CN101950653B - Inductance device and magnetic core thereof - Google Patents
Inductance device and magnetic core thereof Download PDFInfo
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- CN101950653B CN101950653B CN2009101589671A CN200910158967A CN101950653B CN 101950653 B CN101950653 B CN 101950653B CN 2009101589671 A CN2009101589671 A CN 2009101589671A CN 200910158967 A CN200910158967 A CN 200910158967A CN 101950653 B CN101950653 B CN 101950653B
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Abstract
The invention discloses an inductance device and a magnetic core thereof. The inductance device comprises an inner magnetic core, a curl cord coiled on the inner magnetic core and provided with at least one curl cord tail end part, and an outer magnetic core internally provided with the inner magnetic core and coiled on the curl cord of the inner magnetic core. The outer magnetic core comprises a first surface, a second surface, at least one convex part and at least one conductive layer, wherein the first surface is provided with at least one electrode setting region, the second surface is arranged relative to the first surface, and the at least one convex part and the at least one conductive layer are coiled on the curl cord tail end part. The at least one convex part corresponds to the at least one electrode setting region and is formed on the second surface. The at least one conductive layer is formed on the at least one electrode setting region and extends to the outer surface of the at least one convex part.
Description
Technical field
The present invention relates to a kind of inductance device, relate in particular to the inductance device that a kind of electrode need not be provided with the groove of accommodating the spiral terminal part.
Background technology
Inductance device is used on many electronic equipments, for example: mobile phone, personal computer or television set etc.Inductance device has different kind of many kinds or kenel, and wherein a kind of is the spiral of reeling on the drum-shaped magnetic core, and its outside for toroidal core around the inductance device that is covering.
Can be provided with electrode on the aforementioned electric induction device; Two ends of the spiral on the drum-shaped magnetic core are electrically connected to respectively on the corresponding electrode; With the electric contact of said electrode arrangement on circuit board, so inductance device just can be brought into play its intended function on circuit board afterwards.Traditionally; Can be provided with a plurality of sheet of copper terminals on the side of aforesaid inductance device; The part of copper tip is bent, and two ends of spiral are welded to corresponding copper tip respectively to become electrode, so also can two ends of spiral be electrically connected on the electrode.Yet copper tip utilizes viscose glue to adhere on the inductance device.Use viscose glue adhesion poor reliability, especially in the middle of reflux technique, the phenomenon of deterioration can take place because viscose glue receives the influence of high temperature, the situation that makes copper tip be easy to generate to come off.In addition, the electrical couplings poor-performing of copper tip, in the application of the high resonance frequency point of needs, copper tip can't satisfy this demand.
Fig. 1 shows the sketch map of another traditional electrical induction device 100.Two opposite sides of the toroidal core of traditional electrical induction device 100 are provided with groove 102; On its back side; Other is provided with the groove 104 that corresponds to said groove 102, after 106 of two ends of the spiral in the inductance device 100 passed through corresponding groove 102 respectively, is placed in the groove 104.At last, behind wicking, accomplish the welding of the end 106 of spiral.Usually, after welding was accomplished, face of weld can present protuberance made the face of weld out-of-flatness, and the phenomenon of this protuberance is unfavorable for that inductance device 100 is welded on the electric contact on the circuit board, and this protuberance is wayward, thereby reduced the fabricating quality of inductance device 100.
Though the problem of face of weld protuberance can deepen groove 104 to solve, darker groove 104 can make the toroidal core attenuation, makes it in the wicking welding procedure, and being easy to generate breaks or take place secretly splits, and seriously has influence on the performance of inductance device 100.The back side that two ends 106 of spiral are welded on toroidal core is except that aforesaid drawbacks; In welding process; Toroidal core needs darker immersion depth, and this also improves the risk that the toroidal core generation is broken or taken place secretly to split, and has influence on the yield of inductance device 100.
Therefore, be necessary to design a kind of new terminating method, to avoid the problems referred to above and to have higher electrical couplings performance to inductance device.
