CN1702784A - Coil device - Google Patents
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- CN1702784A CN1702784A CN 200510073794 CN200510073794A CN1702784A CN 1702784 A CN1702784 A CN 1702784A CN 200510073794 CN200510073794 CN 200510073794 CN 200510073794 A CN200510073794 A CN 200510073794A CN 1702784 A CN1702784 A CN 1702784A
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Abstract
A core includes a winding part, a base junction face, and a terminal junction face; and a coil is wound around the winding part. The base comprises synthetic resin, and includes a core junction and a terminal coupling part. A terminal consists of a metal plate, and includes a core junction and a coil connection, and is coupled with the base via a terminal coupling part formed on the base. The core junction formed on the base and the core junction formed at the terminal are respectively face-contacted with and bonded to the base junction face of the core and the terminal junction face of the core. The coil is connected to the coil connection formed at the terminal. So this invention can provide a coil device high in terminal bonding strength and excellent in heat radiation performance.
Description
Technical field
The present invention relates to a kind of coil device, especially refer to a kind ofly be applicable to that use is at small-sized, the low thickness type inductor of surface apparatus type and the coil device on the transformer.
Background technology
In recent years, e-machine develops towards miniaturization, slimming, and with respect to the element that is arranged on these machines, also is required to want miniaturization, low thicknessization.Be arranged on the coil device of inductor on the circuit substrate of e-machine and transformer etc., generally be on the plastic base station that is provided with external connection terminals, the core that assembling is wound with spiral constitutes, with regard to the coil device that does not have withstand voltage regulation, its method corresponding to the requirement of miniaturization, low thicknessization mainly is to use solid directly metal terminal is followed on core.
But, use solid directly with metal terminal then on core the time, because core is the sintered body of ferrous salt etc., so be difficult for obtaining the high intensity of following.That is to say that general metal terminal uses the metal material of phosphor bronze, copper alloy, iron etc. more, prevent to corrode and the material loading of scolder, can be electroplate with metals such as gold, silver or tin in that its surface is many in order to ensure terminal.Its surface smoothness height of terminal after the plating, and this high smoothness will reduce the then intensity of metal terminal.Moreover at the metal terminal of the electrodeposited coating that is formed with zinc-plated or scolder plating etc., its temperature when attached solder can cause the softening or dissolving of electrodeposited coating, and it is softening to make that the solid face also produces, and the result will cause the then intensity of metal terminal to reduce more.And this problem makes problem more serious because employed lead-free solder causes the temperature of solder attachment to rise in recent years.Just there is the then conception of intensity of many lifting cores and metal terminal to be carried out proposition for this reason.
For example, in patent documentation 1 (Japanese kokai publication hei 10-303034 communique), just disclose have with the commissure of the terminal of core on be formed with recess, plug structure and can utilize the two sides of terminal to follow in terminal that should recess is provided with solid, thus with core and the firm technology of being fixed of terminal.Disclosing in patent documentation 2 (Japanese kokai publication hei 11-8133 communique) has on the terminal surface of following part, the surface area that is provided with starlike jog and is provided with groove etc. in the bottom surface of core increases structure, even the technology that the scolder temperature also can't be peeled off core and terminal.Disclosing to have possessing in patent documentation 3 (Japanese kokai publication hei 11-283847 communique) has coating solder attachment layer the core of lead frame of outside terminal of (thickness is that the zinc-plated or scolder of 1～20 μ m is electroplated) is provided with in the portion, is provided with solder attachment and prevents that layer is to promote the then technology of intensity.In patent documentation 4 (Japanese kokai publication hei 2003-347131 communique), disclose to have this metal terminal to possess to have the flange that the periphery of portion erects up is set, core is provided with portion and flange and core follows the technology of following intensity that promotes by core.
But therefore the processing that above-mentioned technology all needs to carry out metal terminal and core shape have the problem that causes cost to rise to promote then intensity.And, not improving material itself the bad then intensity basically of the core that constitutes by ferrous salt and metal terminal, its lifting of following intensity is also limited.
