CN210692316U

CN210692316U - Inductor

Info

Publication number: CN210692316U
Application number: CN201921682837.3U
Authority: CN
Inventors: 张福岩
Original assignee: Lianzhen Electronics Shenzhen Co ltd; Lianzhen Electronics Co Ltd
Current assignee: Lianzhen Electronics Shenzhen Co ltd; Lianzhen Electronics Co Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-06-05
Anticipated expiration: 2029-10-10

Abstract

The utility model relates to an inductor, it contains an dustcoat, an interior magnetic core and a current conducting plate. The housing includes two sidewalls and an opening defined between the bottom of the sidewalls. The inner magnetic core is accommodated in the outer cover. The conducting plate comprises a main body part accommodated in the outer cover and two terminals extending out of the outer cover from the opening, the main body part is sleeved outside the inner magnetic core, the two terminals are used for being connected to a circuit substrate and respectively comprise a first bending part and a second bending part, the first bending part extends from one end of the main body part to the outer side of the outer cover along a transverse direction, the second bending part is integrally bent upwards from the outer end of the first bending part and extends to the inner side of the outer cover along the transverse direction, and therefore the second bending part is located between the bottom of a corresponding side wall and the first bending part.

Description

Inductor

Technical Field

The present invention relates to an inductor, and more particularly, to an inductor for filtering, suppressing noise and/or anti-electromagnetic interference.

Background

Fig. 1 shows a conventional inductor 10, the inductor 10 including a housing 12, a core 14, and a conductive plate 16. The housing 12 is made of a magnetic material such as ferrite and has a receiving space 18 inside. The cover 12 has an opening 20 at one side thereof, and the magnetic core 14 is received in the receiving space 18 of the cover 12. The conductive plate 16 includes a main body 22 with a U-shaped cross section and two terminals 24 bent outward from two ends of the main body 22 in opposite directions, and an arc-shaped bending point 26 is formed between each terminal 24 and the main body 22. The main body 22 is disposed outside the magnetic core 14 and between the cover 12 and the magnetic core 14. Each terminal 24 is formed by a bent portion extending out of the opening 20 of the housing 12 and is partially located in a recess (not numbered) formed in the bottom of the housing 12. The bottom (outer) surfaces of the terminals 24 may be soldered to a circuit substrate (not shown).

In order to facilitate the assembly of the conductive plate 16 inside the housing 12, the bottom of the housing 12 is provided with a chamfer 28 corresponding to the bending point 26 to provide an assembly space. However, the provision of the chamfer 28 is disadvantageous for molding the cover body 12 and also increases the core mold loss at the time of manufacturing. Furthermore, when the terminals 24 of the conductive plate 16 are soldered on the circuit board, since the thickness of the material sheet of the conductive plate 16 is generally only 0.2-0.4mm, the amount of solder creep on the solder bump that can be soldered on the terminals 24 is small, which is not conducive to the manufacturer to visually observe the soldering condition of the inductor 10 and the circuit board, i.e., the manufacturer cannot confirm whether the terminals 24 are in contact with the solder of the circuit board, and the quality and reliability of the soldered product cannot be ensured. Further, if a failure occurs in the soldering between the terminal 24 and the circuit board, it is also difficult to rework the circuit board.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the utility model is to provide an inductor, its is simple as a result, and the equipment is convenient, can guarantee the product quality after the welding to and improve the product reliability, can also be favorable to the dustcoat shaping, reduce the mould loss, more be favorable to the reprocess.

In order to achieve the above object, the present invention discloses an inductor, which is characterized by comprising:

a housing having a receiving space therein, the housing including two side walls laterally spaced apart and an opening defined between bottoms of the two side walls, the opening communicating with the receiving space;

an inner magnetic core accommodated in the accommodating space of the housing; and

a conductive plate, it includes a body portion that holds in the dustcoat and extends the terminal outside the dustcoat from the opening, the body portion is fitted outside the inner magnetic core and the terminal is connected to a circuit substrate and includes a first kink and a second kink respectively, the first kink extends towards the outside of the dustcoat along the horizontal from one end of the body portion, the second kink upwards buckles integrally from the outer end of the first kink and extends towards the inside of the dustcoat along the horizontal so that the second kink position is between bottom and the first kink of a corresponding sidewall.

The bottom of each side wall of the outer cover is provided with a groove, and the second bending parts of the two terminals are respectively combined in the grooves of the two side walls.

Wherein the conductive plate is made of a metal sheet, and the thickness of the terminal is twice the thickness of the sheet of the conductive plate.

Therefore, the utility model discloses an inductor's terminal can be fixed a position in the dustcoat really to avoid producing skew or bad at welding process, in addition, this inductor's dustcoat bottom need not set up chamfer equipment space, reaches the fashioned effect that is favorable to the dustcoat, and reducible iron core mould loss. Other objects, advantages and features of the present invention will become apparent from the following detailed description of the preferred embodiments thereof, when read in conjunction with the accompanying drawings.

Drawings

FIG. 1: a cross-sectional view of a conventional inductor is shown.

FIG. 2: according to the utility model discloses an inductor's perspective.

FIG. 3: is another perspective view of the inductor of fig. 2.

FIG. 4: is an exploded view of the components of the inductor of figure 2.

FIG. 5: a cross-sectional view taken along line 5-5 of fig. 2.

