CN113226005A

CN113226005A - Electromagnetic shielding box

Info

Publication number: CN113226005A
Application number: CN202110618176.3A
Authority: CN
Inventors: 郭子民; 石江鸿; 曹雁; 周琨
Original assignee: Shield Electronics Technologies Co ltd
Current assignee: Shield Electronics Technologies Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-08-06

Abstract

The invention belongs to the technical field of electromagnetic wave information protection, and particularly relates to an electromagnetic shielding box which comprises an electromagnetic shielding box cover and an electromagnetic shielding box body, wherein the electromagnetic shielding box cover is rotatably connected with the electromagnetic shielding box body through a right elliptic rotating shaft and a left elliptic rotating shaft, the side wall of the electromagnetic shielding box cover is connected with a cold-rolled steel plate stopper in a screwed mode, and the cold-rolled steel plate stopper limits the opening and closing angle of the electromagnetic shielding box cover. The gap between the box body and the box cover of the electromagnetic shielding box adopts a double-layer concave-convex structure with staggered height to realize the shielding function. The mounting height of the shielding material of the aluminum case and the cold-rolled steel case is required to form displacement difference and is not on the same horizontal plane, so that electromagnetic waves at the gap between the case body and the case cover can be effectively prevented from leaking, and a better shielding effect is achieved. Be beryllium copper reed with rivet is installed around electromagnetic shield case box and case lid, guarantees the electric continuity of shielding body.

Description

Electromagnetic shielding box

Technical Field

The invention belongs to the technical field of electromagnetic wave information protection, and particularly relates to an electromagnetic shielding box.

Background

With the acceleration of the informatization process, the application of information processing equipment is more and more extensive, and when the information processing equipment works, the information processing equipment can not only generate electromagnetic radiation, but also generate electromagnetic information leakage, so that confidential information is stolen and restored, and a divulgence event is caused. The common mobile portable electronic products such as notebook computers, printers, scanners and the like are light and miniaturized to become the mainstream products for daily mobile office work and information processing, but the electromagnetic protection level of the equipment is not high, a large amount of electromagnetic wave leakage is accompanied during work, the radiation frequency is from low frequency to high frequency, and the wave source is magnetic field wave, electric field wave and electromagnetic wave. Research shows that the electromagnetic wave emitted from the computer without electromagnetic shielding treatment may be received and reproduced in one kilometer away, and if the computer is used in tip receiving and decoding equipment, the maximum intercepted distance will be far away. Therefore, it is necessary to perform secondary protection on portable mobile electronic devices that cannot meet the requirement of electromagnetic shielding performance in a complex environment through a shielding box having the requirement of shielding performance.

Disclosure of Invention

Aiming at the technical problems, the invention provides the electromagnetic shielding box which is good in shielding effect, good in stability, good in heat dissipation and convenient to load and move.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides an electromagnetic shielding case, includes electromagnetic shielding case lid, electromagnetic shielding case box, the electromagnetic shielding case lid passes through right oval axis of rotation, the oval axis of rotation in a left side and rotates with the electromagnetic shielding case box to be connected, the lateral wall spiral shell dress of electromagnetic shielding case lid is connected with the cold-rolled steel sheet stopper, the cold-rolled steel sheet stopper restricts the angle that opens and shuts of electromagnetic shielding case lid.

The front surface of the electromagnetic shielding box body is provided with a cold air inlet, a USB aviation connector interface and a 220V power aviation connector interface, the front back surface of the electromagnetic shielding box body is provided with a hot air outlet, handles are arranged on two sides of the electromagnetic shielding box body, a power input filter, a data signal filter and a travel switch are arranged in the electromagnetic shielding box body, corner protectors are arranged on the periphery of the electromagnetic shielding box body, a travel switch cover is arranged outside the travel switch, the maximum opening and closing angle of the electromagnetic shielding box cover is 95 degrees, the 220V power aviation connector is connected onto the power input filter, one side of the power input filter is fixed onto the electromagnetic shielding box body, the other side of the power input filter is fixed onto a filter supporting block, and the USB aviation connector interface is connected onto the data signal filter, and the data signal filter is fixed on the box body of the electromagnetic shielding box.