In addition, the miniaturization of element, the development of slimming make the radiating surface of coil device also have problems, and that is to say, when the caloric value components identical was merely carried out miniaturization, its external surface area also dwindled natch, therefore can reduce thermal diffusivity.So when the design lines coil apparatus, must consider the control of heating and the lifting of thermal diffusivity simultaneously.
Summary of the invention
Main purpose of the present invention is to overcome the deficiencies in the prior art and defective, provides a kind of the improvement when core and metal terminal are followed to be knotted the abominable problem of intensity, makes the terminal of coil device integral body follow the coil device of strength enhancing.
Another purpose of the present invention is to provide a kind of coil device of thermal diffusivity excellence.
For reaching above-mentioned purpose, the invention provides a kind of coil device, include core, coil, base station and terminal.Aforementioned core includes spiral portion, base station composition surface and terminal composition surface, is wound with coil in this spiral portion; Aforementioned base station is made of synthetic resin, and it includes core junction surface and terminal joint portion; Aforementioned terminal is made of metallic plate, and it includes core junction surface and coil connecting portion, and combines with this base station by the terminal joint portion that is formed on the aforementioned base station; Be formed at the core junction surface on the aforementioned base station and be formed on core junction surface on this terminal that in addition face is then with this base station composition surface of aforementioned core and this terminal composition surface respectively; Aforementioned coil is connected with coil connecting portion on being formed on aforementioned terminal.
With regard to above-mentioned coil device, its base station is made of synthetic resin, and includes core junction surface and terminal joint portion.This synthetic resin is equivalent to following by solid and core, because the range of choice of solid and synthetic resin material is bigger, utilize the combination suitably select synthetic resin material and solid, can obtain the bigger intensity of following when alloy and metal are followed.
Aforementioned terminal is made of metallic plate, and it includes core junction surface and coil connecting portion, and combines with this base station by the terminal joint portion that is formed on the aforementioned base station.Be formed at the core junction surface on this base station and be formed on core junction surface on this terminal that in addition face is then with this base station composition surface of aforementioned core and this terminal composition surface respectively.Pass through said structure, be formed at the core junction surface on the terminal, it is followed the low metallic terminal of intensity with respect to core and is combined with the synthetic resin system base station that then intensity is high, allow the core junction surface that is formed on the base station together follow on core, by coil device on the whole, to follow intensity higher for its terminal.
With regard to above-mentioned coil device, this coil is connected with coil connecting portion on being formed on aforementioned terminal.In addition face is then on the terminal composition surface of this terminal and core.Can promote the heat dispersion of coil device effectively by above-mentioned structure.At the heat that coil device produced, be because the caused heating of copper loss of coil and the vortex flow loss and the caused heating of iron loss of core, these heats can dispel the heat via the terminal that contacts with the core face, and are dispelled the heat via coil connecting portion and terminal by coil.Therefore, as long as just consider the surface area of the sectional area of termination contact area with respect to core, terminal and terminal and set the caloric value of coil device and can promote heat dispersion.
So the bad then intensity when the present invention can utilize synthetic resin to improve between core and metal terminal then makes the terminal of coil device integral body follow intensity and improves, so the coil device of heat dispersion excellence can be provided.Particularly, the position that combines with terminal joint portion institute on being formed at this base station of this terminal forms perforation.If bury the synthetic resin of this terminal joint portion underground in this perforation, just can be so that terminal is more firm with combining of base station, and make the strength enhancing of following of core and terminal.
Though the core junction surface that is formed on the terminal is big more with respect to the face contact area of core, promote helpful more for heat dispersion, but when too big, will make the core junction surface that is formed on the base station diminish with respect to the face contact area of core, in addition, also can make that the interval between the adjacent terminal narrows down.In case the interval between the terminal narrows down, the life-span of employed lead frame mould just can produce harmful effect during for the manufacturing terminal, moreover, with the coil device actual installation on circuit substrate the time, be easy to generate interconnecting between scolder (being called solder bridging), cause the problem of defective insulation to take place.Therefore, the terminal intervals between adjacent is preferably and is arranged on more than the 0.5mm, and better person guarantees more than 1mm.
