PCB board inside the electricity meter. Operators can press the programming button to program the electricity meter and modify and set the relevant metering parameters inside the electricity meter.

[0004] Typically, electricity meters have through holes on their covers for installing programming buttons. For example, the Chinese utility model patent CN201120112886.0 (authorization announcement number CN202057699U), titled "Casing of a Single-Phase Local Prepaid Smart Electricity Meter," features a programming button and a rotating display button on its cover. While the programming button can be installed, it requires a lead seal for fixation after installation. Even with the seal intact, the button can still rotate partially, resulting in a partially depressed state. This can easily lead to erroneous operation and, over long-term use, compromise the reliability of the meter's internal parameters, posing a potential safety hazard.

[0005] Therefore, further improvements are needed to the lead seal structure of the existing electricity meter programming button. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an energy meter that prevents erroneous operation of the programming button when it is in the off state, thereby improving reliability.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: an energy meter with a lead seal structure, comprising a housing and a meter cover disposed on the housing, wherein the meter cover is provided with a programming button; characterized in that:

[0008] The electricity meter also includes:

[0009] A lead seal structure is rotatably mounted on the watch cover, the lead seal structure having a limiting part for restricting the downward movement of the programming button;

[0010] When closed, the limit switch restricts the programming button from moving downwards;

[0011] In the open state, the lead seal structure rotates to disengage the lead seal structure from the programming button, allowing the programming button to be pressed down.

[0012] To keep the lead seal structure closed and prevent accidental operation, preferably, the lead seal structure includes:

[0013] A lead seal, having a lead seal hole and rotatably mounted on the watch cover, the end of the lead seal having a limiting portion for restricting the downward movement of the programming button;

[0014] A locking element is located inside the lead seal hole and is used to restrict the rotation of the lead seal.

[0015] For assembling the lead seal structure, preferably, the lead seal is provided with an elastic locking block, and correspondingly, the cover has a guide groove for accommodating the elastic locking block; the elastic locking block can move within the guide groove. When the lead seal is rotated, the elastic locking block moves within the guide groove.

[0016] To facilitate rotation of the lead seal, preferably, the lead seal comprises:

[0017] A lead seal post is rotatably mounted on the watch cover, with a limiting part at one end, and the elastic locking block is located on the peripheral wall of the lead seal post;

[0018] The handshake part is located at the other end of the lead seal post.

[0019] To ensure accurate rotation of the lead seal and enhance user comfort, preferably, the grip area has a raised indicator post near the watch cover. Correspondingly, the mounting part has a first step that abuts against the grip area. Rotation of the grip area causes the indicator post to pass over the first step. When the indicator post passes over the first step, the grip area vibrates due to the collision between the indicator post and the first step, allowing the user to feel this vibration and thus confirm and rotate the watch to the correct position.

[0020] Preferably, the side of the cover has an outwardly protruding mounting portion, the mounting portion having a mounting hole, and the lead seal post is rotatably mounted in the mounting hole.

[0021] For ease of assembly, preferably, the bottom end of the side wall of the grip portion is provided with a protruding extension, the top end of the extension is an arc surface and located at the bottom of the mounting portion, and correspondingly, the bottom end of the mounting portion is an arc surface.

[0022] Preferably, the mounting portion has a second step, and the elastic locking block abuts against the second step when it is located in the guide groove. The elastic locking block abuts against the second step, thus being confined within the guide groove and preventing it from detaching from the cover. Furthermore, the top opening of the guide groove communicates with the outside. When it is necessary to remove the lead seal, a rod-shaped or hook-shaped tool can be used to penetrate the guide groove through the opening and move the elastic locking block to disengage it from the second step, thereby removing the lead seal.

[0023] To ensure that the limiting part disengages from the programming button when the lead seal rotates, the limiting part is preferably fan-shaped, with the center of the arc surface of the fan located on the axis of the lead seal. The limiting part can also be a protrusion or similar shape.

[0024] Preferably, the programming button includes an end and a button post located at the bottom of the end. In the closed state, the limiting part is located at the bottom of the end and abuts against the end, thereby restricting the programming button from moving downward.

