CN221507940U

CN221507940U - Combined inductor

Info

Publication number: CN221507940U
Application number: CN202322672368.XU
Authority: CN
Inventors: 张红君
Original assignee: Northern Hemisphere Technology Suzhou Co ltd
Current assignee: Northern Hemisphere Technology Suzhou Co ltd
Priority date: 2023-10-07
Filing date: 2023-10-07
Publication date: 2024-08-09
Anticipated expiration: 2033-10-07

Abstract

The utility model provides a combined inductor, which comprises at least one pair of inductors; the inductor is provided with a bottom surface, a top surface and side surfaces; each pair of inductor bottom surfaces are oppositely arranged; the inductor comprises a body, a coil and an electrode; the coil is arranged in the body; the body comprises a first molding part and a second molding part; the first molding part density is greater than the second molding part; one end of the electrode is welded with the coil, and the other end extends out of the body and is bent to be attached to the surface of the body; the coil is biased toward the bottom surface of the inductor as viewed in a direction perpendicular to the side surface of the body. The utility model improves the thickness of soft magnetic materials on the opposite sides of two adjacent inductors on the premise of not changing the size of the inductors and the coil outlet positions, thereby improving the electromagnetic shielding level on the opposite sides.

Description

Combined inductor

Technical Field

The utility model relates to the technical field of electronic components, in particular to a combined inductor.

Background

The inductor is taken as a basic passive electronic component, is widely applied to various circuits, can be used for filtering, energy storage, resonance and the like, and is characterized in that the integrated inductor meets the requirement of modern electronic equipment on the inductor due to the excellent space efficiency, electrical performance, anti-interference performance and the like. In the existing circuit layout, two inductors are often required to be combined for use, magnetic leakage on adjacent surfaces of the two inductors are mutually counteracted, and magnetic leakage on opposite surfaces cannot be avoided and electromagnetic interference is easily received. And because the distance between the two inductors is close, the distance between the electrodes of the two inductors is not too small, so that the coil cannot be moved to increase the thickness of the soft magnetic material on the opposite side, thereby improving the electromagnetic shielding level on the opposite side.

Disclosure of utility model

The utility model provides a combined inductor, which improves the thickness of soft magnetic materials on the opposite sides of two adjacent inductors on the premise of not changing the size of the inductor and the coil outlet position, thereby improving the electromagnetic shielding level on the opposite sides.

The utility model provides a combined inductor, which comprises at least one pair of inductors; the inductor is provided with a bottom surface, a top surface and side surfaces; each pair of inductor bottom surfaces are oppositely arranged; the inductor comprises a body, a coil and an electrode; the coil is arranged in the body; the body comprises a first molding part and a second molding part; the first molding part density is greater than the second molding part; one end of the electrode is welded with the coil, and the other end extends out of the body and is bent to be attached to the surface of the body; the coil is biased toward the bottom surface of the inductor as viewed in a direction perpendicular to the side surface of the body.

Further is: the first molding part forms the bottom surface of the inductor, and the second molding part forms the top surface of the inductor; the first molding part comprises a bottom wall, a middle column and a first side wall, wherein the middle column and the first side wall are formed on the bottom wall; welding spots are formed at the welding positions of the coils and the electrodes, and the first side wall of the first forming part is configured to support the welding spots.

Further is: the first molding part is formed by magnetic powder in a cold press mode; the first side wall of the first molding part is lower than the middle column and higher than the bottom wall.

Further is: the first forming part forms the top surface of the inductor; the second molding part forms the bottom surface of the inductor; the first molding portion includes a bottom wall and a center pillar.

Further is: the coil comprises a winding part and wire outlet parts at the head end and the tail end; the winding part is sleeved on the middle column of the first forming part; the wire outlet part extends along the direction far away from the wire winding part and is welded with the two electrodes respectively.

Further is: each pair of inductor side surfaces are bonded with a connecting sheet; glue mixed with magnetic powder is arranged between each pair of inductor bottom surfaces.

Further is: the electrode comprises a connecting part and a bending part which are sequentially arranged; the connecting portion is basically attached to the side face of the inductor, and the bending portion is basically attached to the top face of the inductor.

Further is: the extending direction of the wire outlet part is parallel to the top surface of the inductor and perpendicular to a group of side surfaces.

