Electromagnetic shielding damping case

Abstract

The utility model discloses an electromagnetic shielding damping case, which belongs to the technical field of detection equipment and comprises a case body, a shielding box is connected to an inner cavity of the case body and composed of electromagnetic shielding sealing gaskets, and a fixing box is connected to the inner wall of the shielding box. The damping assembly comprises a placing box and four connecting frames, the centripetal sides of the four connecting frames are fixedly connected with the placing box, the inner side walls of the connecting frames are rotationally connected with connecting plates through pin shafts, the side faces of the connecting plates are connected with piston parts of buffer pieces, and the fixed ends of the buffer pieces are connected with rotating plates; the side face of the rotating plate is rotationally connected with a rotating frame through a pin shaft, the outer side wall of the rotating frame is connected with a limiting plate, the side, away from the rotating frame, of the limiting plate is rotationally connected with a limiting frame through a pin shaft, and the centrifugal sides of the four limiting frames are fixedly connected with the inner side wall of the fixed box. The damping device can buffer and absorb shock of electronic equipment for aviation aircrafts in multiple directions, and has an electromagnetic shielding function at the same time.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing equipment, and in particular to an electromagnetic shielding and shock-absorbing chassis. Background Technology

[0002] With the rapid development of electronic technology, electronic devices have been widely used in various fields, such as the electronic equipment used in aircraft. In many application scenarios, electronic devices need to operate stably in complex electromagnetic environments, requiring electromagnetic shielding. Although some chassis on the market have certain electromagnetic shielding functions, their vibration reduction effect is not good.

[0003] In related technologies, a search revealed a Chinese patent document (authorization announcement number CN210725641U) for an electromagnetic shielding and vibration damping enclosure, comprising a fiberglass square cylinder, two sets of protective plates, and two sets of pressure strip frames. The inner wall of the fiberglass square cylinder is reinforced with a copper mesh I through fiberglass cloth. The two ends of the copper mesh I extend out of the two openings of the fiberglass square cylinder by 3cm each. The protective plates are frame-shaped structures, and a copper mesh II is provided on one end face of the protective plate. The two ends of the pressure strip frames are provided with inwardly vertically folded reinforcing ribs. The two sets of protective plates are respectively set at both ends of the inner cavity of the fiberglass square cylinder. The copper mesh II on each set of protective plates and the corresponding extended section of the copper mesh I are pressed into the inner cavity of the fiberglass square cylinder through the pressure strip frames. This electromagnetic shielding and vibration damping enclosure metallizes the fiberglass square cylinder, ensuring the continuity of conductivity between the protective plate and the metallized fiberglass square cylinder, thus achieving overall continuity of conductivity within the enclosure. This avoids external electromagnetic interference and ensures the accuracy of test data. However, the vibration damping effect of this electromagnetic shielding and vibration damping enclosure is relatively weak and cannot meet the requirements of electronic equipment used in aircraft. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetically shielded and shock-absorbing chassis to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electromagnetically shielded shock-absorbing enclosure, comprising:

[0006] The main body of the chassis has a shielding box connected to its inner cavity. The shielding box is made of an electromagnetic shielding sealing gasket, and a fixing box is connected to the inner wall of the shielding box.

[0007] The shock absorption assembly is located inside the fixed box. The shock absorption assembly includes a placement box and four connecting brackets. The centripetal side of the four connecting brackets is connected and fixed to the placement box. The inner side wall of the connecting bracket is rotatably connected to a connecting plate via a pin. The piston part of the buffer is connected to the side of the connecting plate. The fixed end of the buffer is connected to a rotating plate. The side of the rotating plate is rotatably connected to a rotating bracket via a pin. The outer side wall of the rotating bracket is connected to a limiting plate. The side of the limiting plate away from the rotating bracket is rotatably connected to a limiting bracket via a pin. The centrifugal side of the four limiting brackets is connected and fixed to the inner side wall of the fixed box.

[0008] Preferably, the buffer includes a telescopic inner rod, a damper, and a hollow telescopic outer rod. The damper and the telescopic inner rod are both located in the inner cavity of the telescopic outer rod. A chassis cover is provided on the top surface of the main body of the chassis. The inner top wall of the chassis cover abuts against the main body of the chassis, the shielding box, and the fixing box, respectively.

