Anti-interference structure for indicating lamp of electric energy meter

Abstract

The utility model provides an electric energy meter indicating lamp anti-interference structure, which comprises a meter cover, a meter bottom, a liquid crystal support, a light guide column and a PCB (printed circuit board), and is characterized in that the lower side of the liquid crystal support is provided with a light blocking feature in an integrated manner, and the light blocking feature is used for blocking light sources of patch indicating lamps and preventing light channeling between adjacent indicating lamps. The device can accurately prevent interference, intercepts light from the bottom of a light source, avoids light channeling of the indicating lamp, and ensures accurate state display; meanwhile, the structure is optimized, the light blocking characteristic is small, space is reasonably utilized, and stability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy meters, in particular to an anti-interference structure for an indicator light of an electric energy meter. Background Art

[0002] With the development of technology in the power industry, various types of electric energy meter products are being used more and more widely, and the functions of electric energy meters are also increasing. As a device that directly reflects the operating status of various functions of the meter, the number of indicator lights is also increasing with the increase of functions, and the colors are becoming more and more abundant. Due to its specifications and installation environment restrictions, the meter is usually compact in structure. The traditional plug-in test indicator light is extremely unfriendly to the meter PCB layout due to its installation method. The SMD indicator light is easy to install and cheap, so the SMD indicator light is often used in the new smart electric energy meter.

[0003] Existing SMD indicator lights are generally used with transparent light guides. This creates a problem that due to volume limitations, the distance between indicator lights is not enough to avoid interference from nearby SMD light sources, or because the light guide is too long, light crosstalk affects status judgment and signal communication. Usually, light blocking is achieved by designing a light-blocking wall on the cover or adding a light-shielding part to the light guide. The disadvantages of this are:

[0004] 1. The light-blocking wall is added to the cover. Due to its high height and thin wall thickness, this feature is easy to deform or produce gaps during actual production, resulting in installation interference or light leakage;

[0005] 2. Adding shading parts will increase material costs and labor costs. Summary of the invention

[0006] In order to solve the above problems, the utility model proposes an anti-interference structure for an electric energy meter indicator light, comprising a meter cover, a meter bottom, a liquid crystal bracket, a light guide column and a PCB board. The lower side of the liquid crystal bracket is integrated with a light-blocking feature, and the light-blocking feature is used to intercept the light source of the patch indicator light to prevent light leakage between adjacent indicator lights.

[0007] Furthermore, the light-blocking feature is a protruding structure extending perpendicularly to the lower side of the liquid crystal bracket, and its height is adapted to the length of the light guide column to completely cover the light source emission path.

[0008] Furthermore, the cross section of the protruding structure is trapezoidal or rectangular, and the top of the protruding structure is tightly fitted with the bottom of the light guide column.

[0009] Furthermore, the light-blocking feature is integrally formed with the liquid crystal bracket and is made of light-proof engineering plastic.

[0010] Furthermore, the light-blocking features are distributed circumferentially along the light-guiding column to form an annular isolation area to block interference from lateral light sources.

[0011] Furthermore, the light-blocking features of the liquid crystal bracket correspond one-to-one to the positions of the patch indicator lights on the PCB board, and the spacing between the light-blocking features is smaller than the spacing between adjacent indicator lights.

[0012] Furthermore, the light-blocking feature has a thickness of 0.5-1.2 mm and a height of 2-4 mm to ensure mechanical strength and light-blocking effect.

[0013] Furthermore, the liquid crystal bracket is fixed to the watch cover via a snap-fit ​​structure, and the light-shielding feature is automatically aligned with the light-guiding column during installation.

[0014] Furthermore, the light-blocking characteristic surface is provided with a frosted layer for further scattering residual light.

[0015] Furthermore, the structure does not require additional light-shielding parts, and the light-shielding feature realizes the light-shielding function while supporting the liquid crystal display component.

[0016] Beneficial effects of the utility model:

[0017] 1. Accurate anti-interference: intercept light from the bottom of the light source to avoid light leakage from the indicator light and ensure accurate status display.

[0018] 2. Structural optimization: small light-blocking feature, integrated with the LCD bracket, rational use of space and enhanced stability.

[0019] 3. Low cost: No additional parts and manual installation are required, and the cost advantage is outstanding during large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model has the following drawings:

[0021] Figure 1 The utility model device structure diagram.

[0022] Among them, 1. Table cover 2. Light guide column 3. LCD bracket 4. Light blocking feature 5. PCB board DETAILED DESCRIPTION

[0023] In order to make the purpose, advantages and features of the present invention more obvious, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Embodiment 1:

[0025] An anti-interference structure for an indicator light of an electric energy meter comprises a meter cover 1, a meter bottom, a liquid crystal bracket 3, a light guide column 2 and a PCB board 5. A light-blocking feature 4 is integrated on the lower side of the liquid crystal bracket 3. The light-blocking feature 4 is used to intercept the light source of the patch indicator light and prevent light from crossing between adjacent indicator lights. The light-blocking feature 4 is a raised structure extending perpendicularly to the lower side of the liquid crystal bracket, and its height is adapted to the length of the light guide column 2 to completely cover the light source exit path. The cross-section of the raised structure is a trapezoid or a rectangle, and its top is tightly fitted with the bottom of the light guide column. The light-blocking feature 4 is integrally formed with the liquid crystal bracket 3 and is made of opaque engineering plastic. The light-blocking feature 4 is distributed circumferentially along the light guide column 2 to form an annular isolation area to block lateral light source interference. The light-blocking feature 4 of the liquid crystal bracket 3 corresponds one-to-one to the position of the patch indicator light on the PCB board 5, and the spacing of the light-blocking feature 4 is smaller than the spacing between adjacent indicator lights.

