CN206274465U - Flexible flat cable structure and flexible flat cable fixing structure for electrical connector - Google Patents
Flexible flat cable structure and flexible flat cable fixing structure for electrical connector Download PDFInfo
- Publication number
- CN206274465U CN206274465U CN201621039107.8U CN201621039107U CN206274465U CN 206274465 U CN206274465 U CN 206274465U CN 201621039107 U CN201621039107 U CN 201621039107U CN 206274465 U CN206274465 U CN 206274465U
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- China
- Prior art keywords
- flat cable
- flexible flat
- transmission line
- layer
- insulating coating
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Abstract
A kind of flexible flat cable structure and flexible flat cable fixing structure for electrical connector.The flexible flat cable structure includes several transmission line groups and one second insulating coating.Several transmission line groups are arranged in parallel with each other, and maintain one to be spaced between each transmission line group and adjacent transmission line group.Each transmission line group includes an at least holding wire, a first screen layer, one first earth conductor and a secondary shielding layer.Each holding wire includes a signal conductor and one first insulating coating.The signal conductor is used for transmitting data-signal or power supply.First insulating coating coats the signal conductor.The first screen layer contacts first insulating coating of each holding wire around the holding wire.First earth conductor is located at the side of the holding wire and contacts the first screen layer, for transmitting ground voltage.The secondary shielding layer surrounds and contacts first earth conductor and the first screen layer.Second insulating coating coats the secondary shielding layer of several transmission line groups.
Description
【Technical field】
The utility model is related to a kind of flexible flat cable structure, espespecially a kind of flexible flat cable for reducing electromagnetic interference
Structure.
【Background technology】
Flexible flat flat cable (Flex Flat Cable, FFC), is a kind of new data cable.It is using insulation
Material and very thin tin plating flat copper wire, it is made by automation equipment pressing.Due to core marshalling, transmission quantity
Greatly, the features such as flat structure, compact, convenient disassembly, tool pliability, energy is simple and is flexibly applied to each electron-like product
Product, are used as data transmission cable.Flexible flat flat cable is particularly suited for the occasion of various high-frequency bendings, for example, move
The connection of dynamic component.In connection, it can not only use connector grafting, it is also possible to be directly welded on printed circuit board (PCB).
The volume of electronic product therefore is applied to the line of electronic product towards the design of frivolous compact (compactness)
Cable size also must and then reduce.In addition the data transmission bauds of electronic product is towards high speed, to the high speed signal of transmission line
Transmission quality requirements also more and more higher, in order to improve the quality of transmission line, it is necessary to reduce interference between holding wire and improve signal
Electromagnetic interference (Electromagnetic Disturbance, the EMI) problem produced during transmission.The signal of conventional flat cable
Do not have metallic shield between line, interference can be produced to adjacent holding wire during high speed transmission of signals, influence signal
Transmission quality.Traditional flat cable coats metal foil by by the outside of holding wire, it is possible to reduce in high speed transmission of signals mistake
The interference produced to adjacent signals line in journey.But the metallic shield of all holding wires of conventional flat cable only has cladding individual layer
Metal foil, and metal foil only contacts with single earth conductor.But conventional flat cable is easily because bending causes metal foil
Contact unstable with single earth conductor.
【Utility model content】
In consideration of it, being necessary to provide a kind of flexible flat cable structure and flexible flat cable electric connector fixed knot
Structure, to solve conventional flat cable because bending causes metal foil to contact unstable technical problem with single earth conductor.
The utility model embodiment discloses a kind of flexible flat cable structure, and it includes several transmission line groups and one second exhausted
Edge overcoat.Several transmission line groups are arranged in parallel with each other, and maintain one to be spaced between each transmission line group and adjacent transmission line group.
