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CN-224232478-U - Precise inductance filter

CN224232478UCN 224232478 UCN224232478 UCN 224232478UCN-224232478-U

Abstract

The utility model provides a precise inductance filter applied to the field of filters, which comprises a base and a filter assembly arranged on the base, wherein the filter assembly comprises a plurality of groups of coaxial magnetic tubes which are coaxially sleeved, a spiral coil winding is arranged between every two adjacent coaxial magnetic tubes, two ends of the filter assembly are detachably connected with end covers, one end cover is remotely fixed with an outer shielding box, an L-shaped cover plate matched with the outer shielding box is arranged in the base, and the precise inductance filter can filter current more efficiently by utilizing the magnetic field coupling and inductance characteristics through the plurality of groups of coaxial magnetic tubes which are coaxially sleeved and the spiral coil winding which is wound between the adjacent coaxial magnetic tubes, thereby improving the filtering precision and meeting the requirement of electronic equipment on high-precision filtering. The outer shielding box and the L-shaped cover plate are made of electromagnetic shielding materials, and a good electromagnetic shielding space is formed through a reasonable assembly structure, so that the external electromagnetic interference can be effectively blocked, the anti-interference capability of the filter is improved, and the stable operation of the filter is ensured.

Inventors

  • CHEN LUNSEN

Assignees

  • 深圳市阿赛姆电子有限公司

Dates

Publication Date
20260512
Application Date
20250403

Claims (5)

  1. 1. The precise inductance filter comprises a base (2) and a filtering component (7) arranged on the base (2), and is characterized in that the filtering component (7) comprises a plurality of groups of coaxial magnetic tubes (71) which are coaxially sleeved, the distances between adjacent coaxial magnetic tubes (71) are equal, and spiral coil windings (72) are wound between the adjacent coaxial magnetic tubes (71); the filter assembly is characterized in that end covers (6) are detachably connected to two ends of the filter assembly (7), a first limiting seat (4) and a second limiting seat (5) which are matched with the end covers (6) are respectively fixed to two sides of the top of the base (2), a limiting groove (41) is formed in the first limiting seat (4), a conductive groove (42) is formed in the limiting groove (41), a through groove (51) is formed in the second limiting seat (5), conductive protruding points (61) matched with the conductive groove (42) are formed in one side, far away from the filter assembly (7), of the end covers (6), an outer shielding box (1) is fixed to one side, far away from the filter assembly (7), of the end covers (6), and an L-shaped cover plate (3) matched with the outer shielding box (1) is arranged in the base (2); The bottom of the base (2) is also fixed with a pin (21), and the spiral coil winding (72) is electrically connected with the pin (21) through the cooperation of the limit groove (41) and the conductive convex point (61).
  2. 2. The precise inductive filter according to claim 1, wherein the outer shielding box (1) and the L-shaped cover plate (3) are made of electromagnetic shielding materials, the L-shaped cover plate (3) is fixed at the top of the base (2), the first limiting seat (4) and the second limiting seat (5) are both fixed at the top of the L-shaped cover plate (3), inserting grooves (22) matched with the outer shielding box (1) are formed in two sides of the L-shaped cover plate (3) of the base (2), the bottom side of the L-shaped cover plate (3) is abutted against the bottom of the outer shielding box (1) through the inserting grooves (22), and a buckling structure (31) is arranged on one side, abutted against the L-shaped cover plate (3), of the outer shielding box (1).
  3. 3. The precise inductive filter according to claim 1, wherein the outer wall of the outer shielding box (1) is provided with a plurality of heat conducting insertion plates (11), and the other ends of the heat conducting insertion plates (11) extend to one side of the inner wall of the outer shielding box (1).
  4. 4. The precise inductive filter according to claim 1, wherein the limiting groove (41) and the penetrating groove (51) are matched with the outer contour of the end cover (6), and the outer contour of the end cover (6) is arranged asymmetrically from top to bottom.
  5. 5. A precision inductive filter according to claim 1, characterized in that the opposite sides of both sets of end caps (6) are provided with concentric fitting grooves (62), said concentric fitting grooves (62) being fitted with the ends of coaxial magnetic tubes (71).