Summary of the invention
The present invention provides a kind of inductance device and magnetic core thereof.Said magnetic core has protuberance; The electrode of protuberance and inductance device connecting circuit plate relatively and corresponding setting, with the conductive layer electric connection, the spiral terminal part is wound on the protuberance between protuberance and the electrode; It is smooth to utilize the setting of protuberance that the electrode surface of inductance device is kept; And can reduce the spiral terminal part wicking degree of depth and time, and therefore can let magnetic core produce the risk of breaking or secretly splitting and greatly reduce, improve the technology yield.
Connect literary composition; The embodiment of the invention discloses a kind of magnetic core; It is through making up being installed on the circuit board and accommodating the coiling spiral with at least one spiral terminal part, second surface and at least one protuberance that said magnetic core comprises first surface, is provided with respect to said first surface.First surface has at least one electrode setting area, and said at least one electrode setting area is used to be provided with the electrode that is electrically connected at said circuit board.At least one protuberance is formed on the said second surface and is corresponding with said at least one electrode setting area, and said at least one protuberance is reeled through being provided for said spiral terminal part.
The embodiment of the invention discloses a kind of inductance device, and it is through making up to be installed on the circuit board, and said inductance device comprises inner magnetic core, spiral and outer magnetic core.Reel is around in said inner magnetic core and has at least one spiral terminal part.Outer magnetic core internal configurations has said inner magnetic core and is wound in the said spiral of said inner magnetic core, and said outer magnetic core comprises first surface, with respect to second surface, at least one protuberance and at least one conductive layer of said first surface setting.First surface has at least one electrode setting area, and said at least one electrode setting area is used to be provided with the electrode that is electrically connected at said circuit board.At least one protuberance is formed on the said second surface and is corresponding with said at least one electrode setting area, and said at least one protuberance is reeled through being provided for said spiral terminal part.At least one conductive layer is formed on said at least one electrode setting area and extends to the outer surface of said at least one protuberance.
Description of drawings
Fig. 1 shows traditional electrical induction device sketch map;
Fig. 2 shows the schematic perspective view of the inductance device of the embodiment of the invention;
The decomposing schematic representation of the inductance device of Fig. 3 displayed map 2;
Fig. 4 shows the schematic top plan view of the inductance device of the embodiment of the invention;
Fig. 5 shows the schematic side view of the inductance device of the embodiment of the invention;
Fig. 6 shows the elevational schematic view of the inductance device of the embodiment of the invention;
Fig. 7 shows the sketch map of protuberance of the outer magnetic core of the embodiment of the invention;
Fig. 8 shows the schematic perspective view of the inner magnetic core of the embodiment of the invention; And
Fig. 9 shows the sketch map of upper and lower flange of the inner magnetic core of the embodiment of the invention.
Embodiment
Fig. 2 shows the schematic perspective view of the inductance device 200 of the embodiment of the invention.The decomposing schematic representation of the inductance device 200 of Fig. 3 displayed map 2.Fig. 8 shows the schematic perspective view of the inner magnetic core 204 of the embodiment of the invention.With reference to Fig. 2,3 and 8, inductance device 200 can be a kind of surface adhesion type inductor that can directly be adhered to the electric contact (not illustrating) of circuit board 202, and it mainly comprises inner magnetic core 204, spiral 206 and outer magnetic core 208.Spiral 206 is wound on the inner magnetic core 204, and the spiral 206 behind the coiling has outward extending spiral terminal part 210.After spiral 206 is wound in inner magnetic core 204, be configured in outer magnetic core 208 inside.
In particular, with reference to Fig. 8 and Fig. 9, in the present embodiment, inner magnetic core 204 can be drum-shaped magnetic core, and it has columnar part 2041, upper flange part 2042 and lower flange 2043.Columnar part 2041 has cylindrical shape, and upper flange part 2042 and lower flange 2043 can be located at two ends of columnar part 2041 respectively, and the cross sectional shape of columnar part 2041 is not limited to circle, and it also can be other shape, for example: square or ellipse etc.The external diameter of upper flange part 2042 and lower flange 2043 is all greater than the diameter of columnar part 2041.The external diameter of upper flange part 2042 and lower flange 2043 can be identical, or like Fig. 8 and shown in Figure 9, and upper flange part 2042 has the external diameter bigger than lower flange 2043.Inner magnetic core 204 can be formed by magnetic materials such as manganese based ferrites, but is not limited thereto, and it also can use like materials such as nickel based ferrite, silicon steel plate, Sendust, beryllium Mo alloys.
