Detection device for electromagnetic shielding

Abstract

The utility model relates to the technical field of electromagnetic interference detection, in particular to a detection device for electromagnetic shielding, which comprises a box body, one side of the box body is rotatably connected with a box door through a hinge, any inner wall of the box body is fixedly connected with a main wave absorbing plate, one side of the box door is fixedly connected with an auxiliary wave absorbing plate, the box door is provided with a shielding mechanism in a matched manner, and the shielding mechanism is provided with a shielding mechanism. The shielding mechanism is provided with a fastening mechanism in a matched mode. According to the utility model, the biconical antenna and the equipment are placed in the box body, the box door is closed to enable the sponge frame to be sleeved on the sleeve frame, and the line connected with the equipment and the biconical antenna passes through the L-shaped groove and the threading hole on the baffle plate and then is electrified, so that the gap between the box body and the box door and the gap between the jack and the line are blocked by the wave-absorbing material; the influence of external electromagnetic waves on equipment in the box body is reduced, meanwhile, the situation that radiation in the box body leaks to the outside is reduced, and the box can be repeatedly used and is convenient for users to use.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic interference detection, in particular to a detection device for electromagnetic shielding. Background Technique

[0002] Radiated interference, also known as electromagnetic interference (EMI), refers to the phenomenon that the electromagnetic energy generated by electronic devices during operation inadvertently spreads to the surrounding environment and affects the normal operation of other electronic devices. Radiated interference not only stems from the electromagnetic emissions of the device itself but may also be caused by the external electromagnetic environment. When it is necessary to detect the device under test and obtain the radiated interference data of the device under test, the data of the device under test can be obtained through electromagnetic interference detection. During electromagnetic interference testing, the device together with the biconical antenna is placed inside the shielding box. The shielding box is used to reduce the influence of external electromagnetic waves on the inside of the box. At the same time, the absorbing material on the shielding box is used to absorb the electromagnetic waves inside the box to prevent the radiation generated by the devices inside the box from leaking to the outside. Then, the biconical antenna is used to capture and measure the electromagnetic energy inside the box, thereby obtaining the test data of the device under test. However, due to reasons such as the absorbing material, there may be gaps between the absorbing materials at the door and the opening of the general shielding box, resulting in external electromagnetic waves entering the box and affecting the accuracy of the data. Although the attached absorbing material can be used to attach to the gaps at the box and the door to improve the overall sealing of the box, the attached material needs to be manually attached and removed by personnel, the process is relatively cumbersome, and it is difficult to be reused, which is rather inconvenient. Content of the Utility Model

[0003] The purpose of the utility model is to provide a detection device for electromagnetic shielding to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A detection device for electromagnetic shielding includes a box body, and a box door is rotatably connected to one side of the box body through a hinge. A main absorbing plate is fixedly connected to any inner wall of the box body, and a secondary absorbing plate is fixedly connected to one side of the box door. The box door is provided with a shielding mechanism, and the shielding mechanism is provided with a fastening mechanism;

[0006] The shielding mechanism includes a box body, and the inner side wall of the box body is detachably connected to the outer side wall of the box door. A fixed frame is fixedly sleeved on the outside of the opening of the box body, and a sponge frame is fixedly connected to one side of the fixed frame. A sleeve frame is fixedly sleeved on the outer side wall of the box body, and the sleeve frame is movably sleeved inside the sponge frame.

[0007] Furthermore, on one side of the box door and one side of the secondary wave-absorbing plate, a plurality of jacks are provided. The jacks are provided with matching baffles. In the center of one side of any baffle, an L-shaped groove is provided, and on one side of any baffle, a C-shaped cylinder is fixedly connected. The C-shaped cylinders are all movably inserted into the adjacent jacks.

[0008] Furthermore, a plurality of wire passing holes are provided on the inner wall of one side of the box body.

