TWM545348U - Inductor - Google Patents

Description

inductance

This creation relates to an inductor, and more particularly to an inductor that is suitable for bonding to a circuit board by surface mount technology (SMT).

As the demand for miniaturization of electronic devices is increasing, the inductance also needs to be developed toward miniaturized components, and at the same time, the packaging technology required for the inductor to be mounted on the circuit board is higher. The packaging technology for inductors is generally divided into dual in-line package (DIP) and surface mount technology (SMT), in which SMT package technology is suitable for mass production, reducing the needs of operators, and reducing the required area and number of layers of the board. Etc.

The surface-adhesive type of inductor generally includes a magnetic core, a coil wound around the magnetic core, and a two-electrode piece bonded to the bottom of the magnetic core for fixing to a circuit board. Although the structure of the conventional inductor has been partially implemented, the conventional inductor still has troublesome and time-consuming problems in assembly, and the cost cannot be effectively reduced. In particular, magnetic cores of conventional inductors are generally composed of two separate core elements that are cumbersome and time consuming to assemble.

Accordingly, the purpose of the present invention is to provide an inductor that is suitable for being bonded to a circuit board by surface mount technology (SMT), and that has an effect of facilitating assembly and reducing the thickness of the inductor.

The inductor of the present invention comprises a magnetic core, a coil, a magnetic core, a first electrode sheet and a second electrode sheet. The magnetic core includes a first end and a second end which are laterally separated, and a front end surface and a rear end surface which are longitudinally separated. The magnetic core is provided with a recess extending from the front end surface through the rear end surface by the first end One end extends toward the second end but is separated from the second end, the magnetic core has upper and lower magnetic core portions separated by the concave portion, and the upper and lower magnetic core portions have a first end at the magnetic core A gap. The coil includes a winding portion and first and second electrode pins extending from both ends of the winding portion, the winding portion is sleeved in one of the upper and lower magnetic core portions, and the first electrode is connected A foot is located outside the recess and extends along the lateral direction toward the first end, the second electrode pin being located outside the recess and extending along the lateral direction toward the second end. The first electrode sheet is coupled to the first end of the magnetic core to connect the first electrode pin. The second electrode sheet is coupled to the second end of the magnetic core to connect the second electrode pin.

In one embodiment, the winding portion is sleeved around the outer periphery of the lower core portion, the first electrode pin is adjacent to the rear end surface of the magnetic core, and the second electrode pin is adjacent to the front end surface of the magnetic core. The first electrode sheet includes a first bottom portion and a first connecting portion extending upward from one end of the first bottom portion, the first bottom portion being coupled to a bottom surface of the lower magnetic core portion, the first connecting portion contacting or adjacent to the rear portion The second electrode sheet includes a second bottom portion and a second connecting portion extending upward from one end of the second bottom portion, the second bottom portion being coupled to the bottom surface of the lower magnetic core portion, The second connecting portion contacts or is adjacent to the front end surface to connect the second electrode pin.

Preferably, the bottom surface of the lower core portion is provided with a recess between the first end and the second end, and the upper portion and the lower portion of the winding portion are respectively received in the recess and the recess. Furthermore, a bottom surface of the upper core portion or a top surface of the lower core portion may be provided with a spacer to adjust the width of the gap.

Other objects, advantages and features of the present invention will be apparent from the following description of the preferred embodiments illustrated herein.

The preferred embodiment of the present invention will now be described by way of example only and not by way of limitation,

1 to 4 show an inductor 10 according to an embodiment of the present invention. The inductor 10 includes a magnetic core 12, a coil 14 wound around the magnetic core 12, a first electrode sheet 16, and a second electrode sheet 18. The magnetic core 12 is made of a magnetic material such as ferrite and includes a first end 20 and a second end 22 spaced apart laterally and a front end face 24 and a rear end face 26 spaced apart in a longitudinal direction, the longitudinal direction being perpendicular to the transverse direction . The magnetic core 12 is provided with a recess 28 extending from the front end surface 24 through the rear end surface 26 and extending from the first end 20 toward the second end 22 but spaced apart from the second end 22 such that the magnetic core 12 has The upper and lower core portions 30, 32 separated by the recess 28 have a gap 34 between the upper and lower core portions 30, 32 at the first end 20 of the core 12 to constitute an electromagnetic circuit. In the present embodiment, the lateral cross sections of the upper and lower core portions 30 and 32 are each rectangular, but are not limited thereto. The bottom surface 35 of the lower core portion 32 is provided with a recess 36 which is located between the first end 20 and the second end 22.

