Protective cabin for electronic equipment

Abstract

The utility model relates to a protective cabin for electronic equipment (40), which comprises an electromagnetic protective cabin body (10) and an electromagnetic protective panel (20) consisting of a first part (20a) and a second part (20b) which are butted with each other, and the first part and the second part form at least one pair of first and second semicircular openings (21a, 21b) along a butting line. A first semicircular sealing gasket (22a) and a second semicircular sealing gasket (22b) with groove-shaped cross sections are adhered to the edge of the electromagnetic protection panel, and the first semicircular opening, the second semicircular opening, the first semicircular sealing gasket and the second semicircular sealing gasket are respectively butted when the first part and the second part of the electromagnetic protection panel are butted together; the electronic equipment is provided with at least one electric connector (50) extending out of the electromagnetic protection panel, and the first semicircular sealing gasket and the second semicircular sealing gasket carry out electromagnetic protection on a gap formed by the electric connector penetrating through the electromagnetic protection panel after the first semicircular sealing gasket and the second semicircular sealing gasket are in butt joint. The protection cabin can protect high-grade electronic equipment in the protection cabin from electromagnetic interference of a high-intensity radiation field.

Description

Technical Field

[0001] The utility model relates to a protective cabin for electronic equipment, and more specifically, to a protective cabin for protecting high-grade electronic equipment in an aircraft from electromagnetic interference of a high-intensity radiation field. Background Art

[0002] A large number of high-precision electronic instruments and meters are installed on an aircraft, and electromagnetic environments such as lightning indirect effects and high-intensity radiation fields (HIRF) will interfere with the normal operation of airborne electronic equipment, especially key and important high-grade protected electronic equipment, which will have an adverse impact on the safe operation of the aircraft.

[0003] For example, when the aircraft flies over the vicinity of an airport or a ground radar station, high-power radars and transmitters on the ground will generate significant electromagnetic interference to the airborne electronic equipment. Although the high-grade electronic equipment on the aircraft itself has been designed for electromagnetic protection, due to the possible enhancement of the high-intensity radiation field in some semi-closed and narrow areas of the aircraft due to electromagnetic resonance effects, such as in semi-closed cavities such as the main landing gear bay surrounded by metal structures on the aircraft. Therefore, additional electromagnetic protection designs need to be adopted for the key and important high-grade electronic equipment on the aircraft to weaken electromagnetic interference.

[0004] The interference effect of the high-intensity radiation field on airborne electronic equipment is omnidirectional (i.e., regardless of direction) and has extremely strong penetrability, and will penetrate into the internal circuit of the equipment through various fine gaps to cause electromagnetic interference. And airborne electronic equipment is usually connected with electrical connectors and cables to provide power supply and signal transmission. Therefore, the electromagnetic protection design for the plug-in joints of electrical connectors and the assembly installation joints on airborne electronic equipment is a major difficulty in the high-intensity radiation field protection design of airborne electronic equipment.

[0005] First, for the annular gap at the penetration of the external connecting cable of the airborne electronic equipment, the existing technologies mainly include adding an electrical connection socket at the penetration to achieve electrical connection (for example, see Chinese Utility Model Patents CN215269340U, CN202145215U, etc.), and opening a through hole with the same diameter as the cable on the protective cabin body (box / case / cabinet) (for example, see Chinese Utility Model Patent CN216532458U).

[0006] However, the above designs have deficiencies. For example, for airborne high-precision electronic devices and data transmission cables, if a new electrical connection socket is added to the protective cabin (box / case), the cable needs to be disconnected at the new break point, which may generate parasitic capacitance in the data transmission cable, thus affecting the accuracy of signal and data transmission of airborne electronic devices. For example, if the fuel quantity measurement cable of an aircraft is disconnected and a break point is added, the generated parasitic capacitance will cause the capacitance value collected by the computer to increase, thus resulting in a deviation in the calculated fuel quantity data. However, if a through-hole with the same diameter as the cable is opened on the protective cabin (box / case) without additional sealing treatment, a good protective effect cannot be achieved, which is especially disadvantageous for a high-intensity radiation field with strong permeability.

