Inductance filter convenient for coil to be connected with pins

Abstract

The inductance filter comprises a base, a first coil, a second coil and a magnetic ring, the base is provided with a first pin, a second pin, a third pin and a fourth pin, a first cushion block, a second cushion block, a third cushion block and a fourth cushion block are formed at the bottom of the base, and the outer side faces of the first cushion block, the second cushion block, the third cushion block and the fourth cushion block are provided with a first guide limiting groove, a second guide limiting groove, a third guide limiting groove and a fourth guide limiting groove respectively; an inclined first guide surface is arranged between the first cushion block and the second cushion block at the bottom of the base; an inclined second guide surface is arranged between the third cushion block and the fourth cushion block at the bottom of the base; a first wire end and a second wire end of the first coil pass through the first guide surface, are respectively limited by bypassing the second guide limiting grooves of the first cushion block and the second cushion block, and then are respectively spirally wound on the first pin and the second pin; and a third wire end and a fourth wire end of the second coil pass through the second guide surface, respectively bypass the third guide limiting groove and the fourth guide limiting groove to be limited, and then are respectively wound on the third pin and the fourth pin.

Description

Technical Field:

[0001] The utility model relates to the technical field of electronic component products, and particularly refers to an inductance filter facilitating the connection of coil pins. Background Art:

[0002] As a common electrical component, a filter is used in almost all electronic products. It has a simple principle and a wide range of applications.

[0003] The Chinese utility model patent with the application number 202220702544.2 discloses an inductance filter capable of adjusting leakage inductance, which includes a magnetic core, an L-shaped base and a planar base that cooperate with the magnetic core. The magnetic core includes two bottom columns and two side columns, and a rectangle is formed by fixedly connecting the two bottom columns and the side columns. Permeability columns are jointly embedded on the outer surfaces of the two bottom columns on the side away from the L-shaped base or the planar base. Secondary coils and primary coils are respectively wound on the outer surfaces of the two side columns; four first pins are fixedly installed at the bottom of the L-shaped base and on the side of the planar base away from the magnetic core, and the first pins are respectively connected to the adjacent secondary coils and primary coils.

[0004] The leads of the secondary coil and the primary coil of the above inductance filter are directly in contact with the bottom right angle of the L-shaped base and then wound with the first pins. Their connection is unstable, and the connection of the leads of the secondary coil and the primary coil to the first pins is not neat, and the phenomenon of lead relaxation is likely to occur, which is not conducive to improving the market competitiveness of the product. Moreover, both the secondary coil and the primary coil are vertically distributed, and the leads at their upper ends need to span a relatively long length before being connected to the first pins. Their connection is more unstable, and the phenomenon of lead relaxation is more likely to occur.

[0005] In view of this, the inventor of the present invention proposes the following technical solutions. Summary of the Utility Model:

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an inductance filter facilitating the connection of coil pins.

[0007] To solve the above technical problems, the present utility model adopts the following technical solutions: The inductance filter facilitating coil connection to pins includes a base, a first coil and a second coil horizontally distributed, and a magnetic ring matched and installed with the first coil and the second coil. The base is provided with a first pin, a second pin, a third pin, and a fourth pin for connecting to a PCB. Two ends of the first coil are respectively connected to the first pin and the second pin and fixed by soldering. Two ends of the second coil are respectively connected to the third pin and the fourth pin and fixed by soldering. First pads, second pads, third pads, and fourth pads are formed at the bottom of the base, respectively close to the first pin, the second pin, the third pin, and the fourth pin and for contacting the surface of the PCB. First guiding limiting grooves, second guiding limiting grooves, third guiding limiting grooves, and fourth guiding limiting grooves are respectively arranged on the outer sides of the first pad, the second pad, the third pad, and the fourth pad; A first inclined guiding surface is arranged between the first pad and the second pad at the bottom of the base; A second inclined guiding surface is arranged between the third pad and the fourth pad at the bottom of the base; After the first wire end and the second wire end of the first coil pass through the first guiding surface and are respectively bypassed and limited by the first guiding limiting groove of the first pad and the second guiding limiting groove of the second pad, they are respectively spirally wound around the first pin and the second pin; After the third wire end and the fourth wire end of the second coil pass through the second guiding surface and are respectively bypassed and limited by the third guiding limiting groove of the third pad and the fourth guiding limiting groove of the fourth pad, they are respectively wound around the third pin and the fourth pin.

[0008] Furthermore, in the above technical solution, spiral grooves are arranged on the outer surfaces of the first pin, the second pin, the third pin, and the fourth pin. The first wire end or the second wire end or the third wire end or the fourth wire end is limited by the spiral grooves. The soldering tin on the first pin wraps the first wire end and fills the spiral groove. The soldering tin on the second pin wraps the second wire end and fills the spiral groove. The soldering tin on the third pin wraps the third wire end and fills the spiral groove; The soldering tin on the fourth pin wraps the fourth wire end and fills the spiral groove.

