CN202587578U - Flexible flat cable assembly - Google Patents
Flexible flat cable assembly Download PDFInfo
- Publication number
- CN202587578U CN202587578U CN 201120532483 CN201120532483U CN202587578U CN 202587578 U CN202587578 U CN 202587578U CN 201120532483 CN201120532483 CN 201120532483 CN 201120532483 U CN201120532483 U CN 201120532483U CN 202587578 U CN202587578 U CN 202587578U
- Authority
- CN
- China
- Prior art keywords
- flat cable
- flexible flat
- shielding layer
- metal shielding
- hollow
- 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
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Abstract
The utility model discloses a flexible flat cable assembly (1) which includes a flexible flat cable (2), a printed circuit board (3) which is electrically connected with the flexible flat cable, and a fixing body (4) which covers a connection part between the flexible flat cable and the printed circuit board. One surface of the flexible flat cable is provided with a metal shielding layer (23). The metal shielding layer includes a first metal shielding layer (231) and a second metal shielding layer (232) which are adjacent to each other. The second metal shielding layer is shielded by the fixing body. The first metal shielding layer is provided with multiple first hollow units (24). The second metal shielding layer is also provided with multiple second hollow units (25). The area of the first hollow unit is smaller than the area of the second hollow unit.
Description
[technical field]
The utility model relates to a kind of flexible flat cable assembly, refer to especially a kind of comprise flexible flat cable and with the flexible flat cable assembly of the printed circuit board (PCB) of its welding.
[background technology]
In the prior art; After flexible flat cable in the flexible flat cable assembly is soldered to printed circuit board (PCB); Generally can flexible flat cable be positioned at printed circuit board (PCB), thereby increase the confining force between flexible flat cable and the printed circuit board (PCB) through the mode of encapsulating.Yet flexible flat cable exists scolding tin and encapsulating to make the characteristic impedance of the end that flexible flat cable is connected with printed circuit board (PCB) obviously reduce with junction between the printed circuit board (PCB), has caused the sudden change of flexible flat cable characteristic impedance and has influenced the stable of flexible flat cable signal transmission.
Be with, need a kind of improved flexible flat cable assembly to overcome the deficiency of prior art.
[utility model content]
The purpose of the utility model is to provide a kind of flexible flat cable assembly, and when the flexible flat cable in it was connected to printed circuit board (PCB), flexible flat cable can occurrence features impedance sudden change.
To achieve these goals; The utility model adopts following technical scheme: a kind of flexible flat cable assembly; It comprises: flexible flat cable, the printed circuit board (PCB) that electrically connects with flexible flat cable and be covered in flexible flat cable and the holding body of printed circuit board (PCB) junction; A surface of said flexible flat cable is provided with the metal shielding layer; Said metal shielding layer comprises the first metal shielding layer and the second metal shielding layer of adjacent setting, and the said second metal shielding layer is covered by said holding body, and the said first metal shielding layer has some first hollow-out unit; The said second metal shielding layer also has some second hollow-out unit, and the area of said first hollow-out unit is little than the area of second hollow-out unit.
Compared with prior art; The advantage of the utility model flexible flat cable assembly is: because the metal screening rate of the link of flexible flat cable is low than the metal screening rate of flexible flat cable remainder; The characteristic impedance of the link of flexible flat cable is big than the characteristic impedance of flexible flat cable remainder; Colloid covers the characteristic impedance that has reduced flexible flat cable link 26 to printed circuit board (PCB) and the flexible flat cable link and makes that the characteristic impedance of whole piece flexible flat cable is identical like this; From having solved the problem of flexible flat cable characteristic impedance sudden change, improved the signal transmission performance of flexible flat cable.
[description of drawings]
Fig. 1 is the three-dimensional combination figure of the utility model flexible flat cable assembly.
Fig. 2 is the part three-dimensional exploded view of flexible flat cable assembly shown in Figure 1.
[embodiment]
See also Fig. 1, the printed circuit board (PCB) 3 that the utility model flexible flat cable assembly 1 comprises flexible flat cable 2, electrically connect with flexible flat cable 2 and be covered in the holding body 4 of flexible flat cable 2 and printed circuit board (PCB) 3 junctions.In this execution mode, holding body 4 is the thermosol colloid, and this thermosol colloid 4 is positioned at printed circuit board (PCB) 3 and flexible flat cable 2 further fixings together.Certainly, in other embodiments, holding body 4 also can form through the mode of a glue and be covered in flexible flat cable 2 and printed circuit board (PCB) 3 junctions.
See also Fig. 2, flexible flat cable 2 comprises conductor 21 that some horizontal parallel interval arrange, be coated on the outer insulator 22 of plurality of conductors 21 and be arranged at the metal shielding layer 23 of insulator 22 upper surfaces.The two ends of plurality of conductors 21 are exposed to and are used for outside the insulator 22 and printed circuit board (PCB) 3 electric connections.Plurality of conductors 21 is for the tin-coated copper electric wire and comprise some conductors 21 to transmission signals.One end 26 of flexible flat cable 2 is soldered to the upper surface of printed circuit board (PCB) 3 and is undertaken in printed circuit board (PCB) 3, and an end 26 of above-mentioned flexible flat cable 2 can be defined as the link 26 of flexible flat cable 2.Thermosol colloid 4 is formed at the junction of flexible flat cable 2 and printed circuit board (PCB) 3 and covers an end 26 of flexible flat cable 2.Metal shielding layer 23 adopts wire marks silver slurries (silver ink coating) or pastes wire netting (metal mesh) technology and coating or paste the upper surface of insulator 22.Have many hollow-out unit on the metal shielding layer 23.Metal shielding layer 23 comprises the first metal shielding layer 231 and the second metal shielding layer 232 of adjacent setting.Have some first hollow-out unit 24 on the first metal shielding layer 231; Have some second hollow-out unit 25 on the second metal shielding layer 232; Wherein the area of first hollow-out unit 24 is little than the area of second hollow-out unit 25; First, second hollow-out unit 24,25 shapes are roughly the same and all be evenly distributed on the surface area of whole metal shielding layer 23 with regular arrangement mode.In this execution mode, the hollow out shape of first, second hollow-out unit 24,25 is rhombus, and in other embodiments, hollow-out unit also can be designed as other geometry, for example circle, semicircle, ellipse, square, rectangle, polygonal etc.In addition, the metal material of metal shielding layer 23 is be selected from the colony that is made up of metals such as silver slurry, silver-colored carbon slurry, silver foil, aluminium paste, aluminium foil, Copper Foil and metallic composite wherein a kind of.Utilize the control metal shielding layer 23 equally distributed hollow-out unit gross areas, can shield and the area ratio of plurality of conductors 21 with regard to may command and adjustment metal shielding layer 23.This entity area portions with metal shielding layer 23 can shield and the percentage of plurality of conductors 21 gross areas is defined as the metal screening rate.Because first, second metal shielding layer 231; Have two kinds of first, second hollow-out unit 24 that area is different on 232 respectively; 25; Therefore under the equal area, the entity area of the first metal shielding layer 231 is big than the entity area of the second metal shielding layer 232, just has two kinds of different metallic screening rates like this on the flexible flat cable 2.The percentage of 231 shieldings of the first metal shielding layer and plurality of conductors 21 gross areas is big, so the metal screening rate is big, and the percentage of 232 shieldings of the second metal shielding layer and plurality of conductors 21 gross areas is little, so the metal screening rate is little.Flexible flat cable 2 has two kinds of different characteristic impedances like this.Thermosol colloid 4 covers the link 26 that is undertaken in the flexible flat cable 2 on the printed circuit board (PCB) 3, and the second metal shielding layer 232 on flexible flat cable 2 links 26 also is capped like this.Because the influence of thermosol colloid 4; Reduce some capacity effects in the flexible flat cable 2 to the conductor 21 that is used for transmission signals; Thereby reduced this regional characteristic impedance; Prevent the sudden change of whole piece flexible flat cable 2 characteristic impedances, thereby improved the signal transmission performance of flexible flat cable 2.