Electromagnetic shield case lid includes aluminium system case lid, cold-rolled steel sheet system case lid, takes symmetrical type beryllium copper reed, travel switch mounting, the support bar of rivet, support bar spiral shell dress is fixed in on the inside lateral wall of aluminium system case lid, cold-rolled steel sheet system case lid border is equipped with the hem, the hem back overlap joint of cold-rolled steel sheet system case lid is on the support bar, the symmetrical type beryllium copper reed of taking the rivet is openly installed to the hem of cold-rolled steel sheet system case lid, aluminium system case lid and cold-rolled steel sheet system case lid spiral shell dress fixed connection, the spiral shell dress is fixed with the travel switch mounting on the aluminium system case lid, the on-off and the disconnected of circuit is realized through travel switch mounting and travel switch's extrusion during electromagnetic shield case lid lock.

The aluminium system case lid includes aluminum plate, connecting piece, aluminum plate has five, welds through the fixed back of connecting piece spiral shell dress between five aluminum plates, handle and snap hook are openly installed to the aluminium system case lid, the aluminium system case lid back is through three combination screw fixedly connected with elliptical hole pivot seats.

The electromagnetic shielding box body comprises an electromagnetic shielding box body front panel assembly, an electromagnetic shielding box body rear panel assembly and a cold-rolled steel plate U-shaped box body assembly, wherein the electromagnetic shielding box body front panel assembly, the electromagnetic shielding box body rear panel assembly are respectively arranged at the front end and the rear end of the cold-rolled steel plate U-shaped box body assembly, the electromagnetic shielding box body front panel assembly comprises an aluminum front panel, an aviation plug fixing plate, a cold-rolled steel plate front panel, a first longitudinal supporting strip, a first U-shaped supporting strip, an air inlet fan group, a fan decorating plate and a filter supporting block, one end of the first longitudinal supporting strip and one end of the first U-shaped supporting strip are fixed on the aluminum front panel through screws, the aviation plug fixing plate is fixed on the aluminum front panel through screws, and the other end of the first longitudinal supporting strip and the other end of the first U-shaped supporting strip are screwed on the cold-rolled steel plate front panel, the air inlet fan unit spiral shell dress is on cold-rolled steel sheet system front panel, fan decorative board spiral shell dress is on the air inlet fan unit, filter supporting shoe spiral shell dress is on cold-rolled steel sheet system front panel, be fixed with power input filter on the filter supporting shoe, electromagnetic shield box rear panel assembly includes aluminium system rear panel, cold-rolled steel sheet system rear panel, second longitudinal support strip, second U type support strip, air-out fan unit, power support, power, second fan decorative board, the one end of second longitudinal support strip, second U type support strip is passed through the fix with screw on aluminium system rear panel, the other end spiral shell dress of second longitudinal support strip, second U type support strip is on cold-rolled steel sheet system rear panel, air-out fan unit spiral shell dress is on cold-rolled steel sheet system rear panel, second fan decorative board spiral shell dress is on air-out fan unit, the power support is fixed on cold-rolled steel sheet system rear panel, the electromagnetic shielding box is characterized in that a power supply is fixed on the power supply support, a ventilation hole is formed in the electromagnetic shielding box body, the thickness of the ventilation hole is 5mm, the size of the ventilation hole is a round hole with the diameter of 2.5mm, and the hole interval of the ventilation hole is 10 mm.

The assembly of cold-rolled steel sheet system U type box includes aluminium system left side board, aluminium system right side board, third longitudinal support strip, fourth longitudinal support strip, transverse support strip, cold-rolled steel sheet system U type box, aluminium system bottom plate, sawtooth pattern beryllium copper reed, the aluminium system left side board passes through the third longitudinal support strip and is connected with one side of cold-rolled steel sheet system U type box, the aluminium system right side board passes through fourth longitudinal support strip, transverse support strip and is connected with the opposite side of cold-rolled steel sheet system U type box, the bottom at cold-rolled steel sheet system U type box is connected to the aluminium system bottom plate, the spiral shell dress is fixed after sawtooth pattern beryllium copper reed is pasted respectively to the contact surface between aluminium system left side board, aluminium system right side board, the aluminium system bottom plate.

The aluminum front panel, the aluminum rear panel, the aluminum left side plate and the aluminum right side plate are respectively provided with a groove, shielding materials are arranged in the grooves of the aluminum front panel, the aluminum rear panel, the aluminum left side plate and the aluminum right side plate, and the grooves of the aluminum front panel, the aluminum rear panel, the aluminum left side plate and the aluminum right side plate are provided with symmetrical beryllium copper reeds with rivets.

Fixedly connected with right pivot briquetting, left pivot briquetting on the electromagnetic shielding case box, right oval axis of rotation, left oval axis of rotation are fixed respectively on right pivot briquetting, left pivot briquetting, fixedly connected with elliptical hole pivot seat on the electromagnetic shielding case lid, right oval axis of rotation, left oval axis of rotation penetrate respectively in the elliptical hole pivot seat.

