CN213472455U

CN213472455U - Composite liner structure for eliminating top print of rear cover of mobile phone

Info

Publication number: CN213472455U
Application number: CN202022260109.2U
Authority: CN
Inventors: 王方敏
Original assignee: Dongguan Guangmai Electronic Technology Co ltd
Current assignee: Dongguan Guangmai Electronic Technology Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-06-18
Anticipated expiration: 2030-10-12

Abstract

The utility model provides a composite liner structure for eliminating top printing of a mobile phone rear cover, which comprises a substrate layer, wherein the substrate layer is made of PP, PET or PC material with the thickness of 5-30 μm; a silica gel layer which is formed on the surface of the base material layer and has the thickness of 0.03-1 mm; the self-adhesive silica gel layer is adhered to the foam layer with the thickness of 0.1-0.6 mm on the surface; and the adhesive layer is arranged on the surface of the foam layer. The base material layer is in abutting contact with the surfaces of the devices and the battery, the base material layer can disperse compressive stress generated when the protruding devices and the battery expand, and the creep action of the silica gel layer can effectively dissolve the compressive stress, so that the deformation of the explosion-proof membrane is avoided; the foam layer can absorb the thickness difference generated by the expansion of the battery, so that the top print after the battery expands in the later period is avoided; the glue layer is directly bonded with the rear cover of the mobile phone, so that the displacement of the liner can be prevented, and abnormal sound caused by a gap existing in the rear cover of the mobile phone can be avoided; the silica gel layer is formed on the surface of the base material layer and is attached to the foam layer through self-adhesion, and extra glue distribution is not needed.

Description

Composite liner structure for eliminating top print of rear cover of mobile phone

Technical Field

The utility model relates to an electronic product liner material technical field specifically indicates a compound liner structure of lid top seal behind elimination cell-phone.

Background

For the mobile phone rear cover made of glass or composite film, the rear cover material is strong in brittleness and high in light transmittance, and in order to prevent the brittle glass or composite film from breaking and scattering and reduce the light transmittance of the rear cover, an explosion-proof film is usually attached to the inner surface of the rear cover to protect the internal components of the mobile phone. As the mobile phone is lighter and thinner and the internal devices are arranged very closely, after the mobile phone is assembled completely, when the surfaces of the internal devices of the mobile phone are not flat due to slight bulges, the top surfaces of the devices can be abutted against and contacted with the explosion-proof membrane, so that the explosion-proof membrane is deformed, and the deformation is easy to form a 'top white' mark on the rear cover of the mobile phone by mirror surface imaging, and the mark is called as top mark. On the other hand, the lithium ion battery of the mobile phone slightly expands in the using process, and a top printing phenomenon with fuzzy boundaries is formed on the rear cover of the mobile phone, so that the attractiveness and the user experience of the mobile phone are seriously affected by the top printing phenomenon.

In the past, foam pad materials are filled between a mobile phone rear cover and a device or a battery to absorb unevenness or expansion when the mobile phone structure is designed, but for a glass or composite film mobile phone rear cover, due to the fact that compression rebound force of foam is small, compression stress generated by a protruding device of a mobile phone cannot be completely relieved, viscoelastic solid silica gel with a base material can solve the problem of top print generated by the protruding device, but the solid silica gel material does not support high compression, so the compression stress generated by battery expansion can still jack the mobile phone rear cover, a gap is reserved between the mobile phone rear cover and the battery, and abnormal sound of the mobile phone rear cover can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a both can eliminate the top seal that protruding device brought, can prevent the top seal that the battery inflation brought again, can not lead to the composite liner structure of lid abnormal sound again behind the cell-phone simultaneously.

In order to achieve the above object, the utility model adopts the following technical scheme:

a composite liner structure for eliminating top print of a rear cover of a mobile phone comprises a base material layer for abutting against devices inside the mobile phone, wherein the base material layer is a flexible film material which is made of PP (polypropylene), PET (polyester resin) or PC (polycarbonate) and has the thickness of 5-30 mu m; a silica gel layer which is formed on the other side surface of the substrate layer and has the thickness of 0.03-1 mm; the foam layer with the thickness of 0.1-0.6 mm is adhered to the other side surface of the silica gel layer through the self-adhesion of the silica gel layer; and the adhesive layer is arranged on the other side surface of the foam layer and is used for being attached to the anti-explosion film of the rear cover of the mobile phone.

In one scheme, the foam layer is formed by foaming and molding polyurethane, PP (polypropylene) or melamine materials.

According to one scheme, the silica gel layer is directly formed on the surface of the base material layer in a curing forming mode.

In one scheme, the thickness of the adhesive layer acrylic pressure-sensitive adhesive is 5-25 μm.

