CN1489159A - Inductance element - Google Patents
Inductance element Download PDFInfo
- Publication number
- CN1489159A CN1489159A CNA031567215A CN03156721A CN1489159A CN 1489159 A CN1489159 A CN 1489159A CN A031567215 A CNA031567215 A CN A031567215A CN 03156721 A CN03156721 A CN 03156721A CN 1489159 A CN1489159 A CN 1489159A
- Authority
- CN
- China
- Prior art keywords
- inductance element
- iron core
- fixing metal
- fixing
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Abstract
To simply realize fixing of cores and countermeasures against noises in an inductance element.The inductance element is mounted to a wiring board. A pair of cores 3, 4 are fitted into a coil bobbin 2, to which a winding is formed. The cores are clipped with a fixing metal fitting 5 made of metals and incorporated. The fixing metal fitting 5 has a shielding function and functions as a shield, to interrupt leakage magnetic fluxes of the inductance element. Also, since a terminal part for fixing to the wiring board 7 is provided to the fixing metal fitting 5, mounting state is reinforced.
Description
Technical field
The present invention relates to a kind of inductance element, particularly relate to the improvement of its shielding construction as transformer and line filter etc.
Background technology
As the transformer that is used in as conversion electric power etc., known have a structure of assembling mutually as the iron core of magnetic core and the skeleton that has twined primary winding and secondary coil.Transformer with this structure is wrapped in the end portion of each coil on the terminal pins that is arranged on the coil rack, this terminal pins is inserted in the through hole that is arranged on the printed circuit board (PCB) and by pricker tin be installed on the printed circuit board (PCB).
But above-mentioned conversion electric power is compared with other electron component has bigger electromagnetic interference, has the danger of electromagnetic wave to having a negative impact around it.Particularly, the progress of the densification of installing along with the miniaturization of electronic installation and parts, it is more remarkable that the problems referred to above just become.
To this, the solution of various shielding constructions has been proposed, for example in Japanese kokai publication hei 10-335160 communique, disclose a kind ofly around being installed in the lead-out wire of the inductance element (transformer) on the substrate and the connecting portion of terminal, metal barricade soldering is connected shielding construction on the substrate.Also have, in TOHKEMY 2000-124656 communique, also disclose a kind of be installed in circuit board on the relative parent circuit board surface of coil part (transformer) on the shielding construction of the magnetic sheet that attaches.Both of these case all is to utilize barricade or magnetic sheet to reduce the magnetic leakage flux of inductance element, to suppress the adverse effect to other electronic component.
But in these prior aries, the problem of existence is: the parts (barricade or magnetic sheet) that all must will have function of shielding are installed on the inductance element circuit board in addition, and install complicated.In addition, though recognize that shield effectiveness was better when parts with function of shielding and the distance between the inductance element were near as far as possible, they are respectively installed to different occasions, its distance is near also restricted.
On the other hand, with regard to the structure of inductance element itself, also there is the problem that must solve.Particularly, for the inductance element of the core structure of assembling split, exist the problem of how to carry out the iron core assembling.In the prior art, perhaps use and fix, perhaps use insulating tape to fix, but all need to carry out loaded down with trivial details operation, thereby cause productivity ratio low as insulating properties varnish.
Summary of the invention
Purpose of the present invention is exactly in order to solve above-mentioned problems of the prior art, can realize that the core of iron fixes and eliminate the inductance element of the measure of noise in simple mode and provide a kind of.
For achieving the above object, the inductance element that is installed on the circuit board provided by the invention, it is characterized in that, embed in a pair of iron core in the coil on coil rack, this iron core is supported in the fixing metal spare pushing that is made of metal, the said fixing metalwork has function of shielding simultaneously, also is provided with the terminal that can fix this fixing metal spare on circuit board.
The fixing metal spare that inductance element of the present invention can be made of metal carries out the assembling of iron core by clamping.Therefore, do not need to use insulating properties varnish or insulating tape etc. fixing, just can fix easily.
In addition, above-mentioned metal fixing metal spare has function of shielding simultaneously, also has shielding action when carrying out said fixing.Therefore, needn't on circuit board, in addition shield member be installed, assembling operation is simplified.In addition, because fixing metal spare is made with iron core and is connected, make the distance of inductance element and shielding part become minimum, thereby improved shield effectiveness.