The electromagnetic shielding box body is externally provided with a draw-bar box and EPE pearl cotton, and each electromagnetic shielding box body is matched with an independent bar code.

The electromagnetic shielding box meets the requirements of class C of technical requirements and test methods of electromagnetic leakage emission shielding cabinets of BMB19-2006, and the electromagnetic shielding effectiveness of the electromagnetic shielding box is more than 50dB when the detection frequency is 14 kHz; the electromagnetic shielding effectiveness of the electromagnetic shielding box is more than 75dB when the detection frequency is 100 kHz; the electromagnetic shielding box has the electromagnetic shielding effectiveness of more than 90dB when the detection frequency is 1 MHz; the electromagnetic shielding box has the electromagnetic shielding effectiveness of more than 90dB when the detection frequency is 450 MHz; the electromagnetic shielding box has electromagnetic shielding effectiveness larger than 85dB when the detection frequency is 950 MHz.

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

1. aiming at the characteristics of different high-frequency and low-frequency electromagnetic waves, the electromagnetic shielding box provided by the invention has the advantages that the shielding efficiency is met by adopting the mutual lap joint of double-layer metal plates as the whole material. In order to prevent the interference of the low-frequency magnetic field, the shielding body adopts a cold-rolled steel plate with high magnetic permeability, low price and high mechanical strength to absorb or lose the electromagnetic field so as to achieve the purpose of shielding. In order to prevent the interference of high-frequency electromagnetic field, the shield body adopts aluminum plate with high conductivity, low resistance, low price and larger mechanical strength, and the aluminum plate is used for absorbing and reflecting the electromagnetic field to achieve the purpose of shielding.

2. The front ends of the box body and the box cover of the electromagnetic shielding box are locked by the anti-loosening hasp made of the cold-rolled steel plate band, the rear ends of the box body and the box cover are locked by the oval rotating structure, the electromagnetic shielding box realizes a locking function on the premise of screwing down without screws, a user can operate without tools, and meanwhile, a good shielding effect is achieved.

3. The rear end of the electromagnetic shielding box adopts an elliptical rotating structure, the hole of the rotating shaft seat and the left and right rotating shafts are designed to be elliptical, and the characteristics of the elliptical major and minor axes are fully utilized to realize the locking of the rear end structures of the box body and the box cover of the electromagnetic shielding box. In view of the need of opening and closing the electromagnetic shielding case cover ceaselessly, the major axis of pivot and the minor axis of pivot seat need constantly to rub the locking, all chooses good corrosion resisting property and higher hardness's cold-rolled steel sheet with the material of pivot seat and left and right pivot. The box cover is completely buckled, and the front end of the box cover is locked by a cold-rolled steel plate with an anti-loosening hasp.

4. The maximum opening angle of the cover of the electromagnetic shielding box is 95 degrees and more than 90 degrees, the gravity center of the cover is back, and the cover cannot be automatically buckled under the condition of no external force. And meanwhile, a cold-rolled steel plate stopper is arranged between the box cover and the box body, the box cover is supported by the stopper, the box cover is fixed by the weight of the box cover and the stopper, the box cover is prevented from shaking randomly, and the user can operate the electronic mobile equipment safely when replacing the internal electronic mobile equipment.

5. The gap between the box body and the box cover of the electromagnetic shielding box adopts a double-layer concave-convex structure with staggered height to realize the shielding function. Be equipped with the beryllium copper reed of taking the rivet additional in the recess of electromagnetic shield case aluminium system box, aluminium system case lid design tongue, when the case lid is complete the lock, the tongue and groove can compress tightly the beryllium copper reed and play the effect of shielding. Be beryllium copper reed with rivet is installed on cold-rolled steel sheet system case lid additional, when the case lid is complete to be buckled, can compress tightly beryllium copper reed with cold-rolled steel sheet system box and play the effect of shielding. The mounting height of the shielding material of the aluminum case and the cold-rolled steel case is required to form displacement difference and is not on the same horizontal plane, so that electromagnetic waves at the gap between the case body and the case cover can be effectively prevented from leaking, and a better shielding effect is achieved. Be beryllium copper reed with rivet is installed around electromagnetic shield case box and case lid, guarantees the electric continuity of shielding body.

6. According to the electromagnetic shielding box, the travel switch is arranged, after the box cover is buckled and locked with the cold-rolled steel plate hasp, the internal equipment is automatically powered on, and after the box cover is opened, the internal equipment is automatically powered off, so that the equipment in the electromagnetic shielding box is convenient to maintain and replace. The travel switch is additionally provided with the switch cover, so that the internal cable is not exposed, and the safety and reliability are realized while the appearance is neat and attractive.

