EMC shielding device

Abstract

The EMC shielding device comprises a shielding plate and a shielding cover, the shielding cover is installed at the upper end of the shielding plate in an inserted mode, a supporting seat is fixedly installed in the middle of the upper end of the shielding plate, a plurality of clamping plates are arranged on the periphery of the supporting seat, the lower ends of the clamping plates are attached to the upper end of the shielding plate, and a plurality of extending plates are fixedly installed on the periphery of the supporting seat. The multiple clamping plates and the extending plates are distributed in a staggered mode, a movable plate connected with the clamping plates on the two sides in an inserted mode is slidably installed in each extending plate, threaded rods connected with the two rotating bases in a threaded mode are rotatably installed on the two sides of the connecting base respectively, and gear rings connected with the threaded rods on the two sides in a meshed mode are rotatably installed on the periphery of the supporting base. A limiting sliding cavity is formed in the extending plate, the movable plate is installed in the limiting sliding cavity in a sliding mode, limiting inserting cavities are formed in the two sides of the clamping plate, and the outer end of the movable plate is connected with the limiting inserting cavities in an inserted mode.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic compatibility, and specifically relates to an EMC shielding device. Background Technique

[0002] To ensure the normal operation of equipment and improve the stability of the system, electromagnetic compatibility equipment (Electromagnetic Compatibility, abbreviated as EMC) is usually adopted. Through its peripheral shielding device, electrical components are protected to avoid interference from external electromagnetic fields. When the existing shielding device is in use, the electrical components are positioned inside it to ensure the stability of the electrical components. However, the internal positioning structure of the existing shielding device mainly adopts a fixed setting. This leads to the situation that when the size of the electrical component changes, this fixed-positioning structure will no longer be able to position the electrical component, which obviously has relatively large defects. For this reason, we have proposed an EMC shielding device. Content of the Utility Model

[0003] The purpose of the utility model is to provide an EMC shielding device to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an EMC shielding device, including a shielding plate and a shielding cover. The shielding cover is inserted and installed at the upper end of the shielding plate. A support seat is fixedly installed in the middle of the upper end of the shielding plate. A plurality of clamping plates are arranged outside the support seat. The lower ends of the clamping plates are attached to the upper end of the shielding plate. A plurality of extension plates are fixedly installed outside the support seat. The plurality of clamping plates and the extension plates are arranged in a staggered manner. A movable plate inserted into the two clamping plates on both sides is slidably installed in each extension plate. Rotating seats are respectively rotatably installed at the lower ends of two clamping plates arranged diagonally. A connecting seat is rotatably installed outside the support seat. Threaded rods respectively connected to the two rotating seats are rotatably installed on both sides of the connecting seat. A toothed ring meshed with the two threaded rods is rotatably installed outside the support seat.

[0005] Preferably, a limiting sliding cavity is opened in the extension plate. The movable plate is slidably installed in the limiting sliding cavity. Limiting insertion cavities are opened on both sides of the clamping plate. The outer end of the movable plate is inserted into the limiting insertion cavity.

[0006] Preferably, a movable ring is fixedly installed in the middle of the connecting seat. The movable ring is rotatably installed outside the support seat. The toothed ring is arranged above the movable ring.

[0007] Preferably, a first limiting seat and a second limiting seat are respectively fixedly installed on the inner and outer sides of the connecting seat. The threaded rod is rotatably installed between the first limiting seat and the second limiting seat.

[0008] Preferably, an annular limiting groove is formed at the upper end of the shielding plate, and an arc-shaped limiting block is arranged at the lower side of the connecting seat. The arc-shaped limiting block is slidably installed in the annular limiting groove.

[0009] Preferably, a limiting rotating cavity is formed on the outer side of the second limiting seat, and a limiting insertion hole is formed at the lower side of the limiting rotating cavity. A positioning screw rod inserted into the limiting insertion hole is fixedly installed at the upper end of the arc-shaped limiting block, and a threaded plate threadedly connected with the positioning screw rod is rotatably installed in the limiting rotating cavity.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] For the EMC shielding device, through the rotational connection between the connecting seat and the supporting seat, the rotating seat and the clamping plate on its upper side can be rotated, so that the positions of the clamping plates match the shape of the electrical components. Through the threaded connection between the threaded rod and the rotating seat, each clamping plate can be driven to contract inward, so that the clamping plates are clamped with the periphery of the electrical components, achieving the effect of positioning the electrical components.