Each transmission line group is comprising at leastOneHolding wire, a first screen layer, one first earth conductor and a secondary shielding layer.Each letter
Number line includes a signal conductor and one first insulating coating.The signal conductor is used for transmitting data-signal or power supply.This first
Insulating coating coats the signal conductor.The first screen layer contacts first insulation of each holding wire around the holding wire
Overcoat.First earth conductor is located at the side of the holding wire and contacts the first screen layer, for transmitting ground voltage.This
Two screen layers surround and contact first earth conductor and the first screen layer.Second insulating coating coats several transmission
The secondary shielding layer of line group.
According to embodiment of the present utility model, in fractional transmission line group, at least two adjacent signals lines of the holding wire
The first insulating coating be to contact with each other.
According to embodiment of the present utility model, at least two of the fractional transmission line group holding wires and the first screen layer
Between have cushion space.
According to embodiment of the present utility model, fractional transmission line group additionally comprises one second earth conductor, and first ground connection is led
Body and second earth conductor are located at two both sides of the holding wire and contact the first screen layer respectively, for transmitting ground connection electricity
Pressure.
According to embodiment of the present utility model, second earth conductor of fractional transmission line group, the first screen layer and should
There is cushion space between secondary shielding layer.
According to embodiment of the present utility model, first earth conductor of each transmission line group, the first screen layer and should
There is cushion space between secondary shielding layer.
According to embodiment of the present utility model, the first screen layer includes one first conductive layer and a separation layer.This first
The conductive layers make contact secondary shielding layer.The separation layer coats first insulating coating.
According to embodiment of the present utility model, the secondary shielding layer includes one second conductive layer and one the 3rd conductive layer.Should
Second conductive layers make contact, first earth conductor and first conductive layer.3rd conductive layers make contact second insulating coating.
According to embodiment of the present utility model, first insulating coating and second insulating coating are by polyethylene
(polyethylene, PE), polyvinyl chloride (polyvinyl chloride, PVC), thermoplastic elastomer (TPE) (Thermoplastic
Elastomer, TPE), thermoplastic polyurethane (Thermoplastic Polyurethane, TPU), thermoplastic elastomer
(thermoplastic rubber, TPR), TPO (Thermoplastic Polyolefin, TPO), polyurethane
(Polyurethane, PUR), polypropylene (Polypropylene, PP), polyolefin (Polyolefins, PO), PVDF
(PolyVinyliDene Fluoride), chlorotrifluoroethylene (Ethylene- of ethene one
Chlorotrifluororthylene copolymer, ECTFE), ethylene-tetrafluoroethylene copolymer (ethylene-tetra-
Fluoro-ethylene, ETFE), Teflon exhaustive fluorinated ethylene propylene (Teflon Fluorinated ethylene
Propylene, Teflon FEP), polytetrafluoroethylene (PTFE) (Polytetrafluoroethene, PTFE), Teflon (Teflon) or
It is one of nylon (Nylon) composition.
The utility model embodiment discloses a kind of flexible flat cable fixing structure for electrical connector again, and it is included：One electricity
Connector and flexible flat cable structure.The electric connector includes a pedestal, a circuit board, several terminals and a shell.Should
Distance piece is connected on the pedestal, and the distance piece has several accepting grooves.The circuit board has several conductive parts and several companies
Socket part, several conductive parts are electrically connected with corresponding connecting portion.One end of several terminals is through corresponding accepting groove and is connected to
Several connecting portions.The shell is connected to the pedestal.The flexible flat cable structure system includes foregoing flexible flat cable structure.
The utility model has the advantages that：Compared to prior art, the flexible flat of the utility model embodiment
Whole holding wires are divided into several transmission line groups, and each biography by the construction of cable and flexible flat cable fixing structure for electrical connector
Defeated line group includes first screen layer, secondary shielding layer and earth conductor.The first screen layer and the secondary shielding layer have reflection
With the ability of electromagnetic wave absorption.The earth conductor is arranged between the first screen layer and the secondary shielding layer so that this first
Screen layer and the secondary shielding layer can all be formed with the earth conductor and contacted, thus the earth conductor and the first screen layer and
The double sided contacts of the secondary shielding layer can make flexible flat cable bonding structure more stable.The signal of each transmission line group
Line is respectively coated by the first screen layer and the secondary shielding layer also causes that flexible flat cable structure has than conventional flat cable
More preferable anti-EMI filter ability, therefore flexible flat cable structure of the present utility model can improve conventional flat cable in signal biography
The EMI problems produced when defeated.