7. The electromagnetic shielding box is internally provided with an air channel, the front side of the electromagnetic shielding box is provided with a cold air inlet, an exhaust fan is installed to enter cold air, the back side of the electromagnetic shielding box is provided with a hot air outlet, and an air supply fan assembly is installed to supply air. When the size of the hole is larger than the wavelength corresponding to the highest interference frequency, the electromagnetic wave can pass through without attenuation; the smaller the size of the hole is, the stronger the hole attenuates electromagnetic waves; due to the superposition effect of interference, the more the number of holes is, the worse the shielding effectiveness of the case is; the smaller the spacing between adjacent holes, the poorer the shielding effectiveness of the chassis. The board of ventilation hole department on the electromagnetic shield case box is thick for 5mm, and the size in hole is diameter 2.5 mm's round hole, and the hole interval is 10mm, and the design can satisfy the exchange function of inside and outside data again when guaranteeing electromagnetic shield case shielding effectiveness like this to ensure the timely heat dissipation of internal plant work heat through ventilation design, ensure the stable work of equipment.

Drawings

FIG. 1 is a schematic view of the structure of the invention when buckled;

FIG. 2 is a schematic structural view of the present invention when opened and closed;

FIG. 3 is a schematic structural view of the cover of the electromagnetic shielding box of the present invention;

FIG. 4 is a schematic structural view of an aluminum case lid according to the present invention;

FIG. 5 is a schematic structural diagram of the box body of the electromagnetic shielding box of the present invention;

FIG. 6 is a schematic view of the front panel assembly of the electromagnetic shielding case of the present invention;

FIG. 7 is a schematic view of the structure of the back panel assembly of the electromagnetic shielding case of the present invention;

FIG. 8 is a schematic structural view showing the assembly of a U-shaped box made of cold-rolled steel sheets according to the present invention;

FIG. 9 is an exploded view of the present invention when buckled;

FIG. 10 is an exploded view of the present invention when opened and closed;

FIG. 11 is a cross-sectional view of the elliptical rotating shaft and the elliptical hole rotating shaft seat when the present invention is fastened;

FIG. 12 is a cross-sectional view of the elliptical rotating shaft and the elliptical hole rotating shaft seat when the present invention is opened and closed;

fig. 13 is a schematic view of the internal structure of the cover of the electromagnetic shielding box of the present invention.

Wherein: 1 is an electromagnetic shielding box cover, 2 is an electromagnetic shielding box body, 3 is a right elliptical rotating shaft, 4 is a left elliptical rotating shaft, 5 is a cold-rolled steel plate stopper, 6 is a cold air inlet, 7 is a USB aviation connector interface, 8 is a 220V power supply aviation connector interface, 9 is a hot air outlet, 10 is a handle, 11 is a power supply input filter, 12 is a data signal filter, 13 is a travel switch, 14 is a corner protector, 15 is a handle, 16 is a snap hook, 17 is an elliptical hole rotating shaft seat, 18 is a travel switch cover, 19 is a right rotating shaft pressing block, 20 is a left rotating shaft pressing block, 101 is an aluminum box cover, 102 is a cold-rolled steel plate box cover, 103 is a symmetrical beryllium copper reed with a rivet, 104 is a travel switch fixing piece, 105 is a supporting strip, 1011 is an aluminum plate, 1012 is a connecting piece, 201 is an electromagnetic shielding box body front panel assembly, and 202 is an electromagnetic shielding box body rear panel assembly, 203 is a U-shaped box assembly made of cold-rolled steel plates, 2011 is an aluminum front panel, 2012 is an air-inserting fixing plate, 2013 is a front panel made of cold-rolled steel plates, 2014 is a first longitudinal supporting strip, 2015 is a first U-shaped supporting strip, 2016 is an air inlet fan set, 2017 is a fan decorating plate, 2018 is a filter supporting block, 2021 is an aluminum rear panel, 2022 is a rear panel made of cold-rolled steel plates, 2023 is a second longitudinal supporting strip, 2024 is a second U-shaped supporting strip, 2025 is an air outlet fan set, 2026 is a power supply bracket, 2027 is a power supply, 2028 is a second fan decorating plate, 2031 is an aluminum left side plate, 2032 is an aluminum right side plate, 2033 is a third longitudinal supporting strip, 2034 is a fourth longitudinal supporting strip, 2035 is a transverse supporting strip, 2036 is a U-shaped box made of cold-rolled steel, 2037 is an aluminum bottom plate, and 2038 is a sawtooth type beryllium copper reed.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides an electromagnetic shielding case, as shown in figure 1, includes electromagnetic shielding case lid 1, electromagnetic shielding case box 2, and electromagnetic shielding case lid 1 rotates with electromagnetic shielding case box 2 through right oval axis of rotation 3, left oval axis of rotation 4 and is connected, and the lateral wall spiral shell dress of electromagnetic shielding case lid 1 is connected with cold-rolled steel sheet stopper 5, and cold-rolled steel sheet stopper 5 limits the angle that opens and shuts of electromagnetic shielding case lid 1.