Being formed on core junction surface on the base station, to follow intensity with respect to the big more then terminal of face contact area of core just high more.For this reason, the base station composition surface of core in fact preferably just with respect in the adjacent terminal intervals, has the length more than 1/4 of intermarginal size outside this by the subtend outer rim of this core respectively towards center position.Above-mentioned all is necessity settings of following intensity and heat dispersion corresponding to terminal.
Other purpose of the present invention, structure and advantage are carried out more detailed explanation just with reference to accompanying drawing.But, the appended graphic embodiment that only represents merely.
As mentioned above, can obtain following effect by the present invention:
(A) can provide the terminal of coil device integral body is followed the coil device that intensity is promoted.
(B) can provide the coil device of heat dispersion excellence.
Description of drawings
Fig. 1 is the stereogram of coil device embodiment of the present invention;
Fig. 2 is the three-dimensional exploded view of coil device shown in Figure 1;
Fig. 3 is the cutaway view of the user mode embodiment of coil device shown in Figure 1;
Fig. 4 is the stereogram of another embodiment of coil device of the present invention;
Fig. 5 is the bottom view of coil device shown in Figure 4;
Fig. 6 is the three-dimensional exploded view of coil device shown in Figure 4;
Fig. 7 is the cutaway view of the user mode embodiment of coil device shown in Figure 4;
Fig. 8 is the stereogram of an embodiment again of coil device of the present invention;
Fig. 9 is the bottom view of coil device shown in Figure 8;
Figure 10 is the three-dimensional exploded view of coil device shown in Figure 8.
Symbol description among the figure
1 core
10 spiral portions
13 base station composition surfaces
14 terminal composition surfaces
2,21,22 coils
3 base stations
31,44 core junction surfaces
32 terminal joint portions
4,411,412,421,422 terminals
451 coil connecting portions
Embodiment
Figure 1 shows that the stereogram of coil device embodiment of the present invention, Figure 2 shows that the three-dimensional exploded view of coil device shown in Figure 1, Figure 3 shows that the cutaway view of the user mode embodiment of coil device shown in Figure 1.
Below just be that main body describes with Fig. 2.Coil device shown in the figure includes core 1, coil 2, base station 3 and a pair of terminal 4.
Above-mentioned core 1 is preferably the spiral portion 10 that includes, base station composition surface 13 and terminal composition surface 14, and the size of this core 1 and shape are not done any special qualification.Again, this core can also can also be used a plurality of cores are assembled the all-in-one-piece core for the core of closed magnetic circuit type or open-flux path type.Generally speaking, because spiral is easy and applicable to miniaturization, use the drum type core mostly.Therefore the material of core 1 preferably has high-insulativity owing to will assemble terminal 4 by solid.Present embodiment then is to use the drum type core 1 that sintered body constituted by ferrous salt etc.Drum type core 1 size of present embodiment, the diameter of its side plate 11,12 is about 6mm respectively, and the axial length of scroll bar 15 is about 1mm, and the overall dimensions of scroll bar 15 directions of core 1 (i.e. height shown in the figure) are about about 2mm.Spiral portion 10 is by formed space between side plate 11,12 and the scroll bar 15.13 on this base station composition surface is by set banded of the side plate 11 end faces central authorities of a side and extend to the overall region of the side 17 of this side plate 11.14 on this terminal composition surface is separately positioned on two side positions on the base station composition surface 13 of these side plate 11 end face central authorities.
Above-mentioned base station 3, for example the thermal endurance synthetic resin by liquid crystal polymer etc. is constituted, and it includes core junction surface 31 and terminal joint portion 32.This core junction surface 31 by core portion 33 is set and framework 35 is constituted.This core is provided with portion 33 and is connected with the base station composition surface 13 that is arranged on side plate 11 end faces and forms band shape, and its two ends than length direction then are connected with framework 35.35 of this frameworks are 17 whole connections of formed side and form ring-type on the side plate 11 with core 1 one sides.
