CN215988279U

CN215988279U - Surface-mounted inductor

Info

Publication number: CN215988279U
Application number: CN202122516283.3U
Authority: CN
Inventors: 曹正平; 褚江
Original assignee: Moshang Electronic Technology Jiangsu Co ltd
Current assignee: Moshang Electronic Technology Jiangsu Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-03-08
Anticipated expiration: 2031-10-19

Abstract

The utility model provides a surface-mounted inductor relating to the technical field of inductors, which comprises an inductance coil, a C-shaped magnetic core, an I-shaped magnetic core and an electrode, wherein the C-shaped magnetic core and the I-shaped magnetic core are connected through the inductance coil, the end face of a lead of the inductance coil is used as the electrode, and the electrode is connected with the I-shaped magnetic core. The inductance coil is integrally formed or bent in advance, so that the lead wire avoids an air gap, and the eddy current loss on the lead wire can be reduced; meanwhile, the magnetic core bending mode ensures that the large-wire-diameter flat copper wire cannot directly contact the magnetic core when being bent, so that the magnetic core cannot be damaged in the bending process; the design process is reasonable, and the method is suitable for the serial design and production of the large-current surface-mounted inductor.

Description

Surface-mounted inductor

Technical Field

The present invention relates to, in particular, surface mount inductors.

Background

The current large-current surface-mounted molded power inductor adopts a coil wound in advance and then placed in a mold cavity for mold forming, and the method has the risk of damaging an enameled layer of an enameled wire in the mold forming process to cause short circuit. The traditional large-current surface-mounted combined power inductor generally adopts a mode of bonding C-type and I-type magnetic cores, a flat wire with a thicker wire diameter is directly bent and formed on the C-type magnetic core and then is bonded after covering the I-type magnetic core, the magnetic core is easy to break in the manufacturing process due to direct bending and forming, and the coil is located on the bonding surface of the combined magnetic core to enable eddy current loss under high frequency to be larger.

The patent literature search of the prior art finds that Chinese invention patent publication No. CN209947614U discloses a surface-mounted inductor, belongs to the technical field of inductors, and solves the heat dissipation problem of miniaturized inductors. Including the coil, skeleton subassembly and magnetic core assembly, the skeleton subassembly is formed by connecting two skeleton detachably, two skeletons all are equipped with the perforating hole, wind coil on the outer wall of perforating hole, the magnetic core assembly runs through in the perforating hole, the bottom of skeleton subassembly has set firmly the pin, the pin is including setting firmly the first section of pin on the skeleton subassembly and being used for surface mounting's pin second section, the end of coil sets firmly on the first section of pin, the horizontal top cap with adsorption head matched with is installed at skeleton subassembly top, be equipped with the clearance between the top of horizontal top cap and coil. The utility model enables the wire to avoid the air gap by integral forming or pre-bending, thereby reducing the eddy current loss on the wire. Therefore, the method disclosed in the document and the utility model belong to different inventive concepts.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the present invention aims to provide a surface mount inductor.

The surface-mounted inductor comprises an inductance coil, a C-shaped magnetic core, an I-shaped magnetic core and an electrode, wherein the C-shaped magnetic core is connected with the I-shaped magnetic core through the inductance coil, the end face of a lead of the inductance coil is used as the electrode, and the electrode is connected with the I-shaped magnetic core.

In some embodiments, the inductor coil includes a base portion and a bent portion, two ends of the base portion are respectively connected to the bent portion, and an end face of a lead of the bent portion serves as an electrode.

In some embodiments, the inductor coil is in a zig-zag shape.

In some embodiments, the bending portion and the electrode are clamped to the i-shaped magnetic core.

In some embodiments, a first groove is formed in the C-shaped magnetic core, and the base is clamped in the first groove.

In some embodiments, a second groove is formed in the i-shaped magnetic core, and the bent portion is clamped in the second groove.

In some embodiments, the i-shaped magnetic core further comprises a first magnetic core block, a second magnetic core block and a third magnetic core block, and the first magnetic core block and the second magnetic core block are connected through the third magnetic core block.

In some embodiments, the junction of the first magnetic core block and the third magnetic core block and the junction of the second magnetic core block and the third magnetic core block are chamfered.

In some embodiments, the third magnetic core block is vertically coupled to an intermediate position of the first and second magnetic core blocks.

In some embodiments, the bent portion passes through the second groove and is clamped on the third magnetic core block.

Compared with the prior art, the utility model has the following beneficial effects:

the inductance coil is integrally formed or bent in advance, so that the lead wire avoids an air gap, and the eddy current loss on the lead wire can be reduced; meanwhile, the magnetic core bending mode ensures that the large-wire-diameter flat copper wire cannot directly contact the magnetic core when being bent, so that the magnetic core cannot be damaged in the bending process; the design process is reasonable, and the method is suitable for the serial design and production of the large-current surface-mounted inductor.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is an exploded view of the finished product of the present invention;

FIG. 2 is a schematic view of a C-core of the present invention;

FIG. 3 is a schematic view of an I-shaped core of the present invention;

FIG. 4 is a schematic diagram illustrating the area definition of an inductor according to the present invention;

FIG. 5 is a schematic diagram of an inductor coil attached to an I-shaped core according to the present invention;

fig. 6 is a schematic view of the finished assembly of the present invention.