[0009] Furthermore, the fastening mechanism includes a connecting block, and rectangular through holes are provided on the top surface of the connecting block. An annular groove is provided on the outer side wall of the sponge frame, and a pull rope is arranged inside the annular groove. The pull rope surrounds the inside of the annular groove, and both ends of the pull rope penetrate through the bottom end of the rectangular through hole. A sleeve ring is arranged above the connecting block, and both ends of the pull rope are fixedly connected to the outer side wall of the sleeve ring.

[0010] Furthermore, a screw rod is rotatably connected to the top surface of the connecting block, and an internally threaded ring is screwed on the outer side wall of the screw rod. A pull rod is fixedly connected to the outer side wall of the internally threaded ring, and one end of the pull rod penetrates through the inside of the sleeve ring.

[0011] Furthermore, a circular through hole is provided on the outer side wall of the pull rod, and a positioning rod is fixedly connected to the top surface of the connecting block. The outer side wall of the positioning rod is slidably sleeved with the inner side wall of the circular through hole.

[0012] Furthermore, a handle is fixedly connected to the other side of the fixed frame, and a plurality of legs are fixedly connected to the bottom surface of the box body.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] By placing the double-cone antenna and the device inside the box body, then closing the box door for electromagnetic interference detection, sleeving the sponge frame on the sleeve frame, and passing the lines connected to the device and the double-cone antenna through the L-shaped grooves and wire passing holes on the baffle and then energizing, the gaps between the box body and the box door, as well as the gaps between the jacks and the lines, are blocked by the wave-absorbing material, reducing the influence of external electromagnetic waves on the devices inside the box body, and at the same time reducing the leakage of radiation inside the box body to the outside. It can be reused and is convenient for the user to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the box body and the shielding mechanism in the present utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the box body in the present utility model;

[0018] Figure 4 is a schematic diagram of the cross-sectional structure of the baffle and the C-shaped cylinder in the present utility model;

[0019] Figure 5 It is an exploded view of the structure of the shielding mechanism in the present utility model;

[0020] Figure 6 It is an exploded view of the structure of the fastening mechanism in the present utility model.

[0021] In the figure: 100, the box body; 101, the main wave-absorbing plate; 110, the leg; 120, the sleeve frame; 200, the box door; 201, the jack; 210, the secondary wave-absorbing plate; 220, the baffle; 221, the L-shaped groove; 230, the C-shaped cylinder; 300, the shielding mechanism; 310, the box body; 311, the wire-passing hole; 320, the fixing frame; 321, the handle; 330, the sponge frame; 331, the annular groove; 400, the fastening mechanism; 410, the connecting block; 420, the screw; 430, the pull rope; 431, the sleeve ring; 440, the internally threaded ring; 441, the positioning rod; 442, the pull rod. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 6 , in the embodiment of the present utility model, a detection device for electromagnetic shielding includes a box body 100, and a box door 200 is rotatably connected to one side of the box body 100 through a hinge. A main wave-absorbing plate 101 is fixedly connected to any inner wall of the box body 100, and a secondary wave-absorbing plate 210 is fixedly connected to one side of the box door 200. The box door 200 is provided with a matching shielding mechanism 300, and the shielding mechanism 300 is provided with a matching fastening mechanism 400;

[0024] The shielding mechanism 300 includes a box body 310, and the inner side wall of the box body 310 is detachably connected to the outer side wall of the box door 200. A fixing frame 320 is fixedly sleeved on the outside of the opening of the box body 310, and a sponge frame 330 is fixedly connected to one side of the fixing frame 320. A sleeve frame 120 is fixedly sleeved on the outer side wall of the box body 100, and the sleeve frame 120 is movably sleeved inside the sponge frame 330.