[0007] Secondly, for the long-strip gaps formed on the protective cabin (box / case) due to assembly methods such as mating and plugging, the existing technologies mainly include plugging by inserting the convex and concave slots on the box cover and the box body components (for example, see Chinese Utility Model Patent Applications CN114867333A, CN101472453A, and Chinese Utility Models CN201821636U, CN202886423U), bending the metal sheet at the edge of the box cover by sheet metal working for plugging (for example, see Chinese Utility Model Patent CN216532458U), and plugging by adding gaskets at the joint of the box cover and the box body (for example, see Chinese Utility Model Patents CN215269340U, CN201657595U). However, the above designs also have the following deficiencies:

[0008] 1) The design requirements of the aircraft call for lightweight, while the form of the convex and concave slots on the box cover and the box body requires a relatively large wall thickness of the protective box to facilitate opening grooves at the interface, which will greatly increase the weight of the aircraft;

[0009] 2) After the metal sheet at the edge of the box cover is bent by sheet metal working and installed, it is difficult to achieve a completely tight fit due to assembly tolerances and other reasons, so the protective effect against a high-intensity radiation field with strong permeability is not good;

[0010] 3) The form of adding gaskets at the joint of the box cover and the box body requires adding new parts, and requires the specification and shape of the gaskets to be highly consistent with the outer shape of the box body. Therefore, the versatility is not strong, and it also increases the weight of the aircraft.

[0011] Thirdly, the temperature and air pressure change rapidly before and after the aircraft takes off and lands, which is likely to generate air condensate in the protective cabin (box / case). Most of the existing technologies do not consider the ventilation and drainage functions of the protective cabin (box / case).

[0012] Fourth, most of the existing protective cabins (boxes / cases) need to be closed by means of mating, plugging, rotating and closing, etc., but no anti-misoperation design for the installation of the protective cabin (box / case) has been found.

[0013] Finally, the existing technology mainly focuses on the protection of general electromagnetic environments, and does not specifically consider the electromagnetic environment of high-intensity radiation fields with particularly strong penetration and particularly wide radio frequency ranges.

[0014] Therefore, there is an urgent need in the industry to design a protective cabin for electronic devices, which can protect high-grade electronic devices therein from electromagnetic interference of high-intensity radiation fields. Utility Model Content

[0015] In order to solve the above problems, the present utility model provides a protective cabin for electronic devices, which can protect high-grade electronic devices therein from electromagnetic interference of high-intensity radiation fields.

[0016] The first aspect of the present utility model relates to a protective cabin for electronic devices, comprising:

[0017] An electromagnetic protection cabin body, in which an electronic device is accommodated in the internal space; and

[0018] An electromagnetic protection panel composed of a first part and a second part that are butted against each other. At least a pair of first semi-circular openings and second semi-circular openings are formed along the butting line of the first part and the second part. The edges of the first semi-circular openings and the second semi-circular openings are bonded with a first semi-circular sealing gasket and a second semi-circular sealing gasket with a groove-shaped cross-section.

[0019] When the first part and the second part of the electromagnetic protection panel are butted together, the first semi-circular openings, the second semi-circular openings, the first semi-circular sealing gasket, and the second semi-circular sealing gasket are also butted against each other respectively.

[0020] The electronic device is equipped with at least one electrical connector that extends out of the electromagnetic protection panel through the first semi-circular opening and the second semi-circular opening. After being butted, the first semi-circular sealing gasket and the second semi-circular sealing gasket provide electromagnetic protection for the gap formed by the electrical connector passing through the electromagnetic protection panel, specifically an annular gap.

[0021] The above technical solution provides electromagnetic protection for the annular gap where the electrical connector passes through the electromagnetic protection cabin body by fitting and installing semi-circular sealing gaskets mixed with conductive metal particles. The outer ring of the semi-circular sealing gasket mixed with conductive metal particles is electrically lapped with the electromagnetic protection panel, and its inner ring is electrically lapped with the metal shell of the tail accessory of the electrical connector, achieving electrical continuity and electromagnetic sealing of the annular gap where the electrical connector passes through the electromagnetic protection cabin body, thus achieving better electromagnetic protection efficiency. The above sealing gasket can select different inner diameters according to the size of the metal shell of the electrical connector, has good adaptability, and is suitable for different specifications of electrical connectors to provide electromagnetic protection for the above annular gap.

[0022] In a preferred embodiment, the electromagnetic protection cabin body can be composed of a rear panel, each peripheral wall surrounding the rear panel to form the internal space of the electromagnetic protection cabin body, and an interface flange oppositely arranged around the open side of the electromagnetic protection cabin body relative to the rear panel.

[0023] More preferably, the electromagnetic protection panel and the interface flange can be sized to form a stepped portion when fastened together, and a conductive sealant is used to fill and seal the corner of the stepped portion between the electromagnetic protection panel and the interface flange. The conductive sealant is preferably a liquid or paste sealant mixed with conductive metal particles.

[0024] In the above technical solution, the electromagnetic protection panel and the interface flange adopt a differential design in terms of specification dimensions, forming a stepped portion at the four peripheral edges of the electromagnetic protection panel. The side wall surfaces on both sides of the angle of the stepped portion are prepared as electrical lapping surfaces, and a conductive sealant mixed with conductive metal particles is used to continuously fill and seal the corner of the stepped portion (or fill the gap, or seal the joint surface), which can provide electromagnetic protection for the long strip-shaped gap at the joint of the electromagnetic protection panel and the electromagnetic protection cabin body.