Further, as shown in fig. 2, the front surface of the electromagnetic shielding box body 2 is provided with a cold air inlet 6, a USB aviation connector interface 7, a 220V power aviation connector interface 8, the front surface and the back surface of the electromagnetic shielding box body 2 are provided with a hot air outlet 9, handles 10 are installed on two sides of the electromagnetic shielding box body 2, a power input filter 11, a data signal filter 12 and a travel switch 13 are installed inside the electromagnetic shielding box body 2, the periphery of the electromagnetic shielding box body 2 is provided with a corner protector 14, the outside of the travel switch 13 is provided with a travel switch cover 18, and the maximum opening and closing angle of the electromagnetic shielding box cover 1 is 95 °.

Further, as shown in fig. 3, the electromagnetic shielding box cover 1 includes an aluminum box cover 101, a cold-rolled steel box cover 102, a symmetrical beryllium copper spring strip 103 with rivets, a travel switch fixing member 104, and a support strip 105, wherein the support strip 105 is screwed and fixed on the inner side wall of the aluminum box cover 101, the periphery of the cold-rolled steel box cover 102 is provided with a hem, the back of the hem of the cold-rolled steel box cover 102 is lapped on the support strip 105, the symmetrical beryllium copper spring strip 103 with rivets is installed on the front of the hem of the cold-rolled steel box cover 102, the aluminum box cover 101 is screwed and fixedly connected with the cold-rolled steel box cover 102, the travel switch fixing member 104 is screwed and fixed on the aluminum box cover 101, and when the electromagnetic shielding box cover 1 is fastened, the on and off of the circuit are realized through the extrusion of the travel switch fixing member 104 and the travel switch 13.

Further, as shown in fig. 4, the aluminum case cover 101 includes aluminum plates 1011 and connecting members 1012, there are five aluminum plates 1011, the five aluminum plates 1011 are fixed by screws through the connecting members 1012 and then welded, the front of the aluminum case cover 101 is provided with a handle 15 and a snap hook 16, and the back of the aluminum case cover 101 is fixedly connected with an elliptical hole rotating shaft seat 17 through three combination screws.

Further, as shown in fig. 5 and 6, the electromagnetic shielding box body 2 includes an electromagnetic shielding box body front panel assembly 201, an electromagnetic shielding box body rear panel assembly 202, and a cold-rolled steel sheet U-shaped box body assembly 203, the electromagnetic shielding box body front panel assembly 201 and the electromagnetic shielding box body rear panel assembly 202 are respectively disposed at the front end and the rear end of the cold-rolled steel sheet U-shaped box body assembly 203, the electromagnetic shielding box body front panel assembly 201 includes an aluminum front panel 2011, an aviation plug fixing plate 2012, a cold-rolled steel sheet front panel 2013, a first longitudinal support bar 2014, a first U-shaped support bar 2015, an air intake fan set 2016, a fan decorative plate 2017, a filter support block 2018, a first longitudinal support bar 2014 and one end of the first U-shaped support bar 2015 are fixed on the aluminum front panel 2011 by screws, the aviation plug fixing plate 2012 is fixed on the aluminum front panel 2013 by screws, the other end of the first longitudinal support bar 2014 and the first U-shaped support bar 2015 are screwed on the cold-rolled steel plate 2013, an air inlet fan set 2016 is screwed on a cold-rolled steel front panel 2013, a fan decorative panel 2017 is screwed on the air inlet fan set 2016, a filter supporting block 2018 is screwed on the cold-rolled steel front panel 2013, and a power input filter 11 is fixed on the filter supporting block 2018.

