CN1957430A - Inductor - Google Patents
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- CN1957430A CN1957430A CNA2005800169610A CN200580016961A CN1957430A CN 1957430 A CN1957430 A CN 1957430A CN A2005800169610 A CNA2005800169610 A CN A2005800169610A CN 200580016961 A CN200580016961 A CN 200580016961A CN 1957430 A CN1957430 A CN 1957430A
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- inductor
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 86
- 239000008358 core component Substances 0.000 claims description 60
- 239000000306 component Substances 0.000 claims description 29
- 210000000078 claw Anatomy 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 11
- 238000009795 derivation Methods 0.000 claims description 10
- 230000004907 flux Effects 0.000 abstract description 11
- 238000004804 winding Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 description 29
- 238000003466 welding Methods 0.000 description 25
- 238000010586 diagram Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/043—Fixed inductances of the signal type with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/10—Connecting leads to windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
An inductor whose width can be reduced and in which magnetic flux leakage can be reduced. An inductor has a first core member (20) having a winding shaft (21) and a winding wire (40) wound on the outer peripheral surface of the winding shaft (21). Further, the inductor has a second core member (30) and a terminal member (50). The second core member (30) has an inner tube section (31) surrounded by a peripheral wall (30a), and in the inner tube section (31) is placed the first core member (20). The terminal member (50) is positioned on the outer peripheral surface of the second core member (30), has an outer peripheral terminal (52) to which a terminal (41) of the winding wire (40) is joined, and has a flat terminal (51) projecting from one end surface of the second core member (30) and mounted on a mounting portion. A gap section (37) in which the terminal (41) is inserted is provided between the outer peripheral surface of the peripheral wall (32a) and the outer peripheral terminal (52). The terminal (41) is joined to the outer peripheral terminal (52) in the gap section (37).
Description
Technical field
What the present invention relates to is the inductor that is applicable on the various electronic instruments.
Background technology
In recent years, in order to satisfy the packaging density that improves circuit board, the requirement that makes the electronic instrument miniaturization, require the miniaturization and the slimming of inductor.A kind of known having as existing inductor is wound in coil on the drum-shaped magnetic core, with near and the inductor of toroidal core is set with respect to the state of this drum-shaped magnetic core.
This inductor mainly contains following three types.As first type, from the gap portion between drum-shaped magnetic core and the toroidal core spiral end is derived to foreign side, and this end is engaged on the terminal component that is installed in the toroidal core outer peripheral face.In addition, as second type, inductor shown in Figure 6 is arranged.The inductor of this type is provided with recess 2 on toroidal core 1, and makes terminal 3 to derive to foreign side from this recess 2, and this end 3 is engaged on the terminal component of the outer peripheral face that is installed in toroidal core 1 (omitting diagram).And then, as the third type, make Shu Duanzi outstanding to foreign side, coil end is wound on this Shu Duanzi, simultaneously, on this winding part, weld.
In addition, disclose in patent documentation 1, Shu Duanzi is not set, coil end is by the formation of solder joints on the terminal component with the planar section that is installed on circuit board.
Patent documentation 1: the spy opens 2003-109823 communique (with reference to the 0035th section, Fig. 3, Fig. 4 and Fig. 9)
Summary of the invention
Invent problem to be solved
Yet, in first type above-mentioned inductor, weld at the outer peripheral face that is positioned at the terminal component of outside diameter with respect to toroidal core.Therefore, more side-prominent because of the built-up welding part that welding produces to external diameter than the outer peripheral face of terminal component, can hinder the attenuating of width dimensions.
In addition, in second type inductor as shown in Figure 6, the aperture area of recess 2 is big, is sewed by the magnetic flux of this recess 2 to become big.Thus, exist the problem of the magnetic field intensity reduction of inductor.And then, in the inductor of the third type, need the unnecessary size of this bundle terminal part with Shu Duanzi.Therefore, the attenuating of width dimensions also becomes difficult in the inductor of the type.
At this, consider from the side of miniaturization, as patent documentation 1 disclosed inductor, be good so that Shu Duanzi not to be set.Yet, in patent documentation 1 disclosed formation, so that the state that end portion is partly extended to the perimeter walls of terminal component should engage by end by welding.Therefore, only give prominence to the built-up welding portion part that produces because of welding, can hinder the attenuating of width dimensions to foreign side.
In addition, in patent documentation 1 disclosed inductor, the shape of corresponding slot part makes the terminal component bending.That is to say that in the formation of patent documentation 1, terminal component is set up with the state around slot part, can not embed from the outside.Therefore, increase the man-hour that exists sweep, the problem of cost cost.And then, in patent documentation 1 disclosed formation, beyond the bonding part in terminal component, that be connected with coil end, be provided with the fixedly installation portion of usefulness.Therefore, form the slot part of installation portion part on the toroidal core redundantly, correspondingly increase magnetic flux and sew, also exist the problem of the magnetic field intensity reduction of inductor.
The present invention is based on above-mentioned condition and carries out, and it is a kind of that its purpose is to provide, and can seek the attenuating of width dimensions, simultaneously, can seek the inductor of the attenuating that magnetic flux sews.
