CN211294832U - Inductance - Google Patents

Abstract

The utility model discloses an inductance. The inductor includes: the base is provided with at least two winding through holes; the magnetic core is fixedly arranged on the base, and the at least two winding posts of the installed magnetic core are arranged corresponding to the at least two winding through holes; the at least two coils are correspondingly wound on the at least two winding posts and respectively form a coil; the minimum distance between the central axis of each winding post and the edge of the corresponding winding through hole is larger than one half of the maximum distance between the outer contours of the coils formed on the winding posts. The utility model discloses can realize automatic wire winding and reason line, production efficiency is high, and heat dispersion is good.

Description

Inductance

Technical Field

The utility model relates to an inductance.

Background

With the development of thin, high power density and automation of switching power supplies, how to reduce labor cost, realize automatic production, and have high product efficiency and good heat dissipation is a problem that must be considered by magnetic element design engineers.

At present, because the space between the coil head position and the base is large, and the bottom of the base is provided with the lead groove, the existing flat wire vertical inductor can automatically wind and arrange wires (automatic production can be realized), and has good heat radiation performance. However, the height of the structure is high, and the structure design cannot be adopted under the limited high requirement.

As shown in fig. 1A to 1C, a conventional flat-wire horizontal inductor 100 mainly includes a base 11, a magnetic core 12, and a coil 13, wherein the base 11 has two bases 111 and 112 adapted to the coil 13, a connection pin 113, and wire-arranging spaces 114 and 115, and the two coils 13 are respectively wound on two winding posts 121 and 122 of the magnetic core 12. However, although this structure is suitable for a height-limited design machine, it is necessary to separate the core 12 from the base 11 during winding and wind the coil by placing the core 12 on a winding machine (i.e., machine operation), and after the winding of the core 12 is completed, it is necessary to manually combine the core 12 around the coil with the base 11 by dispensing, and manually wind the start and end wires on the terminal pins for soldering (i.e., manual operation). In other words, the structure cannot be automatically dispensed and arranged, i.e. cannot be fully automated. Further, since the base 11 is large, when the core 12 with the coil 13 is combined with the base 11, the bottom of the coil 13 is covered by the base 11, resulting in poor heat dissipation performance.

Therefore, how to design an inductor which can meet the height requirement, can be automatically produced and has better heat dissipation is a problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inductance can overcome above-mentioned prior art one or more defects.

In order to achieve the above object, the present invention provides an inductor, which comprises: the base is provided with at least two winding through holes; the magnetic core is fixedly arranged on the base, and the at least two winding posts of the installed magnetic core are arranged corresponding to the at least two winding through holes; the at least two coils are correspondingly wound on the at least two winding posts and respectively form a coil; the minimum distance between the central axis of each winding post and the edge of the corresponding winding through hole is larger than one half of the maximum distance between the outer contours of the coils formed on the winding posts.

In an embodiment of the present invention, a connection post is disposed between two adjacent winding through holes.

In an embodiment of the present invention, the base includes a first supporting base and a second supporting base which are oppositely disposed, and the connecting column is connected between the first supporting base and the second supporting base.

In an embodiment of the present invention, a first distance between two ends of the first supporting base is smaller than or equal to a second distance between two ends of the second supporting base.

In an embodiment of the present invention, the base further includes a plurality of connection pins, and the plurality of connection pins include at least two first connection pins disposed on the first support base and at least two second connection pins disposed on the second support base.

In an embodiment of the present invention, the first terminal of each coil is correspondingly mounted on the first connection pin, and the second terminal is correspondingly mounted on the second connection pin; and/or a first pitch between two adjacent first wiring pins is smaller than a second pitch between two adjacent second wiring pins.

In an embodiment of the present invention, the first supporting base has a first supporting surface, and a first protrusion extending upward along an outer edge of the first supporting surface; the second support base is provided with a second support surface and a second protruding part formed by extending upwards along the outer side edge of the second support surface.

In an embodiment of the present invention, the magnetic core further includes a first magnetic end cap and a second magnetic end cap, the first magnetic end cap is connected to the first ends of the at least two winding posts, the second magnetic end cap is connected to the second ends of the at least two winding posts, the first magnetic end cap is fixedly mounted on the first supporting surface through a glue or a clamping structure, and the second magnetic end cap is fixedly mounted on the second supporting surface through a glue or a clamping structure.

In an embodiment of the present invention, the outer contour of the coil is circular, and the side of the connecting column adjacent to the outer contour of the coil is an inclined plane.

