Paper-plastic environment-friendly rear shell of liquid crystal display television

Abstract

The utility model relates to a liquid crystal display television paper-plastic environment-friendly rear shell, which is characterized in that the upper side and the lower side of the paper-plastic rear shell are respectively provided with sound heat dissipation holes arranged in an array, and the sound heat dissipation holes are formed through blanking; a back power outlet hole is formed in the middle of the paper-plastic rear shell; the lower part of the paper-plastic rear shell is provided with a loudspeaker locking hole; screw locking holes are respectively formed in four top corners of the paper-plastic rear shell; the periphery of the horn locking hole and the periphery of the screw locking hole are each provided with a step groove, and one side of each step groove is provided with an opening. And the periphery of the back power supply hole is provided with a sunken groove with a closed periphery. According to the utility model, the paper-plastic rear shell is adopted, and the structure is optimized and improved, so that the paper-plastic rear shell has enough strength, the mechanical reliability is ensured, the conversion from the plastic rear shell to the paper-plastic rear shell is realized, and the environmental protection property is improved.

Description

Technical Field

[0001] This utility model relates to the field of LCD TV technology, specifically to an environmentally friendly paper-plastic back cover for LCD TVs. Background Technology

[0002] As a crucial component of the overall structure, the material selection and design of the back cover of an LCD TV directly impacts its performance, appearance, and environmental attributes. Currently, high-end LCD TVs mostly use metal or glass for their back covers, while mid-to-low-end products commonly use plastic. However, with increasing global environmental awareness, the non-degradability and environmental pollution problems of traditional plastic back covers are becoming increasingly prominent. Therefore, developing an environmentally friendly LCD TV back cover has become an urgent technical challenge in this field. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an environmentally friendly paper-plastic back cover for LCD TVs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An environmentally friendly paper-plastic back cover for an LCD TV includes a paper-plastic back cover, wherein the upper and lower sides of the paper-plastic back cover are respectively provided with an array of sound heat dissipation holes, and the sound heat dissipation holes are formed by punching.

[0006] The paper-plastic back cover has a power outlet hole in the middle.

[0007] The lower part of the paper-plastic back cover is provided with a horn-shaped locking hole;

[0008] The paper-plastic back cover is provided with screw mounting holes at the four top corners;

[0009] The periphery of the horn locking hole and the screw locking hole is provided with a stepped groove on one side.

[0010] The power outlet hole is surrounded by a recessed groove that is closed on all four sides.

[0011] Furthermore, the groove walls of the stepped groove and the sunken groove are provided with a draft angle of 3 to 6 degrees.

[0012] Furthermore, the top periphery of the sunken groove and the stepped groove are respectively provided with a radius R, which is greater than or equal to 4mm.

[0013] Furthermore, the width of the paper-plastic edge of the sound heat dissipation hole is 1.3 times the diameter of the sound heat dissipation hole.

[0014] Furthermore, the side of the paper-plastic back cover is provided with a side-out terminal hole.

[0015] Furthermore, the lower ends of the paper-plastic back cover are respectively provided with connection holes for connecting the adapter bracket.

[0016] Furthermore, the paper-plastic back cover has a 2mm wide rough edge around its perimeter.

[0017] Furthermore, the cross-sectional thickness of the paper-plastic back cover is 1.2 mm.

[0018] The above-mentioned technical solution has the following beneficial technical effects: This utility model adopts a paper-plastic back shell, and through structural optimization and improvement, the paper-plastic back shell has sufficient strength to ensure mechanical reliability, thereby realizing the transformation from plastic back shell to paper-plastic back shell and improving environmental protection. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 A schematic diagram of the array of sound heat dissipation holes;

[0022] Figure 3 This is a schematic diagram showing the connection between the paper-plastic back cover and the connecting bracket. Detailed Implementation

[0023] Traditional television back covers are mostly made of plastic. Due to the molding characteristics of paper-plastic composites, the design of a plastic back cover cannot be directly used as the design of a paper-plastic back cover. A series of design optimizations and innovations are required, as follows:

[0024] like Figure 1-3 As shown, this utility model discloses an environmentally friendly paper-plastic back cover for LCD TVs, including a paper-plastic back cover 1. To ensure the appearance of the LCD TV back cover, the paper-plastic back cover 1 is formed by wet pressing, resulting in good appearance quality. Since it is impossible to design reinforcing structures such as ribs inside or outside the back cover, the cross-sectional thickness of the paper-plastic back cover 1 is designed to be 1.2mm to ensure strength during use.