[0012] For the EMC shielding device, through the threaded connection between the positioning screw rod and the threaded plate, the position of the arc-shaped limiting block can be adjusted. Through the clamping effect between the arc-shaped limiting block and the annular limiting groove, the connecting seat can be positioned. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the external split structure of the shielding plate and the shielding cover of the utility model;

[0014] Figure 2 is a schematic diagram of the external split structure of the clamping plate and the movable plate of the utility model;

[0015] Figure 3 is a schematic diagram of the internal structure of the shielding plate and the connecting seat of the utility model;

[0016] Figure 4 is a schematic diagram of the internal split structure of the shielding plate and the connecting seat of the utility model;

[0017] Figure 5 is a schematic diagram of the internal split structure of the annular limiting groove and the arc-shaped limiting block of the utility model.

[0018] In the figure:

[0019] 1. Shielding plate; 11. Shielding cover; 12. Supporting seat; 13. Extension plate; 14. Clamping plate; 15. Limiting insertion cavity; 16. Movable plate; 17. Limiting sliding cavity;

[0020] 2. Connecting seat; 21. Rotating seat; 22. First limiting seat; 23. Second limiting seat; 24. Movable ring; 25. Threaded rod; 26. Tooth ring;

[0021] 3. Ring-shaped limiting groove; 31. Arc-shaped limiting block; 32. Limiting jack; 33. Positioning screw; 34. Limiting rotation cavity; 35. Threaded plate. Specific implementation manner

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

[0023] Please refer to Figures 1-5 , the present invention provides a technical solution: an EMC shielding device, including a shielding plate 1 and a shielding cover 11. The shielding cover 11 is inserted and installed at the upper end of the shielding plate 1. A support seat 12 is fixedly installed in the middle of the upper end of the shielding plate 1. A plurality of clamping plates 14 are arranged around the support seat 12. The lower ends of the clamping plates 14 are attached to the upper end of the shielding plate 1. A plurality of extension plates 13 are fixedly installed around the support seat 12. The plurality of clamping plates 14 and the extension plates 13 are distributed in a staggered manner. A movable plate 16 inserted into the two clamping plates 14 on both sides is slidably installed in each extension plate 13. Rotating seats 21 are respectively rotatably installed at the lower ends of two clamping plates 14 arranged diagonally. A connecting seat 2 is rotatably installed around the support seat 12. Threaded rods 25 respectively threadedly connected to the two rotating seats 21 are rotatably installed on both sides of the connecting seat 2. A toothed ring 26 meshingly connected to the two threaded rods 25 on both sides is rotatably installed around the support seat 12.

[0024] Working principle: When in use, according to the aspect ratio of the length and width of the electrical component, on the upper end of the shielding plate 1, the connecting seat 2 is rotated to drive the rotating seat 21 and the clamping plate 14 above it to rotate around the support seat 12. Since the two clamping plates 14 are arranged diagonally, the two moving clamping plates 14 can adjust the aspect ratio of the length and width of the interval formed by the four clamping plates 14, so that the formed interval matches the shape of the electrical component;

[0025] Then, on the upper end of the connecting seat 2, the threaded rod 25 is rotated. Through the meshing effect between the toothed ring 26 and the two threaded rods 25, the other threaded rod 25 can be driven to rotate along with it. Also, since the rotating seat 21 is in contact with the connecting seat 2, the rotating threaded rod 25 can drive the two clamping plates 14 arranged diagonally to contract inward through its threaded connection with the connecting seat 2. The two moving clamping plates 14 drive the other two clamping plates 14 to contract inward through the insertion connection between the clamping plate 14 and the movable plate 16 and the sliding connection between the movable plate 16 and the extension plate 13, so that the four clamping plates 14 are clamped to the periphery of the electrical component, achieving the effect of positioning the electrical component;

[0026] Finally, cover the shielding cover 11 on the upper end of the shielding plate 1. Through the shielding plate 1 and the shielding cover 11, external electromagnetic signals can be shielded.

[0027] As a further description of the above technical solution: a limiting sliding cavity 17 is opened in the extension plate 13, the movable plate 16 is slidably installed in the limiting sliding cavity 17, limiting insertion cavities 15 are opened on both sides of the clamping plate 14, and the outer end of the movable plate 16 is inserted into the limiting insertion cavity 15.

[0028] Specifically, through the sliding connection between the limiting sliding cavity 17 and the movable plate 16, the movement direction of the movable plate 16 can be restricted at the extension plate 13. And through the insertion connection between the movable plate 16 and the limiting insertion cavity 15, when the two diagonally arranged clamping plates 14 move, they can drive the other two clamping plates 14 to move along with them.