FIG. 6: the cross-sectional view of the inductor soldered on the circuit substrate of fig. 2 is shown.

Detailed Description

The preferred embodiments of the present invention will now be described, by way of example only and not by way of limitation, with reference to the accompanying drawings, in which:

fig. 2-5 illustrate an inductor 30 according to an embodiment of the present invention, the inductor 30 being used for filtering, suppressing noise and/or resisting electromagnetic interference. The inductor 30 includes an outer housing 32, an inner magnetic core 34, and a conductive plate 36. In the present embodiment, the housing 32 is made of a magnetic material such as ferrite and has a receiving space 38 therein, and the housing 32 includes two side walls 40 laterally separated and an opening 42 defined between bottom portions 41 of the two side walls 40, the opening 42 communicating with the receiving space 38. Furthermore, the bottom 41 of each sidewall 40 is provided with a groove 44.

The inner magnetic core 34 is made of, for example, a square or cylindrical ferrite magnetic material, is accommodated in the accommodation space 38 of the outer cover 32, and has end faces 46 separated in the lateral direction. The end faces 46 of the inner magnetic core 34 are respectively opposite to the two side walls 40 of the outer cover 32 and separated by a gap.

The conductive plate 36 is integrally formed from a metal sheet and includes a main body portion 48 having a U-shaped cross section and two terminals 50 bent outward in opposite directions from both ends of the main body portion 48. The main body portion 48 is sleeved outside the inner magnetic core 34 and located between the outer cover 32 and the inner magnetic core 34, and the two terminals 50 extend out from the opening 42 of the outer cover 32 and are respectively combined in the grooves 44 at the bottom of the two side walls 40. The terminals 50 are for connection to a circuit substrate 51 (see fig. 6). Thus, when the two terminals 50 of the conductive plate 36 are energized, the conductive plate 36 generates a magnetic field, thereby allowing the inductor 30 to store and release energy through electromagnetic induction.

In the present embodiment, each terminal 50 includes a first bending portion 52 and a second bending portion 54. The first bent portion 52 extends from one end of the main body portion 48 along the transverse direction toward the outside of the housing 32 and is partially engaged in the groove 44 of the bottom portion 41 of one of the sidewalls 40 (see fig. 5, the first bent portion 52 is partially exposed out of the groove 44 for being engaged with the circuit substrate 51). The second bent portion 52 is integrally bent upward from the outer end of the first bent portion 52 and extends toward the inner side of the housing 32 along the transverse direction, such that the second bent portion 52 is engaged in the groove 44 of the bottom portion 41 of one of the sidewalls 40 and located between the bottom portion 41 and the first bent portion 52. Furthermore, after the inner core 34 and the conductive plate 36 are received in the outer housing 32, a dielectric packaging material (e.g., epoxy) can be injected into the receiving space 38 to package the inner core 34 and the conductive plate 36 in the outer housing 32.

When the inductor 30 of the present invention is soldered to the circuit board 51, the opening 42 of the outer cover 32 of the inductor 30 faces the circuit board 51 (see fig. 6), and the first and

second bent portions

52, 54 of the two terminals 50 are soldered to the circuit board 51 by solder paste, so that the inductor 30 is firmly bonded to the circuit board 51.

According to the inductor 30 of the present invention, the innovative design of the two terminals 50 provides the following advantages over the conventional inductor:

1. since each terminal 50 further includes the second bent portion 54 bent back upward from the first bent portion 52, the thickness of the terminal 50 is about twice the thickness of the material sheet of the conductive plate 36, and thus the conductive plate 36 can be conveniently assembled inside the housing 32 even if the bottom of the housing 32 is not provided with the assembly space of the chamfer 28 shown in fig. 1 (see fig. 5). Without the need for the chamfer 28, the housing 32 can be advantageously formed and core tooling wear can be reduced, thereby increasing the service life. Furthermore, the second bending portion 54 is completely integrated in the groove 44 (the depth of the groove 44 is slightly smaller than the thickness of the terminal 50, but larger than the groove depth of the bottom of the housing 12 in fig. 1), so that the terminal 50 can be reliably positioned at the bottom 41 of the housing 32, thereby avoiding the occurrence of deviation or defects during the welding process, and further improving the quality and reliability of the product.

2. Since each terminal 50 is provided with the second bending portion 54 folded upwards to make the whole thickness of each terminal 50 about twice the thickness of the material sheet of the conductive plate 36, the amount of the solder bump 56 will be large in the process of soldering the terminal 50 on the circuit substrate 51 (see fig. 6), so that the manufacturer can directly visually observe the soldering condition of the inductor 30 and the circuit substrate 51 for the convenience of appearance inspection.

In the foregoing specification, the invention has been described with respect to only one specific embodiment, and various changes or modifications may be made in the features of the invention. Accordingly, obvious substitutions and modifications will now occur to those skilled in the art and are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. An inductor, comprising:

2. The inductor as claimed in claim 1, wherein a recess is formed at a bottom of each of the sidewalls of the housing, and the second bent portions of the two terminals are respectively engaged with the recesses of the two sidewalls.

3. An inductor as claimed in claim 1 or 2, wherein the conductive plate is formed from a sheet of metal and the thickness of the terminal is twice the thickness of the sheet of conductive plate.