Further, as shown in fig. 7, the electromagnetic shielding box rear panel assembly 202 includes an aluminum rear panel 2021, a rear panel 2022 made of cold-rolled steel, a second longitudinal supporting strip 2023, a second U-shaped supporting strip 2024, an air outlet fan set 2025, a power supply bracket 2026, a power supply 2027, and a second fan decorative panel 2028, wherein one end of the second longitudinal supporting strip 2023 and one end of the second U-shaped supporting strip 2024 are fixed to the aluminum rear panel 2021 by screws, the other end of the second longitudinal supporting strip 2023 and the other end of the second U-shaped supporting strip 2024 are screwed to the rear panel 2022 made of cold-rolled steel, the air outlet fan set 2025 is screwed to the rear panel 2022 made of cold-rolled steel, the second fan decorative panel 2028 is screwed to the air outlet fan set 2025, the power supply bracket 2026 is fixed to the rear panel 2022 made of cold-rolled steel, and the power supply 2027 is fixed to the power supply bracket 2026. The electromagnetic shielding box body 2 is provided with ventilation holes, the thickness of the plate at the ventilation holes is 5mm, the size of each ventilation hole is a circular hole with the diameter of 2.5mm, and the hole intervals of the ventilation holes are 10 mm.

Further, as shown in fig. 8, the U-shaped box assembly 203 made of cold-rolled steel plate includes an aluminum left side plate 2031, an aluminum right side plate 2032, a third longitudinal support bar 2033, a fourth longitudinal support bar 2034, a transverse support bar 2035, a U-shaped box 2036 made of cold-rolled steel plate, an aluminum bottom plate 2037, and a sawtooth beryllium copper reed 2038, wherein the aluminum left side plate 2031 is connected to one side of the U-shaped box 2036 made of cold-rolled steel plate through the third longitudinal support bar 2033, the aluminum right side plate 2032 is connected to the other side of the U-shaped box 2036 made of cold-rolled steel plate through the fourth longitudinal support bar 2034 and the transverse support bar 2035, the aluminum bottom plate 2037 is connected to the bottom of the U-shaped box 2036 made of cold-rolled steel plate, and contact surfaces between the aluminum left side plate 2031, the aluminum right side plate 2032, and the aluminum bottom.

Further, grooves are formed in the aluminum front panel 2011, the aluminum rear panel 2021, the aluminum left side panel 2031 and the aluminum right side panel 2032, shielding materials are arranged in the grooves of the aluminum front panel 2011, the aluminum rear panel 2021, the aluminum left side panel 2031 and the aluminum right side panel 2032, and symmetrical beryllium copper reeds 103 with rivets are assembled in the grooves of the aluminum front panel 2011, the aluminum rear panel 2021, the aluminum left side panel 2031 and the aluminum right side panel 2032.

Further, as shown in fig. 9 and 10, the electromagnetic shielding box body 2 is fixedly connected with a right rotating shaft pressing block 19 and a left rotating shaft pressing block 20, the right elliptical rotating shaft 3 and the left elliptical rotating shaft 4 are respectively fixed on the right rotating shaft pressing block 19 and the left rotating shaft pressing block 20, the electromagnetic shielding box cover 1 is fixedly connected with an elliptical hole rotating shaft seat 17, and as shown in fig. 11 and 12, the right elliptical rotating shaft 3 and the left elliptical rotating shaft 4 respectively penetrate into the elliptical hole rotating shaft seat 17.

Further, the 220V power supply aviation connector 8 is connected to the power supply input filter 11, one side of the power supply input filter 11 is fixed to the electromagnetic shielding box body 2, the other side of the power supply input filter 11 is fixed to the filter supporting block 2018, the USB aviation connector interface 7 is connected to the data signal filter 12, and the data signal filter 12 is fixed to the electromagnetic shielding box body 2.

Furthermore, the draw-bar box and the EPE pearl wool are arranged outside the electromagnetic shielding box body 2, and the electromagnetic shielding box can be directly used inside the draw-bar box and also can be moved out and placed on a table for use. Each electromagnetic shielding box is matched with an independent bar code, so that the electromagnetic shielding box is convenient for a user to identify and carry. Electromagnetic shielding of various mobile electronic office equipment can be realized in the box body. The electromagnetic shielding box can be internally filled with various mobile electronic office equipment, such as printers, scanners, fax machines and the like.

According to the electromagnetic shielding box, the double-layer metal plate is mixed, the elliptic rotating structure is locked, the double-layer concave-convex structure and the height-staggered structure are adopted between the box body and the box cover, so that the electromagnetic shielding box has excellent shielding efficiency in all wave bands, and can meet the C-level requirement of BMB19-2006 electromagnetic leakage emission shielding cabinet technical requirement and test method, the laboratory test report number is CTEC2017C319P312, and the laboratory test data is as shown in the following table.

Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.