[0009] Furthermore, in the above technical solution, two first wire winding parts and second wire winding parts which are spaced apart from each other in the left-right direction and have an annular groove structure are arranged in the middle of the base. The first coil and the second coil are respectively wound in the first wire winding part and the second wire winding part, and the first coil and the second coil do not protrude outside the base. A jack penetrating the left and right side surfaces of the base is arranged in the middle of the base, and the jack passes through the middle parts of the first wire winding part and the second wire winding part. The magnetic ring includes two first magnetic ring bodies and second magnetic ring bodies which are in a semi-square frame shape and can be butted to form a square frame shape. The first magnetic ring body and the second magnetic ring body are respectively inserted inward along both sides of the base, and the lower parts of the first magnetic ring body and the second magnetic ring body are both embedded in the jack and butted, and pass through the centers of the first coil and the second coil. The upper parts of the first magnetic ring body and the second magnetic ring body are both placed on the upper end surface of the base and butted. A metal clamping piece in a semi-square frame shape clamps the upper end surfaces and outer side surfaces of the first magnetic ring body and the second magnetic ring body from top to bottom, and clamps and fixes the first magnetic ring body and the second magnetic ring body.

[0010] Furthermore, in the above technical solution, a left limiting groove and a right limiting groove are respectively arranged on the left and right sides of the base. The left limiting groove communicates with the left side of the jack, the right limiting groove communicates with the right side of the jack, the middle part of the first magnetic ring body is further embedded in the left limiting groove, and the middle part of the second magnetic ring body is further embedded in the right limiting groove.

[0011] Furthermore, in the above technical solution, the middle part of the first magnetic ring body and the left limiting groove are also fixedly adhered by glue, and the middle part of the second magnetic ring body and the right limiting groove are also fixedly adhered by glue.

[0012] Furthermore, in the above technical solution, the metal clamping piece includes a transverse piece, a first clamping piece and a second clamping piece which are bent downward from the left and right ends of the transverse piece, and a third clamping piece and a fourth clamping piece which are bent downward from the front and back sides of the transverse piece. The lower ends of the first clamping piece and the second clamping piece are respectively clamped and positioned on the outer side surfaces of the first magnetic ring body and the second magnetic ring body. The third clamping piece and the fourth clamping piece respectively sandwich the front and back sides of the gap where the first magnetic ring body and the second magnetic ring body are in contact at the upper end, and partially cover the front and back sides of the gap.

[0013] Furthermore, in the above technical solution, the first clamping piece and the second clamping piece are also respectively embedded in the left limiting groove and the right limiting groove.

[0014] Furthermore, in the above technical solution, the first clamping piece and the outer side surface of the first magnetic ring body are also fixedly adhered by glue; the second clamping piece and the outer side surface of the second magnetic ring body are also fixedly adhered by glue.

[0015] Furthermore, in the above technical solution, the inner sides of the upper and lower ends of the first magnetic ring body are both flat surfaces, and the inner sides of the upper and lower ends of the second magnetic ring body are both flat surfaces. The inner sides of the upper and lower ends of the first magnetic ring body are in planar contact with the inner sides of the upper and lower ends of the second magnetic ring body. Or, first grooves are provided on the inner sides of the upper and lower ends of the first magnetic ring body, and first protrusions are provided on the inner sides of the upper and lower ends of the second magnetic ring body. After the inner sides of the upper and lower ends of the first magnetic ring body are docked with the inner sides of the upper and lower ends of the second magnetic ring body, the first protrusions are docked with the first grooves for clamping and positioning. Or, first grooves are provided on the inner sides of the upper and lower ends of the second magnetic ring body, and first protrusions are provided on the inner sides of the upper and lower ends of the first magnetic ring body. After the inner sides of the upper and lower ends of the second magnetic ring body are docked with the inner sides of the upper and lower ends of the first magnetic ring body, the first protrusions are docked with the first grooves for clamping and positioning.

[0016] Furthermore, in the above technical solution, a dividing cover plate for separating the first winding portion and the second winding portion is also formed in the middle of the base. The dividing cover plate is disposed between the first winding portion and the second winding portion, and the lower end surface of the dividing cover plate is flush with the lower end surfaces of the first cushion block, the second cushion block, the third cushion block, and the fourth cushion block.

[0017] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art:

