Precise inductance filter

Abstract

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

Description

TECHNICAL FIELD

[0001] The application relates to the field of filters, in particular to a precision inductance filter. BACKGROUND

[0002] In the running process of electronic equipment, the inductance filter plays a crucial role, and its main function is to filter the current, remove the noise and interference signals in the current, and ensure the stable operation of the electronic equipment. However, with the rapid development of electronic technology, higher requirements are put forward for the precision and performance of the inductance filter. The traditional inductance filter has many defects in the structure design, for example, the electromagnetic shielding effect is not ideal, it is easy to be affected by external electromagnetic interference, and then the filtering precision is affected; the heat dissipation performance is poor, the heat accumulates for a long time, and the performance is reduced; and in the installation and maintenance process, it is not convenient, which is not conducive to improving the production and maintenance efficiency. Therefore, it is urgent to develop a new type of precision inductance filter to solve the above problems. CONTENT OF THE INVENTION

[0003] The application aims to solve the technical problems of poor filtering precision and low disassembly and maintenance convenience of the existing filter, and provides a precision inductance filter compared with the prior art, which comprises a base and a filter assembly arranged on the base, the filter assembly comprises a plurality of coaxial magnetic tubes coaxially sleeved, the spacing between adjacent coaxial magnetic tubes is equal, and a spiral coil winding is wound between adjacent coaxial magnetic tubes.

[0004] Both ends of the filter assembly are detachably connected with end covers, the top of the base is fixed with a first limiting seat and a second limiting seat matched with the end covers on both sides, a limiting groove is arranged on the first limiting seat, a conductive recess is arranged in the limiting groove, a through groove is arranged on the second limiting seat, a conductive convex point matched with the conductive recess is arranged on one side of the end cover away from the filter assembly, and an outer shielding box is fixed on the other side of the end cover away from the filter assembly, and an L-shaped cover plate matched with the outer shielding box is arranged in the base.

[0005] The bottom of the base is further fixed with a pin, and the spiral coil winding is electrically connected with the pin through the cooperation of the limiting groove and the conductive convex point.

[0006] Further, the outer shielding box and the L-shaped cover plate are both electromagnetic shielding materials, the L-shaped cover plate is fixed on the top of the base, the first limiting seat and the second limiting seat are both fixed on the top of the L-shaped cover plate, the base is provided with a plug-in groove matched with the outer shielding box on both sides of the L-shaped cover plate, the bottom side of the L-shaped cover plate is in abutment with the bottom of the outer shielding box through the plug-in groove, and the side in abutment between the outer shielding box and the L-shaped cover plate is provided with a buckle structure.

[0007] Further, the outer wall of the outer shielding box is provided with a plurality of heat-conducting inserts, and the other end of the heat-conducting inserts extends to one side of the inner wall of the outer shielding box.

[0008] Further, the limiting groove and the through groove are matched with the outer contour of the end cover, and the outer contour of the end cover is asymmetrically arranged up and down.

[0009] Further, the opposite side of the two groups of end covers is provided with a plurality of concentric assembly grooves, and the concentric assembly grooves are matched with the end part of the coaxial magnetic tube.

[0010] Compared with the prior art, the application has the following advantages:

[0011] The application can more efficiently filter current, improve filtering precision, and meet the demand of electronic equipment for high-precision filtering by using magnetic field coupling and inductance characteristics through a plurality of coaxial magnetic tubes coaxially sleeved and a spiral coil winding wound between adjacent coaxial magnetic tubes. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front structure schematic diagram of the application;

[0013] Figure 2 It is a bottom structure schematic diagram of the application;

[0014] Figure 3 It is an explosion structure schematic diagram of the application;

[0015] Figure 4 It is an explosion structure schematic diagram of the base and its components proposed in the application;

[0016] Figure 5 It is an explosion structure schematic diagram of the outer shielding box and its components proposed in the application;

[0017] Figure 6 It is an internal structure schematic diagram of the filter assembly proposed in the application;

[0018] Figure 7 It is a cross-sectional structure schematic diagram of the application.