Solve the means of problem
In order to solve above-mentioned problem, inductor of the present invention is provided with: first magnetic core component with spool; Be wound in the coil of spool outer peripheral face; Have the axle bush portion that is centered on by perisporium (wall that impales) all around and make first magnetic core component be disposed at second magnetic core component of this axle bush portion; And the outer peripheral face that is positioned at second magnetic core component, simultaneously, have and make periphery terminal that coil end engages and more outstanding and be installed on the terminal component of the plane terminal of installation position than an end face of second magnetic core component; Between the outer peripheral face of perisporium and periphery terminal, be provided with and be used to clearance portion that end is entered, simultaneously, terminally in this clearance portion, engage with the periphery terminal.
Under situation about constituting like this, the clearance portion of coil end between perisporium outer peripheral face that is present in second magnetic core component and periphery terminal, and at this clearance portion interior loop end and periphery terminal joint.Like this, because the bonding part between end and the periphery terminal is present in clearance portion, therefore follow the built-up welding part of this joint also to be present in this clearance portion.Thus, can prevent that the built-up welding part is side-prominent to the outer peripheral face of periphery terminal.Therefore, compare in the engaged formation of outer peripheral face side of periphery terminal,, the width dimensions of inductor is lowered because the built-up welding part is not present in outer peripheral face with end.In addition, compare,, the width dimensions of inductor is lowered owing to there is not Shu Duanzi with the formation that coil end is wound on the side-prominent Shu Duanzi of external diameter.
In addition,, be present in position between peripheral recess and the periphery terminal, can prevent to impact being applied directly on the bonding part by the bonding part even by the impact of load from the outside.Therefore, can improve the bond strength of bonding part.In addition and since no longer need as the inductor under the prior art with Shu Duanzi, the operation of coiling coil end on Shu Duanzi, therefore can cut down the number of working processes, and can seek the reduction of cost thus.
In addition, other the invention on the basis of foregoing invention and then, clearance portion is to constitute by the peripheral recess that the outer circumference end subcovering is recessed to form the perisporium outer peripheral face of second magnetic core component.Under situation about constituting like this, clearance portion is made of the periphery terminal of peripheral recess and this peripheral recess of covering.Therefore, as if making end be positioned at clearance portion and engaging, follow the built-up welding of this joint partly to enter peripheral recess.Thus, can prevent that the built-up welding part is side-prominent to the outer peripheral face of periphery terminal.Thus, compare, the width dimensions of inductor is lowered with formation that is provided with Shu Duanzi and the terminal formation that is engaged in the outer peripheral face of periphery terminal.
In addition, other inventions on the basis of foregoing invention and then, it is whole and be set up that peripheral recess is traversed the short transverse of the second magnetic core component outer peripheral face.Under situation about constituting like this, the variation that peripheral recess can corresponding coil end length dimension.That is to say,, also can make end be positioned at peripheral recess even length dimension becomes than under the long situation of specific length endways.Therefore, no longer need to adjust tip length, the operability when engaging is improved.
And then, other inventions on basis of above-mentioned each invention and then, the side's side along the outer peripheral face short transverse of second magnetic core component of peripheral recess is open to the outside.Under situation about constituting like this, can be from the joint operation of the open part in outside being welded etc.Therefore, operability become good in, can be by the engagement state of outside identification welding etc.
In addition, other the invention above-mentioned each the invention basis on and then, first magnetic core component is provided with at least one flange part that comprises upper flange part, upper flange part traverses its full week with respect to the other end of second magnetic core component and joins, simultaneously, the other end of second magnetic core component is provided with, and combines with the outer peripheral face of upper flange part, and carries out the locator protrusions of the location of first magnetic core component.
Under situation about constituting like this, the upper flange part of first magnetic core component traverses the full week of other end of second magnetic core component and joins.Thus, a side that exists in this other end can prevent that magnetic flux is to external leakage.In addition, by the existence of locator protrusions, first magnetic core component is positioned with respect to second magnetic core component.Therefore, the operability when making inductor is improved.
And then, other the invention on the basis of foregoing invention and then, the other end of second magnetic core component is provided with the derivation recess that more caves in than this other end, coil end is derived to peripheral recess by this derivation recess.
Under situation about constituting like this, can make coil end be positioned at the derivation recess.Therefore, compare with the situation that makes coil end be positioned at (mounting in) other end, can prevent that coil end is held between the other end of the upper flange part of first magnetic core component and second magnetic core component, and, upper flange part and other end are positively joined by the preventing of this clamping.Thus, can prevent to form the gap between upper flange part and the other end, and can prevent that producing magnetic flux by this gap sews.In addition, owing to derive coil end from deriving recess, this terminal retained part does not exist, and therefore can prevent the broken string of the coil end that the existence because of this retained part causes.
In addition, other the invention above-mentioned each the invention basis on and then, first magnetic core component is, on the axis direction both end sides of spool, be respectively equipped with the drum-shaped magnetic core of upper flange part and lower flange, simultaneously, second magnetic core component is the toroidal core that is provided with inserting hole, and drum-shaped magnetic core is inserted and led in this inserting hole.
