CN217035339U

CN217035339U - Heightening type common mode inductor capable of improving heat dissipation effect

Info

Publication number: CN217035339U
Application number: CN202220778661.7U
Authority: CN
Inventors: 郭长海
Original assignee: Dongguan Meixi Electronic Co ltd
Current assignee: Dongguan Meixi Electronic Co ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-07-22
Anticipated expiration: 2032-04-06

Abstract

The utility model discloses a heightening type common mode inductor for improving the heat dissipation effect, which comprises a framework, a magnetic core arranged on the framework, and a first coil and a second coil which symmetrically surround the magnetic core, wherein the first coil and the second coil are respectively provided with two welding parts positioned at the head end and the tail end, and the head end and the tail end of a flat copper foil are directly used as the welding parts; the week side interval formula of skeleton is provided with four locating holes, and the corresponding locating hole is passed downwards to the weld part, and, the equal downwardly extending in four corners position of skeleton bottom is formed with the enhancement reference column, and the upper end of strengthening the reference column has spacing portion, and the lower terminal surface of spacing portion is used for contacting spacingly with the up end of circuit board, and its head, the tail end that utilizes flat copper foil when through strengthening the reference column are as the weld part, and the lower extreme that utilizes spacing portion contacts spacingly with the circuit board, establishes the skeleton pad, forms the heat dissipation space that is located between circuit board and the skeleton bottom, improves the radiating effect.

Description

Heightening type common mode inductor for improving heat dissipation effect

Technical Field

The utility model relates to the technical field of transformers, in particular to a heightening type common mode inductor for improving a heat dissipation effect.

Background

The common mode inductor is also called as a common mode choke coil, and is commonly used for filtering common mode electromagnetic interference signals in a switching power supply of a computer. The common mode inductor usually winds two groups of coils on a magnet, the part led out by each group of coils is respectively connected with a live wire and a zero line, the existing common mode inductor generally adopts a circular ring-shaped magnet, and enameled wires are wound at two ends of the magnet.

In prior art, common mode inductance is including magnetic core, coil and skeleton, install on the skeleton the bottom of magnetic core, the magnetic core is connected the both ends and the circuit board of coil through the stitch that is fixed in on the skeleton, and when common mode inductance during operation, the resistance of coil must consume the electric energy, because common mode inductance does not have the heat dissipation function, causes easily in the inductance and the plastic part around the inductance damages.

Afterwards, a common mode inductor with a heat dissipation function appears on the market, and the common mode inductor comprises a magnetic core, a coil and a framework, wherein the framework is provided with heat dissipation fins, and the bottom end face of the framework is attached to a circuit board. It dispels the heat to common mode inductance through the fin, however, because the bottom face of skeleton is direct with the laminating of circuit board, the heat on the long-time use common mode inductance is difficult to distribute through the fin to influence common mode inductance's performance and even cause common mode inductance to damage unable normal use, reduced common mode inductance life's problem.

Therefore, a new technical solution is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to the defects in the prior art, and a main object of the present invention is to provide a raised common mode inductor with improved heat dissipation effect, in which a framework is raised by structural design and cooperation of a soldering portion and a reinforcing positioning post to form a heat dissipation space between a circuit board and a framework bottom, so as to effectively solve the problem that the common mode inductor is damaged and cannot be normally used due to the fact that heat on the common mode inductor is difficult to dissipate after long-time use in the conventional technology.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an elevating common mode inductor for improving heat dissipation effect comprises a frame, a magnetic core arranged on the frame, a first coil and a second coil symmetrically surrounding the magnetic core,

the first coil and the second coil are both formed by winding flat copper foils; the first coil and the second coil are respectively provided with two welding parts positioned at the head end and the tail end, and the head end and the tail end of the flat copper foil are directly used as the welding parts;

four positioning holes are arranged on the periphery of the framework at intervals and penetrate through the upper end and the lower end of the framework respectively; the welding part downwards passes through the corresponding positioning hole and protrudes out of the bottom of the framework to form a welding pin exposed out of the bottom end of the framework;

the four corners of the bottom of the framework extend downwards to form reinforced positioning columns, and the reinforced positioning columns are plastic columns which are integrally formed by injection molding of the framework; the upper end of strengthening the reference column has spacing portion, the lower terminal surface of spacing portion is used for contacting spacing with the up end of circuit board, just the lower terminal surface of spacing portion is less than the lower terminal surface of skeleton, the lower terminal surface of welding foot flushes or is less than the lower terminal surface of spacing portion.