In an embodiment of the present invention, the magnetic core is horizontally fixed to the base, and each the relative left and right sides of the wrapping post are planes, each the relative upper side and lower side of the wrapping post are arc surfaces matched with the inner contour of the coil.

The utility model discloses an inductance has sufficient wire winding space between base and the magnetic core after base and magnetic core combination, after the magnetic core wound the line, the end of a thread of coil had sufficient reason line space with the base, so can realize automatic wire winding and reason line. Therefore, the utility model discloses an inductance can make up automatically, production efficiency is high, material cost is low, the product unit price is low. And, the utility model discloses an inductance heat radiating area is big, and heat dispersion is good.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1A is a schematic perspective view of a horizontal inductor;

FIG. 1B is a schematic structural diagram of a base of the horizontal inductor in FIG. 1A;

fig. 1C is a schematic structural diagram of the horizontal inductor shown in fig. 1A after the magnetic core and the coil thereon are assembled;

fig. 2A is a schematic perspective view of an inductor according to the present invention;

FIG. 2B is a schematic structural diagram of a base of the inductor shown in FIG. 2A;

fig. 2C is a cross-sectional view of the inductor in fig. 2A in longitudinal section, showing the distance relationship between the winding package and the base during automatic winding;

FIG. 2D shows the structure of the inductor in FIG. 2C after the winding process is completed, the two ends of the coil are wound on the terminal pins by the winding machine;

fig. 3A shows the structure of one of the steps of the method for manufacturing an inductor according to the present invention, wherein a base is provided;

fig. 3B shows a structure of one of the steps of the method for manufacturing an inductor according to the present invention, wherein a magnetic core is provided and is automatically glued and fixedly mounted on the base by using a glue-dispensing fixture;

fig. 3C shows a structure of one of the steps of the method for manufacturing an inductor according to the present invention, wherein two coils are provided and are automatically wound on two winding posts of the magnetic core by using a winding device;

fig. 4 shows a method for manufacturing an inductor according to the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," "the," "said," and "at least one" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Relative terms, such as "upper" or "lower," may be used in embodiments to describe one component of an icon relative to another component. It will be appreciated that if the device of the icon is turned upside down, components described as being on the "upper" side will be components on the "lower" side. Furthermore, the terms "first," "second," and the like in the claims are used merely as labels, and are not numerical limitations of their objects.

As shown in fig. 2A-2D, an inductor 200 according to a preferred embodiment of the present invention mainly includes a base 21, a magnetic core 22, and at least two coils 23.

The base 21, as shown in fig. 2A and 2B, for example, may include a first supporting base 211 and a second supporting base 212 which are oppositely disposed, and a connecting column 213 connected between the first supporting base 211 and the second supporting base 212. The base 21 has at least two routing vias, such as but not limited to routing via 214 and routing via 215, with one of the connection posts 213 between two adjacent routing vias. In other words, the winding through holes 214 and 215 may be defined by the first support base 211, the second support base 212, and the connection column 213, for example. As shown in fig. 2B, the base 21 is substantially "i" shaped, wherein the left side of the winding through hole 214 is open, and the right side of the winding through hole 215 is open, so as to provide more space for subsequent winding and wire arrangement, and facilitate heat dissipation of the inductor coil. Preferably, the first supporting base 211 has a first supporting surface 2111, and a first protrusion 2112 formed to extend upward along an outer edge of the first supporting surface 2111; the second support base 212 has a second support surface 2121 and a second protrusion 2122 formed extending upward along an outer edge of the second support surface 2121. The first protrusion 2112 and the second protrusion 2122 can be used for limiting and fixing the magnetic core 22 in the subsequent magnetic core 22 assembling and fixing process, and can be used for a manipulator or other devices to perform operations such as grasping on the base 21 in the production process, so that the magnetic core 22 assembled on the base 21 can be protected, that is, the magnetic core 22 is prevented from being damaged in the grasping process. The base 21 further includes a plurality of connection pins, for example, at least two first connection pins 2113 and 2114 disposed on the first support base 211, and at least two second connection pins 2123 and 2124 disposed on the second support base 212.