[0018] 1. The first cushion block, the second cushion block, the third cushion block and the fourth cushion block are formed at the bottom of the base of the utility model, so that when the utility model is welded and fixed on the PCB, the first cushion block, the second cushion block, the third cushion block and the fourth cushion block are all in contact with the surface of the PCB, and thus a gap is formed between the bottom of the base and the surface of the PCB. This is convenient for the first pin, the second pin, the third pin and the fourth pin to form air flow when inserted into the PCB and subjected to reflow soldering, thereby ensuring the welding quality between the first pin, the second pin, the third pin, the fourth pin and the PCB. After the first wire end and the second wire end of the first coil pass through the first guiding surface and are respectively bypassed and defined by the first guiding limiting groove of the first cushion block and the second guiding limiting groove of the second cushion block, they are respectively spirally wound around the first pin and the second pin. Among them, the first wire end and the second wire end of the first coil are in contact with the first guiding surface rather than the right-angle side, which can protect the first wire end and the second wire end. And the first wire end and the second wire end need to be defined by the first guiding limiting groove and the second guiding limiting groove and then respectively spirally wound around the first pin and the second pin. This connection is convenient, and can ensure the neatness of the first wire end and the second wire end, and at the same time ensure that the first wire end and the second wire end can form a stable connection with the first pin and the second pin, and there will be no phenomenon of slack of the first wire end and the second wire end; After the third wire end and the fourth wire end of the second coil pass through the second guiding surface and are respectively bypassed and defined by the third guiding limiting groove of the third cushion block and the fourth guiding limiting groove of the fourth cushion block, they are respectively wound around the third pin and the fourth pin. Among them, the third wire end and the fourth wire end of the second coil are in contact with the third guiding surface rather than the right-angle side, which can protect the third wire end and the fourth wire end of the second coil. And the third wire end and the fourth wire end of the second coil need to be defined by the third guiding limiting groove and the fourth guiding limiting groove and then respectively spirally wound around the third pin and the fourth pin. This connection is convenient, and can ensure the neatness of the third wire end and the fourth wire end, and at the same time ensure that the third wire end and the fourth wire end can form a stable connection with the third pin and the fourth pin, and there will be no phenomenon of slack of the third wire end and the fourth wire end; On this basis, the first coil and the second coil are horizontally distributed, so that the first wire end and the second wire end of the first coil can be closest to the first pin and the second pin to the greatest extent, and their lengths are relatively short. At the same time, the third wire end and the fourth wire end of the second coil can be closest to the third pin and the fourth pin to the greatest extent, and their lengths are relatively short. This can not only ensure the stability of the connection between the first wire end and the second wire end of the first coil, the third wire end and the fourth wire end of the second coil and the corresponding pins, but also ensure the neatness, and at the same time avoid the phenomenon of slack, ensuring the quality of the product.

[0019] 2. In the present utility model, the first coil and the second coil are respectively wound around the peripheries of the first winding part and the second winding part in the middle of the base. Since the first winding part and the second winding part are in a ring groove structure and there is no obstruction outside, it is more convenient to wind the first coil and the second coil, and the process is simple, the efficiency of winding the coil is high, and the first coil and the second coil do not protrude outside the base, which can better protect the first coil and the second coil. In addition, in the present utility model, the magnetic ring is divided into a first magnetic ring body and a second magnetic ring body which are in a semi-square frame shape and can be butted to form a square frame shape. The first magnetic ring body and the second magnetic ring body are installed in the base by means of insertion and butted to form a complete ring structure. The lower parts of the first magnetic ring body and the second magnetic ring body are both embedded in the jacks in the middle of the base and pass through the centers of the first coil and the second coil after being butted, so that the first coil and the second coil are indirectly wound on the first magnetic ring body and the second magnetic ring body, playing the same role as the structure of directly winding the coil on the annular magnetic ring in the conventional case. Finally, the first magnetic ring body and the second magnetic ring body are clamped and fixed by a metal clamping piece, so that the magnetic ring formed by the first magnetic ring body and the second magnetic ring body is stably installed in the base. Its assembly structure is novel. Compared with the non-separable annular magnetic ring, the magnetic ring structure of the present utility model is more convenient for installation, and can be inserted and assembled with the jack of the base, the assembly structure is more stable, the magnetic ring and the base are not easily separated relatively, ensuring the quality of the assembly. And there is no need to directly wind the coil on the magnetic ring, making the coil winding more convenient and with higher efficiency. In addition, the metal clamping piece not only serves the purpose of clamping the first magnetic ring body and the second magnetic ring body, but also can prevent the first magnetic ring body and the second magnetic ring body from directly contacting with external objects, thus achieving the purpose of protecting the first magnetic ring body and the second magnetic ring body. Brief Description of the Drawings:

[0020] Figure 1 is a perspective view of the present utility model (the first and second coils are not wound);

[0021] Figure 2 is a perspective view of another angle of the present utility model (the first and second coils are not wound);

[0022] Figure 3 is the front view of the present utility model;

[0023] Figure 4 is the sectional view of the present utility model. Detailed Embodiment:

[0024] The present utility model will be further described below in conjunction with specific embodiments and the drawings.

[0025] See Figures 1-4As shown in the figure, it is an inductance filter that facilitates the connection of the coil to the pins. It includes a base 1, a first coil 3 and a second coil 4 horizontally distributed, and a magnetic ring 2 that is matched and installed with the first coil 3 and the second coil 4. The base 1 is provided with a first pin 61, a second pin 62, a third pin 63, and a fourth pin 64 for connecting to the PCB. The two ends of the first coil 3 are respectively connected to the first pin 61 and the second pin 62 and fixed by soldering with solder 100. The two ends of the second coil 4 are respectively connected to the third pin 63 and the fourth pin 64 and fixed by soldering with solder 100.