Join Fig. 3 and Fig. 8 again, spiral 206 is wound in all side surfaces of columnar part 2041, leaves two toward the spiral terminal part 210 that extends laterally after spiral 206 is reeled, and makes external power source be able to circulation on the spiral 206 of reeling through said spiral 206 terminal parts 210.The material of spiral 206 can be copper, also can be other conductivity good metal.
To shown in Figure 6, magnetic core 208 outside looking down with reference to Fig. 3, and outer magnetic core 208 is the ring-shaped magnetic core of quadrangle shape haply, and in 4 corners on the outer magnetic core 208,1 corner is designed to fillet 2081, and other 3 corners then are designed to chamfering 2082.Have accommodation space 2083 in the outer magnetic core 208, said accommodation space 2083 is used to accommodate part inner magnetic core 204 and be wound in the spiral 206 on the inner magnetic core 204.In the present embodiment, the internal diameter of accommodation space 2083 is slightly larger than the external diameter of inner magnetic core 204 lower flange 2043 approximately, makes inner magnetic core 204 when mounted, and the lower flange 2043 of inner magnetic core 204 can be slided in accommodation space 2083 and accommodated said inner magnetic core 204.Relatively, the external diameter of the upper flange part 2042 then internal diameter than ccontaining space 2083 is big, makes upper flange part 2042 can't get into accommodation space 2083 and is placed on the opening 2084 of accommodation space 2083.
With reference to shown in Figure 6, outer magnetic core 208 has first surface 2085, and said first surface 2085 is through making up to be placed on the circuit board.Have two electrode setting areas 2086 that are oppositely arranged on the first surface 2085, can be formed for the electrode of the electric contact of connecting circuit plate on the electrode setting area 2086.In the present embodiment, two electrode setting areas 2086 that are oppositely arranged place two relative chamfering 2082 places of outer magnetic core 208, and each electrode setting area 2086 extends to the edge of the opening 2086 of accommodation space 2083 from the edge of chamfering 2082.
With reference to Fig. 3 to Fig. 5, outer magnetic core 208 has second surface 2087 in addition, and itself and said first surface 2085 are established relatively.On second surface 2087, correspond to the position of electrode setting area 2086, can be provided with protuberance 2088 individually, said protuberance 2088 is reeled through being provided for said spiral terminal part 210, and spiral terminal part 210 can be fixed on the protuberance 2088.If with protuberance 2088 and correspond between the electrode on the electrode setting area 2086 to form and conduct, just can spiral terminal part 210 reel with accomplish welding after, operate said inductance device 200.In the present embodiment, each said protuberance 2088 is arranged on the outer edge of second surface 2087.
In particular, on second surface 2087, correspond to 2086 places, electrode setting area and can form depressed part 2089 respectively, and each depressed part 2089 is equipped with protuberance 2088, and 2088 of each protuberances are formed on respectively and accordingly on the bottom surface of said depressed part 2089.In the present embodiment, each protuberance 2088 is arranged on the outer edge of depressed part 2089.The width that depressed part 2089 tools are certain makes protuberance 2088 apart from the both sides of the edge of depressed part 2,089 one section enough distance arranged, and so can let spiral terminal part 210 can have no to be wound on the protuberance 2088 difficultly.