[0009] Preferably, the inner wall of the chassis cover is slidably connected to the outer wall of the chassis body, and a rubber frame is provided on the upper part of the shock absorption component.

[0010] Preferably, a fixing plate is adhered to the inner wall of the rubber frame, and a threaded post is connected to the top surface of the fixing plate.

[0011] Preferably, the top surface of the chassis cover has a through groove for the threaded post to pass through, and the threaded post is threadedly connected to a fixing nut.

[0012] Preferably, the bottom surface of the fixing nut abuts against the chassis cover, and four positioning rods are slidably connected within the bottom surface of the chassis cover.

[0013] Preferably, the bottom surfaces of all four positioning rods are connected and fixed to the fixing plate, and the top surface of the rubber frame abuts against the chassis cover.

[0014] Preferably, the inner cavity of the fixing box fits into the rubber frame.

[0015] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0016] This electromagnetic shielding and vibration damping enclosure is designed for electronic equipment used in aircraft. The enclosure, constructed from electromagnetic shielding gaskets, provides electromagnetic shielding, ensuring stable operation of the electronic equipment in complex electromagnetic environments. When vibration occurs, the piston of the buffer component moves, providing cushioning and shock absorption. This protects the electronic equipment within the enclosure. Vertical rotation between the connecting frame and connecting plate, vertical rotation between the rotating plate and rotating frame, and horizontal rotation between the limiting plate and limiting frame allow for vertical and horizontal movement of the enclosure, achieving multi-directional cushioning and shock absorption for the electronic equipment and enhancing its overall cushioning and shock absorption effect.

[0017] This electromagnetic shielding and vibration damping enclosure, secured by a fixing nut, connects and fixes the threaded post to the enclosure cover. Simultaneously, four positioning rods penetrate the enclosure cover, providing positional fixation for the fixing plate and rubber frame. The fixing plate is then fixed to the supporting rubber frame. When the rubber frame extends into the inner cavity of the enclosure, it seals and shields the inner wall structure, enhancing the precision of the enclosure's components. The fixing nut also allows for easy access to the threaded post, facilitating disassembly, maintenance, and repair of the fixing plate and rubber frame, thus improving the ease of use of the electromagnetic shielding and vibration damping enclosure. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the main body of the chassis of this utility model;

[0021] Figure 3 For the present utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the structure of the shock absorption component of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the buffer and the limiting frame of this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the chassis cover of this utility model;

[0025] Figure 7 This is a schematic diagram of the chassis cover of this utility model from another perspective.

[0026] Explanation of reference numerals in the attached figures:

[0027] In the diagram: 1. Chassis body; 2. Shielding box; 3. Fixing box; 4. Shock absorption assembly; 5. Placement box; 6. Connecting frame; 7. Connecting plate; 8. Buffer component; 9. Rotating plate; 10. Rotating frame; 11. Limiting plate; 12. Limiting frame; 13. Chassis cover; 14. Rubber frame; 15. Fixing plate; 16. Positioning rod; 17. Threaded post; 18. Fixing nut. Detailed Implementation

[0028] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0029] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0030] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0031] Please see Figures 1 to 7 An electromagnetically shielded and vibration-damping enclosure, in this embodiment including:

[0032] The main body of the chassis 1 is connected to the inner cavity of the main body of the chassis 1. The shielding box 2 is made of electromagnetic shielding gasket. Various electronic devices are used in aircraft. In order to enhance the stability of the operation of various electronic devices, electromagnetic shielding is required for the electronic devices. The shielding box 2, which is made of electromagnetic shielding gasket, has electromagnetic shielding function, so that the electronic devices inside the shielding box 2 can be used stably. The inner wall of the shielding box 2 is connected to the fixing box 3.