Under situation about constituting like this, by upper flange part and the lower flange that is present in the axis direction both end sides, the location in the time of can easily carrying out the coil coiling.Therefore, the operability during the coiling coil becomes good.
And then, other the invention above-mentioned each the invention basis on and then, terminal component is provided with the fixedly claw that combines with the other end of second magnetic core component.Under situation about constituting like this, can make the installation attitude stabilizationization of terminal component to second magnetic core component.In addition, by the fixedly existence of claw, even, can prevent that also terminal component from coming off from the perimeter walls of second magnetic core component vibrating repeated loading under the environment of inductor.Thus, can be with the engagement state long term maintenance of coil end in kilter.
The invention effect
If employing the present invention then can seek the attenuating of inductor width dimensions.In addition, can seek the attenuating that the magnetic flux of inductor is sewed.
Description of drawings
Fig. 1 is the stereogram of the inductor face shaping that relates to of expression the present invention one example.
Fig. 2 is the inner stereogram that constitutes of the inductor of presentation graphs 1, is the schematic diagram of transmission drum-shaped magnetic core state.
Fig. 3 relates to the inductor of Fig. 1, is state that peristome with peripheral recess is present in vertical both ends when blocking, the inner stereogram that constitutes of expression inductor.
Fig. 4 is the schematic diagram of section of the inductor of Fig. 3, is the sectional side view of inductor.
Fig. 5 relates to the inductor of Fig. 1, is the part schematic diagram that is present in the derivation recess shapes of toroidal core, and be expression being normal with the derivation direction of coil blocks the sectional side view of state with drum-shaped magnetic core etc.
Fig. 6 is the part schematic diagram that is present in the recess shapes of the toroidal core under the prior art, and be expression being normal with the derivation direction of coil blocks the sectional side view of state with drum-shaped magnetic core etc.
Symbol description
10 ... inductor
20 ... drum-shaped magnetic core (corresponding to first magnetic core component)
21 ... spool
22 ... upper flange part (corresponding to flange part)
23 ... lower flange (corresponding to flange part)
24 ... bobbin portion
30 ... toroidal core (corresponding to second magnetic core component)
31 ... inserting hole (corresponding to axle bush portion)
34 ... protuberance (corresponding to locator protrusions)
35 ... recess is installed
36 ... peripheral recess
38 ... derive recess
40 ... coil
41 ... terminal
50 ... terminal component
51 ... the plane terminal
52 ... the periphery terminal
Best example of the present invention
Below, according to Fig. 1～Fig. 5 the inductor that the present invention's one example relates to is described.Fig. 1 is the inductor 10 whole stereograms that constitute that expression the present invention one example relates to.In addition, Fig. 2 is the expression inductor 10 inner stereograms that constitute, and expression is with the state of drum-shaped magnetic core 20 transmissions.And then Fig. 3 is that the peristome 36a with the peripheral recess 36 of inductor 10 is present in the schematic diagram that the state at vertical both ends blocks, and is the expression inductor 10 inner stereograms that constitute.In addition, Fig. 4 is the schematic diagram of the section of Fig. 3, is the sectional side view of inductor 10.And then Fig. 5 is the cross-sectional side view that the derivation recess 38 of the toroidal core 30 of expression inductor 10 constitutes.
And in the following description, so-called upper side (tip side) is meant the side that aftermentioned upper flange part 22 exists, and so-called lower side (bottom end side) is meant the side that aftermentioned lower flange 23 exists.
As Fig. 1～shown in Figure 4, inductor 10 is a surface installation inductor, has drum-shaped magnetic core 20, toroidal core 30, coil 40 and terminal component 50.
Drum-shaped magnetic core 20 and toroidal core 30 are made of the magnetic material of nickel based ferrite magnetic core etc.But the material of drum-shaped magnetic core 20 and toroidal core 30 is not limited to FERRITE CORE, also can be other magnetic materials such as resist permalloy.This drum-shaped magnetic core 20 is disposed at aftermentioned inserting hole 31.
As shown in Figures 3 and 4, be provided with as the drum-shaped magnetic core 20 of first magnetic core component, columned spool 21, be formed at spool 21 the above-below direction two ends, corresponding to the upper flange part 22 of flange part, and similarly corresponding to the lower flange 23 of flange part.In this example, be the state of the external diameter of upper flange part 22 greater than lower flange 23 external diameters.But, also can make the external diameter of the external diameter of upper flange part 22 and lower flange 23 roughly the same.
In addition, on the part that centers on by spool 21, upper flange part 22 and lower flange 23, be wound with coil 40.Coil 40 is the rounded round line of its section shape, is to be insulated the wire rod that layer covers on every side.In addition, in this example, it is the superfine wire of about 0.035mm that coil 40 uses the diameter of its section.But the diameter of coil 40 can have various variations.And, in the following description, this part (part that is centered on by spool 21, upper flange part 22 and lower flange 23) that is wound with this coil 40 is called bobbin portion 24.