As a preferred scheme, the skeleton bottom is provided with a plurality of heat dissipation through-holes, the heat dissipation is led to the upper and lower extreme that link up the skeleton to the outside magnetic core, first coil, the second coil place region on bottom and skeleton upper portion that feed through the skeleton, further improved the radiating effect.

As a preferred scheme, the magnetic core has first wrapping post, first spliced pole, second wrapping post, second spliced pole and center pillar, first wrapping post, first spliced pole, second wrapping post, second spliced pole connect gradually and enclose the integral type magnetic core that forms square frame form, just, the both ends of center pillar be a body coupling respectively between the position placed in the middle of first spliced pole and second spliced pole, first coil and second coil encircle in first wrapping post, second wrapping post respectively.

As an optimal scheme, the both sides of center pillar are provided with the concave position of arc respectively, and, the concave position of arc of both sides is just to setting up, on the one hand, under the condition that does not influence wire winding size for the space that forms the clearance between first coil and second coil and the center pillar is bigger, is favorable to the radiating effect, and on the other hand, the concave position of arc of both sides is conveniently held between fingers the operation.

As a preferred scheme, the bottom of first coil and second coil supports in the concave arc groove of the top of skeleton, just the bottom of magnetic core keeps the clearance with the top of skeleton, utilizes the coil itself to fix a position with the concave arc groove of the top of skeleton mutually, further is favorable to promoting the radiating effect.

Preferably, the peripheral side of the framework has four side faces; the four positioning holes are arranged on three side faces of the periphery of the framework.

As a preferable scheme, glue is coated on the outer side surface of the reinforcing positioning column, and after the reinforcing positioning column extends into the corresponding hole site of the circuit board, tight-fit positioning is formed between the reinforcing positioning column and the inner wall surface of the corresponding hole site of the circuit board, and adhesive fixation is formed.

Compared with the prior art, the utility model has obvious advantages and beneficial effects, and particularly, according to the technical scheme, the wiring terminal in the traditional design is changed into the reinforced positioning column mainly through the structural design and the matching of the welding part and the reinforced positioning column, the head and the tail end of the flat copper foil are used as the welding part, the process of wiring the wiring terminal of the winding wire and the wiring terminal is omitted, the lower end of the limiting part is in contact with the circuit board for limiting, the framework is arranged in a cushioning manner, a heat dissipation space between the circuit board and the bottom of the framework is formed, and the heat dissipation effect is improved. Moreover, the production and manufacture of the framework are simplified compared with the scheme that the framework needs to be embedded with metal binding posts in the traditional technology.

The common mode inductor is characterized in that the circuit board is provided with a plurality of positioning holes, the circuit board is provided with a plurality of positioning columns, and the positioning columns are arranged on the circuit board in a protruding mode.

In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a front view of an embodiment of the present invention;

FIG. 2 is a top view of an embodiment of the present invention;

FIG. 3 is a rear view of an embodiment of the present invention;

FIG. 4 is a schematic diagram of a first usage state of the embodiment of the present invention;

FIG. 5 is a diagram illustrating a second usage state of the present invention.

Description of the figures:

10. skeleton 11, locating hole

12. Reinforced positioning post 121, limiting part

13. Heat dissipation through hole 20 and magnetic core

21. First wrapping post 22 and first connecting post

23. A second winding post 24 and a second connecting post

25. Center post 251, arc concave position

30. First coil 31, weld

40. Second coil 50, circuit board

60. And a heat dissipation space.

Detailed Description

Fig. 1 to 5 show specific structures of embodiments of the present invention.

In the description of the present invention, it should be noted that, for the orientation words, such as "upper", "lower", "front", "rear", "left", "right", etc., indicating the orientation and positional relationship as shown in the drawings or in normal use of wearing, are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operation, and should not be construed as limiting the specific scope of the present invention.