[0025] Compared with the prior art, the advantages of the present invention are as follows: it has a limiting part that restricts the downward movement of the programming button, the structure is reasonably designed, and when the lead seal structure is rotated to the closed state, the limiting part restricts the downward movement of the programming button, thereby making the programming button unable to be pressed, thus preventing accidental operation and increasing reliability; when the programming button needs to be used, the lead seal structure is rotated to disengage the limiting part from the programming button, so that the programming button can be pressed down; in addition, the lead seal structure is simple in structure, easy to assemble, and has high production efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure in the closed state of the embodiment;

[0027] Figure 2 This is a cross-sectional view of the embodiment in its closed state;

[0028] Figure 3 for Figure 2 Enlarged view of point A;

[0029] Figure 4 This is a schematic diagram of the structure in the open state of the embodiment;

[0030] Figure 5 This is a cross-sectional view of the embodiment in its open state (excluding the silicone buttons);

[0031] Figure 6 for Figure 5 Enlarged view of point B;

[0032] Figure 7 This is a schematic diagram of the lead seal used in an embodiment;

[0033] Figure 8 This is a schematic diagram of the structure of an embodiment (excluding the lead seal structure). Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] like Figure 1-8 The diagram shows a preferred embodiment of the present invention. The energy meter with a lead seal structure 4 includes a housing 1, a meter cover 2 disposed on the housing 1, a programming button 3, and the lead seal structure 4.

[0036] The programming button 3 is located on the meter cover 2. The programming button 3 includes an end 31 and a button post 32 located at the bottom of the end 31. In the closed state, the limiting part 412 is located at the bottom of the end 31 and abuts against the end 31, thereby restricting the downward movement of the programming button 3. The bottom end of the button post 32 is provided with a silicone button 33 connected to the housing 1. The bottom of the silicone button 33 has an electric contact. When the programming button 3 is pressed down, it causes the silicone button 33 to deform, and the electric contact contacts the PCB board (not shown in the figure) inside the meter box. After the external force of pressing down is removed, the silicone button 33 rebounds, causing the programming button 3 to return to its original position.

[0037] The lead seal structure 4 is rotatably mounted on the cover 2, and the lead seal structure 4 has a limiting part 412 for restricting the downward movement of the programming button 3;

[0038] The lead seal structure 4 includes a lead seal element 41 and a locking element 42.

[0039] The lead seal 41 has a lead seal hole 411 and is rotatably mounted on the watch cover 2. The end 31 of the lead seal 41 has a limiting part 412 for restricting the downward movement of the programming button 3. The lead seal 41 is provided with an elastic locking block 413, and correspondingly, the watch cover 2 has a guide groove 21 for accommodating the elastic locking block 413. The elastic locking block 413 can move within the guide groove 21. The lead seal 41 includes a lead seal post 414 and a grip part 415. The lead seal post 414 is rotatably mounted on the watch cover 2, with a limiting part 412 at one end. The elastic locking block 413 is located on the peripheral wall of the lead seal post 414. The grip part 415 is located at the other end of the lead seal post 414. The grip part 415 has a protruding indicator post 416 near the side of the watch cover 2. Correspondingly, the side of the watch cover 2 has a first step 22 that abuts against the grip part 415. The rotation of the grip part 415 causes the indicator post 416 to pass through the first step 22. The locking member 42 is disposed in the lead seal hole 411 and is used to restrict the rotation of the lead seal member 41. The limiting part 412 is fan-shaped, and the center of the arc surface of the fan is located on the axis of the lead seal post 414, so that the limiting part 412 changes position as the lead seal post 414 rotates.

[0040] The side of the cover 2 has an outwardly protruding mounting portion 23, which has a mounting hole 24, a first step 22, and a second step 25. The lead seal post 414 is rotatably mounted in the mounting hole 24. The bottom end of the side wall of the grip portion 415 has a protruding extension 417, the top end of which is arc-shaped and located at the bottom of the mounting portion 23. Correspondingly, the bottom end of the mounting portion 23 is arc-shaped. When the elastic block 413 is located in the guide groove 21, it abuts against the second step 25. A blocking portion 26 extends outward from the mounting portion 23. In the closed state, one side of the lead seal 41 abuts against the blocking portion 26, and in the open state, the other side of the lead seal 41 abuts against the blocking portion 26, thereby helping the user judge the rotation angle and preventing incomplete rotation.

