CN220210661U

CN220210661U - FPC structure of metal reinforcement pressfitting shielding film

Info

Publication number: CN220210661U
Application number: CN202321267337.XU
Authority: CN
Inventors: 陈少棉; 王德维; 吴伟佳
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-12-19
Anticipated expiration: 2033-05-23

Abstract

The utility model discloses an FPC structure of a metal reinforced laminated shielding film, which comprises an FPC, a shielding film and a reinforcing plate, wherein one end of the shielding film is arranged between the reinforcing plate and the FPC, one end of the upper surface of the shielding film is mutually abutted with the lower surface of the reinforcing plate, the lower surface of the shielding film and the upper surface of the FPC are mutually adhered through a first double-sided adhesive layer, and the reinforcing plate is laminated with the shielding film and is fixedly connected with the FPC. Namely, a shielding film is arranged between the reinforcing plate and the FPC, one end of the shielding film is firmly pressed in the FPC by the reinforcing plate, so that the situation that the shielding film cannot be flatly attached to the reinforcing plate and the FPC due to the height difference of the reinforcing plate and the FPC is avoided, the shielding film is uniformly stressed in the attaching process, the structure is stable, the risk of cracking is reduced, the yield of the FPC is improved, and the sales of products is increased.

Description

FPC structure of metal reinforcement pressfitting shielding film

Technical Field

The utility model relates to the field of FPC structures, in particular to an FPC structure of a metal reinforced pressing shielding film.

Background

With the development of modern science and technology, various electronic devices are called out to market, so that the life of human beings is more and more convenient, electronic components are also developing toward miniaturization, light weight and high density integration according to the demands of people, and new forms of mobile phones such as folding screens, scroll screens and the like are also developed to increase the visible area of the mobile phone. However, such precise products are susceptible to malfunction, message error, image obstruction, sound obstruction, etc. due to external electromagnetic interference.

The connector with shielding performance has the advantages that the front surface of the connector is required to be provided with metal reinforcement corresponding to the design requirement of the FPC, the shielding film is required to be covered with the metal reinforcement (as shown in figure I), when the shielding film is pressed, unevenness can be generated due to the difference of the reinforcement steps, the problem of cracking of the shielding film is caused, the yield of the FPC is reduced, and therefore the problem of non-plasticity of the product is caused, and the sales of brands is influenced.

As disclosed in chinese patent (CN 209821558U), a backlight module is disclosed, which includes a lower iron frame, a double-sided adhesive, an FPC and a shielding film that are sequentially stacked from top to bottom, wherein the upper surface of the shielding film has an adhesive property, and the edge of the shielding film exceeds the edges of the double-sided adhesive and the FPC. Namely, after the lower iron frame and the FPC are adhered and fixed through double-sided adhesion, a layer of shielding film is covered on the lower surface of the FPC, and as the edge of the shielding film exceeds the edges of the double-sided adhesion and the FPC, the edge of the shielding film can be adhered on the lower surface of the lower iron frame, so that the shielding film is conducted with the lower iron frame, the FPC is further fixed through double-sided adhesion, and the FPC is further reinforced and fixed after being adhered through the shielding film, the FPC can be firmly adhered on the lower iron frame, the FPC can have shielding capability, the anti-interference function is realized, the reliability is higher, and the product competitiveness is further improved.

However, when the present inventors embodied this device, the following drawbacks were found to exist: the shielding film is directly covered on the reinforcing plate and cannot be flatly attached, so that the risk of cracking the shielding film can occur.

Disclosure of Invention

Based on the above, it is necessary to provide an FPC structure with a metal reinforced lamination shielding film, in which the shielding film is directly covered on the reinforcing plate in the conventional lamination manner, and the step is caused because of the ready height difference between the reinforcing plate and the FPC, so that the shielding film cannot be laminated to the reinforcing plate smoothly, and the technical problem that the shielding film is broken due to uneven reinforcement step when the shielding film is laminated is solved.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a FPC structure of metal reinforced press-fit shielding film.

The FPC structure of the metal reinforcement lamination shielding film specifically comprises:

FPC, shielding film and stiffening plate, the one end setting of shielding film is in the stiffening plate with between the FPC, the one end of shielding film's upper surface with the lower surface of stiffening plate butt each other, the lower surface of shielding film with FPC's upper surface bonds each other through first double-sided adhesive layer, the stiffening plate pressfitting shielding film just with FPC fixed connection.

As a preferable implementation mode of the FPC structure of the metal reinforced press-fit shielding film, the thickness of the reinforcing plate is 0.1-1.6 mm.