The coil 14 includes a winding portion 38 and first and second electrode pins 40, 42 extending from opposite ends of the winding portion 38. The winding portion 38 has a through hole 44 for receiving a magnetic hole therein. In the present embodiment, the winding portion 38 is sleeved around the outer periphery of the lower core portion 32 and the upper portion 46 and the lower portion 48 of the winding portion 38 are respectively received in the recess portion 28 and the recess 36 ( Referring to Fig. 3), in the present embodiment, the recess 28 has a width greater than the gap 34 in the portion in which the upper portion 46 is provided. The first electrode pin 40 is located outside the recess 28 and extends along the lateral direction toward the first end 20 . The second electrode pin 42 is located outside the recess 28 and extends along the lateral direction toward the second end 22 . In this embodiment, the first electrode pin 40 is adjacent to the rear end surface 26, and the second electrode pin 42 is adjacent to the front end surface 24.

The first electrode sheet 16 and the second electrode sheet 18 are respectively coupled to the first end 20 and the second end 22 of the magnetic core 12 for providing a corresponding combination of the first and second electrode pins 40, 42. In the embodiment, the first electrode sheet 16 includes a first bottom portion 50 and a first connecting portion 52 extending upward from one end of the first bottom portion 50. The first bottom portion 50 is coupled to the lower core portion 32. The bottom surface 35, the first connecting portion 52 is in contact with or adjacent to the rear end surface 26 for providing the first electrode pin 40 to be combined. The second electrode sheet 18 includes a second bottom portion 54 and a second connecting portion 56 extending upward from one end of the second bottom portion 54. The second bottom portion 54 is coupled to the bottom surface 35 of the lower core portion 32. The joint portion 56 contacts or is adjacent to the front end face 24 for providing a second electrode pin 42 joint. In the embodiment, the upper ends of the first and second connecting portions 52, 56 respectively extend a bent portion 58, 60 for providing the first and second electrode pins 40, 42 to be combined.

According to the present invention, the inductor 10 is configured to be directly attached to a circuit board (not shown) by the first and second electrode sheets 16, 18, so that the inductor 10 is suitable for surface adhesion. Technology (SMT) is integrated on the board. Furthermore, the upper and lower core portions 30 and 32 of the present invention integrally constitute the magnetic core 12, so that there is no connection problem between the upper and lower core portions 30 and 32, and the inductance can be reduced. 10 overall thickness dimensions. Furthermore, the winding portion 38 of the coil 14 can be directly fitted around the outer periphery of the lower core portion 32 via the recess portion 28, and the first and second electrode pins 40, 42 of the coil 14 and the first Correspondingly connected to the second electrode sheets 16, 18, in particular, has the advantages of convenient assembly and time saving. In addition, the width of the gap 34 between the upper and lower core portions 30, 32 can be adjusted according to the magnitude of the inductance to adjust the air gap value of the inductor 10, in particular, in the gap 34. The bottom surface of the core portion 30 (see FIG. 5) or the top surface of the lower core portion 32 is provided with spacers 62 having different magnetic permeability for adjusting the width of the gap 34 to adjust the inductance value.

6 to 8 show an inductor 10 according to another embodiment of the present invention. In this embodiment, the first and second electrode pins 40, 42 are respectively coupled to the upper ends of the first and second connecting portions 52, 56. The outer surface, that is, the upper ends of the first and second joint portions 52, 56 are not respectively extended by the bent portions to provide the first and second electrode pins 40, 42 to be combined.

In the foregoing specification, the present invention has been described in terms of a particular embodiment, and many variations or modifications can be made in the present invention. Therefore, obvious substitutions and modifications to those skilled in the art will still be incorporated in the scope of the patent claimed herein.

