CN201274209Y - Filter assembly - Google Patents

Abstract

The utility model discloses a filter assembly, which comprises a base, a magnetic core, at least one wire group and at least two pins. The base has a bottom wall and a fixed wall, and the fixed wall is arranged on the bottom wall to define an accommodating space. At least one wire group is wound on the magnetic core. At least two pins are arranged outside the fixed wall. Wherein, the magnetic core wound with at least one wire group is placed in the accommodating space, and the two ends of the at least one wire group pass through at least two wire holes of the fixed wall to be respectively connected to at least two pins. Therefore, the volume of the filter assembly can be reduced, interference to peripheral electronic devices can be avoided, and the wire group and magnetic core can be protected from damage.

Description

A filter assembly

technical field

The utility model relates to a filter assembly, in particular to a filter assembly which is small in size, can avoid interference with peripheral electronic devices, and can protect internal wire groups and magnetic cores from being damaged.

Background technique

In recent years, the high-tech industry has become increasingly prosperous, and the opportunities to use various electronic products in daily life have become more frequent. General electronic products contain many electronic components, and each electronic component is prone to generate a large amount of electromagnetic wave interference, so line filters are often used between electronic components and circuits to reduce electromagnetic wave interference. In order to improve the convenience of use and portability, miniaturization has become an inevitable trend in the design of electronic products today. Therefore, reducing the size of the necessary components - line filters - is the main goal of the industry to meet the overall size requirements of electronic products. One of the means.

The existing line filter 1 includes two sets of wires 11 (or called coils, windings), a core (not shown in the figure) and a base 13, the side view of which is shown in FIG. 1 . Two sets of wires 11 are respectively wound on both sides of the outer surface of the iron core, and the iron core is fixed on the base 13 after being wound with the wires 11 . The base 13 includes several pins 15 extending downward from the upper surface of the base 13 , and the lead wires at both ends of each wire group 11 need to be soldered to the pins 15 to form an electrical connection. Since the lead wires are drawn downwards to be welded to the pins 15 below the iron core, the solder joints 17 formed at the welding places between the lead wires and the pins 15 raise the overall height of the line filter 1 and form a 2-5 mm (mm) gap 10, such a structure not only occupies a larger volume in electronic products, but also easily causes damage and interference with adjacent electronic components when the wire group 11 of the line filter 1 is exposed, affecting the performance of the line filter. working normally.

To sum up, due to the poor structural design of current line filters, there are problems such as excessive volume, easy damage, and interference with peripheral electronic components. In view of this, how to improve the structural design of the line filter so as to reduce the size of the electronic product using the line filter and avoid the damage or interference of the line filter is an urgent goal in the industry.

Utility model content

The purpose of this utility model is to provide a filter assembly, which can make the volume occupied by the filter assembly in the applied electronic products smaller, and at the same time protect the wire group and magnetic core in the filter assembly from Damage caused by collisions and avoid electromagnetic interference to other surrounding electronic components.

To achieve the above purpose, a filter assembly is provided; comprising a base, a magnetic core, at least one wire group and at least two pins. The base has a bottom wall and a fixed wall. The fixed wall is arranged on the bottom wall to define an accommodating space. The fixed wall is provided with at least two wiring holes. At least one wire group has two ends, and at least one wire group is wound on the magnetic core. At least two pins are arranged outside the fixed wall. Wherein, the magnetic core wound with at least one wire group is placed in the accommodating space, and the two ends pass through at least two wire holes respectively to be connected to at least two pins respectively.

The filter assembly will occupy a smaller volume in the applied electronic products; in addition, placing the magnetic core wound with at least one wire group into the accommodation space defined by the fixed wall and the bottom wall can avoid collisions damage, while also reducing the interference caused to external electronic components during operation.

Description of drawings

Fig. 1 is the side view of existing line filter;

Fig. 2 is the schematic diagram of the filter assembly of the present utility model;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is a sectional view of the utility model filter assembly;

Fig. 5 is a schematic diagram of another filter assembly of the present invention.

Detailed ways

A preferred embodiment of the present utility model is shown in FIG. 2 , which mainly shows a schematic diagram of a filter assembly 2 of the present invention. The top view and cross-sectional view of the filter assembly 2 are shown in FIG. 3 and FIG. 4 respectively. It should be noted that Fig. 4 is a sectional view drawn along the section line A-A' of Fig. 2 . As shown in the figure, the filter assembly 2 includes a base 21 , a magnetic core 23 , two wire groups 25 , four pins 27 and an insert 28 .

The base 21 has a bottom wall 211 and a fixed wall 213 . The fixed wall 213 is disposed on the bottom wall 211 and defines an accommodating space together with the bottom wall 211 . The fixed wall 213 is provided with four wiring holes 213 a. In this embodiment, the fixed wall 213 is in the shape of a discontinuous cylinder and includes four gaps, and the aforementioned four wire holes 213 a are the four gaps. In other embodiments, the shape of the fixed wall 213 can also be a continuous cylinder. At this time, the fixed wall 213 includes four grooves, and the aforementioned four wire holes 213 a are these four grooves. As shown in each figure, the bottom wall 211 and the fixed wall 213 in this embodiment are two separate entities, wherein the bottom wall 211 and the fixed wall 213 can be fixed together by bonding, buckling or screwing. In other implementations, the bottom wall and the fixed wall can also be integrally formed. When implementing the invention, the material of the base 21 can adopt polyvinyl chloride (PVC), but the utility model is not limited by this material.