Above-mentioned terminal joint portion 32 includes part that combines with the plate face of terminal 4 and the part that combines with the end face of terminal 4.The crooked joint portion 38 that includes the outside terminal joint portion 36 that combines with the outer splicing ear lead division plate face of terminal 4, the coil terminals joint portion 37 that combines with the sub-lead division plate of the coil connecting terminal of terminal 4 face and combine with the part of the plate face combination of terminal 4 with the sigmoid portion of colluding of terminal 4.Each outside terminal joint portion 36 is provided with two columned projections 361.With the part that the end face of terminal 4 combines, inwall 351, the core that includes framework 35 is provided with the sidewall 362 of the metope 331 of portion 33, outside terminal joint portion 36, the sidewall 371 of coil terminals joint portion 37 and the sidewall of crooked joint portion 38 etc.
The terminal 4 of said structure is combined with base station 3 by the terminal joint portion 32 that is formed on the base station 3.Particularly, this terminal 4 is to form continuously by lead frame institute, is combined into one by internal shaping method and base station 1.Therefore, separate shape though present with terminal 4 at base station shown in Figure 23, its reality in conjunction with the time just to be made up and do not need must be the structure of one.
Above-mentioned base station (3) is formed with terminal junction surface 32 by the internal shaping method of base station 3 and terminal 4, core is provided with portion 33 and framework 35.This terminal 4 is combined with the terminal joint portion 32 of base station 3 with end face with the plate face.
The base portion 47 of this terminal 4 is with its end face 441 and the end face at the core junction surface 33 of base station 3 and base station 3 combinations in addition that combine with the inwall of framework 35.
The core of this base station 3 is provided with portion 33 and is shaped to the 0.15mm identical with the thickness of terminal 4, and owing to its end face is bonded with each other, so the core of the base portion 47 of terminal 4 and base station 3 is provided with portion's 33 shapings at grade.
In two perforation 461 of external connection terminals portion 46 extending parts that are formed at terminal 4, be embedded with the synthetic resin of base station 3 and be formed with columned resin 361.The plate face of the extending part of this external connection terminals portion 46 combines with base station 3 on being combined in outside terminal joint portion 36.The extension end face of this outside terminal joint portion 36 and two perforation, 461 inner side end then with substrate 3 combinations that combine with the lateral surface of the sidewall 362 of outside terminal joint portion 36 and cylindric resin 361 respectively.The integrated structure of this two perforation 461 and columned resin 361 can increase the bond strength of base station 3 and terminal 4.
This colludes sigmoid portion 48 and gos deep into to base station 3, and combines with crooked joint portion 38.So structure can further promote the bond strength of base station 3 and terminal 4.
The base station 3 of combination and terminal 4 by the way, because the core of its base station 3 is provided with the core junction surface 44 of portion 33 and terminal 4 and locates at grade the position respectively, so face is carried out then to become one with core 4 with the core junction surface 44 of base portion 47 with the side of core 4 in the core junction surface 31 that can allow core that portion 33 is set.
Particularly, the core of this base station 3 is provided with portion 33 and uses solids 5 bonding with reference to the base station composition surface 13 on shown in Figure 3 and side plate 11 end faces that are formed on core 4.The framework 35 of this base station 3 utilizes the side integral body of solid 5 and the side plate 11 that is formed on core 4 in addition bonding.44 at the core junction surface of this terminal 4 is to utilize the terminal composition surface 14 on solid 5 and side plate 11 end faces that are formed on core 4 in addition bonding.This solid 5 for example can use the solid as the excellent heat resistance of epoxy system.
The base station 3 of above-mentioned coil device constitutes with synthetic resin, and it includes core junction surface 31 and terminal joint portion 32.This synthetic resin is with solid 5 and core 1 when bonding, can obtain stronger then intensity compared to the occasion of core 1 and metal pickup.
This terminal 4 is constituted with metallic plate, and it includes core junction surface 44 and coil connecting portion 451, and combines with base station 3 by the terminal joint portion 32 that is formed on the base station 3.Be formed on the core junction surface 31 on the base station 3 and be formed on core junction surface 44 on the terminal 4 that in addition face is then with the terminal terminal surface 14 of the base station composition surface 13 of core 1 and core 1 respectively.