[0041] The usage process of this embodiment is as follows:

[0042] like Figure 1-3 As shown, in the closed state, the locking member 42 is located in the lead seal hole 411 to restrict the rotation of the lead seal member 41, and the limiting part 412 is located at the bottom of the end 31 and abuts against the end 31 to restrict the programming button 3 from moving downward.

[0043] like Figure 4-6 As shown, in the open state, the locking member 42 disengages from the lead seal hole 411, and the lead seal structure 4 rotates, causing the limiting part of the lead seal structure 4 to rotate and disengage from the programming button 3, so that the programming button 3 can be pressed down; after the external force of pressing down disappears, the silicone button 33 springs back, driving the programming button 3 back to its original position.

Claims

1. An electricity meter with a lead seal structure, comprising a housing (1) and a meter cover (2) disposed on the housing (1), wherein the meter cover (2) is provided with a programming button (3); characterized in that: The electricity meter also includes: A lead seal structure (4) is rotatably mounted on the cover (2), the lead seal structure (4) having a limiting part (412) for restricting the downward movement of the programming button (3); The lead seal structure (4) includes: A lead seal (41) having a lead seal hole (411) and rotatably mounted on the cover (2), the end (31) of the lead seal (41) having a limiting part (412) for limiting the downward movement of the programming button (3); The lead seal (41) is provided with an elastic locking block (413), and correspondingly, the cover (2) has a guide groove (21) for accommodating the elastic locking block (413); the elastic locking block (413) can move within the guide groove (21); The lead seal (41) also includes: A lead seal post (414) is rotatably mounted on the cover (2), and one end has a limiting part (412). The elastic block (413) is located on the peripheral wall of the lead seal post (414). The limiting part (412) is fan-shaped, and the center of the arc surface of the fan is located on the axis of the lead seal post (414); The programming button (3) includes an end (31) and a button post (32) located at the bottom of the end (31). In the closed state, the limiting part (412) is located at the bottom of the end (31) and abuts against the end (31), thereby restricting the programming button (3) from moving downward. In the closed state, the limit part (412) restricts the programming button (3) from moving downward; In the open state, the lead seal structure (4) rotates to disengage the lead seal structure (4) from the programming button (3) from the limit state, so that the programming button (3) can be pressed down.

2. The energy meter with a lead seal structure according to claim 1, characterized in that: The lead seal structure (4) includes a locking member (42) disposed in the lead seal hole (411) and used to restrict the rotation of the lead seal member (41).

3. The energy meter with a lead seal structure according to claim 1, characterized in that: The lead seal (41) includes a handle (415) located at the other end of the lead seal post (414).

4. The energy meter with a lead seal structure according to claim 3, characterized in that: The side of the cover (2) has an outwardly protruding mounting portion (23), the mounting portion (23) has a mounting hole (24), and the lead seal post (414) is rotatably mounted in the mounting hole (24).

5. The energy meter with a lead seal structure according to claim 4, characterized in that: The handshake part (415) has a raised indicator post (416) on the side near the watch cover (2). Correspondingly, the mounting part (23) has a first step (22) that abuts against the handshake part (415). The handshake part (415) rotates and drives the indicator post (416) to pass through the first step (22).

6. The energy meter with a lead seal structure according to claim 5, characterized in that: The bottom of the side wall of the handshake part (415) is provided with a protruding extension (417). The top of the extension (417) is an arc surface and is located at the bottom of the mounting part (23). Correspondingly, the bottom of the mounting part (23) is an arc surface.

7. The energy meter with a lead seal structure according to claim 4, characterized in that: The mounting part (23) also has a second step (25), which abuts against the second step (25) when the elastic block (413) is located in the guide groove (21).

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