[0019] Explanation of figure marks:

[0020] 1, outer shielding box; 11, heat-conducting plugboard; 2, base; 21, pin; 22, plug-in slot; 3, L-shaped cover plate; 31, buckle structure; 4, first limiting seat; 41, limiting groove; 42, conductive groove; 5, second limiting seat; 51, through groove; 6, end cover; 61, conductive bump; 62, concentric assembly groove; 7, filter assembly; 71, coaxial magnetic tube; 72, spiral coil winding. DETAILED DESCRIPTION

[0021] The embodiments will be described clearly and completely in conjunction with the drawings of the specification, and all other embodiments obtained by those skilled in the art on the basis of the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0022] Embodiment:

[0023] The utility model provides a kind of precision inductance filter, please refer to Figure 1 - Figure 7 Mainly by base 2, filter assembly 7 being arranged on base 2, end cover 6, first limiting seat 4, second limiting seat 5, outer shielding box 1, L-shaped cover plate 3 and pin 21 are constituted.

[0024] Filter assembly 7 includes multiple groups of coaxial magnetic tubes 71 that are coaxially connected, adjacent coaxial magnetic tubes 71 maintain equal spacing, and spiral coil winding 72 is wound between adjacent coaxial magnetic tubes 71. This structure design utilizes the magnetic field coupling effect of coaxial magnetic tube 71 and the inductance characteristics of spiral coil winding 72, which can efficiently filter current and significantly improve filtering accuracy.

[0025] Both ends of filter assembly 7 are detachably connected to end cover 6. Base 2 has first limiting seat 4 and second limiting seat 5 fixed on both sides of the top, limiting groove 41 is provided on first limiting seat 4, conductive groove 42 is provided in limiting groove 41, and through groove 51 is provided on second limiting seat 5. One side of end cover 6 away from filter assembly 7 is provided with conductive bump 61 matched with conductive groove 42, and the other side of end cover 6 away from filter assembly 7 is fixed with outer shielding box 1. Pin 21 is fixed on the bottom of base 2, and spiral coil winding 72 is electrically connected to pin 21 by the cooperation of limiting groove 41 and conductive bump 61. This connection method not only facilitates the installation and disassembly of filter assembly 7, but also facilitates the maintenance of the later period, and can ensure the stability and conductivity of circuit connection.

[0026] Both the outer shielding box 1 and the L-shaped cover plate 3 are made of electromagnetic shielding material. The L-shaped cover plate 3 is fixed to the top of the base 2, and the first limiting seat 4 and the second limiting seat 5 are both fixed to the top of the L-shaped cover plate 3. The base 2 has insertion slots 22 on both sides of the L-shaped cover plate 3 that are adapted to the outer shielding box 1. The bottom edge of the L-shaped cover plate 3 abuts against the bottom of the outer shielding box 1 through the insertion slots 22, and a snap-fit ​​structure 31 is provided on the side of the outer shielding box 1 that abuts against the L-shaped cover plate 3. This shielding and assembly structure can effectively enhance the electromagnetic shielding performance of the filter, reduce the impact of external electromagnetic interference on the filtering effect, and also facilitate the assembly between the components.

[0027] Several heat-conducting plates 11 are provided on the outer wall of the outer shielding box 1, with the other end of each heat-conducting plate 11 extending to one side of the inner wall of the outer shielding box 1. During the operation of the filter, the heat generated can be quickly transferred to the outer wall of the outer shielding box 1 through the heat-conducting plates 11, and then dissipated into the surrounding environment, effectively improving the heat dissipation performance of the filter and ensuring its stability during long-term operation.

[0028] Both the limiting groove 41 and the through groove 51 match the outer contour of the end cap 6, and the outer contour of the end cap 6 is asymmetrically arranged vertically. This design prevents the end cap 6 from being installed backwards during installation, improving the accuracy of installation. Several concentric mounting grooves 62 are provided on opposite sides of both sets of end caps 6. The concentric mounting grooves 62 are adapted to the ends of the coaxial magnetic tube 71, and can position and fix the coaxial magnetic tube 71 when the end cap 6 is installed, ensuring the structural stability of the filter assembly 7.

[0029] When this application is in operation, when current enters the filter through pin 21, the current first flows through the helical coil winding 72, which is electrically connected to pin 21. Under the magnetic field coupling effect of the adjacent coaxial magnet 71 wound around the helical coil winding 72, noise and interference signals in the current are filtered out.

[0030] After filtering, the current passes through the conductive bump 61 and conductive groove 42 connected to the spiral coil winding 72, and is then output from the corresponding pin 21, completing the filtering process.