In addition, as Fig. 1～shown in Figure 4, the outer circumferential side of drum-shaped magnetic core 20 is provided with the toroidal core 30 as second magnetic core component, and this toroidal core 30 is the roughly parts of ring-type for its outward appearance.Therefore, toroidal core 30 is provided with central authorities that are positioned at this perisporium 30a and the inserting hole 31 of inserting logical toroidal core 30 when being provided with perisporium 30a.Insert in the inserting hole 31 and be connected with drum-shaped magnetic core 20.Therefore, inserting hole 31 plays a role as axle bush portion.
As Fig. 1～shown in Figure 4, the upper surface 30b of toroidal core 30 and the bottom surface of upper flange part 22 join.That is to say that upper surface 30b becomes the part that is used for mounting upper flange part 22.In addition, toroidal core 30 is positioned at the outer circumferential side of bobbin portion 24 and the outer circumferential side of lower flange 23.Thus, toroidal core 30 covers the outer circumferential side of bobbin portion 24 and lower flange 23.And upper surface 30b is corresponding to the other end, and simultaneously, lower surface in the toroidal core 30, that be provided with plane terminal 51 sides (omitting diagram) is corresponding to an end face.
Here, as shown in Figure 2, toroidal core 30 is not circular ring-type, but form with three tops in foursquare four tops be cut into parallel with this foursquare diagonal (below, this barbed portion is called " ring periphery facet 32 ".), simultaneously, that top is is circular-arc (below, this circular arc portion is called " arc surface 33 ".)。And, in the following description, as ring periphery facet 32a, other two that will be adjacent to arc surface 33 are encircled periphery facets 32,32 respectively as encircling periphery facet 32b, 32c with ring periphery facet 32 in three ring periphery facets 32, relative with arc surface 33.
In addition, as shown in Figures 1 and 2, on the positions in the 30b of upper surface, above-mentioned arc surface 33 sides, be provided with protuberance 34 as locator protrusions.Protuberance 34 is positions more outstanding than upper surface 30b, has not than mounting in the upper flange part 22 of the upper surface 30b more outstanding size of projecting degree.In this protuberance 34, as inserting hole 31 sides and the face established for thirty years of age with respect to upper surface 30b, become arc surface 34a.Arc surface 34a is the part that combines with upper flange part 22 outer peripheral faces, and in addition, arc surface 34a is the shape of copying outer peripheral face.
If upper flange part 22 is connected to this arc surface 34a mutually, be the state that drum-shaped magnetic core 20 is positioned with respect to toroidal core 30.And protuberance 34 is not limited to the formation of Figure 1 and Figure 2, also can be used as a plurality of or the formation that pin shape parts are given prominence to from upper surface 30b.
Shown in Fig. 1, Fig. 4 etc., the bottom surface side of ring periphery facet 32b, the 32c of toroidal core 30 is provided with installs recess 35.It is the part of the part of toroidal core 30 bottom surfaces only being cut away upward given size that recess 35 is installed.In addition, in this example, installation recess 35 traverses the integrated radial of toroidal core 30 and is cut off.And the notch size that recess 35 is installed is set to, and aftermentioned plane terminal 51 is positioned under the situation of this installation recess 35, and this plane terminal 51 is than the bottom surface of toroidal core 30 and drum-shaped magnetic core 20 size of projecting degree a little downwards.In addition, in toroidal core 30, also can adopt to omit the formation that recess 35 forms is installed.
In addition, on ring periphery facet 32b, 32c, be provided with peripheral recess 36.Peripheral recess 36 is to only the cave in part of given size of internal side diameter than other parts of ring periphery facet 32b, 32c.At this, the afore mentioned rules size is, is positioned at aftermentioned periphery terminal 52 under the state of ring periphery facet 32b, 32c, can make the end 41 of coil 40 be positioned at the degree of depth (size) of the degree of the peripheral recess 36 that is centered on by periphery terminal 52 fully.That is to say, the depth dimensions of peripheral recess 36, or with terminal 41 equal diameters, or bigger a little than this terminal diameter.
In addition, in this example, peripheral recess 36 is arranged on the circumferential ends of ring periphery facet 32b, 32c.Therefore, peripheral recess 36 and ring periphery facet 32b, 32c are stairstepping.Then, aftermentioned periphery terminal 52 is installed, to cover the peripheral recess 36 under this state.Therefore, peripheral recess 36 is set to, and outside diameter is stopped up by periphery terminal 52, and simultaneously, circumferencial direction one side's side of toroidal core 30 is in opened state, can be from the engagement state of outside identification terminal 41.In addition, in this example, peripheral recess 36 is to traverse the above-below direction integral body of toroidal core 30, and the state that passes this ring periphery facet 32b, 32c is set up.
In addition, in the following description, with above-mentioned open portion as peristome 36a.