The core 22, as shown in fig. 2A, is horizontally fixed on the base 21, and has at least two winding posts, such as but not limited to winding post 221 and winding post 222, disposed parallel to each other. The core 22 is fixedly mounted on the base 21, and the at least two winding posts (e.g. including the winding posts 221, 222) of the mounted core 22 are disposed corresponding to the at least two winding through holes (e.g. including the winding through holes 214, 215). Specifically, the winding post 221 is mounted above the winding through hole 214, and the winding post 222 is mounted above the winding through hole 215. In the preferred embodiment, the magnetic core 22 further includes a first magnetic end cap 223 and a second magnetic end cap 224, the first magnetic end cap 223 is connected to a first end of the at least two winding posts (e.g., including the winding posts 221, 222), and the second magnetic end cap 224 is connected to a second end of the at least two winding posts (e.g., including the winding posts 221, 222). Also, first magnetic end cap 223 may be fixedly mounted to first support surface 2111 by glue, and second magnetic end cap 224 may be fixedly mounted to second support surface 2121 by glue. It should be noted that the glue may be glue, solid glue or double-sided glue. In other embodiments, the magnetic core 22 may be fixedly mounted on the base 21 by providing a snap structure instead of being fixed by glue.

The at least two coils 23, as shown in fig. 2A, are correspondingly wound on the at least two winding posts and respectively form a coil, for example, but not limited to, a coil 231 formed on the winding post 221 and a coil 232 formed on the winding post 222. The lower surface of the coil 231 is exposed to the air through the winding through hole 214, and the lower surface of the coil 232 is exposed to the air through the winding through hole 215, so that the heat dissipation effect can be effectively improved. Also, the first terminal of each coil 23 may be correspondingly mounted on the first connection legs 2113 and 2114 of the first support base 211 (for example, as a stub outgoing line), the second terminal of each coil 23 may be correspondingly mounted on the second connection legs 2123 and 2124 of the second support base 212 (for example, as a tail outgoing line), and as shown in fig. 2D, the second terminal 2314 of the coil 23 forming the coil 231 is mounted on the second connection leg 2124 of the base 21, for example, and the second terminal 2313 of the coil 23 forming the coil 232 is mounted on the second connection leg 2123 of the base 21, for example.

In the present invention, as shown in fig. 2A and 2C, the minimum distance L between the central axis I of each winding post (e.g. including the winding posts 221 and 222) and the edge of the corresponding winding through hole (e.g. including the winding through holes 214 and 215) is greater than one-half of the maximum distance C between the outer contours of the coils (e.g. including the coils 231 and 232) formed on the winding post (i.e. L > C/2). Here, the edge of the winding through hole refers to an edge parallel to the central axis I, i.e., an edge defined by the side surfaces 2131 and 2132 of the connecting column 213, rather than an edge defined by the side surfaces of the first and second support bases 211 and 212, which will be described first.

In the present invention, preferably, as shown in fig. 2A, the outline of the coils 231, 232 may be circular, for example. The side surfaces of the connecting column 213 adjacent to the outer contours of the coils 231, 232 may be, for example, inclined surfaces, for example, as shown in fig. 2B and 2C, and the two side surfaces 2131, 2132 of the connecting column 213 are inclined surfaces. That is, the width of the upper surface of the connecting column 213 is smaller than that of the lower surface, and the longitudinal section of the connecting column 213 is substantially trapezoidal, so that not only more space is provided for winding and arranging wires, but also the supporting strength of the connecting column 213 is improved. Also, as shown in fig. 2B, a first distance D1 between both ends of the first support base 211 may be less than or equal to a second distance D2 between both ends of the second support base 212. Also, a first pitch between adjacent two first terminal pins (e.g., 2113 and 2114) may be smaller than a second pitch between adjacent two second terminal pins (e.g., 2123 and 2124). Therefore, the fool-proof function can be realized in the production and manufacturing process. Of course, it is understood that in other embodiments, the first distance D1 may be equal to the second distance D2, and the first pitch may be equal to the second pitch, which are not intended to limit the present invention.

In the present invention, referring to fig. 2C, the winding posts 222 are taken as an example, the opposite left side 2221 and right side 2222 of each winding post 222 may be a plane, and the opposite upper side 2223 and lower side 2224 of each winding post 222 are curved surfaces matched with the inner contour of the coil 232.