[0033] The shock-absorbing assembly 4 is located inside the fixed box 3. The shock-absorbing assembly 4 includes a placement box 5 and four connecting brackets 6. The placement box 5 is used to install and fix electronic equipment. The connecting brackets 6 are horizontally C-shaped. The four connecting brackets 6 are fixed to the placement box 5 on their concentric sides. A connecting plate 7 is rotatably connected to the inner wall of the connecting bracket 6 via a pin, allowing vertical rotation between the connecting plate 7 and the connecting bracket 6. The piston part of a buffer 8 is connected to the side of the connecting plate 7. A rotating plate 9 is connected to the fixed end of the buffer 8. A rotating frame 10 is rotatably connected to the side of the rotating plate 9 via a pin. The rotating frame 10 is horizontally C-shaped, and its inner wall is rotatably connected to the rotating plate 9 via a pin, allowing the rotating plate 9 to be located on the inner wall of the rotating frame 10. The device rotates vertically. When the electronic device inside the placement box 5 is vibrated, the placement box 5 moves vertically, causing the pistons of the four buffers 8 to move, providing vertical buffering and shock absorption for the electronic device. The outer wall of the rotating frame 10 is connected to a limiting plate 11. The side of the limiting plate 11 away from the rotating frame 10 is rotatably connected to a limiting frame 12 via a pin. The limiting frame 12 is in a vertical C-shape, allowing the limiting frame 12 and the limiting plate 11 to rotate laterally, so that the placement box 5 can move laterally. This provides multi-directional buffering and shock absorption for the electronic device inside the placement box 5, enhancing the buffering and shock absorption effect of the electromagnetic shielding shock absorption enclosure. The centrifugal side of each of the four limiting frames 12 is connected and fixed to the inner wall of the fixed box 3.

[0034] The buffer component 8 includes a telescopic inner rod, a damper, and a hollow telescopic outer rod. Both the damper and the telescopic inner rod are located within the cavity of the telescopic outer rod. The fixed end of the damper is connected and fixed to the telescopic outer rod, and the moving end of the damper is connected and fixed to the telescopic inner rod. The end of the telescopic inner rod furthest from the damper is connected and fixed to the connecting plate 7. The end face of the telescopic outer rod is connected and fixed to the rotating plate 9. Sufficient clearance exists between the inner surface of the telescopic outer rod and the curved surface of the telescopic inner rod, providing ample conditions for the movement of the moving end of the damper. A cover 13 is provided on the top surface of the main body 1. The main body 1, the shielding box 2, and the fixing box 3 all have openings at the top. The cover 13 is used to cover the top openings of the main body 1, the shielding box 2, and the fixing box 3. The inner top wall of the cover 13 abuts against the main body 1, the shielding box 2, and the fixing box 3 respectively. The inner side wall of the cover 13 is slidably connected to the outer side wall of the main body 1. A rubber frame 14 is provided on the upper part of the shock absorption component 4. A fixing plate 15 is glued to the inner side wall of the rubber frame 14. A threaded post 17 is connected to the top surface of the fixing plate 15. A through groove is opened on the top surface of the cover 13 for the threaded post 17 to pass through. A fixing nut 18 is threadedly connected to the threaded post 17. The bottom surface of the fixing nut 18 abuts against the cover 13. Four positioning rods 16 are slidably connected to the bottom surface of the cover 13. The bottom surfaces of the four positioning rods 16 are all connected and fixed to the fixing plate 15. The top surface of the rubber frame 14 abuts against the cover 13. The inner cavity of the fixing box 3 fits with the rubber frame 14.

[0035] To protect the electronic equipment used in aircraft, the electronic equipment is placed in the housing 5. When subjected to external vibrations, the shock-absorbing component 4 provides cushioning and shock absorption for the electronic equipment. The connecting plate 7 rotates vertically on the inner wall of the connecting frame 6, and the rotating plate 9 rotates vertically on the inner wall of the rotating frame 10. During the transmission process, the housing 5 can move vertically. When vibration occurs, the piston part of the buffer 8 moves to provide vertical cushioning and shock absorption for the electronic equipment. The limiting plate 11 rotates horizontally on the inner wall of the limiting frame 12. During the transmission process, the housing 5 can move horizontally. The buffer 8 can provide horizontal cushioning and shock absorption for the electronic equipment in the housing 5, realizing the multi-directional cushioning and shock absorption function of the electromagnetic shielding shock-absorbing enclosure, enhancing the protection effect of the electronic equipment used in aircraft. The electronic equipment is placed in the shielding box 2 composed of electromagnetic shielding sealing gaskets to achieve electromagnetic shielding for the electronic equipment.

[0036] To provide shielding protection for the electronic equipment used in aircraft, threaded posts 17 and four positioning rods 16 pass through the chassis cover 13. When the chassis cover 13 covers the top opening of the chassis body 1, the rubber frame 14 extends into the inner cavity of the fixed box 3 for sealing and shielding. At the same time, the fixed plate 15 provides support and fixation for the rubber frame 14. The fixed plate 15 and the rubber frame 14 can be disassembled for maintenance. Since the electronic equipment in the fixed box 3 will generate heat during use, a heat dissipation structure can be set according to actual usage requirements.

[0037] The buffer 8 is existing technology. Its working principle, size and model are not related to the function of this application, so it will not be described in detail. The control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0038] Working principle

[0039] When the electronic equipment of the aircraft is placed on the top surface of the placement box 5, the connecting frame 6 and the connecting plate 7 rotate relative to each other, the rotating frame 10 and the rotating plate 9 rotate relative to each other, and the limiting frame 12 and the limiting plate 11 rotate relative to each other, pulling the piston parts of the four buffer parts 8 to move, thus providing multi-directional buffering and shock absorption for the electronic equipment. The shielding box 2 provides electromagnetic shielding.

[0040] The chassis cover 13 covers the top opening of the chassis body 1, and under the fixed support of the fixing plate 15, the rubber frame 14 extends into the inner cavity of the fixing box 3 to seal and shield, thereby enhancing the protection of electronic equipment. The fixing nut 18 can be contacted to fix the position of the threaded post 17, so that the four positioning rods 16 can be disengaged from the chassis cover 13, and the fixing plate 15 and the rubber frame 14 can be maintained and protected.

[0041] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electromagnetically shielded shock-absorbing chassis, characterized in that, include: The main body of the chassis (1) is connected to a shielding box (2) in the inner cavity of the main body of the chassis (1). The shielding box (2) is made of an electromagnetic shielding sealing gasket. The inner wall of the shielding box (2) is connected to a fixing box (3). The shock-absorbing assembly (4) is located in the inner cavity of the fixed box (3). The shock-absorbing assembly (4) includes a placement box (5) and four connecting frames (6). The four connecting frames (6) are fixed to the placement box (5) on the centripetal side. The inner wall of the connecting frame (6) is rotatably connected to a connecting plate (7) via a pin. The piston part of the buffer (8) is connected to the side of the connecting plate (7). The fixed end of the buffer (8) is connected to a rotating plate (9). The side of the rotating plate (9) is rotatably connected to a rotating frame (10) via a pin. The outer wall of the rotating frame (10) is connected to a limiting plate (11). The side of the limiting plate (11) away from the rotating frame (10) is rotatably connected to a limiting frame (12) via a pin. The centrifugal side of the four limiting frames (12) is fixedly connected to the inner wall of the fixed box (3).

2. The electromagnetic shielding and vibration damping enclosure according to claim 1, characterized in that: The buffer (8) includes a telescopic inner rod, a damper and a hollow telescopic outer rod. The damper and the telescopic inner rod are both located in the inner cavity of the telescopic outer rod. The top surface of the chassis body (1) is provided with a chassis cover (13). The inner top wall of the chassis cover (13) abuts against the chassis body (1), the shielding box (2) and the fixing box (3) respectively.

3. The electromagnetic shielding and vibration damping enclosure according to claim 2, characterized in that: The inner wall of the chassis cover (13) is slidably connected to the outer wall of the chassis body (1), and a rubber frame (14) is provided on the upper part of the shock absorption component (4).

4. The electromagnetic shielding and vibration damping enclosure according to claim 3, characterized in that: A fixing plate (15) is bonded to the inner wall of the rubber frame (14), and a threaded post (17) is connected to the top surface of the fixing plate (15).

5. The electromagnetic shielding and vibration damping enclosure according to claim 4, characterized in that: The top surface of the chassis cover (13) is provided with a through groove for the threaded post (17) to pass through, and the threaded post (17) is threadedly connected to a fixing nut (18).

6. The electromagnetic shielding and vibration damping enclosure according to claim 5, characterized in that: The bottom surface of the fixing nut (18) abuts against the chassis cover (13), and four positioning rods (16) are slidably connected to the bottom surface of the chassis cover (13).

7. The electromagnetic shielding and vibration damping enclosure according to claim 6, characterized in that: The bottom surfaces of the four positioning rods (16) are all connected and fixed to the fixing plate (15), and the top surface of the rubber frame (14) abuts against the chassis cover (13).

8. The electromagnetic shielding and vibration damping enclosure according to claim 7, characterized in that: The inner cavity of the fixed box (3) fits into the rubber frame (14).

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