Claims

1. An electromagnetic shielding case, characterized in that: including electromagnetic shielding case lid (1), electromagnetic shielding case box (2), electromagnetic shielding case lid (1) is rotated with electromagnetic shielding case box (2) through right oval axis of rotation (3), left oval axis of rotation (4) and is connected, the lateral wall spiral shell dress of electromagnetic shielding case lid (1) is connected with cold-rolled steel sheet stopper (5), the angle that opens and shuts of electromagnetic shielding case lid (1) is restricted in cold-rolled steel sheet stopper (5).

2. An electromagnetic shielding cage according to claim 1, wherein: the electromagnetic shielding box body (2) is provided with a cold air inlet (6), a USB aviation connector interface (7) and a 220V power aviation connector interface (8) in the front, a hot air outlet (9) is arranged on the front back surface of the electromagnetic shielding box body (2), handles (10) are arranged on two sides of the electromagnetic shielding box body (2), a power input filter (11), a data signal filter (12) and a travel switch (13) are arranged inside the electromagnetic shielding box body (2), corner protectors (14) are arranged on the periphery of the electromagnetic shielding box body (2), a travel switch cover (18) is arranged outside the travel switch (13), the maximum opening and closing angle of the electromagnetic shielding box cover (1) is 95 degrees, the 220V power aviation connector (8) is connected to the power input filter (11), one side of the power input filter (11) is fixed on the electromagnetic shielding box body (2), the other side of the power input filter (11) is fixed on the filter supporting block (2018), the USB aviation connector interface (7) is connected on the data signal filter (12), and the data signal filter (12) is fixed on the electromagnetic shielding box body (2).

3. An electromagnetic shielding cage according to claim 1, wherein: the electromagnetic shielding box cover (1) comprises an aluminum box cover (101), a cold-rolled steel plate box cover (102), symmetrical beryllium copper reeds (103) with rivets, a travel switch fixing piece (104) and supporting strips (105), the supporting strips (105) are fixed on the inner side wall of the aluminum box cover (101) in a screw mode, the periphery of the cold-rolled steel plate box cover (102) is provided with folded edges, the back of the folded edge of the cold-rolled steel sheet box cover (102) is lapped on a supporting strip (105), the front side of the folded edge of the cold-rolled steel sheet box cover (102) is provided with a symmetrical beryllium copper reed (103) with a rivet, the aluminum box cover (101) is fixedly connected with the cold-rolled steel plate box cover (102) in a screw-mounting way, a travel switch fixing piece (104) is fixed on the aluminum box cover (101) in a screwed mode, when the electromagnetic shielding box cover (1) is buckled, the on and off of a circuit are realized through the extrusion of the travel switch fixing piece (104) and the travel switch (13).

4. An electromagnetic shielding cage according to claim 3, wherein: aluminium system case lid (101) includes aluminum plate (1011), connecting piece (1012), aluminum plate (1011) has five, welds through connecting piece (1012) fixed back spiral shell dress between five aluminum plate (1011), handle (15) and hasp (16) are installed to aluminium system case lid (101) front, aluminium system case lid (101) back is through three combination screw fixedly connected with elliptical hole pivot seat (17).

5. An electromagnetic shielding cage according to claim 1, wherein: the electromagnetic shielding box body (2) comprises an electromagnetic shielding box body front panel assembly (201), an electromagnetic shielding box body rear panel assembly (202) and a cold-rolled steel plate U-shaped box body assembly (203), wherein the electromagnetic shielding box body front panel assembly (201) and the electromagnetic shielding box body rear panel assembly (202) are respectively arranged at the front end and the rear end of the cold-rolled steel plate U-shaped box body assembly (203), the electromagnetic shielding box body front panel assembly (201) comprises an aluminum front panel (2011), a navigation plug fixing plate (2012), a cold-rolled steel plate front panel (2013), a first longitudinal supporting bar (2014), a first U-shaped supporting bar (2015), an air inlet fan set (2016), a fan decorative plate (2017) and a filter supporting block (2018), one ends of the first longitudinal supporting bar (2014) and the first U-shaped supporting bar (2015) are fixed on the aluminum front panel (2011) through screws, fix on aluminium system front panel (2011) through the screw by plane fixed plate (2012), another end spiral shell dress of first longitudinal support bar (2014), first U type support bar (2015) is on cold-rolled steel sheet system front panel (2013), air inlet fan group (2016) spiral shell dress is on cold-rolled steel sheet system front panel (2013), fan decorative board (2017) spiral shell dress is on air inlet fan group (2016), filter supporting shoe (2018) spiral shell dress is on cold-rolled steel sheet system front panel (2013), be fixed with power input filter (11) on filter supporting shoe (2018), electromagnetic shield box body rear panel assembly (202) are including aluminium system rear panel (2021), cold-rolled steel sheet system rear panel (2022), second longitudinal support bar (2023), second U type support bar (2024), air-out fan group (2025), power support (2026), power (2027), Second fan decorative board (2028), the one end of second longitudinal support bar (2023), second U type support bar (2024) is passed through the fix with screw on aluminium system rear panel (2021), the other end screw dress of second longitudinal support bar (2023), second U type support bar (2024) is on cold-rolled steel sheet system rear panel (2022), air-out fan group (2025) screw dress is on cold-rolled steel sheet system rear panel (2022), second fan decorative board (2028) screw dress is on air-out fan group (2025), power support (2026) are fixed on cold-rolled steel sheet system rear panel (2022), be fixed with power (2027) on power support (2026), be provided with the ventilation hole on electromagnetic shield case box (2), the thickness of ventilation hole department is 5mm, the size of ventilation hole is diameter 2.5 mm's round hole, the hole interval of ventilation hole is 10 mm.