A heightening type common mode inductor for improving heat dissipation effect comprises a framework 10, a magnetic core 20 arranged on the framework 10, and a first coil 30 and a second coil 40 which symmetrically surround the magnetic core 20.

Four positioning holes 11 are arranged on the peripheral side of the framework 10 at intervals, and the peripheral side of the framework 10 is provided with four side faces; the four positioning holes 11 are arranged on three side surfaces of the periphery of the framework 10, and the positioning holes 11 respectively penetrate through the upper end and the lower end of the framework 10; the welding parts 311 pass through the corresponding positioning holes 11 downwards and protrude out of the bottom of the framework 10 to form welding feet 31 exposed out of the bottom end of the framework 10;

and, the equal downwardly extending of four corners position of skeleton 10 bottom is formed with strengthens reference column 12, usually, it is the plastic column to strengthen reference column 12, and it is by the integrative injection moulding of skeleton 10, easily production preparation compares and need bury metal terminal underground among the traditional art, and when shaping skeleton 10, the shaping is simpler, and shaping efficiency is higher, and moreover, the mould structure is also simpler. The upper end of the reinforced positioning column 12 is provided with a limiting part 121, the lower end surface of the limiting part 121 is used for contacting and limiting the upper end surface of a circuit board 50, the lower end surface of the limiting part 121 is lower than the lower end surface of the framework 10, and the lower end surface of the welding foot 31 is flush with or lower than the lower end surface of the limiting part 121, so that a binding post in the traditional design is changed into the reinforced positioning column 12, the head and the tail end of a flat copper foil are used as a welding part 311, the process of wiring a wiring terminal of a winding wire and the binding post is avoided, the lower end of the limiting part 121 is contacted and limited with the circuit board 50, the framework 10 is arranged in a cushioning manner, a heat dissipation space 60 between the circuit board 50 and the bottom of the framework 10 is formed, the heat dissipation effect is improved, the contact limiting effect of the limiting part 121 is utilized, and the reinforced positioning column 12 can extend into a corresponding hole position of the circuit board 50 for positioning, ensure that whole common mode inductance is though relative circuit board 50 is bed hedgehopping and hangs and establish, still satisfy the equipment steadiness, moreover, its structure is comparatively simple, easily installation and application, furthermore, can be at the outside surface coating glue who strengthens reference column 12, fix a position in strengthening the corresponding hole site that reference column 12 can stretch into circuit board 50 again, so, make between the internal face of strengthening the corresponding hole site of reference column 12 and circuit board 50, not only form the tight fit location, form sticky fixed moreover, improve the bonding firmness.

The heat dissipation structure is characterized in that a plurality of heat dissipation through holes 13 are formed in the bottom of the framework 10, the heat dissipation through holes 13 penetrate through the upper end and the lower end of the framework to communicate the bottom outside of the framework 10 with the areas where the magnetic core 20, the first coil 30 and the second coil 40 are located on the upper portion of the framework 10, and therefore the heat dissipation effect is further improved.

The magnetic core 20 has a first winding leg 21, a first connection leg 22, a second winding leg 23, a second connection leg 24, and a center leg 25, the first winding post 21, the first connecting post 22, the second winding post 23 and the second connecting post 24 are sequentially connected with one another to form the integrated magnetic core 20 in a square frame shape, and both ends of the center pillar 25 are integrally connected between the central positions of the first and

second connection pillars

22 and 24, respectively, the first coil 30 and the second coil 40 respectively surround the first winding pillar 21 and the second winding pillar 23, the two sides of the middle column 25 are respectively provided with arc concave positions 251, and the arc concave positions 251 at the two sides are arranged oppositely, on one hand, under the condition that does not influence wire winding size for the space that forms the clearance between first coil 30 and second coil 40 and the center pillar 25 is bigger, is favorable to the radiating effect, and on the other hand, the arc concave position 251 of both sides conveniently is held between fingers the operation.