It is that the above of the present utility model can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawing
Formula, is described in detail below：
【Brief description of the drawings】
Fig. 1 is the exploded view of the flexible flat cable fixing structure for electrical connector of the utility model.
Fig. 2 and Fig. 3 are respectively the constitutional diagrams of Fig. 1 flexible flat cable fixing structure for electrical connector different visual angles.
Fig. 4 is the top view of Fig. 1 flexible flat cable fixing structure for electrical connector.
Fig. 5 is the flexible flat cable structure of Fig. 4 along the profile of A-A ' lines.
Fig. 6 illustrates the structural representation of first screen layer, first screen layer and the holding wire of the utility model embodiment.
The realization of the utility model embodiment purpose, functional characteristics and advantage will be done into one referring to the drawings in conjunction with the embodiments
Step explanation.
【Specific embodiment】
It is concrete function, the purpose that can further appreciate that feature of the present utility model, technological means and reached, enumerates
More specific embodiment, describes in detail as after after with schema, figure number.
The explanation of following embodiment is, with reference to additional schema, to be used to illustrate that the utility model may be used to implement is specific
Embodiment.The direction term that the utility model is previously mentioned, for example " on ", D score, "front", "rear", "left", "right", " top ", "
Bottom ", " level ", " vertical " etc., are only the directions with reference to annexed drawings.Therefore, the direction term for using is to illustrate and manage
Solution the utility model, and be not used to limit the utility model.
Please also refer to Fig. 1 to Fig. 4, Fig. 1 divides for the flexible flat cable fixing structure for electrical connector 1 of the utility model
Xie Tu, Fig. 2 and Fig. 3 are respectively the constitutional diagrams of the different visual angles of Fig. 1 flexible flat cables fixing structure for electrical connector 1.Fig. 4 is Fig. 1
The top view of flexible flat cable fixing structure for electrical connector 1.Flexible flat cable fixing structure for electrical connector 1 includes electrical connection
Device 10 and flexible flat cable structure 20.Flexible flat cable structure 20 is to be inserted in electric connector 10.Electric connector 10 can
Being to meet the data transfer rates such as HDMI/USB3.0/USB3.1/Display Port/SATA (data rate) more than 1Gb/s specifications
Connector.
Electric connector 10 includes a pedestal 12, a circuit board 14, a distance piece 15, the shell 18 of several terminals 16 and.Between
Spacing body 15 is connected on pedestal 12, and distance piece 15 has several accepting grooves 152.Circuit board 14 have several conductive parts 142 and
Several connecting portions 144, several conductive parts 142 are electrically connected with corresponding connecting portion 144.One end of several terminals 16 passes through corresponding
Accepting groove 152 is simultaneously connected to several connecting portions 144.Shell 18 is connected to pedestal 12.