[0026] Among them, first cushion blocks 101, second cushion blocks 102, third cushion blocks 103, and fourth cushion blocks 104 which are respectively close to the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 and are used for contacting the surface of the PCB are formed at the bottom of the base 1. First guiding limiting grooves, second guiding limiting grooves 106, third guiding limiting grooves 107, and fourth guiding limiting grooves 108 are respectively arranged on the outer side surfaces of the first cushion blocks 101, the second cushion blocks 102, the third cushion blocks 103, and the fourth cushion blocks 104; an inclined first guiding surface 181 is arranged between the first cushion blocks 101 and the second cushion blocks 102 at the bottom of the base 1; an inclined second guiding surface 182 is arranged between the third cushion blocks 103 and the fourth cushion blocks 104 at the bottom of the base 1; the first wire end 31 and the second wire end 32 of the first coil 3 pass through the first guiding surface 181 and are respectively bypassed and limited by the first guiding limiting groove of the first cushion block 101 and the second guiding limiting groove 106 of the second cushion block 102, and then are respectively spirally wound around the first pin 61 and the second pin 62; the third wire end 41 and the fourth wire end 42 of the second coil 4 pass through the second guiding surface 182 and are respectively bypassed and limited by the third guiding limiting groove 107 of the third cushion block 103 and the fourth guiding limiting groove 108 of the fourth cushion block 104, and then are respectively wound around the third pin 63 and the fourth pin 64. First of all, the first cushion blocks 101, the second cushion blocks 102, the third cushion blocks 103, and the fourth cushion blocks 104 are formed at the bottom of the base 1 of the present invention, so that when the present invention is welded and fixed on the PCB, the first cushion blocks 101, the second cushion blocks 102, the third cushion blocks 103, and the fourth cushion blocks 104 are all in contact with the surface of the PCB, and thus a gap is formed between the bottom of the base 1 and the surface of the PCB, which is convenient for air flow to be formed when the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 are inserted into the PCB and reflow soldered, thereby ensuring the welding quality of the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 and the PCB.Secondly, after the first wire end 31 and the second wire end 32 of the first coil 3 pass through the first guiding surface 181 and are respectively limited by bypassing the first guiding limiting groove of the first spacer 101 and the second guiding limiting groove 106 of the second spacer 102, they are respectively spirally wound around the first pin 61 and the second pin 62. Among them, the first wire end 31 and the second wire end 32 of the first coil 3 are in contact with the first guiding surface 181 instead of the right-angle side, which can protect the first wire end 31 and the second wire end 32. And the first wire end 31 and the second wire end 32 need to be limited by the first guiding limiting groove and the second guiding limiting groove 106 and then spirally wound around the first pin 61 and the second pin 62 respectively. The connection is convenient, and the neatness of the first wire end 31 and the second wire end 32 can be ensured. At the same time, it is ensured that the first wire end 31 and the second wire end 32 can form a stable connection with the first pin 61 and the second pin 62, and there will be no phenomenon of slack of the first wire end 31 and the second wire end 32. The third wire end 41 and the fourth wire end 42 of the second coil 4 pass through the second guiding surface 182 and are respectively limited by bypassing the third guiding limiting groove 107 of the third spacer 103 and the fourth guiding limiting groove 108 of the fourth spacer 104, and then are respectively wound around the third pin 63 and the fourth pin 64. Among them, the third wire end 41 and the fourth wire end 42 of the second coil 4 are in contact with the third guiding surface 182 instead of the right-angle side, which can protect the third wire end 41 and the fourth wire end 42 of the second coil 4. And the third wire end 41 and the fourth wire end 42 of the second coil 4 need to be limited by the third guiding limiting groove 107 and the fourth guiding limiting groove 108 and then spirally wound around the third pin 63 and the fourth pin 64 respectively. The connection is convenient, and the neatness of the third wire end 41 and the fourth wire end 42 can be ensured. At the same time, it is ensured that the third wire end 41 and the fourth wire end 42 can form a stable connection with the third pin 63 and the fourth pin 64, and there will be no phenomenon of slack of the third wire end 41 and the fourth wire end 42. On this basis, the first coil 3 and the second coil 4 are horizontally distributed, so that the first wire end 31 and the second wire end 32 of the first coil 3 can be closest to the first pin 61 and the second pin 62 to the greatest extent, and their lengths are relatively short. At the same time, the third wire end 41 and the fourth wire end 42 of the second coil 4 can be closest to the third pin 63 and the fourth pin 64 to the greatest extent, and their lengths are relatively short. This can not only ensure the stability of the connection between the first wire end 31 and the second wire end 32 of the first coil 3, the third wire end 41 and the fourth wire end 42 of the second coil 4 and the corresponding pins, but also ensure the neatness, and at the same time avoid the slack phenomenon and ensure the quality of the product.

[0027] The outer surfaces of the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 are all provided with spiral grooves 60. The upper ends of the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 are fixed to the base by in-mold injection. The spiral grooves 60 outside the upper ends of the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 are all filled by the base, thereby ensuring that the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 are fixed to the lower end of the base more stably.

[0028] Meanwhile, the spiral grooves 60 define the first wire end 31 or the second wire end 32 or the third wire end 41 or the fourth wire end 42. The solder on the first pin 61 wraps the first wire end 31 and fills the spiral groove 60. The solder on the second pin 62 wraps the second wire end 32 and fills the spiral groove 60. The solder on the third pin 63 wraps the third wire end 41 and fills the spiral groove 60. The solder on the fourth pin 64 wraps the fourth wire end 42 and fills the spiral groove 60, thereby ensuring that the first wire end 31, the second wire end 32, the third wire end 41, and the fourth wire end 42 form a more stable connection with the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 respectively, and ensuring the welding quality.

