TWI590270B - Inductor - Google Patents

Description

Inductor

This creation is about an inductor.

1 and 2 show a conventional inductor 10 including an H-shaped magnetic core substrate 12, a metal coil 14 bonded to the magnetic core substrate 12, and a cover over the upper end of the magnetic core substrate 12. A core cover body 16. The core base 12 includes an intermediate portion 18 and two flange portions 20 on opposite sides of the intermediate portion 18. The top end of the intermediate portion 18 is provided with an upper recess 22 and the side ends of the intermediate portion 18 are individually provided with one side. The groove 24 is in communication with the upper groove 22 and the width of each side groove 24 is slightly larger than the upper groove 22. The coil 14 has a U-shaped cross section and the surface may be covered with an insulating film. The coil 14 includes a lateral portion 26 and two legs 27 extending downward from opposite ends of the lateral portion 26, the lateral portion 26 and the second portion The leg portions 27 are individually assembled in the upper recess 22 and the side recess 24 of the magnetic core base 12, and the two leg portions 27 are individually bent inwardly by an electrode pin 28, and the two electrode pins 28 are coupled to the magnetic core The bottom surface of the base 12 is for connection to a circuit board. The core cover 16 can be bonded to the top surface of the two flange portions 20 by an adhesive 29 such that an air gap is formed between the top surface of the core base 12 and the core cover 16 to provide a sense of presetness. Values and characteristics.

If the bonding effect between the coil 14 and the core base 12 is not good, the inductor 10 will generate noise during operation, and thus, the coupling between the coil 14 and the core base 12 can be made. Indeed, it is not only necessary to use a lot of glue at the abutment of the coil 14 and the core base 12, and it is necessary to apply force by the device to firmly bond the two. However, the force exerted by the device can cause a large amount of glue to overflow outward during the bonding process, thereby adversely affecting the size requirements of the inductor 10. In addition, in the process of assembling the coil 14 to the core base 12, at least one leg portion 27 of the coil 14 must be folded outward to assemble the coil 14 to the groove 22 above the core base 12. After the inner side of the side recess 24, the outwardly folded leg portion 27 is folded inwardly so that the electrode pin 28 is bonded to the bottom surface of the core base 12, which makes the assembly process more troublesome.

Accordingly, it is an object of the present invention to provide an inductor whose structural design advantageously uses more adhesive to firmly bond the coil to the magnetic core substrate to prevent the inductor from generating noise during operation and at the same time Effectively avoiding the glue spilling out during the bonding process to fully meet the inductor size requirements; in addition, the structural design of the inductor makes the assembly of the coil and the core matrix easy and convenient.

The inductor of the present invention comprises a magnetic core substrate, a coil and a magnetic core cover. The magnetic core base body includes an intermediate portion and two flange portions on opposite sides of the intermediate portion, the top end of the intermediate portion is provided with an upper groove, and the two sides of the intermediate portion are separately provided with one side groove, and the two sides are concave The slot is between the two flange portions. The coil includes a lateral portion and two legs extending downward from opposite ends of the lateral portion, each leg portion is bent outwardly by an electrode pin, and each electrode pin includes a first segment and a second segment. The first segment extends outwardly from the lower end of the corresponding leg, the second segment extends upwardly from the outer end of the first segment, and a recess is formed between each electrode pin and the corresponding leg, the lateral portion of the coil and The two electrode pins are individually located in the upper groove and the side groove of the magnetic core substrate and are bonded by adhesive. The core cover is coupled to the top surface of the flange portion of the core base.

In an embodiment, the extending direction of the first segment of the electrode pin is substantially parallel to the lateral portion, and the extending direction of the second segment is substantially parallel to the leg portion. The recess defined between each electrode pin and the corresponding leg is U-shaped.

Other objects, advantages and features of the present invention will become apparent from

10. Inductor 12. Core base
14. Coil 16. Magnetic core cover
18. Intermediate part 20. Flange part
22. Upper groove 24. Side groove
26. Lateral section 27. Foot
28. Electrode pin 29. Adhesive
30. Inductor 32. Core base
34. Coil 36. Magnetic core cover
38. Middle part 40. Flange part
42. upper groove 44. side groove
46. Lateral section 48. Foot
50. Electrode pin 52. First paragraph
54. Second paragraph 56. Concave
58. Adhesive 60. Adhesive

Figure 1 shows an exploded view of a conventional inductor.
2 is a cross-sectional view of the inductor of FIG. 1.
3 is an exploded view of an inductor in accordance with an embodiment of the present invention.
4 is a perspective view of the inductor of FIG. 3.
Figure 5 is a cross-sectional view taken along line 5-5 of Figure 4.
Figure 6 is a cross-sectional view taken along line 6-6 of Figure 4.

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

3 through 6 illustrate an inductor 30 constructed in accordance with an embodiment of the present invention. The inductor 30 is adapted to be mounted on a circuit board or motherboard for filtering, suppressing noise, or resisting electromagnetic interference. The inductor 30 includes a core base 32, a coil 34 and a core cover 36. The core base 32 is made of a magnetic material and includes an intermediate portion 38 and two flange portions 40 on opposite sides of the intermediate portion 38. The top end of the intermediate portion 38 defines an upper recess 42 and two of the intermediate portion 38. The side ends individually form a side groove 44 that communicates with the upper groove 42 and is located between the two flange portions 40. The width of each side groove 44 is slightly larger than the upper groove 42. In the present embodiment, the length of each side groove 44 in the longitudinal direction of the intermediate portion 38 is greater than the length of each side groove 24 of the conventional inductor 10 shown in FIG.