Fig. 5 is referred to, Fig. 5 is the flexible flat cable structure 20 of Fig. 4 along the profile of A-A ' lines.Flexible flat cable knot
Structure 20 includes several transmission line groups 21a, 21b and one second insulating coating 242.Several transmission line group 21a, 21b rows parallel to each other
Row, two adjacent transmission lines group 21a maintenance interval Ds 1, two adjacent transmission lines group 21b maintenance interval Ds 2, adjacent transmission lines group 21a,
21b maintains an interval D 3.Interval D 1-D3 can optionally be set as that all equal wherein any two spacing are equal or complete
Portion is unequal.Transmission line group 21a can include one or two holding wire 22, a first screen layer 251, one first earth conductor
261 and a secondary shielding layer 252.Transmission line group 21b leads comprising two holding wires 22, the ground connection of a first screen layer 251, one first
Body 261, one second earth conductor 262 and a secondary shielding layer 252.In other embodiments, transmission line group 21a, 21b can be included
The holding wire 22 of more than three.Each holding wire 22 includes a signal conductor 221 and one first insulating coating 241.Several biographies
Several signal conductors 221 of defeated line group 21a, 21b are set parallel to each other, and several signal conductors 221 can be used for transmitting electricity according to need
Source or data-signal, signal conductor 221 can be single round conductor or multicore round conductor pair twist.First insulating coating
241 cladding signal conductors 221.First screen layer 251 contacts the first insulating coating of each holding wire 22 around holding wire 22
241.In transmission line group 21a, the first earth conductor 261 is located at the side of holding wire 22 and contacts first screen layer 251, is used for
Transmission ground voltage.In transmission line group 21b, the first earth conductor 261 and the second earth conductor 262 are located at two signals respectively
The both sides of line 22 simultaneously contact first screen layer 251, for transmitting ground voltage.Secondary shielding layer 252 surrounds and contacts first and connects
Earthed conductor 261 and first screen layer 251.Second insulating coating 242 coats the secondary shielding layer of several transmission line groups 21a, 21b
252。
In fractional transmission line group 21a, 21b, the first insulating coating 241 of adjacent signals line 22 is to contact with each other.In addition
There is cushion space R1 between the holding wire 22 and first screen layer 251 of fractional transmission line group 21a, 21b.Work as flexible flat cable
When structure 20 bends or is squeezed, cushion space R1 can increase the pliability of flat cable.
In each transmission line group 21a, 21b, the first earth conductor 261, first screen layer 251 and secondary shielding layer 252
Between have cushion space R2.Second earth conductor 262, between first screen layer 251 and secondary shielding layer 252 also have buffering
Space R2.When flexible flat cable structure 20 bends or is squeezed, cushion space R2 can increase the soft of flat cable
Softness.
In this embodiment, fractional transmission line group 21 includes two signal lines 22 and a ground wire 261.Ground wire
261 are coated by the second insulating coating 242.Metal shielding layer 26 is used to isolate the first insulating coating 241 and the second insulating coating
242, and metal shielding layer 26 forms metallic shield to several holding wires 22.Metal shielding layer 26 can be wire netting or metal
Thin slice.Fractional transmission line group 21 can also include the holding wire 22 and a ground wire 261 of more than three.And each transmission line group
21 signal conductor 221 is all coated by the first insulating coating 241, and each group of the first insulating coating 241 of transmission line group 21
It is surround by metal shielding layer 26.
Several signal conductors 221 of flexible flat cable structure 20 are to protrude from the second insulating coating 242 and the first insulation
Overcoat 241, the first earth conductor 261 and the second earth conductor 262 protrude from the second insulating coating 242.Work as flexible flat cable
When structure 20 is inserted in electric connector 10, prominent signal conductor 221, the first earth conductor 261 and the second earth conductor 262 can
Electrically contact to the corresponding conductive part 142 of circuit board 14.
Fig. 6 is referred to, Fig. 6 illustrates first screen layer 251, first screen layer 251 and the signal of the utility model embodiment
The structural representation of line 22.First screen layer 251 includes the first conductive layer 2511 and separation layer 2512.Secondary shielding layer 252 is wrapped
Containing the second conductive layer 2522 and the 3rd conductive layer 2523.It is preferred that secondary shielding layer 252 additionally comprises binder couse (bonding
layer)2524.When the second conductive layer 2522 and the 3rd conductive layer 2523 use the material of different conductive characteristics, binder couse
2524 can be used to isolate the second conductive layer 2522 and the 3rd conductive layer 2523, also allow for the second conductive layer 2522 and the 3rd conductive layer
2523 are respectively arranged on the opposite sides of binder couse 2524.3rd conductive layer 2523 contacts the second insulating coating 242.First
Conductive layer 2511 contacts secondary shielding layer 252, and separation layer 2512 coats the first insulating coating 241.Separation layer 2512 is by non-conductive
Material composition, for the conductive layer 2511 of isolation signals line 22 and first.Second conductive layer 2522 contacts the first earth conductor 261
With the first conductive layer 2511.3rd conductive layer 2523 contacts the second insulating coating 242.First conductive layer 2511, the second conductive layer
2522 and the 3rd conductive layer 2523 can be film or grid that conductive metal (such as aluminium, copper, silver) is formed, for reflecting
With electromagnetic wave absorption.