In addition, has the opening 2084 of accommodation space 2083 on the second surface 2087, on second surface 2087, correspond to 2086 places, electrode setting area and can form depressed part 2089 respectively.In the present embodiment, each depressed part 2089 places the relative chamfering of two of outer magnetic core 208 2082 places respectively, and each depressed part 2089 extends to the edge of the opening 2084 of accommodation space 2083 from the edge at chamfering 2082 places.Each depressed part 2089 is equipped with protuberance 2088, and 2088 of each protuberances protrude out from the bottom surface and the outer edge thereof of said depressed part 2089 respectively and accordingly.Therefore each depressed part 2089 extends to the edge of the opening 2084 of accommodation space 2083, can reserve the passage that the spiral terminal part 210 of sening as an envoy to can traverse to protuberance 2088 in the accommodation space 2083, to help the coiling of spiral terminal part 210.
To Fig. 6, outer magnetic core 208 can more comprise conductive layer 2090 with reference to Fig. 3, and conductive layer 2090 is formed on electrode setting area 2086 and extends on the outer surface of electrode setting area 2086 corresponding protuberances 2088.In detail, conductive layer 2090 can be formed on all side surfaces of the outer magnetic core 208 between outer surface, the electrode setting area 2086 on the first surface 2085 and each protuberance 2088 and the electrode setting area 2086 of protuberance 2088.The partially conductive layer 2090 that is formed on the electrode setting area 2086 on the first surface 2085 can be used as the electrode of the electric contact on the connecting circuit plate; And be formed on the conductive layer 2090 of the outer surface of each protuberance 2088; And outside on all side surfaces of magnetic core 208; Be formed on the conductive layer 2090 between each protuberance 2088 electrode setting area 2086 corresponding, then can make the spiral terminal part 210 that is wrapped on the protuberance 2088 be electrically connected to circuit board with it.The present invention utilizes the electrode of conductive layer 2090 as the connecting circuit plate, therefore has good evenness.Compare with the aforementioned conventional inductance device; Because spiral terminal part 210 does not extend to the electrode of joining with circuit board; Make the surface of electrode setting area 2086 can keep its original flat degree; So can exempt the protuberance problem of traditional electrical induction device, make the lifting of technology yield and let inductance device install more firm.There is this excellent result to be the design of protuberance 2088, with due to cooperating between conductive layer 2090 and the protuberance 2088.In one embodiment, conductive layer 2090 can be silver-colored film, and the method for plating capable of using of silver-colored film or vapor deposition forms.Conductive layer 2090 materials are not limited to silver, other as: zinc or nickel etc. also can become the material of conductive layer 2090.
In addition, the spiral terminal part 210 that is wound on the protuberance 2088 can be fixed on the protuberance 2088 through wicking technology, and formation conducts.Since the spiral terminal part 210 of reeling be exposed to outer and many circles closely around; Make to have narrow and small slit between it, help to produce the capillary strength that attracts scolding tin, therefore; Spiral terminal part 210 is when welding; Outer magnetic core 208 soak put the degree of depth can be less than the traditional capacitance device, therefore reduce outer magnetic core 208 widely and produce the risk of breaking or taking place secretly to split, so can improve yield significantly.
With reference to Fig. 2 and Fig. 3, fillet 2081 places of magnetic core 208 outside, at second surface 2087 upper process protuberances 2092, protuberance 2092 extends a segment distance along fillet 2081 profiles of outer magnetic core 208 and past fillet 2081 both sides and is convexly equipped with.In addition, chamfering 2082 places with respect to said fillet 2081 also are provided with protuberance 2094, and protuberance 2094 is convexly set in chamfering 2082 and extends a segment distance toward chamfering 2082 both sides.Protuberance 2092 all has elongate in shape with protuberance 2094, makes upper flange part 2042 be placed on 2087 last times of second surface, and upper flange part 2042 can be between protuberance 2092 and protuberance 2094.
With reference to Fig. 3 and shown in Figure 7, protuberance 2088 is outstanding from its corresponding depressed part 2089, the overhead height H of protuberance 2088
2Can be greater than the depth H of depressed part 2089
1, making when upper flange part 2042 and be placed on 2087 last times of second surface, the top of protuberance 2088 can reach the outer edge side of upper flange part 2042.The end face of protuberance 2092 and protuberance 2094 is apart from the height H of the bottom surface of depressed part 2089
3Then can be greater than the overhead height H of protuberance 2088
2, protuberance 2088 can be protected.
In the above-mentioned enforcement aspect, the material of outer magnetic core 208 can be nickel based ferrite, manganese based ferrite, silicon steel plate, Sendust or beryllium Mo alloy etc.
In addition, in the above-mentioned enforcement aspect, inner magnetic core 204 is a drum-shaped magnetic core, but is not limited thereto, and it can be bar-shaped, T magnetic core or LP magnetic core, also can be end magnetic core and be looped around inner magnetic core 204 outer drum-shaped magnetic cores.
In sum; The outer magnetic core that the present invention discloses has the protuberance on the opposite face that is located at least one electrode setting area on the first surface and is located at said first surface; Conductive layer is formed on the electrode setting area and extends to protuberance; Make after the spiral terminal part is wound in protuberance, spiral can be electrically connected to the electrode on the electrode setting area.Compare with the inductance device of convention, make and need not prepare groove on the electrode setting area accommodating the spiral terminal part owing to the spiral terminal part is wound in protuberance, the electrode that therefore is formed on the electrode setting area can be very smooth.Therefore the spiral distal portion that is wound in protuberance can reduce the wicking degree of depth in the side of outer magnetic core.And the spiral terminal part of reeling can help adhering to of scolding tin, so can shorten the weld time of spiral terminal part, greatly reduces raising technology yield and let outer magnetic core produce the risk of breaking or secretly splitting.The shortening of the weld time of spiral terminal part also can make conductive layer in when welding, is difficult for being damaged, and can more guarantees the quality of the electric connection between the electrode of spiral and connecting circuit plate.
Technology contents of the present invention and technical characterstic disclose as above, yet the those skilled in the art still maybe be based on teaching of the present invention and announcement and done all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to the content that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by above claims.
Claims (20)
1. magnetic core, it is characterized in that through making up to be installed on the circuit board and to accommodate the coiling spiral with at least one spiral terminal part said magnetic core comprises:
First surface has at least one electrode setting area, and said at least one electrode setting area is used to be provided with the electrode that is electrically connected at said circuit board;
Second surface is with respect to said first surface setting;
At least one protuberance is formed on the said second surface with said at least one electrode setting area accordingly, and said at least one protuberance is reeled through being provided for said spiral terminal part; And
Conductive layer is formed on said at least one electrode setting area, and extends to the outer surface of said at least one protuberance.
2. magnetic core as claimed in claim 1; It is characterized in that wherein said second surface more comprises at least one depressed part; Wherein said at least one depressed part and said at least one electrode setting area are provided with and extend to the outward flange of said second surface accordingly, and said at least one protuberance and said at least one electrode setting area are provided with and are formed on the bottom surface of said at least one depressed part accordingly.
3. magnetic core as claimed in claim 2 is characterized in that wherein said at least one protuberance is close to the outward flange of said at least one depressed part.
4. magnetic core as claimed in claim 3 is characterized in that it more comprises accommodation space, and it is used to accommodate said coiling spiral, and said accommodation space comprises opening, and said opening is located at said second surface, and wherein said depressed part extends to the edge of said opening.
5. magnetic core as claimed in claim 4; It is characterized in that wherein said at least one depressed part comprises two depressed parts; And said second surface is the quadrangle with two first and second chamferings that are oppositely arranged, and wherein said two depressed parts are located at said first chamfering and the said second chamfering place respectively.
6. magnetic core as claimed in claim 5 is characterized in that each said protuberance wherein is higher than the degree of depth of each said depressed part.
7. magnetic core as claimed in claim 6; It is characterized in that it more comprises first protuberance and second protuberance; And said second surface more comprises the 3rd chamfering and the fillet that is oppositely arranged; Wherein said first protuberance is convexly equipped with at said second surface along the profile of said the 3rd chamfering, and the profile of the said fillet in said second protuberance edge is convexly equipped with at said second surface.
8. magnetic core as claimed in claim 7 is characterized in that the top of each said protuberance wherein is lower than the end face of said first protuberance and said second protuberance.
