Graphite cooling fin for preventing edge warping and applied to mobile phone

Abstract

The utility model discloses an anti-warping graphite radiating fin applied to a mobile phone, which relates to the technical field of mobile phone radiating, and comprises a plastic adhesive film, a protective film, a double-sided adhesive film I, a graphite sheet, a double-sided adhesive film II and a release film, the double-sided adhesive film I and the double-sided adhesive film II are arranged at two ends of the graphite sheet, the double-sided adhesive film I is arranged above the graphite sheet, and the double-sided adhesive film II is arranged above the graphite sheet. The first double-faced adhesive film is arranged above the graphite flake, the second double-faced adhesive film is arranged below the graphite flake, the protective film is arranged above the first double-faced adhesive film, the release film is arranged below the second double-faced adhesive film, and the shaping adhesive film is arranged on the periphery of the graphite flake. And meanwhile, the heat dissipation holes are formed in the side face of the shaping adhesive film and are of a honeycomb structure, so that the stability of the shaping adhesive film is guaranteed, and meanwhile, the heat dissipation effect between the graphite flake and the shaping adhesive film is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of mobile phone heat dissipation, and particularly relates to a graphite heat dissipation sheet for mobile phones that prevents warping. Background Technique

[0002] The most common heat dissipation sheet on the market is the graphite heat dissipation sheet. The graphite sheet is widely used due to its advantages such as high thermal conductivity, low thermal resistance, and light weight. The graphite sheet can conduct heat uniformly in two directions, thus realizing the function of rapid heat diffusion. It can also shield the heat source and components while improving the performance of electronic products. However, it still has the characteristics of being easy to break and poor toughness, and during the die-cutting process, its cutting edge is prone to powder falling, which affects the heat dissipation effect. Moreover, due to its conductivity, the graphite micro-powder falling from the edge of the graphite sheet may cause short circuits in electronic components, resulting in damage to the electronic components and corresponding equipment.

[0003] The Chinese patent with the publication number CN219032058U discloses a graphite heat dissipation sheet for mobile phones, which includes a protective film, a first double-sided adhesive, a graphite sheet, a black edge film, a second double-sided adhesive, and a release film. The protective film is divided into a strip-shaped upper part and a square lower part. The graphite sheet is adhered to the square lower part of the protective film through the first double-sided adhesive. The black edge film is arranged around the edge of the graphite sheet. The second double-sided adhesive is arranged above the graphite sheet and the black edge film, and the release film is arranged above the second double-sided adhesive. The length and width dimensions of the first double-sided adhesive are equal to or greater than those of the graphite sheet, and the length and width dimensions of the black edge film are equal to those of the first double-sided adhesive. It prevents powder falling by arranging the black edge film around the edge of the graphite sheet, and double-sided adhesives are adhered to both the upper and lower surfaces of the graphite sheet and the black edge film to play a role in fixing and adhesion, and its optimized structure has a better heat dissipation effect.

[0004] However, during the use process, due to the multi-film structure on the surface of the graphite sheet, after heating, it is easy to cause warping at the edge of the heat dissipation sheet, affecting the use of the graphite sheet. Content of the Utility Model

[0005] The present utility model provides a graphite heat dissipation sheet for mobile phones that prevents warping to solve the technical problems raised in the above background technique.

[0006] To solve the above technical problems, a graphite heat dissipation sheet for mobile phones that prevents warping provided by the present utility model includes a shaping plastic film, a protective film, a first double-sided adhesive film, a graphite sheet, a second double-sided adhesive film, and a release film. Double-sided adhesive films are arranged at both ends of the graphite sheet. The first double-sided adhesive film is arranged above the graphite sheet, the second double-sided adhesive film is arranged below the graphite sheet, the protective film is arranged above the first double-sided adhesive film, the release film is arranged below the second double-sided adhesive film, and the shaping plastic film is arranged around the graphite sheet.

[0007] Preferably, the shaping adhesive film is in a mouth shape, and the graphite sheet is coated on the inner side of the shaping adhesive film.

[0008] Preferably, the graphite sheet is provided with positioning grooves. There are two positioning grooves, which are respectively arranged on the upper surface and the lower surface of the graphite sheet. A positioning piece is fixedly installed on the inner side of the shaping adhesive film, and the positioning piece is clamped with the positioning groove.

[0009] Preferably, the outer ring of the shaping adhesive film is provided with heat dissipation holes. There are multiple heat dissipation holes, and the multiple heat dissipation holes are arranged in a honeycomb shape.

[0010] Preferably, the protective film is a matte black flame-retardant PC film.

[0011] Preferably, the release film is an HDPE film.