[0029] Furthermore, during later use, when the lower ends of the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 are inserted into the corresponding solder holes of the PCB and fixed by soldering the pins, the solder also melts into the spiral grooves 60 outside the lower ends of the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64, thereby further ensuring the welding stability and enabling the present utility model to be more stably installed on the PCB.

[0030] Two first winding parts 11 and second winding parts 12 which are spaced apart from each other in the left - right direction and have an annular groove structure are provided in the middle of the base 1. The first coil 3 and the second coil 4 are respectively wound in the first winding part 11 and the second winding part 12, and the first coil 3 and the second coil 4 do not protrude outside the base 1. A jack 13 penetrating the left and right side surfaces of the base 1 is provided in the middle of the base 1, and the jack 13 transversely passes through the middle parts of the first winding part 11 and the second winding part 12. The magnetic ring 2 includes two first magnetic ring bodies 21 and second magnetic ring bodies 22 which are in a semi - square shape and can be butted to form a square shape. The first magnetic ring body 21 and the second magnetic ring body 22 are respectively inserted inward along both sides of the base 1, and the lower parts of the first magnetic ring body 21 and the second magnetic ring body 22 are both embedded in the jack 13 and butted, and pass through the centers of the first coil 3 and the second coil 4. The upper parts of the first magnetic ring body 21 and the second magnetic ring body 22 are both placed on the upper end surface of the base and butted. The semi - square - shaped metal clamping piece 5 clamps the upper end surfaces and the outer side surfaces of the first magnetic ring body 21 and the second magnetic ring body 22 from top to bottom, and clamps and fixes the first magnetic ring body 21 and the second magnetic ring body 22.That is to say, in the present utility model, the first coil 3 and the second coil 4 are respectively wound around the peripheries of the first winding portion 11 and the second winding portion 12 in the middle of the base 1. Since the first winding portion 11 and the second winding portion 12 are in a ring groove structure and there is no obstruction outside, it is more convenient to wind the first coil 3 and the second coil 4, with simple technology, high winding efficiency of the coils, and the first coil 3 and the second coil 4 do not protrude outside the base, which can better protect the first coil 3 and the second coil 4. In addition, in the present utility model, the magnetic ring 2 is divided into a first magnetic ring body 21 and a second magnetic ring body 22 which are in a semi-square frame shape and can be butted to form a square frame shape. The first magnetic ring body 21 and the second magnetic ring body 22 are installed in the base 1 by an insertion method and are butted to form a complete ring structure. The lower parts of the first magnetic ring body 21 and the second magnetic ring body 22 are both embedded in the jack 13 in the middle of the base and pass through the centers of the first coil 3 and the second coil 4 after being butted, so that the first coil 3 and the second coil 4 are indirectly wound on the first magnetic ring body 21 and the second magnetic ring body 22, playing the same role as the conventional structure of directly winding the coil on the annular magnetic ring. Finally, the first magnetic ring body 21 and the second magnetic ring body 22 are clamped and fixed by the metal clamping piece 5, so that the magnetic ring 2 formed by the first magnetic ring body 21 and the second magnetic ring body 22 is stably installed in the base 1. Its assembly structure is novel. Compared with the non-separable annular magnetic ring, the magnetic ring structure of the present utility model is more convenient for installation, can be inserted and assembled with the jack of the base, the assembly structure is more stable, the magnetic ring and the base are not easily separated relatively, ensuring the quality of the assembly. And there is no need to directly wind the coil on the magnetic ring, making the coil winding more convenient and with higher efficiency. In addition, the metal clamping piece 5 not only serves to clamp the first magnetic ring body 21 and the second magnetic ring body 22, but also can prevent the first magnetic ring body 21 and the second magnetic ring body 22 from directly contacting external objects, thereby achieving the purpose of protecting the first magnetic ring body 21 and the second magnetic ring body 22.

[0031] In order to make the assembly of the first magnetic ring body 21 and the second magnetic ring body 22 with the base more stable, the following settings are also made:

[0032] The left limiting groove 15 and the right limiting groove 16 are respectively arranged on the left and right sides of the base 1. The left limiting groove 15 communicates with the left side of the jack 13, and the right limiting groove 16 communicates with the right side of the jack 13. The middle part of the first magnetic ring body 21 is also embedded in the left limiting groove 15, and the middle part of the second magnetic ring body 22 is also embedded in the right limiting groove 16, thereby ensuring that the assembly of the first magnetic ring body 21 and the second magnetic ring body 22 with the base is more stable. Further, the middle part of the first magnetic ring body 21 and the left limiting groove 15 are also fixed by glue, and the middle part of the second magnetic ring body 22 and the right limiting groove 16 are also fixed by glue, thereby further ensuring the stability of the assembly structure of the first magnetic ring body 21 and the second magnetic ring body 22 with the base, so that the magnetic ring and the base are stably assembled together and will not accidentally separate.