Description of drawings
Fig. 1 is the stereogram of indication transformer to the mounting structure of printed circuit board (PCB);
Fig. 2 is the exploded perspective view of transformer;
Fig. 3 represents the plane graph by the state of fixing metal spare secured core, and wherein (a) installs and fixes the preceding situation of metalwork; (b) be the situation of having installed behind the fixing metal spare.
Embodiment
Below, describe using inductance element of the present invention with reference to accompanying drawing.
Fig. 1 and Fig. 2 are to use conversion element of the present invention, particularly show an example of the transformer of magnetic core pressure-bearing type.Fig. 1 is that expression will use transformer of the present invention to be installed in situation on the printed circuit board (PCB), and Fig. 2 is the situation after expression will be used transformer decomposition of the present invention.
The transformer of present embodiment, it is by coil rack 2, a pair of iron core 3,4 and fixing metal spare 5 form, coil rack 2 is wound with the winding 1 of primary winding and secondary coil etc., and iron core 3,4 inserts among the coil hole 2a of coil rack 2, the fixing metal spare that is made of metal 5 is used to carry out the assembling of these iron cores 3,4.
Coil rack 2 has flange 2b, 2c by being made up of the molded part of for example plastics at its two ends.Therefore, the winding 1 that twines on coil rack 2 is by these flanges 2b, and 2c is limited in the winding scope, comes off from coil rack 2 preventing.
In addition, on the bottom surface portions of coil rack 2, a plurality of metal terminal pins 6 are arranged by predetermined interval setting, above-mentioned each coil, promptly the end of winding 1 is wrapped in respectively on the terminal pins 6.
Above-mentioned iron core 3,4 is made up of magnetic materials such as for example ferrites, plays the effect of gathering the magnetic flux that is produced by above-mentioned coil.In the present embodiment, the iron core 3,4 that is divided into 2 parts has the E font respectively.With middle iron core 3a, 4a is inserted among the coil hole 2a of above-mentioned coil rack 2, and its front end is in contact with one another.
These iron cores 3,4 are fixed with clamped form by said fixing metalwork 5, mechanically with coil rack 2 assemblings.Metal fixing metal spare 5 has shielding action, therefore, is made the fixing not just with simple mechanical combination between the iron core 3,4 of iron core 3,4 by fixing metal spare 5, and is the effect of having played shielding.
Fig. 3 shows the situation with fixing metal spare 5 assembling iron cores 3,4, and fixing metal spare 5 has from push-pads (clamping section) 5a of both sides pushing iron core 3,4,5b, and with these push-pads 5a, 5b connects and is roughly side U font by brace 5c.Therefore, when being installed on the iron core 3,4, three limits that can shielding iron core 3,4.Thereby the installation direction of fixing metal spare 5 relative iron cores 3,4 preferably decides according to parts setting on every side.For example, in parts one side that the influence that is subjected to leakage magnetic flux easily is installed fixing metal spare 5 is set.
Respectively crooked each push-pads 5a, 5b and make it have circular shape, shown in Fig. 3 (a), its spacing W is set at littler than the dimension D of the iron core 3,4 of butt joint.Therefore, shown in Fig. 3 (b), open these push-pads 5a, when 5b attached it on the iron core 3,4, because metallic plate is these push-pads 5a, the elastic force of 5b was to the pushing of the direction of arrow shown in the figure, and the result can be with these mechanically combinations of iron core 3,4.
In addition, said fixing metalwork 5 is provided with the pin shape terminal 5d of prolongation at the middle position of its brace 5c.When the transformer of said structure was installed on the printed circuit board (PCB) 7, this terminal 5d can be fixed on the printed circuit board (PCB) 7 simultaneously, can realize the enhancing and the electrical connection of machinery.In addition, in the present embodiment,, be not limited thereto, also can be provided with a plurality of though only be provided with this terminal 5d at a place.By above-mentioned terminal 5d is set in many places, its installation strength is further improved.
It is when will be arranged on terminal pins 6 on the above-mentioned coil rack 2 and be inserted in the through hole 8 that is formed on the printed circuit board (PCB) 7 that inductance element with above structure is installed on the printed circuit board (PCB) 7, the terminal 5d that will be provided with on said fixing metalwork 5 is inserted in the through hole 9, and it is carried out soldering and realizes machinery and electrical connection.