The coil 34 includes a lateral portion 46 and two legs 48 extending downward from opposite ends of the lateral portion 46. The width of each leg portion 48 is slightly larger than the lateral portion 46, and each leg portion 48 is bent outwardly by an electrode. Pin 50 is used to connect to the electrodes of a circuit board. In this embodiment, each electrode pin 50 has an L-shaped cross section and includes a first segment 52 and a second segment 54 extending outward from the lower end of the corresponding leg portion 48 and extending direction. In substantially parallel with the lateral portion 46, the second segment 54 extends upwardly from the outer end of the first segment 52 and extends in a direction substantially parallel to the leg portion 48 such that each electrode pin 50 and the corresponding leg portion 48 are A U-shaped recess 56 is defined therebetween. The lateral portion 46 of the coil 34 and the two-electrode pin 50 are individually assembled in the upper recess 42 and the side recess 44 of the core base 32.

The core cover 36 may be made of a magnetic material such as ferrite and bonded to the top surface of the two flange portions 40 of the core base 32 by an adhesive 58 such that the top surface of the core base 32 and the core cover An air gap is formed between the bodies 36 to provide predetermined inductive values and features. In one embodiment, the adhesive 58 is formed by mixing, for example, glass beads with a glue (ie, a resin that mixes the glass beads). The size of the glass bead can be used to control the spacing between the top surface of the core substrate 32 and the core cover 36.

The inductor 30 constructed in accordance with the present invention is assembled by first applying a glue to the upper recess 42 of the core base 32 and the side recess 44. Thereafter, the lateral portion 46 of the coil 34 is connected to the second electrode. The foot 50 is individually placed in the upper recess 42 and the side recess 44 of the magnetic core base 32, and then in the abutting portion of the coil 14 and the magnetic core base 12 (including the lateral portion 46 of the coil 34, the foot portion) 48 and the electrode pins 50) are glued with a large amount of glue to bond the two. Finally, the core cover 36 is bonded to the top surface of the two flange portions 40 of the core base 32 by the adhesive 58. Since the electrode pins 50 of the coil 34 of the present invention are designed to extend outwardly from the lower end of the corresponding leg portion 48 and the recess portion 56 is formed between each electrode pin 50 and the corresponding leg portion 48, a large amount of adhesive is formed. (shown by reference numeral 60 in FIG. 5), when it flows out from the adjacent portion of the coil 34 and the core base 32 during the bonding process, it will be carried in the recess 56 without overflowing the inductor 30 and adversely affecting it. The size requirements of the inductor. In addition, in the process of assembling the coil 34 to the core base 32, the electrode pins 50 of the coil 34 are directly received in the side recesses 44 of the core base 32, and the conventional coils as shown in FIG. 1 are not necessary. The foot 27 needs to be folded outward and inward to be bonded to the bottom surface of the core base 12, thereby improving the convenience of assembling the coil 34. Thus, the inductor 30 in accordance with the present invention allows for the use of more adhesive to enhance the bonding between the coil 34 and the core base 32, making the combination of the coil 34 and the core base 32 more robust and convenient.

In the foregoing specification, the invention has been described in terms of a particular embodiment, and various changes or modifications may be Therefore, obvious substitutions and modifications may be made by those skilled in the art, and will still be incorporated in the scope of the claimed invention.

30. Inductor 32. Core base
34. Coil 36. Magnetic core cover
38. Middle part 40. Flange part
42. upper groove 44. side groove
46. Lateral section 48. Foot
50. Electrode pin 52. First paragraph
54. Second paragraph 56. Concave

Claims (5)

An inductor comprising:
a magnetic core substrate comprising an intermediate portion and two flange portions on opposite sides of the intermediate portion, the top end of the intermediate portion is provided with an upper groove and the two sides of the intermediate portion are individually provided with one side groove, the two a side groove is located between the two flange portions;
a coil includes a lateral portion and two legs extending downward from opposite ends of the lateral portion, each leg portion is bent outwardly by an electrode pin, and each electrode pin includes a first segment and a second segment The first segment extends outwardly from the lower end of the corresponding leg, and the second segment extends upward from the outer end of the first segment, forming a recess between each electrode pin and the corresponding leg, the lateral direction of the coil And the two electrode pins are respectively located in the upper groove and the side groove of the magnetic core substrate and are bonded by glue; and a magnetic core cover body is coupled to the top surface of the two flange portions of the magnetic core substrate. The inductor according to claim 1, wherein the extending direction of the first segment of the electrode pin is substantially parallel to the lateral portion, and the extending direction of the second segment is substantially parallel to the leg portion. According to the inductor of the first application of the patent scope, the recess is U-shaped. According to the inductor of claim 1, wherein the width of each side groove is slightly larger than the width of the upper groove, the width of each leg of the coil is slightly larger than the width of the lateral section. The inductor of claim 1, wherein an air gap is formed between the top surface of the magnetic core substrate and the magnetic core cover.