[0033] The assembly structure between the first magnetic ring body 21 and the second magnetic ring body 22 includes at least the following three types:

[0034] The first assembly structure is that the inner sides of the upper and lower ends of the first magnetic ring body 21 are both flat surfaces, and the inner sides of the upper and lower ends of the second magnetic ring body 22 are both flat surfaces. The inner sides of the upper and lower ends of the first magnetic ring body 21 are in flat contact with the inner sides of the upper and lower ends of the second magnetic ring body 22.

[0035] The second assembly structure is that the inner sides of the upper and lower ends of the first magnetic ring body 21 are provided with first grooves 222, and the inner sides of the upper and lower ends of the second magnetic ring body 22 are provided with first protrusions 221. After the inner sides of the upper and lower ends of the first magnetic ring body 21 are docked with the inner sides of the upper and lower ends of the second magnetic ring body 22, the first protrusions 221 are docked with the first grooves 222 for clamping and positioning.

[0036] The third assembly structure is that the inner sides of the upper and lower ends of the second magnetic ring body 22 are provided with first grooves, and the inner sides of the upper and lower ends of the first magnetic ring body 21 are provided with first protrusions. After the inner sides of the upper and lower ends of the second magnetic ring body 22 are docked with the inner sides of the upper and lower ends of the first magnetic ring body 21, the first protrusions are docked with the first grooves for clamping and positioning.

[0037] The second and third assembly structures are relatively better. They can not only increase the contact area between the first magnetic ring body 21 and the second magnetic ring body 22, but also further make the assembly structure between the first magnetic ring body 21 and the second magnetic ring body 22 more stable, achieving dual technical effects.

[0038] A dividing cover plate 17 for separating the first winding part 11 and the second winding part 12 is also formed in the middle of the base 1. The dividing cover plate 17 is placed between the first winding part 11 and the second winding part 12, which serves the purpose of well separating the first coil 3 and the second coil 4, so that the first coil 3 and the second coil 4 do not interfere with each other.

[0039] The metal clamping piece 5 includes a transverse piece 51, a first clamping piece 52 and a second clamping piece 53 bent downward from both ends of the transverse piece 51, and a third clamping piece 54 and a fourth clamping piece 55 bent downward from the front and rear sides of the transverse piece 51. Among them, the clamping angle between the first clamping piece 52 and the transverse piece 51 is less than 90 degrees, the clamping angle between the second clamping piece 53 and the transverse piece 51 is less than 90 degrees, and the length of the transverse piece 51 is greater than the width of the upper end of the magnetic ring 2. The lower surface of the transverse piece 51 is mounted on the upper end surfaces of the first magnetic ring body 21 and the second magnetic ring body 22. The lower ends of the first clamping piece 52 and the second clamping piece 53 are respectively clamped and positioned on the outer side surfaces of the first magnetic ring body 21 and the second magnetic ring body 22. The third clamping piece 54 and the fourth clamping piece 55 are respectively clamped on the front and rear sides of the gap 20 where the upper ends of the first magnetic ring body 21 and the second magnetic ring body 22 are in contact, and partially cover the front and rear sides of the gap 20, thereby ensuring that the metal clamping piece 5 can stably clamp and fix the upper ends of the first magnetic ring body 21 and the second magnetic ring body 22. Since the clamping angles between the first clamping piece 52 and the second clamping piece 53 and the transverse piece 51 are both less than 90 degrees, the first clamping piece 52 and the second clamping piece 53 can form sufficient elastic capacity relative to the transverse piece 51, and thus can more stably clamp and fix the outer side surfaces of the first magnetic ring body 21 and the second magnetic ring body 22 respectively, ensuring the stability of the assembly structure.

[0040] The first clamping piece 52 and the second clamping piece 53 are respectively embedded in the left limiting groove 15 and the right limiting groove 16, thereby ensuring that the metal clamping piece 5 can also be stably mounted on the base, and at the same time, further ensuring the stability of the assembly structure of the first magnetic ring body 21 and the second magnetic ring body 22, so that the first magnetic ring body 21 and the second magnetic ring body 22 form a stable magnetic ring.

[0041] The first clamping piece 52 and the outer side surface of the first magnetic ring body 21 are also fixedly adhered by glue; the second clamping piece 53 and the outer side surface of the second magnetic ring body 22 are also fixedly adhered by glue, and its structure is more stable.