Be wrapped in each end of the winding 1 on the coil rack 2,, be combined into predetermined circuit by being electrically connected with the wiring diagram of being scheduled to respectively in the through hole 8 of terminal pins 6 insertion printed circuit board (PCB)s 7.Equally, said fixing metalwork 5 also inserts in the through hole 9 of printed circuit board (PCB) 7 by terminal 5d and is electrically connected with ground connection (ground wire) figure.Therefore, be transformed into eddy current by fixing metal spare 5, rapidly disappear by this terminal 5d and through hole 9 by the leakage magnetic flux that transformer produced.
Illustrated that more than the present invention is used in the embodiment on the transformer of conversion electric power etc., but the present invention is not only applicable to transformer, can be used for line filter etc. yet.In line filter, the structure of inserting iron core in coil rack is known, and is the same with the foregoing description, can utilize metal fixing metal spare that these iron cores are assembled.
Can be clear by the above, according to the present invention,, can realize the mechanical fixation of iron core simultaneously and eliminate noise by with fixing metal spare assembling iron core with function of shielding.Thereby, can simplify assembling operation.In addition, owing on fixing metal spare, also be provided with the terminal that is used for fixing on the printed circuit board (PCB), therefore also strengthened making it more firm to the mounting structure of printed circuit board (PCB).
Claims (6)
1. inductance element in the inductance element, is characterized in that on being installed in circuit board: in a pair of iron core of packing in being wound with the coil rack of winding, these iron cores are supported by metal fixing metal spare pushing;
When the said fixing metalwork has function of shielding, also be provided with and be used for this fixing metal spare is fixed to terminal on the circuit board.
2. inductance element as claimed in claim 1 is characterized in that: described terminal is electrically connected with grounding electrode on being arranged on circuit board.
3. inductance element as claimed in claim 1 is characterized in that: described fixing metal spare has clamping part, and this clamping part pushes by the elastic force of clamping described iron core and supports this iron core.
4. inductance element as claimed in claim 1 is characterized in that: described fixing metal spare shields three limits of above-mentioned iron core.
5. inductance element as claimed in claim 1 is characterized in that: described inductance element is a transformer.
6. inductance element as claimed in claim 1 is characterized in that: described inductance element is a line filter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002285109A JP2004119940A (en) | 2002-09-30 | 2002-09-30 | Inductance element |
| JP2002285109 | 2002-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1489159A true CN1489159A (en) | 2004-04-14 |
Family
ID=32278498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031567215A Pending CN1489159A (en) | 2002-09-30 | 2003-09-08 | Inductance element |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004119940A (en) |
| CN (1) | CN1489159A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510461B (en) * | 2008-11-18 | 2010-12-29 | 徐建 | Perpendicular style electromagnetical reset coil using printed circuit board as base |
| CN102906830A (en) * | 2010-05-05 | 2013-01-30 | 马维尔国际贸易有限公司 | Magnetically shielded inductor structure |
| CN106683853A (en) * | 2017-03-17 | 2017-05-17 | 艾德克斯电子（南京）有限公司 | Transformer frame, transformer, transformer connection circuit and switching power supply |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008005171A (en) * | 2006-06-21 | 2008-01-10 | Matsushita Electric Works Ltd | Line filter with base |
| WO2023210954A1 (en) * | 2022-04-28 | 2023-11-02 | 삼성전자주식회사 | Display device and electronic device |
-
2002
- 2002-09-30 JP JP2002285109A patent/JP2004119940A/en active Pending
-
2003
- 2003-09-08 CN CNA031567215A patent/CN1489159A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510461B (en) * | 2008-11-18 | 2010-12-29 | 徐建 | Perpendicular style electromagnetical reset coil using printed circuit board as base |
| CN102906830A (en) * | 2010-05-05 | 2013-01-30 | 马维尔国际贸易有限公司 | Magnetically shielded inductor structure |
| CN106683853A (en) * | 2017-03-17 | 2017-05-17 | 艾德克斯电子（南京）有限公司 | Transformer frame, transformer, transformer connection circuit and switching power supply |
| CN106683853B (en) * | 2017-03-17 | 2020-10-02 | 艾德克斯电子（南京）有限公司 | Transformer framework, transformer connecting circuit and switching power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004119940A (en) | 2004-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |