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CN-224218726-U - Multilayer nested high-frequency electromagnetic shielding device

CN224218726UCN 224218726 UCN224218726 UCN 224218726UCN-224218726-U

Abstract

The utility model belongs to the technical field of electromagnetic shield, especially, relate to a multilayer nested formula high frequency electromagnetic shield device, it is extremely limited to the absorption ability of current device individual layer box to high frequency electromagnetic wave, a large amount of high frequency electromagnetic interference is only simply reflected, and the electromagnetic wave after the reflection is at the inside and outside repeated refraction of box, form complicated standing wave phenomenon, not only unable electromagnetic interference intensity in the effective reduction box, the problem of the complexity of electromagnetic environment has instead been aggravated, the following scheme is proposed, a multilayer nested formula high frequency electromagnetic shield device, including the shielding base, the surface of shielding base is nested in proper order from inside to outside is provided with inlayer shield, middle level shield and outer shield; the beneficial effects of the utility model are that: the design of nesting sequentially from inside to outside enables the shielding bodies of all layers to work cooperatively, weakens high-frequency electromagnetic interference layer by layer, and can more comprehensively and efficiently cope with complex high-frequency electromagnetic environments and obviously improve the shielding effect compared with a single-layer shielding structure.

Inventors

  • CAI WEIXIN
  • ZHANG KAI
  • GAO YANG
  • JIANG YANBO
  • Fan Yueru
  • QI YANG

Assignees

  • 常州市恒力电磁屏蔽设备有限公司

Dates

Publication Date
20260508
Application Date
20250328

Claims (6)

  1. 1. The multilayer nested high-frequency electromagnetic shielding device is characterized by comprising a shielding base (1), wherein an inner shielding body (2), a middle shielding body (3) and an outer shielding body (4) are sequentially nested from inside to outside on the surface of the shielding base (1).
  2. 2. The multilayer nested high-frequency electromagnetic shielding device according to claim 1, wherein the inner shielding body (2) is made of a metal material with high magnetic permeability, and a plurality of micropores are uniformly distributed on the surface of the inner shielding body (2).
  3. 3. The multilayer nested high-frequency electromagnetic shielding device according to claim 1, wherein the middle layer shielding body (3) is of a metal wire mesh structure, the metal wire mesh is made of a copper alloy material, the inner layer shielding body (2) is connected with the middle layer shielding body (3) through metal bolts (5), and a gap exists between the inner layer shielding body (2) and the middle layer shielding body (3).
  4. 4. The multilayer nested high-frequency electromagnetic shielding device according to claim 1, wherein the outer shielding body (4) is made of a metal plate made of aluminum alloy, and the outer shielding body (4) is connected with the middle shielding body (3) through welding.
  5. 5. A multi-layer nested high-frequency electromagnetic shielding device according to claim 3, wherein the contact between the inner layer shielding body (2), the middle layer shielding body (3) and the outer layer shielding body (4) and the shielding base (1) is provided with a conductive shielding pad (6), and the conductive shielding pad (6) is arranged on the surface of the shielding base (1).
  6. 6. The multilayer nested high-frequency electromagnetic shielding device according to claim 1, wherein the outer shielding body (4) is rotationally connected to the surface of the shielding base (1) through a hinge, a pneumatic spring (8) is hinged to the surface of the outer shielding body (4), the other end of the pneumatic spring (8) is hinged to the surface of the shielding base (1), a fixing plate (12) is arranged on the surface of the shielding base (1), a locking screw (13) is connected to the surface of the fixing plate (12) in a threaded manner, a wedge block (14) is rotationally connected to one end of the locking screw (13), a fixing block (10) is arranged on one side of the outer shielding body (4), a wedge groove (11) is formed in the surface of the fixing block (10), a T-shaped guide rod (15) is connected to the surface of the fixing plate (12) in a sliding manner, one end of the T-shaped guide rod (15) is connected with the wedge block (14), and a handle (9) is fixedly arranged on one side surface of the outer shielding body (4).

Description

Multilayer nested high-frequency electromagnetic shielding device Technical Field The utility model relates to an electromagnetic shielding device, in particular to a multilayer nested high-frequency electromagnetic shielding device, and belongs to the technical field of electromagnetic shielding. Background With the rapid development of electronic technology, various electronic devices can generate high-frequency electromagnetic radiation during working, and the radiation can not only interfere the normal operation of other surrounding electronic devices, but also can cause potential harm to human health, and meanwhile, in some occasions with extremely high requirements on electromagnetic environment, such as medical equipment rooms, communication base stations, electronic laboratories and the like, effective electromagnetic shielding measures are required to prevent external high-frequency electromagnetic interference from entering, so that the accurate operation of the devices is affected; in the prior art, the electromagnetic shielding box disclosed by the publication No. CN209017394U can realize semi-automatic operation of a box cover, has the advantages of time and labor saving, improvement of working efficiency, simple structure and low cost, and the technical scheme has the following defects that the electromagnetic shielding box adopts a single-layer structure, the absorption capacity of the single-layer box to high-frequency electromagnetic waves is extremely limited, a large amount of high-frequency electromagnetic interference is simply reflected, the reflected electromagnetic waves are repeatedly refracted in and out of the box to form a complex standing wave phenomenon, the electromagnetic interference intensity in the box cannot be effectively reduced, and the complexity of an electromagnetic environment is aggravated. Disclosure of utility model The utility model aims to solve the problems that the single-layer box body of the device has extremely limited absorption capacity on high-frequency electromagnetic waves, a large amount of high-frequency electromagnetic interference is simply reflected, the reflected electromagnetic waves are repeatedly refracted outside and inside the box body to form complex standing wave phenomena, the electromagnetic interference intensity inside the box body cannot be effectively reduced, and the complexity of an electromagnetic environment is aggravated. The utility model realizes the aim through the following technical scheme that the multi-layer nested high-frequency electromagnetic shielding device comprises a shielding base, wherein an inner shielding body, a middle shielding body and an outer shielding body are sequentially nested from inside to outside on the surface of the shielding base. As a still further proposal of the utility model, the inner shielding body is made of metal material with high magnetic permeability, and the surface of the inner shielding body is provided with a plurality of micropores which are uniformly distributed. As a still further proposal of the utility model, the middle layer shield is of a metal wire mesh structure, the metal wire mesh is made of copper alloy material, the inner layer shield and the middle layer shield are connected through metal bolts, and a gap exists between the inner layer shield and the middle layer shield. As a still further proposal of the utility model, the outer shielding body is made of metal plates made of aluminum alloy material, and the outer shielding body is connected with the middle shielding body by welding. As a still further proposal of the utility model, the contact positions among the inner layer shielding body, the middle layer shielding body, the outer layer shielding body and the shielding base are provided with conductive shielding pads which are arranged on the surface of the shielding base. As a still further scheme of the utility model, an outer shielding body is rotationally connected to the surface of a shielding base through a hinge, a pneumatic spring is hinged to the surface of the outer shielding body, the other end of the pneumatic spring is hinged to the surface of the shielding base, a fixing plate is arranged on the surface of the shielding base, a locking screw is connected to the surface of the fixing plate in a threaded manner, a wedge block is rotationally connected to one end of the locking screw, a fixing block is arranged on one side of the outer shielding body, a wedge groove is formed in the surface of the fixing block, a T-shaped guide rod is connected to the surface of the fixing plate in a sliding manner, one end of the T-shaped guide rod is connected with the wedge block, and a handle is fixedly arranged on one side surface of the outer shielding body. The beneficial effects of the utility model are as follows: According to the utility model, through the matched use of the structures such as the shielding base, the inner shielding body, the middle shielding