[0042] In summary, the first cushion block 101, the second cushion block 102, the third cushion block 103, and the fourth cushion block 104 are formed at the bottom of the base 1 of the present utility model, so that when the present utility model is welded and fixed on the PCB, the first cushion block 101, the second cushion block 102, the third cushion block 103, and the fourth cushion block 104 are all in contact with the surface of the PCB, and thus a gap is formed between the bottom of the base 1 and the surface of the PCB, which facilitates the formation of air flow when the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 are inserted into the PCB and reflow soldered, thereby ensuring the welding quality of the first pin 61, the second pin 62, the third pin 63, and the fourth pin 64 with the PCB.After the first wire end 31 and the second wire end 32 of the first coil 3 pass through the first guiding surface 181 and are respectively bypassed and defined by the first guiding limiting groove of the first cushion block 101 and the second guiding limiting groove 106 of the second cushion block 102, they are respectively spirally wound around the first pin 61 and the second pin 62. Among them, the first wire end 31 and the second wire end 32 of the first coil 3 are in contact with the first guiding surface 181 instead of the right-angle side, which can protect the first wire end 31 and the second wire end 32. And the first wire end 31 and the second wire end 32 need to be defined by the first guiding limiting groove and the second guiding limiting groove 106 and then respectively spirally wound around the first pin 61 and the second pin 62, which can ensure the neatness of the first wire end 31 and the second wire end 32, and at the same time ensure that the first wire end 31 and the second wire end 32 can form a stable connection with the first pin 61 and the second pin 62, and there will be no phenomenon of slack of the first wire end 31 and the second wire end 32; After the third wire end 41 and the fourth wire end 42 of the second coil 4 pass through the second guiding surface 182 and are respectively bypassed and defined by the third guiding limiting groove 107 of the third cushion block 103 and the fourth guiding limiting groove 108 of the fourth cushion block 104, they are respectively wound around the third pin 63 and the fourth pin 64. Among them, the third wire end 41 and the fourth wire end 42 of the second coil 4 are in contact with the third guiding surface 182 instead of the right-angle side, which can protect the third wire end 41 and the fourth wire end 42 of the second coil 4. And the third wire end 41 and the fourth wire end 42 of the second coil 4 need to be defined by the third guiding limiting groove 107 and the fourth guiding limiting groove 108 and then respectively spirally wound around the third pin 63 and the fourth pin 64, which can ensure the neatness of the third wire end 41 and the fourth wire end 42, and at the same time ensure that the third wire end 41 and the fourth wire end 42 can form a stable connection with the third pin 63 and the fourth pin 64, and there will be no phenomenon of slack of the third wire end 41 and the fourth wire end 42; On this basis, the first coil 3 and the second coil 4 are horizontally distributed, so that the first wire end 31 and the second wire end 32 of the first coil 3 can be closest to the first pin 61 and the second pin 62 to the greatest extent, and their lengths are relatively short. At the same time, the third wire end 41 and the fourth wire end 42 of the second coil 4 can be closest to the third pin 63 and the fourth pin 64 to the greatest extent, and their lengths are relatively short. This can not only ensure the stability of the connection between the first wire end 31 and the second wire end 32 of the first coil 3, the third wire end 41 and the fourth wire end 42 of the second coil 4 and the corresponding pins, but also ensure the neatness, and at the same time avoid the slack phenomenon and ensure the quality of the product.

[0043] Certainly, the above are only specific embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention shall be included in the scope of the patent application of the present invention.

Claims

1. An inductor filter for convenient coil connection pins, comprising a base (1), a first coil (3) and a second coil (4) arranged horizontally, and a magnetic ring (2) mounted to match the first coil (3) and the second coil (4), the base (1) being provided with a first pin (61), a second pin (62), a third pin (63), and a fourth pin (64) for connecting to a PCB, the two ends of the first coil (3) being respectively connected to the first pin (61) and the second pin (62) and fixed by soldering, the two ends of the second coil (4) being respectively connected to the third pin (63) and the fourth pin (64) and fixed by soldering, characterized in that: The bottom of the base (1) is formed with a first pad (101), a second pad (102), a third pad (103) and a fourth pad (104) respectively close to the first pin (61), the second pin (62), the third pin (63) and the fourth pin (64) and used for contacting the surface of the PCB, and the outer sides of the first pad (101), the second pad (102), the third pad (103) and the fourth pad (104) are respectively provided with a first guide limit groove, a second guide limit groove (106), a third guide limit groove (107) and a fourth guide limit groove (108); The bottom of the base (1) is provided with an inclined first guide surface (181) between the first cushion block (101) and the second cushion block (102); the bottom of the base (1) is provided with an inclined second guide surface (182) between the third cushion block (103) and the fourth cushion block (104); the first wire end (31) and the second wire end (32) of the first coil (3) pass through the first guide surface (181) and bypass the first guide limit groove of the first cushion block (101) and the second cushion block (104) respectively. 02) is limited, and then spirally wound around the first pin (61) and the second pin (62) respectively; the third wire end (41) and the fourth wire end (42) of the second coil (4) pass through the second guide surface (182) and respectively bypass the third guide limit groove (107) of the third cushion block (103) and the fourth guide limit groove (108) of the fourth cushion block (104) and are limited, and then spirally wound around the third pin (63) and the fourth pin (64) respectively.

2. The inductor filter for facilitating coil connection pins according to claim 1, characterized in that: The outer surfaces of the first pin (61), the second pin (62), the third pin (63), and the fourth pin (64) are all provided with a spiral groove (60), and the first wire end (31) or the second wire end (32) or the third wire end (41) or the fourth wire end (42) is defined by the spiral groove (60), and the solder on the first pin (61) wraps the first wire end (31) and fills the spiral groove (60), the solder on the second pin (62) wraps the second wire end (32) and fills the spiral groove (60), the solder on the third pin (63) wraps the third wire end (41) and fills the spiral groove (60); and the solder on the fourth pin (64) wraps the fourth wire end (42) and fills the spiral groove (60).