As shown in fig. 4, with reference to fig. 3A to 3C, the method 400 for manufacturing an inductor of the present invention mainly includes:

step 41, providing a base 21, as shown in fig. 3A, having at least two winding vias 214, 215 thereon;

step 42, providing a magnetic core 22 having at least two winding posts 221, 222 arranged in parallel with each other, and fixedly mounting the magnetic core 22 on the base 21, as shown in fig. 3B, wherein the at least two winding posts 221, 222 of the mounted magnetic core 22 are arranged corresponding to the at least two winding through holes 214, 215;

step 43, providing at least two coils 23, and utilizing a winding device to automatically wind the coils 23 on the at least two winding posts 221, 222 correspondingly and respectively form a coil 231, 232, as shown in fig. 3C, wherein a minimum distance L between a central axis of each winding post 221, 222 and an edge of the corresponding winding through hole 214, 215 is greater than one half of a maximum distance C between outer contours of the coil 231, 232 formed on the winding post 221, 222 (i.e. L > C/2, as shown in fig. 2C).

It should be noted that, in step 42, the magnetic core 22 can be automatically glued and fixed on the base 21 by using a glue-dispensing fixture. The magnetic core 22 may be automatically fixed to the base 21 by gluing using a gluing fixture, which may automatically glue a double-sided tape or the like. The magnetic core 22 can also be clamped and fixedly mounted on the base 21 by using a clamping structure, so that a dispensing fixing device and a gluing fixing device can be omitted.

The present invention further provides a method for manufacturing an inductor, comprising: winding the terminal of the coil 23 on the terminal pin of the base 21 by using a manipulator device; the terminals are soldered to the terminal pins automatically using a soldering device.

The utility model discloses in, the utility model discloses an inductance is behind base 21 and the combination of magnetic core 22 (for example, fixed through the automatic point of point gum machine is glued), because L > C/2, can have sufficient wire winding space between base 21 and the magnetic core 22, so usable coiling machine carries out automatic wire winding. When the magnetic core 22 is wound, the wire is automatically arranged because the wire end of the coil 23 has enough wire arranging space with the base 21. Therefore, the utility model discloses an inductance can realize automatic place and glue combination, wire winding, reason line, processes such as welding in whole manufacture process, and then can realize that production efficiency is high, material cost is low, the product unit price is low. And, the utility model discloses an inductance heat radiating area is big, and heat dispersion is good.

Exemplary embodiments of the present invention have been particularly shown and described above. It is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. An inductor, comprising:

the base is provided with at least two winding through holes;

the magnetic core is fixedly arranged on the base, and the at least two winding posts of the installed magnetic core are arranged corresponding to the at least two winding through holes; and

at least two coils which are correspondingly wound on the at least two winding posts and respectively form a coil;

the minimum distance between the central axis of each winding post and the edge of the corresponding winding through hole is larger than one half of the maximum distance between the outer contours of the coils formed on the winding posts.

2. The inductor as claimed in claim 1, wherein a connecting post is disposed between two adjacent winding vias.

3. The inductor as claimed in claim 2, wherein the base comprises a first supporting base and a second supporting base which are oppositely disposed, and the connection post is connected between the first supporting base and the second supporting base.

4. The inductor according to claim 3, wherein a first distance between two ends of the first support base is less than or equal to a second distance between two ends of the second support base.

5. An inductor according to claim 3, wherein said base further comprises a plurality of terminal pins, said plurality of terminal pins including at least two first terminal pins disposed on said first support base and at least two second terminal pins disposed on said second support base.

6. An inductor according to claim 5, characterized in that the first terminal of each of said coils is correspondingly mounted on said first terminal pin, and the second terminal is correspondingly mounted on said second terminal pin; and/or a first pitch between two adjacent first wiring pins is smaller than a second pitch between two adjacent second wiring pins.

7. The inductor as claimed in claim 3, wherein the first supporting base has a first supporting surface and a first protrusion extending upward along an outer edge of the first supporting surface; the second support base is provided with a second support surface and a second protruding part formed by extending upwards along the outer side edge of the second support surface.

8. The inductor according to claim 7, wherein the magnetic core further comprises a first magnetic end cap and a second magnetic end cap, the first magnetic end cap is connected to the first ends of the at least two winding posts, the second magnetic end cap is connected to the second ends of the at least two winding posts, the first magnetic end cap is fixedly mounted on the first supporting surface through a glue or clamping structure, and the second magnetic end cap is fixedly mounted on the second supporting surface through a glue or clamping structure.

9. The inductor according to any one of claims 2 to 8, wherein the outer contour of the coil is circular, and the side surface of the connection post adjacent to the outer contour of the coil is a slope.

10. The inductor as claimed in claim 9, wherein said core is horizontally fixed to said base, and opposite left and right sides of each of said winding legs are flat, and opposite upper and lower sides of each of said winding legs are curved to match an inner contour of said coil.

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