As shown in each figure, the magnetic core 23 is annular, and its material is selected from one of iron and iron alloy. In other implementations, the magnetic core 23 can also be other symmetrical shapes, such as a rectangle. The above-mentioned two sets of wires 25 are wound on the magnetic core 23. More specifically, the two sets of wires 25 are arranged oppositely and wound on both sides of the outer surface of the magnetic core 23, and each set of wires 25 has two ends. The magnetic core 23 of the winding wire group 25 is placed in the accommodating space, and a gap is maintained between the fixed wall 213 and the magnetic core 23 . It should be noted that the magnetic core 23 is adjacent to the bottom wall 211 after winding the wire group 25 , and the two are closely adjacent to each other. In addition, the cross-sectional area of the magnetic core 23 used in this embodiment is larger than that of conventional magnetic cores, thereby reducing the height of the magnetic core 23 and further reducing the volume of the filter assembly 2 .

The four pins 27 are arranged outside the fixed wall 213 . More specifically, as shown in FIG. 2 , the pins 27 of this embodiment are arranged on the edge of the bottom wall 213 and are L-shaped. One end of each L-shaped pin 27 protrudes laterally from the edge of the bottom wall 213, while the other end protrudes downwards from the bottom wall 213 for insertion and electrical connection to a circuit board below (not shown in the figure). ). However, those skilled in the art can also deduce other configuration positions and pin numbers. The two ends of each wire group 25 pass through the four wire holes 213a to be electrically connected to the four pins 27 respectively.

As shown in Figure 2, the insertion piece 28 of this embodiment is in the shape of an m, and its two opposite ends are fixedly embedded on the fixed wall 213, and the m-shaped notch of the insertion piece 28 is used for clamping and fixing The magnetic core 23, in other words, the bottom surface of the m-shaped notch of the insertion piece 28 is suitable for abutting against the upper edge of the magnetic core 23, so the insertion piece 28 of this invention can ensure the safety distance required by the safety regulations. In this embodiment, the material of the insert 28 is polyvinyl chloride (PVC), and its thickness is substantially 3.2 mm, but other materials and thicknesses can also be used in other embodiments, and are not limited to the above-mentioned . In addition, the insertion piece 28 is fixed on the base 21 by embedding, and at the same time, glue is used to make the connection more reliable, and other connection types can also be used in other implementations.

In addition to the m-shaped insert 28 used in this embodiment, in another embodiment of the invention, the filter assembly 5 can also use a T-shaped insert 58 as shown in FIG. 5 . Components of the filter assembly 5 such as: the base 51, the bottom wall 511, the fixed wall 513, the magnetic core 53 and the coil 55 are substantially the same as the corresponding components of the filter assembly 2 of the foregoing embodiment, the only difference is that the filter Insert 58 of device assembly 5 is a T font. Therefore, the two opposite ends of the insertion piece 58 are directly connected to the fixed wall 513 , and the T-shaped bottom is fixed on the bottom wall 511 of the base 51 . The lower left and lower right notches of the T-shaped insert piece 58 are used to clamp the fixed magnetic core 53 ; in this case, the coil 55 will be directly adjacent to the inner surface of the fixed wall 513 . As for the material and thickness of the inserting piece 58 used, they are the same as those described in the foregoing embodiments, and will not be repeated here.

It should be noted that the number of components and components of the present invention is not limited to that described herein. The number of slots can be adjusted according to the application.

To sum up, compared with conventional filters with the same power and current characteristics, in the filter assembly provided by this invention, the lead wires at both ends of the line group are not directly connected to the pins downwards, but Pass through the wire hole on the side fixed wall, so that there will be no gap between the magnetic core and the base wound with the cable group, and the overall height of the filter assembly will be reduced, thereby reducing the volume. In addition, the magnetic core wound with the wire group is fixed in the accommodation space defined by the bottom wall and the fixed wall on the base, so as to protect the wire group and the magnetic core in the filter assembly from damage caused by collision. damage, and at the same time reduce the interference caused by the filter assembly to the operation of external electronic components.

Claims (11)

1. A filter assembly, characterized in that it comprises a base, has a bottom wall and a fixed wall, the fixed wall is arranged on the bottom wall to define an accommodating space, and the fixed wall is provided with At least two wire holes; a magnetic core; at least one wire group, with two ends, the at least one wire group is wound on the magnetic core; and at least two pins, arranged outside the fixed wall; wherein, the at least one wire group is wound on the magnetic core It is placed in the accommodating space, and the two ends pass through the at least two wire holes respectively, so as to be respectively connected to the at least two pins. 2. The filter assembly as claimed in claim 1, wherein the at least two pins are disposed on an edge of the bottom wall. 3. The filter assembly of claim 1, comprising two sets of wires, each of the sets of wires having two ends. 4. The filter assembly as claimed in claim 3, wherein the fixed wall is provided with four wire holes. 5. The filter assembly as claimed in claim 4, wherein it comprises four pins, and the ends pass through the wire holes respectively to be connected to the pins respectively. 6. The filter assembly as claimed in claim 1, wherein the fixed wall is one of a continuous cylinder and a discontinuous cylinder. 7. The filter assembly as claimed in claim 6, wherein the discontinuous cylinder includes at least two gaps, and the at least two wire holes are the at least two gaps. 8. The filter assembly as claimed in claim 7, wherein the discontinuous cylinder includes at least two grooves, and the at least two wire holes are the at least two grooves. 9. The filter assembly as claimed in claim 1, further comprising an insertion piece, the insertion piece is straddled and fixed on the fixed wall, and is used for clamping and fixing the magnetic core. 10. The filter assembly as claimed in claim 1, wherein a gap is maintained between the fixed wall and the magnetic core. 11. The filter assembly as claimed in claim 1, wherein the magnetic core wound with the at least one wire group is disposed adjacent to the bottom wall.

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