As a preferable implementation mode of the FPC structure of the metal reinforced press-fit shielding film, the material of the reinforcing plate is FR4, PI or stainless steel.

As a preferred implementation mode of the FPC structure of the metal reinforcement pressing shielding film, the whole surface of the first double-sided adhesive layer is arranged on one surface of the FPC, the first double-sided adhesive layer adopts an acrylic resin adhesive, a polyurethane resin adhesive or a silicone resin adhesive, and the peeling strength of the first double-sided adhesive layer is 10-30 g/25mm.

As a preferable embodiment of the FPC structure of the metal reinforced press-fit shielding film, the thickness of the shielding film is 20-55 μm.

As a preferred implementation mode of the FPC structure of the metal reinforcement pressing shielding film, the FPC structure of the metal reinforcement pressing shielding film further comprises an insulating film, wherein the insulating film covers the upper surface of the shielding film, and the insulating film exceeds the edge of the shielding film.

As a preferred embodiment of the metal reinforced press-fit shielding film FPC structure provided by the utility model, the insulating film exceeds the edge of the shielding film by 1mm.

As a preferred embodiment of the FPC structure of the metal-reinforced laminated shielding film provided by the present utility model, the insulating film and the shielding film are bonded by a second double-sided adhesive layer.

As a preferable implementation mode of the FPC structure of the metal reinforcement pressing shielding film, the insulating film is a polymer insulating film.

As a preferable implementation mode of the FPC structure of the metal reinforcement pressing shielding film, a reinforcing plate is arranged on the back surface of one end of the FPC, and diamond reticulate knurling is arranged on the outer surface of the reinforcing plate.

Compared with the prior art, the utility model has the following beneficial effects:

according to the FPC structure of the metal reinforced pressing shielding film, the shielding film is arranged between the reinforcing plate and the FPC, one end of the shielding film is firmly pressed in the FPC by the reinforcing plate, so that the situation that the shielding film cannot be flatly attached to the reinforcing plate and the FPC due to the height difference of the reinforcing plate and the FPC is avoided, the shielding film is uniformly stressed in the attaching process, the structure is stable, the risk of breakage is reduced, the yield of the FPC is improved, and the sales of products is increased.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural view of an FPC structure of the metal reinforced press-fit shielding film provided by the utility model;

fig. 3 is a partial enlarged view at fig. 2A.

The labels in the figures are illustrated below:

FPC1, shielding film 2, reinforcing plate 3, first double-sided adhesive layer 4, insulating film 5, second double-sided adhesive layer 6, reinforcing plate 7.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As in the background art, the shielding film 2 is directly covered on the reinforcing plate 3 and is not attached flatly, so that there is a risk that the shielding film 2 breaks.

In order to solve the technical problem, the utility model provides an FPC1 structure of a metal reinforced lamination shielding film 2.

Specifically, referring to fig. 2-3, the FPC1 structure of the metal reinforcing press-fit shielding film 2 specifically includes:

FPC1, shielding film 2 and stiffening plate 3, the one end setting of shielding film 2 is between stiffening plate 3 and FPC1, and the one end of the upper surface of shielding film 2 and the lower surface mutual butt of stiffening plate 3, the lower surface of shielding film 2 and the upper surface of FPC1 bond each other through first double-sided adhesive layer 4, and stiffening plate 3 pressfitting shielding film 2 just with FPC1 fixed connection.

According to the FPC1 structure of the metal reinforced laminated shielding film 2, the shielding film 2 is arranged between the reinforcing plate 3 and the FPC1, and one end of the shielding film 2 is firmly pressed in the FPC1 by the reinforcing plate 3, so that the situation that the shielding film 2 cannot be flatly attached to the reinforcing plate 3 and the FPC1 due to the height difference between the reinforcing plate 3 and the FPC1 is avoided, the shielding film 2 is uniformly stressed in the attaching process, the structure is stable, the risk of cracking is reduced, the yield of the FPC1 is improved, and the sales of products is increased.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Example 1

Referring to fig. 2-3, an FPC1 structure with a metal reinforced laminated shielding film 2 includes an FPC1, a shielding film 2 and a reinforcing plate 3, wherein one end of the shielding film 2 is disposed between the reinforcing plate 3 and the FPC1, one end of the upper surface of the shielding film 2 is abutted against the lower surface of the reinforcing plate 3, the lower surface of the shielding film 2 and the upper surface of the FPC1 are adhered to each other by a first double-sided adhesive layer 4, and the reinforcing plate 3 is laminated with the shielding film 2 and fixedly connected with the FPC 1.