Pass through said structure, this is formed at the core junction surface 44 on the terminal 4, can combine with the synthetic resin system base station 3 that then intensity is high with respect to the core 1 metallic terminal 4 that then intensity is low, and because the core junction surface 31 that is formed on the base station 3 is also together bonding with core 1, so by coil device on the whole, it is higher that its terminal is followed intensity.
With regard to above-mentioned coil device, this coil 2 is connected with coil connecting portion 451 on being formed on terminal 4.4 of this terminals are to follow with 14 on the terminal composition surface of core 1.Therefore, the heat that coil device produced can be dispelled the heat via the external connection terminals portion 46 of coil connecting portion 451 and terminal 4 by coil 2 by being dispelled the heat with 1 terminal that contacts 4 of core simultaneously.Therefore, set the caloric value of coil device, just can promote heat dispersion if consider the surface area of the sectional area of contact area, terminal 4 and terminal 4 with respect to the terminal 4 of core 1.
Though the core junction surface 44 that is formed on the terminal 4 is big more with respect to the face contact area of core 1, then can promote heat dispersion, but it is in case excessive, can make the core junction surface 31 be formed on the base station 3 diminish, make the interval at 44 at core junction surface of terminals of adjacent 4 narrow down with respect to the face contact area of core 1.In case the interval of terminal narrows down, just there is bad influence in the life-span of the lead frame mould during for the manufacturing terminal.Moreover, when reality is assembled in coil device on the circuit substrate, is easy to generate scolder and links, cause the problem of defective insulation to take place.For this reason, the interval at 44 at the core junction surface of the terminals of adjacent 4 of present embodiment is set in about 1mm.
The core junction surface 31 that is formed on base station 3 is big more with respect to the face contact area of core 1, and then the then intensity of terminal is high more.For this reason, the base station composition surface 13 of the core 1 of present embodiment with regard to 14 on the terminal composition surface of core 1 adjacency, is formed in the outer peripheral edges overall region with respect to core 1.
The present invention can improve core and the metal terminal then problem of undercapacity then the time by the setting of synthetic resin, makes the terminal of coil device integral body follow the intensity raising, and the coil device with splendid heat dispersion can be provided.
As shown in Figure 3, the coil device of present embodiment is inserted with core 1 on the breach 62 that is arranged on the circuit substrate 6, and utilizes scolder 67 that terminal 4 is connected on the circuit patterns 64 to be assembled on the circuit substrate 6.Such assembling kenel, though have the advantage that the element heights that makes on the circuit substrate 6 reduces, but when coil device is subjected to the external force of arrow A direction, owing to have breach on the circuit substrate 6, the intensity of this circuit substrate 6 can't stop this external force, cause the core 1 and the then place of terminal 4 to bear the powerful external force of peeling off, but because the coil device of present embodiment is the side 17 that the framework 35 of ring-type is followed at the side plate 11 of core 1, make the present invention can utilize the structural strength of framework 35 to resist external force, therefore have the terminal 4 difficult effects of peeling off.
Figure 4 shows that the stereogram of another embodiment of coil device of the present invention, Fig. 5 then is the bottom view of coil device shown in Figure 4, Fig. 6 then is the three-dimensional exploded view of coil device shown in Figure 4, its expression is watched the state of core by the bottom, and Fig. 7 then is the cutaway view of the user mode embodiment of coil device shown in Figure 4.
Below, just describe with Fig. 6 master.Coil device shown in the figure includes core 1, a plurality of coil 21,22, base station 3 and a plurality of terminal 411,412,421,422, has the transformer of 4 terminals with formation.
This core 1 has identical drum type core with Fig. 1 to core 1 shown in Figure 3, and the end face central authorities of its side plate 11,12 up and down are provided with the island protuberance 111,121 of flat.This island protuberance 111,121 forms circle, is formed with segment difference section 112,122 to be connected with the end face periphery 110,120 of side plate 11,12 around it.This island protuberance 111,121 can enlarge the volume of core 1, with the electrical characteristic that promotes core 1 and increase mechanical strength, makes the thickness of coil device reduce.The height dimension of the segment difference section 112 of this island protuberance 111121 is set in below the gauge of terminal 4.