Reference numbers in the figures:

the magnetic core comprises an inductance coil-1, a base-11, a bent part-12, a C-shaped magnetic core-2, a first groove-21, an I-shaped magnetic core-3, a second groove-31, a first magnetic core block-32, a second magnetic core block-33, a third magnetic core block-34 and an electrode-4.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.

Example 1

The utility model provides a surface-mounted inductor which comprises an inductance coil 1, a C-shaped magnetic core 2, an I-shaped magnetic core 3 and an electrode 4, wherein the C-shaped magnetic core 2 and the I-shaped magnetic core 3 are connected through the inductance coil 1, the electrode 4 is arranged on the end face of a lead of the inductance coil 1, and the electrode 4 is attached to the outer surface of the I-shaped magnetic core 3. Preferably, the C-shaped core 2 and the i-shaped core 3 are both formed by pressing magnetic powder and resin.

The inductance coil 1 comprises a base 11 and a bending part 12, the two ends of the base 11 are respectively connected with the bending part 12, the bending part 12 is connected with the I-shaped magnetic core 3 in a clamping mode, and the end face of a lead of the bending part 12 is used as an electrode 4. Preferably, the inductance coil 1 is a concave shape, and a large-diameter flat wire of an external electrode is bent in advance or formed integrally. The base 11 is clamped in the first groove 21 on the C-shaped magnetic core 2, the bending portion 12 is clamped in the second groove 31 on the i-shaped magnetic core 3, and the electrode 4 at the bottom of the bending portion 12 passes through the second groove 31 and is clamped on the third magnetic core block 34.

More specifically, the first groove 21 provides a receiving space for the base 11 on the inductor coil 1 after being bent or integrally formed in advance, so that the copper wire can avoid the air gap position to reduce the eddy current loss. The bottom I-shaped magnetic core 3 is provided with a second groove 31, the second groove 31 is a groove for the wires at two sides and the external electrode at the bottom, so that the inductance coil 1 with the bent magnetic core can be sleeved and fixed in the groove. The inductance coil 1 is made of a large-wire-diameter flat wire which is bent in advance or is integrally formed with an external electrode, and the large-wire-diameter flat wire is clamped into the second grooves 31 on the two sides of the I-shaped magnetic core 3, so that the inductance coil 1 is bent and then integrated with the bottom I-shaped magnetic core 3, and a copper wire in the inductance coil 1 is tightly matched with the top surface of the I-shaped magnetic core 3. The close fit of the copper wires reduces eddy current losses on the inductor 1 due to edge effects at high frequency conditions. And finally, adhering the bent or integrally formed whole body and the top C-shaped magnetic core to complete actual assembly.

Example 2

In this embodiment 2, the i-shaped magnetic core 3 is further described on the basis of embodiment 1, so that the second grooves 31 on both sides of the i-shaped magnetic core are consistent in structure, and the bent portion 12 can be clamped better, thereby ensuring structural firmness. Specifically, the method comprises the following steps:

the i-shaped magnetic core 3 further comprises a first magnetic core block 32, a second magnetic core block 33 and a third magnetic core block 34, wherein the first magnetic core block 32 and the second magnetic core block 33 are connected through the third magnetic core block 34. The junction of the first and third

magnetic core blocks

32 and 34 and the junction of the second and third

magnetic core blocks

33 and 34 are chamfered. Preferably, the first and second

magnetic core blocks

32 and 33 are arranged in parallel, and the third magnetic core block 34 is vertically coupled to an intermediate position of the first and second

magnetic core blocks

32 and 33.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. The utility model provides a surface mounting inductor which characterized in that, includes inductance coils (1), C type magnetic core (2), I shape magnetic core (3) and electrode (4), C type magnetic core (2) with I shape magnetic core (3) pass through inductance coils (1) are connected, inductance coils (1) wire terminal surface is done electrode (4), electrode (4) are connected I shape magnetic core (3).

2. The surface mount inductor according to claim 1, wherein the inductor coil (1) comprises a base (11) and a bending part (12), two ends of the base (11) are respectively connected to the bending part (12), and the end surface of the wire of the bending part (12) is used as the electrode (4).

3. Surface mount inductor according to claim 2, characterized in that the inductor winding (1) is in the shape of a Chinese character 'ao'.

4. The surface-mount inductor as claimed in claim 3, wherein the bent portion (12) and the electrode (4) are engaged with the I-shaped core (3).

5. The surface mount inductor as claimed in claim 4, wherein the C-shaped core (2) has a first recess (21), and the base (11) is engaged with the first recess (21).

6. The surface-mount inductor as claimed in claim 5, wherein the I-shaped core (3) has a second groove (31), and the bent portion (12) is engaged with the second groove (31).

7. The surface-mount inductor according to claim 6, wherein the I-shaped magnetic core (3) further comprises a first magnetic core block (32), a second magnetic core block (33), and a third magnetic core block (34), and the first magnetic core block (32) and the second magnetic core block (33) are connected through the third magnetic core block (34).

8. The surface-mount inductor according to claim 7, wherein a junction of the first magnetic core block (32) and the third magnetic core block (34) and a junction of the second magnetic core block (33) and the third magnetic core block (34) are chamfered.

9. The surface mount inductor according to claim 8, wherein the third magnetic core block (34) is vertically connected to a middle position of the first and second magnetic core blocks (32, 33).

10. The surface mount inductor according to claim 9, wherein the bent portion (12) is inserted into the second groove (31) and is snapped onto the third magnetic core block (34).