[0031] During filter operation, the generated heat is conducted to the outer wall through the heat-conducting plate 11 on one side of the inner wall of the outer shielding box 1, and dissipated into the surrounding environment, maintaining the normal operating temperature of the filter.

[0032] This application utilizes multiple sets of coaxially connected coaxial magnetic tubes 71 and helical coil windings 72 wound between adjacent coaxial magnetic tubes 71 to filter current more efficiently by taking advantage of magnetic field coupling and inductance characteristics, thereby improving filtering accuracy and meeting the high-precision filtering requirements of electronic equipment.

[0033] The outer shielding box 1 and the L-shaped cover plate 3 are made of electromagnetic shielding materials, and a good electromagnetic shielding space is formed through a reasonable assembly structure, so that external electromagnetic interference can be effectively blocked, the anti-interference ability of the filter is improved, and stable operation of the filter is ensured.

[0034] The heat-conducting plugboard 11 arranged on the outer wall of the outer shielding box 1 can quickly conduct the heat generated in the filter to the outer wall and dissipate the heat, so that the performance of the filter is prevented from being reduced due to heat accumulation, the service life of the filter is prolonged, and the stability of the filter under long-time work is ensured.

[0035] The detachable connection mode of the filter assembly 7 and the end cover 6, and the cooperation structure of the end cover 6 and the first limiting seat 4 and the second limiting seat 5 make the filter more convenient to install and maintain. Meanwhile, the asymmetric design of the end cover 6 and the arrangement of the concentric assembly groove 62 improve the installation accuracy and the structural stability of the filter assembly 7.

[0036] The above is only the best implementation mode adopted by the application in combination with the current actual demand, but the protection scope of the application is not limited thereto.

Claims

1. A precision inductor filter, comprising a base (2) and a filter assembly (7) disposed on the base (2), characterized in that, The filter component (7) includes multiple sets of coaxially sleeved coaxial magnetic tubes (71), the spacing between adjacent coaxial magnetic tubes (71) is equal, and a helical coil winding (72) is wound between adjacent coaxial magnetic tubes (71). Both ends of the filter assembly (7) are detachably connected to end caps (6). The top two sides of the base (2) are respectively fixed with a first limiting seat (4) and a second limiting seat (5) that cooperate with the end caps (6). The first limiting seat (4) is provided with a limiting groove (41). The limiting groove (41) is provided with a conductive groove (42). The second limiting seat (5) is provided with a through groove (51). One side of the end cap (6) away from the filter assembly (7) is provided with a conductive protrusion (61) that cooperates with the conductive groove (42). The other side of the end cap (6) away from the filter assembly (7) is fixed with an outer shielding box (1). The base (2) is provided with an L-shaped cover plate (3) that cooperates with the outer shielding box (1). The bottom of the base (2) is also fixed with pins (21), and the spiral coil winding (72) is electrically connected to the pins (21) through the cooperation of the limiting groove (41) and the conductive protrusion (61).

2. A precision inductor filter according to claim 1, characterized in that, The outer shielding box (1) and the L-shaped cover plate (3) are both electromagnetic shielding materials. The L-shaped cover plate (3) is fixed on the top of the base (2). The first limiting seat (4) and the second limiting seat (5) are both fixed on the top of the L-shaped cover plate (3). The base (2) has insertion slots (22) on both sides of the L-shaped cover plate (3) that match the outer shielding box (1). The bottom edge of the L-shaped cover plate (3) abuts against the bottom of the outer shielding box (1) through the insertion slots (22). The side of the outer shielding box (1) that abuts against the L-shaped cover plate (3) is provided with a buckle structure (31).

3. A precision inductor filter according to claim 1, characterized in that, The outer wall of the outer shielding box (1) is provided with several heat-conducting plates (11), and the other end of the heat-conducting plates (11) extends to one side of the inner wall of the outer shielding box (1).

4. A precision inductor filter according to claim 1, characterized in that, The limiting groove (41) and the through groove (51) are both matched with the outer contour of the end cap (6), and the outer contour of the end cap (6) is asymmetrically arranged.

5. A precision inductor filter according to claim 1, characterized in that, Both sets of end caps (6) have several concentric mounting grooves (62) on opposite sides, which are matched with the ends of the coaxial magnetic tube (71).

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