[0029] As a further description of the above technical solution: a movable ring 24 is fixedly installed in the middle of the connecting seat 2, the movable ring 24 is rotatably installed around the outer periphery of the support seat 12, a toothed ring 26 is arranged on the upper side of the movable ring 24, a first limiting seat 22 and a second limiting seat 23 are respectively fixedly installed on the inner and outer sides of the connecting seat 2, a threaded rod 25 is rotatably installed between the first limiting seat 22 and the second limiting seat 23, a circular limiting groove 3 is opened at the upper end of the shielding plate 1, an arc-shaped limiting block 31 is arranged on the lower side of the connecting seat 2, the arc-shaped limiting block 31 is slidably installed in the circular limiting groove 3, a limiting rotating cavity 34 is opened on the outer side of the second limiting seat 23, a limiting insertion hole 32 is opened at the lower side of the limiting rotating cavity 34, a positioning screw 33 inserted into the limiting insertion hole 32 is fixedly installed at the upper end of the arc-shaped limiting block 31, and a threaded plate 35 threadedly connected to the positioning screw 33 is rotatably installed in the limiting rotating cavity 34.

[0030] Specifically, setting the first limiting seat 22 and the second limiting seat 23 can restrict the movement direction of the threaded rod 25;

[0031] Setting the movable ring 24 can rotate the connecting seat 2 around the outer periphery of the support seat 12. And the rotating connecting seat 2 can drive the arc-shaped limiting block 31 to rotate in the circular limiting groove 3. When the connecting seat 2 needs to be positioned, rotate the threaded plate 35 in the limiting rotating cavity 34. Through its threaded connection with the positioning screw 33, drive the positioning screw 33 and the arc-shaped limiting block 31 at its lower end to move upward, so that the arc-shaped limiting block 31 is clamped with the circular limiting groove 3, thereby achieving the effect of positioning the connecting seat 2.

[0032] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An EMC shielding device, comprising a shielding plate (1) and a shielding cover (11), characterized in that: The shielding cover (11) is plugged and installed on the upper end of the shielding plate (1); a support seat (12) is fixedly installed in the middle of the upper end of the shielding plate (1); a plurality of clamping plates (14) are arranged on the periphery of the support seat (12); the lower end of the clamping plate (14) is in contact with the upper end of the shielding plate (1); a plurality of extension plates (13) are fixedly installed on the periphery of the support seat (12); the plurality of clamping plates (14) and the extension plates (13) are staggered with each other; a movable plate (16) plugged with the clamping plates (14) on both sides is slidably installed in each extension plate (13); a rotating seat (21) is rotatably installed at the lower ends of the two clamping plates (14) arranged diagonally, respectively; a connecting seat (2) is rotatably installed on the periphery of the support seat (12); threaded rods (25) threadedly connected to the two rotating seats (21) are rotatably installed on both sides of the connecting seat (2); and a gear ring (26) meshingly connected to the threaded rods (25) on both sides is rotatably installed on the periphery of the support seat (12).

2. An EMC shielding device according to claim 1, characterized in that: The extension plate (13) has a limited sliding cavity (17) in it, the movable plate (16) is slidably mounted in the limited sliding cavity (17), limited insertion cavities (15) are provided on both sides of the clamping plate (14), and the outer ends of the movable plate (16) are plugged into the limited insertion cavities (15).

3. An EMC shielding device according to claim 1, characterized in that: A movable ring (24) is fixedly mounted in the middle of the connecting seat (2), the movable ring (24) is rotatably mounted on the periphery of the supporting seat (12), and the gear ring (26) is arranged on the upper side of the movable ring (24).

4. An EMC shielding device according to claim 1, characterized in that: A first limiting seat (22) and a second limiting seat (23) are respectively fixedly mounted on the inner and outer sides of the connecting seat (2), and the threaded rod (25) is rotatably mounted between the first limiting seat (22) and the second limiting seat (23).

5. An EMC shielding device according to claim 4, characterized in that: An annular limiting groove (3) is provided at the upper end of the shielding plate (1), an arc-shaped limiting block (31) is provided at the lower side of the connecting seat (2), and the arc-shaped limiting block (31) is slidably installed in the annular limiting groove (3).

6. An EMC shielding device according to claim 5, characterized in that: A limited rotation cavity (34) is provided on the outer side of the second limit seat (23), a limited insertion hole (32) is provided on the lower side of the limit rotation cavity (34), a positioning screw (33) plugged into the limit insertion hole (32) is fixedly installed on the upper end of the arc-shaped limit block (31), and a threaded plate (35) threadedly connected to the positioning screw (33) is rotatably installed in the limit rotation cavity (34).

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