This core 1 and Fig. 1 core 1 extremely shown in Figure 3 has base station composition surface 13 and terminal composition surface 14 equally.This base station composition surface 13 is formed on the position of side perimeters 110 8 five equilibriums that are separated into of the side plate 11 of a side, comprises the overall region of the side 17 of this side plate 11 according to the interval mode setting.This terminal composition surface 14 is separately positioned on the adjacent both sides on the base station composition surface 13 on the end face periphery 110 that is formed at side plate 11.In addition, other position of core 1 and Fig. 1 have identical structure to core 1 shown in Figure 3, just omit the explanation of its repetition at this.
This plural coil 21,22 includes first coil 21 and second coil 22 that constitutes transformer, and it is wound on respectively on the spiral portion 10.
This base station 3 and Fig. 1 base station 3 extremely shown in Figure 3 includes core junction surface 31 and terminal joint portion 32 equally.This core junction surface 31 includes core portion 33 and framework 35 is set.Side 17 whole joints on this framework 35 and the side plate 11 that is formed at core 1 and form circulus.This core be provided with 33 in portion respectively be formed at side plate 11 sides on base station composition surface 13 engage, and extended by framework 35 and to make the one end be connected with framework 35.
This terminal joint portion 32 includes part that combines with the plate face of terminal 4 and the part that combines with the end face of terminal 4.The structure of this terminal joint portion 32 is formed at the cylindrical protrusion 36 of outside terminal joint portion 36, and except it is set to 1 corresponding to each terminal 4, it has identical structure with Fig. 1 to terminal joint portion 32 shown in Figure 3, so omit its repeat specification at this.
This plural terminal 411,412,421,422 correspond respectively to the positive and negative end of first coil 21 and second coil 22 and be provided with first side terminal 411,412 and second side terminal 421,422 to form the structure of 4 terminals.
The structure of this each terminal 411,412,421,422 is formed at the perforation 461 on the extension of external connection terminals portion 46, on this terminal, respectively be provided with one, all the other have identical structure with Fig. 1 to terminal 4 shown in Figure 3, so omit the explanation of its repetition at this.
The terminal 411,412,421,422 of present embodiment is connected with lead frame, is combined on the base station 3 with internal shaping method one.The core of this base station 3 is provided with portion 33 and forms identical 0.15mm with the thickness of terminal 411,412,421,422, and identical with terminal 4 to base station 3 shown in Figure 3 with Fig. 1.Thus, the core of the base portion 47 of the terminal 4 of present embodiment terminal 411,412,421,422 and base station 3 is provided with portion 33 and just can be on the same plane position.
Same and core 1 then is integral to coil device shown in Figure 3 for this base station that mutually combines 3 and terminal 411,412,421,422 and Fig. 1.Particularly, the core of this base station 3 is provided with portion 33 except the island protuberance 11 of the side plate 11 of core 1, and it is followed with the solid 5 and the end face periphery 110 formed base station composition surfaces 13 of side plate 11.The framework 35 of this base station 3 is followed with side 17 integral body on the side plate 11 of solid 5 and core 1.The core composition surface 44 of this terminal 411,412,421,422 is except the island protuberance 11 of the side plate 11 of core 1, and it is followed with the solid 5 and the end face periphery 110 formed terminal composition surfaces 14 of side plate 11.The height dimension of the segment difference section of island protuberance 111 is set in below the gauge of terminal 411,412,421,422.Thus, with regard to the bottom surface of coil device, this island protuberance 111 just can not given prominence to by the bottom surface of terminal 411,412,421,422 and base station 3.This island protuberance 111 can enlarge the volume of core 1, with the electrical characteristic that promotes core 1 and strengthen its mechanical strength.Thus, just can be with the side plate 11 thickness attenuation in addition of core 1.So structure can be so that coil device be reached low thicknessization.In addition, the island protuberance of core upside 121 also can be saved not because can increase the thickness of side plate 12, if the core upside does not form the island protuberance, can allow more slimming of coil device.
With regard to present embodiment, the base station composition surface 13 of this core 1 with regard to 14 on the terminal composition surface of core 1 adjacency, is set at 1/4 length of core 1 diameter dimension respectively towards the center by core 1 outer peripheral edges.