The beneficial effects of the utility model are as follows: on the premise of not changing the size of the inductor and the coil outgoing position, the thickness of soft magnetic materials on the opposite sides of two adjacent inductors is increased, so that the electromagnetic shielding level on the opposite sides is improved, and the magnetic leakage of the combined inductor and the electromagnetic interference in a circuit are reduced.

Drawings

FIG. 1 is a schematic diagram of a combined inductor;

FIG. 2 is a schematic cross-sectional view of a combined inductor according to a first embodiment;

FIG. 3 is a schematic cross-sectional view of a coil and an electrode;

FIG. 4 is a schematic view of a first molding part according to the first embodiment;

FIG. 5 is a schematic view of a first molding part according to a second embodiment;

FIG. 6 is a schematic view of a first molding part according to a third embodiment;

FIG. 7 is a schematic cross-sectional view of a combined inductor according to a fourth embodiment;

Marked in the figure as: 100. a body; 110. a first molding part; 111. a bottom wall; 112. a center column; 113. a first sidewall; 120. a second molding part; 130. a coil; 131. a winding part; 132. a wire outlet part; 133. welding spots; 140. an electrode; 141. a connection part; 142. a bending part; 200. and a connecting sheet.

Detailed Description

For the purpose of promoting an understanding of the utility model, reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The use of the terms "first," "second," and the like herein do not denote any order or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items. The present utility model will be described in further detail with reference to the drawings and examples, which are only for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Example 1

Referring to fig. 1 to 4, the present application provides a combined inductor, which includes a pair of inductors disposed opposite to each other; each pair of inductor sides is bonded to a bonding pad 200; glue mixed with magnetic powder is arranged between each pair of inductor bottom surfaces. The inductor is provided with a bottom surface, a top surface and side surfaces; the bottom surfaces of the two inductors are oppositely arranged; the inductor comprises a body 100, a coil 130 and an electrode 140; the coil 130 is disposed within the body 100; the body 100 includes a first molding part 110 and a second molding part 120; the first molding part 110 has a density greater than that of the second molding part 120; one end of the electrode 140 is welded with the coil 130, and the other end extends out of the body 100 and is bent to be attached to the surface of the body 100; the coil 130 is biased toward the bottom surface of the inductor, i.e., the distance between the coil 130 and the bottom surface of the inductor is smaller than the distance between the coil 130 and the top surface of the inductor, as viewed in a direction perpendicular to the side surfaces of the inductor, so that the top surface of the inductor has a better shielding effect.

In practical use, the electrodes 140 of the inductors are soldered to the circuit board by solder, so that the distance between the electrodes 140 of two adjacent inductors should not be too small to reduce the risk of short circuit between the electrodes 140 of the adjacent inductors, and the coil 130 is ensured to deviate to the bottom surface of the inductor by adopting a winding mode of medium-high-level outgoing lines, and the position of the outgoing line part 131, namely the position of the electrodes, is basically unchanged. In this embodiment, the first molding portion 110 forms a bottom surface of the inductor, and the second molding portion 120 forms a top surface of the inductor; the first molding part 110 includes a bottom wall 111 and a center pillar 112 and a first side wall 113 formed on the bottom wall 111; the welding points are formed at the welding positions of the coil 130 and the electrode 140, and the first side wall 113 of the first molding part 110 is configured to support the welding points and the wire outlet part 132 of the coil 130, so that deformation or fracture of the wire outlet part 132 and the welding points during molding can be avoided.

The first molding part 110 is formed by cold press molding of magnetic powder in the present embodiment; the first sidewall 113 of the first molding part 110 has a height lower than the height of the center pillar 112 and higher than the height of the bottom wall 111. The first molding portion 110 in this embodiment further includes a second sidewall disposed opposite to the first sidewall 113, so as to improve the overall mass distribution of the inductor.

The coil 130 includes a winding part 131 and a wire outlet part 132 at the head and tail ends; the winding part 131 is sleeved on the middle column 112 of the first forming part 110; since the bottom surfaces of the two inductors are adjacently arranged, the electrodes 140 of the inductors can only be led out from the same side surface, i.e. the wire outlet directions of the two wire outlet portions 132 are the same, in this embodiment, the wire outlet portions 132 extend along the direction away from the wire winding portion 131 and then are welded with the two electrodes 140, and the extending direction of the wire outlet portions 132 is parallel to the top surface of the inductors and perpendicular to a group of side surfaces.