3. The inductor filter for convenient coil connection pins according to claim 1, characterized in that: The base (1) is provided with two first winding parts (11) and second winding parts (12) which are spaced from each other in the left and right directions and are in annular groove structures in the middle part, the first coil (3) and the second coil (4) are respectively wound in the first winding part (11) and the second winding part (12), and the first coil (3) and the second coil (4) do not protrude from the base (1); the base (1) is provided with a plug hole (13) which passes through the left and right sides thereof in the middle part, and the plug hole (13) crosses the middle part of the first winding part (11) and the second winding part (12); the magnetic ring (2) comprises two first magnetic ring bodies (2) which are in the shape of semi-square frames and can be connected to form a square frame. 1) and a second magnetic ring body (22), the first magnetic ring body (21) and the second magnetic ring body (22) are respectively inserted inwardly along the two sides of the base (1), and the lower parts of the first magnetic ring body (21) and the second magnetic ring body (22) are both embedded in the insertion hole (13) and connected, and pass through the center of the first coil (3) and the second coil (4); the upper parts of the first magnetic ring body (21) and the second magnetic ring body (22) are both placed on the upper end surface of the base (1) and connected; the metal clamping sheet (5) in the shape of a semi-square frame clamps the upper end surface and the outer side surface of the first magnetic ring body (21) and the second magnetic ring body (22) from top to bottom, and clamps and fixes the first magnetic ring body (21) and the second magnetic ring body (22).

4. The inductor filter for facilitating coil connection pins according to claim 3, characterized in that: A left limiting groove (15) and a right limiting groove (16) are respectively provided on the left and right sides of the base (1); the left limiting groove (15) is connected to the left side of the insertion hole (13); the right limiting groove (16) is connected to the right side of the insertion hole (13); the middle part of the first magnetic ring body (21) is also embedded in the left limiting groove (15); and the middle part of the second magnetic ring body (22) is also embedded in the right limiting groove (16).

5. The inductor filter for convenient coil connection pins according to claim 4, characterized in that: The middle portion of the first magnetic ring body (21) and the left limit groove (15) are bonded together by glue, and the middle portion of the second magnetic ring body (22) and the right limit groove (16) are bonded together by glue.

6. An inductor filter for facilitating coil connection pins according to any one of claims 4-5, characterized in that: The metal clamping sheet (5) comprises a transverse sheet (51), a first clamping sheet (52) and a second clamping sheet (53) formed by bending downward along the left and right ends of the transverse sheet (51), and a third clamping sheet (54) and a fourth clamping sheet (55) formed by bending downward along the front and rear sides of the transverse sheet (51). The lower ends of the first clamping sheet (52) and the second clamping sheet (53) are respectively clamped and positioned on the outer side surfaces of the first magnetic ring body (21) and the second magnetic ring body (22). The third clamping sheet (54) and the fourth clamping sheet (55) are respectively clamped on the front and rear sides of the gap (20) contacted by the upper ends of the first magnetic ring body (21) and the second magnetic ring body (22), and partially cover the front and rear sides of the gap (20).

7. The inductor filter for convenient coil connection pins according to claim 6, characterized in that: The first clamping piece (52) and the second clamping piece (53) are also respectively embedded in the left limiting groove (15) and the right limiting groove (16).

8. The inductor filter for convenient coil connection pins according to claim 6, characterized in that: The first clamping piece (52) is also bonded to the outer side surface of the first magnetic ring body (21) by glue; and the second clamping piece (53) is also bonded to the outer side surface of the second magnetic ring body (22) by glue.

9. The inductor filter for convenient coil connection pins according to claim 6, characterized in that: The inner side surfaces of the upper and lower ends of the first magnetic ring body (21) are both planes, and the inner side surfaces of the upper and lower ends of the second magnetic ring body (22) are both planes. The inner side surfaces of the upper and lower ends of the first magnetic ring body (21) are in plane contact with the inner side surfaces of the upper and lower ends of the second magnetic ring body (22). Alternatively, the inner side surfaces of the upper and lower ends of the first magnetic ring body (21) are provided with first grooves (222), and the inner side surfaces of the upper and lower ends of the second magnetic ring body (22) are provided with first protrusions (221). After the inner side surface is butted against the inner side surfaces of the upper and lower ends of the second magnetic ring body (22), the first protrusion (221) is butted against the first groove (222) to hold it in place, or, the inner side surfaces of the upper and lower ends of the second magnetic ring body (22) are provided with a first groove, and the inner side surfaces of the upper and lower ends of the first magnetic ring body (21) are provided with a first protrusion, and after the inner side surfaces of the upper and lower ends of the second magnetic ring body (22) are butted against the inner side surfaces of the upper and lower ends of the first magnetic ring body (21), the first protrusion is butted against the first groove to hold it in place.

10. The inductor filter for convenient coil connection pins according to claim 6, characterized in that: A sub-cover plate (17) for separating the first winding portion (11) and the second winding portion (12) is also formed in the middle of the base (1); the sub-cover plate (17) is placed between the first winding portion (11) and the second winding portion (12); the lower end surface of the sub-cover plate (17) is flush with the lower end surfaces of the first cushion block (101), the second cushion block (102), the third cushion block (103), and the fourth cushion block (104).

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