6. An electromagnetically shielded enclosure as claimed in claim 5, wherein: the U-shaped box assembly (203) made of the cold-rolled steel plate comprises an aluminum left side plate (2031), an aluminum right side plate (2032), a third longitudinal supporting strip (2033), a fourth longitudinal supporting strip (2034), a transverse supporting strip (2035), a U-shaped box body (2036) made of the cold-rolled steel plate, an aluminum bottom plate (2037) and a sawtooth-shaped beryllium copper reed (2038), the aluminum left side plate (2031) is connected with one side of a U-shaped box body (2036) made of cold-rolled steel plates through a third longitudinal supporting strip (2033), the aluminum right side plate (2032) is connected with the other side of the U-shaped box body (2036) made of cold-rolled steel plates through a fourth longitudinal supporting bar (2034) and a transverse supporting bar (2035), the aluminum bottom plate (2037) is connected to the bottom of the U-shaped box body (2036) made of cold-rolled steel, and contact surfaces among the aluminum left side plate (2031), the aluminum right side plate (2032) and the aluminum bottom plate (2037) are respectively stuck with a sawtooth type beryllium copper reed (2038) and then are fixed in a screwing way.

7. An electromagnetically shielded enclosure as claimed in claim 6, wherein: the aluminum front panel (2011), the aluminum rear panel (2021), the aluminum left side plate (2031) and the aluminum right side plate (2032) are all provided with grooves, shielding materials are arranged in the grooves of the aluminum front panel (2011), the aluminum rear panel (2021), the aluminum left side plate (2031) and the aluminum right side plate (2032), and the grooves of the aluminum front panel (2011), the aluminum rear panel (2021), the aluminum left side plate (2031) and the aluminum right side plate (2032) are provided with symmetrical beryllium copper reeds (103) with rivets.

8. An electromagnetically shielded enclosure as claimed in claim 1 or 4, wherein: fixedly connected with right pivot briquetting (19), left pivot briquetting (20) are gone up in electromagnetic shielding case box (2), right oval axis of rotation (3), left oval axis of rotation (4) are fixed respectively on right pivot briquetting (19), left pivot briquetting (20), fixedly connected with elliptical aperture pivot seat (17) are gone up in electromagnetic shielding case lid (1), right oval axis of rotation (3), left oval axis of rotation (4) penetrate elliptical aperture pivot seat (17) respectively in.

9. An electromagnetic shielding cage according to claim 1, wherein: the electromagnetic shielding box is characterized in that a draw-bar box and EPE pearl wool are arranged outside the electromagnetic shielding box body (2), and each electromagnetic shielding box body (2) is matched with an independent bar code.

10. An electromagnetic shielding cage according to claim 1, wherein: the electromagnetic shielding box meets the requirements of class C of technical requirements and test methods of electromagnetic leakage emission shielding cabinets of BMB 19-2006; the electromagnetic shielding effectiveness of the electromagnetic shielding box is more than 50dB when the detection frequency is 14 kHz; the electromagnetic shielding effectiveness of the electromagnetic shielding box is more than 75dB when the detection frequency is 100 kHz; the electromagnetic shielding box has the electromagnetic shielding effectiveness of more than 90dB when the detection frequency is 1 MHz; the electromagnetic shielding box has the electromagnetic shielding effectiveness of more than 90dB when the detection frequency is 450 MHz; the electromagnetic shielding box has electromagnetic shielding effectiveness larger than 85dB when the detection frequency is 950 MHz.