CN210896868U - Inductance structure - Google Patents

Abstract

The utility model discloses an inductance structure, including magnetic core, coil and dustcoat, the magnetic core include the magnetism post and at the cap portion on magnetism post top, the coil suit that constitutes is convoluteed by banded flat line is on the magnetism post to the both ends of coil are turned over to pasting and are constituted the electrode pin at the top surface of cap portion, the dustcoat cladding covers magnetic core and coil and barely expose the electrode pin. Inductance structure inside solderless, compact structure, stable, can effectively improve performance, use reliability and stability, product machining efficiency is high, the yields is high, inductance structure's full rate of groove is high, has reduced the direct current resistance of coil, can reduce product operating power loss.

Description

Inductance structure

Technical Field

The utility model relates to an electron device technical field especially relates to an inductance structure.

Background

The inductor is an important component in a circuit, and can achieve the functions of filtering, energy storage, matching and resonance, the current inductor structure is usually that a coil is wound on a magnetic core in a die, a lead frame is welded at the end part of the coil, then the coil is filled and covered with a magnetic material to form an outer cover, and the lead frame penetrates out of an electrode pin of the outer cover to form the inductor structure, so that the integral inductor structure is obtained through die-casting molding. Traditional inductance structure has the solder joint between coil and the lead frame in inside, has the solder joint pressurized and becomes the situation of opening a way, virtual connection at die-casting fashioned in-process, has reduced the yields of inductance, seriously influences the performance and the stability in use of inductance, has the welding process step of coil and lead frame, and processing is loaded down with trivial details, inefficiency.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve and the technical task that provides improve prior art, provide an inductance structure, solve the inside solder joint that exists between coil and the lead frame of inductance structure among the prior art, cause the solder joint to open a way when die-casting shaping easily and influence inductance performance and stability in use's problem.

For solving the above technical problem, the technical scheme of the utility model is that:

the utility model provides an inductance structure, includes magnetic core, coil and dustcoat, the magnetic core include the column magnet and at the cap portion of column magnet top, the coil suit that constitutes by the winding of banded ribbon flat wire is on the column magnet to the both ends of coil are turned over to paste and are constituted electrode pin in the top surface of cap portion, the dustcoat cladding covers magnetic core and coil and exposes electrode pin. Inductance structure cancel traditional coil end welding lead frame constitute the mode of electrode pin, directly constitute the electrode pin with the exposed both ends of coil outside, need not to carry out welding process step, can effectively improve machining efficiency to solve the problem that die-casting shaping caused the solder joint to open a way easily, effectively improve the production yields of inductance, improve the performance of inductance, reliability and stability in use, the utility model discloses a winding of banded ribbon line into coil can improve inductance structure's groove fullness rate, reduces coil direct current resistance, reduces product operating power loss, the constitution electrode pin that the tip of banded ribbon flat line's coil can be better is favorable to inductance structure to carry out reliable, stable welding equipment, reduces the risk that the rosin joint appears, improves electric connection's stability, avoids appearing the electrically conductive bad situation.

Further, the foremost ends at the two ends of the coil extend from the top surface of the cap part to one side of the bottom surface of the cap part in a bending mode to form a front end bending part, and the front end bending part is covered by the outer cover, so that the two ends of the coil are more effectively fixed, the stability of the electrode pins is improved, the situation that the electrode pins are deformed and broken accidentally under the action of external force is avoided, and the overall integrity of the inductance structure is guaranteed.

Furthermore, the edge of the cap is provided with an arc transition part, so that the situation that the coil is scratched and broken by the strip-shaped flat wire due to the sharp edge of the cap when the coil is turned over to the top of the cap along the edge end of the cap is avoided, the integrity of the coil is guaranteed, and the use performance of the inductance structure is guaranteed.

Furthermore, the edge of the cap part is provided with a notch groove for positioning the position of the coil end part in a turnover manner, so that the coil end part can be accurately turned over and turned in place, the accuracy of the position of the electrode pin is guaranteed, the electrode pin can be accurately connected with a bonding pad of a circuit board when the inductance structure is used subsequently, the inductance structure can be ensured to work normally and stably, and the condition of poor contact is avoided.

Further, the bottom edge of magnetism post be provided with the chamfer, can be with the coil convolute in advance directly overlap on the magnetism post again, the chamfer plays the effect of direction transition, the smooth and easy cover of coil of being convenient for is on the magnetism post, the magnetism post is formed through the powdery material suppression, the chamfer also plays the effect that improves magnetism post bottom edge stability, avoids magnetism post bottom edge to appear falling the situation of piece, unfilled corner, ensures the integrity of magnetism post.

Further, the whole cover that is of dustcoat have an open-ended cover to the opening edge of dustcoat flushes with the top surface of cap portion, can ensure that the electrode pin exposes outside height, thereby guarantee the welding stability between the pad of electrode pin and circuit board, avoid appearing the situation of rosin joint.

Furthermore, the coil is wound on the magnetic column in a mode that the wide surface of the strip-shaped flat wire faces the cap, so that the slot filling rate of the inductance structure can be effectively improved, and the use performance of the inductance structure is improved.

Furthermore, the magnetic core is formed by pressing a magnetic material, the outer cover is formed by pressing the magnetic material, and the magnetic core and the outer cover are made of different materials, so that the performance of the inductance structure is improved.

Compared with the prior art, the utility model discloses the advantage lies in:

inductance structure inside solderless, compact structure, stable, can effectively improve performance, use reliability and stability, product machining efficiency is high, the yields is high, inductance structure's full rate of groove is high, has reduced the direct current resistance of coil, can reduce product operating power loss.