The beneficial effect of this scheme is: the substrate layer is in abutting contact with the surfaces of the devices and the battery, the substrate layer is a flexible membrane material, so that the compressive stress generated when the protruding devices and the battery expand can be dispersed on the surface of the whole substrate layer, and the creep action of the silica gel layer can effectively dissolve the compressive stress, so that the deformation of the explosion-proof membrane is avoided, and the aim of eliminating the top print can be achieved; the foam layer supports high compression, can absorb the thickness difference generated by battery expansion, and avoids top printing after the battery expansion in the later period; the glue layer is directly bonded with the rear cover of the mobile phone, so that the displacement of the liner can be prevented, and abnormal sound caused by a gap existing in the rear cover of the mobile phone can be avoided; the silica gel layer is formed on the surface of the base material layer and is attached to the foam layer through self-adhesion, extra glue distribution is not needed, the cost can be saved, and the aging after the glue distribution can be avoided.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of a layered structure of a composite mat structure according to an embodiment.

Detailed Description

The invention is further explained below with reference to the drawings:

referring to fig. 1, the composite gasket structure for eliminating the top print of the rear cover of the mobile phone comprises a substrate layer 1 for abutting against a device 7 inside the mobile phone, wherein the substrate layer 1 is a flexible film material made of PP, PET or PC material and having a thickness of 5-30 μm, and has a supporting effect on the whole gasket material; directly forming the silica gel layer 2 with the thickness of 0.03-1 mm on the other side surface of the substrate layer 1 in a curing and forming mode, wherein the curing and forming mode is to coat liquid silica gel on the surface of the substrate layer 1, and then, carrying out high-temperature vulcanization forming to obtain a solid material after forming; the foam layer 3 with the thickness of 0.1-0.6 mm is adhered to the other side surface of the silica gel layer 2 through the self-adhesion of the silica gel layer 2, the foam layer 3 is formed by foaming and molding polyurethane, PP or melamine materials, the foam layer 3 is in a flexible porous structure after foaming and molding, the compressibility is strong, and the cut foam sheet is directly adhered to the surface of the silica gel layer 2; and the adhesive layer 4 is arranged on the other side surface of the foam layer 3 and is used for being attached to the anti-explosion film 6 of the mobile phone rear cover 5, the adhesive layer 4 is acrylic pressure-sensitive adhesive, and the thickness of the adhesive layer is 5-25 microns.

The substrate layer 1 is in abutting contact with the surfaces of the devices 7 and the battery 8, the substrate layer 1 is a flexible membrane material, so that compressive stress generated when the protruding devices 7 and the battery 8 expand can be dispersed on the surface of the whole substrate layer 1, and the creep action of the silica gel layer 2 can effectively dissolve the compressive stress, so that the explosion-proof membrane 6 is prevented from deforming, and the purpose of eliminating the top print can be achieved; the foam layer 3 supports high compression, can absorb the thickness difference generated by the expansion of the battery 8 and avoids the occurrence of top printing after the expansion of the battery 8 in the later period; the adhesive layer 4 is directly bonded with the explosion-proof membrane 6 of the mobile phone rear cover 5, so that the displacement of the gasket can be prevented, and abnormal sound caused by a gap existing in the mobile phone rear cover 5 can be avoided; silica gel layer 2 shaping is in 1 surface of substrate layer and through autohension and the laminating of the cotton layer 3 of bubble, need not extra cloth and glues, can save the cost, also can avoid cloth to glue the back ageing.

The above description is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A composite liner structure for eliminating top printing of a rear cover of a mobile phone is characterized by comprising a base material layer for abutting against devices in the mobile phone, wherein the base material layer is a flexible film material which is made of PP (polypropylene), PET (polyethylene terephthalate) or PC (polycarbonate) and has the thickness of 5-30 mu m; a silica gel layer which is formed on the other side surface of the substrate layer and has the thickness of 0.03-1 mm; the foam layer with the thickness of 0.1-0.6 mm is adhered to the other side surface of the silica gel layer through the self-adhesion of the silica gel layer; and the adhesive layer is arranged on the other side surface of the foam layer and is used for being attached to the anti-explosion film of the rear cover of the mobile phone.

2. The composite liner structure for eliminating the top print of the back cover of the mobile phone as claimed in claim 1, wherein the foam layer is formed by foaming polyurethane, PP or melamine material.

3. The composite liner structure for eliminating the top print of the back cover of the mobile phone as claimed in claim 1, wherein the silicone layer is directly formed on the surface of the substrate layer by curing and forming.

4. The composite liner structure for eliminating the top print of the back cover of the mobile phone as claimed in claim 1, wherein the adhesive layer is an acrylic pressure sensitive adhesive with a thickness of 5-25 μm.