The first coil 30 and the second coil 40 are both formed by winding flat copper foils; the first coil 30 and the second coil 40 are provided with two welding parts 311 positioned at the head end and the tail end, and the head end and the tail end of the flat copper foil are directly used as the welding parts 311; the bottom of first coil 30 and second coil 40 supports in the concave arc groove (not shown in the figure) at the top of skeleton 10, just the bottom of magnetic core 20 keeps the clearance with the top of skeleton 10, because the coil that the winding of flat copper foil formed, itself has the structural strength of preferred, non-deformable, consequently, can utilize coil itself to fix a position with the concave arc groove at the top of skeleton mutually, compare in the conventional art, generally need adopt magnetic core 20 and skeleton 10 to form the situation of large tracts of land contact location, this kind of mode is further favorable to promoting the radiating effect.

The design of the utility model is characterized in that the binding post of the traditional design is changed into the reinforced positioning column mainly through the structural design and the matching of the welding part and the reinforced positioning column, the head and the tail end of the flat copper foil are used as the welding part, the process of wiring the wiring end of the winding and the binding post is omitted, the lower end of the limiting part is in contact with the circuit board for limiting, the framework is arranged in a cushioning manner, a heat dissipation space between the circuit board and the bottom of the framework is formed, and the heat dissipation effect is improved. Moreover, the production and manufacturing of the framework are simplified compared with the traditional scheme that the framework needs to be embedded with metal binding posts.

The common mode inductor is characterized in that the limiting part is in contact with the circuit board, the reinforcing positioning column can extend into the corresponding hole position of the circuit board to be positioned, the whole common mode inductor is ensured to be in padding suspension relative to the circuit board, the assembly stability is still met, and the common mode inductor is relatively simple in structure and easy to install and apply.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. The utility model provides an improve effect of heat dissipation's bed hedgehopping type common mode inductance, its is including the skeleton with set up magnetic core and the first coil and the second coil of symmetric ring on the magnetic core on the skeleton, its characterized in that:

the four corners of the bottom of the framework extend downwards to form reinforced positioning columns, and the reinforced positioning columns are plastic columns which are integrally formed by injection molding of the framework; the upper end of strengthening the reference column has spacing portion, the lower terminal surface of spacing portion is used for contacting with the up end of circuit board spacingly, just the lower terminal surface of spacing portion is less than the lower terminal surface of skeleton, the lower terminal surface of welding foot flushes or is less than the lower terminal surface of spacing portion.

2. The common mode inductor of claim 1, wherein the common mode inductor comprises: the framework bottom is provided with a plurality of heat dissipation through holes, the heat dissipation through holes link up the upper and lower end of framework to the magnetic core, first coil, the second coil place region on the external and skeleton upper portion in bottom of intercommunication framework.

3. The common mode inductor of claim 1, wherein the common mode inductor comprises: the magnetic core has first wrapping post, first spliced pole, second wrapping post, second spliced pole and center pillar, first wrapping post, first spliced pole, second wrapping post, second spliced pole connect gradually and enclose the integral type magnetic core that becomes square frame form, just, the both ends of center pillar are respectively a body coupling between the position placed in the middle of first spliced pole and second spliced pole, first coil and second coil encircle respectively in first wrapping post, second wrapping post.

4. The elevated common mode inductor according to claim 3, wherein: the both sides of center pillar are provided with the arc concave position respectively, and, the arc concave position of both sides is just to setting up.

5. The common mode inductor of claim 1, wherein the common mode inductor comprises: the bottom of the first coil and the bottom of the second coil are abutted against the concave arc groove in the top of the framework, and a gap is kept between the bottom of the magnetic core and the top of the framework.

6. The elevated common mode inductor according to claim 5, wherein: the peripheral side of the framework is provided with four side faces; the four positioning holes are arranged on three side faces of the periphery of the framework.

7. The common mode inductor of claim 1, wherein the common mode inductor comprises: glue is coated on the outer side surface of the reinforcing positioning column, and after the reinforcing positioning column extends into the corresponding hole site of the circuit board, tight fit positioning is formed between the reinforcing positioning column and the inner wall surface of the corresponding hole site of the circuit board, and adhesive fixation is formed.