And then as Fig. 1,2,4 and shown in Figure 5, being provided with on the 30b of the upper surface of toroidal core 30 derives recess 38.Deriving recess 38 is, is used for being wound on the part of the end 41 of the coil 40 in the bobbin portion 24 to peripheral recess 36 guiding.At this, sew in order to prevent magnetic flux, derive recess 38 and form, the upper surface 30b of toroidal core 30 is only caved in order to make terminal 41 to be positioned at wherein necessary depth dimensions and width dimensions part.
At this, observe under the situation that derives recess 38 from the side, as shown in Figure 5, when the bottom of recess was general plane portion, its integral body formed and is roughly " V " word shape.But the side view that derives recess 38 is not limited to this.For example, the shape of end 41 that also can corresponding coil 40 forms its lower side and is circular shape (integral body is roughly " U " word shape).
In addition, on installation recess 35 and ring periphery facet 32b, 32c, terminal component 50 is installed.Terminal component 50 is to utilize punch press with tabular metal parts bending, or by carrying out the parts that stamping-out forms.This terminal component 50 is provided with plane terminal 51, periphery terminal 52 reaches fixedly claw 53.Wherein, plane terminal 51 is that bonding is fixed in the part of the adhesive surface of installation recess 35 as the back side.This plane terminal 51 as Fig. 1～shown in Figure 4, is configured in the bottom surface side of inductor 10, and become this inductor 10 by mounted on surface when circuit board (omitting diagram), with the contact site of board pads.Plane terminal 51 is fixed in the pad that is electrically connected on circuit board by reflow soldering.
As Fig. 1～shown in Figure 4, periphery terminal 52 is to form the roughly state bendings of 90 degree from plane terminal 51.This periphery terminal 52 is positioned at ring periphery facet 32b, 32c with the state that joins.Like this, the outside diameter by peripheral recess 36 is constituted clearance portion 37 by 52 coverings of periphery terminal.
In addition, terminal 41 for example engage by welding with respect to periphery terminal 52.But, beyond this welding, also can be by for example utilizing the laser welding of laser beam irradiation, or other various welding, end 41 is engaged with periphery terminal 52.
In addition, in this example, periphery terminal 52 has a shade below the height dimension of ring periphery facet 32b, 32c height dimension.Fixedly claw 53 extends from the head portion of this periphery terminal 52.Fixedly claw 53 to be forming the roughly state bendings of 90 degree from periphery terminal 52, and (in Fig. 1～Fig. 4, towards the direction of the internal side diameter of inductor 10) extends to the direction identical with plane terminal 51.
In addition, fixedly claw 53 be arranged in periphery terminal 52 head portions, from cover circumference that peripheral recess 36 1 sides leave distolateral on.In addition, in this example, fixedly the width dimensions of claw 53 is set at the width dimensions less than plane terminal 51 and periphery terminal 52.And then fixedly claw 53 only extends the length dimension that annoyance level does not take place with upper flange part 22 to the direction parallel with upper surface 30b.
In addition, in this example, fixedly claw 53 is the state that is contacted with upper surface 30b.But, also can fixedly form specified gap between claw 53 and the upper surface 30b, make binding agent between this gap etc.In addition, terminal component 50 is bonded by binding agent etc. at the back side of plane terminal 51, but also can be in the back side of periphery terminal 52 (face that engages with ring periphery facet 32b, 32c), the back side of this periphery terminal 52 is independent or bonded by binding agent etc. with plane terminal 51.
Have in manufacturing under the situation of inductor 10 of above formation, at first with respect to bobbin portion 24 coiling coils 40.After this reeled end, the upper side insertion drum-shaped magnetic core 20 from inserting hole 31 formed the bottom surface state of contact with respect to the upper surface 30b upper flange part 22 of toroidal core 30.At this moment, the outer peripheral face of formation upper flange part 22 is contacted with the state on the arc surface 34a.
In addition, when inserting above-mentioned drum-shaped magnetic core 20, binding agent is coated on upper flange part 22 or upper surface 30b, the arc surface 34a etc., thereby both are bondd.But, also can after drum-shaped magnetic core 20 is embedded gently and positions with respect to toroidal core 30, bond.
In addition, when drum-shaped magnetic core 20 was inserted inserting hole 31, coil 40 is entered derived recess 38.Then, make coil 40 in the boundary member bending of deriving recess 38 and peripheral recess 36, and make coil 40 enter clearance portion 37.Cut off coil 40 in these front and back that enter, the end 41 that is this coil 40 is positioned at the state of deriving recess 38 and clearance portion 37.
Next, in terminal component 50, the rear side adhesive stripe-coating of plane terminal 51 at least, form plane terminal 51, the periphery terminal 52 of this terminal component 50, respectively with recess 35, ring periphery facet 32b, 32c state of contact are installed.And, also can be in periphery terminal 52, be connected to the part of ring periphery facet 32b, 32c mutually, and also adhesive stripe-coating on the part fixedly in the claw 53, that join with upper surface 30b.
Next, carry out the welding of end 41 with respect to periphery terminal 52.Under this situation, insert scolding tin from peristome 36a, the heat fused means of running into flatiron etc. get final product.So, become the state soldered with respect to periphery terminal 52 terminal 41.Through above operation, produce inductor 10 as shown in Figure 1.
