CN113038812A

CN113038812A - Electromagnetic shielding film

Info

Publication number: CN113038812A
Application number: CN202110220451.6A
Authority: CN
Inventors: 喻琼; 喻南
Original assignee: Dongguan Jinhengsheng New Material Technology Co Ltd
Current assignee: Dongguan Jinhengsheng New Material Technology Co Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-06-25
Anticipated expiration: 2041-02-26
Also published as: CN113038812B

Abstract

The invention discloses an electromagnetic shielding film, relates to the field of electromagnetic shielding films, and aims to solve the problems that the existing electromagnetic shielding film in the prior art cannot have enough strength in use and is easy to damage if a circuit board is extruded. One side of first electromagnetic shielding film and second electromagnetic shielding film all is provided with the shielding film breach, just spacing connecting block before the opposite side of first electromagnetic shielding film and second electromagnetic shielding film all is provided with, the connecting block linking arm is installed to one side of preceding spacing connecting block, just preceding spacing connecting block is provided with a plurality of, a plurality of spacing mouth before all being provided with between the preceding spacing connecting block, the inside of first electromagnetic shielding film and second electromagnetic shielding film is provided with the opening, the opening is provided with a plurality of, a plurality of open-ended both sides all are provided with easily tears the scale mark, the outside of first electromagnetic shielding film and second electromagnetic shielding film is provided with flexible strip.

Description

Electromagnetic shielding film

Technical Field

The invention relates to the technical field of electromagnetic shielding films, in particular to an electromagnetic shielding film.

Background

The electromagnetic compatibility (EMC) is a abbreviation that an electronic device does not interfere with other devices and is not influenced by other devices. Electromagnetic compatibility, as well as safety, is one of the most important indicators of product quality. Security relates to personal and property, while electromagnetic compatibility relates to personal and environmental protection. Interference of electronic components to the outside, called EMI; the electromagnetic wave interacts with the electronic components to generate an interference phenomenon called EMS. For example, the "snow" that is often observed on TV screens indicates that the received signal is disturbed. Electromagnetic shielding in a certain region of the space, means for reducing the field strength caused by certain sources. In most cases, the shield can be made of metal such as copper, aluminum, steel, etc., but for constant and very low frequency magnetic fields, materials such as ferrite can also be used as the shield. Electromagnetic noise or interference is often generated in one system or between different systems to cause system performance deterioration, so that it is required to confine electric power lines or magnetic force lines within a certain area; so that a certain area is not influenced by external electric lines of force and magnetic lines of force.

With the increasing density of flexible circuit board wiring circuits, the requirement on the electromagnetic shielding film is higher and higher, and the electromagnetic shielding film with the shielding effectiveness larger than 60db is favored by the market. The shielding effectiveness has a direct relationship with the conduction, and the smaller the conduction value, the higher the shielding effectiveness. However, the existing electromagnetic shielding film cannot have enough strength in use, and if the circuit board is extruded, the electromagnetic shielding film is easy to damage; therefore, the market is urgently needed to develop an electromagnetic shielding film to help people to solve the existing problems.

Disclosure of Invention

The present invention is directed to an electromagnetic shielding film, which solves the problems that the conventional electromagnetic shielding film proposed in the background art cannot have sufficient strength during use, and the electromagnetic shielding film is easily damaged if a circuit board is pressed.

In order to achieve the purpose, the invention provides the following technical scheme: an electromagnetic shielding film comprises a first electromagnetic shielding film and a second electromagnetic shielding film, wherein one side of the first electromagnetic shielding film and one side of the second electromagnetic shielding film are both provided with a shielding film notch, the other side of the first electromagnetic shielding film and the other side of the second electromagnetic shielding film are both provided with front limit connecting blocks, one side of each front limit connecting block is provided with a connecting block connecting arm, the front limit connecting blocks are provided with a plurality of front limit ports, front limit ports are arranged between the front limit connecting blocks, the inside of the first electromagnetic shielding film and the inside of the second electromagnetic shielding film are provided with openings, the openings are provided with a plurality of openings, both sides of the openings are provided with easily-torn scale marks, the outside of the first electromagnetic shielding film and the outside of the second electromagnetic shielding film are provided with telescopic strips, the telescopic strips are provided with a plurality of openings, and the inner wall of each opening is provided with a, and an electromagnetic shielding film main body is arranged in the reinforcing frame body.