This coil 21,22 is wound in the spiral portion 10 of core 1.The end of the coil 21,22 behind the coiling is connected with the coil connecting portion 451 of terminal 411,412,421,422 respectively, and is connected with the sub-portion 45 of coil connecting terminal by the method for scolder welding.
The coil device of present embodiment is identical to coil device shown in Figure 3 with Fig. 1, the terminal of coil device integral body can be followed intensity and be promoted, and have excellent heat dispersion.Owing to be difficult for producing because the heat of scolder causes terminal 411,412,421,422 to follow the problem that intensity reduces, therefore can be as shown in Figure 7, can carry out the scolder welding by the downside of coil device, and can reduce actual via the assembling space of scolder welding assembly on circuit substrate 6, moreover, the heat that coil device produced can be dispelled the heat through the assembling pattern 64 of circuit substrate 6 by short path, so can further promote heat dispersion.
With regard to the coil device of present embodiment, the ring-type framework 35 of this base station 3 does not need to be formed on the overall region of core 1, and it also can be formed on the subregion.The downside of coil device shown in Figure 7 is when carrying out the scolder welding, its external force by the arrow A that the coil device top is applied can be resisted by the structural strength of circuit substrate 6, compared to Fig. 1 to coil device shown in Figure 3, the structural strength of its base station 3 is lower, with regard to the position that the external connection terminals portion of terminal 4 is extended, it is preferably the structure on the plate face that is combined in terminal 4.In addition, the framework 35 of this ring-type just can be assembled ringlike core as if the space of 17 of side plate 11 sides that are formed on core 1 on drum type core 1.Ringlike core will be covered around the spiral portion 10 of drum type core 1 and the side plate 11,12, make drum type core 1 be coated by ringlike core, the end of ringlike core is configured in the space of 35 of the side 17 of side plate 22 of drum type core 1 and ring-type frameworks, can constitutes closed magnetic circuit type core texture.
In addition, core of the present invention is not limited to the drum type core, can also be circular square core in addition.
Figure 8 shows that the stereogram of another embodiment of coil device of the present invention, Fig. 9 is the bottom view of coil device shown in Figure 8, and Figure 10 is the three-dimensional exploded view of coil device shown in Figure 8, and the state watched by the bottom side is represented in its core.
Coil device shown in the figure includes core 1, coil 2, base station 3 and pair of terminal 4 to constitute inductor.
This core 1 and Fig. 4 are identical and be formed with the drum type core of tool island protuberance 111,121 to core shown in Figure 71.This core 1 and Fig. 4 core 1 extremely shown in Figure 7 includes base station composition surface 13 and terminal composition surface 14 equally, because the terminal 4 of present embodiment only has a pair of, so this base station composition surface 13 is the split positions that are disposed on end face periphery 4 five equilibriums of side plate 11,14 on this terminal composition surface is the position that subtend is arranged on 13 both sides, base station composition surface.In addition, other position of core 1 and Fig. 4 have identical structure to core 1 shown in Figure 7, therefore omit the explanation of its repetition at this.
This base station 3 and Fig. 4 to Fig. 7 shown in base station 3 have identical structure, its a pair of terminal 4 is with the combination in addition of interior method of forming one.
Though this a pair of terminal 4 and Fig. 4 have identical structure to terminal 4 shown in Figure 7, it then is provided with circular-arc breach at place, subtend limit, this core composition surface 44 is except that the island protuberance 111 of core 1, then on the terminal composition surface 14 that is formed on the end face periphery 110 of side plate 11.
Other position then with Fig. 1 to Fig. 3, or Fig. 4 is identical to embodiment shown in Figure 7, so omit its repeat specification at this.
Though more than carry out detailed description of the present invention with reference to preferred embodiment, but the present invention is not limited to this, and the personage of any skilled all can be based on disclosed basic fundamental thought of the present invention and content, carry out the various variations that can expect easily, need not add explanation at this.