Contact the first conductive layer of first screen layer 251 simultaneously due to the first earth conductor 261 and the second earth conductor 262
2511 and the second conductive layer 2522 of secondary shielding layer 252 so that the first earth conductor 261 and the second earth conductor 262 compare
It is firm.In addition the circular holding wire 22 of first conductive layer 2511 pairs of first screen layer 251 forms metallic shield, it is to avoid signal
The signal of the transmission of line 22 can be disturbed.In addition, the circular holding wire 22 of secondary shielding layer 252 pairs forms metallic shield, can be with
It is further added by the antijamming capability of holding wire 22.
The material of the first insulating coating 241 and the second insulating coating 242 can be differed.It is preferred that the first insulating coating
241 and second insulating coating 242 can be polyethylene (polyethylene, PE), polyvinyl chloride (polyvinyl
Chloride, PVC), thermoplastic elastomer (TPE) (Thermoplastic Elastomer, TPE), thermoplastic polyurethane
(Thermoplastic Polyurethane, TPU), thermoplastic elastomer (thermoplastic rubber, TPR), thermoplasticity
Polyolefin (Thermoplastic Polyolefin, TPO), polyurethane (Polyurethane, PUR), polypropylene
(Polypropylene, PP), polyolefin (Polyolefins, PO), PVDF (PolyVinyliDene Fluoride), ethene
One chlorotrifluoroethylene (Ethylene-chlorotrifluororthylene copolymer, ECTFE), ethene-four
Fluoride copolymers (ethylene-tetra-fluoro-ethylene, ETFE), Teflon exhaustive fluorinated ethylene propylene
(Teflon Fluorinated ethylene propylene, Teflon FEP), polytetrafluoroethylene (PTFE)
The heat-resistant insulation material such as (Polytetrafluoroethene, PTFE), Teflon (Teflon) or nylon (Nylon).And believe
Number conductor 221, the first earth conductor 261 and the second earth conductor 262 can be very thin tin plating flat copper wires.
The flexible flat cable structure and flexible flat cable fixing structure for electrical connector of the utility model embodiment will be complete
Portion's holding wire is divided into several transmission line groups, and each transmission line group includes first screen layer, secondary shielding layer and earth conductor.
The first screen layer and the secondary shielding layer have the ability of reflection and electromagnetic wave absorption.The earth conductor is arranged on first screen
Cover between layer and the secondary shielding layer so that the first screen layer and the secondary shielding layer are all formed with the earth conductor and contacted,
Therefore the earth conductor can make flexible flat cable bonding with the double sided contacts of the first screen layer and the secondary shielding layer
Structure is more stable.The holding wire of each transmission line group is respectively coated by the first screen layer and the secondary shielding layer also cause it is soft
Flat cable structure has anti-EMI filter ability more more preferable than conventional flat cable, therefore flexible flat cable knot of the present utility model
Structure can improve the EMI problems that conventional flat cable is produced in signal transmission.
In sum, although the utility model is disclosed above with preferred embodiment, but the preferred embodiment and it is not used to
Limitation the utility model, one of ordinary skill in the field is not being departed from spirit and scope of the present utility model, can make each
Plant to change and be defined by the scope that claim is defined with retouching, therefore protection domain of the present utility model.