Preferably, the position that shielding film breach and position and preceding spacing connecting block and connecting block linking arm corresponding, preceding spacing connecting block and connecting block linking arm all set up structure as an organic whole with first electromagnetic shielding film and second electromagnetic shielding film.

Preferably, the front limit connecting block and the connecting block connecting arm of the second electromagnetic shielding film are embedded into the shielding film notch of the first electromagnetic shielding film and are clamped with the first electromagnetic shielding film, and the front limit opening of the second electromagnetic shielding film is clamped with the first electromagnetic shielding film.

Preferably, the both sides of stating flexible strip all are provided with the limiting plate, the inside and the first electromagnetic shielding film fixed connection of first electromagnetic shielding film are gone into to the limiting plate card, just one side of limiting plate is provided with multilayer cardboard and multilayer draw-in groove, multilayer cardboard and multilayer draw-in groove set up structure as an organic whole with the limiting plate, the internally mounted of multilayer cardboard and multilayer draw-in groove has the spliced pole, the both ends of spliced pole run through the multilayer cardboard and extend to the inside and enhancement framework fixed connection of enhancement framework.

Preferably, the position that first electromagnetic shielding film easily torn the scale mark is the same with the position that second electromagnetic shielding film easily torn the scale mark, just easily tear the scale mark and set up structure as an organic whole with first electromagnetic shielding film and second electromagnetic shielding film.

Preferably, the first electromagnetic shielding film and the second electromagnetic shielding film both comprise a wear-resistant protective layer, a nanometer ultraviolet light protective film is arranged on the lower end face of the wear-resistant protective layer, the nanometer ultraviolet light protective film is in adhesive connection with the wear-resistant protective layer, a conductive polymer layer is arranged on the lower end face of the nanometer ultraviolet light protective film, the nanometer ultraviolet light protective film is in adhesive connection with the conductive polymer layer, a printing ink insulating layer is arranged on the lower end face of the conductive polymer layer, the printing ink insulating layer is in adhesive connection with the conductive polymer layer, an aluminum foil anticorrosive layer is arranged on the lower end face of the printing ink insulating layer, the aluminum foil anticorrosive layer is in welded connection with the printing ink insulating layer, an aluminum-magnesium alloy hard net is arranged on the lower end face of the aluminum foil anticorrosive layer, the aluminum-magnesium alloy hard net is in welded connection with the aluminum, the lower end face of the conductive glue layer is provided with easy-to-tear oilpaper, and the conductive glue layer is respectively bonded and connected with the easy-to-tear oilpaper and the aluminum-magnesium alloy hard net.

Preferably, flexible strip includes side link and main link, the side link is provided with two, two the side link is located the both sides of main link, just be provided with the non-woven fabrics flitch between main link and the side link, the inside of non-woven fabrics flitch is provided with the silica gel cushion layer, silica gel cushion layer and non-woven fabrics flitch fixed connection, just the both ends of non-woven fabrics flitch extend to the inside and side link and the main link sliding connection of side link and main link respectively, just the both ends of non-woven fabrics flitch all are provided with the flitch limiting plate, the flitch limiting plate inlays the inside and side link and the main link block of side link and main link.

Preferably, a connecting block clamping block is installed at the lower end of the front limiting connecting block, the connecting block clamping block is provided with a plurality of reinforcing connecting plates, reinforcing connecting plates are installed between the connecting block clamping blocks and are fixedly connected with the front limiting connecting block, a wear-resistant cushion layer is arranged on the lower end face of the connecting block clamping block, an insulating rubber block and a bamboo carbon block are installed inside the connecting block connecting arm, and the bamboo carbon block and the insulating rubber block are both connected with the connecting block connecting arm in an adhesion mode.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention can adjust and change the length and width of the first electromagnetic shielding film and the second electromagnetic shielding film according to different requirements when in use by arranging the front limit connecting block and the connecting block connecting arm, the first electromagnetic shielding film and the second electromagnetic shielding film can be connected by a plurality of front limit connecting blocks and the connecting block connecting arms, so that the length of the first electromagnetic shielding film and the second electromagnetic shielding film can be adjusted, then the openings can be cut by matching with the easily torn scale lines through a plurality of openings, the positions of the openings can be adjusted by matching with the easily torn scale lines, the length position needing to be pasted can be measured, the working effect is improved, the function is strong, the structure is simple, the use is convenient, the integral strength of the connecting block connecting arm can be improved by a plurality of insulating rubber blocks and bamboo carbon blocks adopted in the connecting arm of the connecting block, and the connecting block connecting arm has certain toughness, when the first electromagnetic shielding film and the second electromagnetic shielding film are stretched, can make the connecting block linking arm possess certain intensity and tensile properties to can improve the holistic attached effect of mould, simple structure, overall stability is high, has improved the adaptability to different operational environment.

2. According to the invention, through the arrangement of the telescopic strip, when the electromagnetic shielding film sticking device is used, when the first electromagnetic shielding film and the second electromagnetic shielding film are stuck, in order to keep the whole surfaces of the first electromagnetic shielding film and the second electromagnetic shielding film tight, the first electromagnetic shielding film and the second electromagnetic shielding film can be stretched, after the telescopic strip is stressed integrally, the inner silica gel soft cushion layer is stretched in the non-woven fabric flitch, and the two ends of the non-woven fabric flitch are supported and limited by the flitch limiting plates and the side connecting frames, so that the whole adaptability of the first electromagnetic shielding film and the second electromagnetic shielding film can be improved, the strength is improved, and the whole stability is kept.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is an internal structural view of the present invention;

FIG. 3 is a side view of a portion of the present invention;

FIG. 4 is a schematic view of the construction of the telescoping strap of the present invention;

FIG. 5 is an overall front view of the front stop block of the present invention.

In the figure: 1. a first electromagnetic shielding film; 2. a second electromagnetic shielding film; 3. a shielding film notch; 4. a front limiting connecting block; 5. the connecting arm of the connecting block; 6. a front limiting port; 7. connecting a block fixture; 8. a telescoping strap; 9. a reinforcement frame body; 10. an opening; 11. easy-to-tear scale marks; 12. an electromagnetic shielding film main body; 13. a limiting plate; 14. a multilayer cardboard; 15. a plurality of layers of card slots; 16. connecting columns; 17. a wear-resistant protective layer; 18. a nano ultraviolet light protective film; 19. a conductive polymer layer; 20. an ink insulating layer; 21. an aluminum foil anticorrosive layer; 22. an aluminum magnesium alloy hard mesh; 23. a conductive glue layer; 24. the oiled paper is uncovered; 25. a side link; 26. a main connecting frame; 27. a silica gel cushion layer; 28. sticking a non-woven fabric plate; 29. pasting a plate limiting plate; 30. a wear-resistant cushion layer; 31. reinforcing the connecting plate; 32. an insulating rubber block; 33. bamboo charcoal blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, an embodiment of the present invention is shown: an electromagnetic shielding film comprises a first electromagnetic shielding film 1 and a second electromagnetic shielding film 2, wherein one side of each of the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 is provided with a shielding film notch 3, the other side of each of the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 is provided with a front limiting connecting block 4, one side of each of the front limiting connecting blocks 4 is provided with a connecting block connecting arm 5, a plurality of front limiting connecting blocks 4 are arranged, front limiting ports 6 are arranged among the front limiting connecting blocks 4, openings 10 are arranged inside the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2, the openings 10 are provided with a plurality of openings, both sides of the openings 10 are provided with easy-to-tear scale marks 11, telescopic strips 8 are arranged outside the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2, the telescopic strips 8 are provided with a plurality of openings, and the inner wall of each opening 10 is provided with a reinforcing frame body 9, and strengthen the inside of framework 9 and be provided with electromagnetic shielding film main part 12, when tensile first electromagnetic shielding film 1 and second electromagnetic shielding film 2, can make connecting block linking arm 5 possess certain intensity and tensile properties to can improve the holistic attached effect of mould, simple structure, overall stability is high, has improved the adaptability to different operational environment.

Further, the position that shielding film breach 3 and position and preceding spacing connecting block 4 and connecting block linking arm 5 are corresponding, preceding spacing connecting block 4 and connecting block linking arm 5 all set up to a body structure with first electromagnetic shielding film 1 and second electromagnetic shielding film 2, and first electromagnetic shielding film 1 and second electromagnetic shielding film 2 are connected to a plurality of preceding spacing connecting blocks 4 of accessible and connecting block linking arm 5 to can adjust the length of first electromagnetic shielding film 1 and second electromagnetic shielding film 2.

Further, the front limit connecting block 4 and the connecting block connecting arm 5 of the second electromagnetic shielding film 2 are embedded into the shielding film notch 3 of the first electromagnetic shielding film 1 and are clamped with the first electromagnetic shielding film 1, and the front limit opening 6 of the second electromagnetic shielding film 2 is clamped with the first electromagnetic shielding film 1, so that the length and the width of the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 can be adjusted and changed according to different requirements.

Furthermore, both sides of the retractable strip 8 are provided with a limiting plate 13, the limiting plate 13 is clamped into the interior of the first electromagnetic shielding film 1 and is fixedly connected with the first electromagnetic shielding film 1, one side of the limiting plate 13 is provided with a multilayer clamping plate 14 and a multilayer clamping groove 15, the multilayer clamping plate 14, the multilayer clamping groove 15 and the limiting plate 13 are arranged into an integral structure, a connecting column 16 is arranged inside the multilayer clamping plate 14 and the multilayer clamping groove 15, both ends of the connecting column 16 penetrate through the multilayer clamping plate 14 and extend to the interior of the reinforcing frame 9 and are fixedly connected with the reinforcing frame 9, the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 can be stretched, after the retractable strip 8 is integrally stressed, the inner silica gel cushion layer 27 is retracted in the non-woven fabric pasting plate 28, both ends of the non-woven pasting plate 28 are supported and limited by the pasting plate limiting plate 29 and the side connecting frame 25, so that the overall adaptability of the, the strength is improved and the whole stability is kept.

Further, first electromagnetic shield membrane 1 easily tears the position of scale mark 11 the same with second electromagnetic shield membrane 2 easily tears the position of scale mark 11, and easily tears scale mark 11 and first electromagnetic shield membrane 1 and second electromagnetic shield membrane 2 and set up structure as an organic whole, not only can adjust opening 10 position through easily tearing scale mark 11, still can measure the length position that needs were pasted, improves working effect, and is functional strong, simple structure, convenient to use.