Drawings

Fig. 1 is a schematic diagram of the overall structure of an inductor structure;

FIG. 2 is a schematic cross-sectional view of an inductor structure;

FIG. 3 is a schematic diagram of an assembly structure of a magnetic core and a coil;

fig. 4 is a schematic structural view of the magnetic core.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model discloses an inductance structure, simple structure, compactness to coil end constitutes welding pin, cancels traditional welded structure, and processing is convenient, efficient, effectively improves the yields, improves inductance performance and stability in use.

As shown in fig. 1 to 4, an inductor structure mainly includes a magnetic core 1, a coil 2 and an outer cover 3, the whole magnetic core 1 is T-shaped, the magnetic core 1 includes a magnetic pillar 11 and a cap 12 at the top end of the magnetic pillar 11, the area of the cap 12 is larger than the size of the cross section of the magnetic pillar 11, the coil 2 is formed by spirally winding a ribbon flat wire, the coil 2 is sleeved on the magnetic pillar 11, the coil 2 is wound on the magnetic pillar 11 in a manner that the wide surface of the ribbon flat wire faces the cap 12, the slot filling ratio of the inductor structure improves the usability of the inductor structure, and both ends of the coil 2 are folded over to the top surface of the cap 12 and abut against the top surface of the cap 12 to form an electrode pin 21, and the outer cover 3 covers the magnetic core 1 and the coil 2 and exposes the electrode pin 21.

Firstly, a magnetic core 1 is obtained by pressing and molding a magnetic material through a die; then the pre-wound coil 2 is sleeved on the magnetic column 11 of the magnetic core 1, the edge of the bottom end of the magnetic column 11 is provided with a chamfer 15, the chamfer plays a role in guiding transition, the coil is conveniently and smoothly sleeved on the magnetic column, then two ends of the coil 2 are turned over to the top surface of the cap part 12, or a linear strip-shaped flat wire can be directly wound on the magnetic column 11 to form the coil, and then two ends of the coil 2 are turned over to the top surface of the cap part 12; then put into the mould with magnetic core 1 of having assembled coil 2, fill the magnetic material who is used for constituting the dustcoat, obtain dustcoat 3 through the compression moulding of second time to dustcoat 3 is as an organic whole through the suppression with magnetic core 1, coil, and the material of magnetic core 1 and dustcoat 3 is different, improves inductance structure's performance.

Specifically, the foremost ends of the two ends of the coil 2 are bent and extended from the top surface of the cap 12 to the bottom surface side of the cap 12 to form the front end bent portions 22, the front end bent portions 22 are lower than the top surface of the cap 12, and the front end bent portions 22 are covered by the outer cover 3, so that the structural stability of the electrode leads 21 is improved; the outer cover 3 is a cover body with an opening integrally, the outer cover 3 covers the edge of the cap part 12, and the opening edge of the outer cover 3 is flush with the top surface of the cap part 12, so that the electrode pins 21 can be ensured to protrude outside well, and the welding stability between the electrode pins and the welding pads of the circuit board is ensured; the edge of the cap 12 is provided with an arc transition part 13, so that two ends of the coil 2 can be turned over to the top surface of the cap 12 along the edge of the cap 12, the coil 2 is prevented from being broken or scratched, and the stable performance of the inductance structure is guaranteed; and the edge of the cap part 12 is also provided with a notch 14 for positioning the turnover position of the end part of the coil 2, so that the electrode pin 21 formed by the end part of the coil 2 has an accurate position, the electrode pin can be accurately connected with a pad of a circuit board when the inductor structure is used subsequently, the inductor structure can work normally and stably, and the condition of poor contact is avoided.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims (8)

1. The utility model provides an inductance structure, characterized in that, includes magnetic core (1), coil (2) and dustcoat (3), magnetic core (1) including post (11) and cap portion (12) on post (11) top, coil (2) suit that constitute by the winding of banded ribbon flat line is on post (11) to the both ends of coil (2) are turned over to paste and are constituted electrode pin (21) by the top surface of leaning on cap portion (12), dustcoat (3) covers magnetic core (1) and coil (2) and expose electrode pin (21).

2. The inductance structure according to claim 1, wherein the coil (2) has two ends, the foremost ends of which are bent and extended from the top surface of the cap (12) to the bottom surface side of the cap (12) to form the front end bent portions (22), and the front end bent portions (22) are covered with the outer cover (3).

3. An inductor structure according to claim 1, characterized in that the cap (12) is provided with an arcuate transition (13) at its edge.

4. The inductance structure of claim 1, wherein the edge of the cap (12) is provided with a notch groove (14) for positioning the end folding position of the coil (2).

5. An inductor structure according to any one of claims 1 to 4, characterized in that the bottom edge of said pillar (11) is provided with a chamfer (15).

6. An inductor structure according to any one of claims 1 to 4, characterized in that the cover (3) is a cover having an opening, and the edge of the opening of the cover (3) is flush with the top surface of the cap (12).

7. An inductance structure according to any one of claims 1 to 4, characterized in that said coil (2) is wound around a magnetic pole (11) in such a manner that the wide surface of a strip-like flat wire faces a cap (12).

8. An inductor structure according to any one of claims 1 to 4, characterized in that said core (1) is pressed from a magnetic material, said cover (3) is pressed from a magnetic material, and the material of said core (1) is different from that of said cover (3).

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