If adopt the inductor 10 of this formation, the end 41 of coil 40 is the state that is positioned at clearance portion 37.Therefore, the junction surface between the periphery terminal 52 and terminal 41 also is the state that is present in the clearance portion 37 between peripheral recess 36 and the periphery terminal 52.Thus,, also be the state that is present in clearance portion 37, can prevent that therefore this built-up welding part is outstanding to the outside owing to follow the built-up welding part that engages between end 41 and the periphery terminal 52.
Thus, and compare, the width dimensions of inductor 10 is lowered with respect to formation to the end 41 of the side-prominent Shu Duanzi coiling coil 40 of external diameter.In addition, the formation that partly is present in the outer peripheral face side of periphery terminal 52 with the built-up welding that produces because of welding is compared, and also can lower the width dimensions of inductor 10.
Particularly, the surface tension of the wetting scolding tin of the built-up welding part that produces because of welding when flatiron is left etc., its outstanding length can be elongated, and this situation becomes obvious in minute sized inductor 10.But owing to be provided with clearance portion 37 in the present invention, built-up welding partly is contained in this clearance portion 37, therefore also can not produce this capillary problem.Thus, can promote the miniaturization of inductor 10.
In addition since be terminal 41 and periphery terminal 52 between the bonding part be present in the formation of clearance portion 37, so the bonding part is the state that is covered by periphery terminal 52.Therefore, can prevent to impact being applied directly to the bonding part, can improve the bond strength of bonding part.In addition, owing to do not need therefore terminal 41 operations that are wound on the Shu Duanzi can be cut down the number of working processes, and can be sought the reduction of cost thus.
In addition, peripheral recess 36 is traversed the short transverse integral body of toroidal core 30 outer peripheral faces and is set up.Therefore, even terminal 41 length dimension more or less changes with respect to specific length,, just can make terminal 41 with respect to periphery terminal 52 joints as long as end 41 has the length of peripheral recess of overhanging 36.Therefore, need not adjust terminal 41 length, the operability when engaging is improved in order to engage with respect to periphery terminal 52.
And then, on the peripheral recess 36, on side's side of the outer peripheral face short transverse of toroidal core 30, be provided with peristome 36a.Therefore, make terminal 41 to be engaged under the situation of periphery terminal 52, by inserting flatiron etc. from open peristome 36a, the joint operation that can weld etc., and operability becomes good thus.Meanwhile, by the existence of peristome 36a, can the reliability of joint be improved from the engagement state of outside identification welding etc.
In addition, in this example, use drum-shaped magnetic core 20 as first magnetic core component.And, the upper flange part 22 of drum-shaped magnetic core 20, its bottom surface is traversed the full week of circumferencial direction with respect to the upper surface 30b of toroidal core 30 and is joined.Therefore, can prevent that magnetic flux is to external leakage between upper flange part 22 and toroidal core 30.In addition, owing in drum-shaped magnetic core 30, there is the such flange part of upper flange part 22 and lower flange 23, the location in the time of therefore can carrying out the coiling of coil 40 easily.Therefore, the operability during coiling coil 40 becomes good.
And then toroidal core 30 is provided with protuberance 34.Therefore, the outer peripheral face fastening by making upper flange part 22 can be carried out the location of drum-shaped magnetic core 20 with respect to toroidal core 30 on the arc surface 34a of protuberance 34.Thus, the operability when making inductor 10 is improved.
In addition, the upper surface 30b of toroidal core 30 is provided with derives recess 38, and the end 41 of coil 40 is derived to peripheral recess 36 by deriving recess 38.Thus, and end 41 mountings of coil 40 are compared in the situation of upper surface 30b, can prevent that the end 41 of coil 40 between upper flange part 22 and upper surface 30b is held.Therefore, can prevent to form the gap between upper flange part 22 and the upper surface 30b, can make upper flange part 22 traverse the full week of upper surface 30b and engage, can improve zygosity.
In addition, derive in the recess 38, therefore on the circumferencial direction of upper surface 30b, have the recess 38 of derivation that has only in gap because end 41 is present in.Therefore, traverse the full week of upper surface 30b with the gap and formation of existing etc. is compared, can reduce magnetic flux and sew.And then, derive the end 41 of coil 40 from deriving recess 38, the retained part of this end 41 does not exist.Like this, the existence of the retained part by terminal 41 can prevent the broken string of this end 41.Particularly, in this example, derive recess 38 (with reference to Fig. 5) and compare with the recess 2 (with reference to Fig. 6) under the prior art, opening portion is little, and formation is only caved in order to make end 41 be positioned at the formation of wherein necessary depth dimensions and width dimensions.Therefore, can suppress the reduction of the magnetic field intensity of inductor 10.
And then in this example, the width dimensions that makes periphery terminal 52 is greater than the fixing width dimensions of claw 53.Therefore, when welding, can block scolding tin well by periphery terminal 52.
More than, an example of the present invention is illustrated, but in addition the present invention can also have various distortion.Below, be explained.