[0025] Specifically, the box body 100 and the box door 200 form a shielding box. The sponge frame 330 and the box body 310 are both made of flat sponge absorbing materials, which are soft materials. The sleeve frame 120, the main absorbing board 101, the secondary absorbing board 210 and the fixing frame 320 are all made of rigid foam absorbing materials. When in use, the equipment to be tested and the biconical antenna are placed inside the box body 100 together, and then the box door 200 is rotated to close the inside of the box body 100, so that the main absorbing board 101 and the secondary absorbing board 210 reflect and absorb electromagnetic waves, preventing external electromagnetic interference from entering the box, and at the same time preventing the radiation generated by the equipment inside the box from leaking to the outside. Then, the user can put the box body 310 on the box door 200, and make the sponge frame 330 sleeved on the sleeve frame 120. The length and width inside the sponge frame 330 are smaller than the length and width of one side of the sleeve frame 120, and the sponge frame 330 can be fixed on the sleeve frame 120 by its own sponge elasticity. The electromagnetic wave leakage that may occur at the box body 100 and the box door 200 can be blocked and absorbed by the sponge frame 330, the sleeve frame 120, the box body 310 and the fixing frame 320, improving the sealing performance of the box body 100, thereby improving the accuracy of electromagnetic detection, and it can be reused, with a convenient use process and being easy for the user to use.

[0026] Embodiment 1

[0027] As Figures 2 - 4 shown, in this embodiment, a plurality of jacks 201 are opened on one side of the box door 200 and one side of the secondary absorbing board 210. The jacks 201 are provided with matching baffles 220. A central position on one side of any baffle 220 is provided with an L-shaped groove 221, and a C-shaped cylinder 230 is fixedly connected to one side of any baffle 220. The C-shaped cylinders 230 are all movably inserted into the adjacent jacks 201, and a plurality of wire passing holes 311 are opened on an inner wall of the box body 310.

[0028] In this embodiment, when the biconical antenna and the equipment are placed inside the box body 100, the wires connected to the biconical antenna and the equipment can be passed through the L-shaped groove 221 on the baffle 220 and the wire passing holes 311 on the box body 310 and then connected to the external circuit. Then, the C-shaped cylinders 230 on the baffles 220 are inserted into the adjacent jacks 201. The C-shaped cylinders 230 and the baffles 220 are both made of soft sponge absorbing materials. The C-shaped cylinders 230 and the jacks 201 are in interference fit, and the L-shaped groove 221 and the wires are in interference fit, so that electromagnetic waves are not easily leaked from the gaps between the wires and the L-shaped groove 221 and the gaps between the C-shaped cylinders 230 and the jacks 201.

[0029] As Figures 5 - 6As shown, in this embodiment, the fastening mechanism 400 includes a connecting block 410. Rectangular through holes are formed in the top surface of the connecting block 410. An annular groove 331 is formed in the outer side wall of the sponge frame 330. A pull rope 430 is arranged inside the annular groove 331. The pull rope 430 surrounds the inside of the annular groove 331. Both ends of the pull rope 430 penetrate through the bottom end of the rectangular through hole. A collar 431 is arranged above the connecting block 410. Both ends of the pull rope 430 are fixedly connected to the outer side wall of the collar 431. A screw rod 420 is rotatably connected to the top surface of the connecting block 410. An internally threaded ring 440 is screwed on the outer side wall of the screw rod 420. A pull rod 442 is fixedly connected to the outer side wall of the internally threaded ring 440. One end of the pull rod 442 penetrates through the inside of the collar 431. A circular through hole is formed in the outer side wall of the pull rod 442. A positioning rod 441 is fixedly connected to the top surface of the connecting block 410. The outer side wall of the positioning rod 441 is slidably sleeved with the inner side wall of the circular through hole.

[0030] During specific implementation, the user can manually rotate the screw rod 420 to drive the internally threaded ring 440 to move on the screw rod 420, so that the pull rod 442 drives the collar 431 and both ends of the pull rope 430 to move upward synchronously, making the pull rope 430 tighten the annular groove 331. Thus, when the sleeve frame 120 is located inside the sponge frame 330, the annular groove 331 part of the sponge frame 330 is constricted to a certain extent, wrapping the sleeve frame 120 inside the sponge frame 330 to further improve the connection tightness between the sponge frame 330 and the sleeve frame 120. The positioning rod 441 can limit the pull rod 442 and the internally threaded ring 440, so that when the screw rod 420 rotates, it can drive the pull rod 442 and the internally threaded ring 440 to move upward steadily.

[0031] Embodiment Two

[0032] On the basis of Embodiment One, a handle 321 is provided to facilitate the use by the user.

[0033] As Figures 1 - 3 shown, in this embodiment, a handle 321 is fixedly connected to the other side of the fixed frame 320. A plurality of legs 110 are fixedly connected to the bottom surface of the box body 100.

[0034] During specific implementation, the handle 321 is provided to facilitate the user to hold the handle 321 and drive the box door 200 to rotate. And due to the plurality of legs 110, the box body 100 has a certain distance from the tabletop, so that the tabletop is not likely to affect the movement of the box door 200 and the sponge frame 330.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0036] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detection device for electromagnetic shielding, comprising a box body (100), and a box door (200) is rotatably connected to one side of the box body (100) through a hinge, characterized in that, Any inner wall of the box body (100) is fixedly connected with a main wave-absorbing plate (101), and a secondary wave-absorbing plate (210) is fixedly connected to one side of the box door (200). The box door (200) is provided with a shielding mechanism (300), and the shielding mechanism (300) is provided with a fastening mechanism (400). The shielding mechanism (300) includes a box body (310), and the inner side wall of the box body (310) is detachably connected to the outer side wall of the box door (200). A fixing frame (320) is fixedly sleeved on the outer side of the opening of the box body (310), and a sponge frame (330) is fixedly connected to one side of the fixing frame (320). A sleeve frame (120) is fixedly sleeved on the outer side wall of the box body (100), and the sleeve frame (120) is movably sleeved inside the sponge frame (330).

2. The detection device for electromagnetic shielding according to claim 1, wherein A plurality of jacks (201) are opened on one side of the box door (200) and one side of the secondary wave-absorbing plate (210). The jacks (201) are provided with baffles (220). An L-shaped groove (221) is opened at the center of one side of any baffle (220), and a C-shaped cylinder (230) is fixedly connected to one side of any baffle (220). The C-shaped cylinders (230) are all movably inserted into the adjacent jacks (201).

3. The detection device for electromagnetic shielding according to claim 2, characterized in that, A plurality of wire passing holes (311) are opened on one inner wall of the box body (310).

4. The detection device for electromagnetic shielding according to claim 3, characterized in that, The fastening mechanism (400) includes a connecting block (410), and rectangular through holes are opened on the top surface of the connecting block (410). An annular groove (331) is opened on the outer side wall of the sponge frame (330), and a pulling rope (430) is arranged inside the annular groove (331). The pulling rope (430) surrounds the inside of the annular groove (331), and both ends of the pulling rope (430) penetrate through the bottom end of the rectangular through hole. A sleeve ring (431) is arranged above the connecting block (410), and both ends of the pulling rope (430) are fixedly connected to the outer side wall of the sleeve ring (431).

5. The detection device for electromagnetic shielding according to claim 4, characterized in that, A screw rod (420) is rotatably connected to the top surface of the connecting block (410), and an internal thread ring (440) is screwed on the outer side wall of the screw rod (420). A pull rod (442) is fixedly connected to the outer side wall of the internal thread ring (440), and one end of the pull rod (442) penetrates through the inside of the sleeve ring (431).

6. The detection device for electromagnetic shielding according to claim 5, characterized in that, A circular through hole is opened on the outer side wall of the pull rod (442), and a positioning rod (441) is fixedly connected to the top surface of the connecting block (410). The outer side wall of the positioning rod (441) is slidably sleeved with the inner side wall of the circular through hole.

7. The detection device for electromagnetic shielding according to claim 6, wherein, A handle (321) is fixedly connected to the other side of the fixing frame (320), and a plurality of legs (110) are fixedly connected to the bottom surface of the box body (100).

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