[0025] The installation method of filling and sealing with a conductive sealant is not limited by the external shape specifications of the assembled components and has wide applicability. Since the conductive sealant is a black paste, after designing the stepped portion and filling and sealing the corner, it is convenient to observe the electromagnetic sealing situation at the long strip-shaped gap of the assembled components. Once it falls off, it can be discovered in time.

[0026] In the case of joint surface sealing, the four peripheral edges of the electromagnetic protection panel and the surfaces of the interface flange in contact with the conductive sealant can be prepared as electrical lapping surfaces, and are electrically lapped and electrically connected through the conductive sealant, so as to achieve the effect of electromagnetic shielding.

[0027] Preferably, the first part and the second part of the electromagnetic protection panel can be butt-jointed in a staggered stepped manner at the docking line, and the joint edges are chamfered to form a groove of approximately 90° after docking.

[0028] Preferably, the groove formed after the butt joint of the first part and the second part of the electromagnetic protection panel can be filled with a conductive sealant. Similarly, the conductive sealant is preferably a liquid or paste sealant admixed with conductive metal particles. This conductive sealant can be used to implement fillet sealing in any shape and can play the role of electrical continuity and sealing after solidification and shaping.

[0029] In the above technical solution, by opening a 90° right-angle groove or a groove close to 90° at the butt joint line between the two components of the electromagnetic protection panel and using a conductive sealant admixed with conductive metal particles for caulking and sealing, electrical continuity can be achieved, thereby achieving the electromagnetic shielding effect. Such a butt joint method is beneficial to the later maintenance of electronic devices and can improve the operation convenience. In addition, using a staggered stepped butt joint at the butt joint line of the electromagnetic protection panel can effectively reduce the intensity of the high-intensity radiation field passing through the gap and entering the electromagnetic protection cabin.

[0030] In a preferred embodiment, the electromagnetic protection cabin can be provided with a plurality of sets of micro circular holes in each peripheral wall, preferably in the peripheral walls located at the top and bottom, for ventilation and drainage of the internal space of the electromagnetic protection cabin.

[0031] Specifically, at least one set, preferably two sets, of micro circular holes at the bottom of the electromagnetic protection cabin are used for drainage to prevent liquid accumulation caused by air condensation inside the electromagnetic protection cabin, while at least one set, preferably two sets, of micro circular holes at the top of the electromagnetic protection cabin are used for ventilation. The size specifications and arrangement intervals of the micro circular holes have been verified by electromagnetic shielding effectiveness tests and will not affect the protection effect against high-intensity radiation fields.

[0032] In a preferred embodiment, the back panel of the electromagnetic protection cabin can be provided with a plurality of first fastener mounting holes on both sides thereof to mount and fix the electromagnetic protection cabin to a predetermined structure such as an aircraft structure, and the first fastener mounting holes are arranged asymmetrically with respect to the center of the back panel.

[0033] Preferably, the back panel can be provided with a plurality of third fastener mounting holes to mount and fix an electronic device to the internal space of the electromagnetic protection cabin, and the third fastener mounting holes are arranged asymmetrically with respect to the center of the back panel.

[0034] In yet another preferred embodiment, the interface flange can be provided with a plurality of second fastener mounting holes, and the electromagnetic protection panel is provided with a corresponding number of fourth fastener mounting holes that cooperate with the second fastener mounting holes to mount and fix the electromagnetic protection panel to the interface flange, and the second fastener mounting holes and the fourth fastener mounting holes are arranged asymmetrically with respect to the interface flange and the electromagnetic protection panel.

[0035] In the second fastener installation hole, the installation hole fixedly cooperating with the first part of the electromagnetic protection panel may have a first shape, and the installation hole fixedly cooperating with the second part of the electromagnetic protection panel may have a second shape different from the first shape.

[0036] Preferably, the first shape is a circular hole and the second shape is a kidney-shaped hole.

[0037] This anti-misassembly design can prevent the installation direction of the electromagnetic protection cabin on the aircraft structure from being reversed, and at the same time can also prevent the assembly direction of the electromagnetic protection panel on the electromagnetic protection cabin from being reversed.

[0038] In the above technical solution, the electromagnetic protection cabin adopts a thin-wall design. The thickness of the back panel is preferably 3 mm, and the thickness of each peripheral wall and the interface flange is preferably 2 mm.

[0039] In yet another preferred embodiment, the first semi-circular sealing gasket and the second semi-circular sealing gasket are made of an elastic material admixed with conductive metal particles and are fixed to the first semi-circular opening and the second semi-circular opening, for example, by bonding or inlaying. Its outer ring is electrically lapped with the electromagnetic protection panel, and its inner ring is electrically lapped with at least a part of the electrical connector, such as the tail attachment housing of the electrical connector, realizing electrical continuity and electromagnetic sealing of the annular gap at the penetration of the electrical connector through the cabin, thereby obtaining better electromagnetic protection performance.