[0026] Embodiment 2:

[0027] In order to ensure mechanical strength and shading effect, the thickness of the light-shielding feature 4 is preferably set to 0.5-1.2 mm, and the height is set to 2-4 mm. The liquid crystal bracket 3 is detachably connected to the watch cover 1, such as being fixed to the watch cover 1 by a snap structure, and the light-shielding feature 4 is automatically aligned with the light guide column 2 during installation.

[0028] The surface of the light-blocking feature 4 may be provided with a frosted layer or blackened to further scatter the residual light.

[0029] The structure of the utility model does not require additional shading parts, and the light-blocking feature realizes the shading function while supporting the liquid crystal display component. Specifically, the utility model can effectively prevent interference: by utilizing the light-blocking feature on the lower side of the liquid crystal bracket to intercept light from the bottom of the light source, it can effectively prevent signal light source interference between patch indicator lights and mutual light leakage caused by too long light guide columns. Compared with the traditional method of adding a light-blocking wall or adding shading parts through the meter cover, the light-blocking effect is better. This enables the indicator light of the electric energy meter to more accurately display the operating status of each function of the meter, avoids status judgment errors caused by light leakage, ensures that users and operation and maintenance personnel can make correct decisions based on the status of the indicator light, and improves the accuracy and reliability of the use of the electric energy meter.

[0030] Structural optimization: As part of the LCD bracket, the light-blocking feature has a small structural feature and does not occupy too much extra space. In the case of a compact structure of the electric energy meter, this design makes full use of the internal space and makes the overall structure more reasonable. In addition, the light-blocking feature is combined with the LCD bracket to enhance the structural strength of the LCD bracket, which plays a role in shading while supporting the LCD screen, realizing the integration of structure and function and improving the overall stability of the electric energy meter.

[0031] Cost reduction: Compared with the traditional method of adding shading parts, the utility model does not need to add additional parts, which reduces the material procurement cost. At the same time, since there is no need to install additional parts, it saves labor costs and installation time, improves production efficiency, and the cost advantage will be more obvious in large-scale production, which will help reduce the overall production cost of the electric energy meter and enhance the competitiveness of the product in the market.

[0032] Simplified production process: In actual production, the light-blocking wall added to the cover is prone to deformation and gaps, resulting in installation interference or light leakage, affecting product quality and production efficiency. The utility model avoids these production difficulties, simplifies the production process, reduces the scrap rate in the production process, and is conducive to improving the production quality and consistency of the product, and ensuring the production efficiency of the enterprise.

[0033] The above embodiments describe the technical solution of the present invention in detail. Obviously, the present invention is not limited to the described embodiments. Based on the embodiments in the present invention, people familiar with the technical field can also make various changes accordingly, but any changes that are equivalent or similar to the present invention belong to the scope of protection of the present invention.

[0034] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. An anti-interference structure for an electric energy meter indicator light, comprising a meter cover, a meter bottom, a liquid crystal bracket, a light guide column and a PCB board, characterized in that: A light-blocking feature is integrated on the lower side of the liquid crystal bracket, and the light-blocking feature is used to intercept the light source of the patch indicator light to prevent light from crossing between adjacent indicator lights.

2. The anti-interference structure of the indicator light of an electric energy meter according to claim 1, characterized in that: The light-blocking feature is a protruding structure extending perpendicularly to the lower side of the liquid crystal bracket, and its height is adapted to the length of the light guide column to completely cover the light source emission path.

3. The anti-interference structure of the indicator light of an electric energy meter according to claim 2, characterized in that: The cross section of the protruding structure is trapezoidal or rectangular, and the top of the protruding structure is tightly fitted with the bottom of the light guide column.

4. The anti-interference structure of the indicator light of an electric energy meter according to claim 1, characterized in that: The light-blocking feature is integrally formed with the liquid crystal bracket and is made of light-proof engineering plastic.

5. The anti-interference structure of the indicator light of an electric energy meter according to claim 1, characterized in that: The light blocking features are distributed along the circumference of the light guide column to form an annular isolation area to block interference from lateral light sources.

6. The anti-interference structure of the indicator light of an electric energy meter according to claim 5, characterized in that: The light-blocking features of the liquid crystal bracket correspond one-to-one to the positions of the patch indicator lights on the PCB board, and the spacing between the light-blocking features is smaller than the spacing between adjacent indicator lights.

7. The anti-interference structure of the indicator light of an electric energy meter according to claim 6, characterized in that: The light-blocking feature has a thickness of 0.5-1.2 mm and a height of 2-4 mm to ensure mechanical strength and light-blocking effect.

8. The anti-interference structure of the indicator light of an electric energy meter according to claim 1, characterized in that: The liquid crystal bracket is fixed to the watch cover via a snap-fit ​​structure, and the light-shielding feature is automatically aligned with the light-guiding column during installation.

9. The anti-interference structure of the indicator light of an electric energy meter according to claim 1, characterized in that: The light-blocking characteristic surface is provided with a frosted layer for further scattering residual light.

10. An anti-interference structure for an indicator light of an electric energy meter according to any one of claims 1 to 9, characterized in that: The structure does not require additional light-shielding parts, and the light-shielding feature realizes the light-shielding function while supporting the liquid crystal display component.

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