[0025] The paper-plastic back shell 1 will have uneven rough edges around its edges, which need to be trimmed to make the edges neat and smooth. Since the edges of the paper-plastic back shell 1 are not on the same plane, a rough edge with a width of 2mm is added around the edges of the paper-plastic back shell 1 to facilitate the subsequent flat cutting and ring cutting processing of the rough edges.

[0026] The upper and lower sides of the paper-plastic back shell 1 are respectively provided with sound heat dissipation holes 2 arranged in an array. The sound heat dissipation holes 2 of the paper-plastic back shell 1 cannot be directly formed, so the sound heat dissipation holes 2 are formed by punching later, and the shape is usually simple such as circle.

[0027] The side of the paper-plastic back cover 1 is provided with a side terminal hole 3;

[0028] The paper-plastic back cover 1 has a power outlet hole 4 in the middle;

[0029] The lower part of the paper-plastic back cover 1 is provided with a horn-locking hole 5;

[0030] The paper-plastic back cover 1 has screw mounting holes 6 at its four top corners;

[0031] The periphery of the horn locking hole 5 and the screw locking hole 6 is respectively provided with stepped grooves 51 and 61, one of which is open;

[0032] The power outlet 4 is surrounded by a recessed groove 41 that is closed on all four sides.

[0033] When demolding the paper-plastic back shell, the mold blank is wet. To ensure its smooth release from the mold and to guarantee the dimensional accuracy of the finished product to a certain extent, while reducing dimensional deviations caused by insufficient draft angle, the rounded corners and bevels of the paper-plastic back shell 1 need to be optimized. Specifically, a draft angle of 3 to 6 degrees is provided on the walls of the stepped groove 51 and the recessed groove 41. In addition, rounded corners (R-shaped) are provided on the top periphery of the recessed groove 41 and the stepped groove 51, as well as on other edges of the paper-plastic back shell 1 that require rounding. The radius of the rounded corners (R-shaped) is greater than or equal to 4 mm.

[0034] The openings in the plastic back cover are directly formed by molds, and the shapes and patterns are relatively rich and can be expressed in multiple layers. They need to be punched in the later stage. In terms of shape, they are usually circular patterns, and the expression is relatively simple.

[0035] To prevent the paper-plastic back cover 1 from cracking during processing and punching, the spacing of the sound-dissipating holes 2 on the paper-plastic back cover 1 is adjusted and increased, and the material between the holes is increased. The width of the paper-plastic at the edge of the sound-dissipating hole 2 is 1.3 times the diameter A of the sound-dissipating hole 2, and the number of holes is reduced. For example, if the diameter A of the sound-dissipating hole 2 on the upper side of the paper-plastic back cover 1 is 3.5mm, then the center distance between two adjacent sound-dissipating holes 2 on the upper side is 8mm; if the diameter A of the sound-dissipating hole 2 on the lower side of the paper-plastic back cover 1 is 2.9mm, then the center distance between two adjacent sound-dissipating holes 2 on the lower side is 6.7mm.

[0036] During the assembly of the television set, the back cover needs to be matched and fixed with components such as the speaker and the base. Traditional plastic back covers usually have internal structural support for fixation. However, the paper-plastic back cover 1 cannot be designed with ribs, studs, or other structures to directly fix and match with these components, requiring different designs. Plastic back covers typically have Boss studs directly designed for fixing and locking. The paper-plastic back cover 1 requires the addition of studs inside, which pass through the speaker and are then secured to the outside of the paper-plastic back cover 1 with screws to complete the speaker's fixation. In addition, the television speaker itself has a certain weight. To prevent the paper-plastic back cover 1 from denting when bearing the weight of the speaker, a stepped groove 51 with one open side is designed around the speaker mounting hole 5, which can reinforce the strength of the paper-plastic back cover to some extent. Furthermore, the screw mounting holes 6 also have stepped grooves 61 with one open side, and the power outlet hole 4 has a recessed groove 41 with all four sides closed. The purpose of these designs is to improve the strength of the connection and prevent denting.

[0037] Plastic back covers typically have Boss posts directly designed for fixing and locking. However, paper-plastic back covers 1 cannot directly add structural support, so an adapter bracket needs to be designed internally. The adapter bracket is fixed to the back plate, and the base is fixed to the adapter bracket to complete the base fixation. Therefore, connection holes 7 for connecting the adapter bracket 8 are designed at both ends of the lower side of the paper-plastic back cover 1.

[0038] The paper-plastic back cover of this utility model is formed using a wet pressing process. The specific method is as follows:

[0039] Mix bamboo pulp and sugarcane pulp at a mass ratio of 60:40, add 5‰ of the total mass of the bamboo pulp and sugarcane pulp mixture as a waterproofing agent, 2‰ of the total mass of the bamboo pulp and sugarcane pulp mixture as a hardening agent, and 30% of the total mass of the bamboo pulp and sugarcane pulp mixture as a halogen-free flame retardant (phosphorus or nitrogen compounds), and stir evenly to form a mixed pulp.

[0040] The mixed slurry is injected into the molding mold and shaped by hot pressing to form the initial blank of the back shell.

[0041] The initial blank of the rear shell is subjected to metal stamping, circumferential cutting, and die-cutting correction to obtain the final product.

[0042] Performance tests were conducted on the paper-plastic back cover of this invention:

[0043] Fire resistance test: The KLSUL94 glow wire tester was used for testing. The results showed that the back cover burned for 2 seconds after the first and second ignitions, and the afterglow time after the open flame was extinguished after the second ignition was 2 seconds, which meets the V0 fire resistance standard.

[0044] High temperature and high humidity test: The paper-plastic back cover was placed in an environment of 50℃ and 80%RH for 7 days, and no obvious deformation or cracking was observed.

[0045] High and low temperature cycling test: The paper-plastic back cover was cycled for 7 days in a temperature range of -10℃ to 60℃, and no physical changes were observed.

[0046] Freezing test: The paper-plastic back cover was placed in an environment of 25°C for 7 days, and no embrittlement or cracking was observed.

[0047] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A paper-plastic environmentally friendly back cover for LCD TVs, characterized in that: The device includes a paper-plastic back cover, wherein the upper and lower sides of the paper-plastic back cover are respectively provided with an array of sound heat dissipation holes, which are formed by punching. The paper-plastic back cover has a power outlet hole in the middle. The lower part of the paper-plastic back cover is provided with a horn-shaped locking hole; The paper-plastic back cover is provided with screw mounting holes at the four top corners; The periphery of the horn locking hole and the screw locking hole is provided with a stepped groove on one side. The power outlet hole is surrounded by a recessed groove that is closed on all four sides.

2. The paper-plastic environmentally friendly back cover for an LCD TV according to claim 1, characterized in that: The walls of the stepped groove and the sunken groove are provided with a draft angle of 3 to 6 degrees.

3. The paper-plastic environmentally friendly back cover for an LCD TV according to claim 1, characterized in that: The top perimeter of the sunken groove and the stepped groove are respectively provided with rounded corners (R), and the radius of the rounded corners is greater than or equal to 4mm.

4. The paper-plastic environmentally friendly back cover for an LCD TV according to claim 1, characterized in that: The width of the paper-plastic edge of the sound heat dissipation hole is 1.3 times the diameter of the sound heat dissipation hole.

5. The paper-plastic environmentally friendly back cover for an LCD TV according to claim 1, characterized in that: The paper-plastic back cover has a side terminal hole on its side.

6. The paper-plastic environmentally friendly back cover for an LCD TV according to claim 1, characterized in that: The lower two ends of the paper-plastic back cover are respectively provided with connection holes for connecting the adapter bracket.

7. The paper-plastic environmentally friendly back cover for an LCD TV according to claim 1, characterized in that: The paper-plastic back cover has a 2mm wide rough edge around its perimeter.

8. The paper-plastic environmentally friendly back cover for an LCD TV according to claim 1, characterized in that: The cross-sectional thickness of the paper-plastic back cover is 1.2 mm.

Images