[0012] The utility model has the following advantages compared with the prior art:

[0013] For a graphite heat dissipation fin for mobile phones to prevent warping of the present utility model, first, positioning grooves are provided on the graphite sheet, and the positioning pieces on the inner side of the shaping adhesive film are clamped with the positioning grooves, which is convenient for positioning the shaping adhesive film. The shaping adhesive film is coated on the outer side of the graphite sheet, which can avoid the warping phenomenon of the edge position of the graphite sheet under high-temperature conditions. At the same time, heat dissipation holes are provided on the side surface of the shaping adhesive film, and the heat dissipation holes are in a honeycomb structure, which can ensure the heat dissipation effect between the graphite sheet and the shaping adhesive film while ensuring the stability of the shaping adhesive film. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural diagram of a graphite heat dissipation fin for mobile phones to prevent warping of the present utility model;

[0015] Figure 2 is a structural diagram of the graphite sheet in a graphite heat dissipation fin for mobile phones to prevent warping of the present utility model;

[0016] Figure 3 is an assembly structural diagram of the graphite sheet in a graphite heat dissipation fin for mobile phones to prevent warping of the present utility model;

[0017] Reference numerals in the drawings: 1, graphite sheet; 2, double-sided adhesive film 1; 3, protective film; 4, release film; 5, double-sided adhesive film 2; 6, shaping adhesive film; 7, positioning piece; 8, heat dissipation hole; 9, positioning groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Please refer to Figures 1-3, the utility model provides a technical solution: a graphite heat sink for mobile phones to prevent warping, including a shaping adhesive film 6, a protective film 3, a double-sided adhesive film 1 2, a graphite sheet 1, a double-sided adhesive film 2 5 and a release film 4. Double-sided adhesive films 1 2 and 2 5 are provided at both ends of the graphite sheet 1. The double-sided adhesive film 1 2 is arranged above the graphite sheet 1, and the double-sided adhesive film 2 5 is arranged below the graphite sheet 1. The protective film 3 is arranged above the double-sided adhesive film 1 2, the release film 4 is arranged below the double-sided adhesive film 2 5, and the shaping adhesive film 6 is arranged around the graphite sheet 1.

[0019] Further, the shaping adhesive film 6 is in a shape of a slit, and the graphite sheet 1 is covered inside the shaping adhesive film 6.

[0020] Further, the graphite sheet 1 is provided with two positioning grooves 9. The two positioning grooves 9 are respectively arranged on the upper surface and the lower surface of the graphite sheet 1. A positioning piece 7 is fixedly installed inside the shaping adhesive film 6, and the positioning piece 7 is clamped with the positioning groove 9.

[0021] Further, a plurality of heat dissipation holes 8 are provided on the outer ring of the shaping adhesive film 6. The plurality of heat dissipation holes 8 are arranged in a honeycomb shape.

[0022] Further, the protective film 3 is a matte black flame-retardant PC film.

[0023] Further, the release film 4 is an HDPE film.

[0024] Working principle:

[0025] First, positioning grooves 9 are provided on the graphite sheet 1. The positioning piece 7 inside the shaping adhesive film 6 is clamped with the positioning grooves 9, which is convenient for positioning the shaping adhesive film 6. The shaping adhesive film 6 covers the outside of the graphite sheet 1, which can avoid the warping phenomenon of the edge position of the graphite sheet 1 under high temperature conditions. At the same time, heat dissipation holes 8 are provided on the side of the shaping adhesive film 6, and the heat dissipation holes 8 are in a honeycomb structure, which can ensure the heat dissipation effect between the graphite sheet 1 and the shaping adhesive film 6 while ensuring the stability of the shaping adhesive film 6.

Claims

1. A graphite heat sink for mobile phones to prevent edge warping, comprising a shaping film (6), a protective film (3), a double-sided adhesive film (2), a graphite sheet (1), a double-sided adhesive film (5) and a release film (4), characterized in that: The two ends of the graphite sheet (1) are provided with a double-sided adhesive film 1 (2) and a double-sided adhesive film 2 (5); the double-sided adhesive film 1 (2) is arranged above the graphite sheet (1); the double-sided adhesive film 2 (5) is arranged below the graphite sheet (1); the protective film (3) is arranged above the double-sided adhesive film 1 (2); the release film (4) is arranged below the double-sided adhesive film 2 (5); and the shaping adhesive film (6) is arranged around the graphite sheet (1).

2. The graphite heat sink for mobile phone application for preventing edge warping according to claim 1, characterized in that: The plastic film (6) is in the shape of a hole, and the graphite sheet (1) is coated on the inner side of the plastic film (6).

3. The graphite heat sink for mobile phone application for preventing edge warping according to claim 1, characterized in that: The graphite sheet (1) is provided with a positioning groove (9), and two positioning grooves (9) are provided. The two positioning grooves (9) are arranged on the upper surface and the lower surface of the graphite sheet (1) respectively. A positioning piece (7) is fixedly installed on the inner side of the plastic film (6), and the positioning piece (7) is snap-connected with the positioning groove (9).

4. The graphite heat sink for mobile phone application for preventing edge warping according to claim 1, characterized in that: The annular outer side of the plastic film (6) is provided with a heat dissipation hole (8), and a plurality of the heat dissipation holes (8) are provided, and the plurality of heat dissipation holes (8) are arranged in a honeycomb shape.

5. The graphite heat sink for mobile phone application for preventing edge warping according to claim 1, characterized in that: The protective film (3) is a matte black flame-retardant PC film.

6. The graphite heat sink for mobile phone application for preventing edge warping according to claim 1, characterized in that: The release film (4) is a HDPE film.

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