[0040] In addition to the above-mentioned technical effects, the protection cabin for electronic devices according to the present invention can also obtain the following advantages:

[0041] (1) The present invention is particularly suitable for electromagnetic protection of high-grade electronic devices in a high-intensity radiation field environment;

[0042] (2) The present invention provides a protection cabin and a new installation method for the protection cabin for electromagnetic protection design of airborne electronic devices for aircraft. Some of the protection features have been actually applied to the C919 aircraft and have passed the airworthiness verification;

[0043] (3) The present invention has wide adaptability. The conductive sealing gasket for electromagnetic protection of the annular gap can be appropriately adjusted according to the size specification of the electrical connector, and the sealing method of the conductive sealant for electromagnetic protection of the long-strip gap is not limited by the shape of the panel;

[0044] (4) The present invention installs multiple airborne electronic devices for aircraft inside the electromagnetic protection component without any limit on the number of devices. Therefore, it has a relatively broad application scenario in the electromagnetic protection of airborne electronic devices.

[0045] (5) The electromagnetic protection component of the present utility model can be realized through machining processes, with simple processes and low manufacturing costs; since they are all thin-walled structures, they have a simple structure, light weight, wide application range, and are convenient for disassembly and assembly; and

[0046] (6) The method of using an annular conductive sealing gasket for electromagnetic protection of the annular gap and using a conductive sealant for electromagnetic protection of the strip-shaped gap is also applicable to the electromagnetic protection of the annular gap and the strip-shaped gap during the encapsulation of the electronic device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to further illustrate the technical effects of the protection cabin for electronic devices according to the present utility model, the present utility model will be described in detail below in conjunction with the drawings and specific embodiments, where:

[0048] Figure 1 is an exploded perspective view of the protection cabin for electronic devices according to the present utility model;

[0049] Figure 2 is Figure 1 the top view after the protection cabin for electronic devices shown in is assembled together;

[0050] Figure 3 is Figure 1 the side view and partial sectional view after the protection cabin for electronic devices shown in is assembled together;

[0051] Figures 4A to 4C are respectively the partial enlarged views of the fillet sealing of the groove, the first and second semi-circular sealing gaskets, and the conductive sealant, where Figure 4A the groove in is a groove of approximately 90° formed by the misaligned stepped mating of the first part and the second part of the electromagnetic protection panel; and

[0052] Figure 5 is Figure 1 the perspective view after the protection cabin for electronic devices shown in is assembled together.

[0053] REFERENCE NUMERALS

[0054] 10 Electromagnetic protection cabin body

[0055] 11 Rear panel

[0056] 12 Interface flange

[0057] 13 First fastener mounting hole

[0058] 14 First fastener

[0059] 15 Second fastener mounting hole

[0060] 15a Lower mounting hole

[0061] Upper mounting hole above 15b

[0062] 16 Second fastener

[0063] 17 Third fastener mounting hole

[0064] 18 Third fastener

[0065] 19 Micro circular hole

[0066] 20 Electromagnetic protection panel

[0067] 20a Lower half

[0068] 20b Upper half

[0069] 21 Through hole

[0070] 21a First semi-circular opening

[0071] 21b Second semi-circular opening

[0072] 22a First semi-circular sealing gasket

[0073] 22b Second semi-circular sealing gasket

[0074] 23 Fourth fastener mounting hole

[0075] 23a Lower mounting hole

[0076] 23b Upper mounting hole

[0077] 24 Conductive sealant

[0078] 25 Groove

[0079] 40 Electronic device

[0080] 41 Electrical connector end

[0081] 42 Mounting angle bar

[0082] 43 Threaded hole

[0083] 50 Electrical connector

[0084] 51 Socket end

[0085] 52 Tail accessory housing

[0086] 53 Cable Detailed implementation manners

[0087] The following describes the structure, assembly process and technical effects of the protection cabin for an electronic device according to the present utility model with reference to the accompanying drawings.

[0088] It should be clear that the embodiments described in this specification only cover a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments described in the specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0089] Unless otherwise defined, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model.

[0090] For example, the terms "comprising" and "having" and any variations thereof in the specification, claims and above-mentioned drawings of the present utility model are intended to cover non-exclusive inclusion. The singular forms of "a", "the" and "said" used in the embodiments of the present utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. The terms "first", "second", "third", etc. in the specification and claims of this application are used to distinguish different objects, rather than to describe a specific order or primary-secondary relationship. Based on the same understanding of orientation, in the description of the present utility model, the terms "both sides", "top" and "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0091] Figure 1 A protective cabin according to the present utility model for an electronic device, especially for an electronic device used in an aircraft, is shown in a disassembled manner. Figure 2 and 3 respectively are Figure 1 the top view, side view and partial sectional view of the shown protective cabin.