The utility model flexible flat cable assembly 1 is big with first hollow-out unit 24 than flexible flat cable 2 first metal shielding layers 231 of second hollow-out unit, 25 designs on the flexible flat cable 2 links 26 second metal shielding layers 232; The metal screening rate of the link 26 of flexible flat cable 2 is low than the metal screening rate of flexible flat cable 2 remainders like this; The characteristic impedance of the link 26 of flexible flat cable 2 is big than the characteristic impedance of flexible flat cable remainder; Colloid 4 covers the characteristic impedance that has reduced flexible flat cable 2 links 26 to printed circuit board (PCB) 3 and flexible flat cable 2 links 26 and makes that the characteristic impedance of whole piece flexible flat cable 2 is identical like this; From having solved the problem of flexible flat cable 2 characteristic impedances sudden changes, improved the signal transmission performance of flexible flat cable 2.
Claims (8)
1. flexible flat cable assembly; It comprises: flexible flat cable, the printed circuit board (PCB) that electrically connects with flexible flat cable and be covered in flexible flat cable and the holding body of printed circuit board (PCB) junction; It is characterized in that: a surface of said flexible flat cable is provided with the metal shielding layer; Said metal shielding layer comprises the first metal shielding layer and the second metal shielding layer of adjacent setting; The said second metal shielding layer is covered by said holding body; The said first metal shielding layer has some first hollow-out unit, and the said second metal shielding layer also has some second hollow-out unit, and the area of said first hollow-out unit is little than the area of second hollow-out unit.
2. flexible flat cable assembly as claimed in claim 1 is characterized in that: said flexible flat cable also comprises the conductor that some horizontal cross are arranged and is coated on the outer insulator of plurality of conductors.
3. flexible flat cable assembly as claimed in claim 2 is characterized in that: an end of said plurality of conductors is exposed to insulator and welds together with printed circuit board (PCB).
4. flexible flat cable assembly as claimed in claim 1 is characterized in that: said holding body is the thermosol colloid.
5. flexible flat cable assembly as claimed in claim 1 is characterized in that: an end of said flexible flat cable is undertaken in said printed circuit board (PCB), and an end of said flexible flat cable and printed circuit board (PCB) weld and covered by said holding body.
6. flexible flat cable assembly as claimed in claim 1 is characterized in that: the metal shielding layer adopts wire mark silver slurry or pastes the wire netting technology and coating or paste the surface of insulator.
7. flexible flat cable assembly as claimed in claim 1 is characterized in that: the hollow out shape of said first, second hollow-out unit is rhombus.
8. flexible flat cable assembly as claimed in claim 1 is characterized in that: the hollow out shape of said first, second hollow-out unit can be circle, semicircle, ellipse, square, rectangle, polygonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120532483 CN202587578U (en) | 2011-12-19 | 2011-12-19 | Flexible flat cable assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120532483 CN202587578U (en) | 2011-12-19 | 2011-12-19 | Flexible flat cable assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202587578U true CN202587578U (en) | 2012-12-05 |
Family
ID=47256926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120532483 Expired - Fee Related CN202587578U (en) | 2011-12-19 | 2011-12-19 | Flexible flat cable assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202587578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130506A (en) * | 2015-12-22 | 2019-01-04 | 精工爱普生株式会社 | Liquid ejection apparatus and flexible flat cable |
-
2011
- 2011-12-19 CN CN 201120532483 patent/CN202587578U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130506A (en) * | 2015-12-22 | 2019-01-04 | 精工爱普生株式会社 | Liquid ejection apparatus and flexible flat cable |
| CN109130506B (en) * | 2015-12-22 | 2020-08-25 | 精工爱普生株式会社 | Liquid ejecting apparatus and flexible flat cable |
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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: 20121205 Termination date: 20191219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |