CN203013488U - Magnetic bead and printed circuit board using the same - Google Patents
Magnetic bead and printed circuit board using the same Download PDFInfo
- Publication number
- CN203013488U CN203013488U CN 201220727358 CN201220727358U CN203013488U CN 203013488 U CN203013488 U CN 203013488U CN 201220727358 CN201220727358 CN 201220727358 CN 201220727358 U CN201220727358 U CN 201220727358U CN 203013488 U CN203013488 U CN 203013488U
- Authority
- CN
- China
- Prior art keywords
- magnetic bead
- pin
- circuit board
- magnet ring
- printed circuit
- 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.)
- Expired - Fee Related
Links
- 239000011324 bead Substances 0.000 title claims abstract description 67
- 239000013078 crystal Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency 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
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
The utility model provides a magnetic bead which comprises a magnetic ring and two pins arranged at two ends of the magnetic ring, the magnetic ring comprises a through hole, the pins are in electric connection with the through hole of the magnetic ring, the pins are cylinder-shaped, one bottom surface of the cylinder shape contacts with the magnetic ring, and the side face is protruded out of the outer surface of the magnetic ring to enable the side faces of the pins to contact with the printed circuit board. The side faces of the pins of the magnetic bead are protruded out of the outer surface of the magnetic ring, when the bead is arranged on the circuit board, the side faces of the pins can be connected with the circuit board directly, no matter how the magnetic bead rotates, the side faces of the pins can always contact with the circuit board in advance of the magnetic ring, and judging of the direction of the magnetic bead during installation is avoided. Use is convenient, production efficiency is improved, and the defect rate is reduced.
Description
Technical field
The utility model relates to technical field of filtering, relates in particular to a kind of SMD magnetic bead easy to use and uses the printed circuit board (PCB) of this magnetic bead.
Background technology
The function of magnetic bead is mainly to eliminate the high-frequency electromagnetic noise that is present in transmission line structure (circuit), the electromagnetic noise energy is that the high frequency spike that is superimposed upon on transmission level disturbs or the harmonic wave interference component, low frequency or flip-flop are the useful signals that needs, and the electromagnetic noise energy is that useless electromagnetic interference is along circuit transmission and radiation (EMI).Eliminate these unwanted signal energy, use magnetic bead to play the part of role's (attenuator) of alternating-current resistance, this device allows low frequency or direct current signal to pass through, and the filtering high frequency ac signal.Because the magnetic bead higher-frequency that can decay allows simultaneously and almost unhinderedly passes through than low frequency, therefore obtained using widely in EMI controls.The magnetic bead that is used for the EMI absorption can be made into various shapes, is widely used in various occasions.As on pcb board, can be added in DC/DC module, data wire, power line etc. and locate.It absorbs institute's high-frequency interferencing signal on the line, but can not produce new zero limit in system, can not destroy Systems balanth.It and power-supply filter are used in conjunction with, filtering characteristic in the good deficiency of supplemental filter front end performance, improvement system.
Existing SMD magnetic bead is that employing is square, circular or leg-of-mutton magnet ring, the structure of the pin of outer of coupling splayed or I shape indent.Figure 1A is depicted as the structural representation I of magnetic bead in prior art, and Figure 1B is depicted as the structural representation II of magnetic bead in prior art.Shown in Figure 1A and Figure 1B, magnetic bead 101 has magnet ring 102 and pin 103, and described pin 103 passes from the inside of magnet ring 102, and described magnet ring 102 can for circular (as shown in Figure 1A), can be square (as shown in Figure 1B).The two ends of described pin 103 are connected with printed circuit board (PCB), make electric current pass through from magnetic bead, thereby realize the function of magnetic bead filtering AC signal.Fig. 1 C is depicted as magnetic bead and is mounted on schematic diagram on printed circuit board (PCB), and electric crystal 104 is installed the front with printed circuit board (PCB) 105, and magnetic bead 101 is installed on the back side of printed circuit board (PCB) 105, the two ends of the pin 103 of magnetic bead 101 and printed circuit board (PCB) 105 electric connections.
Existing magnetic bead, pin are connected with printed circuit board (PCB) stretch out bending from magnet ring after, therefore need in process of production the direction of magnetic bead is distinguished especially, are connected with printed circuit board (PCB) to guarantee the two ends after bending pins.If the direction identification mistake can be connected magnet ring with printed circuit board (PCB), can not realize the electric connection of magnetic bead and printed circuit board (PCB).Therefore, in process of production, need to expend for a long time distinguishing of magnetic bead direction, affect production efficiency, also exist simultaneously and paste reverse risk, affect the quality of product, increase the defective products rate.
The utility model content
Technical problem to be solved in the utility model is, provides a kind of easy to use, need not distinguish the magnetic bead of installation direction and use the printed circuit board (PCB) of this magnetic bead.
In order to address the above problem, the utility model provides a kind of magnetic bead, the two pins that comprises a magnet ring and magnet ring two ends, described magnet ring comprises a through hole, described pin is electrically connected via the through hole of described magnet ring, and described pin is cylindrical, and a columniform bottom surface contacts with magnet ring, the side projects to beyond the outer surface of described magnet ring, uses so that the side of described pin can contact with printed circuit board (PCB).
Further, described two pins is respectively arranged with towards the one side of through hole the connecting elements that cooperatively interacts, and described connecting elements passes described through hole and mutually pegs graft.
Further, the part that described connecting elements is connected with a pin is Metallic rod, and the part that is connected with another pin is the metal jack that cooperatively interacts with Metallic rod.
Further, comprise a connecting rod, described pin has respectively a through hole, described connecting rod passes the through hole of pin and magnet ring, in order to be arranged at the pin electric connection at through hole two ends, described connecting rod has bending from the through hole extension of pin, is used for described pin is fixed in the two ends of described magnet ring.
Further, described magnet ring is cylindrical or prismatic.
A kind of printed circuit board (PCB) comprises electric crystal, also comprises the magnetic bead that at least one is above-mentioned, and the pin of described magnetic bead and printed circuit board (PCB) are electrically connected.
Further, described electric crystal is arranged at the one side of printed circuit board (PCB), and described magnetic bead is arranged at the another side of printed circuit board (PCB).
The utility model has the advantage of, the pin of magnetic bead is cylindrical, and a columniform bottom surface contacts with magnet ring, and the side projects to beyond the outer surface of described magnetic bead, when installing magnetic bead in the circuit board, can be directly the side of pin be connected with wiring board, rotates in any case magnetic bead, the side of pin always can contact with wiring board prior to magnet ring, thereby needn't distinguish when mounted the direction of magnetic bead, easy to use, improved production efficiency, reduce the defective products rate.
Description of drawings
Figure 1A is depicted as the structural representation I of magnetic bead in prior art;
Figure 1B is depicted as the structural representation II of magnetic bead in prior art;
Fig. 1 C is depicted as magnetic bead and is mounted on schematic diagram on printed circuit board (PCB);
Fig. 2 A is depicted as the structural representation of an embodiment of the utility model magnetic bead;
Fig. 2 B is depicted as the utility model magnetic bead and is arranged on structural representation on printed circuit board (PCB);
Fig. 3 A is depicted as the structural representation of an execution mode middle magnetic ring of the utility model
Fig. 3 B is depicted as the structural representation of a pin in execution mode of the utility model;
Fig. 3 C is depicted as the structural representation of another pin in execution mode of the utility model
Fig. 3 D is depicted as the structural representation of two pin combinations in execution mode of the utility model;
Fig. 4 A is depicted as the structural representation of pin in another execution mode of the utility model;
Fig. 4 B is depicted as the structural representation of connecting rod in another execution mode of the utility model;
Fig. 4 C is depicted as the structural representation of the magnetic bead that uses the connecting rod connection in another execution mode of the utility model;
Figure 5 shows that the structural representation of a kind of printed circuit board (PCB) of the utility model.
Embodiment
The embodiment of the magnetic bead that the utility model is provided below in conjunction with accompanying drawing elaborates.
Fig. 2 A is depicted as the structural representation of an embodiment of the utility model magnetic bead.Shown in Fig. 2 A, the utility model magnetic bead 201 comprises magnet ring 202 and is arranged at the two pins 203 at magnet ring 202 two ends, described magnet ring 202 comprises that a through hole 206(is shown in Fig. 3 A), the pin 203 that is arranged at magnet ring 202 two ends is electrically connected via the through hole 206 of described magnet ring 202.
Described pin 203 is cylindrical, and columniform bottom surface contacts with magnet ring 202, and side 211 projects to beyond the outer surface 212 of magnet ring 202, so that the side of described pin 211 is electrically connected with printed circuit board (PCB) 205.When being connected to magnetic bead 201 on printed circuit board (PCB) 205, the side 211 of described pin 203 directly contacts with the surface electrical behavior of printed circuit board (PCB) 205, shown in Fig. 2 B.The side 211 of pin 203 projects to beyond the outer surface 212 of magnet ring 202, when being arranged on magnetic bead 201 on printed circuit board (PCB) 205, can be directly the side 211 of pin 203 be connected with printed circuit board (PCB) 205, rotate in any case magnetic bead 201, the side 211 of pin 203 always can contact with printed circuit board (PCB) 205 prior to magnet ring 202, thereby needn't distinguish when mounted the direction of magnetic bead, and is easy to use, improve production efficiency, reduced the defective products rate.
Described magnet ring 202 is made of the Ferrite material, and when having electric current to pass through, it can filter high frequency ac signal, allows low frequency or direct current signal to pass through, thereby eliminates useless electromagnetic interference in circuit.Described pin 203 is made of metal material, such as copper, gold, silver etc.Described pin 203 contacts with the copper-clad surface of printed circuit board (PCB) 205, realizes the electrical contact of printed circuit board (PCB) 205 and pin 203.
In the present embodiment, the electric connection between described pin 203 realizes by connecting elements.Fig. 3 A is depicted as the structural representation of present embodiment middle magnetic ring, and referring to Fig. 3 A, described magnet ring 202 has through hole 206, and described through hole 206 runs through described magnet ring 202.Described pin 203 is arranged at the two ends of through hole 206.
Fig. 3 B is depicted as the structural representation of a pin of present embodiment, and Fig. 3 C is depicted as the structural representation of another pin of present embodiment, and Fig. 3 D is depicted as the structural representation of two pin combinations.Shown in Fig. 3 B, Fig. 3 C and Fig. 3 D, described pin 203 is respectively arranged with towards the one side of through hole 206 connecting elements that cooperatively interacts, described connecting elements can be realized the electric connection of 203 of pins, in the present embodiment, the part that described connecting elements is connected with a pin 203 is Metallic rod 207, the part that is connected with another pin 203 is metal jack 208, described Metallic rod 207 can be inserted in metal jack 208, Metallic rod 207 cooperatively interacts with metal jack 208, realizes the electric connection of 203 of two pins.
Two parts Metallic rod 207 of described connecting elements and through hole 206 interior be connected of metal jack 208 at magnet ring 202, so both can realize the electric connection of 203 of two pins, also can support magnet ring 202, make pin 203 and magnet ring 202 form magnetic bead 201, shown in Fig. 2 A.
In other execution modes of the present invention, the electric connection between described pin 203 realizes by connecting rod.Fig. 4 A is depicted as the structural representation of pin, and Fig. 4 B is depicted as the structural representation of wire, and Fig. 4 C is depicted as the structural representation of the magnetic bead that uses the connecting rod connection.Shown in Fig. 3 A, Fig. 4 A, Fig. 4 B and Fig. 4 C, described magnet ring 202 has through hole 206, described two pins 203 has through hole 209, the through hole 209 of described pin 203 communicates with the through hole 206 of magnet ring 202, described connecting rod 210 passes the through hole 209 and 206 of described pin 203 and magnet ring 202, and described connecting rod 210 is electrically connected with pin 203, thereby realizes the electric connection of 203 of pins, simultaneously, connecting rod 210 can also play the effect of supporting magnet ring 202.Further, described connecting rod 210 has bending from through hole 209 extensions of pin, is used for described pin 206 is fixed in the two ends of described magnet ring 202.
Described magnet ring 202 can for cylindrical or prismatic, as long as satisfy the side of pin 203 higher than the side of magnet ring 202, in any case rotate magnetic bead, get final product always pin 203 first contacts with printed circuit board (PCB).
Figure 5 shows that the structural representation of a kind of printed circuit board (PCB) of the utility model.Shown in Figure 5, a kind of printed circuit board (PCB) comprises electric crystal 301 and magnetic bead 302, in the present embodiment, described electric crystal 301 is arranged at the one side of printed circuit board (PCB), described magnetic bead 302 is arranged at the another side of printed circuit board (PCB), and the pin 303 of described magnetic bead 302 is electrically connected with the copper-clad surface of printed circuit board (PCB).Described connected mode can adopt any connected mode well known to those skilled in the art, such as welding, conducting resinl stickup etc.The structure of described magnetic bead 302 is identical with the structure of above-described magnetic bead, does not repeat them here.
The above is only preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (7)
1. magnetic bead, the two pins that comprises a magnet ring and magnet ring two ends, described magnet ring comprises a through hole, described pin is electrically connected via the through hole of described magnet ring, it is characterized in that, described pin is cylindrical, and a columniform bottom surface contacts with magnet ring, the side projects to beyond the outer surface of described magnet ring, uses so that the side of described pin can contact with printed circuit board (PCB).
2. magnetic bead according to claim 1, is characterized in that, described two pins is respectively arranged with towards the one side of through hole the connecting elements that cooperatively interacts, and described connecting elements passes described through hole and mutually pegs graft.
3. magnetic bead according to claim 2, is characterized in that, the part that described connecting elements is connected with a pin is Metallic rod, and the part that is connected with another pin is the metal jack that cooperatively interacts with Metallic rod.
4. magnetic bead according to claim 1, it is characterized in that, further comprise a connecting rod, described pin has respectively a through hole, described connecting rod passes the through hole of pin and magnet ring, in order to be arranged at the pin electric connection at through hole two ends, described connecting rod has bending from the through hole extension of pin, is used for described pin is fixed in the two ends of described magnet ring.
5. magnetic bead according to claim 1, is characterized in that, described magnet ring is cylindrical or prismatic.
6. a printed circuit board (PCB), comprise electric crystal, it is characterized in that, also comprises at least one magnetic bead claimed in claim 1, and the pin of described magnetic bead and printed circuit board (PCB) are electrically connected.
7. printed circuit board (PCB) according to claim 6, is characterized in that, described electric crystal is arranged at the one side of printed circuit board (PCB), and described magnetic bead is arranged at the another side of printed circuit board (PCB).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727358 CN203013488U (en) | 2012-12-26 | 2012-12-26 | Magnetic bead and printed circuit board using the same |
| TW102203940U TWM461304U (en) | 2012-12-26 | 2013-03-04 | Magnetic beads and printed circuit board using the magnetic beads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727358 CN203013488U (en) | 2012-12-26 | 2012-12-26 | Magnetic bead and printed circuit board using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203013488U true CN203013488U (en) | 2013-06-19 |
Family
ID=48605055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220727358 Expired - Fee Related CN203013488U (en) | 2012-12-26 | 2012-12-26 | Magnetic bead and printed circuit board using the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203013488U (en) |
| TW (1) | TWM461304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744729A (en) * | 2016-04-22 | 2016-07-06 | 上海天马微电子有限公司 | Flexible circuit board, electronic equipment and electromagnetic interference filtering method thereof |
-
2012
- 2012-12-26 CN CN 201220727358 patent/CN203013488U/en not_active Expired - Fee Related
-
2013
- 2013-03-04 TW TW102203940U patent/TWM461304U/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744729A (en) * | 2016-04-22 | 2016-07-06 | 上海天马微电子有限公司 | Flexible circuit board, electronic equipment and electromagnetic interference filtering method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM461304U (en) | 2013-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20151226 |
|
| EXPY | Termination of patent right or utility model |