Claims (5)
1. a coil device is characterized in that, includes core, coil, base station and terminal, and this core includes spiral portion, base station composition surface and terminal composition surface, is wound with coil in this spiral portion;
This base station is made of synthetic resin, and it includes core junction surface and terminal joint portion;
This terminal is made of metallic plate, and it includes core junction surface and coil connecting portion, and combines with this base station by the terminal joint portion that is formed on the aforementioned base station;
Be formed at the core junction surface on this base station and be formed on core junction surface on this terminal that in addition face is then with this base station composition surface of aforementioned core and this terminal composition surface respectively;
This coil is connected with coil connecting portion on being formed on aforementioned terminal.
2. coil device as claimed in claim 1, wherein, the position that this terminal combines with terminal joint portion institute on being formed at this base station forms perforation, and the synthetic resin of this terminal joint portion is buried in this perforation underground.
3. coil device as claimed in claim 1 or 2, wherein, this core is the drum type core, this base station composition surface is formed at the side plate end face of this drum type core one side and the side plate side of this drum type core one side;
This terminal composition surface then is the side plate end face that is formed at this drum type core one side.
4. coil device as claimed in claim 3, wherein, the side plate end face central authorities of this drum type core form the island protuberance of flat, and this island protuberance is connected with the periphery of side plate end face to be formed at the segment difference section of going up on every side;
The height dimension of the segment difference section of this island protuberance is set in below the terminal thickness size;
This base station composition surface is formed at the periphery of side plate end face of this drum type core one side and the side plate side of this drum type core one side;
This terminal composition surface then is the periphery that is formed at the side plate end face of this drum type core one side.
5. coil device as claimed in claim 4, wherein, this is formed at the base station composition surface between the terminal composition surface of core, has the length more than 1/4 of intermarginal size outside this by the subtend outer rim of this core respectively towards center position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004154540A JP2005340342A (en) | 2004-05-25 | 2004-05-25 | Coil device |
| JP2004154540 | 2004-05-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1702784A true CN1702784A (en) | 2005-11-30 |
| CN100341080C CN100341080C (en) | 2007-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100737945A Expired - Fee Related CN100341080C (en) | 2004-05-25 | 2005-05-24 | Coil device |
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| Country | Link |
|---|---|
| JP (1) | JP2005340342A (en) |
| CN (1) | CN100341080C (en) |
| TW (1) | TWI254325B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008868A (en) * | 2014-05-04 | 2014-08-27 | 太尼电电子科技（东莞）有限公司 | Chip inductor of open magnetic circuit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101254322B1 (en) * | 2011-08-31 | 2013-04-12 | (주)다코웰 | In-board type inductor and method for assembling the same |
| TWI758228B (en) | 2020-12-09 | 2022-03-11 | 奇力新電子股份有限公司 | Inductor and power module |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW239216B (en) * | 1993-05-31 | 1995-01-21 | Tokiin Corp | |
| JP3369075B2 (en) * | 1997-04-30 | 2003-01-20 | 東京パーツ工業株式会社 | Surface mount coil |
| CN2341329Y (en) * | 1997-05-29 | 1999-09-29 | 林敬仁 | Fixer for deflection coil of kinescope |
| CN2360933Y (en) * | 1999-01-08 | 2000-01-26 | 咏腾企业有限公司 | Improved rotary coil fixed rack |
| JP4259020B2 (en) * | 2002-01-28 | 2009-04-30 | ミツミ電機株式会社 | Inductance element and manufacturing method thereof |
| JP2003347131A (en) * | 2002-05-23 | 2003-12-05 | Tdk Corp | Coil device and lead frame |
-
2004
- 2004-05-25 JP JP2004154540A patent/JP2005340342A/en active Pending
-
2005
- 2005-05-19 TW TW94116339A patent/TWI254325B/en not_active IP Right Cessation
- 2005-05-24 CN CNB2005100737945A patent/CN100341080C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008868A (en) * | 2014-05-04 | 2014-08-27 | 太尼电电子科技（东莞）有限公司 | Chip inductor of open magnetic circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005340342A (en) | 2005-12-08 |
| CN100341080C (en) | 2007-10-03 |
| TWI254325B (en) | 2006-05-01 |
| TW200539198A (en) | 2005-12-01 |
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