Description

Precise inductance filter Technical Field The application relates to the field of filters, in particular to a precise inductance filter. Background In the operation process of the electronic equipment, the inductance filter plays a vital role, and has the main functions of filtering the current, removing clutter and interference signals in the current and ensuring the stable operation of the electronic equipment. However, with the rapid development of electronic technology, higher requirements are put on the accuracy and performance of the inductive filter. The traditional inductance filter has a plurality of defects in structural design, such as unsatisfactory electromagnetic shielding effect, easiness in being influenced by external electromagnetic interference, further influence on filtering precision, poor heat dissipation performance, heat accumulation during long-time working, performance reduction, inconvenience in installation and maintenance processes and inconvenience in improving production and maintenance efficiency. Therefore, it is urgent to develop a new type of precise inductive filter to solve the above problems. Disclosure of utility model Compared with the prior art, the precise inductance filter provided by the application comprises a base and a filter assembly arranged on the base, wherein the filter assembly comprises a plurality of groups of coaxial magnetic tubes which are coaxially sleeved, the adjacent coaxial magnetic tubes have equal spacing, and spiral coil windings are wound between the adjacent coaxial magnetic tubes; The two ends of the filtering component are detachably connected with end covers, a first limit seat and a second limit seat which are matched with the end covers are respectively fixed on two sides of the top of the base, a limit groove is formed in the first limit seat, a conductive groove is formed in the limit groove, a through groove is formed in the second limit seat, a conductive salient point which is matched with the conductive groove is formed on one side, far away from the filtering component, of the end cover, an outer shielding box is fixed on one side, far away from the filtering component, of the end cover, and an L-shaped cover plate which is matched with the outer shielding box is arranged in the base; The bottom of base still is fixed with the pin, spiral coil winding passes through spacing groove and electrically conductive bump's cooperation and pin electric connection. Further, outer shielding box is electromagnetic shielding material with L type apron, L type apron is fixed at the top of base, first spacing seat and the top at L type apron are all fixed to the spacing seat of second, the base all is equipped with the jack groove with outer shielding box assorted in the both sides of L type apron, the bottom avris of L type apron is inconsistent with the bottom of outer shielding box through the jack groove, one side that outer shielding box is inconsistent with L type apron is equipped with buckle structure. Further, the outer wall of the outer shielding box is provided with a plurality of heat conducting plugboards, and the other ends of the heat conducting plugboards extend to one side of the inner wall of the outer shielding box. Furthermore, the limiting groove and the penetrating groove are matched with the outer contour of the end cover, and the outer contour of the end cover is arranged asymmetrically up and down. Furthermore, a plurality of concentric assembly grooves are formed in one side, opposite to the end covers, of the two groups of end covers, and the concentric assembly grooves are matched with the end parts of the coaxial magnetic tubes. Compared with the prior art, the application has the advantages that: According to the application, through a plurality of groups of coaxial magnetic tubes which are coaxially sleeved and spiral coil windings which are wound between adjacent coaxial magnetic tubes, the current can be filtered more efficiently by utilizing the magnetic field coupling and inductance characteristics, the filtering precision is improved, and the requirement of electronic equipment on high-precision filtering is met. The outer shielding box and the L-shaped cover plate are made of electromagnetic shielding materials, and a good electromagnetic shielding space is formed through a reasonable assembly structure, so that the external electromagnetic interference can be effectively blocked, the anti-interference capability of the filter is improved, and the stable operation of the filter is ensured. Drawings FIG. 1 is a schematic diagram of the front structure of the present application; FIG. 2 is a schematic view of the bottom structure of the present application; FIG. 3 is a schematic diagram of an explosive structure according to the present application; FIG. 4 is a schematic view of an exploded view of a base and its components according to the present application; FIG. 5 is a schematic view of an exploded view o