In above-mentioned example,, use the situation of toroidal core 30 to be illustrated as second magnetic core component to using drum-shaped magnetic core 20 as first magnetic core component.But first magnetic core component and second magnetic core component are not limited to drum-shaped magnetic core 20 and toroidal core 30.For example, also first magnetic core component (only can be provided with upper flange part 22 as " T " font magnetic core, be not provided with the magnetic core component of lower flange 23), simultaneously, with second magnetic core component as kettle shape magnetic core (magnetic core component that has on the central portion depressed part that embeds " T " font magnetic core).
In this case, also with drum-shaped magnetic core 20 in the same manner, as long as form upper flange part 22 mountings in the state of upper surface 30b, just can adopt the formation identical (peripheral recess 36 is set, and to cover the state mounting terminal parts 50 of peripheral recess 36) on the outer peripheral face of kettle shape magnetic core with the inductor 10 of above-mentioned example.Therefore, even in adopting the inductor that is somebody's turn to do " T " font magnetic core and kettle shape core type, also can seek the attenuating of width dimensions.In addition, under the situation of kettle shape magnetic core, because the below is provided with the bottom, the magnetic flux that therefore can lower this below is sewed.
In addition, in above-mentioned example, the situation that the present invention is applicable to surface installation inductor 10 is illustrated.But inductor of the present invention is not limited to surface installing type, also can be the inductor that is provided with the terminal component with outstanding mounting terminal downwards.
In addition, in above-mentioned example, drum-shaped magnetic core 20 is illustrated by the inductor 10 of toroidal core 30 cover types.But, being not limited to the type as inductor, the housing that also can be to use resin by non-conductive parts etc. to constitute replaces second magnetic core component, and covers the type of first magnetic core component by this housing.
And then, in above-mentioned example, the formation that is provided with fixing claw 53, has roughly a terminal component 50 of " コ " word shape is illustrated.But, as terminal component, for example also can adopt omit fixing claw 53, the terminal component of " L " word shape roughly.
In addition, in above-mentioned example, as first magnetic core component to drum-shaped magnetic core 20, toroidal core 30 is illustrated as second magnetic core component.But first magnetic core component and second magnetic core component are not limited to this.For example, also can on the E of closed magnetic circuit type type magnetic core, be provided with above-mentioned same peripheral recess, derive recess etc.
And then, in above-mentioned example, peripheral recess 36 is set and utilizes periphery terminal 52 to cover by the outer peripheral face depression that makes toroidal core 30, form clearance portion 37.But clearance portion 37 is not limited to be provided with the formation of this peripheral recess 36.For example constitute, the rear side of periphery terminal 52 is only caved in corresponding to terminal 41 size part, simultaneously, on the outer peripheral face of toroidal core 30, do not form recess.Under the situation that both that make this formation are joined, also be provided with and enter terminal 41 clearance portion 37.
In addition, in above-mentioned example, adopt peripheral recess 36 to be positioned at the end side of terminal component 50, and have the formation of peristome 36a.But peripheral recess 36 is not limited to exist the formation of peristome 36a, also can adopt the formation that does not have peristome 36a.And, under the situation that adopts the formation that does not have peristome 36a, also can adopt peripheral recess to be positioned at the formation of the Width middle body of periphery terminal 52.
In addition, in above-mentioned example, be illustrated use the situation of the rounded coil 40 of section as coil.But coil is not limited to section and is circular coil 40, also can use the coil of the rectangular other types such as coil of section for example.
In addition, for example, even in such other electronic units of transformer and filter, the peripheral recess identical with above-mentioned example also can be set, derive recess etc.
The industrial possibility of utilizing
Inductor of the present invention can be used in the electrical equipment field.
Claims (8)
1. an inductor is characterized in that, is provided with:
First magnetic core component with spool;
Be wound in the coil of said reel outer peripheral face;
Have the axle bush portion that is centered on by perisporium and make above-mentioned first magnetic core component be disposed at second magnetic core component of this axle bush portion; And
Be positioned on the outer peripheral face of above-mentioned second magnetic core component, simultaneously, have periphery terminal that the end that makes above-mentioned coil engages and more outstanding and be installed on the terminal component of the plane terminal on the installation position than an end face of above-mentioned second magnetic core component;
Be provided with between the outer peripheral face of above-mentioned perisporium and above-mentioned periphery terminal and be used to clearance portion that above-mentioned end is entered, simultaneously, above-mentioned end engages with above-mentioned periphery terminal in this clearance portion.
2. inductor as claimed in claim 1 is characterized in that, said clearance portion is that the peripheral recess that the perisporium outer peripheral face of above-mentioned second magnetic core component is recessed to form by above-mentioned outer circumference end subcovering constitutes.
3. inductor as claimed in claim 2 is characterized in that, said peripheral recess is that the integral body of traversing the outer peripheral face short transverse of above-mentioned second magnetic core component is set up.
4. as claim 2 or 3 described inductors, it is characterized in that, said peripheral recess, its side's side along the outer peripheral face short transverse of above-mentioned second magnetic core component is open with respect to the outside.
5. as any described inductor in the claim 1～4, it is characterized in that, said first magnetic core component is provided with at least one flange part that comprises upper flange part, above-mentioned upper flange part traverses its full week with respect to the other end of above-mentioned second magnetic core component and joins, simultaneously, the other end of said second magnetic core component is provided with, and combines and carry out the locator protrusions of the location of above-mentioned first magnetic core component with the outer peripheral face of above-mentioned upper flange part.
6. inductor as claimed in claim 5 is characterized in that, the other end of said second magnetic core component is provided with the derivation recess than this other end depression, and the above-mentioned end of said coil is derived to above-mentioned peripheral recess by this derivation recess.
7. as any described inductor in the claim 1～6, it is characterized in that, said first magnetic core component is, on the axis direction both end sides of said reel, be respectively equipped with the drum-shaped magnetic core of upper flange part and lower flange, simultaneously, said second magnetic core component is the toroidal core that is provided with inserting hole, and above-mentioned drum-shaped magnetic core is inserted and led in this inserting hole.
8. as any described inductor in the claim 1～7, it is characterized in that said terminal component is provided with the fixedly claw that combines with the other end of above-mentioned second magnetic core component.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP159115/2004 | 2004-05-28 | ||
| JP2004159115A JP4512420B2 (en) | 2004-05-28 | 2004-05-28 | Inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1957430A true CN1957430A (en) | 2007-05-02 |
| CN100580828C CN100580828C (en) | 2010-01-13 |
Family
ID=35451114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580016961A Expired - Fee Related CN100580828C (en) | 2004-05-28 | 2005-05-27 | Inductor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4512420B2 (en) |
| CN (1) | CN100580828C (en) |
| WO (1) | WO2005117038A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290194A (en) * | 2010-04-27 | 2011-12-21 | 胜美达集团株式会社 | Coil component |
| CN102903492A (en) * | 2011-07-25 | 2013-01-30 | 胜美达集团株式会社 | Magnetic component |
| CN108352245A (en) * | 2015-11-20 | 2018-07-31 | 埃普科斯股份有限公司 | SMD inductors and its manufacturing method with high peak current load ability and low loss |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5309682B2 (en) | 2007-05-25 | 2013-10-09 | スミダコーポレーション株式会社 | Inductance element |
| JP2009088224A (en) * | 2007-09-28 | 2009-04-23 | Tdk Corp | Coil part |
| JP5099430B2 (en) * | 2007-12-27 | 2012-12-19 | Ｔｄｋ株式会社 | Coil parts |
| KR200457491Y1 (en) | 2009-09-03 | 2011-12-22 | 지이티플러스(주) | Surface Mount Device power inductor |
| JP5927641B2 (en) * | 2010-12-13 | 2016-06-01 | アルプス・グリーンデバイス株式会社 | Inductance element |
| JP6273483B2 (en) * | 2013-01-31 | 2018-02-07 | パナソニックＩｐマネジメント株式会社 | Coil parts |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01281712A (en) * | 1988-05-09 | 1989-11-13 | Fujitsu Ltd | Transformer |
| JP3433379B2 (en) * | 1997-05-16 | 2003-08-04 | ミツミ電機株式会社 | choke coil |
| JP3368277B2 (en) * | 1998-10-12 | 2003-01-20 | スミダコーポレーション株式会社 | Auxiliary tool for high-frequency transformer winding |
| JP3693557B2 (en) * | 2000-05-29 | 2005-09-07 | 松下電器産業株式会社 | Inductance element |
| JP3743358B2 (en) * | 2001-11-30 | 2006-02-08 | 松下電器産業株式会社 | choke coil |
-
2004
- 2004-05-28 JP JP2004159115A patent/JP4512420B2/en not_active Expired - Fee Related
-
2005
- 2005-05-27 WO PCT/JP2005/009729 patent/WO2005117038A1/en active Application Filing
- 2005-05-27 CN CN200580016961A patent/CN100580828C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290194A (en) * | 2010-04-27 | 2011-12-21 | 胜美达集团株式会社 | Coil component |
| US8629747B2 (en) | 2010-04-27 | 2014-01-14 | Sumida Corporation | Coil component |
| CN103559979A (en) * | 2010-04-27 | 2014-02-05 | 胜美达集团株式会社 | Coil component |
| US9177720B2 (en) | 2010-04-27 | 2015-11-03 | Sumida Corporation | Method of producing a coil component |
| US10170233B2 (en) | 2010-04-27 | 2019-01-01 | Sumida Corporation | Coil component |
| CN102903492A (en) * | 2011-07-25 | 2013-01-30 | 胜美达集团株式会社 | Magnetic component |
| CN108352245A (en) * | 2015-11-20 | 2018-07-31 | 埃普科斯股份有限公司 | SMD inductors and its manufacturing method with high peak current load ability and low loss |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005340608A (en) | 2005-12-08 |
| CN100580828C (en) | 2010-01-13 |
| JP4512420B2 (en) | 2010-07-28 |
| WO2005117038A1 (en) | 2005-12-08 |
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