10‧‧‧Inductance
12‧‧‧ magnetic core

14‧‧‧ coil
16‧‧‧First electrode sheet

18‧‧‧Second electrode
20‧‧‧ first end

22‧‧‧ second end
24‧‧‧ front end

26‧‧‧ rear end face
28‧‧‧ recess

30‧‧‧Upper core
32‧‧‧low core

34‧‧‧ gap
35‧‧‧ bottom

36‧‧‧ Groove
38‧‧‧ Winding Department

40‧‧‧First electrode pin
42‧‧‧Second electrode pin

44‧‧‧through hole
46‧‧‧ upper

48‧‧‧ lower
50‧‧‧ first bottom

52‧‧‧First Link
54‧‧‧ second bottom

56‧‧‧Second Link
58‧‧‧Bends

60‧‧‧Bends
62‧‧‧shims

1 is a perspective view of an inductor in accordance with an embodiment of the present invention.

2 is an exploded view of the inductance of FIG. 1.

Figure 3 is a cross-sectional view taken along line 3-3 of Figure 1.

Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3.

Fig. 5 is a cross-sectional view similar to Fig. 3 showing a spacer provided on the bottom surface of the upper core portion.

Figure 6 is a perspective view of an inductor in accordance with another embodiment of the present invention.

Figure 7 is an exploded view of the inductor of Figure 6.

Figure 8 shows a top view of the inductor of Figure 6.

10‧‧‧Inductance

12‧‧‧ magnetic core

14‧‧‧ coil

16‧‧‧First electrode sheet

18‧‧‧Second electrode

20‧‧‧ first end

22‧‧‧ second end

24‧‧‧ front end

26‧‧‧ rear end face

30‧‧‧Upper core

32‧‧‧low core

34‧‧‧ gap

36‧‧‧ Groove

38‧‧‧ Winding Department

40‧‧‧First electrode pin

42‧‧‧Second electrode pin

52‧‧‧First Link

56‧‧‧Second Link

Claims (7)

An inductor comprising: a magnetic core comprising a first end and a second end spaced apart laterally and a front end face and a rear end face spaced apart in a longitudinal direction, the magnetic core being provided with a recess extending from the front end face And extending from the first end to the second end but spaced apart from the second end, the magnetic core has upper and lower magnetic core portions separated by the concave portion, between the upper and lower magnetic core portions The first end of the magnetic core has a gap; a coil includes a winding portion and first and second electrode pins extending from both ends of the winding portion, the winding portion is sleeved on the upper and lower sides One of the magnetic core portions, the first electrode pin is located outside the recess and extends along the lateral direction toward the first end, the second electrode pin is located outside the recess and along the lateral direction toward the second end Extending; a first electrode sheet coupled to the first end of the magnetic core to connect the first electrode pin; and a second electrode sheet coupled to the second end of the magnetic core to connect the second electrode Pin. According to the invention of claim 1, wherein the winding portion is sleeved around the outer periphery of the lower core portion, the first electrode pin is adjacent to the rear end surface of the magnetic core, and the second electrode pin is adjacent to the magnetic core Front end face. According to the invention of claim 2, the first electrode sheet includes a first bottom portion and a first connecting portion extending upward from one end of the first bottom portion, the first bottom portion being coupled to the bottom surface of the lower magnetic core portion The first connecting portion contacts or is adjacent to the rear end surface to connect the first electrode pin, and the second electrode piece includes a second bottom portion and a second connecting portion extending upward from one end of the second bottom portion, the second bottom portion Combined with the bottom surface of the lower core portion, the second connecting portion contacts or is adjacent to the front end surface to connect the second electrode pin. According to the invention of claim 1, wherein the bottom surface of the lower core portion is provided with a groove, the groove is located between the first end and the second end, and the upper portion and the lower portion of the winding portion respectively accommodate In the recess and the recess. The inductor according to claim 1, wherein the bottom surface of the upper core portion or the top surface of the lower core portion is provided with a spacer to adjust the width of the gap. According to the invention of claim 3, the upper ends of the first and second connecting portions respectively extend a bent portion for providing the first and second electrode pins. The inductor of claim 3, wherein the first and second electrode pins are respectively coupled to the outer surfaces of the upper ends of the first and second joints.