[0092] The protective cabin according to the present utility model is particularly suitable for the protection of aircraft electronic devices, but can also be applied to the protection of electronic devices in other fields such as automobiles, ships, and aerospace.

[0093] The protective cabin includes an electromagnetic protection cabin body 10 and an electromagnetic protection panel 20 composed of two parts. The electronic device 40 to be protected is accommodated in the internal space of the electromagnetic protection cabin body 10. The electronic device 40 is usually equipped with a series of electrical connector ends 41. The tail attachment housing 52 of at least one electrical connector 50 is sleeved onto the electrical connector end 41 at the socket end 51 and protrudes outward from the electrical connector end 41 through the electromagnetic protection panel 20.

[0094] As Figure 1 shown, the electromagnetic protection cabin 10 is basically a semi-closed shell structure and is made of metal material. Preferably, it is formed by one-piece machining of aluminum. The semi-closed shell structure is composed of a rear panel 11, each peripheral wall surrounding the rear panel 11 to form the internal space of the electromagnetic protection cabin 10, and an interface flange 12 disposed opposite to the rear panel 11 around the open side of the electromagnetic protection cabin 10. The electromagnetic protection cabin 10 is usually in the shape of a cube, but can also be designed into other shapes according to the shape of the electronic device 40 to be protected accommodated in the internal space of the electromagnetic protection cabin 10, such as a round cake shape, a cuboid shape, and so on.

[0095] On the flange portions on both sides of the rear panel 11 of the electromagnetic protection cabin 10, a plurality of, preferably four, first fastener mounting holes 13 are provided in total. With the corresponding number of first fasteners 14, the electromagnetic protection cabin 10 can be mounted and fixed to the aircraft structure via these first fastener mounting holes 13. The first fastener mounting holes 13 can be arranged symmetrically or asymmetrically with respect to the center of the rear panel 11. In the case where the first fastener mounting holes 13 are arranged asymmetrically with respect to the center of the rear panel 11, the installation direction of the electromagnetic protection cabin 10 on the aircraft structure can be prevented from being reversed. The number of the first fastener mounting holes 13 is not limited to four. Those skilled in the art can change the number of the first fastener mounting holes 13 according to the actual situation, and these variations should all fall within the protection scope of the present utility model.

[0096] In the projection area of the rear panel 11 in the internal space of the electromagnetic protection cabin 10, a plurality of, preferably four, third fastener mounting holes or device mounting holes 17 are provided. With the corresponding number of third fasteners 18, the electronic device 40 is mounted and fixed to the internal space of the electromagnetic protection cabin 10 via these third fastener mounting holes 17. Similarly, the third fastener mounting holes 17 can be arranged symmetrically or asymmetrically with respect to the center of the rear panel 11. In the case where the third fastener mounting holes 17 are arranged asymmetrically with respect to the center of the rear panel 11, the installation direction of the electronic device 40 on the rear panel 11 can be prevented from being reversed. The number of the third fastener mounting holes 17 is not limited to four. Those skilled in the art can change the number of the third fastener mounting holes 17 according to the actual situation, and these variations should all fall within the protection scope of the present utility model.

[0097] The electronic device 40 is equipped with mounting angle bars 42 on both sides thereof, such as Figure 1 the top side and the bottom side shown in, and the mounting angle bars 42 are provided with screw holes 43 that cooperate with the third fastener mounting holes 17. Of course, the electronic device 40 can also be attached and installed in the internal space of the electromagnetic protection cabin 10 by other means.

[0098] The electromagnetic protection cabin 10 as a whole adopts a thin-wall design. Among them, the thickness of the back panel 11 is preferably 3 mm for supporting the protected electronic device 40, and the thickness of each peripheral wall and the interface flange 12 is preferably 2 mm for shielding external electromagnetic interference.

[0099] In each peripheral wall of the electromagnetic protection cabin 10, preferably in the peripheral walls at the top and bottom, a group of multiple micro-round holes 19 are provided for ventilation and drainage of the internal space of the electromagnetic protection cabin 10. The size specifications and arrangement intervals of the micro-round holes 19 are determined by the electromagnetic shielding effectiveness test of the protection cabin of the aircraft electronic device, so as not to cause electromagnetic interference to the protected electronic device 40.

[0100] A plurality of, preferably twelve, second fastener mounting holes 15 are provided on the interface flange 12, and a corresponding number of, preferably twelve, fourth fastener mounting holes 23 that cooperate with the second fastener mounting holes 15 are provided on the electromagnetic protection panel 20. With the corresponding number of second fasteners 16, the electromagnetic protection panel 20 is mounted and fixed to the interface flange 12 around the open side of the electromagnetic protection cabin 10 through the second fastener mounting holes 15 and the fourth fastener mounting holes 23.