On the basis of the above, the electrode 140 includes a connecting portion 141 and a bending portion 142 which are sequentially provided; the connecting portion 141 is substantially attached to a side surface of the inductor, and the bending portion 142 is substantially attached to a top surface of the inductor.

Example two

Referring to fig. 5, the difference between the present embodiment and the first embodiment is that the first forming portion 110 further has a third sidewall and a fourth sidewall; the first side wall, the second side wall, the third side wall and the fourth side wall extend along the edges of the bottom wall respectively and enclose a square accommodating cavity for accommodating the coil.

Example III

Referring to fig. 6, the difference between the present embodiment and the second embodiment is that the accommodating cavity surrounded by the plurality of side walls is circular, and the first molding portion has a larger volume, so that the inductance characteristic can be further improved.

Example IV

Referring to fig. 7, the difference between the present embodiment and the first embodiment is that: the first molding part 110 forms the top surface of the inductor; the second molding part 120 forms the bottom surface of the inductor, the first molding part 110 includes a bottom wall 111 and a middle pillar 112, and the thickness of the bottom wall 111 is greater than the thickness of the soft magnetic material between the coil 130 and the top surface of the inductor, i.e. the coil 130 is biased toward the bottom surface of the inductor. The coil 130 adopts a winding mode of low-level outgoing lines, the outgoing line part 131 and welding points are supported by the bottom wall 111 of the first forming part 110, and the positions of the first forming part 110 and the second forming part 120 are exchanged, and then the electrode is reversely bent (the electrode 140 is bent towards the first forming part 110 after extending out of the body 110), so that the distance between the coil 130 and the top surface of the inductor is increased, and the electromagnetic shielding level of the top surface of the inductor is enhanced.

The above description is only of the preferred embodiments of the present application, and is not intended to limit the present application in any way, although the present application has been described in the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art will not depart from the scope of the present application, while the above disclosure is directed to various equivalent embodiments, which are capable of being modified or varied in several ways, any simple modification, equivalent changes and variation of the above embodiments according to the technical principles of the present application will still fall within the scope of the technical aspects of the present application.

Claims

1. A combined inductor comprising at least one pair of inductors; the inductor is provided with a bottom surface, a top surface and side surfaces; each pair of inductor bottom surfaces are oppositely arranged; the method is characterized in that: the inductor comprises a body, a coil and an electrode; the coil is arranged in the body; the body comprises a first molding part and a second molding part; the first molding part density is greater than the second molding part; one end of the electrode is welded with the coil, and the other end extends out of the body and is bent to be attached to the surface of the body; the coil is biased toward the bottom surface of the inductor as viewed in a direction perpendicular to the side surface of the body.

2. A combined inductor according to claim 1, characterized in that: the first molding part forms the bottom surface of the inductor, and the second molding part forms the top surface of the inductor; the first molding part comprises a bottom wall, a middle column and a first side wall, wherein the middle column and the first side wall are formed on the bottom wall; welding spots are formed at the welding positions of the coils and the electrodes, and the first side wall of the first forming part is configured to support the welding spots.

3. A combined inductor according to claim 2, characterized in that: the first molding part is formed by magnetic powder in a cold press mode; the first side wall of the first molding part is lower than the middle column and higher than the bottom wall.

4. A combined inductor according to claim 1, characterized in that: the first forming part forms the top surface of the inductor; the second molding part forms the bottom surface of the inductor; the first molding portion includes a bottom wall and a center pillar.

5. A combined inductor according to claim 2 or 4, characterized in that: the coil comprises a winding part and wire outlet parts at the head end and the tail end; the winding part is sleeved on the middle column of the first forming part; the wire outlet part extends along the direction far away from the wire winding part and is welded with the two electrodes respectively.

6. A combined inductor according to claim 1, characterized in that: each pair of inductor side surfaces are bonded with a connecting sheet; glue mixed with magnetic powder is arranged between each pair of inductor bottom surfaces.

7. A combined inductor according to claim 1, characterized in that: the electrode comprises a connecting part and a bending part which are sequentially arranged; the connecting portion is basically attached to the side face of the inductor, and the bending portion is basically attached to the top face of the inductor.

8. A combined inductor as claimed in claim 5, wherein: the extending direction of the wire outlet part is parallel to the top surface of the inductor and perpendicular to a group of side surfaces.