9. inductance device, it is characterized in that comprising through making up to be installed on the circuit board:
Inner magnetic core;
Spiral is wound in said inner magnetic core, and said spiral has at least one spiral terminal part; And
Outer magnetic core, its internal configurations have said inner magnetic core and the said spiral that is wound in said inner magnetic core, and said outer magnetic core comprises:
First surface has at least one electrode setting area, and said at least one electrode setting area is used to be provided with the electrode that is electrically connected at said circuit board;
Second surface is with respect to said first surface setting;
At least one protuberance is formed on the said second surface with said at least one electrode setting area accordingly, and said at least one protuberance is reeled through being provided for said spiral terminal part; And
At least one conductive layer is formed on said at least one electrode setting area, and extends to the outer surface of said at least one protuberance.
10. inductance device as claimed in claim 9; It is characterized in that wherein said second surface more comprises at least one depressed part; Wherein said at least one depressed part and said at least one electrode setting area are provided with and extend to the outward flange of said second surface accordingly, and said at least one protuberance and said at least one electrode setting area are provided with and are formed on the bottom surface of said at least one depressed part accordingly.
11. inductance device as claimed in claim 10 is characterized in that wherein said at least one protuberance is close to the outward flange of said at least one depressed part.
12. inductance device as claimed in claim 11; It is characterized in that wherein said outer magnetic core more comprises accommodation space, it is used to accommodate said coiling spiral, and said accommodation space comprises opening; Said opening is located at said second surface, and wherein said depressed part extends to the edge of said opening.
13. inductance device as claimed in claim 12; It is characterized in that wherein said at least one depressed part comprises two depressed parts; And said second surface is the quadrangle with two first and second chamferings that are oppositely arranged, and wherein said two depressed parts are located at said first chamfering and the said second chamfering place respectively.
14. inductance device as claimed in claim 13 is characterized in that each said protuberance wherein is higher than the degree of depth of each said depressed part.
15. inductance device as claimed in claim 14; It is characterized in that wherein said outer magnetic core more comprises first protuberance and second protuberance; And said second surface more comprises the 3rd chamfering and the fillet that is oppositely arranged; Wherein said first protuberance is convexly equipped with at said second surface along the profile of said the 3rd chamfering, and the profile of the said fillet in said second protuberance edge is convexly equipped with at said second surface.
16. inductance device as claimed in claim 15 is characterized in that the top of each said protuberance wherein is lower than the end face of said first protuberance and said second protuberance.
17. inductance device as claimed in claim 16; It is characterized in that wherein said inner magnetic core is a drum-shaped magnetic core; Said drum-shaped magnetic core has upper flange part and lower flange; Wherein when said lower flange is housed in the said accommodation space, and said upper flange part places between said second surface and said first protuberance and second protuberance.
18. inductance device as claimed in claim 17 is characterized in that wherein said outer magnetic core is a toroidal core.
19. inductance device as claimed in claim 18, the material that it is characterized in that wherein said inner magnetic core are manganese based ferrite, nickel based ferrite, silicon steel plate, Sendust or beryllium Mo alloy.
20. inductance device as claimed in claim 19 is characterized in that the material of wherein said outer magnetic core can be nickel based ferrite, manganese based ferrite, silicon steel plate, Sendust or beryllium Mo alloy etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101589671A CN101950653B (en) | 2009-07-10 | 2009-07-10 | Inductance device and magnetic core thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101589671A CN101950653B (en) | 2009-07-10 | 2009-07-10 | Inductance device and magnetic core thereof |
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| Publication Number | Publication Date |
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| CN101950653A CN101950653A (en) | 2011-01-19 |
| CN101950653B true CN101950653B (en) | 2012-06-27 |
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| CN2009101589671A Expired - Fee Related CN101950653B (en) | 2009-07-10 | 2009-07-10 | Inductance device and magnetic core thereof |
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| JP6912980B2 (en) * | 2017-09-07 | 2021-08-04 | Ntn株式会社 | Inductor |
| US11424070B2 (en) * | 2018-06-19 | 2022-08-23 | Tdk Corporation | Coil component |
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