[0101] Among the above-mentioned fourth fastener mounting holes 23, the lower mounting holes 23a located on the lower half 20a of the electromagnetic protection panel 20 and the upper mounting holes 23b located on the upper half 20b of the electromagnetic protection panel 20 are both round holes. Among the above-mentioned second fastener mounting holes 15, the lower mounting hole 15a located in the lower half of the electromagnetic protection cabin 10 is a circular hole for fixing the lower half 20a of the electromagnetic protection panel 20, while the upper mounting hole 15b located in the upper half of the electromagnetic protection cabin 10 is an oblong hole for fixing the upper half 20b of the electromagnetic protection panel 20, and a certain margin is included in the upper half 20b of the electromagnetic protection panel 20 along the long axis direction of the oblong hole, so as to better clamp the metal tail attachment housing 52 of the electrical connector 50.

[0102] Of course, the shapes of the lower mounting hole 15a and the upper mounting hole 15b in the second fastener mounting hole 15 can be swapped, or designed to have other shapes. Similarly, the second fastener mounting holes 15 on the interface flange 12 can be arranged asymmetrically to prevent the installation direction of the electromagnetic protection panel 20 on the electromagnetic protection cabin 10 from being reversed. The number of the second fastener mounting holes 15 is not limited to twelve, and those skilled in the art can change the number of the second fastener mounting holes 15 according to the actual situation. The above-mentioned variations should all fall within the protection scope of the present utility model.

[0103] The electromagnetic protection panel 20 is a sheet-like structure made of a thin metal plate material. As previously described, the electromagnetic protection panel 20 is composed of a first part or upper half 20b and a second part or lower half 20a that are butt-jointed to each other. The upper half 20b and the lower half 20a are butt-jointed to each other at the butt-joint line of the electromagnetic protection cabin 10.

[0104] At the butt-joint line of the lower half 20a and the upper half 20b of the electromagnetic protection panel 20, there are respectively provided paired first semi-circular openings 21a and second semi-circular openings 21b. The edges of the first semi-circular openings 21a and the second semi-circular openings 21b are bonded with first semi-circular sealing gaskets 22a and second semi-circular sealing gaskets 22b with a groove-shaped cross-section, as Figure 4B shown in the partial enlarged view of the first and second semi-circular sealing gaskets 22a and 22b. The first semi-circular openings 21a and the second semi-circular openings 21b, as well as the first semi-circular sealing gaskets 22a and the second semi-circular sealing gaskets 22b, also butt-joint with each other respectively when the lower half 20a and the upper half 20b of the electromagnetic protection panel 20 are butt-jointed together, forming a plurality of through-holes 21 for the power supply connectors 50 and the cables 53 to enter from the outside and be plugged into the electrical connector ends 41 of the protected electronic device 40. The number of the through-holes 21 can be appropriately configured according to the number of the electrical connectors 50 of the protected electronic device 40.

[0105] The first semi-circular sealing gasket 22a and the second semi-circular sealing gasket 22b are elastic sealing strip gaskets doped with metal particles and having conductivity. They are respectively fixed to the first semi-circular openings 21a and the second semi-circular openings 21b of the electromagnetic protection panel 20 in a radial direction, for example, by bonding or inlaying. Their outer rings are electrically lapped with the electromagnetic protection panel 20, and their inner rings are electrically lapped with at least a part of the electrical connector 50, such as the tail accessory housing 52 of the electrical connector 50, realizing the electrical continuity and electromagnetic sealing of the annular gap at the penetration of the electrical connector 50 through the cabin, thereby obtaining better electromagnetic protection efficiency.

[0106] The contact surface between the interface flange 12 of the electromagnetic protection cabin 10 and the electromagnetic protection panel 20 is prepared into an electrical lap joint surface through electrochemical treatment, realizing electrical lap joint and electrical continuity after the installation of the protection cabin of the aircraft electronic device is completed, thereby realizing the electromagnetic shielding efficiency.

[0107] The outer peripheral specification of the electromagnetic protection panel 20 can be slightly smaller than the outer peripheral specification of the interface flange 12 of the electromagnetic protection cabin 10 (for example, the reduction ratio is less than 10%), and a stepped portion is formed after the two are fastened together, as Figure 4C shown in the partial enlarged view. The stepped portion between the electromagnetic protection panel 20 and the interface flange 12 can be filled and sealed with a conductive sealant 24 to realize the sealing of the long-strip gap at the installation and mating interface between the electromagnetic protection panel 20 and the electromagnetic protection cabin 10 and electromagnetic shielding.