Through the structural design, the reinforcing plate 3 of the FPC1 is attached to a certain position or area of the flexible circuit board of the FPC1 to increase the thickness, the reinforcing steel sheet on the back of a golden finger is used for increasing the hardness and the thickness of the golden finger to facilitate plugging, meanwhile, the shielding film 2 is adhered to the surface of the FPC1 because the FPC1 can generate electromagnetic breaking to influence mobile phone signals during operation, the shielding film 2 has the electromagnetic signal shielding effect, so the shielding film 2 is arranged between the reinforcing plate 3 and the FPC1, one end of the shielding film 2 is firmly pressed in the FPC1 by the reinforcing plate 3, so that the shielding film 2 cannot be flatly attached to the reinforcing plate 3 and the FPC1 due to the height difference between the reinforcing plate 3 and the FPC1, the stress of the shielding film 2 is uniform in the attaching process, the structure is stable, the risk of breakage is reduced, the yield of the FPC1 is improved, and the product sales is increased.

Specifically, the thickness of the reinforcing plate 3 is 0.1 to 1.6mm.

Through the above structural design, in the present embodiment, the thickness of the reinforcing plate 3 is 0.5mm, and other thickness dimensions in the range of 0.1 to 1.6mm may be used according to different requirements.

Specifically, the material of the reinforcing plate 3 is FR4, PI or stainless steel.

Through above-mentioned structural design, in this embodiment, the material of stiffening plate 3 is the stainless steel, according to the demand of difference, stiffening plate 3 also can be at FR4, PI or stainless steel within range's material, set up shielding film 2 between stiffening plate 3 and FPC1, the one end of shielding film 2 is firmly compressed tightly in FPC1 by stiffening plate 3, thereby avoid shielding film 2 can't be leveled laminating on stiffening plate 3 and FPC1 because of stiffening plate 3 and FPC 1's difference in height, make shielding film 2 atress even in laminating process, stable in structure, thereby reduce the risk of breaking, the yield of FPC1 has been improved, make the product sales increase.

Specifically, the whole surface of the first double-sided adhesive layer 4 is arranged on one surface of the FPC1, the first double-sided adhesive layer 4 adopts an acrylic resin adhesive, a polyurethane resin adhesive or a silicone resin adhesive, and the peeling strength of the first double-sided adhesive layer 4 is 10-30 g/25mm.

Through the above structural design, the first double-sided adhesive layer 4 is used for bonding the shielding film 2 and the FPC1, and in this embodiment, the first double-sided adhesive layer 4 is made of a silicone resin adhesive, and the peel strength of the first double-sided adhesive layer 4 is 10g/25mm.

Specifically, the thickness of the shielding film 2 is 20 μm to 55 μm.

Through the above-mentioned structural design, in this embodiment, the thickness of shielding film 2 is 20 mu m, according to different demands, also can be in other thickness sizes in 20 mu m ~ 55 mu m within range, set up shielding film 2 between stiffening plate 3 and FPC1, the one end of shielding film 2 is firmly compressed tightly in FPC1 by stiffening plate 3, thereby avoid shielding film 2 can't be leveled and laminated on stiffening plate 3 and FPC1 because of stiffening plate 3 and FPC 1's difference in height, make shielding film 2 atress even in laminating process, stable in structure, thereby reduced the risk of breaking, improved FPC 1's yield, make the product sales increase.

Example 2

The structure of the FPC1 provided with the metal reinforced laminated shielding film 2 in embodiment 1 is further optimized, specifically, as shown in fig. 2-3, the structure of the FPC1 with the metal reinforced laminated shielding film 2 further includes an insulating film 5, the insulating film 5 covers the upper surface of the shielding film 2, and the insulating film 5 exceeds the edge of the shielding film 2.

Specifically, the insulating film 5 exceeds the edge of the shielding film 2 by 1mm.

Through the above-mentioned structural design, insulating film 5 is used for insulating FPC 1's static, and insulating film 5 is polyimide film and has good high low temperature resistance, electrical insulation nature, cohesiveness, radiation resistance, resistant dielectric nature, in order to can carry out more comprehensive insulation to static, insulating film 5 can cover shielding film 2's edge entirely.

Specifically, the insulating film 5 and the shielding film 2 are bonded by the second double-sided adhesive layer 6.

Through above-mentioned structural design, second double-sided adhesive layer 6 is used for bonding insulating film 5 and shielding film 2, and insulating film 5 is last, and shielding film 2 sets up shielding film 2 under between stiffening plate 3 and FPC1, and the one end of shielding film 2 is firmly compressed tightly in FPC1 by stiffening plate 3 to avoid shielding film 2 can't smooth laminating on stiffening plate 3 and FPC1 because of the difference in height of stiffening plate 3 and FPC1, make shielding film 2 atress even in the laminating process, stable in structure, thereby reduced the risk of breaking, improved FPC 1's yield, make the product sales volume increase.

Example 3

The structure of the FPC1 for the metal-reinforced laminated shielding film 2 provided in example 1 or 2 is further optimized, and as shown in fig. 2 to 3, the insulating film 5 is a polymer insulating film.

Through above-mentioned structural design, insulating film 5 is polyimide film, has good antistatic effect, and middle organic insulating layer adopts polyimide, and both sides are the heat conduction layer, can insulate FPC1 static that produces, prevents that FPC1 static from producing from destroying other electronic components inside the cell-phone.

Specifically, a reinforcing plate 7 is arranged on the back surface of one end of the FPC1, and diamond reticulate knurling is arranged on the outer surface of the reinforcing plate.

Through above-mentioned structural design, set up shielding film 2 between stiffening plate 3 and FPC1, shielding film 2's one end is firmly compressed tightly in FPC1 by stiffening plate 3, thereby avoid shielding film 2 can't level and smooth laminating on stiffening plate 3 and FPC1 because of the difference in height of stiffening plate 3 and FPC1, make shielding film 2 atress even in the laminating process, stable in structure, thereby reduce cracked risk, the yield of FPC1 has been improved, the product sales volume increases, diamond reticulation annular knurl that the surface of stiffening plate 7 set up, can pull out more easily when being used for pulling out FPC1, reduce the cracked risk of FPC1 circuit.

The FPC1 structure of the metal reinforced lamination shielding film 2 provided by the utility model has the following using process:

set up shielding film 2 between stiffening plate 3 and FPC1, shielding film 2's one end is firmly compressed tightly in FPC1 by stiffening plate 3 to avoid shielding film 2 to be unable to laminate smoothly on stiffening plate 3 and FPC1 because of the difference in height of stiffening plate 3 and FPC1, make shielding film 2 atress even in the laminating process, stable in structure, thereby reduced the risk of breaking, improved FPC 1's yield, make the product sales volume increase.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims

1. The utility model provides a FPC structure of metal reinforcement pressfitting shielding film, its characterized in that, it includes FPC (1), shielding film (2) and stiffening plate (3), the one end setting of shielding film (2) is in stiffening plate (3) with between FPC (1), the one end of the upper surface of shielding film (2) with the lower surface mutual butt of stiffening plate (3), the lower surface of shielding film (2) with the upper surface of FPC (1) bonds each other through first double-sided adhesive layer (4), stiffening plate (3) pressfitting shielding film (2) and with FPC (1) fixed connection.

2. The FPC structure of the metal-reinforced laminated shielding film according to claim 1, characterized in that the thickness of the reinforcing plate (3) is 0.1 to 1.6mm.

3. The FPC structure of the metal-reinforced laminated shielding film according to claim 2, characterized in that the material of the reinforcing plate (3) is FR4, PI or stainless steel.

4. The FPC structure of a metal-reinforced laminated shielding film according to claim 3, wherein the first double-sided adhesive layer (4) is disposed on one side of the FPC (1) entirely, the first double-sided adhesive layer (4) is an acrylic resin adhesive, a polyurethane resin adhesive or a silicone resin adhesive, and the peel strength of the first double-sided adhesive layer (4) is 10-30 g/25mm.

5. The FPC structure of the metal-reinforced laminated shielding film according to claim 4, characterized in that the thickness of the shielding film (2) is 20 μm to 55 μm.

6. The FPC structure of a metal-reinforced laminated shielding film according to claim 1, further comprising an insulating film (5), wherein the insulating film (5) covers the upper surface of the shielding film (2), and the insulating film (5) extends beyond the edge of the shielding film (2).

7. The FPC structure of the metal-reinforced laminated shielding film according to claim 6, characterized in that the insulating film (5) exceeds the edge of the shielding film (2) by 1mm.

8. The FPC structure of the metal-reinforced laminated shielding film according to claim 7, characterized in that the insulating film (5) and the shielding film (2) are bonded by a second double-sided adhesive layer (6).

9. The FPC structure of the metal-reinforced laminated shielding film according to claim 8, wherein the insulating film (5) is a polymer insulating film.

10. The FPC structure of the metal reinforcement press-fit shielding film according to claim 1, wherein a reinforcing plate (7) is arranged on the back surface of one end of the FPC (1), and diamond-shaped reticulate knurls are arranged on the outer surface of the reinforcing plate (7).