Claims (10)
1. a kind of flexible flat cable structure, it is characterised in that it includes：
Several transmission line groups, are arranged in parallel with each other, and maintain one to be spaced between each transmission line group and adjacent transmission line group, each
Transmission line group is included：
An at least holding wire, each holding wire is included：
One signal conductor, for transmitting data-signal or power supply；And
One first insulating coating, coats the signal conductor；
One first screen layer, around the holding wire, and contacts first insulating coating of each holding wire；
One first earth conductor, positioned at the side of the holding wire and contacts the first screen layer, for transmitting ground voltage；And
One secondary shielding layer, surrounds and contacts first earth conductor and the first screen layer；And one second insulating coating, bag
Cover the secondary shielding layer of several transmission line groups.
2. flexible flat cable structure as claimed in claim 1, it is characterised in that in fractional transmission line group, at least two should
First insulating coating of the adjacent signals line of holding wire is to contact with each other.
3. flexible flat cable structure as claimed in claim 1, it is characterised in that at least two of the fractional transmission line group letters
There is number between line and the first screen layer cushion space.
4. flexible flat cable structure as claimed in claim 1, it is characterised in that fractional transmission line group additionally comprises one second and connects
Earthed conductor, first earth conductor and second earth conductor are located at two both sides of the holding wire and contact first screen respectively
Layer is covered, for transmitting ground voltage.
5. flexible flat cable structure as claimed in claim 4, it is characterised in that second ground connection of each transmission line group is led
There is cushion space between body, the first screen layer and the secondary shielding layer.
6. flexible flat cable structure as claimed in claim 1, it is characterised in that in each transmission line group first ground connection
There is cushion space between conductor, the first screen layer and the secondary shielding layer.
7. flexible flat cable structure as claimed in claim 1, it is characterised in that the first screen layer is included：
One first conductive layer, contacts the secondary shielding layer；And
One separation layer, coats first insulating coating.
8. flexible flat cable structure as claimed in claim 7, it is characterised in that the secondary shielding layer is included：
One second conductive layer, contacts first earth conductor and first conductive layer；And
One the 3rd conductive layer, contacts second insulating coating.
9. flexible flat cable structure as claimed in claim 1, it is characterised in that first insulating coating and second insulation
Overcoat is by polyethylene, polyvinyl chloride, thermoplastic elastomer (TPE), thermoplastic polyurethane, thermoplastic elastomer, TPO, poly-
Urethane, polypropylene, polyolefin, PVDF, the chlorotrifluoroethylene of ethene one, ethylene-tetrafluoroethylene copolymer, Teflon are poly- complete
One of fluoro ethyl propene resin, polytetrafluoroethylene (PTFE), Teflon or nylon are constituted.
10. a kind of flexible flat cable fixing structure for electrical connector, it is included：
One electric connector, it is included：
One pedestal；
One distance piece, is connected on the pedestal, and the distance piece has several accepting grooves；
One circuit board, with several conductive parts and several connecting portions, several conductive parts are electrically connected with corresponding connecting portion；
Several terminals, one end of the several terminals passes through corresponding accepting groove and is connected to several connecting portions；And
One shell, is connected to the pedestal；And
One flexible flat cable structure, it is characterised in that the flexible flat cable structure is included such as claim 1-9 any institute
The flexible flat cable structure stated, wherein first earth conductor or the second earth conductor and the signal conductor are connected to several being somebody's turn to do
Conductive part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621039107.8U CN206274465U (en) | 2016-09-06 | 2016-09-06 | Flexible flat cable structure and flexible flat cable fixing structure for electrical connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621039107.8U CN206274465U (en) | 2016-09-06 | 2016-09-06 | Flexible flat cable structure and flexible flat cable fixing structure for electrical connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206274465U true CN206274465U (en) | 2017-06-23 |
Family
ID=59063031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621039107.8U Expired - Fee Related CN206274465U (en) | 2016-09-06 | 2016-09-06 | Flexible flat cable structure and flexible flat cable fixing structure for electrical connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206274465U (en) |
-
2016
- 2016-09-06 CN CN201621039107.8U patent/CN206274465U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170623 |