[0108] In a preferred embodiment, the length of the stepped portion is set to 3.5 mm × 2 mm to facilitate the lapping and adhesion of the conductive sealant 24. The conductive sealant 24 can be a liquid or paste sealant admixed with conductive metal particles, and can be implemented in any shape as needed for fillet sealing. After solidifying and shaping, it can play the role of electrical continuity and sealing.

[0109] In addition to using the conductive sealant 24 to implement fillet sealing as a protection form, the conductive sealant 24 can also be used to implement mating surface sealing on the contact surface of the interface flange 12 between the electromagnetic protection panel 20 and the electromagnetic protection cabin body 10.

[0110] The metal surfaces of the four peripheral edges of the electromagnetic protection panel 20 and the interface flange 12 of the electromagnetic protection cabin body 10 that are in contact with the conductive sealant 24 are prepared into electrical lapping surfaces through electrochemical treatment, and are electrically lapped through the conductive sealant 24 to achieve electrical continuity, thereby achieving the electromagnetic shielding effect.

[0111] As Figure 4A As shown in the partial enlarged view of the groove 25 in, the joint between the lower half 20a and the upper half 20b of the electromagnetic protection panel 20 can adopt a misaligned stepped alignment method, and the joint edge is chamfered to form a groove 25 of approximately 90° after the two panels are butted, so as to use the conductive sealant 24 for caulking sealing to achieve electrical continuity, thereby achieving the electromagnetic shielding effect.

[0112] Technical solutions such as the above-mentioned method of using a semi-circular sealing gasket for mating installation to achieve electromagnetic protection of the annular gap, using a conductive sealant for fillet sealing of the long strip-shaped gap to achieve electromagnetic protection of the annular gap, and both the sealing gasket and the sealant are made of a flexible sealing material admixed with conductive metal particles are applicable to the electromagnetic protection cabin design of various electronic devices, and are also applicable to the electromagnetic protection design of the housing of the airborne electronic devices on the aircraft.

[0113] Next, the operation steps and usage instructions of the protection cabin according to the present invention will be described in conjunction with the drawings.

[0114] Step 1: Install and fix the electromagnetic protection cabin body 10 to the aircraft structure by means of a plurality of first fasteners 14;

[0115] Step 2: Install and fix the protected electronic device 40 to the back plate 11 of the electromagnetic protection cabin body 10 by means of a plurality of third fasteners 18;

[0116] Step 3: Sleeve the socket end 51 of the electrical connector 50 together with the cable 53 onto the electrical connector end 41 of the airborne electronic device 40 of the aircraft;

[0117] Step 4: Install and fix the lower half 20a of the electromagnetic protection panel 20 located at the lower half of the electromagnetic protection cabin 10 to the interface flange 12 of the electromagnetic protection cabin 10 by means of a plurality of second fasteners 16;

[0118] Step 5: Then dock and install the upper half 20b of the electromagnetic protection panel 20 located at the upper half of the electromagnetic protection cabin 10 with the lower half 20a, press the annular gaps between the first and second semi-circular sealing gaskets 22a, 22b and the tail attachment housing 52 of the electrical connector 50, and install and fix the lower part 20b of the electromagnetic protection panel 20 to the interface flange 12 of the electromagnetic protection cabin 10 by means of the second fasteners 16, as Figure 5 shown;

[0119] Step 6: Use a conductive sealant 24 to fill and seal the approximately 90° groove 25 at the joint of the lower half 20a and the upper half 20b of the electromagnetic protection panel 20, and fill and seal the fillet at the stepped part of the four peripheral edges of the electromagnetic protection panel 20.

[0120] Although the structure and assembly process of the protection cabin for electronic devices according to the present invention have been described above in combination with the preferred embodiments and the drawings, those of ordinary skill in the art in this technical field should recognize that the above examples are only for illustration and cannot be used as a limitation to the present invention. Therefore, modifications and variations can be made to the present invention within the scope of the spirit of the claims, and these modifications and variations will all fall within the scope required by the claims of the present invention.

Claims

1. A protective cabin for an electronic device (40), comprising: An electromagnetic protection cabin body (10), wherein the electronic device (40) is accommodated in the internal space of the electromagnetic protection cabin body (10); And An electromagnetic protection panel (20) composed of a first part (20a) and a second part (20b) that are docked with each other. At least a pair of first semi-circular openings (21a) and second semi-circular openings (21b) are formed along the docking line of the first part (20a) and the second part (20b). Wherein, a first semi-circular sealing gasket (22a) and a second semi-circular sealing gasket (22b) with a groove-shaped cross-section are adhesively bonded to the edges of the first semi-circular opening (21a) and the second semi-circular opening (21b). When the first part (20a) and the second part (20b) of the electromagnetic protection panel (20) are docked together, the first semi-circular opening (21a), the second semi-circular opening (21b), the first semi-circular sealing gasket (22a), and the second semi-circular sealing gasket (22a) are also docked with each other respectively. The electronic device (40) is equipped with at least one electrical connector (50) that extends out of the electromagnetic protection panel (20) through the first semi-circular opening (21a) and the second semi-circular opening (21b). Wherein, after docking, the first semi-circular sealing gasket (22a) and the second semi-circular sealing gasket (22a) provide electromagnetic protection for the gap formed by the electrical connector (50) passing through the electromagnetic protection panel (20).

