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CN-122002775-A - Anti-electromagnetic interference filtering device

CN122002775ACN 122002775 ACN122002775 ACN 122002775ACN-122002775-A

Abstract

The invention discloses an anti-electromagnetic interference filter device, and relates to the technical field of filter devices. The filtering device comprises a filtering device body, wherein the filtering device body comprises a shell, a first signal bin, a power supply bin and a second signal bin are separated in the shell, a top cover is fixedly connected to the top of the shell, a first signal protection plate and a second signal protection plate are respectively arranged in the first signal bin and the second signal bin, a power supply protection plate is arranged in the power supply bin, a grounding plate is arranged at the top of the top cover, three circular connectors are arranged at the bottom of the shell, two fixing seats are fixedly connected to the top of the top cover, and different types of signals transmitted in the first signal bin, the power supply bin and the second signal bin adopt different filtering modes. The invention effectively avoids electromagnetic coupling interference between the power supply loop and the signal loop by adopting a partition shielding design, and solves the electromagnetic compatibility problem in the signal transmission process from the frequency domain by adopting different filtering modes for different transmission signals in each bin body.

Inventors

  • REN TIANXIANG
  • CHEN JIAN

Assignees

  • 重庆大及电子科技有限公司

Dates

Publication Date
20260508
Application Date
20260313

Claims (7)

  1. 1. An anti-electromagnetic interference filter device is characterized by comprising, The filtering device comprises a filtering device main body (100), and comprises a shell (101), wherein a first signal bin (101 a), a power supply bin (101 b) and a second signal bin (101 c) are separated in the shell (101), and a top cover (102) is fixedly connected to the top of the shell (101); The inside of the first signal bin (101 a) and the inside of the second signal bin (101 c) are respectively provided with a first signal protection plate (105) and a second signal protection plate (107), the inside of the power bin (101 b) is provided with a power protection plate (106), the top of the top cover (102) is provided with a grounding plate (104), and the bottom of the shell (101) is provided with three circular connectors (109); the top of the top cover (102) is fixedly connected with two symmetrically distributed fixing seats (108) for fixing the client function board.
  2. 2. The anti-electromagnetic interference filtering device according to claim 1, wherein the first signal protection board (105), the power protection board (106) and the second signal protection board (107) all realize signal transmission through a cross pin or a printed board connector, and finally are assembled to a top circuit board through transfer.
  3. 3. The anti-electromagnetic interference filtering device according to claim 1, wherein the front surface of the housing (101) is provided with an access hole, and the front surface of the housing (101) is fixedly connected with a front panel (103) for blocking the access hole.
  4. 4. An anti-electromagnetic interference filter device according to claim 1, characterized in that three circular connectors (109) are mounted inside the first signal bin (101 a), the power bin (101 b) and the second signal bin (101 c), respectively.
  5. 5. The anti-electromagnetic interference filter device according to claim 1, wherein the inner walls of the first signal bin (101 a), the power bin (101 b) and the second signal bin (101 c) are coated with metal shielding films.
  6. 6. The anti-electromagnetic interference filter device according to claim 1, wherein an outer cover shell (200) is fixedly sleeved on the outer part of the filter device main body (100), and a detachable cover plate (201) is fixedly connected to the top of the outer cover shell (200).
  7. 7. An anti-electromagnetic interference filtering device according to claim 1, wherein different types of signals transmitted in the first signal bin (101 a), the power supply bin (101 b) and the second signal bin (101 c) adopt different filtering modes.

Description

Anti-electromagnetic interference filtering device Technical Field The invention belongs to the technical field of filter devices, and particularly relates to an anti-electromagnetic interference filter device. Background The filtering device is mainly used for screening and purifying electronic signals, ensures the accuracy and stability of signal transmission of electronic equipment by allowing signals in a specific frequency range to normally pass through, attenuate or block irrelevant frequency signals, and is widely applied to the fields of communication, aerospace, industrial control, medical electronics and the like. Along with the rapid development of electronic technology to high frequency, integration and miniaturization, the internal element layout of electronic equipment is more and more dense, the distance between a power supply loop and a signal loop is continuously shortened, the problem of electromagnetic interference is increasingly prominent, the filtering device in the prior art mostly adopts a single cavity design, the power supply signal and various functional signals are not effectively partitioned and isolated, so that the electromagnetic interference generated by the power supply loop is easy to invade the signal loop through a space coupling or conducting path to cause the problems of signal distortion, transmission error codes and the like, meanwhile, the existing filtering device mostly adopts a uniform filtering mode to process signals of different types and different frequencies, the frequency characteristics and the transmission requirements of various signals cannot be accurately filtered, the filtering effect is limited, the use requirements of high-precision and high-stability electronic equipment are difficult to meet, in addition, part of the filtering device is fixed in structure, the overhaul and the maintenance are inconvenient, and the client function boards of different specifications are difficult to adapt. Therefore, we provide a filtering device for resisting electromagnetic interference to solve the above problems. Disclosure of Invention The invention aims to provide an anti-electromagnetic interference filter device, which is characterized in that the interior of a shell is divided into a first signal bin, a power supply bin and a second signal bin by adopting a partition shielding design, and the filter device is matched with protection plates corresponding to all bin bodies and different filtering modes, so that the problems that the existing filter device is serious in electromagnetic coupling interference, single in filtering mode, inconvenient to overhaul and maintain and poor in universality due to the fact that effective partition isolation is not available are solved. In order to solve the technical problems, the invention is realized by the following technical scheme: The invention relates to an anti-electromagnetic interference filtering device, which comprises a filtering device main body, wherein the filtering device main body comprises a shell, a first signal bin, a power supply bin and a second signal bin are separated in the shell, and a top cover is fixedly connected to the top of the shell; The first signal bin and the second signal bin are internally provided with a first signal protection plate and a second signal protection plate respectively, the power supply bin is internally provided with a power supply protection plate, the top of the top cover is provided with a grounding plate, and the bottom of the shell is provided with three circular connectors; The top of the top cover is fixedly connected with two symmetrically distributed fixing seats for fixing the client function board. The invention further provides that the first signal protection plate, the power supply protection plate and the second signal protection plate realize signal transmission through the cross pin or the printed board connector and are finally collected to the top layer circuit board through switching. The invention is further characterized in that the front surface of the shell is provided with an access hole, and the front surface of the shell is fixedly connected with a front panel for blocking the access hole. The invention is further arranged that the three circular connectors are respectively arranged in the first signal bin, the power supply bin and the second signal bin. The invention further provides that the inner walls of the first signal bin, the power bin and the second signal bin are coated with metal shielding films. The invention is further characterized in that an outer cover shell is fixedly sleeved outside the filter device main body, and a detachable cover plate is fixedly connected to the top of the outer cover shell. The invention further provides that different types of signals transmitted in the first signal bin, the power bin and the second signal bin adopt different filtering modes. The invention has the following beneficial effects: 1. acc