Further, the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 both include a wear-resistant protective layer 17, a nano ultraviolet light protective film 18 is disposed on a lower end surface of the wear-resistant protective layer 17, the nano ultraviolet light protective film 18 is bonded to the wear-resistant protective layer 17, a conductive polymer layer 19 is disposed on a lower end surface of the nano ultraviolet light protective film 18, the nano ultraviolet light protective film 18 is bonded to the conductive polymer layer 19, an ink insulating layer 20 is disposed on a lower end surface of the conductive polymer layer 19, the ink insulating layer 20 is bonded to the conductive polymer layer 19, an aluminum foil anticorrosive layer 21 is disposed on a lower end surface of the ink insulating layer 20, the aluminum foil anticorrosive layer 21 is welded to the ink insulating layer 20, an aluminum-magnesium alloy hard mesh 22 is disposed on a lower end surface of the aluminum foil anticorrosive layer 21, the aluminum-magnesium alloy hard mesh 22 is welded to the aluminum foil anticorrosive layer 21, lower terminal surface of conductive adhesive layer 23 is provided with and just takes off oiled paper 24, conductive adhesive layer 23 respectively with just take off oiled paper 24 and almag net 22 bonding connection firmly, through the effectual anti ability of tearing that has improved the electromagnetic shielding membrane body of almag net 22, prevent that the staff from damaging at the too big electromagnetic shielding membrane body when pasting in-process dynamics, the effectual staff of being convenient for of the difficult adhesion dust of printing ink insulating layer 20 cleans electromagnetic shielding membrane body surface, inside the air gets into the electromagnetic shielding membrane body from the bleeder vent, nanometer ultraviolet ray protection film 18 protects the light, reduce the light damage die body, in the conductive polymer layer 19, can make gas release the quality that the outside improved the air of conductive polymer layer 19 through the bleeder vent.

Further, the retractable strip 8 comprises a side connection frame 25 and a main connection frame 26, the side connection frame 25 is provided with two, the two side connection frames 25 are positioned at two sides of the main connection frame 26, a non-woven fabric flitch 28 is arranged between the main connection frame 26 and the side connection frame 25, a silica gel cushion layer 27 is arranged inside the non-woven fabric flitch 28, the silica gel cushion layer 27 is fixedly connected with the non-woven fabric flitch 28, two ends of the non-woven fabric flitch 28 respectively extend to the insides of the side connection frame 25 and the main connection frame 26 to be slidably connected with the side connection frame 25 and the main connection frame 26, flitch limiting plates 29 are arranged at two ends of the non-woven fabric flitch 28, the flitch limiting plates 29 are embedded into the insides of the side connection frame 25 and the main connection frame 26 to be clamped with the side connection frame 25 and the main connection frame 26, two ends of the non-woven fabric flitch 28 are supported and limited by the side connection frame 25 through the flitch limiting plates 29, so as to improve, the strength is improved and the integral stability is kept.

Further, connecting block fixture block 7 is installed to preceding spacing connecting block 4's lower extreme, connecting block fixture block 7 is provided with a plurality of, all install connection strengthening plate 31 between a plurality of connecting block fixture block 7, connection strengthening plate 31 and preceding spacing connecting block 4 fixed connection, and the lower terminal surface of connecting block fixture block 7 is provided with wear-resisting bed course 30, the internally mounted of connecting block linking arm 5 has insulating rubber piece 32 and bamboo charcoal piece 33, bamboo charcoal piece 33 and insulating rubber piece 32 all with connecting block linking arm 5 adhesive bonding connection, a plurality of insulating rubber pieces 32 and the holistic intensity of connecting block linking arm 5 can be improved to bamboo charcoal piece 33 that connecting block linking arm 5's inside adopted, and can possess certain toughness, when tensile first electromagnetic shielding membrane 1 and second electromagnetic shielding membrane 2, can make connecting block linking arm 5 possess certain intensity and tensile property, thereby can improve the holistic attached effect of mould.

The working principle is as follows: when the electromagnetic shielding connecting arm is used, the length and the width of the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 can be adjusted and changed according to different requirements, the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 can be connected through the front limiting connecting blocks 4 and the connecting block connecting arms 5, so that the length of the first electromagnetic shielding film 1 and the length of the second electromagnetic shielding film 2 can be adjusted, the openings 10 can be cut by matching with the easy-tearing scale marks 11 through the plurality of openings 10, the positions of the openings 10 can be adjusted through the easy-tearing scale marks 11, the length positions needing to be pasted can be measured, the working effect is improved, the function is strong, the structure is simple, the use is convenient, the strength of the whole connecting block connecting arm 5 can be improved by the insulating rubber blocks 32 and the bamboo carbon blocks 33 adopted in the connecting block connecting arm 5, and certain toughness of electromagnetic shielding can be realized, when the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 are stretched, the connecting block connecting arm 5 can have certain strength and tensile property, so that the overall attaching effect of the die can be improved, the structure is simple, the overall stability is high, the adaptability to different working environments is improved, the oiled paper 24 is easy to tear and is attached, the anti-tearing capacity of the electromagnetic shielding film body is effectively improved through the aluminum-magnesium alloy hard net 22, the electromagnetic shielding film body is prevented from being damaged when the force is too great in the attaching process of a worker, the printing ink insulating layer 20 is not easy to adhere dust, the worker can effectively clean the surface of the electromagnetic shielding film body conveniently, air enters the electromagnetic shielding film body from the air holes, the nanometer ultraviolet light protective film 18 protects light, the light damage die body is reduced, in the conductive polymer layer 19, gas can be released out of the conductive polymer layer 19 through the air holes to improve the quality of the air, and when the first electromagnetic shielding film 1 and the second electromagnetic shielding film 2 are attached, in order to keep the whole surface of first electromagnetic shielding film 1 and second electromagnetic shielding film 2 tight, can stretch first electromagnetic shielding film 1 and second electromagnetic shielding film 2, flexible strip 8 is whole atress after, inside silica gel cushion 27 is flexible in non-woven fabrics flitch 28, it is spacing that flitch limiting plate 29 and side link 25 are passed through to the both ends of non-woven fabrics flitch 28 support, thereby can improve the whole adaptability of first electromagnetic shielding film 1 and second electromagnetic shielding film 2, keep overall stability when improving intensity.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. An electro-magnetic shielding film comprising a first electro-magnetic shielding film (1) and a second electro-magnetic shielding film (2), characterized in that: one side of each of the first electromagnetic shielding film (1) and the second electromagnetic shielding film (2) is provided with a shielding film notch (3), the other side of each of the first electromagnetic shielding film (1) and the second electromagnetic shielding film (2) is provided with a front limiting connecting block (4), one side of each of the front limiting connecting blocks (4) is provided with a connecting block connecting arm (5), the front limiting connecting blocks (4) are provided with a plurality of front limiting ports (6), front limiting ports (6) are arranged between the front limiting connecting blocks (4), openings (10) are formed in the first electromagnetic shielding film (1) and the second electromagnetic shielding film (2), the openings (10) are provided with a plurality of openings, the two sides of the openings (10) are provided with easy-tearing scale marks (11), and telescopic strips (8) are arranged outside the first electromagnetic shielding film (1) and the second electromagnetic shielding film (2), the telescopic strip (8) is provided with a plurality of reinforcing frames (9), and the inner wall of the opening (10) is provided with an electromagnetic shielding film main body (12).

2. The electromagnetic shielding film according to claim 1, wherein: the position that shielding film breach (3) and position and preceding spacing connecting block (4) and connecting block linking arm (5) are corresponding, preceding spacing connecting block (4) and connecting block linking arm (5) all set up structure as an organic whole with first electromagnetic shielding film (1) and second electromagnetic shielding film (2).

3. The electromagnetic shielding film according to claim 1, wherein: preceding spacing connecting block (4) and connecting block linking arm (5) of second electromagnetic shielding membrane (2) imbed inside shielding film breach (3) and the block of first electromagnetic shielding membrane (1), just preceding spacing mouth (6) and the block of first electromagnetic shielding membrane (1) of second electromagnetic shielding membrane (2).

4. The electromagnetic shielding film according to claim 1, wherein: the both sides of flexible strip (8) all are provided with limiting plate (13), the inside and first electromagnetic shielding membrane (1) fixed connection of first electromagnetic shielding membrane (1) are gone into to limiting plate (13) card, just one side of limiting plate (13) is provided with multilayer cardboard (14) and multilayer draw-in groove (15), multilayer cardboard (14) and multilayer draw-in groove (15) set up structure as an organic whole with limiting plate (13), the internally mounted of multilayer cardboard (14) and multilayer draw-in groove (15) has spliced pole (16), the both ends of spliced pole (16) are run through multilayer cardboard (14) and are extended to strengthening inside and strengthening framework (9) fixed connection of framework (9).

5. The electromagnetic shielding film according to claim 1, wherein: the position that first electromagnetic shield membrane (1) easily torn scale mark (11) is the same with the position that second electromagnetic shield membrane (2) easily torn scale mark (11), just easily tear scale mark (11) and set up to structure as an organic whole with first electromagnetic shield membrane (1) and second electromagnetic shield membrane (2).

6. The electromagnetic shielding film according to claim 1, wherein: first electromagnetic shield membrane (1) and second electromagnetic shield membrane (2) all include wear-resisting protective layer (17), the lower terminal surface of wear-resisting protective layer (17) is provided with nanometer ultraviolet protection film (18), nanometer ultraviolet protection film (18) and wear-resisting protective layer (17) adhesive connection, just the lower terminal surface of nanometer ultraviolet protection film (18) is provided with conducting polymer layer (19), nanometer ultraviolet protection film (18) and conducting polymer layer (19) adhesive connection, the lower terminal surface of conducting polymer layer (19) is provided with printing ink insulating layer (20), printing ink insulating layer (20) and conducting polymer layer (19) adhesive connection, just the lower terminal surface of printing ink insulating layer (20) is provided with aluminium foil anticorrosive coating (21), aluminium foil anticorrosive coating (21) and printing ink insulating layer (20) welded connection, just the lower terminal surface of aluminium foil anticorrosive coating (21) is provided with aluminium magnesium alloy hard net (22), aluminium magnesium alloy hard mesh (22) and aluminium foil anticorrosive coating (21) welded connection, just the lower terminal surface of aluminium magnesium alloy hard mesh (22) is provided with electrically conductive glue layer (23), the lower terminal surface of electrically conductive glue layer (23) is provided with and just takes off oiled paper (24), electrically conductive glue layer (23) respectively with just take off oiled paper (24) and aluminium magnesium alloy hard mesh (22) adhesive connection.

7. The electromagnetic shielding film according to claim 1, wherein: the telescopic strap (8) comprises a side connecting frame (25) and a main connecting frame (26), the number of the side connecting frames (25) is two, the two side connecting frames (25) are positioned at two sides of the main connecting frame (26), a non-woven fabric flitch plate (28) is arranged between the main connecting frame (26) and the side connecting frame (25), a silica gel soft cushion layer (27) is arranged inside the non-woven fabric flitch (28), the silica gel soft cushion layer (27) is fixedly connected with the non-woven fabric flitch (28), and the two ends of the non-woven fabric flitch (28) respectively extend to the inner parts of the side connecting frame (25) and the main connecting frame (26) to be connected with the side connecting frame (25) and the main connecting frame (26) in a sliding way, and both ends of the non-woven fabric flitch (28) are provided with flitch limit plates (29), the flitch limiting plate (29) is embedded into the side connecting frame (25) and the main connecting frame (26) and is clamped with the side connecting frame (25) and the main connecting frame (26).

8. The electromagnetic shielding film according to claim 1, wherein: connecting block fixture block (7) are installed to the lower extreme of preceding spacing connecting block (4), connecting block fixture block (7) are provided with a plurality of, a plurality of reinforcing connecting plate (31) all are installed between connecting block fixture block (7), reinforcing connecting plate (31) and preceding spacing connecting block (4) fixed connection, just the lower terminal surface of connecting block fixture block (7) is provided with wear pad layer (30), the internally mounted of connecting block linking arm (5) has insulating rubber piece (32) and bamboo charcoal piece (33), bamboo charcoal piece (33) and insulating rubber piece (32) all are connected with connecting block linking arm (5) bonding.