2. The protective cabin for an electronic device (40) according to claim 1, characterized in that, The electromagnetic protection cabin body (10) is composed of a back panel (11), each peripheral wall that surrounds the back panel (11) to form the internal space of the electromagnetic protection cabin body (10), and an interface flange (12) that is disposed opposite to the back panel (11) around the open side of the electromagnetic protection cabin body (10).

3. The protective cabin for an electronic device (40) according to claim 2, characterized in that, The electromagnetic protection panel (20) and the interface flange (12) are sized to form a stepped portion when fastened together. A conductive sealant (24) fills and seals the fillet of the stepped portion between the electromagnetic protection panel (20) and the interface flange (12). The conductive sealant (24) is preferably a liquid or paste sealant admixed with conductive metal particles.

4. The protective cabin for an electronic device (40) according to claim 3, characterized in that, The four peripheral edges of the electromagnetic protection panel (20) and the surfaces of the interface flange (12) that come into contact with the conductive sealant (24) are prepared as electrical lap joints and are electrically lapped via the conductive sealant (24).

5. The protective cabin for an electronic device (40) according to claim 1, wherein, The first part (20a) and the second part (20b) of the electromagnetic protection panel (20) are staggeredly stepped-docked at the docking line, and their joint edges are chamfered to form a groove (25) of approximately 90° after docking.

6. The protective cabin for an electronic device (40) according to claim 5, characterized in that, The groove (25) formed after the first part (20a) and the second part (20b) of the electromagnetic protection panel (20) are docked is filled with a conductive sealant (24). The conductive sealant (24) is preferably a liquid or paste sealant admixed with conductive metal particles.

7. The protective cabin for an electronic device (40) according to claim 1, characterized in that, The electromagnetic protection cabin (10) is provided with a set of multiple micro-circular holes (19) in each peripheral wall, preferably in the peripheral walls located at the top and bottom, for ventilation and liquid drainage of the internal space of the electromagnetic protection cabin (10).

8. The protective cabin for an electronic device (40) according to claim 2, characterized in that, The back plate (11) of the electromagnetic protection cabin (10) is provided with a plurality of first fastener mounting holes (13) on both sides thereof to mount and fix the electromagnetic protection cabin (10) to a predetermined structure. The first fastener mounting holes (13) are arranged asymmetrically with respect to the center of the back plate (11). The back plate (11) is preferably provided with a plurality of third fastener mounting holes (17) to mount and fix the electronic device (40) to the internal space of the electromagnetic protection cabin (10). The third fastener mounting holes (17) are arranged asymmetrically with respect to the center of the back plate (11).

9. The protective cabin for an electronic device (40) according to claim 2, characterized in that, The interface flange (12) is provided with a plurality of second fastener mounting holes (15), and the electromagnetic protection panel (20) is provided with a corresponding number of fourth fastener mounting holes (23) that cooperate with the second fastener mounting holes (15) to mount and fix the electromagnetic protection panel (20) to the interface flange (12). The second fastener mounting holes (15) and the fourth fastener mounting holes (23) are arranged asymmetrically with respect to the interface flange (12) and the electromagnetic protection panel (20).

10. The protective cabin for an electronic device (40) according to claim 9, characterized in that, Among the second fastener mounting holes (15), the mounting hole (15a) fixedly cooperating with the first part (20a) of the electromagnetic protection panel (20) has a first shape, and the mounting hole (15b) fixedly cooperating with the second part (20b) of the electromagnetic protection panel (20) has a second shape different from the first shape. The first shape is preferably a circular hole, and the second shape is preferably an oblong hole. And the electromagnetic protection cabin (10) adopts a thin-wall design. Among them, the thickness of the back plate (11) is preferably 3 mm, and the thicknesses of each peripheral wall and the interface flange (12) are preferably 2 mm.

11. The protective cabin for an electronic device (40) according to claim 1, characterized in that, The first semi-circular sealing gasket (22a) and the second semi-circular sealing gasket (22a) are made of an elastic material admixed with conductive metal particles, and are preferably fixed to the first semi-circular opening (21a) and the second semi-circular opening (21b) by bonding or inlaying. The outer ring thereof is electrically lapped with the electromagnetic protection panel (20), and the inner ring thereof is electrically lapped with at least a part of the electrical connector (50).

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